node/src/node.js at http_agent · Andypro1/node · GitHub

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(function(process) {

global = this;

global.process = process;

global.global = global;

global.GLOBAL = global;

global.root = global;

/** deprecation errors ************************************************/

function removed(reason) {

return function() {

throw new Error(reason);

};

}

process.debug =

removed('process.debug() use console.error() instead');

process.error =

removed('process.error() use console.error() instead');

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._byteLength =

removed('process._byteLength() has moved to Buffer.byteLength');

process.assert = function(x, msg) {

if (!x) throw new Error(msg || 'assertion error');

};

var Script = process.binding('evals').Script;

var runInThisContext = Script.runInThisContext;

var runInNewContext = Script.runInNewContext;

// lazy loaded.

var constants;

function lazyConstants() {

if (!constants) constants = process.binding('constants');

return constants;

}

// 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; // process.nextTick error, or 'error' event on first tick

}

nextTickQueue.splice(0, l);

};

process.nextTick = function(callback) {

nextTickQueue.push(callback);

process._needTickCallback();

};

// Native modules don't need a full require function. So we can bootstrap

// most of the system with this mini module system.

var NativeModule = (function() {

function NativeModule(id) {

this.filename = id + '.js';

this.id = id;

this.exports = {};

this.loaded = false;

}

NativeModule._source = process.binding('natives');

NativeModule._cache = {};

NativeModule.require = function(id) {

if (id == 'module') {

return Module;

}

var cached = NativeModule.getCached(id);

if (cached) {

return cached.exports;

}

if (!NativeModule.exists(id)) {

throw new Error('No such native module ' + id);

}

var nativeModule = new NativeModule(id);

nativeModule.compile();

nativeModule.cache();

return nativeModule.exports;

};

NativeModule.getCached = function(id) {

return NativeModule._cache[id];

}

NativeModule.exists = function(id) {

return (id in NativeModule._source);

}

NativeModule.getSource = function(id) {

return NativeModule._source[id];

}

NativeModule.wrap = function(script) {

return NativeModule.wrapper[0] + script + NativeModule.wrapper[1];

};

NativeModule.wrapper = [

'(function (exports, require, module, __filename, __dirname) { ',

'\n});'

];

NativeModule.prototype.compile = function() {

var source = NativeModule.getSource(this.id);

source = NativeModule.wrap(source);

var fn = runInThisContext(source, this.filename, true);

fn(this.exports, NativeModule.require, this, this.filename);

this.loaded = true;

};

NativeModule.prototype.cache = function() {

NativeModule._cache[this.id] = this;

};

return NativeModule;

})();

// Module System

var Module = (function() {

function Module(id, parent) {

this.id = id;

this.exports = {};

this.parent = parent;

this.filename = null;

this.loaded = false;

this.exited = false;

this.children = [];

};

// Set the environ variable NODE_MODULE_CONTEXTS=1 to make node load all

// modules in thier own context.

Module._contextLoad = (+process.env['NODE_MODULE_CONTEXTS'] > 0);

Module._cache = {};

Module._pathCache = {};

Module._extensions = {};

Module._paths = [];

Module.wrapper = NativeModule.wrapper;

Module.wrap = NativeModule.wrap;

var path = NativeModule.require('path');

Module._debug = function() {};

if (process.env.NODE_DEBUG && /module/.test(process.env.NODE_DEBUG)) {

Module._debug = function(x) {

console.error(x);

};

}

// We use this alias for the preprocessor that filters it out

var debug = Module._debug;

// given a module name, and a list of paths to test, returns the first

// matching file in the following precedence.

// require("a.<ext>")

// -> a.<ext>

// require("a")

// -> a

// -> a.<ext>

// -> a/index.<ext>

Module._findPath = function(request, paths) {

var fs = NativeModule.require('fs');

var exts = Object.keys(Module._extensions);

if (request.charAt(0) === '/') {

paths = [''];

}

// check if the file exists and is not a directory

function tryFile(requestPath) {

try {

var stats = fs.statSync(requestPath);

if (stats && !stats.isDirectory()) {

return fs.realpathSync(requestPath);

}

} catch (e) {}

return false;

};

// given a path check a the file exists with any of the set extensions

function tryExtensions(p, extension) {

for (var i = 0, EL = exts.length; i < EL; i++) {

var filename = tryFile(p + exts[i]);

if (filename) {

return filename;

}

return false;

};

var cacheKey = JSON.stringify({request: request, paths: paths});

if (Module._pathCache[cacheKey]) {

return Module._pathCache[cacheKey];

}

// For each path

for (var i = 0, PL = paths.length; i < PL; i++) {

var basePath = path.resolve(paths[i], request);

