| /* |
| * Functions to manipulate HTTP messages using the internal representation. |
| * |
| * Copyright (C) 2018 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| */ |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <ctype.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| |
| #include <haproxy/api.h> |
| #include <haproxy/arg.h> |
| #include <haproxy/cfgparse.h> |
| #include <haproxy/global.h> |
| #include <haproxy/h1.h> |
| #include <haproxy/http.h> |
| #include <haproxy/http_fetch.h> |
| #include <haproxy/http_htx.h> |
| #include <haproxy/htx.h> |
| #include <haproxy/log.h> |
| #include <haproxy/regex.h> |
| #include <haproxy/sample.h> |
| #include <haproxy/tools.h> |
| |
| |
| struct buffer http_err_chunks[HTTP_ERR_SIZE]; |
| struct http_reply http_err_replies[HTTP_ERR_SIZE]; |
| |
| struct eb_root http_error_messages = EB_ROOT; |
| struct list http_errors_list = LIST_HEAD_INIT(http_errors_list); |
| struct list http_replies_list = LIST_HEAD_INIT(http_replies_list); |
| |
| /* The declaration of an errorfiles/errorfile directives. Used during config |
| * parsing only. */ |
| struct conf_errors { |
| char type; /* directive type (0: errorfiles, 1: errorfile) */ |
| union { |
| struct { |
| int status; /* the status code associated to this error */ |
| struct http_reply *reply; /* the http reply for the errorfile */ |
| } errorfile; /* describe an "errorfile" directive */ |
| struct { |
| char *name; /* the http-errors section name */ |
| char status[HTTP_ERR_SIZE]; /* list of status to import (0: ignore, 1: implicit import, 2: explicit import) */ |
| } errorfiles; /* describe an "errorfiles" directive */ |
| } info; |
| |
| char *file; /* file where the directive appears */ |
| int line; /* line where the directive appears */ |
| |
| struct list list; /* next conf_errors */ |
| }; |
| |
| /* Returns the next unporocessed start line in the HTX message. It returns NULL |
| * if the start-line is undefined (first == -1). Otherwise, it returns the |
| * pointer on the htx_sl structure. |
| */ |
| struct htx_sl *http_get_stline(const struct htx *htx) |
| { |
| struct htx_blk *blk; |
| |
| blk = htx_get_first_blk(htx); |
| if (!blk || (htx_get_blk_type(blk) != HTX_BLK_REQ_SL && htx_get_blk_type(blk) != HTX_BLK_RES_SL)) |
| return NULL; |
| return htx_get_blk_ptr(htx, blk); |
| } |
| |
| /* Returns the headers size in the HTX message */ |
| size_t http_get_hdrs_size(struct htx *htx) |
| { |
| struct htx_blk *blk; |
| size_t sz = 0; |
| |
| blk = htx_get_first_blk(htx); |
| if (!blk || htx_get_blk_type(blk) > HTX_BLK_EOH) |
| return sz; |
| |
| for (; blk; blk = htx_get_next_blk(htx, blk)) { |
| sz += htx_get_blksz(blk); |
| if (htx_get_blk_type(blk) == HTX_BLK_EOH) |
| break; |
| } |
| return sz; |
| } |
| |
| /* Finds the first or next occurrence of header matching <pattern> in the HTX |
| * message <htx> using the context <ctx>. This structure holds everything |
| * necessary to use the header and find next occurrence. If its <blk> member is |
