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.
22 23 24 25 26 |
# 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
16 17 18 |
# 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.
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 |
# File 'lib/protocol/rack/adapter/generic.rb', line 95 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.
128 129 130 |
# File 'lib/protocol/rack/adapter/generic.rb', line 128 def failure_response(exception) Protocol::HTTP::Response.for_exception(exception) end |
#logger ⇒ Object
28 29 30 |
# File 'lib/protocol/rack/adapter/generic.rb', line 28 def logger Console.logger end |
#make_environment(request) ⇒ Object
86 87 88 89 90 |
# File 'lib/protocol/rack/adapter/generic.rb', line 86 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.
38 39 40 41 42 43 44 45 46 47 48 |
# 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
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 |
# 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) # For the sake of compatibility, we set the `HTTP_UPGRADE` header to the requested protocol. if protocol = request.protocol and request.version.start_with?('HTTP/1') env[CGI::HTTP_UPGRADE] = Array(protocol).join(",") end # 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 |