| module.exports = simpleGet |
| |
| var concat = require('simple-concat') |
| var http = require('http') |
| var https = require('https') |
| var once = require('once') |
| var querystring = require('querystring') |
| var decompressResponse = require('decompress-response') // excluded from browser build |
| var url = require('url') |
| |
| function simpleGet (opts, cb) { |
| opts = typeof opts === 'string' ? {url: opts} : Object.assign({}, opts) |
| cb = once(cb) |
| |
| opts.headers = Object.assign({}, opts.headers) |
| |
| Object.keys(opts.headers).forEach(function (h) { |
| if (h.toLowerCase() !== h) { |
| opts.headers[h.toLowerCase()] = opts.headers[h] |
| delete opts.headers[h] |
| } |
| }) |
| |
| if (opts.url) { |
| var loc = url.parse(opts.url) |
| if (loc.hostname) opts.hostname = loc.hostname |
| if (loc.port) opts.port = loc.port |
| if (loc.protocol) opts.protocol = loc.protocol |
| if (loc.auth) opts.auth = loc.auth |
| opts.path = loc.path |
| delete opts.url |
| } |
| |
| if (opts.maxRedirects == null) opts.maxRedirects = 10 |
| if (opts.method) opts.method = opts.method.toUpperCase() |
| |
| var body |
| if (opts.body) { |
| body = opts.json && !isStream(opts.body) ? JSON.stringify(opts.body) : opts.body |
| } else if (opts.form) { |
| body = typeof opts.form === 'string' ? opts.form : querystring.stringify(opts.form) |
| opts.headers['content-type'] = 'application/x-www-form-urlencoded' |
| } |
| delete opts.body; delete opts.form |
| |
| if (body) { |
| if (!opts.method) opts.method = 'POST' |
| if (!isStream(body)) opts.headers['content-length'] = Buffer.byteLength(body) |
| if (opts.json) opts.headers['content-type'] = 'application/json' |
| } |
| |
| if (opts.json) opts.headers.accept = 'application/json' |
| if (!opts.headers['accept-encoding']) opts.headers['accept-encoding'] = 'gzip, deflate' // Prefer gzip |
| |
| var protocol = opts.protocol === 'https:' ? https : http // Support http/https urls |
| var req = protocol.request(opts, function (res) { |
| if (res.statusCode >= 300 && res.statusCode < 400 && 'location' in res.headers) { |
| opts.url = res.headers.location // Follow 3xx redirects |
| delete opts.headers.host // Discard `host` header on redirect (see #32) |
| res.resume() // Discard response |
| |
| if ((res.statusCode === 301 || res.statusCode === 302) && opts.method === 'POST') { |
| opts.method = 'GET' // On 301/302 redirect, change POST to GET (see #35) |
| delete opts.headers['content-length'] |
| delete opts.headers['content-type'] |
| } |
| |
| if (opts.maxRedirects === 0) return cb(new Error('too many redirects')) |
| opts.maxRedirects -= 1 |
| return simpleGet(opts, cb) |
| } |
| |
| var tryUnzip = typeof decompressResponse === 'function' && opts.method !== 'HEAD' |
| cb(null, tryUnzip ? decompressResponse(res) : res) |
| }) |
| req.on('timeout', function () { |
| req.abort() |
| cb(new Error('Request timed out')) |
| }) |
| req.on('error', cb) |
| |
| if (body && isStream(body)) body.on('error', cb).pipe(req) |
| else req.end(body) |
| |
| return req |
| } |
| |
| simpleGet.concat = function (opts, cb) { |
| return simpleGet(opts, function (err, res) { |
| if (err) return cb(err) |
| concat(res, function (err, data) { |
| if (err) return cb(err) |
| if (opts.json) { |
| try { |
| data = JSON.parse(data.toString()) |
| } catch (err) { |
| return cb(err, res, data) |
| } |
| } |
| cb(null, res, data) |
| }) |
| }) |
| } |
| |
| ;['get', 'post', 'put', 'patch', 'head', 'delete'].forEach(function (method) { |
| simpleGet[method] = function (opts, cb) { |
| if (typeof opts === 'string') opts = {url: opts} |
| opts.method = method.toUpperCase() |
| return simpleGet(opts, cb) |
| } |
| }) |
| |
| function isStream (obj) { return typeof obj.pipe === 'function' } |