Google Chrome extention modifying page request

Question

Is it possible to catch the request of a page before it is sent out? I would like to check and modify the data sent out. For example if I have a text box on a page and the form was submitted I would like to get to the data of the text box using the extention modify it and then send it on it's way.

If any one can point me in the right direction that would be grate

Thanks Eli

Answer 1

Chrome has chrome.experimental.webRequest API module which allows to catch web requests before they are sent, but from the docs it doesn't look like you can modify them, just observe.

I think you would be better off injecting a content script to pages and listening to onbeforesubmit event on forms.