OMG! Squeee! Parsing HTTP responses in C!

And ok, it's a bit half assed at the moment, all I'm doing is splitting on the colon, but to get there I've copied/adapted the code from K&R for streamed input (FILE* stuff) to wrap the low level tcp_read, which gives me (the equivalent to) buffered getch, so I can now build up to a proper parser, if that's what I want.

I'm still thinking about it. I know I want the output to be an ObjInstance*, with fields for status, headers (a nested instance) and body (which is probably going to be an ObjString*, except I want to to be file backed if it's bigger than a couple of meg, or if it's binary).

TODO

• Symbolic access to object fields (e.g., o["name"]). Easy, just need to adapt OP_GET/SET_INDEX
• "Proper" header parsing. I should be ignoring the ignorable whitespace, and joining joinable header values
• Maybe flatten header names to lower case and strip non-alphanumerics.
• Read-to-end on errors, but I'm not sure about that - if the server sends me a bad response I should just go ahead and close the connection, I don't want to waste time trying to recover (and I'm fairly sure that's what the standard says)
• Do something sensible with bodies.

But ignoring those, squeee!