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<h1>Source code for django.template.response</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">warnings</span>
<span class="kn">from</span> <span class="nn">django.http</span> <span class="k">import</span> <span class="n">HttpResponse</span>
<span class="kn">from</span> <span class="nn">django.template</span> <span class="k">import</span> <span class="n">Context</span><span class="p">,</span> <span class="n">RequestContext</span><span class="p">,</span> <span class="n">Template</span><span class="p">,</span> <span class="n">loader</span>
<span class="kn">from</span> <span class="nn">django.template.backends.django</span> <span class="k">import</span> <span class="n">Template</span> <span class="k">as</span> <span class="n">BackendTemplate</span>
<span class="kn">from</span> <span class="nn">django.template.context</span> <span class="k">import</span> <span class="n">_current_app_undefined</span>
<span class="kn">from</span> <span class="nn">django.utils</span> <span class="k">import</span> <span class="n">six</span>
<span class="kn">from</span> <span class="nn">django.utils.deprecation</span> <span class="k">import</span> <span class="n">RemovedInDjango110Warning</span>
<span class="k">class</span> <span class="nc">ContentNotRenderedError</span><span class="p">(</span><span class="ne">Exception</span><span class="p">):</span>
<span class="k">pass</span>
<div class="viewcode-block" id="SimpleTemplateResponse"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.SimpleTemplateResponse">[docs]</a><span class="k">class</span> <span class="nc">SimpleTemplateResponse</span><span class="p">(</span><span class="n">HttpResponse</span><span class="p">):</span>
<span class="n">rendering_attrs</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'template_name'</span><span class="p">,</span> <span class="s1">'context_data'</span><span class="p">,</span> <span class="s1">'_post_render_callbacks'</span><span class="p">]</span>
<div class="viewcode-block" id="SimpleTemplateResponse.__init__"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.SimpleTemplateResponse.__init__">[docs]</a> <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">template</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">content_type</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">status</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">charset</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">template</span><span class="p">,</span> <span class="n">Template</span><span class="p">):</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"</span><span class="si">{}</span><span class="s2">'s template argument cannot be a django.template.Template "</span>
<span class="s2">"anymore. It may be a backend-specific template like those "</span>
<span class="s2">"created by get_template()."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">),</span>
<span class="n">RemovedInDjango110Warning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
<span class="n">template</span> <span class="o">=</span> <span class="n">BackendTemplate</span><span class="p">(</span><span class="n">template</span><span class="p">)</span>
<span class="c1"># It would seem obvious to call these next two members 'template' and</span>
<span class="c1"># 'context', but those names are reserved as part of the test Client</span>
<span class="c1"># API. To avoid the name collision, we use different names.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">template_name</span> <span class="o">=</span> <span class="n">template</span>
<span class="bp">self</span><span class="o">.</span><span class="n">context_data</span> <span class="o">=</span> <span class="n">context</span>
<span class="bp">self</span><span class="o">.</span><span class="n">using</span> <span class="o">=</span> <span class="n">using</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_post_render_callbacks</span> <span class="o">=</span> <span class="p">[]</span>
<span class="c1"># _request stores the current request object in subclasses that know</span>
<span class="c1"># about requests, like TemplateResponse. It's defined in the base class</span>
<span class="c1"># to minimize code duplication.</span>
<span class="c1"># It's called self._request because self.request gets overwritten by</span>
<span class="c1"># django.test.client.Client. Unlike template_name and context_data,</span>
<span class="c1"># _request should not be considered part of the public API.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_request</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># content argument doesn't make sense here because it will be replaced</span>
<span class="c1"># with rendered template so we always pass empty string in order to</span>
<span class="c1"># prevent errors and provide shorter signature.</span>
<span class="nb">super</span><span class="p">(</span><span class="n">SimpleTemplateResponse</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="s1">''</span><span class="p">,</span> <span class="n">content_type</span><span class="p">,</span> <span class="n">status</span><span class="p">,</span> <span class="n">charset</span><span class="p">)</span>
<span class="c1"># _is_rendered tracks whether the template and context has been baked</span>
<span class="c1"># into a final response.</span>
<span class="c1"># Super __init__ doesn't know any better than to set self.content to</span>
<span class="c1"># the empty string we just gave it, which wrongly sets _is_rendered</span>
<span class="c1"># True, so we initialize it to False after the call to super __init__.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span> <span class="o">=</span> <span class="kc">False</span></div>
<span class="k">def</span> <span class="nf">__getstate__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Pickling support function.</span>
<span class="sd"> Ensures that the object can't be pickled before it has been</span>
<span class="sd"> rendered, and that the pickled state only includes rendered</span>
<span class="sd"> data, not the data used to construct the response.</span>
<span class="sd"> """</span>
<span class="n">obj_dict</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">__dict__</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">ContentNotRenderedError</span><span class="p">(</span><span class="s1">'The response content must be '</span>
<span class="s1">'rendered before it can be pickled.'</span><span class="p">)</span>
<span class="k">for</span> <span class="n">attr</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">rendering_attrs</span><span class="p">:</span>
