node/lib/vm.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var binding = process.binding('contextify');
var Script = binding.ContextifyScript;
var util = require('util');

// The binding provides a few useful primitives:
// - ContextifyScript(code, { filename = "evalmachine.anonymous",
//                            displayErrors = true } = {})
//   with methods:
//   - runInThisContext({ displayErrors = true } = {})
//   - runInContext(sandbox, { displayErrors = true, timeout = undefined } = {})
// - makeContext(sandbox)
// - isContext(sandbox)
// From this we build the entire documented API.

Script.prototype.runInNewContext = function(sandbox, options) {
  var context = exports.createContext(sandbox);
  return this.runInContext(context, options);
};

exports.Script = Script;

exports.createScript = function(code, options) {
  return new Script(code, options);
};

exports.createContext = function(sandbox) {
  if (util.isUndefined(sandbox)) {
    sandbox = {};
  } else if (binding.isContext(sandbox)) {
    return sandbox;
  }

  binding.makeContext(sandbox);
  return sandbox;
};

exports.runInContext = function(code, contextifiedSandbox, options) {
  var script = new Script(code, options);
  return script.runInContext(contextifiedSandbox, options);
};

exports.runInNewContext = function(code, sandbox, options) {
  var script = new Script(code, options);
  return script.runInNewContext(sandbox, options);
};

exports.runInThisContext = function(code, options) {
  var script = new Script(code, options);
  return script.runInThisContext(options);
};

exports.isContext = binding.isContext;