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@flow\n\nimport {\n serializeError,\n} from 'serialize-error';\nimport {\n boolean,\n} from 'boolean';\nimport Logger from '../Logger';\nimport type {\n AgentType,\n GetUrlProxyMethodType,\n IsProxyConfiguredMethodType,\n MustUrlUseProxyMethodType,\n ProtocolType,\n} from '../types';\n\nconst log = Logger.child({\n namespace: 'Agent',\n});\n\nlet requestId = 0;\n\nclass Agent {\n defaultPort: number;\n\n protocol: ProtocolType;\n\n fallbackAgent: AgentType;\n\n isProxyConfigured: IsProxyConfiguredMethodType;\n\n mustUrlUseProxy: MustUrlUseProxyMethodType;\n\n getUrlProxy: GetUrlProxyMethodType;\n\n socketConnectionTimeout: number;\n\n constructor (\n isProxyConfigured: IsProxyConfiguredMethodType,\n mustUrlUseProxy: MustUrlUseProxyMethodType,\n getUrlProxy: GetUrlProxyMethodType,\n fallbackAgent: AgentType,\n socketConnectionTimeout: number,\n ) {\n this.fallbackAgent = fallbackAgent;\n this.isProxyConfigured = isProxyConfigured;\n this.mustUrlUseProxy = mustUrlUseProxy;\n this.getUrlProxy = getUrlProxy;\n this.socketConnectionTimeout = socketConnectionTimeout;\n }\n\n addRequest (request: *, configuration: *) {\n let requestUrl;\n\n // It is possible that addRequest was constructed for a proxied request already, e.g.\n // \"request\" package does this when it detects that a proxy should be used\n // https://github.com/request/request/blob/212570b6971a732b8dd9f3c73354bcdda158a737/request.js#L402\n // https://gist.github.com/gajus/e2074cd3b747864ffeaabbd530d30218\n if (request.path.startsWith('http://') || request.path.startsWith('https://')) {\n requestUrl = request.path;\n } else {\n requestUrl = this.protocol + '//' + (configuration.hostname || configuration.host) + (configuration.port === 80 || configuration.port === 443 ? '' : ':' + configuration.port) + request.path;\n }\n\n if (!this.isProxyConfigured()) {\n log.trace({\n destination: requestUrl,\n }, 'not proxying request; GLOBAL_AGENT.HTTP_PROXY is not configured');\n\n // $FlowFixMe It appears that Flow is missing the method description.\n this.fallbackAgent.addRequest(request, configuration);\n\n return;\n }\n\n if (!this.mustUrlUseProxy(requestUrl)) {\n log.trace({\n destination: requestUrl,\n }, 'not proxying request; url matches GLOBAL_AGENT.NO_PROXY');\n\n // $FlowFixMe It appears that Flow is missing the method description.\n this.fallbackAgent.addRequest(request, configuration);\n\n return;\n }\n\n const currentRequestId = requestId++;\n\n const proxy = this.getUrlProxy(requestUrl);\n\n if (this.protocol === 'http:') {\n request.path = requestUrl;\n\n if (proxy.authorization) {\n request.setHeader('proxy-authorization', 'Basic ' + Buffer.from(proxy.authorization).toString('base64'));\n }\n }\n\n log.trace({\n destination: requestUrl,\n proxy: 'http://' + proxy.hostname + ':' + proxy.port,\n requestId: currentRequestId,\n }, 'proxying request');\n\n request.on('error', (error) => {\n log.error({\n error: serializeError(error),\n }, 'request error');\n });\n\n request.once('response', (response) => {\n log.trace({\n headers: response.headers,\n requestId: currentRequestId,\n statusCode: response.statusCode,\n }, 'proxying response');\n });\n\n request.shouldKeepAlive = false;\n\n const connectionConfiguration = {\n host: configuration.hostname || configuration.host,\n port: configuration.port || 80,\n proxy,\n tls: {},\n };\n\n // add optional tls options for https requests.\n // @see https://nodejs.org/docs/latest-v12.x/api/https.html#https_https_request_url_options_callback :\n // > The following additional options from tls.connect()\n // > - https://nodejs.org/docs/latest-v12.x/api/tls.html#tls_tls_connect_options_callback -\n // > are also accepted:\n // > ca, cert, ciphers, clientCertEngine, crl, dhparam, ecdhCurve, honorCipherOrder,\n // > key, passphrase, pfx, rejectUnauthorized, secureOptions, secureProtocol, servername, sessionIdContext.\n if (this.protocol === 'https:') {\n connectionConfiguration.tls = {\n ca: configuration.ca,\n cert: configuration.cert,\n ciphers: configuration.ciphers,\n clientCertEngine: configuration.clientCertEngine,\n crl: configuration.crl,\n dhparam: configuration.dhparam,\n ecdhCurve: configuration.ecdhCurve,\n honorCipherOrder: configuration.honorCipherOrder,\n key: configuration.key,\n passphrase: configuration.passphrase,\n pfx: configuration.pfx,\n rejectUnauthorized: configuration.rejectUnauthorized,\n secureOptions: configuration.secureOptions,\n secureProtocol: configuration.secureProtocol,\n servername: configuration.servername || connectionConfiguration.host,\n sessionIdContext: configuration.sessionIdContext,\n };\n\n // This is not ideal because there is no way to override this setting using `tls` configuration if `NODE_TLS_REJECT_UNAUTHORIZED=0`.\n // However, popular HTTP clients (such as https://github.com/sindresorhus/got) come with pre-configured value for `rejectUnauthorized`,\n // which makes it impossible to override that value globally and respect `rejectUnauthorized` for specific requests only.\n //\n // eslint-disable-next-line no-process-env\n if (typeof process.env.NODE_TLS_REJECT_UNAUTHORIZED === 'string' && boolean(process.env.NODE_TLS_REJECT_UNAUTHORIZED) === false) {\n connectionConfiguration.tls.rejectUnauthorized = false;\n }\n }\n\n // $FlowFixMe It appears that Flow is missing the method description.\n this.createConnection(connectionConfiguration, (error, socket) => {\n log.trace({\n target: connectionConfiguration,\n }, 'connecting');\n\n // @see https://github.com/nodejs/node/issues/5757#issuecomment-305969057\n if (socket) {\n socket.setTimeout(this.socketConnectionTimeout, () => {\n socket.destroy();\n });\n\n socket.once('connect', () => {\n log.trace({\n target: connectionConfiguration,\n }, 'connected');\n\n socket.setTimeout(0);\n });\n\n socket.once('secureConnect', () => {\n log.trace({\n target: connectionConfiguration,\n }, 'connected (secure)');\n\n socket.setTimeout(0);\n });\n }\n\n if (error) {\n request.emit('error', error);\n } else {\n log.debug('created socket');\n\n socket.on('error', (socketError) => {\n log.error({\n error: serializeError(socketError),\n }, 'socket error');\n });\n\n request.onSocket(socket);\n }\n });\n }\n}\n\nexport default Agent;\n"],"file":"Agent.js"} |