701 lines
22 KiB
JavaScript
701 lines
22 KiB
JavaScript
'use strict';
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var http = require('http');
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var https = require('https');
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var url = require('url');
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var os = require('os');
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var pkg = require('./package.json');
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var fs = require('fs'); // only for streams
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var _defaults = {
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sendImmediately: true,
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method: '',
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headers: {},
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useQuerystring: false,
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followRedirect: true,
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followAllRedirects: false,
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followOriginalHttpMethod: false,
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maxRedirects: 10,
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removeRefererHeader: false,
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// encoding: undefined,
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// stream: false, // TODO allow a stream?
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gzip: false
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//, body: undefined
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//, json: undefined
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};
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var _keys = Object.keys(_defaults).concat([
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'encoding',
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'stream',
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'body',
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'json',
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'form',
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'auth',
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'formData',
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'FormData',
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'userAgent' // non-standard for request.js
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]);
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function debug() {
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if (module.exports.debug) {
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console.log.apply(console, arguments);
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}
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}
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function mergeOrDelete(defaults, updates) {
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Object.keys(defaults).forEach(function (key) {
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if (!(key in updates)) {
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updates[key] = defaults[key];
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return;
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}
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// neither accept the prior default nor define an explicit value
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// CRDT probs...
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if ('undefined' === typeof updates[key]) {
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delete updates[key];
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} else if (
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'object' === typeof defaults[key] &&
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'object' === typeof updates[key]
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) {
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updates[key] = mergeOrDelete(defaults[key], updates[key]);
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}
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});
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return updates;
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}
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// retrieves an existing header, case-sensitive
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function getHeaderName(reqOpts, header) {
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var headerNames = {};
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Object.keys(reqOpts.headers).forEach(function (casedName) {
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headerNames[casedName.toLowerCase()] = casedName;
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});
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// returns the key, which in erroneous cases could be an empty string
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return headerNames[header.toLowerCase()];
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}
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// returns whether or not a header exists, case-insensitive
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function hasHeader(reqOpts, header) {
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return 'undefined' !== typeof getHeaderName(reqOpts, header);
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}
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function toJSONifier(keys) {
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return function () {
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var obj = {};
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var me = this;
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keys.forEach(function (key) {
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if (me[key] && 'function' === typeof me[key].toJSON) {
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obj[key] = me[key].toJSON();
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} else {
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obj[key] = me[key];
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}
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});
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return obj;
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};
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}
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function setupPipe(resp, opts) {
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// make the response await-able
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var resolve;
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var reject;
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var p = new Promise(function (_resolve, _reject) {
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resolve = _resolve;
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reject = _reject;
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});
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// or an existing write stream
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if ('function' === typeof opts.stream.pipe) {
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if (opts.debug) {
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console.debug('[@root/request] stream piped');
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}
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resp.pipe(opts.stream);
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}
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resp.once('error', function (e) {
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if (opts.debug) {
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console.debug("[@root/request] stream 'error'");
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console.error(e.stack);
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}
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resp.destroy();
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if ('function' === opts.stream.destroy) {
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opts.stream.destroy(e);
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}
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reject(e);
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});
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resp.once('end', function () {
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if (opts.debug) {
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console.debug("[@root/request] stream 'end'");
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}
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if ('function' === opts.stream.destroy) {
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opts.stream.end();
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// this will close the stream (i.e. sync to disk)
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opts.stream.destroy();
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}
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});
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resp.once('close', function () {
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if (opts.debug) {
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console.debug("[@root/request] stream 'close'");
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}
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resolve();
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});
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return p;
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}
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function handleResponse(resp, opts, cb) {
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// body can be buffer, string, or json
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if (null === opts.encoding) {
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resp._body = [];
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} else {
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resp.body = '';
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}
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resp._bodyLength = 0;
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resp.once('error', function (err) {
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cb(err, resp, resp.body);
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});
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resp.on('readable', function () {
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var chunk;
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while ((chunk = resp.read())) {
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if ('string' === typeof resp.body) {
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resp.body += chunk.toString(opts.encoding);
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} else {
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resp._body.push(chunk);
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resp._bodyLength += chunk.length;
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}
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}
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});
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resp.once('end', function () {
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if ('string' !== typeof resp.body) {
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if (1 === resp._body.length) {
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resp.body = resp._body[0];
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} else {
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resp.body = Buffer.concat(resp._body, resp._bodyLength);
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}
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resp._body = null;
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}
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if (opts.json && 'string' === typeof resp.body) {
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// TODO I would parse based on Content-Type
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// but request.js doesn't do that.