| * NULL, the header is searched from the beginning. Otherwise, the next |
| * occurrence is returned. The function returns 1 when it finds a value, and 0 |
| * when there is no more. It is designed to work with headers defined as |
| * comma-separated lists. If HTTP_FIND_FL_FULL flag is set, it works on |
| * full-line headers in whose comma is not a delimiter but is part of the |
| * syntax. A special case, if ctx->value is NULL when searching for a new values |
| * of a header, the current header is rescanned. This allows rescanning after a |
| * header deletion. |
| * |
| * The matching method is chosen by checking the flags : |
| * |
| * * HTTP_FIND_FL_MATCH_REG : <pattern> is a regex. header names matching |
| * the regex are evaluated. |
| * * HTTP_FIND_FL_MATCH_STR : <pattern> is a string. The header names equal |
| * to the string are evaluated. |
| * * HTTP_FIND_FL_MATCH_PFX : <pattern> is a string. The header names |
| * starting by the string are evaluated. |
| * * HTTP_FIND_FL_MATCH_SFX : <pattern> is a string. The header names |
| * ending by the string are evaluated. |
| * * HTTP_FIND_FL_MATCH_SUB : <pattern> is a string. The header names |
| * containing the string are evaluated. |
| */ |
| |
| #define HTTP_FIND_FL_MATCH_STR 0x0001 |
| #define HTTP_FIND_FL_MATCH_PFX 0x0002 |
| #define HTTP_FIND_FL_MATCH_SFX 0x0003 |
| #define HTTP_FIND_FL_MATCH_SUB 0x0004 |
| #define HTTP_FIND_FL_MATCH_REG 0x0005 |
| /* 0x0006..0x000f: for other matching methods */ |
| #define HTTP_FIND_FL_MATCH_TYPE 0x000F |
| #define HTTP_FIND_FL_FULL 0x0010 |
| |
| static int __http_find_header(const struct htx *htx, const void *pattern, struct http_hdr_ctx *ctx, int flags) |
| { |
| struct htx_blk *blk = ctx->blk; |
| struct ist n, v; |
| enum htx_blk_type type; |
| |
| if (blk) { |
| char *p; |
| |
| if (!isttest(ctx->value)) |
| goto rescan_hdr; |
| if (flags & HTTP_FIND_FL_FULL) |
| goto next_blk; |
| v = htx_get_blk_value(htx, blk); |
| p = ctx->value.ptr + ctx->value.len + ctx->lws_after; |
| v.len -= (p - v.ptr); |
| v.ptr = p; |
| if (!v.len) |
| goto next_blk; |
| /* Skip comma */ |
| if (*(v.ptr) == ',') { |
| v.ptr++; |
| v.len--; |
| } |
| |
| goto return_hdr; |
| } |
| |
| if (htx_is_empty(htx)) |
| return 0; |
| |
| for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) { |
| rescan_hdr: |
| type = htx_get_blk_type(blk); |
| if (type == HTX_BLK_EOH) |
| break; |
| if (type != HTX_BLK_HDR) |
| continue; |
| |
| if ((flags & HTTP_FIND_FL_MATCH_TYPE) == HTTP_FIND_FL_MATCH_REG) { |
| const struct my_regex *re = pattern; |
| |
| n = htx_get_blk_name(htx, blk); |
| if (!regex_exec2(re, n.ptr, n.len)) |
| goto next_blk; |
| } |
| else { |
| const struct ist name = *(const struct ist *)(pattern); |
| |
| /* If no name was passed, we want any header. So skip the comparison */ |
| if (!istlen(name)) |
| goto match; |
| |
| n = htx_get_blk_name(htx, blk); |
| switch (flags & HTTP_FIND_FL_MATCH_TYPE) { |
| case HTTP_FIND_FL_MATCH_STR: |
| if (!isteqi(n, name)) |
| goto next_blk; |
| break; |
| case HTTP_FIND_FL_MATCH_PFX: |
