Brokr

brokr is a javascript RPC+PUB/SUB via Websocket library that you shouldn't use.

Usage

In the browser

If you need to use Brokr in the browser, you can

• Use the included connect middleware Brokr.middleware(url) to serve a browser friendly Brokr version.
• Use the Brokr.browserify(callback) function to get the source as a string.
• Use the included build tool. Simply run make build in the Brokr module root to build the brokr.web.js file.

---

Brokr spec.

very much work in progress

brokr
    v : version     1.0
    t : type        hey, req, res, pub, sub, unsub, pserr,
    p : package     data. Format depends on type field

Meta

"Hey" package

{
    "brokr": {
        "v": "1.0",
        "t": "hey",
        "p": {
        }
    }
}

RPC

request package containing 2 requests

{
    "brokr": {
        "v": "1.0",
        "t": "req",
        "p": {
            "abcd1": {
                "fn": "ping",
                "args": []
            },
            "abcd2": {
                "fn": "time",
                "args": []
            },
        }
    }
}

response package containing 2 responses

{
    "brokr": {
        "v": "1.0",
        "t": "res",
        "p": {
            "abcd2": [null, "pong"],        //[error, data]
            "abcd1": [null, 1370981044.033] //[error, data]
        }
    }
}

PubSub

• Topics must be created on the fly.
• There is no queue

subscribe package

{
    "brokr": {
        "v": "1.0",
        "t": "sub",
        "p": {
            "abcd1": {
                "topic": "notifications"
            },
            "abcd2": {
                "topic": "new-topic"
            }
        }
    }
}

subscribe OK/err

Response to each subscription request. null means no error.

Errors codes are: (WIP)

010   That is already the case   

100   Generic client error
101   Not a subscriber

200   Generic server error

{
    "brokr": {
        "v": "1.0",
        "t": "pserr",
        "p": {
            "abcd1": null,
            "abcd2": null
        }
    }
}

unsubscribe package

{
    "brokr": {
        "v": "1.0",
        "t": "unsub",
        "p": {
            "abcd3": {
                "topic": "notifications"
            },
            "abcd4": {
                "topic": "new-topic"
            }
        }
    }
}

and the response

{
    "brokr": {
        "v": "1.0",
        "t": "pserr",
        "p": {
            "abcd3": null,
            "abcd4": null
        }
    }
}

publish package

Request that server publishes messages on topics

There is no response to this request

{
    "brokr": {
        "v": "1.0",
        "t": "pub",
        "p": {
            "notifications": [{"hello": "world"}]
        }
    }
}