8889841cPK>[R8UU inflight.jsnuW+Avar wrappy = require('wrappy') var reqs = Object.create(null) var once = require('once') module.exports = wrappy(inflight) function inflight (key, cb) { if (reqs[key]) { reqs[key].push(cb) return null } else { reqs[key] = [cb] return makeres(key) } } function makeres (key) { return once(function RES () { var cbs = reqs[key] var len = cbs.length var args = slice(arguments) // XXX It's somewhat ambiguous whether a new callback added in this // pass should be queued for later execution if something in the // list of callbacks throws, or if it should just be discarded. // However, it's such an edge case that it hardly matters, and either // choice is likely as surprising as the other. // As it happens, we do go ahead and schedule it for later execution. try { for (var i = 0; i < len; i++) { cbs[i].apply(null, args) } } finally { if (cbs.length > len) { // added more in the interim. // de-zalgo, just in case, but don't call again. cbs.splice(0, len) process.nextTick(function () { RES.apply(null, args) }) } else { delete reqs[key] } } }) } function slice (args) { var length = args.length var array = [] for (var i = 0; i < length; i++) array[i] = args[i] return array } PK>[|w README.mdnuW+A# inflight Add callbacks to requests in flight to avoid async duplication ## USAGE ```javascript var inflight = require('inflight') // some request that does some stuff function req(key, callback) { // key is any random string. like a url or filename or whatever. // // will return either a falsey value, indicating that the // request for this key is already in flight, or a new callback // which when called will call all callbacks passed to inflightk // with the same key callback = inflight(key, callback) // If we got a falsey value back, then there's already a req going if (!callback) return // this is where you'd fetch the url or whatever // callback is also once()-ified, so it can safely be assigned // to multiple events etc. First call wins. setTimeout(function() { callback(null, key) }, 100) } // only assigns a single setTimeout // when it dings, all cbs get called req('foo', cb1) req('foo', cb2) req('foo', cb3) req('foo', cb4) ``` PK>[?&LICENSEnuW+AThe ISC License Copyright (c) Isaac Z. Schlueter Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. PK>[| Z package.jsonnuW+A{ "name": "inflight", "version": "1.0.6", "description": "Add callbacks to requests in flight to avoid async duplication", "main": "inflight.js", "files": [ "inflight.js" ], "dependencies": { "once": "^1.3.0", "wrappy": "1" }, "devDependencies": { "tap": "^7.1.2" }, "scripts": { "test": "tap test.js --100" }, "repository": { "type": "git", "url": "https://github.com/npm/inflight.git" }, "author": "Isaac Z. Schlueter (http://blog.izs.me/)", "bugs": { "url": "https://github.com/isaacs/inflight/issues" }, "homepage": "https://github.com/isaacs/inflight", "license": "ISC" } PK>[R8UU inflight.jsnuW+APK>[|w README.mdnuW+APK>[?& LICENSEnuW+APK>[| Z  package.jsonnuW+APK'