/*
  include/proto/proto_http.h
  This file contains HTTP protocol definitions.

  Copyright (C) 2000-2007 Willy Tarreau - w@1wt.eu
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation, version 2.1
  exclusively.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef _PROTO_PROTO_HTTP_H
#define _PROTO_PROTO_HTTP_H

#include <common/config.h>
#include <types/proto_http.h>
#include <types/session.h>
#include <types/task.h>

/*
 * some macros used for the request parsing.
 * from RFC2616:
 *   CTL                 = <any US-ASCII control character (octets 0 - 31) and DEL (127)>
 *   SEP                 = one of the 17 defined separators or SP or HT
 *   LWS                 = CR, LF, SP or HT
 *   SPHT                = SP or HT. Use this macro and not a boolean expression for best speed.
 *   CRLF                = CR or LF. Use this macro and not a boolean expression for best speed.
 *   token               = any CHAR except CTL or SEP. Use this macro and not a boolean expression for best speed.
 *
 * added for ease of use:
 *   ver_token           = 'H', 'P', 'T', '/', '.', and digits.
 */

extern const char http_is_ctl[256];
extern const char http_is_sep[256];
extern const char http_is_lws[256];
extern const char http_is_spht[256];
extern const char http_is_crlf[256];
extern const char http_is_token[256];
extern const char http_is_ver_token[256];

#define HTTP_IS_CTL(x)   (http_is_ctl[(unsigned char)(x)])
#define HTTP_IS_SEP(x)   (http_is_sep[(unsigned char)(x)])
#define HTTP_IS_LWS(x)   (http_is_lws[(unsigned char)(x)])
#define HTTP_IS_SPHT(x)  (http_is_spht[(unsigned char)(x)])
#define HTTP_IS_CRLF(x)  (http_is_crlf[(unsigned char)(x)])
#define HTTP_IS_TOKEN(x) (http_is_token[(unsigned char)(x)])
#define HTTP_IS_VER_TOKEN(x) (http_is_ver_token[(unsigned char)(x)])

int event_accept(int fd);
void process_session(struct task *t, struct timeval *next);
int process_cli(struct session *t);
int process_srv(struct session *t);

void client_retnclose(struct session *s, const struct chunk *msg);
void client_return(struct session *s, const struct chunk *msg);
void srv_close_with_err(struct session *t, int err, int finst,
			int status, const struct chunk *msg);

int produce_content(struct session *s);
int produce_content_stats(struct session *s);
int produce_content_stats_proxy(struct session *s, struct proxy *px);
void debug_hdr(const char *dir, struct session *t, const char *start, const char *end);
void get_srv_from_appsession(struct session *t, const char *begin, int len);
int apply_filter_to_req_headers(struct session *t, struct buffer *req, struct hdr_exp *exp);
int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp);
int apply_filters_to_request(struct session *t, struct buffer *req, struct hdr_exp *exp);
int apply_filters_to_response(struct session *t, struct buffer *rtr, struct hdr_exp *exp);
void manage_client_side_cookies(struct session *t, struct buffer *req);
void manage_server_side_cookies(struct session *t, struct buffer *rtr);
void check_response_for_cacheability(struct session *t, struct buffer *rtr);
int stats_check_uri_auth(struct session *t, struct proxy *backend);
void init_proto_http();

/* used to clear the cookie flags when a transaction failed on the server
 * designed by the cookie. We clear the CK_VALID bit and set the CK_DOWN.
 */
static inline void http_flush_cookie_flags(struct http_txn *txn)
{
	if ((txn->flags & TX_CK_MASK) == TX_CK_VALID)
		txn->flags ^= (TX_CK_VALID | TX_CK_DOWN);
}

#endif /* _PROTO_PROTO_HTTP_H */

/*
 * Local variables:
 *  c-indent-level: 8
 *  c-basic-offset: 8
 * End:
 */