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<li><a href="#example">Example</a></li>
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<div class="col-sm-9 doc-styling">
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<h1><i class="glyphicon glyphicon-cog"></i> <code class="obj">urlresolver</code>
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<span class="sig">()</span></h1>
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<ul class=page-meta>
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<li>Method of <a href="../">Environment</a></li>
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</ul>
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<p>This is very experimental API and used to register a custom URL resolver
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function with the environment. It's invoked whenever a node has matched but
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more data is left to parse. This can be used to implement virtual items.
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This works in combination with <a href="../generator/" class="ref">generator</a> but handles the
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URL matching part of the equation.</p>
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<p>The registered function is invoked with a source object and a list of
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URL path segments.</p>
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<h2 id="example">Example</h2><div class="hll"><pre><span></span><span class="kn">from</span> <span class="nn">lektor.sourceobj</span> <span class="kn">import</span> <span class="n">VirtualSourceObject</span>
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<span class="kn">from</span> <span class="nn">lektor.utils</span> <span class="kn">import</span> <span class="n">build_url</span>
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<span class="k">class</span> <span class="nc">Source</span><span class="p">(</span><span class="n">VirtualSourceObject</span><span class="p">):</span>
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<span class="nd">@property</span>
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<span class="k">def</span> <span class="nf">path</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">record</span><span class="o">.</span><span class="n">path</span> <span class="o">+</span> <span class="s1">'@source'</span>
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<span class="nd">@property</span>
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<span class="k">def</span> <span class="nf">url_path</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="k">return</span> <span class="n">build_url</span><span class="p">([</span><span class="bp">self</span><span class="o">.</span><span class="n">record</span><span class="o">.</span><span class="n">url_path</span><span class="p">,</span> <span class="s1">'source.txt'</span><span class="p">])</span>
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<span class="nd">@env</span><span class="o">.</span><span class="n">urlresolver</span>
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<span class="k">def</span> <span class="nf">match_source_file</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">url_path</span><span class="p">):</span>
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<span class="k">if</span> <span class="n">url_path</span> <span class="o">==</span> <span class="p">[</span><span class="s1">'source.txt'</span><span class="p">]</span> \
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<span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">Record</span><span class="p">)</span> \
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<span class="ow">and</span> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">is_attachment</span><span class="p">:</span>
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<span class="k">return</span> <span class="n">Source</span><span class="p">(</span><span class="n">node</span><span class="p">)</span>
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</pre></div>
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