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Diffstat (limited to 'deps/npm/node_modules/npm-profile/node_modules/make-fetch-happen/node_modules/agentkeepalive/lib/agent.js')
-rw-r--r-- | deps/npm/node_modules/npm-profile/node_modules/make-fetch-happen/node_modules/agentkeepalive/lib/agent.js | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/deps/npm/node_modules/npm-profile/node_modules/make-fetch-happen/node_modules/agentkeepalive/lib/agent.js b/deps/npm/node_modules/npm-profile/node_modules/make-fetch-happen/node_modules/agentkeepalive/lib/agent.js new file mode 100644 index 0000000000..a51ad597bc --- /dev/null +++ b/deps/npm/node_modules/npm-profile/node_modules/make-fetch-happen/node_modules/agentkeepalive/lib/agent.js @@ -0,0 +1,133 @@ +/** + * refer: + * * @atimb "Real keep-alive HTTP agent": https://gist.github.com/2963672 + * * https://github.com/joyent/node/blob/master/lib/http.js + * * https://github.com/joyent/node/blob/master/lib/https.js + * * https://github.com/joyent/node/blob/master/lib/_http_agent.js + */ + +'use strict'; + +const OriginalAgent = require('./_http_agent').Agent; +const ms = require('humanize-ms'); + +class Agent extends OriginalAgent { + constructor(options) { + options = options || {}; + options.keepAlive = options.keepAlive !== false; + // default is keep-alive and 15s free socket timeout + if (options.freeSocketKeepAliveTimeout === undefined) { + options.freeSocketKeepAliveTimeout = 15000; + } + // Legacy API: keepAliveTimeout should be rename to `freeSocketKeepAliveTimeout` + if (options.keepAliveTimeout) { + options.freeSocketKeepAliveTimeout = options.keepAliveTimeout; + } + options.freeSocketKeepAliveTimeout = ms(options.freeSocketKeepAliveTimeout); + + // Sets the socket to timeout after timeout milliseconds of inactivity on the socket. + // By default is double free socket keepalive timeout. + if (options.timeout === undefined) { + options.timeout = options.freeSocketKeepAliveTimeout * 2; + // make sure socket default inactivity timeout >= 30s + if (options.timeout < 30000) { + options.timeout = 30000; + } + } + options.timeout = ms(options.timeout); + + super(options); + + this.createSocketCount = 0; + this.createSocketCountLastCheck = 0; + + this.createSocketErrorCount = 0; + this.createSocketErrorCountLastCheck = 0; + + this.closeSocketCount = 0; + this.closeSocketCountLastCheck = 0; + + // socket error event count + this.errorSocketCount = 0; + this.errorSocketCountLastCheck = 0; + + this.requestCount = 0; + this.requestCountLastCheck = 0; + + this.timeoutSocketCount = 0; + this.timeoutSocketCountLastCheck = 0; + + this.on('free', s => { + this.requestCount++; + // last enter free queue timestamp + s.lastFreeTime = Date.now(); + }); + this.on('timeout', () => { + this.timeoutSocketCount++; + }); + this.on('close', () => { + this.closeSocketCount++; + }); + this.on('error', () => { + this.errorSocketCount++; + }); + } + + createSocket(req, options, cb) { + super.createSocket(req, options, (err, socket) => { + if (err) { + this.createSocketErrorCount++; + return cb(err); + } + if (this.keepAlive) { + // Disable Nagle's algorithm: http://blog.caustik.com/2012/04/08/scaling-node-js-to-100k-concurrent-connections/ + // https://fengmk2.com/benchmark/nagle-algorithm-delayed-ack-mock.html + socket.setNoDelay(true); + } + this.createSocketCount++; + cb(null, socket); + }); + } + + get statusChanged() { + const changed = this.createSocketCount !== this.createSocketCountLastCheck || + this.createSocketErrorCount !== this.createSocketErrorCountLastCheck || + this.closeSocketCount !== this.closeSocketCountLastCheck || + this.errorSocketCount !== this.errorSocketCountLastCheck || + this.timeoutSocketCount !== this.timeoutSocketCountLastCheck || + this.requestCount !== this.requestCountLastCheck; + if (changed) { + this.createSocketCountLastCheck = this.createSocketCount; + this.createSocketErrorCountLastCheck = this.createSocketErrorCount; + this.closeSocketCountLastCheck = this.closeSocketCount; + this.errorSocketCountLastCheck = this.errorSocketCount; + this.timeoutSocketCountLastCheck = this.timeoutSocketCount; + this.requestCountLastCheck = this.requestCount; + } + return changed; + } + + getCurrentStatus() { + return { + createSocketCount: this.createSocketCount, + createSocketErrorCount: this.createSocketErrorCount, + closeSocketCount: this.closeSocketCount, + errorSocketCount: this.errorSocketCount, + timeoutSocketCount: this.timeoutSocketCount, + requestCount: this.requestCount, + freeSockets: inspect(this.freeSockets), + sockets: inspect(this.sockets), + requests: inspect(this.requests), + }; + } +} + +module.exports = Agent; + +function inspect(obj) { + const res = {}; + for (const key in obj) { + res[key] = obj[key].length; + } + return res; +} |