Overview of js code to access OpenERP with JSON-RPC

We use the git capabilities to illustrate 3 implementation of a client js request to OpenERP using JSON.

All these implementation will:

1. Login to openerp using JSON-RPC - store a session id. - change HTML to write "Login successfull" along with the session id received.
2. Query OpenERP upon 'res.partner' for fields 'name' and 'city' - change HTML to write the result in a HTML list.

The first branch called fromscratch tries not to include any javascript from openerp, and implements the communication layer with JQuery only.

The second branch picked-oe-lib tries to make a smart pick of openerp javascript libraries, (which leads to take a whole bunch of code from openerp) to get access to the javascript communication layer used by openerp-web javascript client.

The third branch full-oe-lib uses the full javascript libraries from OpenERP.

The default branch master follows the fromscratch solution. Feel free to ask difference between branches so as to get informative differential.

Side note

If you try to test this code and your openerp is not on the same domain, these javascript solutions will be plagued by cross domain limitations.

https://developer.mozilla.org/en/http_access_control

This means that for each download of json or URL, a first exchange with the server will asks for some policies. And client HttpRequest will accept or not the script based on these permissions.

You can force your openerp server to set these headers thanks to apache when used in proxy mode by adding these in your apache configuration:

Header set Access-Control-Allow-Origin "*"
Header set Access-Control-Allow-Methods "POST, GET, OPTIONS"
Header set Access-Control-Allow-Headers "origin, content-type, accept"