| if (istlen(n) < istlen(name)) |
| goto next_blk; |
| |
| n = ist2(istptr(n), istlen(name)); |
| if (!isteqi(n, name)) |
| goto next_blk; |
| break; |
| case HTTP_FIND_FL_MATCH_SFX: |
| if (istlen(n) < istlen(name)) |
| goto next_blk; |
| |
| n = ist2(istptr(n) + istlen(n) - istlen(name), istlen(name)); |
| if (!isteqi(n, name)) |
| goto next_blk; |
| break; |
| case HTTP_FIND_FL_MATCH_SUB: |
| if (!strnistr(n.ptr, n.len, name.ptr, name.len)) |
| goto next_blk; |
| break; |
| default: |
| goto next_blk; |
| break; |
| } |
| } |
| match: |
| v = htx_get_blk_value(htx, blk); |
| |
| return_hdr: |
| ctx->lws_before = 0; |
| ctx->lws_after = 0; |
| while (v.len && HTTP_IS_LWS(*v.ptr)) { |
| v.ptr++; |
| v.len--; |
| ctx->lws_before++; |
| } |
| if (!(flags & HTTP_FIND_FL_FULL)) |
| v.len = http_find_hdr_value_end(v.ptr, v.ptr + v.len) - v.ptr; |
| while (v.len && HTTP_IS_LWS(*(v.ptr + v.len - 1))) { |
| v.len--; |
| ctx->lws_after++; |
| } |
| ctx->blk = blk; |
| ctx->value = v; |
| return 1; |
| |
| next_blk: |
| ; |
| } |
| |
| ctx->blk = NULL; |
| ctx->value = ist(""); |
| ctx->lws_before = ctx->lws_after = 0; |
| return 0; |
| } |
| |
| |
| /* Header names must match <name> */ |
| int http_find_header(const struct htx *htx, const struct ist name, struct http_hdr_ctx *ctx, int full) |
| { |
| return __http_find_header(htx, &name, ctx, HTTP_FIND_FL_MATCH_STR | (full ? HTTP_FIND_FL_FULL : 0)); |
| } |
| |
| /* Header names must match <name>. Same than http_find_header */ |
| int http_find_str_header(const struct htx *htx, const struct ist name, struct http_hdr_ctx *ctx, int full) |
| { |
| return __http_find_header(htx, &name, ctx, HTTP_FIND_FL_MATCH_STR | (full ? HTTP_FIND_FL_FULL : 0)); |
| } |
| |
| |
| /* Header names must start with <prefix> */ |
| int http_find_pfx_header(const struct htx *htx, const struct ist prefix, struct http_hdr_ctx *ctx, int full) |
| { |
| return __http_find_header(htx, &prefix, ctx, HTTP_FIND_FL_MATCH_PFX | (full ? HTTP_FIND_FL_FULL : 0)); |
| } |
| |
| /* Header names must end with <suffix> */ |
| int http_find_sfx_header(const struct htx *htx, const struct ist suffix, struct http_hdr_ctx *ctx, int full) |
| { |
| return __http_find_header(htx, &suffix, ctx, HTTP_FIND_FL_MATCH_SFX | (full ? HTTP_FIND_FL_FULL : 0)); |
| } |
| /* Header names must contain <sub> */ |
| int http_find_sub_header(const struct htx *htx, const struct ist sub, struct http_hdr_ctx *ctx, int full) |
| { |
| return __http_find_header(htx, &sub, ctx, HTTP_FIND_FL_MATCH_SUB | (full ? HTTP_FIND_FL_FULL : 0)); |
| } |
| |
| /* Header names must match <re> regex*/ |
| int http_match_header(const struct htx *htx, const struct my_regex *re, struct http_hdr_ctx *ctx, int full) |
| { |
| return __http_find_header(htx, re, ctx, HTTP_FIND_FL_MATCH_REG | (full ? HTTP_FIND_FL_FULL : 0)); |
| } |
| |
| |
| /* Adds a header block int the HTX message <htx>, just before the EOH block. It |
| * returns 1 on success, otherwise it returns 0. |
| */ |
| int http_add_header(struct htx *htx, const struct ist n, const struct ist v) |
