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  <h1>Source code for grpc_reflection.v1alpha.reflection</h1><div class="highlight"><pre>
<span></span><span class="c1"># Copyright 2016 gRPC authors.</span>
<span class="c1">#</span>
<span class="c1"># Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span>
<span class="c1"># you may not use this file except in compliance with the License.</span>
<span class="c1"># You may obtain a copy of the License at</span>
<span class="c1">#</span>
<span class="c1">#     http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="c1">#</span>
<span class="c1"># Unless required by applicable law or agreed to in writing, software</span>
<span class="c1"># distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span>
<span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<span class="c1"># See the License for the specific language governing permissions and</span>
<span class="c1"># limitations under the License.</span>
<span class="sd">&quot;&quot;&quot;Reference implementation for reflection in gRPC Python.&quot;&quot;&quot;</span>

<span class="kn">import</span> <span class="nn">grpc</span>
<span class="kn">from</span> <span class="nn">google.protobuf</span> <span class="k">import</span> <span class="n">descriptor_pb2</span>
<span class="kn">from</span> <span class="nn">google.protobuf</span> <span class="k">import</span> <span class="n">descriptor_pool</span>

<span class="kn">from</span> <span class="nn">grpc_reflection.v1alpha</span> <span class="k">import</span> <span class="n">reflection_pb2</span> <span class="k">as</span> <span class="n">_reflection_pb2</span>
<span class="kn">from</span> <span class="nn">grpc_reflection.v1alpha</span> <span class="k">import</span> <span class="n">reflection_pb2_grpc</span> <span class="k">as</span> <span class="n">_reflection_pb2_grpc</span>

<span class="n">_POOL</span> <span class="o">=</span> <span class="n">descriptor_pool</span><span class="o">.</span><span class="n">Default</span><span class="p">()</span>
<span class="n">SERVICE_NAME</span> <span class="o">=</span> <span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">DESCRIPTOR</span><span class="o">.</span><span class="n">services_by_name</span><span class="p">[</span>
    <span class="s1">&#39;ServerReflection&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">full_name</span>


<span class="k">def</span> <span class="nf">_not_found_error</span><span class="p">():</span>
    <span class="k">return</span> <span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ServerReflectionResponse</span><span class="p">(</span>
        <span class="n">error_response</span><span class="o">=</span><span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ErrorResponse</span><span class="p">(</span>
            <span class="n">error_code</span><span class="o">=</span><span class="n">grpc</span><span class="o">.</span><span class="n">StatusCode</span><span class="o">.</span><span class="n">NOT_FOUND</span><span class="o">.</span><span class="n">value</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span>
            <span class="n">error_message</span><span class="o">=</span><span class="n">grpc</span><span class="o">.</span><span class="n">StatusCode</span><span class="o">.</span><span class="n">NOT_FOUND</span><span class="o">.</span><span class="n">value</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">encode</span><span class="p">(),</span>
        <span class="p">))</span>


<span class="k">def</span> <span class="nf">_file_descriptor_response</span><span class="p">(</span><span class="n">descriptor</span><span class="p">):</span>
    <span class="n">proto</span> <span class="o">=</span> <span class="n">descriptor_pb2</span><span class="o">.</span><span class="n">FileDescriptorProto</span><span class="p">()</span>
    <span class="n">descriptor</span><span class="o">.</span><span class="n">CopyToProto</span><span class="p">(</span><span class="n">proto</span><span class="p">)</span>
    <span class="n">serialized_proto</span> <span class="o">=</span> <span class="n">proto</span><span class="o">.</span><span class="n">SerializeToString</span><span class="p">()</span>
    <span class="k">return</span> <span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ServerReflectionResponse</span><span class="p">(</span>
        <span class="n">file_descriptor_response</span><span class="o">=</span><span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">FileDescriptorResponse</span><span class="p">(</span>
            <span class="n">file_descriptor_proto</span><span class="o">=</span><span class="p">(</span><span class="n">serialized_proto</span><span class="p">,)),)</span>


<div class="viewcode-block" id="ReflectionServicer"><a class="viewcode-back" href="../../../grpc_reflection.html#grpc_reflection.v1alpha.reflection.ReflectionServicer">[docs]</a><span class="k">class</span> <span class="nc">ReflectionServicer</span><span class="p">(</span><span class="n">_reflection_pb2_grpc</span><span class="o">.</span><span class="n">ServerReflectionServicer</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;Servicer handling RPCs for service statuses.&quot;&quot;&quot;</span>

