AlkantarClanX12
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<h1 class="class">Rack::File</h1>
<div id="description" class="description">
<p><a href="File.html">Rack::File</a> serves files below the <tt>root</tt>
directory given, according to the path info of the <a
href="../Rack.html">Rack</a> request. e.g. when <a
href="File.html#method-c-new">Rack::File.new</a>("/etc") is used, you can
access 'passwd' file as <a
href="http://localhost:9292/passwd">localhost:9292/passwd</a></p>
<p>Handlers can detect if bodies are a <a href="File.html">Rack::File</a>, and
use mechanisms like sendfile on the <tt>path</tt>.</p>
</div><!-- description -->
<div id="5Buntitled-5D" class="documentation-section">
<!-- Constants -->
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<h3 class="section-header">Constants</h3>
<dl>
<dt><a name="ALLOWED_VERBS">ALLOWED_VERBS</a></dt>
<dd class="description"></dd>
<dt><a name="ALLOW_HEADER">ALLOW_HEADER</a></dt>
<dd class="description"></dd>
<dt><a name="F">F</a></dt>
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<!-- Attributes -->
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<div id="new-method" class="method-detail ">
<a name="method-c-new"></a>
<div class="method-heading">
<span class="method-name">new</span><span
class="method-args">(root, headers={}, default_mime = 'text/plain')</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="new-source">
<pre>
<span class="ruby-comment"># File lib/rack/file.rb, line 24</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">root</span>, <span class="ruby-identifier">headers</span>={}, <span class="ruby-identifier">default_mime</span> = <span class="ruby-string">'text/plain'</span>)
<span class="ruby-ivar">@root</span> = <span class="ruby-identifier">root</span>
<span class="ruby-ivar">@headers</span> = <span class="ruby-identifier">headers</span>
<span class="ruby-ivar">@default_mime</span> = <span class="ruby-identifier">default_mime</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- new-source -->
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</div><!-- public-class-method-details -->
<div id="public-instance-method-details" class="method-section section">
<h3 class="section-header">Public Instance Methods</h3>
<div id="_call-method" class="method-detail ">
<a name="method-i-_call"></a>
<div class="method-heading">
<span class="method-name">_call</span><span
class="method-args">(env)</span>
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</div>
<div class="method-description">
<div class="method-source-code" id="_call-source">
<pre>
<span class="ruby-comment"># File lib/rack/file.rb, line 36</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">_call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">unless</span> <span class="ruby-constant">ALLOWED_VERBS</span>.<span class="ruby-identifier">include?</span> <span class="ruby-identifier">env</span>[<span class="ruby-constant">REQUEST_METHOD</span>]
<span class="ruby-keyword">return</span> <span class="ruby-identifier">fail</span>(<span class="ruby-value">405</span>, <span class="ruby-string">"Method Not Allowed"</span>, {<span class="ruby-string">'Allow'</span> =<span class="ruby-operator">></span> <span class="ruby-constant">ALLOW_HEADER</span>})
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">path_info</span> = <span class="ruby-constant">Utils</span>.<span class="ruby-identifier">unescape</span>(<span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>])
<span class="ruby-identifier">clean_path_info</span> = <span class="ruby-constant">Utils</span>.<span class="ruby-identifier">clean_path_info</span>(<span class="ruby-identifier">path_info</span>)
<span class="ruby-ivar">@path</span> = <span class="ruby-constant">F</span>.<span class="ruby-identifier">join</span>(<span class="ruby-ivar">@root</span>, <span class="ruby-identifier">clean_path_info</span>)
<span class="ruby-identifier">available</span> = <span class="ruby-keyword">begin</span>
<span class="ruby-constant">F</span>.<span class="ruby-identifier">file?</span>(<span class="ruby-ivar">@path</span>) <span class="ruby-operator">&&</span> <span class="ruby-constant">F</span>.<span class="ruby-identifier">readable?</span>(<span class="ruby-ivar">@path</span>)
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">SystemCallError</span>
<span class="ruby-keyword">false</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">available</span>