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try {
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resp.body = JSON.parse(resp.body);
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} catch (e) {
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// ignore
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}
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}
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debug('\n[urequest] resp.toJSON():');
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if (module.exports.debug) {
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debug(resp.toJSON());
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}
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if (opts.debug) {
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console.debug('[@root/request] Response Body:');
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console.debug(resp.body);
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}
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cb(null, resp, resp.body);
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});
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}
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/**
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* @param {any} defs - TODO enumerate defaults
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* @returns {Request}
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*/
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function setDefaults(defs) {
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defs = defs || {};
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/** @type {Request} */
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function urequestHelper(opts, cb) {
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//jshint maxcomplexity:42
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debug('\n[urequest] processed options:');
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debug(opts);
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var req;
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var finalOpts = {};
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// allow specifying a file
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if ('string' === typeof opts.stream) {
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if (opts.debug) {
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console.debug('[@root/request] creating file write stream');
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}
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try {
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opts.stream = fs.createWriteStream(opts.stream);
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} catch (e) {
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cb(e);
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return;
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}
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}
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function onResponse(resp) {
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var followRedirect;
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Object.keys(defs).forEach(function (key) {
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if (key in opts && 'undefined' !== typeof opts[key]) {
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return;
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}
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opts[key] = defs[key];
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});
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followRedirect = opts.followRedirect;
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// copied from WHATWG fetch
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resp.ok = false;
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if (resp.statusCode >= 200 && resp.statusCode < 300) {
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resp.ok = true;
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}
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resp.toJSON = toJSONifier([
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'statusCode',
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'body',
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'ok',
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'headers',
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'request'
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]);
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resp.request = req;
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resp.request.uri = url.parse(opts.url);
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//resp.request.method = opts.method;
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resp.request.headers = finalOpts.headers;
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resp.request.toJSON = toJSONifier(['uri', 'method', 'headers']);
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if (opts.debug) {
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console.debug('[@root/request] Response Headers:');
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console.debug(resp.toJSON());
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}
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if (
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followRedirect &&
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resp.headers.location &&
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-1 !== [301, 302, 307, 308].indexOf(resp.statusCode)
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) {
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debug('Following redirect: ' + resp.headers.location);
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if ('GET' !== opts.method && !opts.followAllRedirects) {
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followRedirect = false;
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}
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if (opts._redirectCount >= opts.maxRedirects) {
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followRedirect = false;
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}
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if ('function' === opts.followRedirect) {
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if (!opts.followRedirect(resp)) {
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followRedirect = false;
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}
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}
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if (followRedirect) {
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if (!opts.followOriginalHttpMethod) {
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opts.method = 'GET';
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opts.body = null;
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delete opts.headers[
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getHeaderName(opts, 'Content-Length')
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];
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delete opts.headers[
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getHeaderName(opts, 'Transfer-Encoding')
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];
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}
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if (opts.removeRefererHeader && opts.headers) {
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delete opts.headers.referer;
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}
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// TODO needs baseUrl, maybe test for host / socketPath?
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opts.url = resp.headers.location;
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opts.uri = url.parse(opts.url);
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return urequestHelper(opts, cb);
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}
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}
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if (opts.stream) {
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resp.stream = setupPipe(resp, opts);
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// can be string, buffer, or json... why not an async function too?
