|  | @@ -0,0 +1,313 @@
 | 
	
		
			
				|  |  | +/*
 | 
	
		
			
				|  |  | + *
 | 
	
		
			
				|  |  | + * Copyright 2015-2016, Google Inc.
 | 
	
		
			
				|  |  | + * All rights reserved.
 | 
	
		
			
				|  |  | + *
 | 
	
		
			
				|  |  | + * Redistribution and use in source and binary forms, with or without
 | 
	
		
			
				|  |  | + * modification, are permitted provided that the following conditions are
 | 
	
		
			
				|  |  | + * met:
 | 
	
		
			
				|  |  | + *
 | 
	
		
			
				|  |  | + *     * Redistributions of source code must retain the above copyright
 | 
	
		
			
				|  |  | + * notice, this list of conditions and the following disclaimer.
 | 
	
		
			
				|  |  | + *     * Redistributions in binary form must reproduce the above
 | 
	
		
			
				|  |  | + * copyright notice, this list of conditions and the following disclaimer
 | 
	
		
			
				|  |  | + * in the documentation and/or other materials provided with the
 | 
	
		
			
				|  |  | + * distribution.
 | 
	
		
			
				|  |  | + *     * Neither the name of Google Inc. nor the names of its
 | 
	
		
			
				|  |  | + * contributors may be used to endorse or promote products derived from
 | 
	
		
			
				|  |  | + * this software without specific prior written permission.
 | 
	
		
			
				|  |  | + *
 | 
	
		
			
				|  |  | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 | 
	
		
			
				|  |  | + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 | 
	
		
			
				|  |  | + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 | 
	
		
			
				|  |  | + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 | 
	
		
			
				|  |  | + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 | 
	
		
			
				|  |  | + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 | 
	
		
			
				|  |  | + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 | 
	
		
			
				|  |  | + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 | 
	
		
			
				|  |  | + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 | 
	
		
			
				|  |  | + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 | 
	
		
			
				|  |  | + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 | 
	
		
			
				|  |  | + *
 | 
	
		
			
				|  |  | + */
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +#include "src/core/http/parser.h"
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +#include <string.h>
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +#include <grpc/support/alloc.h>
 | 
	
		
			
				|  |  | +#include <grpc/support/log.h>
 | 
	
		
			
				|  |  | +#include <grpc/support/useful.h>
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static char *buf2str(void *buffer, size_t length) {
 | 
	
		
			
				|  |  | +  char *out = gpr_malloc(length + 1);
 | 
	
		
			
				|  |  | +  memcpy(out, buffer, length);
 | 
	
		
			
				|  |  | +  out[length] = 0;
 | 
	
		
			
				|  |  | +  return out;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int handle_response_line(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  uint8_t *beg = parser->cur_line;
 | 
	
		
			
				|  |  | +  uint8_t *cur = beg;
 | 
	
		
			
				|  |  | +  uint8_t *end = beg + parser->cur_line_length;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'H') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'T') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'T') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'P') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != '/') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != '1') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != '.') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur < '0' || *cur++ > '1') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != ' ') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur < '1' || *cur++ > '9') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur < '0' || *cur++ > '9') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur < '0' || *cur++ > '9') goto error;
 | 
	
		
			
				|  |  | +  parser->http.response.status =
 | 
	
		
			
				|  |  | +      (cur[-3] - '0') * 100 + (cur[-2] - '0') * 10 + (cur[-1] - '0');
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != ' ') goto error;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  /* we don't really care about the status code message */
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  return 1;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +error:
 | 
	
		
			
				|  |  | +  gpr_log(GPR_ERROR, "Failed parsing response line");
 | 
	
		
			
				|  |  | +  return 0;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int handle_request_line(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  uint8_t *beg = parser->cur_line;
 | 
	
		
			
				|  |  | +  uint8_t *cur = beg;
 | 
	
		
			
				|  |  | +  uint8_t *end = beg + parser->cur_line_length;
 | 
	
		
			
				|  |  | +  uint8_t vers_major = 0;
 | 
	
		
			
				|  |  | +  uint8_t vers_minor = 0;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  while (cur != end && *cur++ != ' ')
 | 
	
