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README.md
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README.md
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Access [Passport.js](http://passportjs.org) user information from [socket.io](http://socket.io) connection.
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# passport.socketio
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> Access [passport.js](http://passportjs.org) user information from a [socket.io](http://socket.io) connection.
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Installation
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============
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## Installation
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```
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npm install passport.socketio
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```
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Usage
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=====
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## Example usage
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```javascript
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//configure passport and express
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var socketIo = require("socket.io"),
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// initialize our modules
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var io = require("socket.io")(server),
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sessionStore = require('awesomeSessionStore'), // find a working session store (have a look at the readme)
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passportSocketIo = require("passport.socketio");
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var sio = socketIo.listen(webServer);
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// set authorization for socket.io
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io.set('authorization', passportSocketIo.authorize({
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cookieParse: express.cookieParse,
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key: 'express.sid', // the name of the cookie where express/connect stores its session_id
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secret: 'session_secret', // the session_secret to parse the cookie
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store: sessionStore, // we NEED to use a sessionstore. no memorystore please
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success: onAuthorizeSuccess, // *optional* callback on success - read more below
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fail: onAuthorizeFail, // *optional* callback on fail/error - read more below
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});
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function onAuthorizeSuccess(data, accept){
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console.log('successful connection to socket.io');
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//except for the optional fail and success the parameter object has the
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//same attribute than the session middleware http://www.senchalabs.org/connect/middleware-session.html
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sio.set("authorization", passportSocketIo.authorize({
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cookieParser: express.cookieParser, //or connect.cookieParser
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key: 'express.sid', //the cookie where express (or connect) stores its session id.
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secret: 'my session secret', //the session secret to parse the cookie
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store: mySessionStore, //the session store that express uses
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fail: function(data, accept) { // *optional* callbacks on success or fail
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accept(null, false); // second param takes boolean on whether or not to allow handshake
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},
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success: function(data, accept) {
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// The accept-callback still allows us to decide whether to
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// accept the connection or not.
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accept(null, true);
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}
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}));
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}
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sio.sockets.on("connection", function(socket){
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console.log("user connected: ", socket.handshake.user.name);
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//filter sockets by user...
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var userGender = socket.handshake.user.gender,
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opposite = userGender === "male" ? "female" : "male";
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passportSocketIo.filterSocketsByUser(sio, function (user) {
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return user.gender === opposite;
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}).forEach(function(s){
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s.send("a " + userGender + " has arrived!");
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});
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});
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function onAuthorizeFail(data, message, error, accept){
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if(critical)
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throw new Error(message);
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console.log('failed connection to socket.io:', message);
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// We use this callback to log all of our failed connections.
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accept(null, false);
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}
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```
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__Note:__ in the client-side use `io.connect()` or `io.connect('http://the-same-domain.com')` because Socket.io can work with CORS but the browser will not send the cookies.
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## passport.socketio - Options
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Develop
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=======
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### `store` [function] **required**:
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*Always* provide one. If you don't know what sessionStore to use, have a look at [this list](https://github.com/senchalabs/connect/wiki#session-stores).
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Also be sure to use the same sessionStore or at least a connection to *the same collection/table/whatever*. And don't forget your `express.session()` middleware:
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`app.use(express.session({ store: awesomeSessionStore }));`
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For further info about this middleware see [the official documentation](http://www.senchalabs.org/connect/session.html#session).
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npm install
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npm test
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### `cookieParser` [function] **required**:
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You have to provide your cookieParser from express: `express.cookieParser`
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License
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========
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### `key` [string] **optional**:
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Defaults to `'connect.sid'`. But you're always better of to be sure and set your own key. Don't forget to also change it in your `express.session()`:
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`app.use(express.session({ key: 'your.sid-key' }));`
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MIT - José F. Romaniello 2012.
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### `secret` [string] **optional**:
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As with `key`, also the secret you provide is optional. *But:* be sure to have one. That's always safer. You can set it like the key:
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`app.use(express.session({ secret: 'pinkie ate my cupcakes!' }));`
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### `passport` [function] **optional**:
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Defaults to `require('passport')`. If you want, you can provide your own instance of passport for whatever reason.
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### `success` [function] **optional**:
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Callback which will be called everytime a *authorized* user successfuly connects to your socket.io instance. **Always** be sure to accept/reject the connection.
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For that, there are two parameters: `function(data[object], accept[function])`. `data` contains all the user-information from passport.
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The second parameter is for accepting/rejecting connections. Use it like this:
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```javascript
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// accept connection
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accept(null, true);
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// reject connection (for whatever reason)
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accept(null, false);
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```
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### `fail` [function] **optional**:
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The name of this callback may be a little confusing. While it is called when a not-authorized-user connects, it is also called when there's a error.
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For debugging reasons you are provided with two additional parameters `function(data[object], message[string], error[bool], accept[function])`:
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```javascript
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/* ... */
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function onAuthorizeFail(data, message, error, accept){
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// error indicates whether the fail is due to an error or just a unauthorized client
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if(error){
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throw new Error(message);
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} else {
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console.log(message);
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accept(null, false); // the same accept-method as above
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}
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}
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```
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You can use the `message` parameter for debugging/logging/etc uses.
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## `socket.handshake.user`
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This property is always available from inside a `io.on('connection')` handler. If the user is authorized via passport, you can access all the properties from there.
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**Plus** you have the `socket.handshake.user.logged_in` property which tells you whether the user is currently authorized or not.
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## Additional methods
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### `passportSocketIo.filterSocketsbyUser`
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This function gives you the ability to filter all connected sockets via a user property. Needs two parameters `function(io, function(user))`. Example:
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```javascript
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passportSocketIo.filterSocketsByUser(io, function(user){
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return user.gender === 'female';
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}).forEach(function(socket){
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socket.send('msg', 'hello, woman!');
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});
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```
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## Notes:
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* Does **NOT** support cookie-based sessions. eg: `express.cookieSession`
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* If the connection fails, check if you are requesting from a client via CORS. Check `socket.handshake.xdomain === true` as there are no cookies sent.
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## Contribute
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You are always welcome to open an issue or provide a pull-request!
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Also check out the unit tests:
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```bash
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npm test
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```
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## License
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Licensed under the MIT-License.
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2012-2013 José F. Romaniello.
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