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resp.stream.body = async function () {
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handleResponse(resp, opts, cb);
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await resp.stream;
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return resp.body;
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};
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cb(null, resp);
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return;
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}
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handleResponse(resp, opts, cb);
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}
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var _body;
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var MyFormData;
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var form;
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var formHeaders;
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var requester;
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if (opts.body) {
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if (true === opts.json && 'string' !== typeof opts.body) {
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_body = JSON.stringify(opts.body);
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} else {
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_body = opts.body;
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}
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} else if (opts.json && true !== opts.json) {
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_body = JSON.stringify(opts.json);
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} else if (opts.form) {
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_body = Object.keys(opts.form)
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.filter(function (key) {
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if ('undefined' !== typeof opts.form[key]) {
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return true;
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}
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})
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.map(function (key) {
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return (
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encodeURIComponent(key) +
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'=' +
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encodeURIComponent(String(opts.form[key]))
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);
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})
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.join('&');
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opts.headers['Content-Type'] = 'application/x-www-form-urlencoded';
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}
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if ('string' === typeof _body) {
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_body = Buffer.from(_body);
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}
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Object.keys(opts.uri).forEach(function (key) {
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finalOpts[key] = opts.uri[key];
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});
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// A bug should be raised if request does it differently,
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// but I think we're supposed to pass all acceptable options
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// on to the raw http request
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[
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'family',
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'host',
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'localAddress',
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'agent',
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'createConnection',
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'timeout',
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'setHost'
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].forEach(function (key) {
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if (key in opts) {
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finalOpts[key] = opts[key];
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}
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});
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finalOpts.method = opts.method;
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finalOpts.headers = JSON.parse(JSON.stringify(opts.headers));
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var uaHeader = getHeaderName(finalOpts, 'User-Agent') || 'User-Agent';
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// set a default user-agent
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if (!finalOpts.headers[uaHeader]) {
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if (false === finalOpts.headers[uaHeader]) {
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delete finalOpts.headers[uaHeader];
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} else {
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finalOpts.headers[uaHeader] = getUserAgent(opts.userAgent);
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}
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}
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if (_body) {
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// Most APIs expect (or require) Content-Length except in the case of multipart uploads
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// Transfer-Encoding: Chunked (the default) is generally only well-supported downstream
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if (
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'undefined' !== typeof _body.byteLength ||
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'undefined' !== typeof _body.length
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) {
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finalOpts.headers['Content-Length'] =
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_body.byteLength || _body.length;
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}
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}
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if (opts.auth) {
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// if opts.uri specifies auth it will be parsed by url.parse and passed directly to the http module
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if ('string' !== typeof opts.auth) {
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opts.auth =
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(opts.auth.user || opts.auth.username || '') +
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':' +
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(opts.auth.pass || opts.auth.password || '');
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}
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if ('string' === typeof opts.auth) {
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finalOpts.auth = opts.auth;
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}
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if (false === opts.sendImmediately) {
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console.warn(
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'[Warn] setting `sendImmediately: false` is not yet supported. Please open an issue if this is an important feature that you need.'
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);
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}
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// [request-compat]
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if (opts.auth.bearer) {
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// having a shortcut for base64 encoding makes sense, but this? Eh, whatevs...
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finalOpts.header.Authorization = 'Bearer ' + opts.auth.bearer;
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}
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}
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if (opts.formData) {
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try {
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MyFormData = opts.FormData || require('form-data');
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// potential options https://github.com/felixge/node-combined-stream/blob/master/lib/combined_stream.js#L7-L15
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} catch (e) {
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console.error(
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'urequest does not include extra dependencies by default'
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);
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console.error(
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"if you need to use 'form-data' you may install it, like so:"
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);
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console.error(' npm install --save form-data');
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cb(e);
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return;
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}
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try {
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form = new MyFormData();
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Object.keys(opts.formData).forEach(function (key) {
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function add(key, data, opts) {
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if (data.value) {
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opts = data.options;
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data = data.value;
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}
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form.append(key, data, opts);
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}
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if (Array.isArray(opts.formData[key])) {
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opts.formData[key].forEach(function (data) {
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add(key, data);
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});
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} else {
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add(key, opts.formData[key]);
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}
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});
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} catch (e) {
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cb(e);
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return;
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}
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formHeaders = form.getHeaders();
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Object.keys(formHeaders).forEach(function (header) {
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finalOpts.headers[header] = formHeaders[header];
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});
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}
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// TODO support unix sockets
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if ('https:' === finalOpts.protocol) {
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// https://nodejs.org/api/https.html#https_https_request_options_callback
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debug('\n[urequest] https.request(opts):');
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debug(finalOpts);
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requester = https;
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} else if ('http:' === finalOpts.protocol) {
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// https://nodejs.org/api/http.html#http_http_request_options_callback
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debug('\n[urequest] http.request(opts):');
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debug(finalOpts);
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requester = http;
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} else {
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cb(new Error("unknown protocol: '" + opts.uri.protocol + "'"));
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return;
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}
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if (form) {
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debug("\n[urequest] '" + finalOpts.method + "' (request) form");
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debug(formHeaders);
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// generally uploads don't use Chunked Encoding (some systems have issues with it)
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// and I don't want to do the work to calculate the content-lengths. This seems to work.
