Class: FaradayMiddleware::RackCompatible
- Inherits:
-
Object
- Object
- FaradayMiddleware::RackCompatible
- Defined in:
- lib/faraday_middleware/rack_compatible.rb
Overview
Wraps a handler originally written for Rack to make it compatible with Faraday.
Experimental. Only handles changes in request headers.
Constant Summary collapse
- NonPrefixedHeaders =
%w[CONTENT_LENGTH CONTENT_TYPE]
Instance Method Summary collapse
- #call(env) ⇒ Object
- #finalize_response(env, rack_response) ⇒ Object
- #headers_to_rack(env) ⇒ Object
-
#initialize(app, rack_handler, *args) ⇒ RackCompatible
constructor
A new instance of RackCompatible.
-
#prepare_env(faraday_env) ⇒ Object
faraday to rack-compatible.
-
#restore_env(rack_env) ⇒ Object
rack to faraday-compatible.
Constructor Details
#initialize(app, rack_handler, *args) ⇒ RackCompatible
Returns a new instance of RackCompatible.
8 9 10 11 12 13 14 15 16 17 |
# File 'lib/faraday_middleware/rack_compatible.rb', line 8 def initialize(app, rack_handler, *args) # tiny middleware that decomposes a Faraday::Response to standard Rack # array: [status, headers, body] compatible_app = lambda do |rack_env| env = restore_env(rack_env) response = app.call(env) [response.status, response.headers, Array(response.body)] end @rack = rack_handler.new(compatible_app, *args) end |
Instance Method Details
#call(env) ⇒ Object
19 20 21 22 23 |
# File 'lib/faraday_middleware/rack_compatible.rb', line 19 def call(env) rack_env = prepare_env(env) rack_response = @rack.call(rack_env) finalize_response(env, rack_response) end |
#finalize_response(env, rack_response) ⇒ Object
73 74 75 76 77 78 79 80 81 82 83 84 |
# File 'lib/faraday_middleware/rack_compatible.rb', line 73 def finalize_response(env, rack_response) status, headers, body = rack_response body = body.inject() { |str, part| str << part } headers = Faraday::Utils::Headers.new(headers) unless Faraday::Utils::Headers === headers env.update :status => status.to_i, :body => body, :response_headers => headers env[:response] ||= Faraday::Response.new(env) env[:response] end |
#headers_to_rack(env) ⇒ Object
44 45 46 47 48 49 50 51 52 |
# File 'lib/faraday_middleware/rack_compatible.rb', line 44 def headers_to_rack(env) rack_env = {} env[:request_headers].each do |name, value| name = name.upcase.tr('-', '_') name = "HTTP_#{name}" unless NonPrefixedHeaders.include? name rack_env[name] = value end rack_env end |
#prepare_env(faraday_env) ⇒ Object
faraday to rack-compatible
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 |
# File 'lib/faraday_middleware/rack_compatible.rb', line 28 def prepare_env(faraday_env) env = headers_to_rack(faraday_env) url = faraday_env[:url] env['rack.url_scheme'] = url.scheme env['PATH_INFO'] = url.path env['SERVER_PORT'] = url.respond_to?(:inferred_port) ? url.inferred_port : url.port env['QUERY_STRING'] = url.query env['REQUEST_METHOD'] = faraday_env[:method].to_s.upcase env['rack.errors'] ||= StringIO.new env['faraday'] = faraday_env env end |
#restore_env(rack_env) ⇒ Object
rack to faraday-compatible
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 |
# File 'lib/faraday_middleware/rack_compatible.rb', line 55 def restore_env(rack_env) env = rack_env.fetch('faraday') headers = env[:request_headers] headers.clear rack_env.each do |name, value| next unless String === name if NonPrefixedHeaders.include? name or name.index('HTTP_') == 0 name = name.sub(/^HTTP_/, '').downcase.tr('_', '-') headers[name] = value end end env[:method] = rack_env['REQUEST_METHOD'].downcase.to_sym env[:rack_errors] = rack_env['rack.errors'] env end |