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node.js
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node.js
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(function (process) {
process.global.process = process;
process.global.global = process.global;
global.GLOBAL = global;
global.root = global;
/** deprecation errors ************************************************/
function removed (reason) {
return function () {
throw new Error(reason)
}
}
process.debug = removed("process.debug() has moved. Use require('sys') to bring it back.");
process.error = removed("process.error() has moved. Use require('sys') to bring it back.");
process.watchFile = removed("process.watchFile() has moved to fs.watchFile()");
process.unwatchFile = removed("process.unwatchFile() has moved to fs.unwatchFile()");
process.mixin = removed('process.mixin() has been removed.');
process.createChildProcess = removed("childProcess API has changed. See doc/api.txt.");
process.inherits = removed("process.inherits() has moved to sys.inherits.");
process.assert = function (x, msg) {
if (!x) throw new Error(msg || "assertion error");
};
var writeError = process.binding('stdio').writeError;
var evalcxMsg;
process.evalcx = function () {
if (!evalcxMsg) {
writeError(evalcxMsg =
"process.evalcx is deprecated. Use Script.runInNewContext instead.\n");
}
return process.binding('evals').Script
.runInNewContext.apply(null, arguments);
};
// nextTick()
var nextTickQueue = [];
process._tickCallback = function () {
var l = nextTickQueue.length;
if (l === 0) return;
try {
for (var i = 0; i < l; i++) {
nextTickQueue[i]();
}
}
catch(e) {
nextTickQueue.splice(0, i+1);
if (i+1 < l) {
process._needTickCallback();
}
throw e;
}
nextTickQueue.splice(0, l);
};
process.nextTick = function (callback) {
nextTickQueue.push(callback);
process._needTickCallback();
};
// Native module system
var internalModuleCache = {},
// This contains the source code for the files in lib/
// Like, natives.fs is the contents of lib/fs.js
nativeSource = process.binding('natives');
function requireNative (id) {
if (internalModuleCache[id]) return internalModuleCache[id].exports;
if (!nativeSource[id]) throw new Error('No such native module ' + id);
var m = { id: id, exports: {} };
internalModuleCache[id] = m;
// Compile the native module. Create wrapper function
var wrapper = "(function (exports, require, module) { "
+ nativeSource[id]
+ "\n});";
var compiledWrapper = process.compile(wrapper, id);
compiledWrapper.apply(m.exports, [m.exports, requireNative, m]);
m.loaded = true;
return m.exports;
}
// Load events module in order to access prototype elements on process like
// process.addListener.
var events = requireNative('events');
// Signal Handlers
(function() {
var signalWatchers = {};
var addListener = process.addListener;
var removeListener = process.removeListener;
function isSignal (event) {
return event.slice(0, 3) === 'SIG' && process.hasOwnProperty(event);
};
// Wrap addListener for the special signal types
process.on = process.addListener = function (type, listener) {
var ret = addListener.apply(this, arguments);
if (isSignal(type)) {
if (!signalWatchers.hasOwnProperty(type)) {
var b = process.binding('signal_watcher'),
w = new b.SignalWatcher(process[type]);
w.callback = function () {
process.emit(type);
}
signalWatchers[type] = w;
w.start();
} else if (this.listeners(type).length === 1) {
signalWatchers[event].start();
}
}
return ret;
}
process.removeListener = function (type, listener) {
var ret = removeListener.apply(this, arguments);
if (isSignal(type)) {
process.assert(signalWatchers.hasOwnProperty(type));
if (this.listeners(type).length === 0) {
signalWatchers[type].stop();
}
}
return ret;
}
})();
// Timers
function addTimerListener (callback) {
var timer = this;
// Special case the no param case to avoid the extra object creation.
if (arguments.length > 2) {
var args = Array.prototype.slice.call(arguments, 2);
timer.callback = function () { callback.apply(timer, args); };
} else {
timer.callback = callback;
}
}
global.setTimeout = function (callback, after) {
var timer = new process.Timer();
addTimerListener.apply(timer, arguments);
timer.start(after, 0);
return timer;
};
global.setInterval = function (callback, repeat) {
var timer = new process.Timer();
addTimerListener.apply(timer, arguments);
timer.start(repeat, repeat ? repeat : 1);
return timer;
};
global.clearTimeout = function (timer) {
if (timer instanceof process.Timer) {
timer.stop();
}
};
global.clearInterval = global.clearTimeout;
var stdout;
process.__defineGetter__('stdout', function () {
if (stdout) return stdout;
var binding = process.binding('stdio'),
net = requireNative('net'),
fs = requireNative('fs'),
fd = binding.stdoutFD;
if (binding.isStdoutBlocking()) {
stdout = new fs.WriteStream(null, {fd: fd});
} else {
stdout = new net.Stream(fd);
// FIXME Should probably have an option in net.Stream to create a stream from
// an existing fd which is writable only. But for now we'll just add
// this hack and set the `readable` member to false.