<span class="ruby-identifier">serving</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">fail</span>(<span class="ruby-value">404</span>, <span class="ruby-node">"File not found: #{path_info}"</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- _call-source -->
</div>
</div><!-- _call-method -->
<div id="call-method" class="method-detail ">
<a name="method-i-call"></a>
<div class="method-heading">
<span class="method-name">call</span><span
class="method-args">(env)</span>
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</div>
<div class="method-description">
<div class="method-source-code" id="call-source">
<pre>
<span class="ruby-comment"># File lib/rack/file.rb, line 30</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-identifier">dup</span>.<span class="ruby-identifier">_call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">end</span></pre>
</div><!-- call-source -->
</div>
</div><!-- call-method -->
<div id="each-method" class="method-detail ">
<a name="method-i-each"></a>
<div class="method-heading">
<span class="method-name">each</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="each-source">
<pre>
<span class="ruby-comment"># File lib/rack/file.rb, line 101</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">each</span>
<span class="ruby-constant">F</span>.<span class="ruby-identifier">open</span>(<span class="ruby-ivar">@path</span>, <span class="ruby-string">"rb"</span>) <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">file</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">file</span>.<span class="ruby-identifier">seek</span>(<span class="ruby-ivar">@range</span>.<span class="ruby-identifier">begin</span>)
<span class="ruby-identifier">remaining_len</span> = <span class="ruby-ivar">@range</span>.<span class="ruby-identifier">end</span><span class="ruby-operator">-</span><span class="ruby-ivar">@range</span>.<span class="ruby-identifier">begin</span><span class="ruby-operator">+</span><span class="ruby-value">1</span>
<span class="ruby-keyword">while</span> <span class="ruby-identifier">remaining_len</span> <span class="ruby-operator">></span> <span class="ruby-value">0</span>
<span class="ruby-identifier">part</span> = <span class="ruby-identifier">file</span>.<span class="ruby-identifier">read</span>([<span class="ruby-value">8192</span>, <span class="ruby-identifier">remaining_len</span>].<span class="ruby-identifier">min</span>)
<span class="ruby-keyword">break</span> <span class="ruby-keyword">unless</span> <span class="ruby-identifier">part</span>
<span class="ruby-identifier">remaining_len</span> <span class="ruby-operator">-=</span> <span class="ruby-identifier">part</span>.<span class="ruby-identifier">length</span>
<span class="ruby-keyword">yield</span> <span class="ruby-identifier">part</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- each-source -->
</div>
</div><!-- each-method -->
<div id="serving-method" class="method-detail ">
<a name="method-i-serving"></a>
<div class="method-heading">
<span class="method-name">serving</span><span
class="method-args">(env)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="serving-source">
<pre>
<span class="ruby-comment"># File lib/rack/file.rb, line 59</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">serving</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">env</span>[<span class="ruby-string">"REQUEST_METHOD"</span>] <span class="ruby-operator">==</span> <span class="ruby-string">"OPTIONS"</span>
<span class="ruby-keyword">return</span> [<span class="ruby-value">200</span>, {<span class="ruby-string">'Allow'</span> =<span class="ruby-operator">></span> <span class="ruby-constant">ALLOW_HEADER</span>, <span class="ruby-constant">CONTENT_LENGTH</span> =<span class="ruby-operator">></span> <span class="ruby-string">'0'</span>}, []]
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">last_modified</span> = <span class="ruby-constant">F</span>.<span class="ruby-identifier">mtime</span>(<span class="ruby-ivar">@path</span>).<span class="ruby-identifier">httpdate</span>
<span class="ruby-keyword">return</span> [<span class="ruby-value">304</span>, {}, []] <span class="ruby-keyword">if</span> <span class="ruby-identifier">env</span>[<span class="ruby-string">'HTTP_IF_MODIFIED_SINCE'</span>] <span class="ruby-operator">==</span> <span class="ruby-identifier">last_modified</span>
