firefox-main/browser/app/desktop-launcher/main.cpp (file symbol)

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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/. */
#include <iostream>
#include <optional>
#include <rpc.h>
#include <shellapi.h>
#include <string>
#include <windows.h>
#include "download_firefox.h"
#include "file_sink.h"
#include "find_firefox.h"
#include "tempfile_name.h"
#define DOWNLOAD_PAGE L"https://www.mozilla.org/firefox/new/"
#define STUB_INSTALLER_ARGS L"/Prompt /LaunchedBy:desktoplauncher"
/**
* Runs the provided path using the shell using the provided command-line
* parameters.
*
* Blocks until the application starts accepting input, or until a
* Windows-internal timeout is reached. Refer to SEE_MASK_WAITFORINPUTIDLE's
* documentation.
*
* @param path The path to the file or URL to run.
* @param params Command-line arguments to pass. May be null.
* @returns Truthy if the launch succeeded, false otherwise.
*/
static bool ExecuteAndWaitForIdle(const std::wstring& path,
const wchar_t* params) {
SHELLEXECUTEINFOW sei = {0};
sei.cbSize = sizeof(sei);
sei.fMask = SEE_MASK_WAITFORINPUTIDLE | SEE_MASK_NOASYNC;
sei.lpFile = path.c_str();
sei.lpParameters = params;
sei.nShow = SW_SHOWNORMAL;
ShellExecuteExW(&sei);
return (uintptr_t)sei.hInstApp > 32;
}
int wmain() {
// For telemetry purposes, let's set the env variable to indicate that
// we used the launcher to start Firefox
if (!SetEnvironmentVariableW(L"FIREFOX_LAUNCHED_BY_DESKTOP_LAUNCHER",
L"TRUE")) {
std::wcout
<< L"Could not set env variable FIREFOX_LAUNCHED_BY_DESKTOP_LAUNCHER"
<< std::endl;
}
// First, we try to launch Firefox if it is installed
std::optional<std::wstring> firefox_path = lookupFirefoxPath();
if (firefox_path.has_value()) {
std::wcout << L"Found Firefox at path " << firefox_path.value()
<< std::endl;
if (ExecuteAndWaitForIdle(firefox_path.value(), nullptr)) {
std::wcout << L"Firefox launched" << std::endl;
return 0;
}
}
bool download_completed = false;
// If that doesn't work, we try to download the installer.
std::optional<std::wstring> tempfileName = get_tempfile_name();
// If we do create a fileSink, it needs to live until the
// ExecuteAndWaitForIdle calls return to ensure that other processes cannot
// delete or rename it.
std::unique_ptr<FileSink> fileSink;
if (tempfileName.has_value()) {
fileSink = std::make_unique<FileSink>();
if (fileSink->open(tempfileName.value())) {
ErrCode rc = download_firefox(fileSink.get());
if (rc == ErrCode::OK) {
std::wcout << L"Firefox installer successfully downloaded" << std::endl;
download_completed = true;
}
}
}
// If the installer successfully downloaded, try to launch it
if (download_completed) {
if (fileSink->freeze() &&
ExecuteAndWaitForIdle(tempfileName.value(), STUB_INSTALLER_ARGS)) {
std::wcout << L"Firefox installer launched" << std::endl;
return 0;
}
}
// If that doesn't work, open the download page in the default browser
if (ExecuteAndWaitForIdle(DOWNLOAD_PAGE, nullptr)) {
std::wcout << L"Opened default browser to the download page" << std::endl;
}
return 0;
}