    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">service_names</span><span class="p">,</span> <span class="n">pool</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;Constructor.</span>

<span class="sd">    Args:</span>
<span class="sd">      service_names: Iterable of fully-qualified service names available.</span>
<span class="sd">    &quot;&quot;&quot;</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_service_names</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="nb">sorted</span><span class="p">(</span><span class="n">service_names</span><span class="p">))</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span> <span class="o">=</span> <span class="n">_POOL</span> <span class="k">if</span> <span class="n">pool</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">pool</span>

    <span class="k">def</span> <span class="nf">_file_by_filename</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span>
        <span class="k">try</span><span class="p">:</span>
            <span class="n">descriptor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span><span class="o">.</span><span class="n">FindFileByName</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
        <span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_not_found_error</span><span class="p">()</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_file_descriptor_response</span><span class="p">(</span><span class="n">descriptor</span><span class="p">)</span>

    <span class="k">def</span> <span class="nf">_file_containing_symbol</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fully_qualified_name</span><span class="p">):</span>
        <span class="k">try</span><span class="p">:</span>
            <span class="n">descriptor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span><span class="o">.</span><span class="n">FindFileContainingSymbol</span><span class="p">(</span>
                <span class="n">fully_qualified_name</span><span class="p">)</span>
        <span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_not_found_error</span><span class="p">()</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_file_descriptor_response</span><span class="p">(</span><span class="n">descriptor</span><span class="p">)</span>

    <span class="k">def</span> <span class="nf">_file_containing_extension</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">containing_type</span><span class="p">,</span> <span class="n">extension_number</span><span class="p">):</span>
        <span class="k">try</span><span class="p">:</span>
            <span class="n">message_descriptor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span><span class="o">.</span><span class="n">FindMessageTypeByName</span><span class="p">(</span>
                <span class="n">containing_type</span><span class="p">)</span>
            <span class="n">extension_descriptor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span><span class="o">.</span><span class="n">FindExtensionByNumber</span><span class="p">(</span>
                <span class="n">message_descriptor</span><span class="p">,</span> <span class="n">extension_number</span><span class="p">)</span>
            <span class="n">descriptor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span><span class="o">.</span><span class="n">FindFileContainingSymbol</span><span class="p">(</span>
                <span class="n">extension_descriptor</span><span class="o">.</span><span class="n">full_name</span><span class="p">)</span>
        <span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_not_found_error</span><span class="p">()</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_file_descriptor_response</span><span class="p">(</span><span class="n">descriptor</span><span class="p">)</span>

    <span class="k">def</span> <span class="nf">_all_extension_numbers_of_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">containing_type</span><span class="p">):</span>
        <span class="k">try</span><span class="p">:</span>
            <span class="n">message_descriptor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span><span class="o">.</span><span class="n">FindMessageTypeByName</span><span class="p">(</span>
                <span class="n">containing_type</span><span class="p">)</span>
            <span class="n">extension_numbers</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span>
                <span class="nb">sorted</span><span class="p">(</span>
                    <span class="n">extension</span><span class="o">.</span><span class="n">number</span>
                    <span class="k">for</span> <span class="n">extension</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pool</span><span class="o">.</span><span class="n">FindAllExtensions</span><span class="p">(</span>
                        <span class="n">message_descriptor</span><span class="p">)))</span>
        <span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_not_found_error</span><span class="p">()</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ServerReflectionResponse</span><span class="p">(</span>
                <span class="n">all_extension_numbers_response</span><span class="o">=</span><span class="n">_reflection_pb2</span><span class="o">.</span>
                <span class="n">ExtensionNumberResponse</span><span class="p">(</span>
                    <span class="n">base_type_name</span><span class="o">=</span><span class="n">message_descriptor</span><span class="o">.</span><span class="n">full_name</span><span class="p">,</span>
                    <span class="n">extension_number</span><span class="o">=</span><span class="n">extension_numbers</span><span class="p">))</span>

    <span class="k">def</span> <span class="nf">_list_services</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="k">return</span> <span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ServerReflectionResponse</span><span class="p">(</span>
            <span class="n">list_services_response</span><span class="o">=</span><span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ListServiceResponse</span><span class="p">(</span>
                <span class="n">service</span><span class="o">=</span><span class="p">[</span>
                    <span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ServiceResponse</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="n">service_name</span><span class="p">)</span>
                    <span class="k">for</span> <span class="n">service_name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_service_names</span>
                <span class="p">]))</span>

