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http://git.haproxy.org/git/haproxy.git/
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4e21ff9244
Commit 179085c ("MEDIUM: http: move Connection header processing earlier")
introduced a regression : the backend's HTTP mode is not considered anymore
when setting the session's HTTP mode, because wait_for_request() is only
called once, when the frontend receives the request (or when the frontend
is in TCP mode, when the backend receives the request).
The net effect is that in some situations when the frontend and the backend
do not work in the same mode (eg: keep-alive vs close), the backend's mode
is ignored.
This patch moves all that processing to a dedicated function, which is
called from the original place, as well as from session_set_backend()
when switching from an HTTP frontend to an HTTP backend in different
modes.
This fix must be backported to 1.5.
273 lines
12 KiB
C
273 lines
12 KiB
C
/*
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* include/proto/proto_http.h
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* This file contains HTTP protocol definitions.
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*
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* Copyright (C) 2000-2011 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_PROTO_HTTP_H
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#define _PROTO_PROTO_HTTP_H
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#include <common/config.h>
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#include <types/proto_http.h>
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#include <types/session.h>
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#include <types/task.h>
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/*
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* some macros used for the request parsing.
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* from RFC2616:
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* CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)>
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* SEP = one of the 17 defined separators or SP or HT
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* LWS = CR, LF, SP or HT
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* SPHT = SP or HT. Use this macro and not a boolean expression for best speed.
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* CRLF = CR or LF. Use this macro and not a boolean expression for best speed.
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* token = any CHAR except CTL or SEP. Use this macro and not a boolean expression for best speed.
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*
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* added for ease of use:
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* ver_token = 'H', 'P', 'T', '/', '.', and digits.
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*/
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extern const char http_is_ctl[256];
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extern const char http_is_sep[256];
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extern const char http_is_lws[256];
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extern const char http_is_spht[256];
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extern const char http_is_crlf[256];
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extern const char http_is_token[256];
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extern const char http_is_ver_token[256];
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extern const int http_err_codes[HTTP_ERR_SIZE];
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extern struct chunk http_err_chunks[HTTP_ERR_SIZE];
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extern const char *HTTP_302;
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extern const char *HTTP_303;
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extern char *get_http_auth_buff;
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#define HTTP_IS_CTL(x) (http_is_ctl[(unsigned char)(x)])
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#define HTTP_IS_SEP(x) (http_is_sep[(unsigned char)(x)])
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#define HTTP_IS_LWS(x) (http_is_lws[(unsigned char)(x)])
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#define HTTP_IS_SPHT(x) (http_is_spht[(unsigned char)(x)])
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#define HTTP_IS_CRLF(x) (http_is_crlf[(unsigned char)(x)])
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#define HTTP_IS_TOKEN(x) (http_is_token[(unsigned char)(x)])
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#define HTTP_IS_VER_TOKEN(x) (http_is_ver_token[(unsigned char)(x)])
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int process_cli(struct session *s);
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int process_srv_data(struct session *s);
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int process_srv_conn(struct session *s);
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int http_wait_for_request(struct session *s, struct channel *req, int an_bit);
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int http_process_req_common(struct session *s, struct channel *req, int an_bit, struct proxy *px);
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int http_process_request(struct session *s, struct channel *req, int an_bit);
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int http_process_tarpit(struct session *s, struct channel *req, int an_bit);
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int http_wait_for_request_body(struct session *s, struct channel *req, int an_bit);
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int http_send_name_header(struct http_txn *txn, struct proxy* be, const char* svr_name);
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int http_wait_for_response(struct session *s, struct channel *rep, int an_bit);
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int http_process_res_common(struct session *s, struct channel *rep, int an_bit, struct proxy *px);
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int http_request_forward_body(struct session *s, struct channel *req, int an_bit);
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int http_response_forward_body(struct session *s, struct channel *res, int an_bit);
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void debug_hdr(const char *dir, struct session *s, const char *start, const char *end);
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void get_srv_from_appsession(struct session *s, const char *begin, int len);
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int apply_filter_to_req_headers(struct session *s, struct channel *req, struct hdr_exp *exp);
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int apply_filter_to_req_line(struct session *s, struct channel *req, struct hdr_exp *exp);
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int apply_filters_to_request(struct session *s, struct channel *req, struct proxy *px);
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int apply_filters_to_response(struct session *s, struct channel *rtr, struct proxy *px);
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void manage_client_side_appsession(struct session *s, const char *buf, int len);
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void manage_client_side_cookies(struct session *s, struct channel *req);
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void manage_server_side_cookies(struct session *s, struct channel *rtr);
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void check_response_for_cacheability(struct session *s, struct channel *rtr);
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int stats_check_uri(struct stream_interface *si, struct http_txn *txn, struct proxy *backend);
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void init_proto_http();
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int http_find_full_header2(const char *name, int len,
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char *sol, struct hdr_idx *idx,
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struct hdr_ctx *ctx);
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int http_find_header2(const char *name, int len,