<span class="k">if</span> <span class="n">attr</span> <span class="ow">in</span> <span class="n">obj_dict</span><span class="p">:</span>
<span class="k">del</span> <span class="n">obj_dict</span><span class="p">[</span><span class="n">attr</span><span class="p">]</span>
<span class="k">return</span> <span class="n">obj_dict</span>
<div class="viewcode-block" id="SimpleTemplateResponse.resolve_template"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.SimpleTemplateResponse.resolve_template">[docs]</a> <span class="k">def</span> <span class="nf">resolve_template</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">template</span><span class="p">):</span>
<span class="s2">"Accepts a template object, path-to-template or list of paths"</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">template</span><span class="p">,</span> <span class="p">(</span><span class="nb">list</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">)):</span>
<span class="k">return</span> <span class="n">loader</span><span class="o">.</span><span class="n">select_template</span><span class="p">(</span><span class="n">template</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">using</span><span class="p">)</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">template</span><span class="p">,</span> <span class="n">six</span><span class="o">.</span><span class="n">string_types</span><span class="p">):</span>
<span class="k">return</span> <span class="n">loader</span><span class="o">.</span><span class="n">get_template</span><span class="p">(</span><span class="n">template</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">using</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">template</span></div>
<span class="k">def</span> <span class="nf">_resolve_template</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">template</span><span class="p">):</span>
<span class="c1"># This wrapper deprecates returning a django.template.Template in</span>
<span class="c1"># subclasses that override resolve_template. It can be removed in</span>
<span class="c1"># Django 1.10.</span>
<span class="n">new_template</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">resolve_template</span><span class="p">(</span><span class="n">template</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">new_template</span><span class="p">,</span> <span class="n">Template</span><span class="p">):</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"</span><span class="si">{}</span><span class="s2">.resolve_template() must return a backend-specific "</span>
<span class="s2">"template like those created by get_template(), not a "</span>
<span class="s2">"</span><span class="si">{}</span><span class="s2">."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">,</span> <span class="n">new_template</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">),</span>
<span class="n">RemovedInDjango110Warning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
<span class="n">new_template</span> <span class="o">=</span> <span class="n">BackendTemplate</span><span class="p">(</span><span class="n">new_template</span><span class="p">)</span>
<span class="k">return</span> <span class="n">new_template</span>
<div class="viewcode-block" id="SimpleTemplateResponse.resolve_context"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.SimpleTemplateResponse.resolve_context">[docs]</a> <span class="k">def</span> <span class="nf">resolve_context</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span>
<span class="k">return</span> <span class="n">context</span></div>
<span class="k">def</span> <span class="nf">_resolve_context</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span>
<span class="c1"># This wrapper deprecates returning a Context or a RequestContext in</span>
<span class="c1"># subclasses that override resolve_context. It can be removed in</span>
<span class="c1"># Django 1.10. If returning a Context or a RequestContext works by</span>
<span class="c1"># accident, it won't be an issue per se, but it won't be officially</span>
<span class="c1"># supported either.</span>
<span class="n">new_context</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">resolve_context</span><span class="p">(</span><span class="n">context</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">new_context</span><span class="p">,</span> <span class="n">RequestContext</span><span class="p">)</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_request</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_request</span> <span class="o">=</span> <span class="n">new_context</span><span class="o">.</span><span class="n">request</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">new_context</span><span class="p">,</span> <span class="n">Context</span><span class="p">):</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"</span><span class="si">{}</span><span class="s2">.resolve_context() must return a dict, not a </span><span class="si">{}</span><span class="s2">."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">,</span> <span class="n">new_context</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">),</span>
<span class="n">RemovedInDjango110Warning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
<span class="c1"># It would be tempting to do new_context = new_context.flatten()</span>
<span class="c1"># here but that would cause template context processors to run for</span>
<span class="c1"># TemplateResponse(request, template, Context({})), which would be</span>
<span class="c1"># backwards-incompatible. As a consequence another deprecation</span>
<span class="c1"># warning will be raised when rendering the template. There isn't</span>
<span class="c1"># much we can do about that.</span>
<span class="k">return</span> <span class="n">new_context</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">rendered_content</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Returns the freshly rendered content for the template and context</span>
<span class="sd"> described by the TemplateResponse.</span>
<span class="sd"> This *does not* set the final content of the response. To set the</span>
<span class="sd"> response content, you must either call render(), or set the</span>
<span class="sd"> content explicitly using the value of this property.</span>
<span class="sd"> """</span>
<span class="n">template</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_resolve_template</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">template_name</span><span class="p">)</span>
<span class="n">context</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_resolve_context</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">context_data</span><span class="p">)</span>
