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<h3>Methods</h3>
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<li ><a href="#method-c-new">::new</a>
<li ><a href="#method-i-add_index_root-3F">#add_index_root?</a>
<li ><a href="#method-i-applicable_rules">#applicable_rules</a>
<li ><a href="#method-i-call">#call</a>
<li ><a href="#method-i-can_serve">#can_serve</a>
<li ><a href="#method-i-overwrite_file_path">#overwrite_file_path</a>
<li ><a href="#method-i-route_file">#route_file</a>
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<h1 id="class-Rack::Static" class="class">
class Rack::Static
</h1>
<section class="description">
<p>The <a href="Static.html"><code>Rack::Static</code></a> middleware intercepts requests for static files (javascript files, images, stylesheets, etc) based on the url prefixes or route mappings passed in the options, and serves them using a <a href="Files.html"><code>Rack::Files</code></a> object. This allows a <a href="../Rack.html"><code>Rack</code></a> stack to serve both static and dynamic content.</p>
<p>Examples:</p>
<p>Serve all requests beginning with /media from the “media” folder located in the current directory (ie media/*):</p>
<pre class="ruby"><span class="ruby-identifier">use</span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Static</span>, <span class="ruby-value">:urls</span> <span class="ruby-operator">=></span> [<span class="ruby-string">"/media"</span>]
</pre>
<p>Same as previous, but instead of returning 404 for missing files under /media, call the next middleware:</p>
<pre class="ruby"><span class="ruby-identifier">use</span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Static</span>, <span class="ruby-value">:urls</span> <span class="ruby-operator">=></span> [<span class="ruby-string">"/media"</span>], <span class="ruby-value">:cascade</span> <span class="ruby-operator">=></span> <span class="ruby-keyword">true</span>
</pre>
<p>Serve all requests beginning with /css or /images from the folder “public” in the current directory (ie public/css/* and public/images/*):</p>
<pre class="ruby"><span class="ruby-identifier">use</span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Static</span>, <span class="ruby-value">:urls</span> <span class="ruby-operator">=></span> [<span class="ruby-string">"/css"</span>, <span class="ruby-string">"/images"</span>], <span class="ruby-value">:root</span> <span class="ruby-operator">=></span> <span class="ruby-string">"public"</span>
</pre>
<p>Serve all requests to / with “index.html” from the folder “public” in the current directory (ie public/index.html):</p>
<pre class="ruby"><span class="ruby-identifier">use</span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Static</span>, <span class="ruby-value">:urls</span> <span class="ruby-operator">=></span> {<span class="ruby-string">"/"</span> <span class="ruby-operator">=></span> <span class="ruby-string">'index.html'</span>}, <span class="ruby-value">:root</span> <span class="ruby-operator">=></span> <span class="ruby-string">'public'</span>
</pre>
<p>Serve all requests normally from the folder “public” in the current directory but uses index.html as default route for “/”</p>
<pre class="ruby"><span class="ruby-identifier">use</span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Static</span>, <span class="ruby-value">:urls</span> <span class="ruby-operator">=></span> [<span class="ruby-string">""</span>], <span class="ruby-value">:root</span> <span class="ruby-operator">=></span> <span class="ruby-string">'public'</span>, <span class="ruby-value">:index</span> <span class="ruby-operator">=></span>
<span class="ruby-string">'index.html'</span>
</pre>
<p>Set custom HTTP Headers for based on rules:</p>
<pre> use Rack::Static, :root => 'public',
:header_rules => [
[rule, {header_field => content, header_field => content}],
[rule, {header_field => content}]
]
Rules for selecting files:
1) All files
Provide the :all symbol
:all => Matches every file
2) Folders
Provide the folder path as a string
'/folder' or '/folder/subfolder' => Matches files in a certain folder
3) File Extensions
Provide the file extensions as an array
['css', 'js'] or %w(css js) => Matches files ending in .css or .js
4) Regular Expressions / Regexp
Provide a regular expression
%r{\.(?:css|js)\z} => Matches files ending in .css or .js
/\.(?:eot|ttf|otf|woff2|woff|svg)\z/ => Matches files ending in
the most common web font formats (.eot, .ttf, .otf, .woff2, .woff, .svg)
Note: This Regexp is available as a shortcut, using the :fonts rule
5) Font Shortcut
Provide the :fonts symbol
:fonts => Uses the Regexp rule stated right above to match all common web font endings
Rule Ordering:
Rules are applied in the order that they are provided.
List rather general rules above special ones.
