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files >> //lib/node_modules/npm/node_modules/got/index.js
'use strict'; const EventEmitter = require('events'); const http = require('http'); const https = require('https'); const PassThrough = require('stream').PassThrough; const urlLib = require('url'); const querystring = require('querystring'); const duplexer3 = require('duplexer3'); const isStream = require('is-stream'); const getStream = require('get-stream'); const timedOut = require('timed-out'); const urlParseLax = require('url-parse-lax'); const lowercaseKeys = require('lowercase-keys'); const isRedirect = require('is-redirect'); const unzipResponse = require('unzip-response'); const createErrorClass = require('create-error-class'); const isRetryAllowed = require('is-retry-allowed'); const Buffer = require('safe-buffer').Buffer; const pkg = require('./package'); function requestAsEventEmitter(opts) { opts = opts || {}; const ee = new EventEmitter(); const requestUrl = opts.href || urlLib.resolve(urlLib.format(opts), opts.path); let redirectCount = 0; let retryCount = 0; let redirectUrl; const get = opts => { const fn = opts.protocol === 'https:' ? https : http; const req = fn.request(opts, res => { const statusCode = res.statusCode; if (isRedirect(statusCode) && opts.followRedirect && 'location' in res.headers && (opts.method === 'GET' || opts.method === 'HEAD')) { res.resume(); if (++redirectCount > 10) { ee.emit('error', new got.MaxRedirectsError(statusCode, opts), null, res); return; } const bufferString = Buffer.from(res.headers.location, 'binary').toString(); redirectUrl = urlLib.resolve(urlLib.format(opts), bufferString); const redirectOpts = Object.assign({}, opts, urlLib.parse(redirectUrl)); ee.emit('redirect', res, redirectOpts); get(redirectOpts); return; } setImmediate(() => { const response = typeof unzipResponse === 'function' && req.method !== 'HEAD' ? unzipResponse(res) : res; response.url = redirectUrl || requestUrl; response.requestUrl = requestUrl; ee.emit('response', response); }); }); req.once('error', err => { const backoff = opts.retries(++retryCount, err); if (backoff) { setTimeout(get, backoff, opts); return; } ee.emit('error', new got.RequestError(err, opts)); }); if (opts.gotTimeout) { timedOut(req, opts.gotTimeout); } setImmediate(() => { ee.emit('request', req); }); }; get(opts); return ee; } function asPromise(opts) { return new Promise((resolve, reject) => { const ee = requestAsEventEmitter(opts); ee.on('request', req => { if (isStream(opts.body)) { opts.body.pipe(req); opts.body = undefined; return; } req.end(opts.body); }); ee.on('response', res => { const stream = opts.encoding === null ? getStream.buffer(res) : getStream(res, opts); stream .catch(err => reject(new got.ReadError(err, opts))) .then(data => { const statusCode = res.statusCode; const limitStatusCode = opts.followRedirect ? 299 : 399; res.body = data; if (opts.json && res.body) { try { res.body = JSON.parse(res.body); } catch (e) { throw new got.ParseError(e, statusCode, opts, data); } } if (statusCode < 200 || statusCode > limitStatusCode) { throw new got.HTTPError(statusCode, opts); } resolve(res); }) .catch(err => { Object.defineProperty(err, 'response', {value: res}); reject(err); }); }); ee.on('error', reject); }); } function asStream(opts) { const input = new PassThrough(); const output = new PassThrough(); const proxy = duplexer3(input, output); if (opts.json) { throw new Error('got can not be used as stream when options.json is used'); } if (opts.body) { proxy.write = () => { throw new Error('got\'s stream is not writable when options.body is used'); }; } const ee = requestAsEventEmitter(opts); ee.on('request', req => { proxy.emit('request', req); if (isStream(opts.body)) { opts.body.pipe(req); return; } if (opts.body) { req.end(opts.body); return; } if (opts.method === 'POST' || opts.method === 'PUT' || opts.method === 'PATCH') { input.pipe(req); return; } req.end(); }); ee.on('response', res => { const statusCode = res.statusCode; res.pipe(output); if (statusCode < 200 || statusCode > 299) { proxy.emit('error', new got.HTTPError(statusCode, opts), null, res); return; } proxy.emit('response', res); }); ee.on('redirect', proxy.emit.bind(proxy, 'redirect')); ee.on('error', proxy.emit.bind(proxy, 'error')); return proxy; } function normalizeArguments(url, opts) { if (typeof url !