		
			
				|  |  | +    ;
 | 
	
		
			
				|  |  | +  if (cur == end) goto error;
 | 
	
		
			
				|  |  | +  parser->http.request.method = buf2str(beg, (size_t)(cur - beg - 1));
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  beg = cur;
 | 
	
		
			
				|  |  | +  while (cur != end && *cur++ != ' ')
 | 
	
		
			
				|  |  | +    ;
 | 
	
		
			
				|  |  | +  if (cur == end) goto error;
 | 
	
		
			
				|  |  | +  parser->http.request.path = buf2str(beg, (size_t)(cur - beg - 1));
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'H') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'T') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'T') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != 'P') goto error;
 | 
	
		
			
				|  |  | +  if (cur == end || *cur++ != '/') goto error;
 | 
	
		
			
				|  |  | +  vers_major = (uint8_t)(*cur++ - '1' + 1);
 | 
	
		
			
				|  |  | +  ++cur;
 | 
	
		
			
				|  |  | +  if (cur == end) goto error;
 | 
	
		
			
				|  |  | +  vers_minor = (uint8_t)(*cur++ - '1' + 1);
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (vers_major == 1) {
 | 
	
		
			
				|  |  | +    if (vers_minor == 0) {
 | 
	
		
			
				|  |  | +      parser->http.request.version = GRPC_HTTP_HTTP10;
 | 
	
		
			
				|  |  | +    } else if (vers_minor == 1) {
 | 
	
		
			
				|  |  | +      parser->http.request.version = GRPC_HTTP_HTTP11;
 | 
	
		
			
				|  |  | +    } else {
 | 
	
		
			
				|  |  | +      goto error;
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +  } else if (vers_major == 2) {
 | 
	
		
			
				|  |  | +    if (vers_minor == 0) {
 | 
	
		
			
				|  |  | +      parser->http.request.version = GRPC_HTTP_HTTP20;
 | 
	
		
			
				|  |  | +    } else {
 | 
	
		
			
				|  |  | +      goto error;
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    goto error;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  return 1;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +error:
 | 
	
		
			
				|  |  | +  gpr_log(GPR_ERROR, "Failed parsing request line");
 | 
	
		
			
				|  |  | +  return 0;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int handle_first_line(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  if (parser->cur_line[0] == 'H') {
 | 
	
		
			
				|  |  | +    parser->type = GRPC_HTTP_RESPONSE;
 | 
	
		
			
				|  |  | +    return handle_response_line(parser);
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    parser->type = GRPC_HTTP_REQUEST;
 | 
	
		
			
				|  |  | +    return handle_request_line(parser);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int add_header(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  uint8_t *beg = parser->cur_line;
 | 
	
		
			
				|  |  | +  uint8_t *cur = beg;
 | 
	
		
			
				|  |  | +  uint8_t *end = beg + parser->cur_line_length;
 | 
	
		
			
				|  |  | +  size_t *hdr_count = NULL;
 | 
	
		
			
				|  |  | +  grpc_http_header **hdrs = NULL;
 | 
	
		
			
				|  |  | +  grpc_http_header hdr = {NULL, NULL};
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  GPR_ASSERT(cur != end);
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (*cur == ' ' || *cur == '\t') {
 | 
	
		
			
				|  |  | +    gpr_log(GPR_ERROR, "Continued header lines not supported yet");
 | 
	
		
			
				|  |  | +    goto error;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  while (cur != end && *cur != ':') {
 | 
	
		
			
				|  |  | +    cur++;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  if (cur == end) {
 | 
	
		
			
				|  |  | +    gpr_log(GPR_ERROR, "Didn't find ':' in header string");
 | 
	
		
			
				|  |  | +    goto error;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  GPR_ASSERT(cur >= beg);
 | 
	
		
			
				|  |  | +  hdr.key = buf2str(beg, (size_t)(cur - beg));
 | 
	
		
			
				|  |  | +  cur++; /* skip : */
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  while (cur != end && (*cur == ' ' || *cur == '\t')) {
 | 
	
		
			
				|  |  | +    cur++;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  GPR_ASSERT(end - cur >= 2);
 | 
	
