Connection AJAX, CouchDB and JavaScript

Question

i\'ve got a little problem with AJAX, CouchDB and JavaScript.

I can open the following URL from CouchDB in my browser: http://192.168.1.58:5984/mydb/name

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Answer 1

The problem here is, that your browser doesn't allow you to make a query on an other web server than the one where you're script originates. (Google for: Same Origin Policy)

But there is a kind of a common technique which is a workaround for this use case. It's called JSONP. Since version 1.0 you have to activate this functionality first in CouchDB. In the section [httpd] of your CouchDB configuration file (.ini) you have to add an

allow_jsonp = true

After this is done you can produce JSONP queries on your CouchDB. Basically adding dynamically lines like this:

But for details refer to the article linked above.

Anyway I propose on the JavaScript side of things to use a Framework as jQuery, DojoToolKit, ect. In jQuery e.g. it is enough to add "?callback=?" at the end of the URL.