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  <h1>Código fuente para django.views.static</h1><div class="highlight"><pre>
<span></span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">Views and functions for serving static files. These are only to be used</span>
<span class="sd">during development, and SHOULD NOT be used in a production setting.</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">unicode_literals</span>

<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">posixpath</span>
<span class="kn">import</span> <span class="nn">re</span>
<span class="kn">import</span> <span class="nn">stat</span>

<span class="kn">from</span> <span class="nn">django.http</span> <span class="k">import</span> <span class="p">(</span>
    <span class="n">FileResponse</span><span class="p">,</span> <span class="n">Http404</span><span class="p">,</span> <span class="n">HttpResponse</span><span class="p">,</span> <span class="n">HttpResponseNotModified</span><span class="p">,</span>
<span class="p">)</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">Engine</span><span class="p">,</span> <span class="n">TemplateDoesNotExist</span><span class="p">,</span> <span class="n">loader</span>
<span class="kn">from</span> <span class="nn">django.utils._os</span> <span class="k">import</span> <span class="n">safe_join</span>
<span class="kn">from</span> <span class="nn">django.utils.http</span> <span class="k">import</span> <span class="n">http_date</span><span class="p">,</span> <span class="n">parse_http_date</span>
<span class="kn">from</span> <span class="nn">django.utils.six.moves.urllib.parse</span> <span class="k">import</span> <span class="n">unquote</span>
<span class="kn">from</span> <span class="nn">django.utils.translation</span> <span class="k">import</span> <span class="n">ugettext</span> <span class="k">as</span> <span class="n">_</span><span class="p">,</span> <span class="n">ugettext_lazy</span>


<span class="k">def</span> <span class="nf">serve</span><span class="p">(</span><span class="n">request</span><span class="p">,</span> <span class="n">path</span><span class="p">,</span> <span class="n">document_root</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">show_indexes</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    Serve static files below a given point in the directory structure.</span>

<span class="sd">    To use, put a URL pattern such as::</span>

<span class="sd">        from django.views.static import serve</span>

<span class="sd">        url(r&#39;^(?P&lt;path&gt;.*)$&#39;, serve, {&#39;document_root&#39;: &#39;/path/to/my/files/&#39;})</span>

<span class="sd">    in your URLconf. You must provide the ``document_root`` param. You may</span>
<span class="sd">    also set ``show_indexes`` to ``True`` if you&#39;d like to serve a basic index</span>
<span class="sd">    of the directory.  This index view will use the template hardcoded below,</span>
<span class="sd">    but if you&#39;d like to override it, you can create a template called</span>
<span class="sd">    ``static/directory_index.html``.</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="n">path</span> <span class="o">=</span> <span class="n">posixpath</span><span class="o">.</span><span class="n">normpath</span><span class="p">(</span><span class="n">unquote</span><span class="p">(</span><span class="n">path</span><span class="p">))</span><span class="o">.</span><span class="n">lstrip</span><span class="p">(</span><span class="s1">&#39;/&#39;</span><span class="p">)</span>
    <span class="n">fullpath</span> <span class="o">=</span> <span class="n">safe_join</span><span class="p">(</span><span class="n">document_root</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
    <span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isdir</span><span class="p">(</span><span class="n">fullpath</span><span class="p">):</span>
        <span class="k">if</span> <span class="n">show_indexes</span><span class="p">:</span>
            <span class="k">return</span> <span class="n">directory_index</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">fullpath</span><span class="p">)</span>
        <span class="k">raise</span> <span class="n">Http404</span><span class="p">(</span><span class="n">_</span><span class="p">(</span><span class="s2">&quot;Directory indexes are not allowed here.&quot;</span><span class="p">))</span>
    <span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">fullpath</span><span class="p">):</span>
        <span class="k">raise</span> <span class="n">Http404</span><span class="p">(</span><span class="n">_</span><span class="p">(</span><span class="s1">&#39;&quot;</span><span class="si">%(path)s</span><span class="s1">&quot; does not exist&#39;</span><span class="p">)</span> <span class="o">%</span> <span class="p">{</span><span class="s1">&#39;path&#39;</span><span class="p">:</span> <span class="n">fullpath</span><span class="p">})</span>
    <span class="c1"># Respect the If-Modified-Since header.</span>
    <span class="n">statobj</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">stat</span><span class="p">(</span><span class="n">fullpath</span><span class="p">)</span>
    <span class="k">if</span> <span class="ow">not</span> <span class="n">was_modified_since</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">META</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;HTTP_IF_MODIFIED_SINCE&#39;</span><span class="p">),</span>
                              <span class="n">statobj</span><span class="o">.</span><span class="n">st_mtime</span><span class="p">,</span> <span class="n">statobj</span><span class="o">.</span><span class="n">st_size</span><span class="p">):</span>
        <span class="k">return</span> <span class="n">HttpResponseNotModified</span><span class="p">()</span>
    <span class="n">content_type</span><span class="p">,</span> <span class="n">encoding</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_type</span><span class="p">(</span><span class="n">fullpath</span><span class="p">)</span>
    <span class="n">content_type</span> <span class="o">=</span> <span class="n">content_type</span> <span class="ow">or</span> <span class="s1">&#39;application/octet-stream&#39;</span>
    <span class="n">response</span> <span class="o">=</span> <span class="n">FileResponse</span><span class="p">(</span><span class="nb">open</span><span class="p">(</span><span class="n">fullpath</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">),</span> <span class="n">content_type</span><span class="o">=</span><span class="n">content_type</span><span class="p">)</span>
    <span class="n">response</span><span class="p">[</span><span class="s2">&quot;Last-Modified&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="n">http_date</span><span class="p">(</span><span class="n">statobj</span><span class="o">.</span><span class="n">st_mtime</span><span class="p">)</span>
    <span class="k">if</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_ISREG</span><span class="p">(</span><span class="n">statobj</span><span class="o">.</span><span class="n">st_mode</span><span class="p">):</span>
        <span class="n">response</span><span class="p">[</span><span class="s2">&quot;Content-Length&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="n">statobj</span><span class="o">.</span><span class="n">st_size</span>
    <span class="k">if</span> <span class="n">encoding</span><span class="p">:</span>
        <span class="n">response</span><span class="p">[</span><span class="s2">&quot;Content-Encoding&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="n">encoding</span>
    <span class="k">return</span> <span class="n">response</span>


