Separate stream compression from message-wise compression

include/grpc/compression.h

@@ -36,19 +36,38 @@ extern "C" {
 GRPCAPI int grpc_compression_algorithm_parse(
     grpc_slice value, grpc_compression_algorithm *algorithm);
 
+/** Parses the first \a name_length bytes of \a name as a
+ * grpc_stream_compression_algorithm instance, updating \a algorithm. Returns 1
+ * upon success, 0 otherwise. */
+int grpc_stream_compression_algorithm_parse(
+    grpc_slice name, grpc_stream_compression_algorithm *algorithm);
+
 /** Updates \a name with the encoding name corresponding to a valid \a
  * algorithm. Note that \a name is statically allocated and must *not* be freed.
  * Returns 1 upon success, 0 otherwise. */
 GRPCAPI int grpc_compression_algorithm_name(
     grpc_compression_algorithm algorithm, char **name);
 
+/** Updates \a name with the encoding name corresponding to a valid \a
+ * algorithm. Note that \a name is statically allocated and must *not* be freed.
+ * Returns 1 upon success, 0 otherwise. */
+GRPCAPI int grpc_stream_compression_algorithm_name(
+    grpc_stream_compression_algorithm algorithm, char **name);
+
 /** Returns the compression algorithm corresponding to \a level for the
  * compression algorithms encoded in the \a accepted_encodings bitset.
  *
- * It abort()s for unknown levels . */
+ * It abort()s for unknown levels. */
 GRPCAPI grpc_compression_algorithm grpc_compression_algorithm_for_level(
     grpc_compression_level level, uint32_t accepted_encodings);
 
+/** Returns the stream compression algorithm corresponding to \a level for the
+ * compression algorithms encoded in the \a accepted_stream_encodings bitset.
+ * It abort()s for unknown levels. */
+GRPCAPI grpc_stream_compression_algorithm
+grpc_stream_compression_algorithm_for_level(grpc_stream_compression_level level,
+                                            uint32_t accepted_stream_encodings);
+
 GRPCAPI void grpc_compression_options_init(grpc_compression_options *opts);
 
 /** Mark \a algorithm as enabled in \a opts. */
@@ -63,6 +82,11 @@ GRPCAPI void grpc_compression_options_disable_algorithm(
 GRPCAPI int grpc_compression_options_is_algorithm_enabled(
     const grpc_compression_options *opts, grpc_compression_algorithm algorithm);
 
+/** Returns true if \a algorithm is marked as enabled in \a opts. */
+GRPCAPI int grpc_compression_options_is_stream_compression_algorithm_enabled(
+    const grpc_compression_options *opts,
+    grpc_stream_compression_algorithm algorithm);
+
 #ifdef __cplusplus
 }
 #endif

include/grpc/impl/codegen/compression_types.h

@@ -38,6 +38,10 @@ extern "C" {
  * Its value is an int from the \a grpc_compression_algorithm enum. */
 #define GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM \
   "grpc.default_compression_algorithm"
+/** Default stream compression algorithm for the channel.
+ * Its value is an int from the \a grpc_stream_compression_algorithm enum. */
+#define GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM \
+  "grpc.default_stream_compression_algorithm"
 /** Default compression level for the channel.
  * Its value is an int from the \a grpc_compression_level enum. */
 #define GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL "grpc.default_compression_level"
@@ -50,6 +54,15 @@ extern "C" {
  * be ignored). */
 #define GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET \
   "grpc.compression_enabled_algorithms_bitset"
+/** Stream compression algorithms supported by the channel.
+ * Its value is a bitset (an int). Bits correspond to algorithms in \a
+ * grpc_stream_compression_algorithm. For example, its LSB corresponds to
+ * GRPC_STREAM_COMPRESS_NONE, the next bit to GRPC_STREAM_COMPRESS_DEFLATE, etc.
+ * Unset bits disable support for the algorithm. By default all algorithms are
+ * supported. It's not possible to disable GRPC_STREAM_COMPRESS_NONE (the
+ * attempt will be ignored). */
+#define GRPC_STREAM_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET \
+  "grpc.stream_compression_enabled_algorithms_bitset"
 /** \} */
 
 /** The various compression algorithms supported by gRPC */
@@ -61,6 +74,13 @@ typedef enum {
   GRPC_COMPRESS_ALGORITHMS_COUNT
 } grpc_compression_algorithm;
 
+/** Stream compresssion algorithms supported by gRPC */
+typedef enum {
+  GRPC_STREAM_COMPRESS_NONE = 0,
+  GRPC_STREAM_COMPRESS_GZIP,
+  GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT
+} grpc_stream_compression_algorithm;
+
 /** Compression levels allow a party with knowledge of its peer's accepted
  * encodings to request compression in an abstract way. The level-algorithm
  * mapping is performed internally and depends on the peer's supported
@@ -73,30 +93,59 @@ typedef enum {
   GRPC_COMPRESS_LEVEL_COUNT
 } grpc_compression_level;
 
+/** Compression levels for stream compression algorithms */
+typedef enum {
+  GRPC_STREAM_COMPRESS_LEVEL_NONE = 0,
+  GRPC_STREAM_COMPRESS_LEVEL_LOW,
+  GRPC_STREAM_COMPRESS_LEVEL_MED,
+  GRPC_STREAM_COMPRESS_LEVEL_HIGH,
+  GRPC_STREAM_COMPRESS_LEVEL_COUNT
+} grpc_stream_compression_level;
+
 typedef struct grpc_compression_options {
   /** All algs are enabled by default. This option corresponds to the channel
    * argument key behind \a GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET
    */
   uint32_t enabled_algorithms_bitset;
+  uint32_t enabled_stream_compression_algorithms_bitset;
 
-  /** The default channel compression level. It'll be used in the absence of
-   * call specific settings. This option corresponds to the channel argument key
-   * behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL. If present, takes
-   * precedence over \a default_algorithm.
+  /** The default message-wise compression level. It'll be used in the absence
+   * of * call specific settings. This option corresponds to the channel
+   * argument key behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL. If present,
+   * takes precedence over \a default_algorithm and \a
+   * default_stream_compression_algorithm.
    * TODO(dgq): currently only available for server channels. */
   struct {
     int is_set;
     grpc_compression_level level;
   } default_level;
 
-  /** The default channel compression algorithm. It'll be used in the absence of
-   * call specific settings. This option corresponds to the channel argument key
-   * behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM. */
+  /** The default stream compression level. It'll be used in the absence of call
+   * specefic settings. If present, takes precedence over \a default_level,
+   * \a default_algorithm and \a default_stream_compression_algorithm. */
+  struct {
+    int is_set;
+    grpc_stream_compression_level level;
+  } default_stream_compression_level;
+
+  /** The default message-wise compression algorithm. It'll be used in the
+   * absence of call specific settings. This option corresponds to the channel
+   * argument key behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM. */
   struct {
     int is_set;
     grpc_compression_algorithm algorithm;
   } default_algorithm;
 
+  /** The default stream compression algorithm. It'll be used in the absence of
+   * call specific settings. If present, takes precedence over \a
+   * default_algorithm. This option corresponds to the channel
+   * argument key behind \a GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM.
+   */
+  struct {
+    int is_set;
+    grpc_stream_compression_algorithm algorithm;
+  } default_stream_compression_algorithm;
+
 } grpc_compression_options;
 
 #ifdef __cplusplus

include/grpc/impl/codegen/grpc_types.h

@@ -491,6 +491,10 @@ typedef struct grpc_op {
         uint8_t is_set;
         grpc_compression_level level;
       } maybe_compression_level;
+      struct {
+        uint8_t is_set;
+        grpc_stream_compression_level level;
+      } maybe_stream_compression_level;
     } send_initial_metadata;
     struct {
       struct grpc_byte_buffer *send_message;

src/core/ext/filters/http/message_compress/message_compress_filter.c

@@ -44,7 +44,9 @@
 typedef struct call_data {
   grpc_slice_buffer slices; /**< Buffers up input slices to be compressed */
   grpc_linked_mdelem compression_algorithm_storage;
+  grpc_linked_mdelem stream_compression_algorithm_storage;
   grpc_linked_mdelem accept_encoding_storage;
+  grpc_linked_mdelem accept_stream_encoding_storage;
   uint32_t remaining_slice_bytes;
   /** Compression algorithm we'll try to use. It may be given by incoming
    * metadata, or by the channel's default compression settings. */
@@ -78,6 +80,13 @@ typedef struct channel_data {
   uint32_t enabled_algorithms_bitset;
   /** Supported compression algorithms */
   uint32_t supported_compression_algorithms;
+
+  /** The default, channel-level, stream compression algorithm */
+  grpc_stream_compression_algorithm default_stream_compression_algorithm;
+  /** Bitset of enabled stream compression algorithms */
+  uint32_t enabled_stream_compression_algorithms_bitset;
+  /** Supported stream compression algorithms */
+  uint32_t supported_stream_compression_algorithms;
 } channel_data;
 
 static bool skip_compression(grpc_call_element *elem, uint32_t flags,
@@ -109,31 +118,53 @@ static grpc_error *process_send_initial_metadata(
   call_data *calld = elem->call_data;
   channel_data *channeld = elem->channel_data;
   *has_compression_algorithm = false;
-  /* Parse incoming request for compression. If any, it'll be available
-   * at calld->compression_algorithm */
-  if (initial_metadata->idx.named.grpc_internal_encoding_request != NULL) {
+  grpc_stream_compression_algorithm stream_compression_algorithm;
+  if (initial_metadata->idx.named.grpc_internal_stream_encoding_request !=
+      NULL) {
     grpc_mdelem md =
-        initial_metadata->idx.named.grpc_internal_encoding_request->md;
-    if (!grpc_compression_algorithm_parse(GRPC_MDVALUE(md),
-                                          &calld->compression_algorithm)) {
+        initial_metadata->idx.named.grpc_internal_stream_encoding_request->md;
+    if (!grpc_stream_compression_algorithm_parse(
+            GRPC_MDVALUE(md), &stream_compression_algorithm)) {
       char *val = grpc_slice_to_c_string(GRPC_MDVALUE(md));
       gpr_log(GPR_ERROR,
               "Invalid compression algorithm: '%s' (unknown). Ignoring.", val);
       gpr_free(val);
-      calld->compression_algorithm = GRPC_COMPRESS_NONE;
+      stream_compression_algorithm = GRPC_STREAM_COMPRESS_NONE;
     }
-    if (!GPR_BITGET(channeld->enabled_algorithms_bitset,
-                    calld->compression_algorithm)) {
+    if (!GPR_BITGET(channeld->enabled_stream_compression_algorithms_bitset,
+                    stream_compression_algorithm)) {
       char *val = grpc_slice_to_c_string(GRPC_MDVALUE(md));
       gpr_log(GPR_ERROR,
               "Invalid compression algorithm: '%s' (previously disabled). "
               "Ignoring.",
               val);
       gpr_free(val);
+      stream_compression_algorithm = GRPC_STREAM_COMPRESS_NONE;
+    }
+    *has_compression_algorithm = true;
+    grpc_metadata_batch_remove(
+        exec_ctx, initial_metadata,
+        initial_metadata->idx.named.grpc_internal_stream_encoding_request);
+    /* Disable message-wise compression */
+    calld->compression_algorithm = GRPC_COMPRESS_NONE;
+    if (initial_metadata->idx.named.grpc_internal_encoding_request != NULL) {
+      grpc_metadata_batch_remove(
+          exec_ctx, initial_metadata,
+          initial_metadata->idx.named.grpc_internal_encoding_request);
+    }
+  } else if (initial_metadata->idx.named.grpc_internal_encoding_request !=
+             NULL) {
+    grpc_mdelem md =
+        initial_metadata->idx.named.grpc_internal_encoding_request->md;
+    if (!grpc_compression_algorithm_parse(GRPC_MDVALUE(md),
+                                          &calld->compression_algorithm)) {
+      char *val = grpc_slice_to_c_string(GRPC_MDVALUE(md));
+      gpr_log(GPR_ERROR,
+              "Invalid compression algorithm: '%s' (unknown). Ignoring.", val);
+      gpr_free(val);
       calld->compression_algorithm = GRPC_COMPRESS_NONE;
     }
     *has_compression_algorithm = true;
-
     grpc_metadata_batch_remove(
         exec_ctx, initial_metadata,
         initial_metadata->idx.named.grpc_internal_encoding_request);
@@ -141,13 +172,25 @@ static grpc_error *process_send_initial_metadata(
     /* If no algorithm was found in the metadata and we aren't
      * exceptionally skipping compression, fall back to the channel
      * default */
-    calld->compression_algorithm = channeld->default_compression_algorithm;
+    if (channeld->default_stream_compression_algorithm !=
+        GRPC_STREAM_COMPRESS_NONE) {
+      stream_compression_algorithm =
+          channeld->default_stream_compression_algorithm;
+      calld->compression_algorithm = GRPC_COMPRESS_NONE;
+    } else {
+      calld->compression_algorithm = channeld->default_compression_algorithm;
+    }
     *has_compression_algorithm = true;
   }
 
   grpc_error *error = GRPC_ERROR_NONE;
   /* hint compression algorithm */
-  if (calld->compression_algorithm != GRPC_COMPRESS_NONE) {
+  if (stream_compression_algorithm != GRPC_STREAM_COMPRESS_NONE) {
+    error = grpc_metadata_batch_add_tail(
+        exec_ctx, initial_metadata,
+        &calld->stream_compression_algorithm_storage,
+        grpc_stream_compression_encoding_mdelem(stream_compression_algorithm));
+  } else if (calld->compression_algorithm != GRPC_COMPRESS_NONE) {
     error = grpc_metadata_batch_add_tail(
         exec_ctx, initial_metadata, &calld->compression_algorithm_storage,
         grpc_compression_encoding_mdelem(calld->compression_algorithm));
@@ -161,6 +204,13 @@ static grpc_error *process_send_initial_metadata(
       GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(
           channeld->supported_compression_algorithms));
 
+  if (error != GRPC_ERROR_NONE) return error;
+
+  error = grpc_metadata_batch_add_tail(
+      exec_ctx, initial_metadata, &calld->accept_stream_encoding_storage,
+      GRPC_MDELEM_ACCEPT_STREAM_ENCODING_FOR_ALGORITHMS(
+          channeld->supported_stream_compression_algorithms));
+
   return error;
 }
 
@@ -401,6 +451,7 @@ static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
                                      grpc_channel_element_args *args) {
   channel_data *channeld = elem->channel_data;
 
+  /* Configuration for message-wise compression */
   channeld->enabled_algorithms_bitset =
       grpc_channel_args_compression_algorithm_get_states(args->channel_args);
 
@@ -415,16 +466,32 @@ static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
     channeld->default_compression_algorithm = GRPC_COMPRESS_NONE;
   }
 
-  channeld->supported_compression_algorithms = 1; /* always support identity */
-  for (grpc_compression_algorithm algo_idx = 1;
-       algo_idx < GRPC_COMPRESS_ALGORITHMS_COUNT; ++algo_idx) {
-    /* skip disabled algorithms */
-    if (!GPR_BITGET(channeld->enabled_algorithms_bitset, algo_idx)) {
-      continue;
-    }
-    channeld->supported_compression_algorithms |= 1u << algo_idx;
+  channeld->supported_compression_algorithms =
+      (((1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1) &
+       channeld->enabled_algorithms_bitset) |
+      1u;
+
+  /* Configuration for stream compression */
+  channeld->enabled_stream_compression_algorithms_bitset =
+      grpc_channel_args_stream_compression_algorithm_get_states(
+          args->channel_args);
+
+  channeld->default_stream_compression_algorithm =
+      grpc_channel_args_get_stream_compression_algorithm(args->channel_args);
+
+  if (!GPR_BITGET(channeld->enabled_stream_compression_algorithms_bitset,
+                  channeld->default_stream_compression_algorithm)) {
+    gpr_log(GPR_DEBUG,
+            "stream compression algorithm %d not enabled: switching to none",
+            channeld->default_stream_compression_algorithm);
+    channeld->default_stream_compression_algorithm = GRPC_STREAM_COMPRESS_NONE;
   }
 
+  channeld->supported_stream_compression_algorithms =
+      (((1u << GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT) - 1) &
+       channeld->enabled_stream_compression_algorithms_bitset) |
+      1u;
+
   GPR_ASSERT(!args->is_last);
   return GRPC_ERROR_NONE;
 }

src/core/lib/channel/channel_args.c

@@ -221,6 +221,21 @@ grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
   return GRPC_COMPRESS_NONE;
 }
 
+grpc_stream_compression_algorithm
+grpc_channel_args_get_stream_compression_algorithm(const grpc_channel_args *a) {
+  size_t i;
+  if (a == NULL) return 0;
+  for (i = 0; i < a->num_args; ++i) {
+    if (a->args[i].type == GRPC_ARG_INTEGER &&
+        !strcmp(GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM,
+                a->args[i].key)) {
+      return (grpc_stream_compression_algorithm)a->args[i].value.integer;
+      break;
+    }
+  }
+  return GRPC_STREAM_COMPRESS_NONE;
+}
+
 grpc_channel_args *grpc_channel_args_set_compression_algorithm(
     grpc_channel_args *a, grpc_compression_algorithm algorithm) {
   GPR_ASSERT(algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT);
@@ -231,6 +246,16 @@ grpc_channel_args *grpc_channel_args_set_compression_algorithm(
   return grpc_channel_args_copy_and_add(a, &tmp, 1);
 }
 
