Class: Protocol::HTTP::ContentEncoding
- Inherits:
-
Middleware
- Object
- Methods
- Middleware
- Protocol::HTTP::ContentEncoding
- Defined in:
- lib/protocol/http/content_encoding.rb
Overview
Encode a response according the the request’s acceptable encodings.
Constant Summary collapse
- DEFAULT_WRAPPERS =
{ 'gzip' => Body::Deflate.method(:for) }
- DEFAULT_CONTENT_TYPES =
%r{^(text/.*?)|(.*?/json)|(.*?/javascript)$}
Constants inherited from Methods
Methods::CONNECT, Methods::DELETE, Methods::GET, Methods::HEAD, Methods::LINK, Methods::OPTIONS, Methods::PATCH, Methods::POST, Methods::PUT, Methods::TRACE, Methods::UNLINK
Instance Attribute Summary
Attributes inherited from Middleware
Instance Method Summary collapse
- #call(request) ⇒ Object
-
#initialize(app, content_types = DEFAULT_CONTENT_TYPES, wrappers = DEFAULT_WRAPPERS) ⇒ ContentEncoding
constructor
A new instance of ContentEncoding.
Methods inherited from Middleware
Methods inherited from Methods
Constructor Details
#initialize(app, content_types = DEFAULT_CONTENT_TYPES, wrappers = DEFAULT_WRAPPERS) ⇒ ContentEncoding
Returns a new instance of ContentEncoding.
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# File 'lib/protocol/http/content_encoding.rb', line 38 def initialize(app, content_types = DEFAULT_CONTENT_TYPES, wrappers = DEFAULT_WRAPPERS) super(app) @content_types = content_types @wrappers = wrappers end |
Instance Method Details
#call(request) ⇒ Object
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# File 'lib/protocol/http/content_encoding.rb', line 45 def call(request) response = super # Early exit if the response has already specified a content-encoding. return response if response.headers['content-encoding'] # This is a very tricky issue, so we avoid it entirely. # https://lists.w3.org/Archives/Public/ietf-http-wg/2014JanMar/1179.html return response if response.partial? # Ensure that caches are aware we are varying the response based on the accept-encoding request header: response.headers.add('vary', 'accept-encoding') # TODO use http-accept and sort by priority if !response.body.empty? and accept_encoding = request.headers['accept-encoding'] if content_type = response.headers['content-type'] and @content_types =~ content_type body = response.body accept_encoding.each do |name| if wrapper = @wrappers[name] response.headers['content-encoding'] = name body = wrapper.call(body) break end end response.body = body end end return response end |