/* See COPYING file for copyright, license and warranty details. */

#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>

void die(char *msg) {
	fputs(msg, stderr);
	exit(EXIT_FAILURE);
}

/* plundered from suckless' sic */
static int dial(char *host, char *port) {
	static struct addrinfo hints;
	int srv;
	struct addrinfo *res, *r;

	memset(&hints, 0, sizeof hints);
	hints.ai_family = AF_UNSPEC;
	hints.ai_socktype = SOCK_STREAM;
	if(getaddrinfo(host, port, &hints, &res) != 0)
		die("error: cannot resolve hostname\n");
	for(r = res; r; r = r->ai_next) {
		if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
			continue;
		if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
			break;
		close(srv);
	}
	freeaddrinfo(res);
	if(!r)
		die("error: cannot connect to host\n");
	return srv;
}

char *get(FILE *srv, char *host, char *path) {
	size_t l, res;
	int fd, i;
	char *buf, *c, *p;

	fprintf(srv, "GET %s HTTP/1.0\r\nUser-Agent: getgbook-"VERSION" (not mozilla)\r\nHost: %s\r\n\r\n", path, host);

	fflush(srv);

	l=0;
	fd = fileno(srv);

	buf = malloc(sizeof(char *) * 4096);
	for(i=0; (res = read(fd, buf+l, 4096)) > 0; l+=res, i++)
		buf = realloc(buf, sizeof(char *) * (l+4096));

	/* check that it's a 200 */
	if(strncmp(buf+9, "200 ", 4)) {
		free(buf);
		return NULL;
	}

	/* exclude header */
	for(p = buf; *p && *(p+1) && *(p+2) && *(p+3); p++)
		if(!strncmp(p, "\r\n\r\n", 4)) break;
	p+=4;
	
	i = l - (p - buf);
	c = malloc(i);
	memcpy(c, p, i);
	free(buf);

	return c;
}