+grpc_channel_args *grpc_channel_args_set_stream_compression_algorithm(
+    grpc_channel_args *a, grpc_stream_compression_algorithm algorithm) {
+  GPR_ASSERT(algorithm < GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT);
+  grpc_arg tmp;
+  tmp.type = GRPC_ARG_INTEGER;
+  tmp.key = GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM;
+  tmp.value.integer = algorithm;
+  return grpc_channel_args_copy_and_add(a, &tmp, 1);
+}
+
 /** Returns 1 if the argument for compression algorithm's enabled states bitset
  * was found in \a a, returning the arg's value in \a states. Otherwise, returns
  * 0. */
@@ -251,6 +276,26 @@ static int find_compression_algorithm_states_bitset(const grpc_channel_args *a,
   return 0; /* GPR_FALSE */
 }
 
+/** Returns 1 if the argument for compression algorithm's enabled states bitset
+ * was found in \a a, returning the arg's value in \a states. Otherwise, returns
+ * 0. */
+static int find_stream_compression_algorithm_states_bitset(
+    const grpc_channel_args *a, int **states_arg) {
+  if (a != NULL) {
+    size_t i;
+    for (i = 0; i < a->num_args; ++i) {
+      if (a->args[i].type == GRPC_ARG_INTEGER &&
+          !strcmp(GRPC_STREAM_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET,
+                  a->args[i].key)) {
+        *states_arg = &a->args[i].value.integer;
+        **states_arg |= 0x1; /* forcefully enable support for no compression */
+        return 1;
+      }
+    }
+  }
+  return 0; /* GPR_FALSE */
+}
+
 grpc_channel_args *grpc_channel_args_compression_algorithm_set_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_args **a,
     grpc_compression_algorithm algorithm, int state) {
@@ -292,6 +337,48 @@ grpc_channel_args *grpc_channel_args_compression_algorithm_set_state(
   return result;
 }
 
+grpc_channel_args *grpc_channel_args_stream_compression_algorithm_set_state(
+    grpc_exec_ctx *exec_ctx, grpc_channel_args **a,
+    grpc_stream_compression_algorithm algorithm, int state) {
+  int *states_arg = NULL;
+  grpc_channel_args *result = *a;
+  const int states_arg_found =
+      find_stream_compression_algorithm_states_bitset(*a, &states_arg);
+
+  if (grpc_channel_args_get_stream_compression_algorithm(*a) == algorithm &&
+      state == 0) {
+    char *algo_name = NULL;
+    GPR_ASSERT(grpc_stream_compression_algorithm_name(algorithm, &algo_name) !=
+               0);
+    gpr_log(GPR_ERROR,
+            "Tried to disable default stream compression algorithm '%s'. The "
+            "operation has been ignored.",
+            algo_name);
+  } else if (states_arg_found) {
+    if (state != 0) {
+      GPR_BITSET((unsigned *)states_arg, algorithm);
+    } else if (algorithm != GRPC_STREAM_COMPRESS_NONE) {
+      GPR_BITCLEAR((unsigned *)states_arg, algorithm);
+    }
+  } else {
+    /* create a new arg */
+    grpc_arg tmp;
+    tmp.type = GRPC_ARG_INTEGER;
+    tmp.key = GRPC_STREAM_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET;
+    /* all enabled by default */
+    tmp.value.integer = (1u << GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT) - 1;
+    if (state != 0) {
+      GPR_BITSET((unsigned *)&tmp.value.integer, algorithm);
+    } else if (algorithm != GRPC_STREAM_COMPRESS_NONE) {
+      GPR_BITCLEAR((unsigned *)&tmp.value.integer, algorithm);
+    }
+    result = grpc_channel_args_copy_and_add(*a, &tmp, 1);
+    grpc_channel_args_destroy(exec_ctx, *a);
+    *a = result;
+  }
+  return result;
+}
+
 uint32_t grpc_channel_args_compression_algorithm_get_states(
     const grpc_channel_args *a) {
   int *states_arg;
@@ -302,6 +389,17 @@ uint32_t grpc_channel_args_compression_algorithm_get_states(
   }
 }
 
+uint32_t grpc_channel_args_stream_compression_algorithm_get_states(
+    const grpc_channel_args *a) {
+  int *states_arg;
+  if (find_stream_compression_algorithm_states_bitset(a, &states_arg)) {
+    return (uint32_t)*states_arg;
+  } else {
+    return (1u << GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT) -
+           1; /* All algs. enabled */
+  }
+}
+
 grpc_channel_args *grpc_channel_args_set_socket_mutator(
     grpc_channel_args *a, grpc_socket_mutator *mutator) {
   grpc_arg tmp = grpc_socket_mutator_to_arg(mutator);

src/core/lib/channel/channel_args.h

@@ -59,12 +59,24 @@ void grpc_channel_args_destroy(grpc_exec_ctx *exec_ctx, grpc_channel_args *a);
 grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
     const grpc_channel_args *a);
 
+/** Returns the stream compression algorithm set in \a a. */
+grpc_stream_compression_algorithm
+grpc_channel_args_get_stream_compression_algorithm(const grpc_channel_args *a);
+
 /** Returns a channel arg instance with compression enabled. If \a a is
  * non-NULL, its args are copied. N.B. GRPC_COMPRESS_NONE disables compression
  * for the channel. */
 grpc_channel_args *grpc_channel_args_set_compression_algorithm(
     grpc_channel_args *a, grpc_compression_algorithm algorithm);
 
+/** Returns a channel arg instance with stream compression enabled. If \a a is
+ * non-NULL, its args are copied. N.B. GRPC_STREAM_COMPRESS_NONE disables
+ * stream compression for the channel. If a value other than
+ * GRPC_STREAM_COMPRESS_NONE is set, it takes precedence over message-wise
+ * compression algorithms. */
+grpc_channel_args *grpc_channel_args_set_stream_compression_algorithm(
+    grpc_channel_args *a, grpc_stream_compression_algorithm algorithm);
+
 /** Sets the support for the given compression algorithm. By default, all
  * compression algorithms are enabled. It's an error to disable an algorithm set
  * by grpc_channel_args_set_compression_algorithm.
@@ -76,6 +88,17 @@ grpc_channel_args *grpc_channel_args_compression_algorithm_set_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_args **a,
     grpc_compression_algorithm algorithm, int enabled);
 
+/** Sets the support for the given stream compression algorithm. By default, all
+ * stream compression algorithms are enabled. It's an error to disable an
+ * algorithm set by grpc_channel_args_set_stream_compression_algorithm.
+ *
+ * Returns an instance with the updated algorithm states. The \a a pointer is
+ * modified to point to the returned instance (which may be different from the
+ * input value of \a a). */
+grpc_channel_args *grpc_channel_args_stream_compression_algorithm_set_state(
+    grpc_exec_ctx *exec_ctx, grpc_channel_args **a,
+    grpc_stream_compression_algorithm algorithm, int enabled);
+
 /** Returns the bitset representing the support state (true for enabled, false
  * for disabled) for compression algorithms.
  *
@@ -84,6 +107,14 @@ grpc_channel_args *grpc_channel_args_compression_algorithm_set_state(
 uint32_t grpc_channel_args_compression_algorithm_get_states(
     const grpc_channel_args *a);
 
+/** Returns the bitset representing the support state (true for enabled, false
+ * for disabled) for stream compression algorithms.
+ *
+ * The i-th bit of the returned bitset corresponds to the i-th entry in the
+ * grpc_stream_compression_algorithm enum. */
+uint32_t grpc_channel_args_stream_compression_algorithm_get_states(
+    const grpc_channel_args *a);
+
 int grpc_channel_args_compare(const grpc_channel_args *a,
                               const grpc_channel_args *b);
 

src/core/lib/compression/algorithm_metadata.h

@@ -26,13 +26,27 @@
 grpc_slice grpc_compression_algorithm_slice(
     grpc_compression_algorithm algorithm);
 
+/** Return stream compression algorithm based metadata value */
+grpc_slice grpc_stream_compression_algorithm_slice(
+    grpc_stream_compression_algorithm algorithm);
+
 /** Return compression algorithm based metadata element (grpc-encoding: xxx) */
 grpc_mdelem grpc_compression_encoding_mdelem(
     grpc_compression_algorithm algorithm);
 
+/** Return stream compression algorithm based metadata element
+ * (content-encoding: xxx) */
+grpc_mdelem grpc_stream_compression_encoding_mdelem(
+    grpc_stream_compression_algorithm algorithm);
+
 /** Find compression algorithm based on passed in mdstr - returns
  * GRPC_COMPRESS_ALGORITHM_COUNT on failure */
 grpc_compression_algorithm grpc_compression_algorithm_from_slice(
     grpc_slice str);
 
+/** Find stream compression algorithm based on passed in mdstr - returns
+ * GRPC_STREAM_COMPRESS_ALGORITHM_COUNT on failure */
+grpc_stream_compression_algorithm grpc_stream_compression_algorithm_from_slice(
+    grpc_slice str);
+
 #endif /* GRPC_CORE_LIB_COMPRESSION_ALGORITHM_METADATA_H */

src/core/lib/compression/compression.c

@@ -46,6 +46,19 @@ int grpc_compression_algorithm_parse(grpc_slice name,
   }
 }
 
+int grpc_stream_compression_algorithm_parse(
+    grpc_slice name, grpc_stream_compression_algorithm *algorithm) {
+  if (grpc_slice_eq(name, GRPC_MDSTR_IDENTITY)) {
+    *algorithm = GRPC_STREAM_COMPRESS_NONE;
+    return 1;
+  } else if (grpc_slice_eq(name, GRPC_MDSTR_GZIP)) {
+    *algorithm = GRPC_STREAM_COMPRESS_GZIP;
+    return 1;
+  } else {
+    return 0;
+  }
+}
+
 int grpc_compression_algorithm_name(grpc_compression_algorithm algorithm,
                                     char **name) {
   GRPC_API_TRACE("grpc_compression_algorithm_parse(algorithm=%d, name=%p)", 2,
@@ -66,6 +79,24 @@ int grpc_compression_algorithm_name(grpc_compression_algorithm algorithm,
   return 0;
 }
 
+int grpc_stream_compression_algorithm_name(
+    grpc_stream_compression_algorithm algorithm, char **name) {
+  GRPC_API_TRACE(
+      "grpc_stream_compression_algorithm_parse(algorithm=%d, name=%p)", 2,
+      ((int)algorithm, name));
+  switch (algorithm) {
+    case GRPC_STREAM_COMPRESS_NONE:
+      *name = "identity";
+      return 1;
+    case GRPC_STREAM_COMPRESS_GZIP:
+      *name = "gzip";
+      return 1;
+    case GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT:
+      return 0;
+  }
+  return 0;
+}
+
 grpc_compression_algorithm grpc_compression_algorithm_from_slice(
     grpc_slice str) {
   if (grpc_slice_eq(str, GRPC_MDSTR_IDENTITY)) return GRPC_COMPRESS_NONE;
@@ -74,6 +105,13 @@ grpc_compression_algorithm grpc_compression_algorithm_from_slice(
   return GRPC_COMPRESS_ALGORITHMS_COUNT;
 }
 
+grpc_stream_compression_algorithm grpc_stream_compression_algorithm_from_slice(
+    grpc_slice str) {
+  if (grpc_slice_eq(str, GRPC_MDSTR_IDENTITY)) return GRPC_STREAM_COMPRESS_NONE;
+  if (grpc_slice_eq(str, GRPC_MDSTR_GZIP)) return GRPC_STREAM_COMPRESS_GZIP;
+  return GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT;
+}
+
 grpc_slice grpc_compression_algorithm_slice(
     grpc_compression_algorithm algorithm) {
   switch (algorithm) {
@@ -89,6 +127,19 @@ grpc_slice grpc_compression_algorithm_slice(
   return grpc_empty_slice();
 }
 
+grpc_slice grpc_stream_compression_algorithm_slice(
+    grpc_stream_compression_algorithm algorithm) {
+  switch (algorithm) {
+    case GRPC_STREAM_COMPRESS_NONE:
+      return GRPC_MDSTR_IDENTITY;
+    case GRPC_STREAM_COMPRESS_GZIP:
+      return GRPC_MDSTR_GZIP;
+    case GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT:
+      return grpc_empty_slice();
+  }
+  return grpc_empty_slice();
+}
+
 grpc_mdelem grpc_compression_encoding_mdelem(
     grpc_compression_algorithm algorithm) {
   switch (algorithm) {
@@ -104,6 +155,19 @@ grpc_mdelem grpc_compression_encoding_mdelem(
   return GRPC_MDNULL;
 }
 
+grpc_mdelem grpc_stream_compression_encoding_mdelem(
+    grpc_stream_compression_algorithm algorithm) {
+  switch (algorithm) {
+    case GRPC_STREAM_COMPRESS_NONE:
+      return GRPC_MDELEM_CONTENT_ENCODING_IDENTITY;
+    case GRPC_STREAM_COMPRESS_GZIP:
+      return GRPC_MDELEM_CONTENT_ENCODING_GZIP;
+    default:
+      break;
+  }
+  return GRPC_MDNULL;
+}
+
 void grpc_compression_options_init(grpc_compression_options *opts) {
   memset(opts, 0, sizeof(*opts));
   /* all enabled by default */
@@ -126,6 +190,13 @@ int grpc_compression_options_is_algorithm_enabled(
   return GPR_BITGET(opts->enabled_algorithms_bitset, algorithm);
 }
 
+int grpc_compression_options_is_stream_compression_algorithm_enabled(
+    const grpc_compression_options *opts,
+    grpc_stream_compression_algorithm algorithm) {
+  return GPR_BITGET(opts->enabled_stream_compression_algorithms_bitset,
+                    algorithm);
+}
+
 /* TODO(dgq): Add the ability to specify parameters to the individual
  * compression algorithms */
 grpc_compression_algorithm grpc_compression_algorithm_for_level(
@@ -181,3 +252,30 @@ grpc_compression_algorithm grpc_compression_algorithm_for_level(
       abort();
   };
 }
+
+GRPCAPI grpc_stream_compression_algorithm
+grpc_stream_compression_algorithm_for_level(
+    grpc_stream_compression_level level, uint32_t accepted_stream_encodings) {
+  GRPC_API_TRACE("grpc_stream_compression_algorithm_for_level(level=%d)", 1,
+                 ((int)level));
+  if (level > GRPC_STREAM_COMPRESS_LEVEL_HIGH) {
+    gpr_log(GPR_ERROR, "Unknown compression level %d.", (int)level);
+    abort();
+  }
+
+  switch (level) {
+    case GRPC_STREAM_COMPRESS_LEVEL_NONE:
+      return GRPC_STREAM_COMPRESS_NONE;
+    case GRPC_STREAM_COMPRESS_LEVEL_LOW:
+    case GRPC_STREAM_COMPRESS_LEVEL_MED:
+    case GRPC_STREAM_COMPRESS_LEVEL_HIGH:
+      if (GPR_BITGET(accepted_stream_encodings, GRPC_STREAM_COMPRESS_GZIP) ==
+          1) {
+        return GRPC_STREAM_COMPRESS_GZIP;
+      } else {
+        return GRPC_STREAM_COMPRESS_NONE;
+      }
+    default:
+      abort();
+  }
+}

src/core/lib/surface/call.c

@@ -192,8 +192,12 @@ struct grpc_call {
 
   /* Compression algorithm for *incoming* data */
   grpc_compression_algorithm incoming_compression_algorithm;
+  /* Stream compression algorithm for *incoming* data */
+  grpc_stream_compression_algorithm incoming_stream_compression_algorithm;
   /* Supported encodings (compression algorithms), a bitset */
   uint32_t encodings_accepted_by_peer;
+  /* Supported stream encodings (stream compression algorithms), a bitset */
+  uint32_t stream_encodings_accepted_by_peer;
 
   /* Contexts for various subsystems (security, tracing, ...). */
   grpc_call_context_element context[GRPC_CONTEXT_COUNT];
@@ -748,6 +752,12 @@ static void set_incoming_compression_algorithm(
   call->incoming_compression_algorithm = algo;
 }
 
+static void set_incoming_stream_compression_algorithm(
+    grpc_call *call, grpc_stream_compression_algorithm algo) {
+  GPR_ASSERT(algo < GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT);
+  call->incoming_stream_compression_algorithm = algo;
+}
+
 grpc_compression_algorithm grpc_call_test_only_get_compression_algorithm(
     grpc_call *call) {
   grpc_compression_algorithm algorithm;
@@ -761,6 +771,13 @@ static grpc_compression_algorithm compression_algorithm_for_level_locked(
                                               call->encodings_accepted_by_peer);
 }
 
