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RAP/Protocol
Contents
Introduction
The RAP Protocol is the JSON-based format used within the HTTP-Requests from a RAP-client to a RAP-server. Compared with the previously used JavaScript and HTTP-fields based communication is will provide a number of advantages:
- It allowes to move all client-specific code from the server to the client.
- It produces human readable messages, easing debugging.
- It allowes the client to create more informative error messages.
- It allowes to replace either ends as long as they process and create valid RAP-protocol messages.
The protocol is currently beeing developed in CVS HEAD. While not fully implemented, the communication will be mixed between old and new format, e.g. JavaScript-code with embedded JSON-objects. We expect to fully switch to the new format (at least the client-to-server direction) with the 1.5 release.
Protocol Format
The protocol is based on the JSON fromat as described here: [ http://www.json.org/ ]
Message
{ "meta" : MetaObject, "operations" : [ (OperationObject)* ] }
There is one message per request and one per response. (May differ while in development.)
MetaObject
{ "requestCounter" : int }
OperationObject
TODO