<span class="n">DEFAULT_DIRECTORY_INDEX_TEMPLATE</span> <span class="o">=</span> <span class="s2">&quot;&quot;&quot;</span>
<span class="s2">{</span><span class="si">% lo</span><span class="s2">ad i18n %}</span>
<span class="s2">&lt;!DOCTYPE html&gt;</span>
<span class="s2">&lt;html lang=&quot;en&quot;&gt;</span>
<span class="s2">  &lt;head&gt;</span>
<span class="s2">    &lt;meta http-equiv=&quot;Content-type&quot; content=&quot;text/html; charset=utf-8&quot; /&gt;</span>
<span class="s2">    &lt;meta http-equiv=&quot;Content-Language&quot; content=&quot;en-us&quot; /&gt;</span>
<span class="s2">    &lt;meta name=&quot;robots&quot; content=&quot;NONE,NOARCHIVE&quot; /&gt;</span>
<span class="s2">    &lt;title&gt;{% blocktrans %}Index of {{ directory }}{</span><span class="si">% e</span><span class="s2">ndblocktrans %}&lt;/title&gt;</span>
<span class="s2">  &lt;/head&gt;</span>
<span class="s2">  &lt;body&gt;</span>
<span class="s2">    &lt;h1&gt;{% blocktrans %}Index of {{ directory }}{</span><span class="si">% e</span><span class="s2">ndblocktrans %}&lt;/h1&gt;</span>
<span class="s2">    &lt;ul&gt;</span>
<span class="s2">      {</span><span class="si">% i</span><span class="s2">f directory != &quot;/&quot; %}</span>
<span class="s2">      &lt;li&gt;&lt;a href=&quot;../&quot;&gt;../&lt;/a&gt;&lt;/li&gt;</span>
<span class="s2">      {</span><span class="si">% e</span><span class="s2">ndif %}</span>
<span class="s2">      {</span><span class="si">% f</span><span class="s2">or f in file_list %}</span>
<span class="s2">      &lt;li&gt;&lt;a href=&quot;{{ f|urlencode }}&quot;&gt;{{ f }}&lt;/a&gt;&lt;/li&gt;</span>
<span class="s2">      {</span><span class="si">% e</span><span class="s2">ndfor %}</span>
<span class="s2">    &lt;/ul&gt;</span>
<span class="s2">  &lt;/body&gt;</span>
<span class="s2">&lt;/html&gt;</span>
<span class="s2">&quot;&quot;&quot;</span>
<span class="n">template_translatable</span> <span class="o">=</span> <span class="n">ugettext_lazy</span><span class="p">(</span><span class="s2">&quot;Index of </span><span class="si">%(directory)s</span><span class="s2">&quot;</span><span class="p">)</span>