// try to join the request to the path

var filename = tryFile(basePath);

if (!filename) {

// try it with each of the extensions

filename = tryExtensions(basePath)

}

if (!filename) {

// try it with each of the extensions at "index"

filename = tryExtensions(path.resolve(basePath, 'index'))

}

if (filename) {

Module._pathCache[cacheKey] = filename;

return filename;

}

return false;

}

Module._resolveLookupPaths = function(request, parent) {

if (NativeModule.exists(request)) {

return [request, []];

}

var start = request.substring(0, 2);

if (start !== './' && start !== '..') {

return [request, Module._paths];

}

// with --eval, parent.id is not set and parent.filename is null

if (!parent || !parent.id || !parent.filename) {

// make require('./path/to/foo') work - normally the path is taken

// from realpath(__filename) but with eval there is no filename

return [request, ['.'].concat(Module._paths)];

}

// Is the parent an index module?

// We can assume the parent has a valid extension,

// as it already has been accepted as a module.

var isIndex = /^index\.\w+?$/.test(path.basename(parent.filename));

var parentIdPath = isIndex ? parent.id : path.dirname(parent.id);

var id = path.resolve(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)]];

}

Module._load = function(request, parent) {

debug('Module._load REQUEST ' + (request) +

' parent: ' + parent.id);

var resolved = Module._resolveFilename(request, parent);

var id = resolved[0];

var filename = resolved[1];

var cachedModule = Module._cache[filename];

if (cachedModule) {

return cachedModule.exports;

}

if (NativeModule.exists(id)) {

// REPL is a special case, because it needs the real require.

if (id == 'repl') {

var replModule = new Module('repl');

replModule._compile(NativeModule.getSource('repl'), 'repl.js');

NativeModule._cache.repl = replModule;

return replModule.exports;

}

debug('load native module ' + request);

return NativeModule.require(id);

}

var module = new Module(id, parent);

Module._cache[filename] = module;

module.load(filename);

return module.exports;

};

Module._resolveFilename = function(request, parent) {

if (NativeModule.exists(request)) {

return [request, request];

}

var resolvedModule = Module._resolveLookupPaths(request, parent);

var id = resolvedModule[0];

var paths = resolvedModule[1];

// look up the filename first, since that's the cache key.

debug('looking for ' + JSON.stringify(id) +

' in ' + JSON.stringify(paths));

var filename = Module._findPath(request, paths);

if (!filename) {

throw new Error("Cannot find module '" + request + "'");

}

id = filename;

return [id, filename];

}

Module.prototype.load = function(filename) {

debug('load ' + JSON.stringify(filename) +

' for module ' + JSON.stringify(this.id));

process.assert(!this.loaded);

this.filename = filename;

var extension = path.extname(filename) || '.js';

if (!Module._extensions[extension]) extension = '.js';

Module._extensions[extension](this, filename);

this.loaded = true;

};

// Returns exception if any

Module.prototype._compile = function(content, filename) {

var self = this;

// remove shebang

content = content.replace(/^\#\!.*/, '');

function require(path) {

return Module._load(path, self);

}

require.resolve = function(request) {

return Module._resolveFilename(request, self)[1];

}

require.paths = Module._paths;

require.main = process.mainModule;

// Enable support to add extra extension types

require.extensions = Module._extensions;

require.registerExtension = removed('require.registerExtension() ' +

'removed. Use require.extensions ' +

'instead.');

require.cache = Module._cache;

var dirname = path.dirname(filename);

if (Module._contextLoad) {

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;

return runInNewContext(content, sandbox, filename, true);

}

debug('load root module');

// root module

global.require = require;

global.exports = self.exports;

global.__filename = filename;

global.__dirname = dirname;

global.module = self;

return runInThisContext(content, filename, true);

}

// create wrapper function

var wrapper = Module.wrap(content);

var compiledWrapper = runInThisContext(wrapper, filename, true);

if (filename === process.argv[1] && global.v8debug) {

global.v8debug.Debug.setBreakPoint(compiledWrapper, 0, 0);

}

var args = [self.exports, require, self, filename, dirname];

return compiledWrapper.apply(self.exports, args);

};

// Native extension for .js

Module._extensions['.js'] = function(module, filename) {

var content = NativeModule.require('fs').readFileSync(filename, 'utf8');

module._compile(content, filename);

};

// Native extension for .node

Module._extensions['.node'] = function(module, filename) {

process.dlopen(filename, module.exports);

};

// bootstrap main module.