    <span class="k">def</span> <span class="nf">ServerReflectionInfo</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request_iterator</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span>
        <span class="c1"># pylint: disable=unused-argument</span>
        <span class="k">for</span> <span class="n">request</span> <span class="ow">in</span> <span class="n">request_iterator</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">request</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">&#39;file_by_filename&#39;</span><span class="p">):</span>
                <span class="k">yield</span> <span class="bp">self</span><span class="o">.</span><span class="n">_file_by_filename</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">file_by_filename</span><span class="p">)</span>
            <span class="k">elif</span> <span class="n">request</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">&#39;file_containing_symbol&#39;</span><span class="p">):</span>
                <span class="k">yield</span> <span class="bp">self</span><span class="o">.</span><span class="n">_file_containing_symbol</span><span class="p">(</span>
                    <span class="n">request</span><span class="o">.</span><span class="n">file_containing_symbol</span><span class="p">)</span>
            <span class="k">elif</span> <span class="n">request</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">&#39;file_containing_extension&#39;</span><span class="p">):</span>
                <span class="k">yield</span> <span class="bp">self</span><span class="o">.</span><span class="n">_file_containing_extension</span><span class="p">(</span>
                    <span class="n">request</span><span class="o">.</span><span class="n">file_containing_extension</span><span class="o">.</span><span class="n">containing_type</span><span class="p">,</span>
                    <span class="n">request</span><span class="o">.</span><span class="n">file_containing_extension</span><span class="o">.</span><span class="n">extension_number</span><span class="p">)</span>
            <span class="k">elif</span> <span class="n">request</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">&#39;all_extension_numbers_of_type&#39;</span><span class="p">):</span>
                <span class="k">yield</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_extension_numbers_of_type</span><span class="p">(</span>
                    <span class="n">request</span><span class="o">.</span><span class="n">all_extension_numbers_of_type</span><span class="p">)</span>
            <span class="k">elif</span> <span class="n">request</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">&#39;list_services&#39;</span><span class="p">):</span>
                <span class="k">yield</span> <span class="bp">self</span><span class="o">.</span><span class="n">_list_services</span><span class="p">()</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="k">yield</span> <span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ServerReflectionResponse</span><span class="p">(</span>
                    <span class="n">error_response</span><span class="o">=</span><span class="n">_reflection_pb2</span><span class="o">.</span><span class="n">ErrorResponse</span><span class="p">(</span>
                        <span class="n">error_code</span><span class="o">=</span><span class="n">grpc</span><span class="o">.</span><span class="n">StatusCode</span><span class="o">.</span><span class="n">INVALID_ARGUMENT</span><span class="o">.</span><span class="n">value</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span>
                        <span class="n">error_message</span><span class="o">=</span><span class="n">grpc</span><span class="o">.</span><span class="n">StatusCode</span><span class="o">.</span><span class="n">INVALID_ARGUMENT</span><span class="o">.</span><span class="n">value</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
                        <span class="o">.</span><span class="n">encode</span><span class="p">(),</span>
                    <span class="p">))</span></div>


<div class="viewcode-block" id="enable_server_reflection"><a class="viewcode-back" href="../../../grpc_reflection.html#grpc_reflection.v1alpha.reflection.enable_server_reflection">[docs]</a><span class="k">def</span> <span class="nf">enable_server_reflection</span><span class="p">(</span><span class="n">service_names</span><span class="p">,</span> <span class="n">server</span><span class="p">,</span> <span class="n">pool</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;Enables server reflection on a server.</span>

<span class="sd">    Args:</span>
<span class="sd">      service_names: Iterable of fully-qualified service names available.</span>
<span class="sd">      server: grpc.Server to which reflection service will be added.</span>
<span class="sd">      pool: DescriptorPool object to use (descriptor_pool.Default() if None).</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="n">_reflection_pb2_grpc</span><span class="o">.</span><span class="n">add_ServerReflectionServicer_to_server</span><span class="p">(</span>
        <span class="n">ReflectionServicer</span><span class="p">(</span><span class="n">service_names</span><span class="p">,</span> <span class="n">pool</span><span class="o">=</span><span class="n">pool</span><span class="p">),</span> <span class="n">server</span><span class="p">)</span></div>
</pre></div>

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