| { |
| struct htx_blk *blk; |
| struct htx_sl *sl; |
| enum htx_blk_type type = htx_get_tail_type(htx); |
| int32_t prev; |
| |
| blk = htx_add_header(htx, n, v); |
| if (!blk) |
| goto fail; |
| |
| if (unlikely(type < HTX_BLK_EOH)) |
| goto end; |
| |
| /* <blk> is the head, swap it iteratively with its predecessor to place |
| * it just before the end-of-header block. So blocks remains ordered. */ |
| for (prev = htx_get_prev(htx, htx->tail); prev != htx->first; prev = htx_get_prev(htx, prev)) { |
| struct htx_blk *pblk = htx_get_blk(htx, prev); |
| enum htx_blk_type type = htx_get_blk_type(pblk); |
| |
| /* Swap .addr and .info fields */ |
| blk->addr ^= pblk->addr; pblk->addr ^= blk->addr; blk->addr ^= pblk->addr; |
| blk->info ^= pblk->info; pblk->info ^= blk->info; blk->info ^= pblk->info; |
| |
| if (blk->addr == pblk->addr) |
| blk->addr += htx_get_blksz(pblk); |
| |
| /* Stop when end-of-header is reached */ |
| if (type == HTX_BLK_EOH) |
| break; |
| |
| blk = pblk; |
| } |
| |
| end: |
| sl = http_get_stline(htx); |
| if (sl && (sl->flags & HTX_SL_F_HAS_AUTHORITY) && isteqi(n, ist("host"))) { |
| if (!http_update_authority(htx, sl, v)) |
| goto fail; |
| } |
| return 1; |
| |
| fail: |
| return 0; |
| } |
| |
| /* Replaces parts of the start-line of the HTX message <htx>. It returns 1 on |
| * success, otherwise it returns 0. |
| */ |
| int http_replace_stline(struct htx *htx, const struct ist p1, const struct ist p2, const struct ist p3) |
| { |
| struct htx_blk *blk; |
| |
| blk = htx_get_first_blk(htx); |
| if (!blk || !htx_replace_stline(htx, blk, p1, p2, p3)) |
| return 0; |
| return 1; |
| } |
| |
| /* Replace the request method in the HTX message <htx> by <meth>. It returns 1 |
| * on success, otherwise 0. |
| */ |
| int http_replace_req_meth(struct htx *htx, const struct ist meth) |
| { |
| struct buffer *temp = get_trash_chunk(); |
| struct htx_sl *sl = http_get_stline(htx); |
| struct ist uri, vsn; |
| |
| if (!sl) |
| return 0; |
| |
| /* Start by copying old uri and version */ |
| chunk_memcat(temp, HTX_SL_REQ_UPTR(sl), HTX_SL_REQ_ULEN(sl)); /* uri */ |
| uri = ist2(temp->area, HTX_SL_REQ_ULEN(sl)); |
| |
| chunk_memcat(temp, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl)); /* vsn */ |
| vsn = ist2(temp->area + uri.len, HTX_SL_REQ_VLEN(sl)); |
| |
| /* create the new start line */ |
| sl->info.req.meth = find_http_meth(meth.ptr, meth.len); |
| return http_replace_stline(htx, meth, uri, vsn); |
| } |
| |
| /* Replace the request uri in the HTX message <htx> by <uri>. It returns 1 on |
| * success, otherwise 0. |
| */ |
| int http_replace_req_uri(struct htx *htx, const struct ist uri) |
| { |
| struct buffer *temp = get_trash_chunk(); |
| struct htx_sl *sl = http_get_stline(htx); |
| struct ist meth, vsn; |
| |
| if (!sl) |
| goto fail; |
| |
| /* Start by copying old method and version */ |
| chunk_memcat(temp, HTX_SL_REQ_MPTR(sl), HTX_SL_REQ_MLEN(sl)); /* meth */ |
| meth = ist2(temp->area, HTX_SL_REQ_MLEN(sl)); |
| |