+static grpc_stream_compression_algorithm
+stream_compression_algorithm_for_level_locked(
+    grpc_call *call, grpc_stream_compression_level level) {
+  return grpc_stream_compression_algorithm_for_level(
+      level, call->stream_encodings_accepted_by_peer);
+}
+
 uint32_t grpc_call_test_only_get_message_flags(grpc_call *call) {
   uint32_t flags;
   flags = call->test_only_last_message_flags;
@@ -815,12 +832,70 @@ static void set_encodings_accepted_by_peer(grpc_exec_ctx *exec_ctx,
       (void *)(((uintptr_t)call->encodings_accepted_by_peer) + 1));
 }
 
+static void set_stream_encodings_accepted_by_peer(grpc_exec_ctx *exec_ctx,
+                                                  grpc_call *call,
+                                                  grpc_mdelem mdel) {
+  size_t i;
+  grpc_stream_compression_algorithm algorithm;
+  grpc_slice_buffer accept_encoding_parts;
+  grpc_slice accept_encoding_slice;
+  void *accepted_user_data;
+
+  accepted_user_data =
+      grpc_mdelem_get_user_data(mdel, destroy_encodings_accepted_by_peer);
+  if (accepted_user_data != NULL) {
+    call->stream_encodings_accepted_by_peer =
+        (uint32_t)(((uintptr_t)accepted_user_data) - 1);
+    return;
+  }
+
+  accept_encoding_slice = GRPC_MDVALUE(mdel);
+  grpc_slice_buffer_init(&accept_encoding_parts);
+  grpc_slice_split(accept_encoding_slice, ",", &accept_encoding_parts);
+
+  /* Always support no compression */
+  GPR_BITSET(&call->stream_encodings_accepted_by_peer,
+             GRPC_STREAM_COMPRESS_NONE);
+  for (i = 0; i < accept_encoding_parts.count; i++) {
+    grpc_slice accept_encoding_entry_slice = accept_encoding_parts.slices[i];
+    if (grpc_stream_compression_algorithm_parse(accept_encoding_entry_slice,
+                                                &algorithm)) {
+      GPR_BITSET(&call->stream_encodings_accepted_by_peer, algorithm);
+    } else {
+      char *accept_encoding_entry_str =
+          grpc_slice_to_c_string(accept_encoding_entry_slice);
+      gpr_log(GPR_ERROR,
+              "Invalid entry in accept encoding metadata: '%s'. Ignoring.",
+              accept_encoding_entry_str);
+      gpr_free(accept_encoding_entry_str);
+    }
+  }
+
+  grpc_slice_buffer_destroy_internal(exec_ctx, &accept_encoding_parts);
+
+  grpc_mdelem_set_user_data(
+      mdel, destroy_encodings_accepted_by_peer,
+      (void *)(((uintptr_t)call->stream_encodings_accepted_by_peer) + 1));
+}
+
 uint32_t grpc_call_test_only_get_encodings_accepted_by_peer(grpc_call *call) {
   uint32_t encodings_accepted_by_peer;
   encodings_accepted_by_peer = call->encodings_accepted_by_peer;
   return encodings_accepted_by_peer;
 }
 
+uint32_t grpc_call_test_only_get_stream_encodings_accepted_by_peer(
+    grpc_call *call) {
+  uint32_t stream_encodings_accepted_by_peer;
+  stream_encodings_accepted_by_peer = call->stream_encodings_accepted_by_peer;
+  return stream_encodings_accepted_by_peer;
+}
+
+grpc_stream_compression_algorithm
+grpc_call_test_only_get_incoming_stream_encodings(grpc_call *call) {
+  return call->incoming_stream_compression_algorithm;
+}
+
 static grpc_linked_mdelem *linked_from_md(grpc_metadata *md) {
   return (grpc_linked_mdelem *)&md->internal_data;
 }
@@ -929,6 +1004,22 @@ static grpc_compression_algorithm decode_compression(grpc_mdelem md) {
   return algorithm;
 }
 
+static grpc_stream_compression_algorithm decode_stream_compression(
+    grpc_mdelem md) {
+  grpc_stream_compression_algorithm algorithm =
+      grpc_stream_compression_algorithm_from_slice(GRPC_MDVALUE(md));
+  if (algorithm == GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT) {
+    char *md_c_str = grpc_slice_to_c_string(GRPC_MDVALUE(md));
+    gpr_log(GPR_ERROR,
+            "Invalid incoming stream compression algorithm: '%s'. Interpreting "
+            "incoming data as uncompressed.",
+            md_c_str);
+    gpr_free(md_c_str);
+    return GRPC_STREAM_COMPRESS_NONE;
+  }
+  return algorithm;
+}
+
 static void publish_app_metadata(grpc_call *call, grpc_metadata_batch *b,
                                  int is_trailing) {
   if (b->list.count == 0) return;
@@ -953,7 +1044,19 @@ static void publish_app_metadata(grpc_call *call, grpc_metadata_batch *b,
 
 static void recv_initial_filter(grpc_exec_ctx *exec_ctx, grpc_call *call,
                                 grpc_metadata_batch *b) {
-  if (b->idx.named.grpc_encoding != NULL) {
+  if (b->idx.named.content_encoding != NULL) {
+    if (b->idx.named.grpc_encoding != NULL) {
+      gpr_log(GPR_ERROR,
+              "Received both content-encoding and grpc-encoding header. "
+              "Ignoring grpc-encoding.");
+      grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_encoding);
+    }
+    GPR_TIMER_BEGIN("incoming_stream_compression_algorithm", 0);
+    set_incoming_stream_compression_algorithm(
+        call, decode_stream_compression(b->idx.named.content_encoding->md));
+    GPR_TIMER_END("incoming_stream_compression_algorithm", 0);
+    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.content_encoding);
+  } else if (b->idx.named.grpc_encoding != NULL) {
     GPR_TIMER_BEGIN("incoming_compression_algorithm", 0);
     set_incoming_compression_algorithm(
         call, decode_compression(b->idx.named.grpc_encoding->md));
@@ -967,6 +1070,13 @@ static void recv_initial_filter(grpc_exec_ctx *exec_ctx, grpc_call *call,
     grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_accept_encoding);
     GPR_TIMER_END("encodings_accepted_by_peer", 0);
   }
+  if (b->idx.named.accept_encoding != NULL) {
+    GPR_TIMER_BEGIN("stream_encodings_accepted_by_peer", 0);
+    set_stream_encodings_accepted_by_peer(exec_ctx, call,
+                                          b->idx.named.accept_encoding->md);
+    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.accept_encoding);
+    GPR_TIMER_END("stream_encodings_accepted_by_peer", 0);
+  }
   publish_app_metadata(call, b, false);
 }
 
@@ -1294,8 +1404,49 @@ static void receiving_stream_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
 static void validate_filtered_metadata(grpc_exec_ctx *exec_ctx,
                                        batch_control *bctl) {
   grpc_call *call = bctl->call;
-  /* validate call->incoming_compression_algorithm */
-  if (call->incoming_compression_algorithm != GRPC_COMPRESS_NONE) {
+  /* validate compression algorithms */
+  if (call->incoming_stream_compression_algorithm !=
+      GRPC_STREAM_COMPRESS_NONE) {
+    const grpc_stream_compression_algorithm algo =
+        call->incoming_stream_compression_algorithm;
+    char *error_msg = NULL;
+    const grpc_compression_options compression_options =
+        grpc_channel_compression_options(call->channel);
+    if (algo >= GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT) {
+      gpr_asprintf(&error_msg,
+                   "Invalid stream compression algorithm value '%d'.", algo);
+      gpr_log(GPR_ERROR, "%s", error_msg);
+      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
+                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+    } else if (grpc_compression_options_is_stream_compression_algorithm_enabled(
+                   &compression_options, algo) == 0) {
+      /* check if algorithm is supported by current channel config */
+      char *algo_name = NULL;
+      grpc_stream_compression_algorithm_name(algo, &algo_name);
+      gpr_asprintf(&error_msg, "Stream compression algorithm '%s' is disabled.",
+                   algo_name);
+      gpr_log(GPR_ERROR, "%s", error_msg);
+      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
+                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+    }
+    gpr_free(error_msg);
+
+    GPR_ASSERT(call->stream_encodings_accepted_by_peer != 0);
+    if (!GPR_BITGET(call->stream_encodings_accepted_by_peer,
+                    call->incoming_stream_compression_algorithm)) {
+      if (GRPC_TRACER_ON(grpc_compression_trace)) {
+        char *algo_name = NULL;
+        grpc_stream_compression_algorithm_name(
+            call->incoming_stream_compression_algorithm, &algo_name);
+        gpr_log(
+            GPR_ERROR,
+            "Stream compression algorithm (content-encoding = '%s') not "
+            "present in the bitset of accepted encodings (accept-encodings: "
+            "'0x%x')",
+            algo_name, call->stream_encodings_accepted_by_peer);
+      }
+    }
+  } else if (call->incoming_compression_algorithm != GRPC_COMPRESS_NONE) {
     const grpc_compression_algorithm algo =
         call->incoming_compression_algorithm;
     char *error_msg = NULL;
@@ -1322,22 +1473,20 @@ static void validate_filtered_metadata(grpc_exec_ctx *exec_ctx,
       call->incoming_compression_algorithm = algo;
     }
     gpr_free(error_msg);
-  }
 
-  /* make sure the received grpc-encoding is amongst the ones listed in
-   * grpc-accept-encoding */
-  GPR_ASSERT(call->encodings_accepted_by_peer != 0);
-  if (!GPR_BITGET(call->encodings_accepted_by_peer,
-                  call->incoming_compression_algorithm)) {
-    if (GRPC_TRACER_ON(grpc_compression_trace)) {
-      char *algo_name = NULL;
-      grpc_compression_algorithm_name(call->incoming_compression_algorithm,
-                                      &algo_name);
-      gpr_log(GPR_ERROR,
-              "Compression algorithm (grpc-encoding = '%s') not present in "
-              "the bitset of accepted encodings (grpc-accept-encodings: "
-              "'0x%x')",
-              algo_name, call->encodings_accepted_by_peer);
+    GPR_ASSERT(call->encodings_accepted_by_peer != 0);
+    if (!GPR_BITGET(call->encodings_accepted_by_peer,
+                    call->incoming_compression_algorithm)) {
+      if (GRPC_TRACER_ON(grpc_compression_trace)) {
+        char *algo_name = NULL;
+        grpc_compression_algorithm_name(call->incoming_compression_algorithm,
+                                        &algo_name);
+        gpr_log(GPR_ERROR,
+                "Compression algorithm (grpc-encoding = '%s') not present in "
+                "the bitset of accepted encodings (grpc-accept-encodings: "
+                "'0x%x')",
+                algo_name, call->encodings_accepted_by_peer);
+      }
     }
   }
 }
@@ -1464,29 +1613,56 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         /* process compression level */
         memset(&compression_md, 0, sizeof(compression_md));
         size_t additional_metadata_count = 0;
-        grpc_compression_level effective_compression_level;
+        grpc_compression_level effective_compression_level = GRPC_COMPRESS_NONE;
+        grpc_stream_compression_level effective_stream_compression_level =
+            GRPC_STREAM_COMPRESS_NONE;
         bool level_set = false;
-        if (op->data.send_initial_metadata.maybe_compression_level.is_set) {
+        bool stream_compression = false;
+        if (op->data.send_initial_metadata.maybe_stream_compression_level
+                .is_set) {
+          effective_compression_level =
+              op->data.send_initial_metadata.maybe_stream_compression_level
+                  .level;
+          level_set = true;
+          stream_compression = true;
+        } else if (op->data.send_initial_metadata.maybe_compression_level
+                       .is_set) {
           effective_compression_level =
               op->data.send_initial_metadata.maybe_compression_level.level;
           level_set = true;
         } else {
           const grpc_compression_options copts =
               grpc_channel_compression_options(call->channel);
-          level_set = copts.default_level.is_set;
-          if (level_set) {
+          if (copts.default_stream_compression_level.is_set) {
+            level_set = true;
+            effective_stream_compression_level =
+                copts.default_stream_compression_level.level;
+            stream_compression = true;
+          } else if (copts.default_level.is_set) {
+            level_set = true;
             effective_compression_level = copts.default_level.level;
           }
         }
         if (level_set && !call->is_client) {
-          const grpc_compression_algorithm calgo =
-              compression_algorithm_for_level_locked(
-                  call, effective_compression_level);
-          // the following will be picked up by the compress filter and used as
-          // the call's compression algorithm.
-          compression_md.key = GRPC_MDSTR_GRPC_INTERNAL_ENCODING_REQUEST;
-          compression_md.value = grpc_compression_algorithm_slice(calgo);
-          additional_metadata_count++;
+          if (stream_compression) {
+            const grpc_stream_compression_algorithm calgo =
+                stream_compression_algorithm_for_level_locked(
+                    call, effective_stream_compression_level);
+            compression_md.key =
+                GRPC_MDSTR_GRPC_INTERNAL_STREAM_ENCODING_REQUEST;
+            compression_md.value =
+                grpc_stream_compression_algorithm_slice(calgo);
+          } else {
+            const grpc_compression_algorithm calgo =
+                compression_algorithm_for_level_locked(
+                    call, effective_compression_level);
+            // the following will be picked up by the compress filter and used
+            // as
+            // the call's compression algorithm.
+            compression_md.key = GRPC_MDSTR_GRPC_INTERNAL_ENCODING_REQUEST;
+            compression_md.value = grpc_compression_algorithm_slice(calgo);
+            additional_metadata_count++;
+          }
         }
 
         if (op->data.send_initial_metadata.count + additional_metadata_count >

src/core/lib/surface/call_test_only.h

@@ -42,6 +42,18 @@ uint32_t grpc_call_test_only_get_message_flags(grpc_call *call);
  * To be indexed by grpc_compression_algorithm enum values. */
 uint32_t grpc_call_test_only_get_encodings_accepted_by_peer(grpc_call *call);
 
+/** Returns a bitset for the stream encodings (stream compression algorithms)
+ * supported by \a call's peer.
+ *
+ * To be indexed by grpc_stream_compression_algorithm enum values. */
+uint32_t grpc_call_test_only_get_stream_encodings_accepted_by_peer(
+    grpc_call *call);
+
+/** Returns the incoming stream compression algorithm (content-encoding header)
+ * received by a call. */
+grpc_stream_compression_algorithm
+grpc_call_test_only_get_incoming_stream_encodings(grpc_call *call);
+
 #ifdef __cplusplus
 }
 #endif

src/core/lib/surface/channel.c

@@ -149,12 +149,31 @@ grpc_channel *grpc_channel_create_with_builder(
               &args->args[i],
               (grpc_integer_options){GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE,
                                      GRPC_COMPRESS_ALGORITHMS_COUNT - 1});
+    } else if (0 == strcmp(args->args[i].key,
+                           GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM)) {
+      channel->compression_options.default_stream_compression_algorithm.is_set =
+          true;
+      channel->compression_options.default_stream_compression_algorithm
+          .algorithm =
+          (grpc_stream_compression_algorithm)grpc_channel_arg_get_integer(
+              &args->args[i],
+              (grpc_integer_options){
+                  GRPC_STREAM_COMPRESS_NONE, GRPC_STREAM_COMPRESS_NONE,
+                  GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT - 1});
     } else if (0 ==
                strcmp(args->args[i].key,
                       GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET)) {
       channel->compression_options.enabled_algorithms_bitset =
           (uint32_t)args->args[i].value.integer |
           0x1; /* always support no compression */
+    } else if (0 ==
+               strcmp(
+                   args->args[i].key,
+                   GRPC_STREAM_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET)) {
+      channel->compression_options
+          .enabled_stream_compression_algorithms_bitset =
+          (uint32_t)args->args[i].value.integer |
+          0x1; /* always support no compression */
     }
   }
 

