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API Mate

API Mate is a web application (a simple web page) to access the APIs of BigBlueButton and Mconf.

Usage

Passing parameters in the URL

The API Mate HTML page accepts parameters in the URL to pre-configure all the inputs available in the menu, that will define the links generated. You can, for instance, generate a link in your application to redirect to the API Mate and automatically fill the server and the shared secret fields in the API Mate so that it points to the server you want to use.

The URL below shows a few of the parameters that can be passed in the URL:

api_mate.html#server=http://my-server.com/bigbluebutton/api&sharedSecret=lsk8df74e400365b55e0987&meetingID=meeting-1234567&custom-calls=getMyData

The parameters should be passed in the hash part of the URL, so they are not submitted to the server. This means the application at http://mconf.github.io/api-mate will not receive your server's URL and shared secret. You can also pass these parameters in the search string part of the URL, but that means the server will have access to your parameters (might be useful if you're hosting your own API Mate).

The server address and shared secret are defined in the URL parameters server and sharedSecret (you can also use salt), respectively.

All the other parameters are matched by an HTML data-api-mate-param attribute that is defined in all inputs in the API Mate. The input to define the meeting ID, for example, has this attribute set as data-api-mate-param='meetingID,recordindID', so you can use both meetingID=something or recordingID=something in the URL and it will automatically fill the meeting ID input. The input to define custom API calls has the attribute set as data-api-mate-param='custom-calls', and this is why in the URL above we used custom-calls=getMyData.

Allow cross-domain requests

The API Mate runs on your web browser and most of the API methods are accesssed through HTTP GET calls, so you can simply click on a link in the API Mate and you'll access the API method.

However, for some other methods (such as API methods accessed via POST) or some more advanced features, we need to run API calls from the javascript using ajax. This will result in a cross-domain request, since a web page (the API Mate) is making requests directly to another server (your web conference server). Since cross-domain requests are by default disabled in the browser, they will all fail.

We offer two solutions:

  1. Change your BigBlueButton/Mconf-Live server to accept cross-domain requests (ok, but only recommended for development and testing); or
  2. Use a local proxy that will receive the calls and proxy them to your web conference server.

1. Change your server to accept cross-domain requests

With this option you will enable cross-origin requests using CORS on your BigBlueButton/Mconf-Live server.

In BigBlueButton/Mconf-Live with Nginx

Copy to following block of code to the bottom of the file /etc/bigbluebutton/nginx/web.nginx, inside the block location /bigbluebutton:

location /bigbluebutton {
    ...

    # add this block!
    if ($http_origin) {
        add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Allow-Methods "GET,POST,OPTIONS";
        add_header Access-Control-Allow-Headers  Content-Type;
        add_header Access-Control-Max-Age        86400;
    }
}

Notice that it will allow cross-domain requests from any host, which is not recommended! Use it only for test and development.

Save it and restart Nginx to apply the changes:

$ sudo /etc/init.d/nginx restart

If you need a more detailed and controlled example, try this one.

On Node.js with Express.js:

If you're not accessing your web conference server directly, but through an application written in Node.js, you can use the following code to enable cross-domain requests:

app.all '*', (req, res, next) ->
  res.header("Access-Control-Allow-Origin", "*")
  res.header("Access-Control-Allow-Headers", "X-Requested-With, Content-Type")
  next()

Source.

2. Use a local proxy

There's an application that can be used as a local proxy called api-mate-proxy available in this repository, in the folder proxy.

It is a very simple Node.js application that you can run locally to receive all requests from the API Mate and proxy them to your web conference server.

Usage

See api-mate-proxy's README file.

Development

At first, install Node.js (see package.json for the specific version required).

Install the dependencies with:

npm install

Then compile the source files with:

[./node_modules/.bin/]cake build

This will compile all files inside src/ to formats that can be opened in the browser and place them into /lib.

To watch for changes and compile the files automatically, run:

[./node_modules/.bin/]cake watch

License

Distributed under The MIT License (MIT), see LICENSE.