		
			
				|  |  | +  hdr.value = buf2str(cur, (size_t)(end - cur) - 2);
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (parser->type == GRPC_HTTP_RESPONSE) {
 | 
	
		
			
				|  |  | +    hdr_count = &parser->http.response.hdr_count;
 | 
	
		
			
				|  |  | +    hdrs = &parser->http.response.hdrs;
 | 
	
		
			
				|  |  | +  } else if (parser->type == GRPC_HTTP_REQUEST) {
 | 
	
		
			
				|  |  | +    hdr_count = &parser->http.request.hdr_count;
 | 
	
		
			
				|  |  | +    hdrs = &parser->http.request.hdrs;
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    return 0;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (*hdr_count == parser->hdr_capacity) {
 | 
	
		
			
				|  |  | +    parser->hdr_capacity =
 | 
	
		
			
				|  |  | +        GPR_MAX(parser->hdr_capacity + 1, parser->hdr_capacity * 3 / 2);
 | 
	
		
			
				|  |  | +    *hdrs = gpr_realloc(*hdrs, parser->hdr_capacity * sizeof(**hdrs));
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  (*hdrs)[(*hdr_count)++] = hdr;
 | 
	
		
			
				|  |  | +  return 1;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +error:
 | 
	
		
			
				|  |  | +  gpr_free(hdr.key);
 | 
	
		
			
				|  |  | +  gpr_free(hdr.value);
 | 
	
		
			
				|  |  | +  return 0;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int finish_line(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  switch (parser->state) {
 | 
	
		
			
				|  |  | +    case GRPC_HTTP_FIRST_LINE:
 | 
	
		
			
				|  |  | +      if (!handle_first_line(parser)) {
 | 
	
		
			
				|  |  | +        return 0;
 | 
	
		
			
				|  |  | +      }
 | 
	
		
			
				|  |  | +      parser->state = GRPC_HTTP_HEADERS;
 | 
	
		
			
				|  |  | +      break;
 | 
	
		
			
				|  |  | +    case GRPC_HTTP_HEADERS:
 | 
	
		
			
				|  |  | +      if (parser->cur_line_length == 2) {
 | 
	
		
			
				|  |  | +        parser->state = GRPC_HTTP_BODY;
 | 
	
		
			
				|  |  | +        break;
 | 
	
		
			
				|  |  | +      }
 | 
	
		
			
				|  |  | +      if (!add_header(parser)) {
 | 
	
		
			
				|  |  | +        return 0;
 | 
	
		
			
				|  |  | +      }
 | 
	
		
			
				|  |  | +      break;
 | 
	
		
			
				|  |  | +    case GRPC_HTTP_BODY:
 | 
	
		
			
				|  |  | +      GPR_UNREACHABLE_CODE(return 0);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  parser->cur_line_length = 0;
 | 
	
		
			
				|  |  | +  return 1;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int addbyte_body(grpc_http_parser *parser, uint8_t byte) {
 | 
	
		
			
				|  |  | +  size_t *body_length = NULL;
 | 
	
		
			
				|  |  | +  char **body = NULL;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (parser->type == GRPC_HTTP_RESPONSE) {
 | 
	
		
			
				|  |  | +    body_length = &parser->http.response.body_length;
 | 
	
		
			
				|  |  | +    body = &parser->http.response.body;
 | 
	
		
			
				|  |  | +  } else if (parser->type == GRPC_HTTP_REQUEST) {
 | 
	
		
			
				|  |  | +    body_length = &parser->http.request.body_length;
 | 
	
		
			
				|  |  | +    body = &parser->http.request.body;
 | 
	
		
			
				|  |  | +  } else {
 | 
	
		
			
				|  |  | +    return 0;
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  if (*body_length == parser->body_capacity) {
 | 
	
		
			
				|  |  | +    parser->body_capacity = GPR_MAX(8, parser->body_capacity * 3 / 2);
 | 
	
		
			
				|  |  | +    *body = gpr_realloc((void *)*body, parser->body_capacity);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  (*body)[*body_length] = (char)byte;
 | 
	
		
			
				|  |  | +  (*body_length)++;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  return 1;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static int addbyte(grpc_http_parser *parser, uint8_t byte) {
 | 
	
