Re: Hooks into PR_Write and PR_Read

On Dec 6, 9:16 am, "[email protected]" <[email protected]>
wrote:
> Hello,
>
> I'm developing an application that will hook into Mozilla Firefox PR_Read and PR_Write, which will be able to tamper requests and responses. Hooking works fine, but I'm having troubles.
>
> The hook for PR_Write works in a way that will collect all the output for an request, tamper it and do the real send, using another call to original PR_Write. My problem is that I need to write and read all the data before I return it to Firefox. I know that the sockets are in non-blocking mode, so if I get -1 as return code and last error would block, then I just pause a bit and retry sending or reading, so I return to Firefox only when all the request was sent or all the response was read.
>
> Is this the right approach? Because on some websites, I keep getting -1 and would block forever, and I get stuck in my sending or receiving loop.
>
> Any help would be greatly appreciated,
> Thanks.

Hello,

It's me again. I've passed this problem but now I got another one.
After I receive the entire response, and I start outputing it using my
PR_Recv hook, Firefox reads 4096 bytes a few times but after that it
stops reading, and after a little while around 20 seconds, it reads
again. Why is this behaviour? Even if I don't modify the response at
all, it still does the same.

Thanks !