| chunk_memcat(temp, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl)); /* vsn */ |
| vsn = ist2(temp->area + meth.len, HTX_SL_REQ_VLEN(sl)); |
| |
| /* create the new start line */ |
| if (!http_replace_stline(htx, meth, uri, vsn)) |
| goto fail; |
| |
| sl = http_get_stline(htx); |
| if (!http_update_host(htx, sl, uri)) |
| goto fail; |
| |
| return 1; |
| fail: |
| return 0; |
| } |
| |
| /* Replace the request path in the HTX message <htx> by <path>. The host part is |
| * preserverd. if <with_qs> is set, the query string is evaluated as part of the |
| * path and replaced. Otherwise, it is preserved too. It returns 1 on success, |
| * otherwise 0. |
| */ |
| int http_replace_req_path(struct htx *htx, const struct ist path, int with_qs) |
| { |
| struct buffer *temp = get_trash_chunk(); |
| struct htx_sl *sl = http_get_stline(htx); |
| struct ist meth, uri, vsn, p; |
| size_t plen = 0; |
| |
| if (!sl) |
| return 0; |
| |
| uri = htx_sl_req_uri(sl); |
| p = http_get_path(uri); |
| if (!isttest(p)) |
| p = uri; |
| if (with_qs) |
| plen = p.len; |
| else { |
| while (plen < p.len && *(p.ptr + plen) != '?') |
| plen++; |
| } |
| |
| /* Start by copying old method and version and create the new uri */ |
| chunk_memcat(temp, HTX_SL_REQ_MPTR(sl), HTX_SL_REQ_MLEN(sl)); /* meth */ |
| meth = ist2(temp->area, HTX_SL_REQ_MLEN(sl)); |
| |
| chunk_memcat(temp, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl)); /* vsn */ |
| vsn = ist2(temp->area + meth.len, HTX_SL_REQ_VLEN(sl)); |
| |
| chunk_memcat(temp, uri.ptr, p.ptr - uri.ptr); /* uri: host part */ |
| chunk_memcat(temp, path.ptr, path.len); /* uri: new path */ |
| chunk_memcat(temp, p.ptr + plen, p.len - plen); /* uri: QS part */ |
| uri = ist2(temp->area + meth.len + vsn.len, uri.len - plen + path.len); |
| |
| /* create the new start line */ |
| return http_replace_stline(htx, meth, uri, vsn); |
| } |
| |
| /* Replace the request query-string in the HTX message <htx> by <query>. The |
| * host part and the path are preserved. It returns 1 on success, otherwise |
| * 0. |
| */ |
| int http_replace_req_query(struct htx *htx, const struct ist query) |
| { |
| struct buffer *temp = get_trash_chunk(); |
| struct htx_sl *sl = http_get_stline(htx); |
| struct ist meth, uri, vsn, q; |
| int offset = 1; |
| |
| if (!sl) |
| return 0; |
| |
| uri = htx_sl_req_uri(sl); |
| q = uri; |
| while (q.len > 0 && *(q.ptr) != '?') { |
| q.ptr++; |
| q.len--; |
| } |
| |
| /* skip the question mark or indicate that we must insert it |
| * (but only if the format string is not empty then). |
| */ |
| if (q.len) { |
| q.ptr++; |
| q.len--; |
| } |
| else if (query.len > 1) |
| offset = 0; |
| |
| /* Start by copying old method and version and create the new uri */ |
| chunk_memcat(temp, HTX_SL_REQ_MPTR(sl), HTX_SL_REQ_MLEN(sl)); /* meth */ |
| meth = ist2(temp->area, HTX_SL_REQ_MLEN(sl)); |
| |
| chunk_memcat(temp, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl)); /* vsn */ |
| vsn = ist2(temp->area + meth.len, HTX_SL_REQ_VLEN(sl)); |
| |
