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‎.gitignore

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node_modules

‎LICENSE

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The MIT License (MIT)
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Copyright (c) 2016 Mathias Buus
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.

‎README.md

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# why-is-node-running
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Node is running but you don't know why? why-is-node-running is here to help you.
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```
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npm install why-is-node-running
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```
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## Usage
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``` js
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var log = require('why-is-node-running')
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var net = require('net')
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function createServer () {
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var server = net.createServer()
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setInterval(function () {}, 1000)
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server.listen(0)
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}
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createServer()
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createServer()
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setTimeout(function () {
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log() // logs out active handles that are keeping node running
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}, 100)
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```
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Running the above will print
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```
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There are 4 known handle(s) keeping the process running and 0 unknown
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Known handles:
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/Users/maf/dev/node_modules/why-is-node-running/example.js:6 - setInterval(function () {}, 1000)
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/Users/maf/dev/node_modules/why-is-node-running/example.js:10 - createServer()
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/Users/maf/dev/node_modules/why-is-node-running/example.js:7 - server.listen(0)
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/Users/maf/dev/node_modules/why-is-node-running/example.js:10 - createServer()
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/Users/maf/dev/node_modules/why-is-node-running/example.js:7 - server.listen(0)
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/Users/maf/dev/node_modules/why-is-node-running/example.js:11 - createServer()
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/Users/maf/dev/node_modules/why-is-node-running/example.js:13 - setTimeout(function () {
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```
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## License
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MIT

‎core.js

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// lifted from node core, https://github.com/nodejs/node/blob/88307974e60346bc98c4e9f70a2b6918ccb6844f/src/node.js
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// needed to instrument timers
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exports.NativeModule = NativeModule
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exports.globalTimeouts = globalTimeouts
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var ContextifyScript = process.binding('contextify').ContextifyScript;
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function runInThisContext(code, options) {
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var script = new ContextifyScript(code, options);
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return script.runInThisContext();
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}
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function globalTimeouts () {
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const timers = NativeModule.require('timers');
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global.clearImmediate = timers.clearImmediate;
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global.clearInterval = timers.clearInterval;
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global.clearTimeout = timers.clearTimeout;
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global.setImmediate = timers.setImmediate;
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global.setInterval = timers.setInterval;
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global.setTimeout = timers.setTimeout;
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};
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function NativeModule(id) {
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this.filename = id + '.js';
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this.id = id;
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this.exports = {};
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this.loaded = false;
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}
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NativeModule._source = process.binding('natives');
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NativeModule._cache = {};
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NativeModule.require = function(id) {
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if (id == 'native_module') {
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return NativeModule;
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}
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var cached = NativeModule.getCached(id);
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if (cached) {
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return cached.exports;
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}
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if (!NativeModule.exists(id)) {
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throw new Error('No such native module ' + id);
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}
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process.moduleLoadList.push('NativeModule ' + id);
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var nativeModule = new NativeModule(id);
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nativeModule.cache();
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nativeModule.compile();
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return nativeModule.exports;
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};
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NativeModule.getCached = function(id) {
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return NativeModule._cache[id];
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};
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NativeModule.exists = function(id) {
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return NativeModule._source.hasOwnProperty(id);
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};
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const EXPOSE_INTERNALS = process.execArgv.some(function(arg) {
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return arg.match(/^--expose[-_]internals$/);
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});
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if (EXPOSE_INTERNALS) {
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NativeModule.nonInternalExists = NativeModule.exists;
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NativeModule.isInternal = function(id) {
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return false;
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};
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} else {
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NativeModule.nonInternalExists = function(id) {
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return NativeModule.exists(id) && !NativeModule.isInternal(id);
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};
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NativeModule.isInternal = function(id) {
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return id.startsWith('internal/');
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};
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}
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NativeModule.getSource = function(id) {
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return NativeModule._source[id];
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};
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NativeModule.wrap = function(script) {
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return NativeModule.wrapper[0] + script + NativeModule.wrapper[1];
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};
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NativeModule.wrapper = [
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'(function (exports, require, module, __filename, __dirname) { ',
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'\n});'
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];
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NativeModule.prototype.compile = function() {
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var source = NativeModule.getSource(this.id);
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source = NativeModule.wrap(source);
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var fn = runInThisContext(source, {
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filename: this.filename,
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lineOffset: 0,
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displayErrors: true
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});
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fn(this.exports, NativeModule.require, this, this.filename);
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this.loaded = true;
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};
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NativeModule.prototype.cache = function() {
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NativeModule._cache[this.id] = this;
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};