Complete example use case including HTTP header rules:
use Rack::Static, :root => 'public',
:header_rules => [
# Cache all static files in public caches (e.g. Rack::Cache)
# as well as in the browser
[:all, {'Cache-Control' => 'public, max-age=31536000'}],
# Provide web fonts with cross-origin access-control-headers
# Firefox requires this when serving assets using a Content Delivery Network
[:fonts, {'Access-Control-Allow-Origin' => '*'}]
]</pre>
</section>
<section id="5Buntitled-5D" class="documentation-section">
<section id="public-class-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Class Methods</h3>
</header>
<div id="method-c-new" class="method-detail ">
<div class="method-heading">
<span class="method-name">new</span><span
class="method-args">(app, options = {})</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/static.rb, line 91</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">app</span>, <span class="ruby-identifier">options</span> = {})
<span class="ruby-ivar">@app</span> = <span class="ruby-identifier">app</span>
<span class="ruby-ivar">@urls</span> = <span class="ruby-identifier">options</span>[<span class="ruby-value">:urls</span>] <span class="ruby-operator">||</span> [<span class="ruby-string">"/favicon.ico"</span>]
<span class="ruby-ivar">@index</span> = <span class="ruby-identifier">options</span>[<span class="ruby-value">:index</span>]
<span class="ruby-ivar">@gzip</span> = <span class="ruby-identifier">options</span>[<span class="ruby-value">:gzip</span>]
<span class="ruby-ivar">@cascade</span> = <span class="ruby-identifier">options</span>[<span class="ruby-value">:cascade</span>]
<span class="ruby-identifier">root</span> = <span class="ruby-identifier">options</span>[<span class="ruby-value">:root</span>] <span class="ruby-operator">||</span> <span class="ruby-constant">Dir</span>.<span class="ruby-identifier">pwd</span>
<span class="ruby-comment"># HTTP Headers</span>
<span class="ruby-ivar">@header_rules</span> = <span class="ruby-identifier">options</span>[<span class="ruby-value">:header_rules</span>] <span class="ruby-operator">||</span> []
<span class="ruby-comment"># Allow for legacy :cache_control option while prioritizing global header_rules setting</span>
<span class="ruby-ivar">@header_rules</span>.<span class="ruby-identifier">unshift</span>([<span class="ruby-value">:all</span>, { <span class="ruby-constant">CACHE_CONTROL</span> <span class="ruby-operator">=></span> <span class="ruby-identifier">options</span>[<span class="ruby-value">:cache_control</span>] }]) <span class="ruby-keyword">if</span> <span class="ruby-identifier">options</span>[<span class="ruby-value">:cache_control</span>]
<span class="ruby-ivar">@file_server</span> = <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Files</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">root</span>)
<span class="ruby-keyword">end</span></pre>
</div>
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</section>
<section id="public-instance-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Instance Methods</h3>
</header>
<div id="method-i-add_index_root-3F" class="method-detail ">
<div class="method-heading">
<span class="method-name">add_index_root?</span><span
class="method-args">(path)</span>
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</div>
<div class="method-description">
<div class="method-source-code" id="add_index_root-3F-source">
<pre><span class="ruby-comment"># File lib/rack/static.rb, line 107</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">add_index_root?</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-ivar">@index</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">route_file</span>(<span class="ruby-identifier">path</span>) <span class="ruby-operator">&&</span> <span class="ruby-identifier">path</span>.<span class="ruby-identifier">end_with?</span>(<span class="ruby-string">'/'</span>)
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-applicable_rules" class="method-detail ">
<div class="method-heading">
<span class="method-name">applicable_rules</span><span
class="method-args">(path)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Convert HTTP header rules to HTTP headers</p>
<div class="method-source-code" id="applicable_rules-source">
<pre><span class="ruby-comment"># File lib/rack/static.rb, line 166</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">applicable_rules</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-ivar">@header_rules</span>.<span class="ruby-identifier">find_all</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">rule</span>, <span class="ruby-identifier">new_headers</span><span class="ruby-operator">|</span>
<span class="ruby-keyword">case</span> <span class="ruby-identifier">rule</span>
<span class="ruby-keyword">when</span> <span class="ruby-value">:all</span>
<span class="ruby-keyword">true</span>
<span class="ruby-keyword">when</span> <span class="ruby-value">:fonts</span>
<span class="ruby-regexp">/\.(?:ttf|otf|eot|woff2|woff|svg)\z/</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-keyword">when</span> <span class="ruby-constant">String</span>
<span class="ruby-identifier">path</span> = <span class="ruby-operator">::</span><span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Utils</span>.<span class="ruby-identifier">unescape</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-identifier">path</span>.<span class="ruby-identifier">start_with?</span>(<span class="ruby-identifier">rule</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">path</span>.<span class="ruby-identifier">start_with?</span>(<span class="ruby-string">'/'</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">rule</span>)
<span class="ruby-keyword">when</span> <span class="ruby-constant">Array</span>
<span class="ruby-regexp">/\.(#{rule.join('|')})\z/</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-keyword">when</span> <span class="ruby-constant">Regexp</span>
<span class="ruby-identifier">rule</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-keyword">else</span>
<span class="ruby-keyword">false</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-call" class="method-detail ">
<div class="method-heading">
<span class="method-name">call</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="call-source">