src/core/lib/transport/static_metadata.c

@@ -40,65 +40,68 @@ static uint8_t g_bytes[] = {
     114, 45,  115, 116, 97,  116, 115, 45,  98,  105, 110, 103, 114, 112, 99,
     45,  116, 97,  103, 115, 45,  98,  105, 110, 103, 114, 112, 99,  45,  116,
     114, 97,  99,  101, 45,  98,  105, 110, 99,  111, 110, 116, 101, 110, 116,
-    45,  116, 121, 112, 101, 103, 114, 112, 99,  45,  105, 110, 116, 101, 114,
-    110, 97,  108, 45,  101, 110, 99,  111, 100, 105, 110, 103, 45,  114, 101,
-    113, 117, 101, 115, 116, 117, 115, 101, 114, 45,  97,  103, 101, 110, 116,
-    104, 111, 115, 116, 108, 98,  45,  116, 111, 107, 101, 110, 103, 114, 112,
-    99,  45,  116, 105, 109, 101, 111, 117, 116, 103, 114, 112, 99,  46,  119,
-    97,  105, 116, 95,  102, 111, 114, 95,  114, 101, 97,  100, 121, 103, 114,
-    112, 99,  46,  116, 105, 109, 101, 111, 117, 116, 103, 114, 112, 99,  46,
-    109, 97,  120, 95,  114, 101, 113, 117, 101, 115, 116, 95,  109, 101, 115,
-    115, 97,  103, 101, 95,  98,  121, 116, 101, 115, 103, 114, 112, 99,  46,
-    109, 97,  120, 95,  114, 101, 115, 112, 111, 110, 115, 101, 95,  109, 101,
-    115, 115, 97,  103, 101, 95,  98,  121, 116, 101, 115, 47,  103, 114, 112,
-    99,  46,  108, 98,  46,  118, 49,  46,  76,  111, 97,  100, 66,  97,  108,
-    97,  110, 99,  101, 114, 47,  66,  97,  108, 97,  110, 99,  101, 76,  111,
-    97,  100, 48,  49,  50,  105, 100, 101, 110, 116, 105, 116, 121, 103, 122,
-    105, 112, 100, 101, 102, 108, 97,  116, 101, 116, 114, 97,  105, 108, 101,
-    114, 115, 97,  112, 112, 108, 105, 99,  97,  116, 105, 111, 110, 47,  103,
-    114, 112, 99,  80,  79,  83,  84,  50,  48,  48,  52,  48,  52,  104, 116,
-    116, 112, 104, 116, 116, 112, 115, 103, 114, 112, 99,  71,  69,  84,  80,
-    85,  84,  47,  47,  105, 110, 100, 101, 120, 46,  104, 116, 109, 108, 50,
-    48,  52,  50,  48,  54,  51,  48,  52,  52,  48,  48,  53,  48,  48,  97,
-    99,  99,  101, 112, 116, 45,  99,  104, 97,  114, 115, 101, 116, 97,  99,
-    99,  101, 112, 116, 45,  101, 110, 99,  111, 100, 105, 110, 103, 103, 122,
-    105, 112, 44,  32,  100, 101, 102, 108, 97,  116, 101, 97,  99,  99,  101,
-    112, 116, 45,  108, 97,  110, 103, 117, 97,  103, 101, 97,  99,  99,  101,
-    112, 116, 45,  114, 97,  110, 103, 101, 115, 97,  99,  99,  101, 112, 116,
-    97,  99,  99,  101, 115, 115, 45,  99,  111, 110, 116, 114, 111, 108, 45,
-    97,  108, 108, 111, 119, 45,  111, 114, 105, 103, 105, 110, 97,  103, 101,
-    97,  108, 108, 111, 119, 97,  117, 116, 104, 111, 114, 105, 122, 97,  116,
-    105, 111, 110, 99,  97,  99,  104, 101, 45,  99,  111, 110, 116, 114, 111,
-    108, 99,  111, 110, 116, 101, 110, 116, 45,  100, 105, 115, 112, 111, 115,
-    105, 116, 105, 111, 110, 99,  111, 110, 116, 101, 110, 116, 45,  101, 110,
-    99,  111, 100, 105, 110, 103, 99,  111, 110, 116, 101, 110, 116, 45,  108,
-    97,  110, 103, 117, 97,  103, 101, 99,  111, 110, 116, 101, 110, 116, 45,
-    108, 101, 110, 103, 116, 104, 99,  111, 110, 116, 101, 110, 116, 45,  108,
-    111, 99,  97,  116, 105, 111, 110, 99,  111, 110, 116, 101, 110, 116, 45,
-    114, 97,  110, 103, 101, 99,  111, 111, 107, 105, 101, 100, 97,  116, 101,
-    101, 116, 97,  103, 101, 120, 112, 101, 99,  116, 101, 120, 112, 105, 114,
-    101, 115, 102, 114, 111, 109, 105, 102, 45,  109, 97,  116, 99,  104, 105,
-    102, 45,  109, 111, 100, 105, 102, 105, 101, 100, 45,  115, 105, 110, 99,
-    101, 105, 102, 45,  110, 111, 110, 101, 45,  109, 97,  116, 99,  104, 105,
-    102, 45,  114, 97,  110, 103, 101, 105, 102, 45,  117, 110, 109, 111, 100,
-    105, 102, 105, 101, 100, 45,  115, 105, 110, 99,  101, 108, 97,  115, 116,
-    45,  109, 111, 100, 105, 102, 105, 101, 100, 108, 98,  45,  99,  111, 115,
-    116, 45,  98,  105, 110, 108, 105, 110, 107, 108, 111, 99,  97,  116, 105,
-    111, 110, 109, 97,  120, 45,  102, 111, 114, 119, 97,  114, 100, 115, 112,
-    114, 111, 120, 121, 45,  97,  117, 116, 104, 101, 110, 116, 105, 99,  97,
-    116, 101, 112, 114, 111, 120, 121, 45,  97,  117, 116, 104, 111, 114, 105,
-    122, 97,  116, 105, 111, 110, 114, 97,  110, 103, 101, 114, 101, 102, 101,
-    114, 101, 114, 114, 101, 102, 114, 101, 115, 104, 114, 101, 116, 114, 121,
-    45,  97,  102, 116, 101, 114, 115, 101, 114, 118, 101, 114, 115, 101, 116,
-    45,  99,  111, 111, 107, 105, 101, 115, 116, 114, 105, 99,  116, 45,  116,
-    114, 97,  110, 115, 112, 111, 114, 116, 45,  115, 101, 99,  117, 114, 105,
-    116, 121, 116, 114, 97,  110, 115, 102, 101, 114, 45,  101, 110, 99,  111,
-    100, 105, 110, 103, 118, 97,  114, 121, 118, 105, 97,  119, 119, 119, 45,
-    97,  117, 116, 104, 101, 110, 116, 105, 99,  97,  116, 101, 105, 100, 101,
-    110, 116, 105, 116, 121, 44,  100, 101, 102, 108, 97,  116, 101, 105, 100,
-    101, 110, 116, 105, 116, 121, 44,  103, 122, 105, 112, 100, 101, 102, 108,
-    97,  116, 101, 44,  103, 122, 105, 112, 105, 100, 101, 110, 116, 105, 116,
-    121, 44,  100, 101, 102, 108, 97,  116, 101, 44,  103, 122, 105, 112};
+    45,  116, 121, 112, 101, 99,  111, 110, 116, 101, 110, 116, 45,  101, 110,
+    99,  111, 100, 105, 110, 103, 97,  99,  99,  101, 112, 116, 45,  101, 110,
+    99,  111, 100, 105, 110, 103, 103, 114, 112, 99,  45,  105, 110, 116, 101,
+    114, 110, 97,  108, 45,  101, 110, 99,  111, 100, 105, 110, 103, 45,  114,
+    101, 113, 117, 101, 115, 116, 103, 114, 112, 99,  45,  105, 110, 116, 101,
+    114, 110, 97,  108, 45,  115, 116, 114, 101, 97,  109, 45,  101, 110, 99,
+    111, 100, 105, 110, 103, 45,  114, 101, 113, 117, 101, 115, 116, 117, 115,
+    101, 114, 45,  97,  103, 101, 110, 116, 104, 111, 115, 116, 108, 98,  45,
+    116, 111, 107, 101, 110, 103, 114, 112, 99,  45,  116, 105, 109, 101, 111,
+    117, 116, 103, 114, 112, 99,  46,  119, 97,  105, 116, 95,  102, 111, 114,
+    95,  114, 101, 97,  100, 121, 103, 114, 112, 99,  46,  116, 105, 109, 101,
+    111, 117, 116, 103, 114, 112, 99,  46,  109, 97,  120, 95,  114, 101, 113,
+    117, 101, 115, 116, 95,  109, 101, 115, 115, 97,  103, 101, 95,  98,  121,
+    116, 101, 115, 103, 114, 112, 99,  46,  109, 97,  120, 95,  114, 101, 115,
+    112, 111, 110, 115, 101, 95,  109, 101, 115, 115, 97,  103, 101, 95,  98,
+    121, 116, 101, 115, 47,  103, 114, 112, 99,  46,  108, 98,  46,  118, 49,
+    46,  76,  111, 97,  100, 66,  97,  108, 97,  110, 99,  101, 114, 47,  66,
+    97,  108, 97,  110, 99,  101, 76,  111, 97,  100, 48,  49,  50,  105, 100,
+    101, 110, 116, 105, 116, 121, 103, 122, 105, 112, 100, 101, 102, 108, 97,
+    116, 101, 116, 114, 97,  105, 108, 101, 114, 115, 97,  112, 112, 108, 105,
+    99,  97,  116, 105, 111, 110, 47,  103, 114, 112, 99,  80,  79,  83,  84,
+    50,  48,  48,  52,  48,  52,  104, 116, 116, 112, 104, 116, 116, 112, 115,
+    103, 114, 112, 99,  71,  69,  84,  80,  85,  84,  47,  47,  105, 110, 100,
+    101, 120, 46,  104, 116, 109, 108, 50,  48,  52,  50,  48,  54,  51,  48,
+    52,  52,  48,  48,  53,  48,  48,  97,  99,  99,  101, 112, 116, 45,  99,
+    104, 97,  114, 115, 101, 116, 103, 122, 105, 112, 44,  32,  100, 101, 102,
+    108, 97,  116, 101, 97,  99,  99,  101, 112, 116, 45,  108, 97,  110, 103,
+    117, 97,  103, 101, 97,  99,  99,  101, 112, 116, 45,  114, 97,  110, 103,
+    101, 115, 97,  99,  99,  101, 112, 116, 97,  99,  99,  101, 115, 115, 45,
+    99,  111, 110, 116, 114, 111, 108, 45,  97,  108, 108, 111, 119, 45,  111,
+    114, 105, 103, 105, 110, 97,  103, 101, 97,  108, 108, 111, 119, 97,  117,
+    116, 104, 111, 114, 105, 122, 97,  116, 105, 111, 110, 99,  97,  99,  104,
+    101, 45,  99,  111, 110, 116, 114, 111, 108, 99,  111, 110, 116, 101, 110,
+    116, 45,  100, 105, 115, 112, 111, 115, 105, 116, 105, 111, 110, 99,  111,
+    110, 116, 101, 110, 116, 45,  108, 97,  110, 103, 117, 97,  103, 101, 99,
+    111, 110, 116, 101, 110, 116, 45,  108, 101, 110, 103, 116, 104, 99,  111,
+    110, 116, 101, 110, 116, 45,  108, 111, 99,  97,  116, 105, 111, 110, 99,
+    111, 110, 116, 101, 110, 116, 45,  114, 97,  110, 103, 101, 99,  111, 111,
+    107, 105, 101, 100, 97,  116, 101, 101, 116, 97,  103, 101, 120, 112, 101,
+    99,  116, 101, 120, 112, 105, 114, 101, 115, 102, 114, 111, 109, 105, 102,
+    45,  109, 97,  116, 99,  104, 105, 102, 45,  109, 111, 100, 105, 102, 105,
+    101, 100, 45,  115, 105, 110, 99,  101, 105, 102, 45,  110, 111, 110, 101,
+    45,  109, 97,  116, 99,  104, 105, 102, 45,  114, 97,  110, 103, 101, 105,
+    102, 45,  117, 110, 109, 111, 100, 105, 102, 105, 101, 100, 45,  115, 105,
+    110, 99,  101, 108, 97,  115, 116, 45,  109, 111, 100, 105, 102, 105, 101,
+    100, 108, 98,  45,  99,  111, 115, 116, 45,  98,  105, 110, 108, 105, 110,
+    107, 108, 111, 99,  97,  116, 105, 111, 110, 109, 97,  120, 45,  102, 111,
+    114, 119, 97,  114, 100, 115, 112, 114, 111, 120, 121, 45,  97,  117, 116,
+    104, 101, 110, 116, 105, 99,  97,  116, 101, 112, 114, 111, 120, 121, 45,
+    97,  117, 116, 104, 111, 114, 105, 122, 97,  116, 105, 111, 110, 114, 97,
+    110, 103, 101, 114, 101, 102, 101, 114, 101, 114, 114, 101, 102, 114, 101,
+    115, 104, 114, 101, 116, 114, 121, 45,  97,  102, 116, 101, 114, 115, 101,
+    114, 118, 101, 114, 115, 101, 116, 45,  99,  111, 111, 107, 105, 101, 115,
+    116, 114, 105, 99,  116, 45,  116, 114, 97,  110, 115, 112, 111, 114, 116,
+    45,  115, 101, 99,  117, 114, 105, 116, 121, 116, 114, 97,  110, 115, 102,
+    101, 114, 45,  101, 110, 99,  111, 100, 105, 110, 103, 118, 97,  114, 121,
+    118, 105, 97,  119, 119, 119, 45,  97,  117, 116, 104, 101, 110, 116, 105,
+    99,  97,  116, 101, 105, 100, 101, 110, 116, 105, 116, 121, 44,  100, 101,
+    102, 108, 97,  116, 101, 105, 100, 101, 110, 116, 105, 116, 121, 44,  103,
+    122, 105, 112, 100, 101, 102, 108, 97,  116, 101, 44,  103, 122, 105, 112,
+    105, 100, 101, 110, 116, 105, 116, 121, 44,  100, 101, 102, 108, 97,  116,
+    101, 44,  103, 122, 105, 112};
 
 static void static_ref(void *unused) {}
 static void static_unref(grpc_exec_ctx *exec_ctx, void *unused) {}
@@ -209,6 +212,7 @@ grpc_slice_refcount grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT] = {
     {&grpc_static_metadata_vtable, &static_sub_refcnt},
     {&grpc_static_metadata_vtable, &static_sub_refcnt},
     {&grpc_static_metadata_vtable, &static_sub_refcnt},
+    {&grpc_static_metadata_vtable, &static_sub_refcnt},
 };
 