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char *sol, struct hdr_idx *idx,
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struct hdr_ctx *ctx);
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char *find_hdr_value_end(char *s, const char *e);
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int http_header_match2(const char *hdr, const char *end, const char *name, int len);
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int http_remove_header2(struct http_msg *msg, struct hdr_idx *idx, struct hdr_ctx *ctx);
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int http_header_add_tail2(struct http_msg *msg, struct hdr_idx *hdr_idx, const char *text, int len);
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void http_sess_log(struct session *s);
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void http_perform_server_redirect(struct session *s, struct stream_interface *si);
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void http_return_srv_error(struct session *s, struct stream_interface *si);
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void http_capture_bad_message(struct error_snapshot *es, struct session *s,
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struct http_msg *msg,
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enum ht_state state, struct proxy *other_end);
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unsigned int http_get_hdr(const struct http_msg *msg, const char *hname, int hlen,
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struct hdr_idx *idx, int occ,
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struct hdr_ctx *ctx, char **vptr, int *vlen);
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void http_init_txn(struct session *s);
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void http_end_txn(struct session *s);
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void http_reset_txn(struct session *s);
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void http_adjust_conn_mode(struct session *s, struct http_txn *txn, struct http_msg *msg);
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struct http_req_rule *parse_http_req_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
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struct http_res_rule *parse_http_res_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
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void free_http_req_rules(struct list *r);
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void free_http_res_rules(struct list *r);
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struct chunk *http_error_message(struct session *s, int msgnum);
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struct redirect_rule *http_parse_redirect_rule(const char *file, int linenum, struct proxy *curproxy,
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const char **args, char **errmsg, int use_fmt);
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int smp_fetch_cookie(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
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const struct arg *args, struct sample *smp, const char *kw);
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int
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smp_fetch_base32(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
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const struct arg *args, struct sample *smp, const char *kw);
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enum http_meth_t find_http_meth(const char *str, const int len);
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struct http_req_action_kw *action_http_req_custom(const char *kw);
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struct http_res_action_kw *action_http_res_custom(const char *kw);
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static inline void http_req_keywords_register(struct http_req_action_kw_list *kw_list)
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{
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LIST_ADDQ(&http_req_keywords.list, &kw_list->list);
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}
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static inline void http_res_keywords_register(struct http_res_action_kw_list *kw_list)
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{
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LIST_ADDQ(&http_res_keywords.list, &kw_list->list);
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}
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/* to be used when contents change in an HTTP message */
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#define http_msg_move_end(msg, bytes) do { \
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unsigned int _bytes = (bytes); \
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(msg)->next += (_bytes); \
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(msg)->sov += (_bytes); \
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(msg)->eoh += (_bytes); \
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} while (0)
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/* Return the amount of bytes that need to be rewound before buf->p to access
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* the current message's headers. The purpose is to be able to easily fetch
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* the message's beginning before headers are forwarded, as well as after.
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* The principle is that msg->eoh and msg->eol are immutable while msg->sov
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* equals the sum of the two before forwarding and is zero after forwarding,
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* so the difference cancels the rewinding.
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*/
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static inline int http_hdr_rewind(const struct http_msg *msg)
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{
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return msg->eoh + msg->eol - msg->sov;
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}
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/* Return the amount of bytes that need to be rewound before buf->p to access
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* the current message's URI. The purpose is to be able to easily fetch
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* the message's beginning before headers are forwarded, as well as after.
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*/
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static inline int http_uri_rewind(const struct http_msg *msg)
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{
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return http_hdr_rewind(msg) - msg->sl.rq.u;
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}
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/* Return the amount of bytes that need to be rewound before buf->p to access
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* the current message's BODY. The purpose is to be able to easily fetch
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* the message's beginning before headers are forwarded, as well as after.
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*/
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static inline int http_body_rewind(const struct http_msg *msg)
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{
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return http_hdr_rewind(msg) - msg->eoh - msg->eol;
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}
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/* Return the amount of bytes that need to be rewound before buf->p to access
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* the current message's DATA. The difference with the function above is that
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* if a chunk is present and has already been parsed, its size is skipped so
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* that the byte pointed to is the first byte of actual data. The function is
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* safe for use in state HTTP_MSG_DATA regardless of whether the headers were
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* already forwarded or not.
