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xlink:href="#search-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button theme-toggle" aria-label="toggle-theme"><svg><use class="theme-svg-use" xlink:href="#light-theme-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button font-size" aria-label="change-font-size"><svg><use xlink:href="#font-size-icon"></use></svg></button></div></div><nav></nav></nav></div><div class="toc-container"><div class="toc-content"><span class="bold">On this page</span><div id="eed4d2a0bfd64539bb9df78095dec881"></div></div></div><div class="body-wrapper"><div class="main-content"><div class="main-wrapper"><section id="source-page" class="source-page"><header><h1 id="title" class="has-anchor">http_index.js</h1></header><article><pre class="prettyprint source lang-js"><code>// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The SFC licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
/**
* @fileoverview Defines an {@linkplain cmd.Executor command executor} that
* communicates with a remote end using HTTP + JSON.
*/
'use strict'
const http = require('node:http')
const https = require('node:https')
const url = require('node:url')
const httpLib = require('../lib/http')
/**
* @typedef {{protocol: (?string|undefined),
* auth: (?string|undefined),
* hostname: (?string|undefined),
* host: (?string|undefined),
* port: (?string|undefined),
* path: (?string|undefined),
* pathname: (?string|undefined)}}
*/
let RequestOptions // eslint-disable-line
/**
* @param {string} aUrl The request URL to parse.
* @return {RequestOptions} The request options.
* @throws {Error} if the URL does not include a hostname.
*/
function getRequestOptions(aUrl) {
// eslint-disable-next-line n/no-deprecated-api
let options = url.parse(aUrl)
if (!options.hostname) {
throw new Error('Invalid URL: ' + aUrl)
}
// Delete the search and has portions as they are not used.
options.search = null
options.hash = null
options.path = options.pathname
options.hostname = options.hostname === 'localhost' ? '127.0.0.1' : options.hostname // To support Node 17 and above. Refer https://github.com/nodejs/node/issues/40702 for details.
return options
}
/** @const {string} */
const USER_AGENT = (function () {
const version = require('../package.json').version
const platform = { darwin: 'mac', win32: 'windows' }[process.platform] || 'linux'
return `selenium/${version} (js ${platform})`
})()
/**
* A basic HTTP client used to send messages to a remote end.
*
* @implements {httpLib.Client}
*/
class HttpClient {
/**
* @param {string} serverUrl URL for the WebDriver server to send commands to.
* @param {http.Agent=} opt_agent The agent to use for each request.
* Defaults to `http.globalAgent`.
* @param {?string=} opt_proxy The proxy to use for the connection to the
* server. Default is to use no proxy.
* @param {?Object.&lt;string,Object>} client_options
*/
constructor(serverUrl, opt_agent, opt_proxy, client_options = {}) {
/** @private {http.Agent} */
this.agent_ = opt_agent || null
/**
* Base options for each request.
* @private {RequestOptions}
*/
this.options_ = getRequestOptions(serverUrl)
/**
* client options, header overrides
*/
this.client_options = client_options
/**
* sets keep-alive for the agent
* see https://stackoverflow.com/a/58332910
*/
this.keepAlive = this.client_options['keep-alive']
/** @private {?RequestOptions} */
this.proxyOptions_ = opt_proxy ? getRequestOptions(opt_proxy) : null
}
get keepAlive() {
return this.agent_.keepAlive
}
set keepAlive(value) {
if (value === 'true' || value === true) {
this.agent_.keepAlive = true
}
}
/** @override */
send(httpRequest) {
let data
let headers = {}
if (httpRequest.headers) {
httpRequest.headers.forEach(function (value, name) {
headers[name] = value
})
}
headers['User-Agent'] = this.client_options['user-agent'] || USER_AGENT
headers['Content-Length'] = 0
if (httpRequest.method == 'POST' || httpRequest.method == 'PUT') {
data = JSON.stringify(httpRequest.data)
headers['Content-Length'] = Buffer.byteLength(data, 'utf8')
headers['Content-Type'] = 'application/json;charset=UTF-8'
}
let path = this.options_.path
if (path.endsWith('/') &amp;&amp; httpRequest.path.startsWith('/')) {
path += httpRequest.path.substring(1)
} else {
path += httpRequest.path
}
// eslint-disable-next-line n/no-deprecated-api
let parsedPath = url.parse(path)
let options = {
agent: this.agent_ || null,
method: httpRequest.method,
auth: this.options_.auth,
hostname: this.options_.hostname,
port: this.options_.port,
protocol: this.options_.protocol,
path: parsedPath.path,
pathname: parsedPath.pathname,
search: parsedPath.search,
hash: parsedPath.hash,
headers,
}
return new Promise((fulfill, reject) => {
sendRequest(options, fulfill, reject, data, this.proxyOptions_)
})
}
}
/**
* Sends a single HTTP request.
* @param {!Object} options The request options.
* @param {function(!httpLib.Response)} onOk The function to call if the
* request succeeds.
* @param {function(!Error)} onError The function to call if the request fails.
* @param {?string=} opt_data The data to send with the request.
* @param {?RequestOptions=} opt_proxy The proxy server to use for the request.
* @param {number=} opt_retries The current number of retries.