// Test: ./node test/fixtures/echo.js < /etc/passwd
stdout.readable = false;
}
return stdout;
});
var stdin;
process.openStdin = function () {
if (stdin) return stdin;
var binding = process.binding('stdio'),
net = requireNative('net'),
fs = requireNative('fs'),
fd = binding.openStdin();
if (binding.isStdinBlocking()) {
stdin = new fs.ReadStream(null, {fd: fd});
} else {
stdin = new net.Stream(fd);
stdin.readable = true;
}
stdin.resume();
return stdin;
};
// console object
var formatRegExp = /%[sdj]/g;
function format (f) {
if (typeof f !== 'string') {
var objects = [], sys = requireNative('sys');
for (var i = 0; i < arguments.length; i++) {
objects.push(sys.inspect(arguments[i]));
}
return objects.join(' ');
}
var i = 1;
var args = arguments;
var str = String(f).replace(formatRegExp, function (x) {
switch (x) {
case '%s': return args[i++];
case '%d': return +args[i++];
case '%j': return JSON.stringify(args[i++]);
default:
return x;
}
});
for (var len = args.length; i < len; ++i) {
str += ' ' + args[i];
}
return str;
}
global.console = {};
global.console.log = function () {
process.stdout.write(format.apply(this, arguments) + '\n');
};
global.console.info = global.console.log;
global.console.warn = function () {
writeError(format.apply(this, arguments) + '\n');
};
global.console.error = global.console.warn;
global.console.dir = function(object){
var sys = requireNative('sys');
process.stdout.write(sys.inspect(object) + '\n');
};
var times = {};
global.console.time = function(label){
times[label] = Date.now();
};
global.console.timeEnd = function(label){
var duration = Date.now() - times[label];
global.console.log('%s: %dms', label, duration);
};
global.console.trace = function(label){
// TODO probably can to do this better with V8's debug object once that is
// exposed.
var err = new Error;
err.name = 'Trace';
err.message = label || '';
Error.captureStackTrace(err, arguments.callee);
console.error(err.stack);
};
global.console.assert = function(expression){
if(!expression){
var arr = Array.prototype.slice.call(arguments, 1);
process.assert(false, format.apply(this, arr));
}
}
global.Buffer = requireNative('buffer').Buffer;
process.exit = function (code) {
process.emit("exit");
process.reallyExit(code);
};
// Module System
var module = (function () {
var exports = {};
// Set the environ variable NODE_MODULE_CONTEXTS=1 to make node load all
// modules in thier own context.
var contextLoad = false;
if (parseInt(process.env["NODE_MODULE_CONTEXTS"]) > 0) contextLoad = true;
var Script;
var extensionCache = {};
function Module (id, parent) {
this.id = id;
this.exports = {};
this.parent = parent;
if (parent) {
this.moduleCache = parent.moduleCache;
} else {
this.moduleCache = {};
}
this.filename = null;
this.loaded = false;
this.exited = false;
this.children = [];
};
// Modules
var debugLevel = parseInt(process.env["NODE_DEBUG"], 16);
function debug (x) {
if (debugLevel & 1) {
process.binding('stdio').writeError(x + "\n");
}
}
var path = requireNative("path");
var modulePaths = [path.join(process.execPath, "..", "..", "lib", "node")];
if (process.env["HOME"]) {
modulePaths.unshift(path.join(process.env["HOME"], ".node_libraries"));
}
if (process.env["NODE_PATH"]) {
modulePaths = process.env["NODE_PATH"].split(":").concat(modulePaths);
}
var moduleNativeExtensions = ['js', 'node'];
// Which files to traverse while finding id? Returns generator function.