<span class="n">content</span> <span class="o">=</span> <span class="n">template</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_request</span><span class="p">)</span>
<span class="k">return</span> <span class="n">content</span>
<div class="viewcode-block" id="SimpleTemplateResponse.add_post_render_callback"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.SimpleTemplateResponse.add_post_render_callback">[docs]</a> <span class="k">def</span> <span class="nf">add_post_render_callback</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">callback</span><span class="p">):</span>
<span class="sd">"""Adds a new post-rendering callback.</span>
<span class="sd"> If the response has already been rendered,</span>
<span class="sd"> invoke the callback immediately.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span><span class="p">:</span>
<span class="n">callback</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_post_render_callbacks</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">callback</span><span class="p">)</span></div>
<div class="viewcode-block" id="SimpleTemplateResponse.render"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.SimpleTemplateResponse.render">[docs]</a> <span class="k">def</span> <span class="nf">render</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Renders (thereby finalizing) the content of the response.</span>
<span class="sd"> If the content has already been rendered, this is a no-op.</span>
<span class="sd"> Returns the baked response instance.</span>
<span class="sd"> """</span>
<span class="n">retval</span> <span class="o">=</span> <span class="bp">self</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">content</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">rendered_content</span>
<span class="k">for</span> <span class="n">post_callback</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_post_render_callbacks</span><span class="p">:</span>
<span class="n">newretval</span> <span class="o">=</span> <span class="n">post_callback</span><span class="p">(</span><span class="n">retval</span><span class="p">)</span>
<span class="k">if</span> <span class="n">newretval</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">retval</span> <span class="o">=</span> <span class="n">newretval</span>
<span class="k">return</span> <span class="n">retval</span></div>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">is_rendered</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span>
<span class="k">def</span> <span class="nf">__iter__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">ContentNotRenderedError</span><span class="p">(</span><span class="s1">'The response content must be '</span>
<span class="s1">'rendered before it can be iterated over.'</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">SimpleTemplateResponse</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__iter__</span><span class="p">()</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">content</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">ContentNotRenderedError</span><span class="p">(</span><span class="s1">'The response content must be '</span>
<span class="s1">'rendered before it can be accessed.'</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">SimpleTemplateResponse</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">content</span>
<span class="nd">@content</span><span class="o">.</span><span class="n">setter</span>
<span class="k">def</span> <span class="nf">content</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="sd">"""Sets the content for the response</span>
<span class="sd"> """</span>
<span class="n">HttpResponse</span><span class="o">.</span><span class="n">content</span><span class="o">.</span><span class="n">fset</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_is_rendered</span> <span class="o">=</span> <span class="kc">True</span></div>
<div class="viewcode-block" id="TemplateResponse"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.TemplateResponse">[docs]</a><span class="k">class</span> <span class="nc">TemplateResponse</span><span class="p">(</span><span class="n">SimpleTemplateResponse</span><span class="p">):</span>
<span class="n">rendering_attrs</span> <span class="o">=</span> <span class="n">SimpleTemplateResponse</span><span class="o">.</span><span class="n">rendering_attrs</span> <span class="o">+</span> <span class="p">[</span><span class="s1">'_request'</span><span class="p">,</span> <span class="s1">'_current_app'</span><span class="p">]</span>
<div class="viewcode-block" id="TemplateResponse.__init__"><a class="viewcode-back" href="../../../ref/template-response.html#django.template.response.TemplateResponse.__init__">[docs]</a> <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">request</span><span class="p">,</span> <span class="n">template</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">content_type</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">status</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">current_app</span><span class="o">=</span><span class="n">_current_app_undefined</span><span class="p">,</span> <span class="n">charset</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">using</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="c1"># As a convenience we'll allow callers to provide current_app without</span>
<span class="c1"># having to avoid needing to create the RequestContext directly</span>
<span class="k">if</span> <span class="n">current_app</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_current_app_undefined</span><span class="p">:</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"The current_app argument of TemplateResponse is deprecated. "</span>
<span class="s2">"Set the current_app attribute of its request instead."</span><span class="p">,</span>
<span class="n">RemovedInDjango110Warning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
<span class="n">request</span><span class="o">.</span><span class="n">current_app</span> <span class="o">=</span> <span class="n">current_app</span>
<span class="nb">super</span><span class="p">(</span><span class="n">TemplateResponse</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span>
<span class="n">template</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">content_type</span><span class="p">,</span> <span class="n">status</span><span class="p">,</span> <span class="n">charset</span><span class="p">,</span> <span class="n">using</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_request</span> <span class="o">=</span> <span class="n">request</span></div></div>
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