		
			
				|  |  | +  switch (parser->state) {
 | 
	
		
			
				|  |  | +    case GRPC_HTTP_FIRST_LINE:
 | 
	
		
			
				|  |  | +    case GRPC_HTTP_HEADERS:
 | 
	
		
			
				|  |  | +      if (parser->cur_line_length >= GRPC_HTTP_PARSER_MAX_HEADER_LENGTH) {
 | 
	
		
			
				|  |  | +        gpr_log(GPR_ERROR, "HTTP client max line length (%d) exceeded",
 | 
	
		
			
				|  |  | +                GRPC_HTTP_PARSER_MAX_HEADER_LENGTH);
 | 
	
		
			
				|  |  | +        return 0;
 | 
	
		
			
				|  |  | +      }
 | 
	
		
			
				|  |  | +      parser->cur_line[parser->cur_line_length] = byte;
 | 
	
		
			
				|  |  | +      parser->cur_line_length++;
 | 
	
		
			
				|  |  | +      if (parser->cur_line_length >= 2 &&
 | 
	
		
			
				|  |  | +          parser->cur_line[parser->cur_line_length - 2] == '\r' &&
 | 
	
		
			
				|  |  | +          parser->cur_line[parser->cur_line_length - 1] == '\n') {
 | 
	
		
			
				|  |  | +        return finish_line(parser);
 | 
	
		
			
				|  |  | +      } else {
 | 
	
		
			
				|  |  | +        return 1;
 | 
	
		
			
				|  |  | +      }
 | 
	
		
			
				|  |  | +      GPR_UNREACHABLE_CODE(return 0);
 | 
	
		
			
				|  |  | +    case GRPC_HTTP_BODY:
 | 
	
		
			
				|  |  | +      return addbyte_body(parser, byte);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  GPR_UNREACHABLE_CODE(return 0);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_http_parser_init(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  memset(parser, 0, sizeof(*parser));
 | 
	
		
			
				|  |  | +  parser->state = GRPC_HTTP_FIRST_LINE;
 | 
	
		
			
				|  |  | +  parser->type = GRPC_HTTP_UNKNOWN;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +void grpc_http_parser_destroy(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  size_t i;
 | 
	
		
			
				|  |  | +  if (parser->type == GRPC_HTTP_RESPONSE) {
 | 
	
		
			
				|  |  | +    gpr_free(parser->http.response.body);
 | 
	
		
			
				|  |  | +    for (i = 0; i < parser->http.response.hdr_count; i++) {
 | 
	
		
			
				|  |  | +      gpr_free(parser->http.response.hdrs[i].key);
 | 
	
		
			
				|  |  | +      gpr_free(parser->http.response.hdrs[i].value);
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +    gpr_free(parser->http.response.hdrs);
 | 
	
		
			
				|  |  | +  } else if (parser->type == GRPC_HTTP_REQUEST) {
 | 
	
		
			
				|  |  | +    gpr_free(parser->http.request.body);
 | 
	
		
			
				|  |  | +    for (i = 0; i < parser->http.request.hdr_count; i++) {
 | 
	
		
			
				|  |  | +      gpr_free(parser->http.request.hdrs[i].key);
 | 
	
		
			
				|  |  | +      gpr_free(parser->http.request.hdrs[i].value);
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +    gpr_free(parser->http.request.hdrs);
 | 
	
		
			
				|  |  | +    gpr_free(parser->http.request.method);
 | 
	
		
			
				|  |  | +    gpr_free(parser->http.request.path);
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +int grpc_http_parser_parse(grpc_http_parser *parser, gpr_slice slice) {
 | 
	
		
			
				|  |  | +  size_t i;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  for (i = 0; i < GPR_SLICE_LENGTH(slice); i++) {
 | 
	
		
			
				|  |  | +    if (!addbyte(parser, GPR_SLICE_START_PTR(slice)[i])) {
 | 
	
		
			
				|  |  | +      return 0;
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  return 1;
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +int grpc_http_parser_eof(grpc_http_parser *parser) {
 | 
	
		
			
				|  |  | +  return parser->state == GRPC_HTTP_BODY;
 | 
	
		
			
				|  |  | +}
 |