module HTTPX::Plugins::Proxy::InstanceMethods

    # File lib/httpx/plugins/proxy.rb
159 def find_connection(request_uri, selector, options)
160   return super unless options.respond_to?(:proxy)
161 
162   if (next_proxy = request_uri.find_proxy)
163     return super(request_uri, selector, options.merge(proxy: Parameters.new(uri: next_proxy)))
164   end
165 
166   proxy = options.proxy
167 
168   return super unless proxy
169 
170   next_proxy = proxy.uri
171 
172   raise ProxyError, "Failed to connect to proxy" unless next_proxy
173 
174   raise ProxyError,
175         "#{next_proxy.scheme}: unsupported proxy protocol" unless options.supported_proxy_protocols.include?(next_proxy.scheme)
176 
177   if (no_proxy = proxy.no_proxy)
178     no_proxy = no_proxy.join(",") if no_proxy.is_a?(Array)
179 
180     # TODO: setting proxy to nil leaks the connection object in the pool
181     return super(request_uri, selector, options.merge(proxy: nil)) unless URI::Generic.use_proxy?(request_uri.host, next_proxy.host,
182                                                                                                   next_proxy.port, no_proxy)
183   end
184 
185   super(request_uri, selector, options.merge(proxy: proxy))
186 end