*/
function sendRequest(options, onOk, onError, opt_data, opt_proxy, opt_retries) {
var hostname = options.hostname
var port = options.port
if (opt_proxy) {
let proxy = /** @type {RequestOptions} */ (opt_proxy)
// RFC 2616, section 5.1.2:
// The absoluteURI form is REQUIRED when the request is being made to a
// proxy.
let absoluteUri = url.format(options)
// RFC 2616, section 14.23:
// An HTTP/1.1 proxy MUST ensure that any request message it forwards does
// contain an appropriate Host header field that identifies the service
// being requested by the proxy.
let targetHost = options.hostname
if (options.port) {
targetHost += ':' + options.port
}
// Update the request options with our proxy info.
options.headers['Host'] = targetHost
options.path = absoluteUri
options.host = proxy.host
options.hostname = proxy.hostname
options.port = proxy.port
// Update the protocol to avoid EPROTO errors when the webdriver proxy
// uses a different protocol from the remote selenium server.
options.protocol = opt_proxy.protocol
if (proxy.auth) {
options.headers['Proxy-Authorization'] = 'Basic ' + Buffer.from(proxy.auth).toString('base64')
}
}
let requestFn = options.protocol === 'https:' ? https.request : http.request
var request = requestFn(options, function onResponse(response) {
if (response.statusCode == 302 || response.statusCode == 303) {
let location
try {
// eslint-disable-next-line n/no-deprecated-api
location = url.parse(response.headers['location'])
} catch (ex) {
onError(
Error(
'Failed to parse "Location" header for server redirect: ' +
ex.message +
'\nResponse was: \n' +
new httpLib.Response(response.statusCode, response.headers, ''),
),
)
return
}
if (!location.hostname) {
location.hostname = hostname
location.port = port
location.auth = options.auth
}
request.destroy()
sendRequest(
{
method: 'GET',
protocol: location.protocol || options.protocol,
hostname: location.hostname,
port: location.port,
path: location.path,
auth: location.auth,
pathname: location.pathname,
search: location.search,
hash: location.hash,
headers: {
Accept: 'application/json; charset=utf-8',
'User-Agent': options.headers['User-Agent'] || USER_AGENT,
},
},
onOk,
onError,
undefined,
opt_proxy,
)
return
}
const body = []
response.on('data', body.push.bind(body))
response.on('end', function () {
const resp = new httpLib.Response(
/** @type {number} */ (response.statusCode),
/** @type {!Object&lt;string>} */ (response.headers),
Buffer.concat(body).toString('utf8').replace(/\0/g, ''),
)
onOk(resp)
})
})
request.on('error', function (e) {
if (typeof opt_retries === 'undefined') {
opt_retries = 0
}
if (shouldRetryRequest(opt_retries, e)) {
opt_retries += 1
setTimeout(function () {
sendRequest(options, onOk, onError, opt_data, opt_proxy, opt_retries)
}, 15)
} else {
let message = e.message
if (e.code) {
message = e.code + ' ' + message
}
onError(new Error(message))
}
})
if (opt_data) {
request.write(opt_data)
}
request.end()
}
const MAX_RETRIES = 3
/**
* A retry is sometimes needed on Windows where we may quickly run out of
* ephemeral ports. A more robust solution is bumping the MaxUserPort setting
* as described here: http://msdn.microsoft.com/en-us/library/aa560610%28v=bts.20%29.aspx
*
* @param {!number} retries
* @param {!Error} err
* @return {boolean}
*/
function shouldRetryRequest(retries, err) {
return retries &lt; MAX_RETRIES &amp;&amp; isRetryableNetworkError(err)
}
/**
* @param {!Error} err
* @return {boolean}
*/
function isRetryableNetworkError(err) {
if (err &amp;&amp; err.code) {
return (
err.code === 'ECONNABORTED' ||
err.code === 'ECONNRESET' ||
err.code === 'ECONNREFUSED' ||
err.code === 'EADDRINUSE' ||
err.code === 'EPIPE' ||
err.code === 'ETIMEDOUT'
)
}
return false
}
// PUBLIC API
module.exports.Agent = http.Agent
module.exports.Executor = httpLib.Executor
module.exports.HttpClient = HttpClient
module.exports.Request = httpLib.Request
module.exports.Response = httpLib.Response
</code></pre></article></section></div></div></div><div class="search-container" id="PkfLWpAbet" style="display:none"><div class="wrapper" id="iCxFxjkHbP"><button class="icon-button search-close-button" id="VjLlGakifb" aria-label="close search"><svg><use xlink:href="#close-icon"></use></svg></button><div class="search-box-c"><svg><use xlink:href="#search-icon"></use></svg> <input type="text" id="vpcKVYIppa" class="search-input" placeholder="Search..." autofocus></div><div class="search-result-c" id="fWwVHRuDuN"><span class="search-result-c-text">Type anything to view search result</span></div></div></div><div class="mobile-menu-icon-container"><button class="icon-button" id="mobile-menu" data-isopen="false" aria-label="menu"><svg><use xlink:href="#menu-icon"></use></svg></button></div><div id="mobile-sidebar" class="mobile-sidebar-container"><div class="mobile-sidebar-wrapper"><a href="/" class="sidebar-title sidebar-title-anchor">Selenium WebDriver JavaScript API</a><div 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href="global.html#pac">pac</a></div><div class="sidebar-section-children"><a href="global.html#pad">pad</a></div><div class="sidebar-section-children"><a href="global.html#parseHttpResponse">parseHttpResponse</a></div><div class="sidebar-section-children"><a href="global.html#path">path</a></div><div class="sidebar-section-children"><a href="global.html#projectRoot">projectRoot</a></div><div class="sidebar-section-children"><a href="global.html#read">read</a></div><div class="sidebar-section-children"><a href="global.html#removeConsoleHandler">removeConsoleHandler</a></div><div class="sidebar-section-children"><a href="global.html#requireAtom">requireAtom</a></div><div class="sidebar-section-children"><a href="global.html#resolveCommandLineFlags">resolveCommandLineFlags</a></div><div class="sidebar-section-children"><a href="global.html#resolveWaitMessage">resolveWaitMessage</a></div><div class="sidebar-section-children"><a href="global.html#rmDir">rmDir</a></div><div 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