== 'string' && typeof url !== 'object') { throw new Error(`Parameter \`url\` must be a string or object, not ${typeof url}`); } if (typeof url === 'string') { url = url.replace(/^unix:/, 'http://$&'); url = urlParseLax(url); if (url.auth) { throw new Error('Basic authentication must be done with auth option'); } } opts = Object.assign( { protocol: 'http:', path: '', retries: 5 }, url, opts ); opts.headers = Object.assign({ 'user-agent': `${pkg.name}/${pkg.version} (https://github.com/sindresorhus/got)`, 'accept-encoding': 'gzip,deflate' }, lowercaseKeys(opts.headers)); const query = opts.query; if (query) { if (typeof query !== 'string') { opts.query = querystring.stringify(query); } opts.path = `${opts.path.split('?')[0]}?${opts.query}`; delete opts.query; } if (opts.json && opts.headers.accept === undefined) { opts.headers.accept = 'application/json'; } let body = opts.body; if (body) { if (typeof body !== 'string' && !(body !== null && typeof body === 'object')) { throw new Error('options.body must be a ReadableStream, string, Buffer or plain Object'); } opts.method = opts.method || 'POST'; if (isStream(body) && typeof body.getBoundary === 'function') { // Special case for https://github.com/form-data/form-data opts.headers['content-type'] = opts.headers['content-type'] || `multipart/form-data; boundary=${body.getBoundary()}`; } else if (body !== null && typeof body === 'object' && !Buffer.isBuffer(body) && !isStream(body)) { opts.headers['content-type'] = opts.headers['content-type'] || 'application/x-www-form-urlencoded'; body = opts.body = querystring.stringify(body); } if (opts.headers['content-length'] === undefined && opts.headers['transfer-encoding'] === undefined && !isStream(body)) { const length = typeof body === 'string' ? Buffer.byteLength(body) : body.length; opts.headers['content-length'] = length; } } opts.method = (opts.method || 'GET').toUpperCase(); if (opts.hostname === 'unix') { const matches = /(.+):(.+)/.exec(opts.path); if (matches) { opts.socketPath = matches[1]; opts.path = matches[2]; opts.host = null; } } if (typeof opts.retries !== 'function') { const retries = opts.retries; opts.retries = (iter, err) => { if (iter > retries || !isRetryAllowed(err)) { return 0; } const noise = Math.random() * 100; return ((1 << iter) * 1000) + noise; }; } if (opts.followRedirect === undefined) { opts.followRedirect = true; } if (opts.timeout) { opts.gotTimeout = opts.timeout; delete opts.timeout; } return opts; } function got(url, opts) { try { return asPromise(normalizeArguments(url, opts)); } catch (err) { return Promise.reject(err); } } const helpers = [ 'get', 'post', 'put', 'patch', 'head', 'delete' ]; helpers.forEach(el => { got[el] = (url, opts) => got(url, Object.assign({}, opts, {method: el})); }); got.stream = (url, opts) => asStream(normalizeArguments(url, opts)); for (const el of helpers) { got.stream[el] = (url, opts) => got.stream(url, Object.assign({}, opts, {method: el})); } function stdError(error, opts) { if (error.code !== undefined) { this.code = error.code; } Object.assign(this, { message: error.message, host: opts.host, hostname: opts.hostname, method: opts.method, path: opts.path }); } got.RequestError = createErrorClass('RequestError', stdError); got.ReadError = createErrorClass('ReadError', stdError); got.ParseError = createErrorClass('ParseError', function (e, statusCode, opts, data) { stdError.call(this, e, opts); this.statusCode = statusCode; this.statusMessage = http.STATUS_CODES[this.statusCode]; this.message = `${e.message} in "${urlLib.format(opts)}": \n${data.slice(0, 77)}...`; }); got.HTTPError = createErrorClass('HTTPError', function (statusCode, opts) { stdError.call(this, {}, opts); this.statusCode = statusCode; this.statusMessage = http.STATUS_CODES[this.statusCode]; this.message = `Response code ${this.statusCode} (${this.statusMessage})`; }); got.MaxRedirectsError = createErrorClass('MaxRedirectsError', function (statusCode, opts) { stdError.call(this, {}, opts); this.statusCode = statusCode; this.statusMessage = http.STATUS_CODES[this.statusCode]; this.message = 'Redirected 10 times. Aborting.'; }); module.exports = got;
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