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req = form.submit(finalOpts, function (err, resp) {
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if (err) {
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cb(err);
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return;
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}
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onResponse(resp);
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resp.resume();
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});
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//req = requester.request(finalOpts, onResponse);
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//req.on('error', cb);
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//form.pipe(req);
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return;
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}
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if (opts.debug) {
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console.debug('');
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console.debug('[@root/request] Request Options:');
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console.debug(finalOpts);
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if (_body) {
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console.debug('[@root/request] Request Body:');
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console.debug(
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opts.body || opts.form || opts.formData || opts.json
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);
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}
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}
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req = requester.request(finalOpts, onResponse);
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req.once('error', cb);
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if (_body) {
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debug("\n[urequest] '" + finalOpts.method + "' (request) body");
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debug(_body);
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if ('function' === typeof _body.pipe) {
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// used for chunked encoding
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_body.pipe(req);
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_body.once('error', function (err) {
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// https://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
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// if the Readable stream emits an error during processing,
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// the Writable destination is not closed automatically
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_body.destroy();
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req.destroy(err);
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});
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} else {
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// used for known content-length
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req.end(_body);
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}
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} else {
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req.end();
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}
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}
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function parseUrl(str) {
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var obj = url.parse(str);
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var paths;
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if ('unix' !== (obj.hostname || obj.host || '').toLowerCase()) {
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return obj;
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}
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obj.href = null;
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obj.hostname = obj.host = null;
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paths = (obj.pathname || obj.path || '').split(':');
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obj.socketPath = paths.shift();
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obj.pathname = obj.path = paths.join(':');
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return obj;
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}
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function urequest(opts, cb) {
