Question

Im having some trouble parsing http headers.

Here is my problem:

char resp[] = "HTTP/1.1 200 OK\r\n"
             "Content-Type: text/html\r\n"
             "Content-Length: 4\r\n"
             "\r\n"
             "text";

// some stuff
sscanf(resp, "HTTP/%f %d\r\n",&version,&code);
sscanf(resp, "%*[^]Content-Length: %d",&size);
//            ^ tried several things here

I thought using sscanf would be a good idea,since i only want to get a few values (if they exist).
My idea was to skip all the headers i dont want.

My questions are:
1-is sscanf a good idea?
2-if not what what approach would work better

Thank you.

Answer 1

To first order one should never use the *scanf functions.

Parsing HTTP headers is significantly harder than it appears. I would first see if libcurl has already implemented something you can use, and failing that, go straight to flex and bison.