Channel API onError codes

[Andrin von Rechenberg]

Hey there

We are using the Channel API heavily with mobile devices.

Sometimes the onError JS Callback is called with error code 0.

We are assuming that this is because connection was lost.

If that happens, can we just call channel.open() again?

Would the Google Service ever return code 0?

At the moment our JS implementation is:

function onError(error) {

  if (error.code == 0) {

    // No need to get a new token.

    channel = new goog.appengine.Channel(channel_id);

    channel.open()

  } else {

    // Google doesnt like this token anymore

    requestNewChannelID();

  }

}

We would be really screwed if Google would ever return code 0.

What are possible error codes google would return?

We also see code -1 quite often?

Cheers,

-Andrin

[Andrin von Rechenberg]

For those who are interested:

We did quite extensive testing on this and we figured out that

in the onError JS Callback of a socket you can just close

the current channel and reopen a new channel with the same

channel id if error code is "0" or "-1".

This means you can spare the expensive extra new channel opening

on the server side. This especially useful for mobile websites

that loose the connection a lot.

So far we only saw google return error code 400 or 401.

When the service is down we expect 5xx error codes.

It still would be cool if someone from Google could confirm.

Cheers,

-Andrin

[c18]

does anyone know why it is that every time i try to go to "khanacademy.com" it gives me this error?

Error: Server Error

The server encountered an error and could not complete your request.

If the problem persists, please report your problem and mention this error message and the query that caused it.