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@flow\n\nimport http from 'http';\nimport https from 'https';\nimport {\n boolean as parseBoolean,\n} from 'boolean';\nimport semver from 'semver';\nimport Logger from '../Logger';\nimport {\n HttpProxyAgent,\n HttpsProxyAgent,\n} from '../classes';\nimport {\n UnexpectedStateError,\n} from '../errors';\nimport {\n bindHttpMethod,\n isUrlMatchingNoProxy,\n parseProxyUrl,\n} from '../utilities';\nimport type {\n ProxyAgentConfigurationInputType,\n ProxyAgentConfigurationType,\n} from '../types';\nimport createProxyController from './createProxyController';\n\nconst httpGet = http.get;\nconst httpRequest = http.request;\nconst httpsGet = https.get;\nconst httpsRequest = https.request;\n\nconst log = Logger.child({\n namespace: 'createGlobalProxyAgent',\n});\n\nconst defaultConfigurationInput = {\n environmentVariableNamespace: undefined,\n forceGlobalAgent: undefined,\n socketConnectionTimeout: 60000,\n};\n\nconst omitUndefined = (subject) => {\n const keys = Object.keys(subject);\n\n const result = {};\n\n for (const key of keys) {\n const value = subject[key];\n\n if (value !== undefined) {\n result[key] = value;\n }\n }\n\n return result;\n};\n\nconst createConfiguration = (configurationInput: ProxyAgentConfigurationInputType): ProxyAgentConfigurationType => {\n // eslint-disable-next-line no-process-env\n const environment = process.env;\n\n const defaultConfiguration = {\n environmentVariableNamespace: typeof environment.GLOBAL_AGENT_ENVIRONMENT_VARIABLE_NAMESPACE === 'string' ? environment.GLOBAL_AGENT_ENVIRONMENT_VARIABLE_NAMESPACE : 'GLOBAL_AGENT_',\n forceGlobalAgent: typeof environment.GLOBAL_AGENT_FORCE_GLOBAL_AGENT === 'string' ? parseBoolean(environment.GLOBAL_AGENT_FORCE_GLOBAL_AGENT) : true,\n socketConnectionTimeout: typeof environment.GLOBAL_AGENT_SOCKET_CONNECTION_TIMEOUT === 'string' ? Number.parseInt(environment.GLOBAL_AGENT_SOCKET_CONNECTION_TIMEOUT, 10) : defaultConfigurationInput.socketConnectionTimeout,\n };\n\n // $FlowFixMe\n return {\n ...defaultConfiguration,\n ...omitUndefined(configurationInput),\n };\n};\n\nexport default (configurationInput: ProxyAgentConfigurationInputType = defaultConfigurationInput) => {\n const configuration = createConfiguration(configurationInput);\n\n const proxyController = createProxyController();\n\n // eslint-disable-next-line no-process-env\n proxyController.HTTP_PROXY = process.env[configuration.environmentVariableNamespace + 'HTTP_PROXY'] || null;\n\n // eslint-disable-next-line no-process-env\n proxyController.HTTPS_PROXY = process.env[configuration.environmentVariableNamespace + 'HTTPS_PROXY'] || null;\n\n // eslint-disable-next-line no-process-env\n proxyController.NO_PROXY = process.env[configuration.environmentVariableNamespace + 'NO_PROXY'] || null;\n\n log.info({\n configuration,\n state: proxyController,\n }, 'global agent has been initialized');\n\n const mustUrlUseProxy = (getProxy) => {\n return (url) => {\n if (!getProxy()) {\n return false;\n }\n\n if (!proxyController.NO_PROXY) {\n return true;\n }\n\n return !isUrlMatchingNoProxy(url, proxyController.NO_PROXY);\n };\n };\n\n const getUrlProxy = (getProxy) => {\n return () => {\n const proxy = getProxy();\n\n if (!proxy) {\n throw new UnexpectedStateError('HTTP(S) proxy must be configured.');\n }\n\n return parseProxyUrl(proxy);\n };\n };\n\n const getHttpProxy = () => {\n return proxyController.HTTP_PROXY;\n };\n\n const BoundHttpProxyAgent = class extends HttpProxyAgent {\n constructor () {\n super(\n () => {\n return getHttpProxy();\n },\n mustUrlUseProxy(getHttpProxy),\n getUrlProxy(getHttpProxy),\n http.globalAgent,\n configuration.socketConnectionTimeout,\n );\n }\n };\n\n const httpAgent = new BoundHttpProxyAgent();\n\n const getHttpsProxy = () => {\n return proxyController.HTTPS_PROXY || proxyController.HTTP_PROXY;\n };\n\n const BoundHttpsProxyAgent = class extends HttpsProxyAgent {\n constructor () {\n super(\n () => {\n return getHttpsProxy();\n },\n mustUrlUseProxy(getHttpsProxy),\n getUrlProxy(getHttpsProxy),\n https.globalAgent,\n configuration.socketConnectionTimeout,\n );\n }\n };\n\n const httpsAgent = new BoundHttpsProxyAgent();\n\n // Overriding globalAgent was added in v11.7.\n // @see https://nodejs.org/uk/blog/release/v11.7.0/\n if (semver.gte(process.version, 'v11.7.0')) {\n // @see https://github.com/facebook/flow/issues/7670\n // $FlowFixMe\n http.globalAgent = httpAgent;\n\n // $FlowFixMe\n https.globalAgent = httpsAgent;\n }\n\n // The reason this logic is used in addition to overriding http(s).globalAgent\n // is because there is no guarantee that we set http(s).globalAgent variable\n // before an instance of http(s).Agent has been already constructed by someone,\n // e.g. Stripe SDK creates instances of http(s).Agent at the top-level.\n // @see https://github.com/gajus/global-agent/pull/13\n //\n // We still want to override http(s).globalAgent when possible to enable logic\n // in `bindHttpMethod`.\n if (semver.gte(process.version, 'v10.0.0')) {\n // $FlowFixMe\n http.get = bindHttpMethod(httpGet, httpAgent, configuration.forceGlobalAgent);\n\n // $FlowFixMe\n http.request = bindHttpMethod(httpRequest, httpAgent, configuration.forceGlobalAgent);\n\n // $FlowFixMe\n https.get = bindHttpMethod(httpsGet, httpsAgent, configuration.forceGlobalAgent);\n\n // $FlowFixMe\n https.request = bindHttpMethod(httpsRequest, httpsAgent, configuration.forceGlobalAgent);\n } else {\n log.warn('attempt to initialize global-agent in unsupported Node.js version was ignored');\n }\n\n return proxyController;\n};\n"],"file":"createGlobalProxyAgent.js"} |