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*/
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static inline int http_data_rewind(const struct http_msg *msg)
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{
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return http_body_rewind(msg) - msg->sol;
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}
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/* Return the maximum amount of bytes that may be read after the beginning of
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* the message body, according to the advertised length. The function is safe
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* for use between HTTP_MSG_BODY and HTTP_MSG_DATA regardless of whether the
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* headers were already forwarded or not.
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*/
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static inline int http_body_bytes(const struct http_msg *msg)
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{
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int len;
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len = msg->chn->buf->i - msg->sov - msg->sol;
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if (len > msg->body_len)
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len = msg->body_len;
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return len;
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}
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/* for an http-request action HTTP_REQ_ACT_TRK_*, return a tracking index
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* starting at zero for SC0. Unknown actions also return zero.
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*/
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static inline int http_req_trk_idx(int trk_action)
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{
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return trk_action - HTTP_REQ_ACT_TRK_SC0;
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}
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/* for debugging, reports the HTTP message state name */
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static inline const char *http_msg_state_str(int msg_state)
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{
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switch (msg_state) {
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case HTTP_MSG_RQBEFORE: return "MSG_RQBEFORE";
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case HTTP_MSG_RQBEFORE_CR: return "MSG_RQBEFORE_CR";
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case HTTP_MSG_RQMETH: return "MSG_RQMETH";
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case HTTP_MSG_RQMETH_SP: return "MSG_RQMETH_SP";
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case HTTP_MSG_RQURI: return "MSG_RQURI";
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case HTTP_MSG_RQURI_SP: return "MSG_RQURI_SP";
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case HTTP_MSG_RQVER: return "MSG_RQVER";
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case HTTP_MSG_RQLINE_END: return "MSG_RQLINE_END";
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case HTTP_MSG_RPBEFORE: return "MSG_RPBEFORE";
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case HTTP_MSG_RPBEFORE_CR: return "MSG_RPBEFORE_CR";
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case HTTP_MSG_RPVER: return "MSG_RPVER";
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case HTTP_MSG_RPVER_SP: return "MSG_RPVER_SP";
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case HTTP_MSG_RPCODE: return "MSG_RPCODE";
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case HTTP_MSG_RPCODE_SP: return "MSG_RPCODE_SP";
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case HTTP_MSG_RPREASON: return "MSG_RPREASON";
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case HTTP_MSG_RPLINE_END: return "MSG_RPLINE_END";
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case HTTP_MSG_HDR_FIRST: return "MSG_HDR_FIRST";
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case HTTP_MSG_HDR_NAME: return "MSG_HDR_NAME";
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case HTTP_MSG_HDR_COL: return "MSG_HDR_COL";
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case HTTP_MSG_HDR_L1_SP: return "MSG_HDR_L1_SP";
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case HTTP_MSG_HDR_L1_LF: return "MSG_HDR_L1_LF";
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case HTTP_MSG_HDR_L1_LWS: return "MSG_HDR_L1_LWS";
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case HTTP_MSG_HDR_VAL: return "MSG_HDR_VAL";
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case HTTP_MSG_HDR_L2_LF: return "MSG_HDR_L2_LF";
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case HTTP_MSG_HDR_L2_LWS: return "MSG_HDR_L2_LWS";
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case HTTP_MSG_LAST_LF: return "MSG_LAST_LF";
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case HTTP_MSG_ERROR: return "MSG_ERROR";
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case HTTP_MSG_BODY: return "MSG_BODY";
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case HTTP_MSG_100_SENT: return "MSG_100_SENT";
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case HTTP_MSG_CHUNK_SIZE: return "MSG_CHUNK_SIZE";
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case HTTP_MSG_DATA: return "MSG_DATA";
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case HTTP_MSG_CHUNK_CRLF: return "MSG_CHUNK_CRLF";
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case HTTP_MSG_TRAILERS: return "MSG_TRAILERS";
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case HTTP_MSG_DONE: return "MSG_DONE";
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case HTTP_MSG_CLOSING: return "MSG_CLOSING";
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case HTTP_MSG_CLOSED: return "MSG_CLOSED";
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case HTTP_MSG_TUNNEL: return "MSG_TUNNEL";
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default: return "MSG_??????";
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}
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}
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#endif /* _PROTO_PROTO_HTTP_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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