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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
* Copyright (C) 2011 Google Inc. All rights reserved.
* Copyright (C) 2022 Mozilla Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Utility to generate commands to invoke a request for powershell
"use strict";
// Some of these headers are passed in as seperate `Invoke-WebRequest` parameters so ignore
// when building the headers list, others are not to neccesarily restrict the request.
const IGNORED_HEADERS = [
"connection",
"proxy-connection",
"content-length",
"expect",
"range",
"host",
"content-type",
"user-agent",
"cookie",
];
/**
* This escapes strings for the powershell command
*
* 1. Escape the backtick, dollar sign and the double quotes See https://www.rlmueller.net/PowerShellEscape.htm
* 2. Convert any non printing ASCII characters found, using the ASCII code.
*/
function escapeStr(str) {
return `"${str
.replace(/[`\$"]/g, "`$&")
.replace(/[^\x20-\x7E]/g, char => "$([char]" + char.charCodeAt(0) + ")")}"`;
}
const PowerShell = {
generateCommand(url, method, headers, postData, cookies) {
const parameters = [];
// Create a WebSession to pass the information about cookies
// See https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/invoke-webrequest?view=powershell-7.2#-websession
const session = [];
for (const { name, value, domain } of cookies) {
if (!session.length) {
session.push(
"$session = New-Object Microsoft.PowerShell.Commands.WebRequestSession"
);
}
session.push(
`$session.Cookies.Add((New-Object System.Net.Cookie(${escapeStr(
name
)}, ${escapeStr(value)}, "/", ${escapeStr(
domain || new URL(url).host
)})))`
);
}
parameters.push(`-Uri ${escapeStr(url)}`);
if (method !== "GET") {
parameters.push(`-Method ${method}`);
}
if (session.length) {
parameters.push("-WebSession $session");
}
const userAgent = headers.find(
({ name }) => name.toLowerCase() === "user-agent"
);
if (userAgent) {
parameters.push("-UserAgent " + escapeStr(userAgent.value));
}
const headersStr = [];
for (let { name, value } of headers) {
// Translate any HTTP2 pseudo headers to HTTP headers
name = name.replace(/^:/, "");
if (IGNORED_HEADERS.includes(name.toLowerCase())) {
continue;
}
headersStr.push(`${escapeStr(name)} = ${escapeStr(value)}`);
}
if (headersStr.length) {
parameters.push(`-Headers @{\n${headersStr.join("\n ")}\n}`);
}
const contentType = headers.find(
header => header.name.toLowerCase() === "content-type"
);
if (contentType) {
parameters.push("-ContentType " + escapeStr(contentType.value));
}
const formData = postData.text;
if (formData) {
// Encode bytes if any of the characters is not an ASCII printing character (not between Space character and ~ character)
// a-zA-Z0-9 etc. See http://www.asciitable.com/
const body = /[^\x20-\x7E]/.test(formData)
? "([System.Text.Encoding]::UTF8.GetBytes(" + escapeStr(formData) + "))"
: escapeStr(formData);
parameters.push("-Body " + body);
}
return `${
session.length ? session.join("\n").concat("\n") : ""
// -UseBasicParsing is added for backward compatibility.
// See https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/invoke-webrequest?view=powershell-7.2#-usebasicparsing
}Invoke-WebRequest -UseBasicParsing ${parameters.join(" `\n")}`;
},
};
exports.PowerShell = PowerShell;
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