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debug('\n[urequest] received options:');
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debug(opts);
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var reqOpts = {};
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// request.js behavior:
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// encoding: null + json ? unknown
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// json => attempt to parse, fail silently
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// encoding => buffer.toString(encoding)
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// null === encoding => Buffer.concat(buffers)
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if ('string' === typeof opts) {
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opts = { url: opts };
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}
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_keys.forEach(function (key) {
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if (key in opts && 'undefined' !== typeof opts[key]) {
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reqOpts[key] = opts[key];
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} else if (key in defs) {
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|
reqOpts[key] = defs[key];
|
|
}
|
|
});
|
|
|
|
// TODO url.resolve(defs.baseUrl, opts.url);
|
|
if ('string' === typeof opts.url || 'string' === typeof opts.uri) {
|
|
if ('string' === typeof opts.url) {
|
|
reqOpts.url = opts.url;
|
|
reqOpts.uri = parseUrl(opts.url);
|
|
} else if ('string' === typeof opts.uri) {
|
|
reqOpts.url = opts.uri;
|
|
reqOpts.uri = parseUrl(opts.uri);
|
|
}
|
|
} else {
|
|
if ('object' === typeof opts.uri) {
|
|
reqOpts.url = url.format(opts.uri);
|
|
reqOpts.uri = opts.uri;
|
|
//reqOpts.uri = url.parse(reqOpts.uri);
|
|
} else if ('object' === typeof opts.url) {
|
|
reqOpts.url = url.format(opts.url);
|
|
reqOpts.uri = opts.url;
|
|
//reqOpts.uri = url.parse(reqOpts.url);
|
|
}
|
|
}
|
|
|
|
if (
|
|
opts.body ||
|
|
(opts.json && true !== opts.json) ||
|
|
opts.form ||
|
|
opts.formData
|
|
) {
|
|
// TODO this is probably a deviation from request's API
|
|
// need to check and probably eliminate it
|
|
reqOpts.method = (reqOpts.method || 'POST').toUpperCase();
|
|
} else {
|
|
reqOpts.method = (reqOpts.method || 'GET').toUpperCase();
|
|
}
|
|
if (!reqOpts.headers) {
|
|
reqOpts.headers = {};
|
|
}
|
|
|
|
// crazy case for easier testing
|
|
if (!hasHeader(reqOpts, 'CoNTeNT-TyPe')) {
|
|
if (
|
|
(true === reqOpts.json && reqOpts.body) ||
|
|
(true !== reqOpts.json && reqOpts.json)
|
|
) {
|
|
reqOpts.headers['Content-Type'] = 'application/json';
|
|
}
|
|
}
|
|
|
|
if (opts.debug) {
|
|
reqOpts.debug = opts.debug;
|
|
}
|
|
return urequestHelper(reqOpts, cb);
|
|
}
|
|
|
|
function smartPromisify(fn) {
|
|
return function (opts) {
|
|
var cb;
|
|
if ('function' === typeof arguments[1]) {
|
|
cb = Array.prototype.slice.call(arguments)[1];
|
|
return fn(opts, cb);
|
|
}
|
|
return new Promise(function (resolve, reject) {
|
|
fn(opts, function (err, resp) {
|
|
if (err) {
|
|
err._response = resp;
|
|
reject(err);
|
|
return;
|
|
}
|
|
resolve(resp);
|
|
});
|
|
});
|
|
};
|
|
}
|
|
|
|
var smartUrequest = smartPromisify(urequest);
|
|
|
|
smartUrequest.defaults = function (_defs) {
|
|
_defs = mergeOrDelete(defs, _defs);
|
|
return setDefaults(_defs);
|
|
};
|
|
['get', 'put', 'post', 'patch', 'delete', 'head', 'options'].forEach(
|
|
function (method) {
|
|
smartUrequest[method] = smartPromisify(function (obj, cb) {
|
|
if ('string' === typeof obj) {
|
|
obj = { url: obj };
|
|
}
|
|
obj.method = method.toUpperCase();
|
|
urequest(obj, cb);
|
|
});
|
|
}
|
|
);
|
|
smartUrequest.del = urequest.delete;
|
|
|
|
return smartUrequest;
|
|
}
|
|
|
|
var nodeUa =
|
|
'@root+request/' +
|
|
pkg.version +
|
|
' ' +
|
|
process.release.name +
|
|
'/' +
|
|
process.version +
|
|
' ' +
|
|
os.platform() +
|
|
'/' +
|
|
os.release() +
|
|
' ' +
|
|
os.type() +
|
|
'/' +
|
|
process.arch;
|
|
function getUserAgent(additional) {
|
|
// See https://tools.ietf.org/html/rfc8555#section-6.1
|
|
// And https://tools.ietf.org/html/rfc7231#section-5.5.3
|
|
// And https://community.letsencrypt.org/t/user-agent-flag-explained/3843/2
|
|
|
|
var ua = nodeUa;
|
|
if (additional) {
|
|
ua = additional + ' ' + ua;
|
|
}
|
|
|
|
return ua;
|
|
}
|
|
|
|
exports.request = setDefaults(_defaults);
|
|
exports._keys = _keys;
|
|
|
|
module.exports = exports.request;
|
|
module.exports._keys = _keys;
|
|
|
|
module.exports.debug =
|
|
-1 !== (process.env.NODE_DEBUG || '').split(/\s+/g).indexOf('urequest');
|
|
|
|
debug('DEBUG ON for urequest');
|