Initial commit.

.gitignore

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+node_modules

LICENSE

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+This software is released under the MIT license:
+
+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.

README.md

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+# get-youtube-id
+
+Parse a youtube url returning the video ID.
+
+# Installation
+
+```
+npm install get-youtube-id
+```
+
+# Example
+
+``` js
+var getYouTubeID = require('get-youtube-id');
+
+var id = getYouTubeID("http://www.youtube.com/watch?v=9bZkp7q19f0");
+console.log(id); // "9bZkp7q19f0"
+```
+
+# License
+
+MIT

index.js

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+
+function getYouTubeID(url) {
+  if (/youtu\.?be/.test(url)) {
+
+    // Look first for known patterns
+    var i;
+    var patterns = [
+      /youtu\.be\/([^#\&\?]{11})/,  // youtu.be/<id>
+      /\?v=([^#\&\?]{11})/,         // ?v=<id>
+      /\&v=([^#\&\?]{11})/,         // &v=<id>
+      /embed\/([^#\&\?]{11})/,      // embed/<id>
+      /\/v\/([^#\&\?]{11})/         // /v/<id>
+    ];
+
+    // If any pattern matches, return the ID
+    for (i = 0; i < patterns.length; ++i) {
+      if (patterns[i].test(url)) {
+        return patterns[i].exec(url)[1];
+      }
+    }
+
+    // If that fails, break it apart by certain characters and look 
+    // for the 11 character key
+    var tokens = url.split(/[\/\&\?=#\.\s]/g);
+    for (i = 0; i < tokens.length; ++i) {
+      if (/^[^#\&\?]{11}$/.test(tokens[i])) {
+        return tokens[i];
+      }
+    }
+  }
+
+  return null;
+}
+
+if(typeof exports !== 'undefined') {
+  module.exports = getYouTubeID;
+}

package.json

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+{
+  "name": "get-youtube-id",
+  "version": "0.1.0",
+  "description": "Parse a youtube url returning the video ID.",
+  "main": "index.js",
+  "bin": {},
+  "directories": {
+    "test": "test"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "tape": "~0.2.2"
+  },
+  "scripts": {
+    "test": "node test"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/substack/get-youtube-id.git"
+  },
+  "homepage": "https://github.com/jmorrell/get-youtube-id",
+  "keywords": [
+    "youtube",
+    "url"
+  ],
+  "author": "Jeremy Morrell <morrell.jeremy@gmail.com>",
+  "license": "MIT",
+  "readmeFilename": "README.md"
+}

test/index.js

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+var test = require('tape');
+var getYouTubeID = require('../index.js');
+
+// A bunch of youtube url formats collection from Stack Overflow. All of them
+// should resolve to a specific video. Pull requests welcome if more example
+// types can be found.
+var tests = [
+  { expectedID: '-wtIMTCHWuI', url: 'http://www.youtube.com/watch?v=-wtIMTCHWuI' },
+  { expectedID: '-wtIMTCHWuI', url: 'http://www.youtube.com/v/-wtIMTCHWuI?version=3&autohide=1' },
+  { expectedID: '-wtIMTCHWuI', url: 'http://youtu.be/-wtIMTCHWuI' },
+  { expectedID: 'zc0s358b3Ys', url: 'http://www.youtube.com/embed/zc0s358b3Ys' },
+  { expectedID: '-wtIMTCHWuI', url: ' http://www.youtube.com/watch?v=-wtIMTCHWuI ' },
+  { expectedID: 'zc0s358b3Ys', url: 'http://youtu.be/zc0s358b3Ys' },
+  { expectedID: 'u8nQa1cJyX8', url: 'http://www.youtube.com/watch?v=u8nQa1cJyX8&a=GxdCwVVULXctT2lYDEPllDR0LRTutYfW' },
+  { expectedID: 'u8nQa1cJyX8', url: 'http://www.youtube.com/watch?v=u8nQa1cJyX8' },
+  { expectedID: 'zc0s358b3Ys', url: 'http://youtu.be/zc0s358b3Ys' },
+  { expectedID: 'zc0s358b3Ys', url: 'http://youtu.be/zc0s358b3Ys' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/watch?v=0zM3nApSvMg&feature=feedrec_grec_index' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/v/0zM3nApSvMg?fs=1&hl=en_US&rel=0' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/watch?v=0zM3nApSvMg#t=0m10s' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/embed/0zM3nApSvMg?rel=0' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/watch?v=0zM3nApSvMg' },
+  { expectedID: '0zM3nApSvMg', url: 'http://youtu.be/0zM3nApSvMg' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/v/0zM3nApSvMg?fs=1&hl=en_US&rel=0' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/embed/0zM3nApSvMg?rel=0' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/watch?v=0zM3nApSvMg&feature=feedrec_grec_index' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/watch?v=0zM3nApSvMg' },
+  { expectedID: '0zM3nApSvMg', url: 'http://youtu.be/0zM3nApSvMg' },
+  { expectedID: '0zM3nApSvMg', url: 'http://www.youtube.com/watch?v=0zM3nApSvMg#t=0m10s' },
+  { expectedID: 'QdK8U-VIH_o', url: 'http://www.youtube.com/user/IngridMichaelsonVEVO#p/a/u/1/QdK8U-VIH_o' },
+  { expectedID: 'LXilEPmkoQY', url: 'http://www.youtube.com/embed/LXilEPmkoQY' },
+  { expectedID: 'LXilEPmkoQY', url: 'http://www.youtube.com/v/LXilEPmkoQY' },
+  { expectedID: 'u8nQa1cJyX8', url: 'http://www.youtube.com/watch?argv=xyzxyzxyzxy&v=u8nQa1cJyX8' },
+  { expectedID: '0zM3nApSvMg', url: 'youtube.com/watch?feature=feedrec_grec_index&v=0zM3nApSvMg ' },
+  { expectedID: 'y_Rd2hByRyc', url: 'http://www.youtube.com/watch?feature=player_embedded&v=y_Rd2hByRyc' }
+];
+
+test('match example cases', function(t) {
+  t.plan(tests.length);
+
+  tests.forEach(function(testCase) {
+    t.equal(getYouTubeID(testCase.url), testCase.expectedID, 'URL: ' + testCase.url);
+  });
+
+});