#!/usr/bin/env php
<?php
/**
* download_jsdos.php
*
* Downloads the js-dos 6.22 library files from the official CDN and places them
* under public_html/js/jsdos/. The wdosbox.js file is patched to set
* Module.locateFile so that its companion WASM file is resolved from /js/jsdos/
* rather than relative to the page URL (which breaks when js-dos creates a Blob
* worker from the downloaded content).
*
* Usage: php scripts/download_jsdos.php
*/
$baseDir = __DIR__ . '/../public_html/js/jsdos';
if (!is_dir($baseDir) && !mkdir($baseDir, 0755, true)) {
fwrite(STDERR, "ERROR: Could not create directory: $baseDir\n");
exit(1);
}
$cdnBase = 'https://js-dos.com/6.22/current';
$files = [
'js-dos.js',
'wdosbox.js',
'wdosbox.wasm.js',
];
foreach ($files as $file) {
$url = "$cdnBase/$file";
$destPath = "$baseDir/$file";
echo "Downloading $url ...\n";
$content = @file_get_contents($url, false, stream_context_create([
'http' => ['timeout' => 60],
'ssl' => ['verify_peer' => true],
]));
if ($content === false) {
fwrite(STDERR, "ERROR: Failed to download $url\n");
fwrite(STDERR, "Check your internet connection and that the URL is reachable.\n");
exit(1);
}
// Patch wdosbox.js: prepend a Module.locateFile override so that the
// Emscripten runtime resolves its WASM companion from /js/jsdos/ regardless
// of the Blob worker context in which it executes.
if ($file === 'wdosbox.js') {
$patch = "/* js-dos path patch */\n";
$patch .= "if (typeof Module === 'undefined') { Module = {}; }\n";
$patch .= "Module['locateFile'] = function(path) { return '/js/jsdos/' + path; };\n";
$patch .= "/* end patch */\n\n";
$content = $patch . $content;
echo " -> Patched with Module.locateFile override.\n";
}
if (file_put_contents($destPath, $content) === false) {
fwrite(STDERR, "ERROR: Could not write $destPath\n");
exit(1);
}
echo " -> Saved to $destPath (" . number_format(strlen($content)) . " bytes)\n";
}
echo "\nDone. Files installed to public_html/js/jsdos/.\n";
echo "You can now visit /games/jsdos/<game-id> to play a JS-DOS door.\n";
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