<pre><span class="ruby-comment"># File lib/rack/static.rb, line 123</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-identifier">path</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>]
<span class="ruby-keyword">if</span> <span class="ruby-identifier">can_serve</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">overwrite_file_path</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>] = (<span class="ruby-identifier">add_index_root?</span>(<span class="ruby-identifier">path</span>) <span class="ruby-operator">?</span> <span class="ruby-identifier">path</span> <span class="ruby-operator">+</span> <span class="ruby-ivar">@index</span> <span class="ruby-operator">:</span> <span class="ruby-ivar">@urls</span>[<span class="ruby-identifier">path</span>])
<span class="ruby-keyword">elsif</span> <span class="ruby-ivar">@gzip</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">env</span>[<span class="ruby-string">'HTTP_ACCEPT_ENCODING'</span>] <span class="ruby-operator">&&</span> <span class="ruby-regexp">/\bgzip\b/</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-identifier">env</span>[<span class="ruby-string">'HTTP_ACCEPT_ENCODING'</span>])
<span class="ruby-identifier">path</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>]
<span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>] <span class="ruby-operator">+=</span> <span class="ruby-string">'.gz'</span>
<span class="ruby-identifier">response</span> = <span class="ruby-ivar">@file_server</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>] = <span class="ruby-identifier">path</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">response</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">==</span> <span class="ruby-value">404</span>
<span class="ruby-identifier">response</span> = <span class="ruby-keyword">nil</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">response</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">==</span> <span class="ruby-value">304</span>
<span class="ruby-comment"># Do nothing, leave headers as is</span>
<span class="ruby-keyword">else</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">mime_type</span> = <span class="ruby-constant">Mime</span>.<span class="ruby-identifier">mime_type</span>(<span class="ruby-operator">::</span><span class="ruby-constant">File</span>.<span class="ruby-identifier">extname</span>(<span class="ruby-identifier">path</span>), <span class="ruby-string">'text/plain'</span>)
<span class="ruby-identifier">response</span>[<span class="ruby-value">1</span>][<span class="ruby-constant">CONTENT_TYPE</span>] = <span class="ruby-identifier">mime_type</span>
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">response</span>[<span class="ruby-value">1</span>][<span class="ruby-string">'Content-Encoding'</span>] = <span class="ruby-string">'gzip'</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">path</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>]
<span class="ruby-identifier">response</span> <span class="ruby-operator">||=</span> <span class="ruby-ivar">@file_server</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">if</span> <span class="ruby-ivar">@cascade</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">response</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">==</span> <span class="ruby-value">404</span>
<span class="ruby-keyword">return</span> <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">headers</span> = <span class="ruby-identifier">response</span>[<span class="ruby-value">1</span>]
<span class="ruby-identifier">applicable_rules</span>(<span class="ruby-identifier">path</span>).<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">rule</span>, <span class="ruby-identifier">new_headers</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">new_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">end</span>
<span class="ruby-identifier">response</span>
<span class="ruby-keyword">else</span>
<span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-can_serve" class="method-detail ">
<div class="method-heading">
<span class="method-name">can_serve</span><span
class="method-args">(path)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="can_serve-source">
<pre><span class="ruby-comment"># File lib/rack/static.rb, line 119</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">can_serve</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-identifier">route_file</span>(<span class="ruby-identifier">path</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">overwrite_file_path</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-overwrite_file_path" class="method-detail ">
<div class="method-heading">
<span class="method-name">overwrite_file_path</span><span
class="method-args">(path)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="overwrite_file_path-source">
<pre><span class="ruby-comment"># File lib/rack/static.rb, line 111</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">overwrite_file_path</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-ivar">@urls</span>.<span class="ruby-identifier">kind_of?</span>(<span class="ruby-constant">Hash</span>) <span class="ruby-operator">&&</span> <span class="ruby-ivar">@urls</span>.<span class="ruby-identifier">key?</span>(<span class="ruby-identifier">path</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">add_index_root?</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-route_file" class="method-detail ">
<div class="method-heading">
<span class="method-name">route_file</span><span
class="method-args">(path)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="route_file-source">
<pre><span class="ruby-comment"># File lib/rack/static.rb, line 115</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">route_file</span>(<span class="ruby-identifier">path</span>)
<span class="ruby-ivar">@urls</span>.<span class="ruby-identifier">kind_of?</span>(<span class="ruby-constant">Array</span>) <span class="ruby-operator">&&</span> <span class="ruby-ivar">@urls</span>.<span class="ruby-identifier">any?</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">url</span><span class="ruby-operator">|</span> <span class="ruby-identifier">path</span>.<span class="ruby-identifier">index</span>(<span class="ruby-identifier">url</span>) <span class="ruby-operator">==</span> <span class="ruby-value">0</span> }
<span class="ruby-keyword">end</span></pre>
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