echoping/SRC/http.c

/* $Id$ */

#include "echoping.h"

#ifdef HTTP
#include "HTParse.h"


char            big_recvline[MAXTOREAD];

char           *
make_http_sendline(char *url, char *host, int port, int nocache)
{
	short           sport = (short) port;
	int             size = 200;	/* Enough? */
	char           *sendline = (char *) malloc(size);
	char           *hostname = (char *) malloc(size);
	char           *cache_directive = "";
#ifdef HTTP10
	if (nocache)
		cache_directive = "Pragma: no-cache\r\n";	/* RFC 1945,
								 * "Hypertext
								 * Transfer Protocol 
								 * -- HTTP/1.0" */
	sprintf(sendline,
		"GET %s HTTP/1.0\r\nUser-Agent: Echoping/%s\r\n%s\r\n",
		url, VERSION, cache_directive);
#else
	if (nocache) {
		if (nocache == 1)
			cache_directive = "Cache-control: max-age=0\r\n";	/* Simply 
										 * force 
										 * a
										 * recheck 
										 * with 
										 * the
										 * server 
										 */
		else
			cache_directive = "Cache-control: no-cache\r\n";	/* RFC 
										 * 2616 
										 * "Hypertext
										 * Transfer
										 * Protocol --
										 * HTTP/1.1" */
	}
	strcpy(hostname, HTParse(url, "", PARSE_HOST));
	if (!strcmp(hostname, ""))
		sprintf(hostname, "%s:%d", host, sport);
	sprintf(sendline,
		"GET %s HTTP/1.1\r\nUser-Agent: Echoping/%s\r\nHost: %s\r\nConnection: close\r\n%s\r\n",
		url, VERSION, hostname, cache_directive);
	free(hostname);
#endif
	return sendline;
}

int
read_from_server(CHANNEL fs, short ssl, boolean accept_redirects)
{
	int             nr = 0;
	int             total = 0;
	char            reply_code;
	int             first_line = TRUE;
	short           body = FALSE;
#ifdef OPENSSL
	int             sslcode;
#endif
	while (!body && !timeout_flag) {
		if (!ssl)
			nr = readline(fs.fs, big_recvline, MAXTOREAD, TRUE);
#ifdef OPENSSL
		else {
			nr = SSL_readline(fs.ssl, big_recvline, MAXTOREAD, TRUE);
			if (nr == -1) {
				sslcode = ERR_get_error();
				err_ret("SSL_readline error: %s",
					ERR_error_string(sslcode, NULL));
			}
		}
#endif
#ifdef GNUTLS
		else
		{
			nr = TLS_readline(fs.tls, big_recvline, MAXTOREAD, TRUE);
			if (nr == -1) {
				err_ret("TLS_readline error: %s",
					gnutls_strerror(nr));
			}
		}
#endif
		/* 
		 * printf ("DEBUG: reading \"%s\"\n (%d chars)\n",
		 * big_recvline, nr);
		 */
		/* 
		 * HTTP replies should be separated by CR-LF. Unfortunately,
		 * some servers send only CR :-(
		 */
		body = ((nr == 2) || (nr == 1));	/* Empty line CR-LF seen */
		if ((nr < 1) && (timeout_flag))	/* Probably a timeout */
			return -1;
		if (nr < 1)
			/* SourceForge bug #109385 */
			/* err_sys ("Error reading HTTP header"); */
			return -1;
		/* 
		 * if ((int) big_recvline[nr-1] == 10) nr--;
		 */
		if (first_line) {
			reply_code = big_recvline[9];	/* 9 because "HTTP/1.x
							 * 200..." */
			if (reply_code != '2'
			    && !(reply_code == '3' && accept_redirects))
				/* 
				 * Status codes beginning with 3 are not
				 * errors See bug #850674 and RFC 2616,
				 * section 10.3
				 */
				err_quit("HTTP error \"%s\"", big_recvline);
		}
		total = total + nr;
		first_line = FALSE;
	}
	/* Read the body */
	if (!ssl)
		nr = readline(fs.fs, big_recvline, MAXTOREAD, FALSE);
#ifdef OPENSSL
	else
		nr = SSL_readline(fs.ssl, big_recvline, MAXTOREAD, FALSE);
#endif
#ifdef GNUTLS
	else
	nr = TLS_readline(fs.tls, big_recvline, MAXTOREAD, FALSE);
#endif
	/* 
	 * printf ("DEBUG: reading body \"%s\"\n (%d chars)\n", big_recvline,
	 * nr);
	 */
	if ((nr < 2) && (timeout_flag))	/* Probably a timeout */
		return -1;
	if (nr < 2)		/* Hmm, if the body is empty, we'll get a *
				 * meaningless error message */
		err_sys("Error reading HTTP body");
	total = total + nr;
	return total;		/* How to do if we want only the body's size? */
}

#endif				/* HTTP */