<span class="k">def</span> <span class="nf">directory_index</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">fullpath</span><span class="p">):</span>
    <span class="k">try</span><span class="p">:</span>
        <span class="n">t</span> <span class="o">=</span> <span class="n">loader</span><span class="o">.</span><span class="n">select_template</span><span class="p">([</span>
            <span class="s1">&#39;static/directory_index.html&#39;</span><span class="p">,</span>
            <span class="s1">&#39;static/directory_index&#39;</span><span class="p">,</span>
        <span class="p">])</span>
    <span class="k">except</span> <span class="n">TemplateDoesNotExist</span><span class="p">:</span>
        <span class="n">t</span> <span class="o">=</span> <span class="n">Engine</span><span class="p">(</span><span class="n">libraries</span><span class="o">=</span><span class="p">{</span><span class="s1">&#39;i18n&#39;</span><span class="p">:</span> <span class="s1">&#39;django.templatetags.i18n&#39;</span><span class="p">})</span><span class="o">.</span><span class="n">from_string</span><span class="p">(</span><span class="n">DEFAULT_DIRECTORY_INDEX_TEMPLATE</span><span class="p">)</span>
    <span class="n">files</span> <span class="o">=</span> <span class="p">[]</span>
    <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">listdir</span><span class="p">(</span><span class="n">fullpath</span><span class="p">):</span>
        <span class="k">if</span> <span class="ow">not</span> <span class="n">f</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s1">&#39;.&#39;</span><span class="p">):</span>
            <span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isdir</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">fullpath</span><span class="p">,</span> <span class="n">f</span><span class="p">)):</span>
                <span class="n">f</span> <span class="o">+=</span> <span class="s1">&#39;/&#39;</span>
            <span class="n">files</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">)</span>
    <span class="n">c</span> <span class="o">=</span> <span class="n">Context</span><span class="p">({</span>
        <span class="s1">&#39;directory&#39;</span><span class="p">:</span> <span class="n">path</span> <span class="o">+</span> <span class="s1">&#39;/&#39;</span><span class="p">,</span>
        <span class="s1">&#39;file_list&#39;</span><span class="p">:</span> <span class="n">files</span><span class="p">,</span>
    <span class="p">})</span>
    <span class="k">return</span> <span class="n">HttpResponse</span><span class="p">(</span><span class="n">t</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="n">c</span><span class="p">))</span>


<span class="k">def</span> <span class="nf">was_modified_since</span><span class="p">(</span><span class="n">header</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">mtime</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">size</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    Was something modified since the user last downloaded it?</span>

<span class="sd">    header</span>
<span class="sd">      This is the value of the If-Modified-Since header.  If this is None,</span>
<span class="sd">      I&#39;ll just return True.</span>

<span class="sd">    mtime</span>
<span class="sd">      This is the modification time of the item we&#39;re talking about.</span>

<span class="sd">    size</span>
<span class="sd">      This is the size of the item we&#39;re talking about.</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="k">try</span><span class="p">:</span>
        <span class="k">if</span> <span class="n">header</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
            <span class="k">raise</span> <span class="ne">ValueError</span>
        <span class="n">matches</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="sa">r</span><span class="s2">&quot;^([^;]+)(; length=([0-9]+))?$&quot;</span><span class="p">,</span> <span class="n">header</span><span class="p">,</span>
                           <span class="n">re</span><span class="o">.</span><span class="n">IGNORECASE</span><span class="p">)</span>
        <span class="n">header_mtime</span> <span class="o">=</span> <span class="n">parse_http_date</span><span class="p">(</span><span class="n">matches</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">))</span>
        <span class="n">header_len</span> <span class="o">=</span> <span class="n">matches</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
        <span class="k">if</span> <span class="n">header_len</span> <span class="ow">and</span> <span class="nb">int</span><span class="p">(</span><span class="n">header_len</span><span class="p">)</span> <span class="o">!=</span> <span class="n">size</span><span class="p">:</span>
            <span class="k">raise</span> <span class="ne">ValueError</span>
        <span class="k">if</span> <span class="nb">int</span><span class="p">(</span><span class="n">mtime</span><span class="p">)</span> <span class="o">&gt;</span> <span class="n">header_mtime</span><span class="p">:</span>
            <span class="k">raise</span> <span class="ne">ValueError</span>
    <span class="k">except</span> <span class="p">(</span><span class="ne">AttributeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">,</span> <span class="ne">OverflowError</span><span class="p">):</span>
        <span class="k">return</span> <span class="kc">True</span>
    <span class="k">return</span> <span class="kc">False</span>
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