 const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT] = {
@@ -243,193 +247,194 @@ const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT] = {
     {.refcount = &grpc_static_metadata_refcounts[14],
      .data.refcounted = {g_bytes + 158, 12}},
     {.refcount = &grpc_static_metadata_refcounts[15],
-     .data.refcounted = {g_bytes + 170, 30}},
+     .data.refcounted = {g_bytes + 170, 16}},
     {.refcount = &grpc_static_metadata_refcounts[16],
-     .data.refcounted = {g_bytes + 200, 10}},
+     .data.refcounted = {g_bytes + 186, 15}},
     {.refcount = &grpc_static_metadata_refcounts[17],
-     .data.refcounted = {g_bytes + 210, 4}},
+     .data.refcounted = {g_bytes + 201, 30}},
     {.refcount = &grpc_static_metadata_refcounts[18],
-     .data.refcounted = {g_bytes + 214, 8}},
+     .data.refcounted = {g_bytes + 231, 37}},
     {.refcount = &grpc_static_metadata_refcounts[19],
-     .data.refcounted = {g_bytes + 222, 12}},
+     .data.refcounted = {g_bytes + 268, 10}},
     {.refcount = &grpc_static_metadata_refcounts[20],
-     .data.refcounted = {g_bytes + 234, 0}},
+     .data.refcounted = {g_bytes + 278, 4}},
     {.refcount = &grpc_static_metadata_refcounts[21],
-     .data.refcounted = {g_bytes + 234, 19}},
+     .data.refcounted = {g_bytes + 282, 8}},
     {.refcount = &grpc_static_metadata_refcounts[22],
-     .data.refcounted = {g_bytes + 253, 12}},
+     .data.refcounted = {g_bytes + 290, 12}},
     {.refcount = &grpc_static_metadata_refcounts[23],
-     .data.refcounted = {g_bytes + 265, 30}},
+     .data.refcounted = {g_bytes + 302, 0}},
     {.refcount = &grpc_static_metadata_refcounts[24],
-     .data.refcounted = {g_bytes + 295, 31}},
+     .data.refcounted = {g_bytes + 302, 19}},
     {.refcount = &grpc_static_metadata_refcounts[25],
-     .data.refcounted = {g_bytes + 326, 36}},
+     .data.refcounted = {g_bytes + 321, 12}},
     {.refcount = &grpc_static_metadata_refcounts[26],
-     .data.refcounted = {g_bytes + 362, 1}},
+     .data.refcounted = {g_bytes + 333, 30}},
     {.refcount = &grpc_static_metadata_refcounts[27],
-     .data.refcounted = {g_bytes + 363, 1}},
+     .data.refcounted = {g_bytes + 363, 31}},
     {.refcount = &grpc_static_metadata_refcounts[28],
-     .data.refcounted = {g_bytes + 364, 1}},
+     .data.refcounted = {g_bytes + 394, 36}},
     {.refcount = &grpc_static_metadata_refcounts[29],
-     .data.refcounted = {g_bytes + 365, 8}},
+     .data.refcounted = {g_bytes + 430, 1}},
     {.refcount = &grpc_static_metadata_refcounts[30],
-     .data.refcounted = {g_bytes + 373, 4}},
+     .data.refcounted = {g_bytes + 431, 1}},
     {.refcount = &grpc_static_metadata_refcounts[31],
-     .data.refcounted = {g_bytes + 377, 7}},
+     .data.refcounted = {g_bytes + 432, 1}},
     {.refcount = &grpc_static_metadata_refcounts[32],
-     .data.refcounted = {g_bytes + 384, 8}},
+     .data.refcounted = {g_bytes + 433, 8}},
     {.refcount = &grpc_static_metadata_refcounts[33],
-     .data.refcounted = {g_bytes + 392, 16}},
+     .data.refcounted = {g_bytes + 441, 4}},
     {.refcount = &grpc_static_metadata_refcounts[34],
-     .data.refcounted = {g_bytes + 408, 4}},
+     .data.refcounted = {g_bytes + 445, 7}},
     {.refcount = &grpc_static_metadata_refcounts[35],
-     .data.refcounted = {g_bytes + 412, 3}},
+     .data.refcounted = {g_bytes + 452, 8}},
     {.refcount = &grpc_static_metadata_refcounts[36],
-     .data.refcounted = {g_bytes + 415, 3}},
+     .data.refcounted = {g_bytes + 460, 16}},
     {.refcount = &grpc_static_metadata_refcounts[37],
-     .data.refcounted = {g_bytes + 418, 4}},
+     .data.refcounted = {g_bytes + 476, 4}},
     {.refcount = &grpc_static_metadata_refcounts[38],
-     .data.refcounted = {g_bytes + 422, 5}},
+     .data.refcounted = {g_bytes + 480, 3}},
     {.refcount = &grpc_static_metadata_refcounts[39],
-     .data.refcounted = {g_bytes + 427, 4}},
+     .data.refcounted = {g_bytes + 483, 3}},
     {.refcount = &grpc_static_metadata_refcounts[40],
-     .data.refcounted = {g_bytes + 431, 3}},
+     .data.refcounted = {g_bytes + 486, 4}},
     {.refcount = &grpc_static_metadata_refcounts[41],
-     .data.refcounted = {g_bytes + 434, 3}},
+     .data.refcounted = {g_bytes + 490, 5}},
     {.refcount = &grpc_static_metadata_refcounts[42],
-     .data.refcounted = {g_bytes + 437, 1}},
+     .data.refcounted = {g_bytes + 495, 4}},
     {.refcount = &grpc_static_metadata_refcounts[43],
-     .data.refcounted = {g_bytes + 438, 11}},
+     .data.refcounted = {g_bytes + 499, 3}},
     {.refcount = &grpc_static_metadata_refcounts[44],
-     .data.refcounted = {g_bytes + 449, 3}},
+     .data.refcounted = {g_bytes + 502, 3}},
     {.refcount = &grpc_static_metadata_refcounts[45],
-     .data.refcounted = {g_bytes + 452, 3}},
+     .data.refcounted = {g_bytes + 505, 1}},
     {.refcount = &grpc_static_metadata_refcounts[46],
-     .data.refcounted = {g_bytes + 455, 3}},
+     .data.refcounted = {g_bytes + 506, 11}},
     {.refcount = &grpc_static_metadata_refcounts[47],
-     .data.refcounted = {g_bytes + 458, 3}},
+     .data.refcounted = {g_bytes + 517, 3}},
     {.refcount = &grpc_static_metadata_refcounts[48],
-     .data.refcounted = {g_bytes + 461, 3}},
+     .data.refcounted = {g_bytes + 520, 3}},
     {.refcount = &grpc_static_metadata_refcounts[49],
-     .data.refcounted = {g_bytes + 464, 14}},
+     .data.refcounted = {g_bytes + 523, 3}},
     {.refcount = &grpc_static_metadata_refcounts[50],
-     .data.refcounted = {g_bytes + 478, 15}},
+     .data.refcounted = {g_bytes + 526, 3}},
     {.refcount = &grpc_static_metadata_refcounts[51],
-     .data.refcounted = {g_bytes + 493, 13}},
+     .data.refcounted = {g_bytes + 529, 3}},
     {.refcount = &grpc_static_metadata_refcounts[52],
-     .data.refcounted = {g_bytes + 506, 15}},
+     .data.refcounted = {g_bytes + 532, 14}},
     {.refcount = &grpc_static_metadata_refcounts[53],
-     .data.refcounted = {g_bytes + 521, 13}},
+     .data.refcounted = {g_bytes + 546, 13}},
     {.refcount = &grpc_static_metadata_refcounts[54],
-     .data.refcounted = {g_bytes + 534, 6}},
+     .data.refcounted = {g_bytes + 559, 15}},
     {.refcount = &grpc_static_metadata_refcounts[55],
-     .data.refcounted = {g_bytes + 540, 27}},
+     .data.refcounted = {g_bytes + 574, 13}},
     {.refcount = &grpc_static_metadata_refcounts[56],
-     .data.refcounted = {g_bytes + 567, 3}},
+     .data.refcounted = {g_bytes + 587, 6}},
     {.refcount = &grpc_static_metadata_refcounts[57],
-     .data.refcounted = {g_bytes + 570, 5}},
+     .data.refcounted = {g_bytes + 593, 27}},
     {.refcount = &grpc_static_metadata_refcounts[58],
-     .data.refcounted = {g_bytes + 575, 13}},
+     .data.refcounted = {g_bytes + 620, 3}},
     {.refcount = &grpc_static_metadata_refcounts[59],
-     .data.refcounted = {g_bytes + 588, 13}},
+     .data.refcounted = {g_bytes + 623, 5}},
     {.refcount = &grpc_static_metadata_refcounts[60],
-     .data.refcounted = {g_bytes + 601, 19}},
+     .data.refcounted = {g_bytes + 628, 13}},
     {.refcount = &grpc_static_metadata_refcounts[61],
-     .data.refcounted = {g_bytes + 620, 16}},
+     .data.refcounted = {g_bytes + 641, 13}},
     {.refcount = &grpc_static_metadata_refcounts[62],
-     .data.refcounted = {g_bytes + 636, 16}},
+     .data.refcounted = {g_bytes + 654, 19}},
     {.refcount = &grpc_static_metadata_refcounts[63],
-     .data.refcounted = {g_bytes + 652, 14}},
+     .data.refcounted = {g_bytes + 673, 16}},
     {.refcount = &grpc_static_metadata_refcounts[64],
-     .data.refcounted = {g_bytes + 666, 16}},
+     .data.refcounted = {g_bytes + 689, 14}},
     {.refcount = &grpc_static_metadata_refcounts[65],
-     .data.refcounted = {g_bytes + 682, 13}},
+     .data.refcounted = {g_bytes + 703, 16}},
     {.refcount = &grpc_static_metadata_refcounts[66],
-     .data.refcounted = {g_bytes + 695, 6}},
+     .data.refcounted = {g_bytes + 719, 13}},
     {.refcount = &grpc_static_metadata_refcounts[67],
-     .data.refcounted = {g_bytes + 701, 4}},
+     .data.refcounted = {g_bytes + 732, 6}},
     {.refcount = &grpc_static_metadata_refcounts[68],
-     .data.refcounted = {g_bytes + 705, 4}},
+     .data.refcounted = {g_bytes + 738, 4}},
     {.refcount = &grpc_static_metadata_refcounts[69],
-     .data.refcounted = {g_bytes + 709, 6}},
+     .data.refcounted = {g_bytes + 742, 4}},
     {.refcount = &grpc_static_metadata_refcounts[70],
-     .data.refcounted = {g_bytes + 715, 7}},
+     .data.refcounted = {g_bytes + 746, 6}},
     {.refcount = &grpc_static_metadata_refcounts[71],
-     .data.refcounted = {g_bytes + 722, 4}},
+     .data.refcounted = {g_bytes + 752, 7}},
     {.refcount = &grpc_static_metadata_refcounts[72],
-     .data.refcounted = {g_bytes + 726, 8}},
+     .data.refcounted = {g_bytes + 759, 4}},
     {.refcount = &grpc_static_metadata_refcounts[73],
-     .data.refcounted = {g_bytes + 734, 17}},
+     .data.refcounted = {g_bytes + 763, 8}},
     {.refcount = &grpc_static_metadata_refcounts[74],
-     .data.refcounted = {g_bytes + 751, 13}},
+     .data.refcounted = {g_bytes + 771, 17}},
     {.refcount = &grpc_static_metadata_refcounts[75],
-     .data.refcounted = {g_bytes + 764, 8}},
+     .data.refcounted = {g_bytes + 788, 13}},
     {.refcount = &grpc_static_metadata_refcounts[76],
-     .data.refcounted = {g_bytes + 772, 19}},
+     .data.refcounted = {g_bytes + 801, 8}},
     {.refcount = &grpc_static_metadata_refcounts[77],
-     .data.refcounted = {g_bytes + 791, 13}},
+     .data.refcounted = {g_bytes + 809, 19}},
     {.refcount = &grpc_static_metadata_refcounts[78],
-     .data.refcounted = {g_bytes + 804, 11}},
+     .data.refcounted = {g_bytes + 828, 13}},
     {.refcount = &grpc_static_metadata_refcounts[79],
-     .data.refcounted = {g_bytes + 815, 4}},
+     .data.refcounted = {g_bytes + 841, 11}},
     {.refcount = &grpc_static_metadata_refcounts[80],
-     .data.refcounted = {g_bytes + 819, 8}},
+     .data.refcounted = {g_bytes + 852, 4}},
     {.refcount = &grpc_static_metadata_refcounts[81],
-     .data.refcounted = {g_bytes + 827, 12}},
+     .data.refcounted = {g_bytes + 856, 8}},
     {.refcount = &grpc_static_metadata_refcounts[82],
-     .data.refcounted = {g_bytes + 839, 18}},
+     .data.refcounted = {g_bytes + 864, 12}},
     {.refcount = &grpc_static_metadata_refcounts[83],
-     .data.refcounted = {g_bytes + 857, 19}},
+     .data.refcounted = {g_bytes + 876, 18}},
     {.refcount = &grpc_static_metadata_refcounts[84],
-     .data.refcounted = {g_bytes + 876, 5}},
+     .data.refcounted = {g_bytes + 894, 19}},
     {.refcount = &grpc_static_metadata_refcounts[85],
-     .data.refcounted = {g_bytes + 881, 7}},
+     .data.refcounted = {g_bytes + 913, 5}},
     {.refcount = &grpc_static_metadata_refcounts[86],
-     .data.refcounted = {g_bytes + 888, 7}},
+     .data.refcounted = {g_bytes + 918, 7}},
     {.refcount = &grpc_static_metadata_refcounts[87],
-     .data.refcounted = {g_bytes + 895, 11}},
+     .data.refcounted = {g_bytes + 925, 7}},
     {.refcount = &grpc_static_metadata_refcounts[88],
-     .data.refcounted = {g_bytes + 906, 6}},
+     .data.refcounted = {g_bytes + 932, 11}},
     {.refcount = &grpc_static_metadata_refcounts[89],
-     .data.refcounted = {g_bytes + 912, 10}},
+     .data.refcounted = {g_bytes + 943, 6}},
     {.refcount = &grpc_static_metadata_refcounts[90],
-     .data.refcounted = {g_bytes + 922, 25}},
+     .data.refcounted = {g_bytes + 949, 10}},
     {.refcount = &grpc_static_metadata_refcounts[91],
-     .data.refcounted = {g_bytes + 947, 17}},
+     .data.refcounted = {g_bytes + 959, 25}},
     {.refcount = &grpc_static_metadata_refcounts[92],
-     .data.refcounted = {g_bytes + 964, 4}},
+     .data.refcounted = {g_bytes + 984, 17}},
     {.refcount = &grpc_static_metadata_refcounts[93],
-     .data.refcounted = {g_bytes + 968, 3}},
+     .data.refcounted = {g_bytes + 1001, 4}},
     {.refcount = &grpc_static_metadata_refcounts[94],
-     .data.refcounted = {g_bytes + 971, 16}},
+     .data.refcounted = {g_bytes + 1005, 3}},
     {.refcount = &grpc_static_metadata_refcounts[95],
-     .data.refcounted = {g_bytes + 987, 16}},
+     .data.refcounted = {g_bytes + 1008, 16}},
     {.refcount = &grpc_static_metadata_refcounts[96],
-     .data.refcounted = {g_bytes + 1003, 13}},
+     .data.refcounted = {g_bytes + 1024, 16}},
     {.refcount = &grpc_static_metadata_refcounts[97],
-     .data.refcounted = {g_bytes + 1016, 12}},
+     .data.refcounted = {g_bytes + 1040, 13}},
     {.refcount = &grpc_static_metadata_refcounts[98],
-     .data.refcounted = {g_bytes + 1028, 21}},
+     .data.refcounted = {g_bytes + 1053, 12}},
+    {.refcount = &grpc_static_metadata_refcounts[99],
+     .data.refcounted = {g_bytes + 1065, 21}},
 };
 
 uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] = {
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 6, 6, 8, 8};
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 6, 6, 8, 8, 2, 4, 4};
 
 static const int8_t elems_r[] = {
-    10,  8,   -3,  0,   9,  21, -77, 22,  0,   10, -7,  0,   0,   0,
-    14,  0,   13,  12,  11, 0,  0,   0,   0,   0,  0,   0,   0,   0,
-    0,   0,   0,   0,   0,  0,  0,   0,   0,   0,  0,   0,   0,   0,
-    0,   0,   0,   0,   0,  0,  0,   -50, -51, 16, -53, -54, -55, -56,
-    -56, -57, -58, -59, 0,  37, 36,  35,  34,  33, 32,  31,  30,  29,
-    28,  27,  26,  25,  24, 23, 22,  21,  20,  19, 18,  17,  16,  15,
-    14,  13,  12,  11,  10, 13, 12,  11,  10,  9,  8,   7,   0};
+    11, 9,   -3, 0,   10,  26,  -74, 27,  0,   14, -7, 0,  0,  0,  10, 7,  -2,
+    0,  0,   12, 12,  11,  0,   0,   0,   0,   0,  0,  0,  0,  0,  0,  0,  0,
+    0,  0,   0,  0,   0,   0,   0,   0,   0,   0,  0,  0,  0,  0,  0,  0,  0,
+    0,  -50, 0,  -34, -55, -56, -57, -58, -59, 0,  39, 38, 37, 36, 35, 34, 33,
+    32, 31,  30, 29,  28,  27,  27,  26,  25,  24, 23, 22, 21, 20, 19, 18, 17,
+    20, 19,  18, 17,  16,  15,  14,  13,  12,  11, 10, 10, 0};
 static uint32_t elems_phash(uint32_t i) {
-  i -= 42;
-  uint32_t x = i % 97;
-  uint32_t y = i / 97;
+  i -= 45;
+  uint32_t x = i % 98;
+  uint32_t y = i / 98;
   uint32_t h = x;
   if (y < GPR_ARRAY_SIZE(elems_r)) {
     uint32_t delta = (uint32_t)elems_r[y];
@@ -439,30 +444,31 @@ static uint32_t elems_phash(uint32_t i) {
 }
 
 static const uint16_t elem_keys[] = {
-    1019, 1020, 1021, 242,  243,  244,  245,  246,  139,  140,  42,   43,
-    433,  434,  435,  920,  921,  922,  719,  720,  1406, 527,  721,  1604,
-    1703, 1802, 4871, 4970, 5001, 5168, 5267, 5366, 5465, 1419, 5564, 5663,
-    5762, 5861, 5960, 6059, 6158, 6257, 6356, 6455, 6554, 6653, 6752, 6851,
-    6950, 7049, 7148, 7247, 7346, 7445, 7544, 7643, 7742, 7841, 7940, 8039,
-    8138, 8237, 8336, 8435, 8534, 8633, 1085, 1086, 1087, 1088, 8732, 8831,
-    8930, 9029, 9128, 9227, 9326, 0,    317,  0,    0,    0,    0,    0,
+    1032, 1033, 1034, 247,  248,  249,  250,  251,  1623, 143,  144,  45,
+    46,   440,  441,  442,  1423, 1632, 1633, 932,  933,  934,  729,  730,
+    1532, 1533, 535,  731,  1923, 1436, 2023, 2123, 5223, 5523, 5623, 5723,
+    5823, 5923, 1653, 6023, 6123, 6223, 6323, 6423, 6523, 6623, 6723, 6823,
+    6923, 7023, 7123, 7223, 5423, 7323, 7423, 7523, 7623, 7723, 7823, 7923,
+    8023, 8123, 8223, 8323, 1096, 1097, 1098, 1099, 8423, 8523, 8623, 8723,
+    8823, 8923, 9023, 9123, 9223, 9323, 9423, 323,  9523, 0,    1697, 0,
     0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
-    0,    0,    0,    0,    0,    133,  233,  234,  0,    0,    0,    0,
+    0,    0,    0,    0,    0,    0,    0,    137,  238,  239,  0,    0,
     0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
     0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
-    0};
+    0,    0,    0,    0};
 static const uint8_t elem_idxs[] = {
-    74,  77,  75,  19,  20,  21,  22,  23,  15,  16,  17,  18,  11,  12,  13,
-    3,   4,   5,   0,   1,   41,  6,   2,   70,  48,  55,  24,  25,  26,  27,
-    28,  29,  30,  7,   31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  42,
-    43,  44,  45,  46,  47,  49,  50,  51,  52,  53,  54,  56,  57,  58,  59,
-    60,  61,  62,  63,  64,  65,  76,  78,  79,  80,  66,  67,  68,  69,  71,
-    72,  73,  255, 14,  255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
-    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 8,   9,   10};
+    75,  78,  76,  19,  20,  21,  22,  23,  25,  15,  16,  17,  18,  11,
+    12,  13,  42,  82,  83,  3,   4,   5,   0,   1,   36,  37,  6,   2,
+    71,  7,   49,  56,  24,  28,  29,  30,  31,  32,  26,  33,  34,  35,
+    38,  39,  40,  41,  43,  44,  45,  46,  47,  48,  27,  50,  51,  52,
+    53,  54,  55,  57,  58,  59,  60,  61,  77,  79,  80,  81,  62,  63,
+    64,  65,  66,  67,  68,  69,  70,  72,  73,  14,  74,  255, 84,  255,
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+    255, 255, 255, 255, 255, 8,   9,   10};
 
 grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {
   if (a == -1 || b == -1) return GRPC_MDNULL;
-  uint32_t k = (uint32_t)(a * 99 + b);
+  uint32_t k = (uint32_t)(a * 100 + b);
   uint32_t h = elems_phash(k);
   return h < GPR_ARRAY_SIZE(elem_keys) && elem_keys[h] == k
              ? GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[elem_idxs[h]],
@@ -473,328 +479,346 @@ grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {
 grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT] = {
     {{.refcount = &grpc_static_metadata_refcounts[7],
       .data.refcounted = {g_bytes + 50, 11}},
-     {.refcount = &grpc_static_metadata_refcounts[26],
-      .data.refcounted = {g_bytes + 362, 1}}},
+     {.refcount = &grpc_static_metadata_refcounts[29],
+      .data.refcounted = {g_bytes + 430, 1}}},
     {{.refcount = &grpc_static_metadata_refcounts[7],
       .data.refcounted = {g_bytes + 50, 11}},
-     {.refcount = &grpc_static_metadata_refcounts[27],
-      .data.refcounted = {g_bytes + 363, 1}}},
+     {.refcount = &grpc_static_metadata_refcounts[30],
+      .data.refcounted = {g_bytes + 431, 1}}},
     {{.refcount = &grpc_static_metadata_refcounts[7],
       .data.refcounted = {g_bytes + 50, 11}},
-     {.refcount = &grpc_static_metadata_refcounts[28],
-      .data.refcounted = {g_bytes + 364, 1}}},
+     {.refcount = &grpc_static_metadata_refcounts[31],
+      .data.refcounted = {g_bytes + 432, 1}}},
     {{.refcount = &grpc_static_metadata_refcounts[9],
       .data.refcounted = {g_bytes + 77, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[29],
-      .data.refcounted = {g_bytes + 365, 8}}},
+     {.refcount = &grpc_static_metadata_refcounts[32],
+      .data.refcounted = {g_bytes + 433, 8}}},
     {{.refcount = &grpc_static_metadata_refcounts[9],
       .data.refcounted = {g_bytes + 77, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[30],
-      .data.refcounted = {g_bytes + 373, 4}}},
+     {.refcount = &grpc_static_metadata_refcounts[33],
+      .data.refcounted = {g_bytes + 441, 4}}},
     {{.refcount = &grpc_static_metadata_refcounts[9],
       .data.refcounted = {g_bytes + 77, 13}},
-     {.refcount = &grpc_static_metadata_refcounts[31],
-      .data.refcounted = {g_bytes + 377, 7}}},
+     {.refcount = &grpc_static_metadata_refcounts[34],
+      .data.refcounted = {g_bytes + 445, 7}}},
     {{.refcount = &grpc_static_metadata_refcounts[5],
       .data.refcounted = {g_bytes + 36, 2}},
-     {.refcount = &grpc_static_metadata_refcounts[32],
-      .data.refcounted = {g_bytes + 384, 8}}},
+     {.refcount = &grpc_static_metadata_refcounts[35],
+      .data.refcounted = {g_bytes + 452, 8}}},
     {{.refcount = &grpc_static_metadata_refcounts[14],
       .data.refcounted = {g_bytes + 158, 12}},
-     {.refcount = &grpc_static_metadata_refcounts[33],
-      .data.refcounted = {g_bytes + 392, 16}}},
+     {.refcount = &grpc_static_metadata_refcounts[36],
+      .data.refcounted = {g_bytes + 460, 16}}},
     {{.refcount = &grpc_static_metadata_refcounts[1],
       .data.refcounted = {g_bytes + 5, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[34],
-      .data.refcounted = {g_bytes + 408, 4}}},
+     {.refcount = &grpc_static_metadata_refcounts[37],
+      .data.refcounted = {g_bytes + 476, 4}}},
     {{.refcount = &grpc_static_metadata_refcounts[2],
       .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[35],
-      .data.refcounted = {g_bytes + 412, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[38],
+      .data.refcounted = {g_bytes + 480, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[2],
       .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[36],
-      .data.refcounted = {g_bytes + 415, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[39],
+      .data.refcounted = {g_bytes + 483, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[4],
       .data.refcounted = {g_bytes + 29, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[37],
-      .data.refcounted = {g_bytes + 418, 4}}},
+     {.refcount = &grpc_static_metadata_refcounts[40],
+      .data.refcounted = {g_bytes + 486, 4}}},
     {{.refcount = &grpc_static_metadata_refcounts[4],
       .data.refcounted = {g_bytes + 29, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[38],
-      .data.refcounted = {g_bytes + 422, 5}}},
+     {.refcount = &grpc_static_metadata_refcounts[41],
+      .data.refcounted = {g_bytes + 490, 5}}},
     {{.refcount = &grpc_static_metadata_refcounts[4],
       .data.refcounted = {g_bytes + 29, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[39],
-      .data.refcounted = {g_bytes + 427, 4}}},
+     {.refcount = &grpc_static_metadata_refcounts[42],
+      .data.refcounted = {g_bytes + 495, 4}}},
     {{.refcount = &grpc_static_metadata_refcounts[3],
       .data.refcounted = {g_bytes + 19, 10}},
-     {.refcount = &grpc_static_metadata_refcounts[20],
-      .data.refcounted = {g_bytes + 234, 0}}},
+     {.refcount = &grpc_static_metadata_refcounts[23],
+      .data.refcounted = {g_bytes + 302, 0}}},
     {{.refcount = &grpc_static_metadata_refcounts[1],
       .data.refcounted = {g_bytes + 5, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[40],
-      .data.refcounted = {g_bytes + 431, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[43],
+      .data.refcounted = {g_bytes + 499, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[1],
       .data.refcounted = {g_bytes + 5, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[41],
-      .data.refcounted = {g_bytes + 434, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[44],
+      .data.refcounted = {g_bytes + 502, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[0],
       .data.refcounted = {g_bytes + 0, 5}},
-     {.refcount = &grpc_static_metadata_refcounts[42],
-      .data.refcounted = {g_bytes + 437, 1}}},
+     {.refcount = &grpc_static_metadata_refcounts[45],
+      .data.refcounted = {g_bytes + 505, 1}}},
     {{.refcount = &grpc_static_metadata_refcounts[0],
       .data.refcounted = {g_bytes + 0, 5}},
-     {.refcount = &grpc_static_metadata_refcounts[43],
-      .data.refcounted = {g_bytes + 438, 11}}},
+     {.refcount = &grpc_static_metadata_refcounts[46],
+      .data.refcounted = {g_bytes + 506, 11}}},
     {{.refcount = &grpc_static_metadata_refcounts[2],
       .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[44],
-      .data.refcounted = {g_bytes + 449, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[47],
+      .data.refcounted = {g_bytes + 517, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[2],
       .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[45],
-      .data.refcounted = {g_bytes + 452, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[48],
+      .data.refcounted = {g_bytes + 520, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[2],
       .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[46],
-      .data.refcounted = {g_bytes + 455, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[49],
+      .data.refcounted = {g_bytes + 523, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[2],
       .data.refcounted = {g_bytes + 12, 7}},
-     {.refcount = &grpc_static_metadata_refcounts[47],
-      .data.refcounted = {g_bytes + 458, 3}}},
+     {.refcount = &grpc_static_metadata_refcounts[50],
+      .data.refcounted = {g_bytes + 526, 3}}},
     {{.refcount = &grpc_static_metadata_refcounts[2],
       .data.refcounted = {g_bytes + 12, 7}},
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+      .data.refcounted = {g_bytes + 1024, 16}}},
     {{.refcount = &grpc_static_metadata_refcounts[10],
       .data.refcounted = {g_bytes + 90, 20}},
-     {.refcount = &grpc_static_metadata_refcounts[96],
-      .data.refcounted = {g_bytes + 1003, 13}}},
+     {.refcount = &grpc_static_metadata_refcounts[33],
+      .data.refcounted = {g_bytes + 441, 4}}},
     {{.refcount = &grpc_static_metadata_refcounts[10],
       .data.refcounted = {g_bytes + 90, 20}},
      {.refcount = &grpc_static_metadata_refcounts[97],
-      .data.refcounted = {g_bytes + 1016, 12}}},
+      .data.refcounted = {g_bytes + 1040, 13}}},
     {{.refcount = &grpc_static_metadata_refcounts[10],
       .data.refcounted = {g_bytes + 90, 20}},
      {.refcount = &grpc_static_metadata_refcounts[98],
-      .data.refcounted = {g_bytes + 1028, 21}}},
+      .data.refcounted = {g_bytes + 1053, 12}}},
+    {{.refcount = &grpc_static_metadata_refcounts[10],
+      .data.refcounted = {g_bytes + 90, 20}},
+     {.refcount = &grpc_static_metadata_refcounts[99],
+      .data.refcounted = {g_bytes + 1065, 21}}},
+    {{.refcount = &grpc_static_metadata_refcounts[16],
+      .data.refcounted = {g_bytes + 186, 15}},
+     {.refcount = &grpc_static_metadata_refcounts[32],
+      .data.refcounted = {g_bytes + 433, 8}}},
+    {{.refcount = &grpc_static_metadata_refcounts[16],
+      .data.refcounted = {g_bytes + 186, 15}},
+     {.refcount = &grpc_static_metadata_refcounts[33],
+      .data.refcounted = {g_bytes + 441, 4}}},
+    {{.refcount = &grpc_static_metadata_refcounts[16],
+      .data.refcounted = {g_bytes + 186, 15}},
+     {.refcount = &grpc_static_metadata_refcounts[97],
+      .data.refcounted = {g_bytes + 1040, 13}}},
 };
-const uint8_t grpc_static_accept_encoding_metadata[8] = {0,  74, 75, 76,
-                                                         77, 78, 79, 80};
+const uint8_t grpc_static_accept_encoding_metadata[8] = {0,  75, 76, 77,
+                                                         78, 79, 80, 81};
+
+const uint8_t grpc_static_accept_stream_encoding_metadata[4] = {0, 82, 83, 84};

src/core/lib/transport/static_metadata.h

@@ -29,7 +29,7 @@
 
 #include "src/core/lib/transport/metadata.h"
 
