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be4653b6d4
In order to support http-response redirect, the parsing needs to be adapted a little bit to only support the "location" type, and to adjust the log-format parser so that it knows the direction of the sample fetch calls.
276 lines
12 KiB
C
276 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/stream.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 stream *s);
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int process_srv_data(struct stream *s);
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int process_srv_conn(struct stream *s);
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int http_wait_for_request(struct stream *s, struct channel *req, int an_bit);
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int http_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px);
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int http_process_request(struct stream *s, struct channel *req, int an_bit);
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int http_process_tarpit(struct stream *s, struct channel *req, int an_bit);
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int http_wait_for_request_body(struct stream *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 stream *s, struct channel *rep, int an_bit);
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int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px);
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int http_request_forward_body(struct stream *s, struct channel *req, int an_bit);
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int http_response_forward_body(struct stream *s, struct channel *res, int an_bit);
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void debug_hdr(const char *dir, struct stream *s, const char *start, const char *end);
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void get_srv_from_appsession(struct stream *s, const char *begin, int len);
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int apply_filter_to_req_headers(struct stream *s, struct channel *req, struct hdr_exp *exp);
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int apply_filter_to_req_line(struct stream *s, struct channel *req, struct hdr_exp *exp);
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int apply_filters_to_request(struct stream *s, struct channel *req, struct proxy *px);
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int apply_filters_to_response(struct stream *s, struct channel *rtr, struct proxy *px);
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void manage_client_side_appsession(struct stream *s, const char *buf, int len);
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void manage_client_side_cookies(struct stream *s, struct channel *req);
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void manage_server_side_cookies(struct stream *s, struct channel *rtr);
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void check_response_for_cacheability(struct stream *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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int http_replace_req_line(int action, const char *replace, int len, struct proxy *px, struct stream *s);
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int http_transform_header_str(struct stream* s, struct http_msg *msg, const char* name,
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unsigned int name_len, const char *str, struct my_regex *re,
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int action);
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void inet_set_tos(int fd, struct sockaddr_storage from, int tos);
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void http_perform_server_redirect(struct stream *s, struct stream_interface *si);
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void http_return_srv_error(struct stream *s, struct stream_interface *si);
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void http_capture_bad_message(struct error_snapshot *es, struct stream *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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struct http_txn *http_alloc_txn(struct stream *s);
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void http_init_txn(struct stream *s);
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void http_end_txn(struct stream *s);
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void http_reset_txn(struct stream *s);
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void http_adjust_conn_mode(struct stream *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 stream *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, int dir);
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int smp_fetch_cookie(const struct arg *args, struct sample *smp, const char *kw, void *private);
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int smp_fetch_base32(const struct arg *args, struct sample *smp, const char *kw, void *private);
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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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int val_hdr(struct arg *arg, char **err_msg);
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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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