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  <h1>Source code for grpc_status.rpc_status</h1><div class="highlight"><pre>
<span></span><span class="c1"># Copyright 2018 The 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 status mapping in gRPC Python.&quot;&quot;&quot;</span>

<span class="kn">import</span> <span class="nn">collections</span>

<span class="kn">import</span> <span class="nn">grpc</span>

<span class="kn">from</span> <span class="nn">google.rpc</span> <span class="k">import</span> <span class="n">status_pb2</span>

<span class="n">_CODE_TO_GRPC_CODE_MAPPING</span> <span class="o">=</span> <span class="p">{</span><span class="n">x</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">x</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">grpc</span><span class="o">.</span><span class="n">StatusCode</span><span class="p">}</span>

<span class="n">_GRPC_DETAILS_METADATA_KEY</span> <span class="o">=</span> <span class="s1">&#39;grpc-status-details-bin&#39;</span>


<span class="k">class</span> <span class="nc">_Status</span><span class="p">(</span>
        <span class="n">collections</span><span class="o">.</span><span class="n">namedtuple</span><span class="p">(</span>
            <span class="s1">&#39;_Status&#39;</span><span class="p">,</span> <span class="p">(</span><span class="s1">&#39;code&#39;</span><span class="p">,</span> <span class="s1">&#39;details&#39;</span><span class="p">,</span> <span class="s1">&#39;trailing_metadata&#39;</span><span class="p">)),</span> <span class="n">grpc</span><span class="o">.</span><span class="n">Status</span><span class="p">):</span>
    <span class="k">pass</span>


<span class="k">def</span> <span class="nf">_code_to_grpc_status_code</span><span class="p">(</span><span class="n">code</span><span class="p">):</span>
    <span class="k">try</span><span class="p">:</span>
        <span class="k">return</span> <span class="n">_CODE_TO_GRPC_CODE_MAPPING</span><span class="p">[</span><span class="n">code</span><span class="p">]</span>
    <span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
        <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">&#39;Invalid status code </span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">code</span><span class="p">)</span>


<div class="viewcode-block" id="from_call"><a class="viewcode-back" href="../../grpc_status.html#grpc_status.rpc_status.from_call">[docs]</a><span class="k">def</span> <span class="nf">from_call</span><span class="p">(</span><span class="n">call</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;Returns a google.rpc.status.Status message corresponding to a given grpc.Call.</span>

<span class="sd">    This is an EXPERIMENTAL API.</span>

<span class="sd">    Args:</span>
<span class="sd">      call: A grpc.Call instance.</span>

<span class="sd">    Returns:</span>
<span class="sd">      A google.rpc.status.Status message representing the status of the RPC.</span>

<span class="sd">    Raises:</span>
<span class="sd">      ValueError: If the gRPC call&#39;s code or details are inconsistent with the</span>
<span class="sd">        status code and message inside of the google.rpc.status.Status.</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="k">if</span> <span class="n">call</span><span class="o">.</span><span class="n">trailing_metadata</span><span class="p">()</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
        <span class="k">return</span> <span class="kc">None</span>
    <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="n">call</span><span class="o">.</span><span class="n">trailing_metadata</span><span class="p">():</span>
        <span class="k">if</span> <span class="n">key</span> <span class="o">==</span> <span class="n">_GRPC_DETAILS_METADATA_KEY</span><span class="p">:</span>
            <span class="n">rich_status</span> <span class="o">=</span> <span class="n">status_pb2</span><span class="o">.</span><span class="n">Status</span><span class="o">.</span><span class="n">FromString</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
            <span class="k">if</span> <span class="n">call</span><span class="o">.</span><span class="n">code</span><span class="p">()</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="o">!=</span> <span class="n">rich_status</span><span class="o">.</span><span class="n">code</span><span class="p">:</span>
                <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
                    <span class="s1">&#39;Code in Status proto (</span><span class="si">%s</span><span class="s1">) doesn</span><span class="se">\&#39;</span><span class="s1">t match status code (</span><span class="si">%s</span><span class="s1">)&#39;</span>
                    <span class="o">%</span> <span class="p">(</span><span class="n">_code_to_grpc_status_code</span><span class="p">(</span><span class="n">rich_status</span><span class="o">.</span><span class="n">code</span><span class="p">),</span>
                       <span class="n">call</span><span class="o">.</span><span class="n">code</span><span class="p">()))</span>
            <span class="k">if</span> <span class="n">call</span><span class="o">.</span><span class="n">details</span><span class="p">()</span> <span class="o">!=</span> <span class="n">rich_status</span><span class="o">.</span><span class="n">message</span><span class="p">:</span>
                <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
                    <span class="s1">&#39;Message in Status proto (</span><span class="si">%s</span><span class="s1">) doesn</span><span class="se">\&#39;</span><span class="s1">t match status details (</span><span class="si">%s</span><span class="s1">)&#39;</span>
                    <span class="o">%</span> <span class="p">(</span><span class="n">rich_status</span><span class="o">.</span><span class="n">message</span><span class="p">,</span> <span class="n">call</span><span class="o">.</span><span class="n">details</span><span class="p">()))</span>
            <span class="k">return</span> <span class="n">rich_status</span>
    <span class="k">return</span> <span class="kc">None</span></div>


<div class="viewcode-block" id="to_status"><a class="viewcode-back" href="../../grpc_status.html#grpc_status.rpc_status.to_status">[docs]</a><span class="k">def</span> <span class="nf">to_status</span><span class="p">(</span><span class="n">status</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;Convert a google.rpc.status.Status message to grpc.Status.</span>

<span class="sd">    This is an EXPERIMENTAL API.</span>

<span class="sd">    Args:</span>
<span class="sd">      status: a google.rpc.status.Status message representing the non-OK status</span>
<span class="sd">        to terminate the RPC with and communicate it to the client.</span>

<span class="sd">    Returns:</span>
<span class="sd">      A grpc.Status instance representing the input google.rpc.status.Status message.</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="k">return</span> <span class="n">_Status</span><span class="p">(</span>
        <span class="n">code</span><span class="o">=</span><span class="n">_code_to_grpc_status_code</span><span class="p">(</span><span class="n">status</span><span class="o">.</span><span class="n">code</span><span class="p">),</span>
        <span class="n">details</span><span class="o">=</span><span class="n">status</span><span class="o">.</span><span class="n">message</span><span class="p">,</span>
        <span class="n">trailing_metadata</span><span class="o">=</span><span class="p">((</span><span class="n">_GRPC_DETAILS_METADATA_KEY</span><span class="p">,</span>
                            <span class="n">status</span><span class="o">.</span><span class="n">SerializeToString</span><span class="p">()),))</span></div>
</pre></div>

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