-#define GRPC_STATIC_MDSTR_COUNT 99
+#define GRPC_STATIC_MDSTR_COUNT 100
 extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 /* ":path" */
 #define GRPC_MDSTR_PATH (grpc_static_slice_table[0])
@@ -61,178 +61,181 @@ extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 #define GRPC_MDSTR_GRPC_TRACE_BIN (grpc_static_slice_table[13])
 /* "content-type" */
 #define GRPC_MDSTR_CONTENT_TYPE (grpc_static_slice_table[14])
+/* "content-encoding" */
+#define GRPC_MDSTR_CONTENT_ENCODING (grpc_static_slice_table[15])
+/* "accept-encoding" */
+#define GRPC_MDSTR_ACCEPT_ENCODING (grpc_static_slice_table[16])
 /* "grpc-internal-encoding-request" */
-#define GRPC_MDSTR_GRPC_INTERNAL_ENCODING_REQUEST (grpc_static_slice_table[15])
+#define GRPC_MDSTR_GRPC_INTERNAL_ENCODING_REQUEST (grpc_static_slice_table[17])
+/* "grpc-internal-stream-encoding-request" */
+#define GRPC_MDSTR_GRPC_INTERNAL_STREAM_ENCODING_REQUEST \
+  (grpc_static_slice_table[18])
 /* "user-agent" */
-#define GRPC_MDSTR_USER_AGENT (grpc_static_slice_table[16])
+#define GRPC_MDSTR_USER_AGENT (grpc_static_slice_table[19])
 /* "host" */
-#define GRPC_MDSTR_HOST (grpc_static_slice_table[17])
+#define GRPC_MDSTR_HOST (grpc_static_slice_table[20])
 /* "lb-token" */
-#define GRPC_MDSTR_LB_TOKEN (grpc_static_slice_table[18])
+#define GRPC_MDSTR_LB_TOKEN (grpc_static_slice_table[21])
 /* "grpc-timeout" */
-#define GRPC_MDSTR_GRPC_TIMEOUT (grpc_static_slice_table[19])
+#define GRPC_MDSTR_GRPC_TIMEOUT (grpc_static_slice_table[22])
 /* "" */
-#define GRPC_MDSTR_EMPTY (grpc_static_slice_table[20])
+#define GRPC_MDSTR_EMPTY (grpc_static_slice_table[23])
 /* "grpc.wait_for_ready" */
-#define GRPC_MDSTR_GRPC_DOT_WAIT_FOR_READY (grpc_static_slice_table[21])
+#define GRPC_MDSTR_GRPC_DOT_WAIT_FOR_READY (grpc_static_slice_table[24])
 /* "grpc.timeout" */
-#define GRPC_MDSTR_GRPC_DOT_TIMEOUT (grpc_static_slice_table[22])
+#define GRPC_MDSTR_GRPC_DOT_TIMEOUT (grpc_static_slice_table[25])
 /* "grpc.max_request_message_bytes" */
 #define GRPC_MDSTR_GRPC_DOT_MAX_REQUEST_MESSAGE_BYTES \
-  (grpc_static_slice_table[23])
+  (grpc_static_slice_table[26])
 /* "grpc.max_response_message_bytes" */
 #define GRPC_MDSTR_GRPC_DOT_MAX_RESPONSE_MESSAGE_BYTES \
-  (grpc_static_slice_table[24])
+  (grpc_static_slice_table[27])
 /* "/grpc.lb.v1.LoadBalancer/BalanceLoad" */
 #define GRPC_MDSTR_SLASH_GRPC_DOT_LB_DOT_V1_DOT_LOADBALANCER_SLASH_BALANCELOAD \
-  (grpc_static_slice_table[25])
+  (grpc_static_slice_table[28])
 /* "0" */
-#define GRPC_MDSTR_0 (grpc_static_slice_table[26])
+#define GRPC_MDSTR_0 (grpc_static_slice_table[29])
 /* "1" */
-#define GRPC_MDSTR_1 (grpc_static_slice_table[27])
+#define GRPC_MDSTR_1 (grpc_static_slice_table[30])
 /* "2" */
-#define GRPC_MDSTR_2 (grpc_static_slice_table[28])
+#define GRPC_MDSTR_2 (grpc_static_slice_table[31])
 /* "identity" */
-#define GRPC_MDSTR_IDENTITY (grpc_static_slice_table[29])
+#define GRPC_MDSTR_IDENTITY (grpc_static_slice_table[32])
 /* "gzip" */
-#define GRPC_MDSTR_GZIP (grpc_static_slice_table[30])
+#define GRPC_MDSTR_GZIP (grpc_static_slice_table[33])
 /* "deflate" */
-#define GRPC_MDSTR_DEFLATE (grpc_static_slice_table[31])
+#define GRPC_MDSTR_DEFLATE (grpc_static_slice_table[34])
 /* "trailers" */
-#define GRPC_MDSTR_TRAILERS (grpc_static_slice_table[32])
+#define GRPC_MDSTR_TRAILERS (grpc_static_slice_table[35])
 /* "application/grpc" */
-#define GRPC_MDSTR_APPLICATION_SLASH_GRPC (grpc_static_slice_table[33])
+#define GRPC_MDSTR_APPLICATION_SLASH_GRPC (grpc_static_slice_table[36])
 /* "POST" */
-#define GRPC_MDSTR_POST (grpc_static_slice_table[34])
+#define GRPC_MDSTR_POST (grpc_static_slice_table[37])
 /* "200" */
-#define GRPC_MDSTR_200 (grpc_static_slice_table[35])
+#define GRPC_MDSTR_200 (grpc_static_slice_table[38])
 /* "404" */
-#define GRPC_MDSTR_404 (grpc_static_slice_table[36])
+#define GRPC_MDSTR_404 (grpc_static_slice_table[39])
 /* "http" */
-#define GRPC_MDSTR_HTTP (grpc_static_slice_table[37])
+#define GRPC_MDSTR_HTTP (grpc_static_slice_table[40])
 /* "https" */
-#define GRPC_MDSTR_HTTPS (grpc_static_slice_table[38])
+#define GRPC_MDSTR_HTTPS (grpc_static_slice_table[41])
 /* "grpc" */
-#define GRPC_MDSTR_GRPC (grpc_static_slice_table[39])
+#define GRPC_MDSTR_GRPC (grpc_static_slice_table[42])
 /* "GET" */
-#define GRPC_MDSTR_GET (grpc_static_slice_table[40])
+#define GRPC_MDSTR_GET (grpc_static_slice_table[43])
 /* "PUT" */
-#define GRPC_MDSTR_PUT (grpc_static_slice_table[41])
+#define GRPC_MDSTR_PUT (grpc_static_slice_table[44])
 /* "/" */
-#define GRPC_MDSTR_SLASH (grpc_static_slice_table[42])
+#define GRPC_MDSTR_SLASH (grpc_static_slice_table[45])
 /* "/index.html" */
-#define GRPC_MDSTR_SLASH_INDEX_DOT_HTML (grpc_static_slice_table[43])
+#define GRPC_MDSTR_SLASH_INDEX_DOT_HTML (grpc_static_slice_table[46])
 /* "204" */
-#define GRPC_MDSTR_204 (grpc_static_slice_table[44])
+#define GRPC_MDSTR_204 (grpc_static_slice_table[47])
 /* "206" */
-#define GRPC_MDSTR_206 (grpc_static_slice_table[45])
+#define GRPC_MDSTR_206 (grpc_static_slice_table[48])
 /* "304" */
-#define GRPC_MDSTR_304 (grpc_static_slice_table[46])
+#define GRPC_MDSTR_304 (grpc_static_slice_table[49])
 /* "400" */
-#define GRPC_MDSTR_400 (grpc_static_slice_table[47])
+#define GRPC_MDSTR_400 (grpc_static_slice_table[50])
 /* "500" */
-#define GRPC_MDSTR_500 (grpc_static_slice_table[48])
+#define GRPC_MDSTR_500 (grpc_static_slice_table[51])
 /* "accept-charset" */
-#define GRPC_MDSTR_ACCEPT_CHARSET (grpc_static_slice_table[49])
-/* "accept-encoding" */
-#define GRPC_MDSTR_ACCEPT_ENCODING (grpc_static_slice_table[50])
+#define GRPC_MDSTR_ACCEPT_CHARSET (grpc_static_slice_table[52])
 /* "gzip, deflate" */
-#define GRPC_MDSTR_GZIP_COMMA_DEFLATE (grpc_static_slice_table[51])
+#define GRPC_MDSTR_GZIP_COMMA_DEFLATE (grpc_static_slice_table[53])
 /* "accept-language" */
-#define GRPC_MDSTR_ACCEPT_LANGUAGE (grpc_static_slice_table[52])
+#define GRPC_MDSTR_ACCEPT_LANGUAGE (grpc_static_slice_table[54])
 /* "accept-ranges" */
-#define GRPC_MDSTR_ACCEPT_RANGES (grpc_static_slice_table[53])
+#define GRPC_MDSTR_ACCEPT_RANGES (grpc_static_slice_table[55])
 /* "accept" */
-#define GRPC_MDSTR_ACCEPT (grpc_static_slice_table[54])
+#define GRPC_MDSTR_ACCEPT (grpc_static_slice_table[56])
 /* "access-control-allow-origin" */
-#define GRPC_MDSTR_ACCESS_CONTROL_ALLOW_ORIGIN (grpc_static_slice_table[55])
+#define GRPC_MDSTR_ACCESS_CONTROL_ALLOW_ORIGIN (grpc_static_slice_table[57])
 /* "age" */
-#define GRPC_MDSTR_AGE (grpc_static_slice_table[56])
+#define GRPC_MDSTR_AGE (grpc_static_slice_table[58])
 /* "allow" */
-#define GRPC_MDSTR_ALLOW (grpc_static_slice_table[57])
+#define GRPC_MDSTR_ALLOW (grpc_static_slice_table[59])
 /* "authorization" */
-#define GRPC_MDSTR_AUTHORIZATION (grpc_static_slice_table[58])
+#define GRPC_MDSTR_AUTHORIZATION (grpc_static_slice_table[60])
 /* "cache-control" */
-#define GRPC_MDSTR_CACHE_CONTROL (grpc_static_slice_table[59])
+#define GRPC_MDSTR_CACHE_CONTROL (grpc_static_slice_table[61])
 /* "content-disposition" */
-#define GRPC_MDSTR_CONTENT_DISPOSITION (grpc_static_slice_table[60])
-/* "content-encoding" */
-#define GRPC_MDSTR_CONTENT_ENCODING (grpc_static_slice_table[61])
+#define GRPC_MDSTR_CONTENT_DISPOSITION (grpc_static_slice_table[62])
 /* "content-language" */
-#define GRPC_MDSTR_CONTENT_LANGUAGE (grpc_static_slice_table[62])
+#define GRPC_MDSTR_CONTENT_LANGUAGE (grpc_static_slice_table[63])
 /* "content-length" */
-#define GRPC_MDSTR_CONTENT_LENGTH (grpc_static_slice_table[63])
+#define GRPC_MDSTR_CONTENT_LENGTH (grpc_static_slice_table[64])
 /* "content-location" */
-#define GRPC_MDSTR_CONTENT_LOCATION (grpc_static_slice_table[64])
+#define GRPC_MDSTR_CONTENT_LOCATION (grpc_static_slice_table[65])
 /* "content-range" */
-#define GRPC_MDSTR_CONTENT_RANGE (grpc_static_slice_table[65])
+#define GRPC_MDSTR_CONTENT_RANGE (grpc_static_slice_table[66])
 /* "cookie" */
-#define GRPC_MDSTR_COOKIE (grpc_static_slice_table[66])
+#define GRPC_MDSTR_COOKIE (grpc_static_slice_table[67])
 /* "date" */
-#define GRPC_MDSTR_DATE (grpc_static_slice_table[67])
+#define GRPC_MDSTR_DATE (grpc_static_slice_table[68])
 /* "etag" */
-#define GRPC_MDSTR_ETAG (grpc_static_slice_table[68])
+#define GRPC_MDSTR_ETAG (grpc_static_slice_table[69])
 /* "expect" */
-#define GRPC_MDSTR_EXPECT (grpc_static_slice_table[69])
+#define GRPC_MDSTR_EXPECT (grpc_static_slice_table[70])
 /* "expires" */
-#define GRPC_MDSTR_EXPIRES (grpc_static_slice_table[70])
+#define GRPC_MDSTR_EXPIRES (grpc_static_slice_table[71])
 /* "from" */
-#define GRPC_MDSTR_FROM (grpc_static_slice_table[71])
+#define GRPC_MDSTR_FROM (grpc_static_slice_table[72])
 /* "if-match" */
-#define GRPC_MDSTR_IF_MATCH (grpc_static_slice_table[72])
+#define GRPC_MDSTR_IF_MATCH (grpc_static_slice_table[73])
 /* "if-modified-since" */
-#define GRPC_MDSTR_IF_MODIFIED_SINCE (grpc_static_slice_table[73])
+#define GRPC_MDSTR_IF_MODIFIED_SINCE (grpc_static_slice_table[74])
 /* "if-none-match" */
-#define GRPC_MDSTR_IF_NONE_MATCH (grpc_static_slice_table[74])
+#define GRPC_MDSTR_IF_NONE_MATCH (grpc_static_slice_table[75])
 /* "if-range" */
-#define GRPC_MDSTR_IF_RANGE (grpc_static_slice_table[75])
+#define GRPC_MDSTR_IF_RANGE (grpc_static_slice_table[76])
 /* "if-unmodified-since" */
-#define GRPC_MDSTR_IF_UNMODIFIED_SINCE (grpc_static_slice_table[76])
+#define GRPC_MDSTR_IF_UNMODIFIED_SINCE (grpc_static_slice_table[77])
 /* "last-modified" */
-#define GRPC_MDSTR_LAST_MODIFIED (grpc_static_slice_table[77])
+#define GRPC_MDSTR_LAST_MODIFIED (grpc_static_slice_table[78])
 /* "lb-cost-bin" */
-#define GRPC_MDSTR_LB_COST_BIN (grpc_static_slice_table[78])
+#define GRPC_MDSTR_LB_COST_BIN (grpc_static_slice_table[79])
 /* "link" */
-#define GRPC_MDSTR_LINK (grpc_static_slice_table[79])
+#define GRPC_MDSTR_LINK (grpc_static_slice_table[80])
 /* "location" */
-#define GRPC_MDSTR_LOCATION (grpc_static_slice_table[80])
+#define GRPC_MDSTR_LOCATION (grpc_static_slice_table[81])
 /* "max-forwards" */
-#define GRPC_MDSTR_MAX_FORWARDS (grpc_static_slice_table[81])
+#define GRPC_MDSTR_MAX_FORWARDS (grpc_static_slice_table[82])
 /* "proxy-authenticate" */
-#define GRPC_MDSTR_PROXY_AUTHENTICATE (grpc_static_slice_table[82])
+#define GRPC_MDSTR_PROXY_AUTHENTICATE (grpc_static_slice_table[83])
 /* "proxy-authorization" */
-#define GRPC_MDSTR_PROXY_AUTHORIZATION (grpc_static_slice_table[83])
+#define GRPC_MDSTR_PROXY_AUTHORIZATION (grpc_static_slice_table[84])
 /* "range" */
-#define GRPC_MDSTR_RANGE (grpc_static_slice_table[84])
+#define GRPC_MDSTR_RANGE (grpc_static_slice_table[85])
 /* "referer" */
-#define GRPC_MDSTR_REFERER (grpc_static_slice_table[85])
+#define GRPC_MDSTR_REFERER (grpc_static_slice_table[86])
 /* "refresh" */
-#define GRPC_MDSTR_REFRESH (grpc_static_slice_table[86])
+#define GRPC_MDSTR_REFRESH (grpc_static_slice_table[87])
 /* "retry-after" */
-#define GRPC_MDSTR_RETRY_AFTER (grpc_static_slice_table[87])
+#define GRPC_MDSTR_RETRY_AFTER (grpc_static_slice_table[88])
 /* "server" */
-#define GRPC_MDSTR_SERVER (grpc_static_slice_table[88])
+#define GRPC_MDSTR_SERVER (grpc_static_slice_table[89])
 /* "set-cookie" */
-#define GRPC_MDSTR_SET_COOKIE (grpc_static_slice_table[89])
+#define GRPC_MDSTR_SET_COOKIE (grpc_static_slice_table[90])
 /* "strict-transport-security" */
-#define GRPC_MDSTR_STRICT_TRANSPORT_SECURITY (grpc_static_slice_table[90])
+#define GRPC_MDSTR_STRICT_TRANSPORT_SECURITY (grpc_static_slice_table[91])
 /* "transfer-encoding" */
-#define GRPC_MDSTR_TRANSFER_ENCODING (grpc_static_slice_table[91])
+#define GRPC_MDSTR_TRANSFER_ENCODING (grpc_static_slice_table[92])
 /* "vary" */
-#define GRPC_MDSTR_VARY (grpc_static_slice_table[92])
+#define GRPC_MDSTR_VARY (grpc_static_slice_table[93])
 /* "via" */
-#define GRPC_MDSTR_VIA (grpc_static_slice_table[93])
+#define GRPC_MDSTR_VIA (grpc_static_slice_table[94])
 /* "www-authenticate" */
-#define GRPC_MDSTR_WWW_AUTHENTICATE (grpc_static_slice_table[94])
+#define GRPC_MDSTR_WWW_AUTHENTICATE (grpc_static_slice_table[95])
 /* "identity,deflate" */
-#define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE (grpc_static_slice_table[95])
+#define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE (grpc_static_slice_table[96])
 /* "identity,gzip" */
-#define GRPC_MDSTR_IDENTITY_COMMA_GZIP (grpc_static_slice_table[96])
+#define GRPC_MDSTR_IDENTITY_COMMA_GZIP (grpc_static_slice_table[97])
 /* "deflate,gzip" */
-#define GRPC_MDSTR_DEFLATE_COMMA_GZIP (grpc_static_slice_table[97])
+#define GRPC_MDSTR_DEFLATE_COMMA_GZIP (grpc_static_slice_table[98])
 /* "identity,deflate,gzip" */
 #define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE_COMMA_GZIP \
-  (grpc_static_slice_table[98])
+  (grpc_static_slice_table[99])
 
 extern const grpc_slice_refcount_vtable grpc_static_metadata_vtable;
 extern grpc_slice_refcount
@@ -244,7 +247,7 @@ extern grpc_slice_refcount
 #define GRPC_STATIC_METADATA_INDEX(static_slice) \
   ((int)((static_slice).refcount - grpc_static_metadata_refcounts))
 
-#define GRPC_STATIC_MDELEM_COUNT 81
+#define GRPC_STATIC_MDELEM_COUNT 85
 extern grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];
 extern uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];
 /* "grpc-status": "0" */
@@ -355,141 +358,153 @@ extern uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];
 /* "content-disposition": "" */
 #define GRPC_MDELEM_CONTENT_DISPOSITION_EMPTY \
   (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[35], GRPC_MDELEM_STORAGE_STATIC))
-/* "content-encoding": "" */
-#define GRPC_MDELEM_CONTENT_ENCODING_EMPTY \
+/* "content-encoding": "identity" */
+#define GRPC_MDELEM_CONTENT_ENCODING_IDENTITY \
   (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[36], GRPC_MDELEM_STORAGE_STATIC))
+/* "content-encoding": "gzip" */
+#define GRPC_MDELEM_CONTENT_ENCODING_GZIP \
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[37], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-language": "" */
 #define GRPC_MDELEM_CONTENT_LANGUAGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[37], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[38], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-length": "" */
 #define GRPC_MDELEM_CONTENT_LENGTH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[38], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[39], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-location": "" */
 #define GRPC_MDELEM_CONTENT_LOCATION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[39], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[40], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-range": "" */
 #define GRPC_MDELEM_CONTENT_RANGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[40], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[41], GRPC_MDELEM_STORAGE_STATIC))
 /* "content-type": "" */
 #define GRPC_MDELEM_CONTENT_TYPE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[41], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[42], GRPC_MDELEM_STORAGE_STATIC))
 /* "cookie": "" */
 #define GRPC_MDELEM_COOKIE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[42], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[43], GRPC_MDELEM_STORAGE_STATIC))
 /* "date": "" */
 #define GRPC_MDELEM_DATE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[43], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[44], GRPC_MDELEM_STORAGE_STATIC))
 /* "etag": "" */
 #define GRPC_MDELEM_ETAG_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[44], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[45], GRPC_MDELEM_STORAGE_STATIC))
 /* "expect": "" */
 #define GRPC_MDELEM_EXPECT_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[45], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[46], GRPC_MDELEM_STORAGE_STATIC))
 /* "expires": "" */
 #define GRPC_MDELEM_EXPIRES_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[46], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[47], GRPC_MDELEM_STORAGE_STATIC))
 /* "from": "" */
 #define GRPC_MDELEM_FROM_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[47], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[48], GRPC_MDELEM_STORAGE_STATIC))
 /* "host": "" */
 #define GRPC_MDELEM_HOST_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[48], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[49], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-match": "" */
 #define GRPC_MDELEM_IF_MATCH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[49], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[50], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-modified-since": "" */
 #define GRPC_MDELEM_IF_MODIFIED_SINCE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[50], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[51], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-none-match": "" */
 #define GRPC_MDELEM_IF_NONE_MATCH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[51], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[52], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-range": "" */
 #define GRPC_MDELEM_IF_RANGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[52], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[53], GRPC_MDELEM_STORAGE_STATIC))
 /* "if-unmodified-since": "" */
 #define GRPC_MDELEM_IF_UNMODIFIED_SINCE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[53], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[54], GRPC_MDELEM_STORAGE_STATIC))
 /* "last-modified": "" */
 #define GRPC_MDELEM_LAST_MODIFIED_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[54], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[55], GRPC_MDELEM_STORAGE_STATIC))
 /* "lb-token": "" */
 #define GRPC_MDELEM_LB_TOKEN_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[55], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[56], GRPC_MDELEM_STORAGE_STATIC))
 /* "lb-cost-bin": "" */
 #define GRPC_MDELEM_LB_COST_BIN_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[56], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[57], GRPC_MDELEM_STORAGE_STATIC))
 /* "link": "" */
 #define GRPC_MDELEM_LINK_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[57], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[58], GRPC_MDELEM_STORAGE_STATIC))
 /* "location": "" */
 #define GRPC_MDELEM_LOCATION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[58], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[59], GRPC_MDELEM_STORAGE_STATIC))
 /* "max-forwards": "" */
 #define GRPC_MDELEM_MAX_FORWARDS_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[59], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[60], GRPC_MDELEM_STORAGE_STATIC))
 /* "proxy-authenticate": "" */
 #define GRPC_MDELEM_PROXY_AUTHENTICATE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[60], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[61], GRPC_MDELEM_STORAGE_STATIC))
 /* "proxy-authorization": "" */
 #define GRPC_MDELEM_PROXY_AUTHORIZATION_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[61], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[62], GRPC_MDELEM_STORAGE_STATIC))
 /* "range": "" */
 #define GRPC_MDELEM_RANGE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[62], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[63], GRPC_MDELEM_STORAGE_STATIC))
 /* "referer": "" */
 #define GRPC_MDELEM_REFERER_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[63], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[64], GRPC_MDELEM_STORAGE_STATIC))
 /* "refresh": "" */
 #define GRPC_MDELEM_REFRESH_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[64], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[65], GRPC_MDELEM_STORAGE_STATIC))
 /* "retry-after": "" */
 #define GRPC_MDELEM_RETRY_AFTER_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[65], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[66], GRPC_MDELEM_STORAGE_STATIC))
 /* "server": "" */
 #define GRPC_MDELEM_SERVER_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[66], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[67], GRPC_MDELEM_STORAGE_STATIC))
 /* "set-cookie": "" */
 #define GRPC_MDELEM_SET_COOKIE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[67], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[68], GRPC_MDELEM_STORAGE_STATIC))
 /* "strict-transport-security": "" */
 #define GRPC_MDELEM_STRICT_TRANSPORT_SECURITY_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[68], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[69], GRPC_MDELEM_STORAGE_STATIC))
 /* "transfer-encoding": "" */
 #define GRPC_MDELEM_TRANSFER_ENCODING_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[69], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[70], GRPC_MDELEM_STORAGE_STATIC))
 /* "user-agent": "" */
 #define GRPC_MDELEM_USER_AGENT_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[70], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[71], GRPC_MDELEM_STORAGE_STATIC))
 /* "vary": "" */
 #define GRPC_MDELEM_VARY_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[71], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[72], GRPC_MDELEM_STORAGE_STATIC))
 /* "via": "" */
 #define GRPC_MDELEM_VIA_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[72], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[73], GRPC_MDELEM_STORAGE_STATIC))
 /* "www-authenticate": "" */
 #define GRPC_MDELEM_WWW_AUTHENTICATE_EMPTY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[73], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[74], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity" */
 #define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[74], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[75], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "deflate" */
 #define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_DEFLATE \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[75], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[76], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity,deflate" */
 #define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[76], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[77], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "gzip" */
 #define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[77], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[78], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity,gzip" */
 #define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[78], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[79], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "deflate,gzip" */
 #define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_DEFLATE_COMMA_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[79], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[80], GRPC_MDELEM_STORAGE_STATIC))
 /* "grpc-accept-encoding": "identity,deflate,gzip" */
 #define GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP \
-  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[80], GRPC_MDELEM_STORAGE_STATIC))
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[81], GRPC_MDELEM_STORAGE_STATIC))
+/* "accept-encoding": "identity" */
+#define GRPC_MDELEM_ACCEPT_ENCODING_IDENTITY \
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[82], GRPC_MDELEM_STORAGE_STATIC))
+/* "accept-encoding": "gzip" */
+#define GRPC_MDELEM_ACCEPT_ENCODING_GZIP \
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[83], GRPC_MDELEM_STORAGE_STATIC))
+/* "accept-encoding": "identity,gzip" */
+#define GRPC_MDELEM_ACCEPT_ENCODING_IDENTITY_COMMA_GZIP \
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[84], GRPC_MDELEM_STORAGE_STATIC))
 
 grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b);
 typedef enum {
@@ -508,7 +523,10 @@ typedef enum {
   GRPC_BATCH_GRPC_TAGS_BIN,
   GRPC_BATCH_GRPC_TRACE_BIN,
   GRPC_BATCH_CONTENT_TYPE,
+  GRPC_BATCH_CONTENT_ENCODING,
+  GRPC_BATCH_ACCEPT_ENCODING,
   GRPC_BATCH_GRPC_INTERNAL_ENCODING_REQUEST,
+  GRPC_BATCH_GRPC_INTERNAL_STREAM_ENCODING_REQUEST,
   GRPC_BATCH_USER_AGENT,
   GRPC_BATCH_HOST,
   GRPC_BATCH_LB_TOKEN,
@@ -533,7 +551,10 @@ typedef union {
     struct grpc_linked_mdelem *grpc_tags_bin;
     struct grpc_linked_mdelem *grpc_trace_bin;
     struct grpc_linked_mdelem *content_type;
+    struct grpc_linked_mdelem *content_encoding;
+    struct grpc_linked_mdelem *accept_encoding;
     struct grpc_linked_mdelem *grpc_internal_encoding_request;
+    struct grpc_linked_mdelem *grpc_internal_stream_encoding_request;
     struct grpc_linked_mdelem *user_agent;
     struct grpc_linked_mdelem *host;
     struct grpc_linked_mdelem *lb_token;
@@ -552,4 +573,10 @@ extern const uint8_t grpc_static_accept_encoding_metadata[8];
   (GRPC_MAKE_MDELEM(                                                           \
       &grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]], \
       GRPC_MDELEM_STORAGE_STATIC))
+
+extern const uint8_t grpc_static_accept_stream_encoding_metadata[4];
+#define GRPC_MDELEM_ACCEPT_STREAM_ENCODING_FOR_ALGORITHMS(algs)                \
+  (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table                                  \
+                        [grpc_static_accept_stream_encoding_metadata[(algs)]], \
+                    GRPC_MDELEM_STORAGE_STATIC))
 #endif /* GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H */

test/core/end2end/fuzzers/hpack.dictionary

@@ -135,6 +135,7 @@
 "\x00\x0Dauthorization\x00"
 "\x00\x0Dcache-control\x00"
 "\x00\x13content-disposition\x00"
+"\x00\x10content-encoding\x08identity"
 "\x00\x10content-encoding\x04gzip"
 "\x00\x10content-language\x00"
 "\x00\x0Econtent-length\x00"

test/core/end2end/tests/stream_compressed_payload.c

@@ -95,8 +95,8 @@ static void end_test(grpc_end2end_test_fixture *f) {
 static void request_for_disabled_algorithm(
     grpc_end2end_test_config config, const char *test_name,
     uint32_t send_flags_bitmask,
-    grpc_compression_algorithm algorithm_to_disable,
-    grpc_compression_algorithm requested_client_compression_algorithm,
+    grpc_stream_compression_algorithm algorithm_to_disable,
+    grpc_stream_compression_algorithm requested_client_compression_algorithm,
     grpc_status_code expected_error, grpc_metadata *client_metadata) {
   grpc_call *c;
   grpc_call *s;
@@ -124,13 +124,13 @@ static void request_for_disabled_algorithm(
   request_payload_slice = grpc_slice_from_copied_string(str);
   request_payload = grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
-  client_args = grpc_channel_args_set_compression_algorithm(
+  client_args = grpc_channel_args_set_stream_compression_algorithm(
       NULL, requested_client_compression_algorithm);
-  server_args =
-      grpc_channel_args_set_compression_algorithm(NULL, GRPC_COMPRESS_NONE);
+  server_args = grpc_channel_args_set_stream_compression_algorithm(
+      NULL, GRPC_STREAM_COMPRESS_NONE);
   {
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    server_args = grpc_channel_args_compression_algorithm_set_state(
+    server_args = grpc_channel_args_stream_compression_algorithm_set_state(
         &exec_ctx, &server_args, algorithm_to_disable, false);
     grpc_exec_ctx_finish(&exec_ctx);
   }
@@ -229,10 +229,11 @@ static void request_for_disabled_algorithm(
   GPR_ASSERT(status == expected_error);
 
   char *algo_name = NULL;
-  GPR_ASSERT(grpc_compression_algorithm_name(algorithm_to_disable, &algo_name));
+  GPR_ASSERT(
+      grpc_stream_compression_algorithm_name(algorithm_to_disable, &algo_name));
   char *expected_details = NULL;
-  gpr_asprintf(&expected_details, "Compression algorithm '%s' is disabled.",
-               algo_name);
+  gpr_asprintf(&expected_details,
+               "Stream compression algorithm '%s' is disabled.", algo_name);
   /* and we expect a specific reason for it */
   GPR_ASSERT(0 == grpc_slice_str_cmp(details, expected_details));
   gpr_free(expected_details);
@@ -269,11 +270,17 @@ static void request_for_disabled_algorithm(
 static void request_with_payload_template(
     grpc_end2end_test_config config, const char *test_name,
     uint32_t client_send_flags_bitmask,
-    grpc_compression_algorithm default_client_channel_compression_algorithm,
-    grpc_compression_algorithm default_server_channel_compression_algorithm,
+    grpc_stream_compression_algorithm
+        default_client_channel_compression_algorithm,
+    grpc_stream_compression_algorithm
+        default_server_channel_compression_algorithm,
+    grpc_stream_compression_algorithm expected_client_compression_algorithm,
+    grpc_stream_compression_algorithm expected_server_compression_algorithm,
     grpc_metadata *client_init_metadata, bool set_server_level,
-    grpc_compression_level server_compression_level,
-    bool send_message_before_initial_metadata) {
+    grpc_stream_compression_level server_compression_level,
+    bool send_message_before_initial_metadata,
+    bool set_default_server_message_compression_algorithm,
+    grpc_compression_algorithm default_server_message_compression_algorithm) {
   grpc_call *c;
   grpc_call *s;
   grpc_slice request_payload_slice;
@@ -308,10 +315,15 @@ static void request_with_payload_template(
   grpc_slice response_payload_slice =
       grpc_slice_from_copied_string(response_str);
 
-  client_args = grpc_channel_args_set_compression_algorithm(
+  client_args = grpc_channel_args_set_stream_compression_algorithm(
       NULL, default_client_channel_compression_algorithm);
-  server_args = grpc_channel_args_set_compression_algorithm(
-      NULL, default_server_channel_compression_algorithm);
+  if (set_default_server_message_compression_algorithm) {
+    server_args = grpc_channel_args_set_compression_algorithm(
+        NULL, default_server_message_compression_algorithm);
+  } else {
+    server_args = grpc_channel_args_set_stream_compression_algorithm(
+        NULL, default_server_channel_compression_algorithm);
+  }
 
   f = begin_test(config, test_name, client_args, server_args);
   cqv = cq_verifier_create(f.cq);
@@ -385,14 +397,23 @@ static void request_with_payload_template(
                         GRPC_COMPRESS_DEFLATE) != 0);
   GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
                         GRPC_COMPRESS_GZIP) != 0);
+  GPR_ASSERT(
+      GPR_BITCOUNT(grpc_call_test_only_get_stream_encodings_accepted_by_peer(
+          s)) == GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT);
+  GPR_ASSERT(
+      GPR_BITGET(grpc_call_test_only_get_stream_encodings_accepted_by_peer(s),
+                 GRPC_STREAM_COMPRESS_NONE) != 0);
+  GPR_ASSERT(
+      GPR_BITGET(grpc_call_test_only_get_stream_encodings_accepted_by_peer(s),
+                 GRPC_STREAM_COMPRESS_GZIP) != 0);
 
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   if (set_server_level) {
-    op->data.send_initial_metadata.maybe_compression_level.is_set = true;
-    op->data.send_initial_metadata.maybe_compression_level.level =
+    op->data.send_initial_metadata.maybe_stream_compression_level.is_set = true;
+    op->data.send_initial_metadata.maybe_stream_compression_level.level =
         server_compression_level;
   }
   op->flags = 0;
@@ -536,26 +557,30 @@ static void test_invoke_request_with_compressed_payload(
     grpc_end2end_test_config config) {
   request_with_payload_template(
       config, "test_invoke_request_with_compressed_payload", 0,
+      GRPC_STREAM_COMPRESS_GZIP, GRPC_STREAM_COMPRESS_GZIP,
       GRPC_STREAM_COMPRESS_GZIP, GRPC_STREAM_COMPRESS_GZIP, NULL,
       false, /* ignored */
-      GRPC_COMPRESS_LEVEL_NONE, false);
+      GRPC_COMPRESS_LEVEL_NONE, false, false, GRPC_COMPRESS_NONE);
 }
 
 static void test_invoke_request_with_send_message_before_initial_metadata(
     grpc_end2end_test_config config) {
   request_with_payload_template(
       config, "test_invoke_request_with_send_message_before_initial_metadata",
-      0, GRPC_STREAM_COMPRESS_GZIP, GRPC_STREAM_COMPRESS_GZIP, NULL,
+      0, GRPC_STREAM_COMPRESS_GZIP, GRPC_STREAM_COMPRESS_GZIP,
+      GRPC_STREAM_COMPRESS_GZIP, GRPC_STREAM_COMPRESS_GZIP, NULL,
       false, /* ignored */
-      GRPC_COMPRESS_LEVEL_NONE, true);
+      GRPC_COMPRESS_LEVEL_NONE, true, false, GRPC_COMPRESS_NONE);
 }
 
 static void test_invoke_request_with_server_level(
     grpc_end2end_test_config config) {
-  request_with_payload_template(config, "test_invoke_request_with_server_level",
-                                0, GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE,
-                                /* ignored */ NULL, true,
-                                GRPC_STREAM_COMPRESS_LEVEL_HIGH, false);
+  request_with_payload_template(
+      config, "test_invoke_request_with_server_level", 0,
+      GRPC_STREAM_COMPRESS_NONE, GRPC_STREAM_COMPRESS_NONE,
+      GRPC_STREAM_COMPRESS_NONE, GRPC_STREAM_COMPRESS_GZIP,
+      /* ignored */ NULL, true, GRPC_STREAM_COMPRESS_LEVEL_HIGH, false, false,
+      GRPC_COMPRESS_NONE);
 }
 
 static void test_invoke_request_with_compressed_payload_md_override(
@@ -579,22 +604,18 @@ static void test_invoke_request_with_compressed_payload_md_override(
   /* Channel default NONE (aka IDENTITY), call override to stream GZIP */
   request_with_payload_template(
       config, "test_invoke_request_with_compressed_payload_md_override_1", 0,
-      GRPC_COMPRESS_NONE, GRPC_COMPRESS_NONE, &gzip_compression_override, false,
-      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE, false);
+      GRPC_STREAM_COMPRESS_NONE, GRPC_STREAM_COMPRESS_NONE,
+      GRPC_STREAM_COMPRESS_GZIP, GRPC_STREAM_COMPRESS_NONE,
+      &gzip_compression_override, false,
+      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE, false, false, GRPC_COMPRESS_NONE);
 
-  /* Channel default DEFLATE, call override to stream GZIP */
-  request_with_payload_template(
-      config, "test_invoke_request_with_compressed_payload_md_override_2", 0,
-      GRPC_COMPRESS_DEFLATE, GRPC_COMPRESS_NONE, &gzip_compression_override,
-      false,
-      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE, false);
-
-  /* Channel default stream gzip, call override to NONE (aka IDENTITY) */
+  /* Channel default stream GZIP, call override to NONE (aka IDENTITY) */
   request_with_payload_template(
       config, "test_invoke_request_with_compressed_payload_md_override_3", 0,
-      GRPC_STREAM_COMPRESS_GZIP, GRPC_COMPRESS_NONE,
+      GRPC_STREAM_COMPRESS_GZIP, GRPC_STREAM_COMPRESS_NONE,
+      GRPC_STREAM_COMPRESS_NONE, GRPC_STREAM_COMPRESS_NONE,
       &identity_compression_override, false,
-      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE, false);
+      /*ignored*/ GRPC_COMPRESS_LEVEL_NONE, false, false, GRPC_COMPRESS_NONE);
 }
 
 static void test_invoke_request_with_disabled_algorithm(
@@ -605,12 +626,25 @@ static void test_invoke_request_with_disabled_algorithm(
       GRPC_STATUS_UNIMPLEMENTED, NULL);
 }
 
+static void test_stream_compression_override_message_compression(
+    grpc_end2end_test_config config) {
+  grpc_stream_compression_level level = GRPC_STREAM_COMPRESS_LEVEL_MED;
+  request_with_payload_template(
+      config, "test_stream_compression_override_message_compression", 0,
+      GRPC_STREAM_COMPRESS_NONE, GRPC_STREAM_COMPRESS_NONE,
+      GRPC_STREAM_COMPRESS_NONE,
+      grpc_stream_compression_algorithm_for_level(
+          level, (1u << GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT) - 1),
+      /* ignored */ NULL, true, level, false, true, GRPC_COMPRESS_GZIP);
+}
+
 void stream_compressed_payload(grpc_end2end_test_config config) {
   test_invoke_request_with_compressed_payload(config);
   test_invoke_request_with_send_message_before_initial_metadata(config);
   test_invoke_request_with_server_level(config);
   test_invoke_request_with_compressed_payload_md_override(config);
   test_invoke_request_with_disabled_algorithm(config);
+  test_stream_compression_override_message_compression(config);
 }
 
 void stream_compressed_payload_pre_init(void) {}

tools/codegen/core/gen_static_metadata.py

@@ -90,6 +90,7 @@ CONFIG = [
     ('authorization', ''),
     ('cache-control', ''),
     ('content-disposition', ''),
+    ('content-encoding', 'identity'),
     ('content-encoding', 'gzip'),
     ('content-language', ''),
     ('content-length', ''),