function traverser (id, dirs) {
var head = [], inDir = [], _dirs = dirs.slice();
return function next () {
var result = head.shift();
if (result) { return result; }
var gen = inDir.shift();
if (gen) { head = gen(); return next(); }
var dir = _dirs.shift();
if (dir !== undefined) {
function direct (ext) { return path.join(dir, id + '.' + ext); }
function index (ext) { return path.join(dir, id, 'index.' + ext); }
var userExts = Object.keys(extensionCache);
inDir = [
function () { return moduleNativeExtensions.map(direct); },
function () { return userExts.map(direct); },
function () { return moduleNativeExtensions.map(index); },
function () { return userExts.map(index); }
];
head = [path.join(dir, id)];
return next();
}
};
}
/* Sync unless callback given */
function findModulePath (id, dirs, callback) {
process.assert(Array.isArray(dirs));
if (/^https?:\/\//.exec(id)) {
if (callback) {
callback(id);
} else {
throw new Error("Sync http require not allowed.");
}
return;
}
var nextLoc = traverser(id, id.charAt(0) === '/' ? [''] : dirs);
var fs = requireNative('fs');
function searchLocations () {
var location, stats;
while (location = nextLoc()) {
try { stats = fs.statSync(location); } catch(e) { continue; }
if (stats && !stats.isDirectory()) return location;
}
return false;
}
function searchLocationsAsync (cb) {
var location = nextLoc();
if (!location) { cb(false); return; }
fs.stat(location, function (err, stats) {
if (stats && !stats.isDirectory()) { cb(location); }
else { searchLocationsAsync(cb); }
});
}
return callback ? searchLocationsAsync(callback) : searchLocations();
}
// sync - no i/o performed
function resolveModulePath(request, parent) {
var start = request.substring(0, 2);
if (start !== "./" && start !== "..") { return [request, modulePaths]; }
// Relative request
var exts = moduleNativeExtensions.concat(Object.keys(extensionCache)),
indexRE = new RegExp('^index\\.(' + exts.join('|') + ')$'),
// XXX dangerous code: ^^^ what if exts contained some RE control chars?
isIndex = path.basename(parent.filename).match(indexRE),
parentIdPath = isIndex ? parent.id : path.dirname(parent.id),
id = path.join(parentIdPath, request);
// make sure require('./path') and require('path') get distinct ids, even
// when called from the toplevel js file
if (parentIdPath === '.' && id.indexOf('/') === -1) {
id = './' + id;
}
debug("RELATIVE: requested:" + request + " set ID to: "+id+" from "+parent.id);
return [id, [path.dirname(parent.filename)]];
}
function loadModule (request, parent, callback) {
var resolvedModule = resolveModulePath(request, parent),
id = resolvedModule[0],
paths = resolvedModule[1];
debug("loadModule REQUEST " + (request) + " parent: " + parent.id);
// native modules always take precedence.
if (nativeSource[id]) {
//debug('load native module ' + id);
var nativeMod = requireNative(id);
return callback ? callback(null, nativeMod) : nativeMod;
}
// look up the filename first, since that's the cache key.
debug("looking for " + JSON.stringify(id) + " in " + JSON.stringify(paths));
if (!callback) {
// sync
var filename = findModulePath(request, paths);
if (!filename) {
throw new Error("Cannot find module '" + request + "'");
}
var cachedModule = parent.moduleCache[filename];
if (cachedModule) return cachedModule.exports;
var module = new Module(id, parent);
module.moduleCache[filename] = module;
module.loadSync(filename);
return module.exports;
}
// async
findModulePath(request, paths, function (filename) {
if (!filename) {
var err = new Error("Cannot find module '" + request + "'");
return callback(err);
}
var cachedModule = parent.moduleCache[filename];
if (cachedModule) return callback(null, cachedModule.exports);
var module = new Module(id, parent);
module.moduleCache[filename] = module;
module.load(filename, callback);
});
};
// This function allows the user to register file extensions to custom
// Javascript 'compilers'. It accepts 2 arguments, where ext is a file
// extension as a string. E.g. '.coffee' for coffee-script files. compiler
// is the second argument, which is a function that gets called when the
// specified file extension is found. The compiler is passed a single
// argument, which is, the file contents, which need to be compiled.
//
// The function needs to return the compiled source, or an non-string
// variable that will get attached directly to the module exports. Example:
//
// require.registerExtension('.coffee', function(content) {
// return doCompileMagic(content);
// });
function registerExtension(ext, compiler) {
if ('string' !== typeof ext && false === /\.\w+$/.test(ext)) {
throw new Error('require.registerExtension: First argument not a valid extension string.');
}
if ('function' !== typeof compiler) {
throw new Error('require.registerExtension: Second argument not a valid compiler function.');
}
extensionCache[ext.slice(1)] = compiler;
}
Module.prototype.loadSync = function (filename) {
debug("loadSync " + JSON.stringify(filename) + " for module " + JSON.stringify(this.id));
process.assert(!this.loaded);
this.filename = filename;
if (filename.match(/\.node$/)) {
this._loadObjectSync(filename);
} else {
this._loadScriptSync(filename);
}
};
Module.prototype.load = function (filename, callback) {
debug("load " + JSON.stringify(filename) + " for module " + JSON.stringify(this.id));
process.assert(!this.loaded);
this.filename = filename;
if (filename.match(/\.node$/)) {
this._loadObject(filename, callback);
} else {
this._loadScript(filename, callback);
}
};
Module.prototype._loadObjectSync = function (filename) {
this.loaded = true;
process.dlopen(filename, this.exports);
};
Module.prototype._loadObject = function (filename, callback) {
var self = this;
// XXX Not yet supporting loading from HTTP. would need to download the
// file, store it to tmp then run dlopen on it.
