#include "headers.h"

const char REQ_HTTP[] = 
  {
  "GET %s HTTP/1.0\r\nHost: %s\r\n\r\n"
  };


int reqgen_http(const char *path, const char *fqdn, char **nbuf)
  {
  int buflen;

  buflen = (strlen(REQ_HTTP) + strlen(path) + strlen(fqdn) + 1);

  if( !(*nbuf = calloc(buflen, sizeof(char))))
      {
      return(ERRMEM);
      }

  sprintf(*nbuf, REQ_HTTP, path, fqdn);


  return(0);
  }

int resp_parse_http(char *data)
    {
    char *buf;

    if( NULL == (buf = calloc(4, sizeof(char))))
	{
	goto err;
	}

    /* there are nine characters between the start of data and the first character of the response code */
    data += 9;
    memcpy(buf, data, 3);
    return(atoi(buf));

    err:
    return(0);
    }

char *http_header_extract(char *key, char *data)
    {
    char *keyp, *keyp_end;
    char *returnp;

    if( NULL == (keyp = strstr(data, key)))
	{
	goto err;
	}
    else
	{
	for(; 0 != *keyp && *keyp != ':'; keyp++);
	for(; 0 != *keyp && !isalnum(*keyp); keyp++);
	for(keyp_end = keyp; 0 != *keyp_end && '\r' != *keyp_end; keyp_end++);

	if( NULL == (returnp = calloc((int) (keyp_end - keyp), sizeof(char))))
	    {
	    goto err;
	    }

	memcpy(returnp, keyp, (keyp_end - keyp));
	}

    
    return(returnp);

    err:
    return(NULL);
    }