krashanoff / http-parse

Simple wrapper for llhttp

I don't have a name for this

Warning

This code is incomplete! ...but it is available for you to use should you so desire. Bear in mind that I have not audited it for:

• API completeness
• Correctness
• Memory leaks

This folder supplies a wrapper around llhttp to make it easier to parse HTTP requests from C without copy-pasting a bunch of callbacks. The idea is that you could write a very simple HTTP server without too much arbitrary parsing, reinventing the wheel with these callbacks around llhttp, or using something larger like libmicrohttpd.

It uses sds for string manipulation while processing incoming requests. The project doesn't really need this requirement - it could just be standard library functions. I just think it's easier to reason about.

Ways it could be improved

• Use uthash for header storage and retrieval.
• Integrate JSON parsing for bodies.
• CORS, maybe?

Example

int main(void) {
  ll *parser = new_parser();
  assert(parser != NULL);
  const char *request_text =
    "GET / HTTP/1.1\r\nHost: google.com\r\nHost: example.com\r\nAccept: */*\r\n\r\n";
  assert(parse(parser, request_text, strlen(request_text)) >= 0);

  llrequest *request = get_request(parser);
  assert(request != NULL);

  // Case-sensitive O(n) lookup with respect to the number of headers
  const char *host_header = get_header_value(request, "Host");
  assert(strcmp(host_header, "google.com") == 0);
  return 0;
}