<span class="ruby-identifier">headers</span> = { <span class="ruby-string">"Last-Modified"</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">last_modified</span> }
<span class="ruby-identifier">headers</span>[<span class="ruby-constant">CONTENT_TYPE</span>] = <span class="ruby-identifier">mime_type</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">mime_type</span>
<span class="ruby-comment"># Set custom headers</span>
<span class="ruby-ivar">@headers</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">field</span>, <span class="ruby-identifier">content</span><span class="ruby-operator">|</span> <span class="ruby-identifier">headers</span>[<span class="ruby-identifier">field</span>] = <span class="ruby-identifier">content</span> } <span class="ruby-keyword">if</span> <span class="ruby-ivar">@headers</span>
<span class="ruby-identifier">response</span> = [ <span class="ruby-value">200</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">env</span>[<span class="ruby-constant">REQUEST_METHOD</span>] <span class="ruby-operator">==</span> <span class="ruby-string">"HEAD"</span> <span class="ruby-operator">?</span> [] <span class="ruby-operator">:</span> <span class="ruby-keyword">self</span> ]
<span class="ruby-identifier">size</span> = <span class="ruby-identifier">filesize</span>
<span class="ruby-identifier">ranges</span> = <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Utils</span>.<span class="ruby-identifier">byte_ranges</span>(<span class="ruby-identifier">env</span>, <span class="ruby-identifier">size</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">ranges</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">ranges</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">></span> <span class="ruby-value">1</span>
<span class="ruby-comment"># No ranges, or multiple ranges (which we don't support):</span>
<span class="ruby-comment"># TODO: Support multiple byte-ranges</span>
<span class="ruby-identifier">response</span>[<span class="ruby-value">0</span>] = <span class="ruby-value">200</span>
<span class="ruby-ivar">@range</span> = <span class="ruby-value">0</span><span class="ruby-operator">..</span><span class="ruby-identifier">size</span><span class="ruby-operator">-</span><span class="ruby-value">1</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">ranges</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-comment"># Unsatisfiable. Return error, and file size:</span>
<span class="ruby-identifier">response</span> = <span class="ruby-identifier">fail</span>(<span class="ruby-value">416</span>, <span class="ruby-string">"Byte range unsatisfiable"</span>)
<span class="ruby-identifier">response</span>[<span class="ruby-value">1</span>][<span class="ruby-string">"Content-Range"</span>] = <span class="ruby-node">"bytes */#{size}"</span>
<span class="ruby-keyword">return</span> <span class="ruby-identifier">response</span>
<span class="ruby-keyword">else</span>
<span class="ruby-comment"># Partial content:</span>
<span class="ruby-ivar">@range</span> = <span class="ruby-identifier">ranges</span>[<span class="ruby-value">0</span>]
<span class="ruby-identifier">response</span>[<span class="ruby-value">0</span>] = <span class="ruby-value">206</span>
<span class="ruby-identifier">response</span>[<span class="ruby-value">1</span>][<span class="ruby-string">"Content-Range"</span>] = <span class="ruby-node">"bytes #{@range.begin}-#{@range.end}/#{size}"</span>
<span class="ruby-identifier">size</span> = <span class="ruby-ivar">@range</span>.<span class="ruby-identifier">end</span> <span class="ruby-operator">-</span> <span class="ruby-ivar">@range</span>.<span class="ruby-identifier">begin</span> <span class="ruby-operator">+</span> <span class="ruby-value">1</span>
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">response</span>[<span class="ruby-value">2</span>] = [<span class="ruby-identifier">response_body</span>] <span class="ruby-keyword">unless</span> <span class="ruby-identifier">response_body</span>.<span class="ruby-identifier">nil?</span>
<span class="ruby-identifier">response</span>[<span class="ruby-value">1</span>][<span class="ruby-constant">CONTENT_LENGTH</span>] = <span class="ruby-identifier">size</span>.<span class="ruby-identifier">to_s</span>
<span class="ruby-identifier">response</span>
<span class="ruby-keyword">end</span></pre>
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