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// 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.
'use strict';
const binding = process.binding('contextify');
const Script = binding.ContextifyScript;
// The binding provides a few useful primitives:
// - Script(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.
const realRunInThisContext = Script.prototype.runInThisContext;
const realRunInContext = Script.prototype.runInContext;
Script.prototype.runInThisContext = function(options) {
if (options && options.breakOnSigint && process._events.SIGINT) {
return sigintHandlersWrap(realRunInThisContext, this, [options]);
} else {
return realRunInThisContext.call(this, options);
}
};
Script.prototype.runInContext = function(contextifiedSandbox, options) {
if (options && options.breakOnSigint && process._events.SIGINT) {
return sigintHandlersWrap(realRunInContext, this,
[contextifiedSandbox, options]);
} else {
return realRunInContext.call(this, contextifiedSandbox, options);
}
};
Script.prototype.runInNewContext = function(sandbox, options) {
var context = createContext(sandbox);
return this.runInContext(context, options);
};
function createContext(sandbox) {
if (sandbox === undefined) {
sandbox = {};
} else if (binding.isContext(sandbox)) {
return sandbox;
}
binding.makeContext(sandbox);
return sandbox;
}
function createScript(code, options) {
return new Script(code, options);
}
// Remove all SIGINT listeners and re-attach them after the wrapped function
// has executed, so that caught SIGINT are handled by the listeners again.
function sigintHandlersWrap(fn, thisArg, argsArray) {
// Using the internal list here to make sure `.once()` wrappers are used,
// not the original ones.
let sigintListeners = process._events.SIGINT;
if (Array.isArray(sigintListeners))
sigintListeners = sigintListeners.slice();
else
sigintListeners = [sigintListeners];
process.removeAllListeners('SIGINT');
try {
return fn.apply(thisArg, argsArray);
} finally {
// Add using the public methods so that the `newListener` handler of
// process can re-attach the listeners.
for (const listener of sigintListeners) {
process.addListener('SIGINT', listener);
}
}
}
function runInDebugContext(code) {
return binding.runInDebugContext(code);
}
function runInContext(code, contextifiedSandbox, options) {
return createScript(code, options)
.runInContext(contextifiedSandbox, options);
}
function runInNewContext(code, sandbox, options) {
return createScript(code, options).runInNewContext(sandbox, options);
}
function runInThisContext(code, options) {
return createScript(code, options).runInThisContext(options);
}
module.exports = {
Script,
createContext,
createScript,
runInDebugContext,
runInContext,
runInNewContext,
runInThisContext,
isContext: binding.isContext
};
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