Module.runMain = function() {

// Load the main module--the command line argument.

process.mainModule = new Module('.');

process.mainModule.load(process.argv[1]);

};

Module._initPaths = function() {

var paths = [path.resolve(process.execPath, '..', '..', 'lib', 'node')];

if (process.env['HOME']) {

paths.unshift(path.resolve(process.env['HOME'], '.node_libraries'));

paths.unshift(path.resolve(process.env['HOME'], '.node_modules'));

}

if (process.env['NODE_PATH']) {

paths = process.env['NODE_PATH'].split(':').concat(paths);

}

Module._paths = paths;

};

// bootstrap repl

Module.requireRepl = function() {

return Module._load('repl', '.');

};

Module._initPaths();

// backwards compatibility

Module.Module = Module;

return Module;

})();

// Load events module in order to access prototype elements on process like

// process.addListener.

var events = NativeModule.require('events');

// Signal Handlers

(function() {

var signalWatchers = {};

var addListener = process.addListener;

var removeListener = process.removeListener;

function isSignal(event) {

return event.slice(0, 3) === 'SIG' && lazyConstants()[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');

var w = new b.SignalWatcher(lazyConstants()[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;

};

})();

global.setTimeout = function() {

var t = NativeModule.require('timers');

return t.setTimeout.apply(this, arguments);

};

global.setInterval = function() {

var t = NativeModule.require('timers');

return t.setInterval.apply(this, arguments);

};

global.clearTimeout = function() {

var t = NativeModule.require('timers');

return t.clearTimeout.apply(this, arguments);

};

global.clearInterval = function() {

var t = NativeModule.require('timers');

return t.clearInterval.apply(this, arguments);

};

var stdout, stdin;

process.__defineGetter__('stdout', function() {

if (stdout) return stdout;

var binding = process.binding('stdio'),

net = NativeModule.require('net'),

fs = NativeModule.require('fs'),

tty = NativeModule.require('tty'),

fd = binding.stdoutFD;

if (binding.isatty(fd)) {

stdout = new tty.WriteStream(fd);

} else 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;

});

process.__defineGetter__('stdin', function() {

if (stdin) return stdin;

var binding = process.binding('stdio'),

net = NativeModule.require('net'),

fs = NativeModule.require('fs'),

tty = NativeModule.require('tty'),

fd = binding.openStdin();

if (binding.isatty(fd)) {

stdin = new tty.ReadStream(fd);

} else if (binding.isStdinBlocking()) {

stdin = new fs.ReadStream(null, {fd: fd});

} else {

stdin = new net.Stream(fd);

stdin.readable = true;

}

return stdin;

});

process.openStdin = function() {

process.stdin.resume();

return process.stdin;

};

// Lazy load console object

global.__defineGetter__('console', function() {

return NativeModule.require('console');

});

global.Buffer = NativeModule.require('buffer').Buffer;

process.exit = function(code) {

process.emit('exit', code || 0);

process.reallyExit(code || 0);

};

process.kill = function(pid, sig) {

sig = sig || 'SIGTERM';

if (!lazyConstants()[sig]) throw new Error('Unknown signal: ' + sig);

process._kill(pid, lazyConstants()[sig]);

};

var cwd = process.cwd();

var path = NativeModule.require('path');

var isWindows = process.platform === 'win32';

// Make process.argv[0] and process.argv[1] into full paths, but only

// touch argv[0] if it's not a system $PATH lookup.

// TODO: Make this work on Windows as well. Note that "node" might

// execute cwd\node.exe, or some %PATH%\node.exe on Windows,

// and that every directory has its own cwd, so d:node.exe is valid.

var argv0 = process.argv[0];

if (!isWindows && argv0.indexOf('/') !== -1 && argv0.charAt(0) !== '/') {

process.argv[0] = path.join(cwd, process.argv[0]);

}

// To allow people to extend Node in different ways, this hook allows

// one to drop a file lib/_third_party_main.js into the build directory

// which will be executed instead of Node's normal loading.

if (NativeModule.exists('_third_party_main')) {

process.nextTick(function () {

NativeModule.require('_third_party_main');

});

return;

}

if (process.argv[1]) {

if (process.argv[1] == 'debug') {

// Start the debugger agent

var d = NativeModule.require('_debugger');

d.start();

return;

}

// Load Module

// make process.argv[1] into a full path

if (!(/^http:\/\//).exec(process.argv[1])) {

process.argv[1] = path.resolve(process.argv[1]);

}

// REMOVEME: nextTick should not be necessary. This hack to get

// test/simple/test-exception-handler2.js working.

process.nextTick(Module.runMain);

return;

}

if (process._eval) {

// -e, --eval

var rv = new Module()._compile('return eval(process._eval)', 'eval');

console.log(rv);

return;

}

// REPL

Module.requireRepl().start();

});

node/src/node.js at http_agent · Andypro1/node · GitHub

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