Cancel an HTTP GET request from Firefox Extension -

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i have firefox extension listens "http-on-modify-request" , inspects requests coming firefox. i'd able cancel request (say return fail code page) or modify uri of request can't seem it. nsihttpchannel object doesn't allow - instance

delete httpchannel;

or reseting empty request

httpchannel = components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"].createinstance(components.interfaces.nsixmlhttprequest);

don't work (and can't modify uri).

so how both intercept , modify http requests in firefox extension.

delete httpchannel; deletes variable, sort of saying httpchannel = undefined;. request unchanged. similarly, second idea sets variable point @ new nsihttpchannel instance, old request still unchanged.

to modify request, use properties , methods. see nsihttpchannel or nsichannel or nsirequest. say, can't modify uri might want cancel (see below) , replace new one. i'm not sure how imagine 1 of 3 pages has answer.

to cancel it, use nsirequest.cancel()


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