self.loaded = true;
process.dlopen(filename, self.exports); // FIXME synchronus
if (callback) callback(null, self.exports);
};
function cat (id, callback) {
if (id.match(/^http:\/\//)) {
loadModule('http', process.mainModule, function (err, http) {
if (err) {
if (callback) callback(err);
} else {
http.cat(id, callback);
}
});
} else {
requireNative('fs').readFile(id, 'utf8', callback);
}
}
// Returns exception if any
Module.prototype._compile = function (content, filename) {
var self = this;
// remove shebang
content = content.replace(/^\#\!.*/, '');
// Compile content if needed
var ext = path.extname(filename).slice(1);
if (extensionCache[ext]) {
content = extensionCache[ext](content);
}
if ("string" !== typeof content) {
self.exports = content;
return;
}
function requireAsync (url, cb) {
loadModule(url, self, cb);
}
function require (path) {
return loadModule(path, self);
}
require.paths = modulePaths;
require.async = requireAsync;
require.main = process.mainModule;
require.registerExtension = registerExtension;
var dirname = path.dirname(filename);
if (contextLoad) {
if (!Script) Script = process.binding('evals').Script;
if (self.id !== ".") {
debug('load submodule');
// not root module
var sandbox = {};
for (var k in global) {
sandbox[k] = global[k];
}
sandbox.require = require;
sandbox.exports = self.exports;
sandbox.__filename = filename;
sandbox.__dirname = dirname;
sandbox.module = self;
sandbox.global = sandbox;
sandbox.root = root;
Script.runInNewContext(content, sandbox, filename);
} else {
debug('load root module');
// root module
global.require = require;
global.exports = self.exports;
global.__filename = filename;
global.__dirname = dirname;
global.module = self;
Script.runInThisContext(content, filename);
}
} else {
// create wrapper function
var wrapper = "(function (exports, require, module, __filename, __dirname) { "
+ content
+ "\n});";
var compiledWrapper = process.compile(wrapper, filename);
if (filename === process.argv[1] && global.v8debug) {
global.v8debug.Debug.setBreakPoint(compiledWrapper, 0, 0);
}
compiledWrapper.apply(self.exports, [self.exports, require, self, filename, dirname]);
}
};
Module.prototype._loadScriptSync = function (filename) {
var content = requireNative('fs').readFileSync(filename, 'utf8');
this._compile(content, filename);
this.loaded = true;
};
Module.prototype._loadScript = function (filename, callback) {
var self = this;
cat(filename, function (err, content) {
debug('cat done');
if (err) {
if (callback) callback(err);
} else {
try {
self._compile(content, filename);
} catch (err) {
if (callback) callback(err);
return;
}
self._waitChildrenLoad(function () {
self.loaded = true;
if (self.onload) self.onload();
if (callback) callback(null, self.exports);
});
}
});
};
Module.prototype._waitChildrenLoad = function (callback) {
var nloaded = 0;
var children = this.children;
for (var i = 0; i < children.length; i++) {
var child = children[i];
if (child.loaded) {
nloaded++;
} else {
child.onload = function () {
child.onload = null;
nloaded++;
if (children.length == nloaded && callback) callback();
};
}
}
if (children.length == nloaded && callback) callback();
};
// bootstrap main module.
exports.runMain = function () {
// Load the main module--the command line argument.
process.mainModule = new Module(".");
process.mainModule.loadSync(process.argv[1]);
}
return exports;
})();
var cwd = process.cwd();
var path = requireNative('path');
// Make process.argv[0] and process.argv[1] into full paths.
if (process.argv[0].indexOf('/') > 0) {
process.argv[0] = path.join(cwd, process.argv[0]);
}
if (process.argv[1]) {
if (process.argv[1].charAt(0) != "/" && !(/^http:\/\//).exec(process.argv[1])) {
process.argv[1] = path.join(cwd, process.argv[1]);
}
// REMOVEME: nextTick should not be necessary. This hack to get
// test/simple/test-exception-handler2.js working.
process.nextTick(function() {
module.runMain();
});
} else {
// No arguments, run the repl
var repl = requireNative('repl');
console.log("Type '.help' for options.");
repl.start();
}
// All our arguments are loaded. We've evaluated all of the scripts. We
// might even have created TCP servers. Now we enter the main eventloop. If
// there are no watchers on the loop (except for the ones that were
// ev_unref'd) then this function exits. As long as there are active
// watchers, it blocks.
process.loop();
process.emit("exit");
});