‎example.js

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var log = require('why-is-node-running')
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var net = require('net')
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function createServer () {
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var server = net.createServer()
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setInterval(function () {}, 1000)
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server.listen(0)
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}
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createServer()
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createServer()
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setTimeout(function () {
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log()
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}, 100)

‎index.js

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var core = require('./core')
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var b = process.binding
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process.binding = function (name) {
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var loaded = b(name)
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var cpy = {}
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Object.keys(loaded).forEach(function (prop) {
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if (typeof loaded[prop] === 'function' && loaded[prop].prototype) {
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var wrap = function () {
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var handle = new loaded[prop]()
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var e = new Error('whatevs')
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var stacks = require('stackback')(e)
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var path = require('path')
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handle.__WHY_IS_NODE_RUNNING__ = []
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for (var i = 1; i < stacks.length; i++) {
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handle.__WHY_IS_NODE_RUNNING__.push(stacks[i])
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}
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return handle
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}
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Object.keys(loaded[prop]).forEach(function (name) {
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wrap[name] = loaded[prop][name]
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})
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if (/^[A-Z]/.test(prop)) {
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cpy[prop] = wrap
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} else {
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cpy[prop] = loaded[prop]
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}
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} else {
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cpy[prop] = loaded[prop]
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}
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})
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return cpy
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}
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core.globalTimeouts()
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module.exports = function () {
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var handles = process._getActiveHandles()
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var unknown = 0
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var known = []
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handles.forEach(function (handle) {
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var stacks = findStacks(handle, 0)
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if (stacks) {
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known.push(stacks)
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return
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}
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unknown++
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})
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console.error('There are %d known handle(s) keeping the process running and %d unknown', known.length, unknown)
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console.error('Known handles:\n')
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known.forEach(function (stacks, i) {
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stacks = stacks.filter(function (s) {
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return s.getFileName().indexOf(require('path').sep) > -1
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})
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if (!stacks[0]) {
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console.error('(unknown stack trace)')
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} else {
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var padding = ''
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stacks.forEach(function (s) {
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var pad = (s.getFileName() + ':' + s.getLineNumber()).replace(/./g, ' ')
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if (pad.length > padding.length) padding = pad
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})
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stacks.forEach(function (s) {
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var src = require('fs').readFileSync(s.getFileName(), 'utf-8').split(/\n|\r\n/)
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var prefix = s.getFileName() + ':' + s.getLineNumber()
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console.error(prefix + padding.slice(prefix.length) + ' - ' + src[s.getLineNumber() - 1].trim())
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})
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}
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console.error()
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})
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}
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function findStacks (obj, depth) {
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if (depth === 10) return null
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var keys = Object.keys(obj)
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for (var i = 0; i < keys.length; i++) {
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var val = obj[keys[i]]
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if (keys[i] === '__WHY_IS_NODE_RUNNING__') return val
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if (typeof val === 'object' && val) {
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val = findStacks(val, depth + 1)
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if (val) return val
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}
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}
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}

‎package.json

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{
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"name": "why-is-node-running",
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"version": "0.0.0",
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"description": "Node is running but you don't know why? why-is-node-running is here to help you.",
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"main": "index.js",
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"dependencies": {
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"stackback": "0.0.2"
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},
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"devDependencies": {},
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"repository": {
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"type": "git",
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"url": "https://github.com/mafintosh/why-is-node-running.git"
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},
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"author": "Mathias Buus (@mafintosh)",
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"license": "MIT",
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"bugs": {
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"url": "https://github.com/mafintosh/why-is-node-running/issues"
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},
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"homepage": "https://github.com/mafintosh/why-is-node-running"
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}

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