Class: Protocol::Rack::Adapter::Generic
- Inherits:
-
Object
- Object
- Protocol::Rack::Adapter::Generic
- Defined in:
- lib/protocol/rack/adapter/generic.rb
Class Method Summary collapse
Instance Method Summary collapse
-
#call(request) ⇒ Object
Build a rack ‘env` from the incoming request and apply it to the rack middleware.
-
#failure_response(exception) ⇒ Object
Generate a suitable response for the given exception.
-
#initialize(app) ⇒ Generic
constructor
Initialize the rack adaptor middleware.
- #logger ⇒ Object
- #make_environment(request) ⇒ Object
-
#unwrap_headers(headers, env) ⇒ Object
Unwrap raw HTTP headers into the CGI-style expected by Rack middleware.
-
#unwrap_request(request, env) ⇒ Object
Process the incoming request into a valid rack ‘env`.
Constructor Details
#initialize(app) ⇒ Generic
Initialize the rack adaptor middleware.
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# File 'lib/protocol/rack/adapter/generic.rb', line 22 def initialize(app) @app = app raise ArgumentError, "App must be callable!" unless @app.respond_to?(:call) end |
Class Method Details
.wrap(app) ⇒ Object
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# File 'lib/protocol/rack/adapter/generic.rb', line 16 def self.wrap(app) self.new(app) end |
Instance Method Details
#call(request) ⇒ Object
Build a rack ‘env` from the incoming request and apply it to the rack middleware.
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# File 'lib/protocol/rack/adapter/generic.rb', line 90 def call(request) env = self.make_environment(request) status, headers, body = @app.call(env) # The status must always be an integer. unless status.is_a?(Integer) raise ArgumentError, "Status must be an integer!" end # Headers must always be a hash or equivalent. unless headers raise ArgumentError, "Headers must not be nil!" end headers, = self.wrap_headers(headers) return Response.wrap(env, status, headers, , body, request) rescue => exception Console.logger.error(self) {exception} body&.close if body.respond_to?(:close) env&.[](RACK_RESPONSE_FINISHED)&.each do |callback| callback.call(env, status, headers, exception) end return failure_response(exception) end |
#failure_response(exception) ⇒ Object
Generate a suitable response for the given exception.
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# File 'lib/protocol/rack/adapter/generic.rb', line 123 def failure_response(exception) Protocol::HTTP::Response.for_exception(exception) end |
#logger ⇒ Object
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# File 'lib/protocol/rack/adapter/generic.rb', line 28 def logger Console.logger end |
#make_environment(request) ⇒ Object
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# File 'lib/protocol/rack/adapter/generic.rb', line 81 def make_environment(request) { request: request } end |
#unwrap_headers(headers, env) ⇒ Object
Unwrap raw HTTP headers into the CGI-style expected by Rack middleware.
Rack separates multiple headers with the same key, into a single field with multiple lines.
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# File 'lib/protocol/rack/adapter/generic.rb', line 38 def unwrap_headers(headers, env) headers.each do |key, value| http_key = "HTTP_#{key.upcase.tr('-', '_')}" if current_value = env[http_key] env[http_key] = "#{current_value};#{value}" else env[http_key] = value end end end |
#unwrap_request(request, env) ⇒ Object
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# File 'lib/protocol/rack/adapter/generic.rb', line 59 def unwrap_request(request, env) if content_type = request.headers.delete('content-type') env[CGI::CONTENT_TYPE] = content_type end # In some situations we don't know the content length, e.g. when using chunked encoding, or when decompressing the body. if body = request.body and length = body.length env[CGI::CONTENT_LENGTH] = length.to_s end self.unwrap_headers(request.headers, env) # HTTP/2 prefers `:authority` over `host`, so we do this for backwards compatibility. env[CGI::HTTP_HOST] ||= request. if request.respond_to?(:remote_address) if remote_address = request.remote_address env[CGI::REMOTE_ADDR] = remote_address.ip_address if remote_address.ip? end end end |