| chunk_memcat(temp, uri.ptr, q.ptr - uri.ptr); /* uri: host + path part */ |
| chunk_memcat(temp, query.ptr + offset, query.len - offset); /* uri: new QS */ |
| uri = ist2(temp->area + meth.len + vsn.len, uri.len - q.len + query.len - offset); |
| |
| /* create the new start line */ |
| return http_replace_stline(htx, meth, uri, vsn); |
| } |
| |
| /* Replace the response status in the HTX message <htx> by <status>. It returns |
| * 1 on success, otherwise 0. |
| */ |
| int http_replace_res_status(struct htx *htx, const struct ist status, const struct ist reason) |
| { |
| struct buffer *temp = get_trash_chunk(); |
| struct htx_sl *sl = http_get_stline(htx); |
| struct ist vsn, r; |
| |
| if (!sl) |
| return 0; |
| |
| /* Start by copying old uri and version */ |
| chunk_memcat(temp, HTX_SL_RES_VPTR(sl), HTX_SL_RES_VLEN(sl)); /* vsn */ |
| vsn = ist2(temp->area, HTX_SL_RES_VLEN(sl)); |
| r = reason; |
| if (!isttest(r)) { |
| chunk_memcat(temp, HTX_SL_RES_RPTR(sl), HTX_SL_RES_RLEN(sl)); /* reason */ |
| r = ist2(temp->area + vsn.len, HTX_SL_RES_RLEN(sl)); |
| } |
| |
| /* create the new start line */ |
| sl->info.res.status = strl2ui(status.ptr, status.len); |
| return http_replace_stline(htx, vsn, status, r); |
| } |
| |
| /* Replace the response reason in the HTX message <htx> by <reason>. It returns |
| * 1 on success, otherwise 0. |
| */ |
| int http_replace_res_reason(struct htx *htx, const struct ist reason) |
| { |
| struct buffer *temp = get_trash_chunk(); |
| struct htx_sl *sl = http_get_stline(htx); |
| struct ist vsn, status; |
| |
| if (!sl) |
| return 0; |
| |
| /* Start by copying old uri and version */ |
| chunk_memcat(temp, HTX_SL_RES_VPTR(sl), HTX_SL_RES_VLEN(sl)); /* vsn */ |
| vsn = ist2(temp->area, HTX_SL_RES_VLEN(sl)); |
| |
| chunk_memcat(temp, HTX_SL_RES_CPTR(sl), HTX_SL_RES_CLEN(sl)); /* code */ |
| status = ist2(temp->area + vsn.len, HTX_SL_RES_CLEN(sl)); |
| |
| /* create the new start line */ |
| return http_replace_stline(htx, vsn, status, reason); |
| } |
| |
| /* Replaces a part of a header value referenced in the context <ctx> by |
| * <data>. It returns 1 on success, otherwise it returns 0. The context is |
| * updated if necessary. |
| */ |
| int http_replace_header_value(struct htx *htx, struct http_hdr_ctx *ctx, const struct ist data) |
| { |
| struct htx_blk *blk = ctx->blk; |
| struct htx_sl *sl; |
| char *start; |
| struct ist v; |
| uint32_t len, off; |
| |
| if (!blk) |
| goto fail; |
| |
| v = htx_get_blk_value(htx, blk); |
| start = ctx->value.ptr - ctx->lws_before; |
| len = ctx->lws_before + ctx->value.len + ctx->lws_after; |
| off = start - v.ptr; |
| |
| blk = htx_replace_blk_value(htx, blk, ist2(start, len), data); |
| if (!blk) |
| goto fail; |
| |
| v = htx_get_blk_value(htx, blk); |
| |
| sl = http_get_stline(htx); |
| if (sl && (sl->flags & HTX_SL_F_HAS_AUTHORITY)) { |
| struct ist n = htx_get_blk_name(htx, blk); |
| |
| if (isteq(n, ist("host"))) { |
| if (!http_update_authority(htx, sl, v)) |
| goto fail; |
| ctx->blk = NULL; |
| http_find_header(htx, ist("host"), ctx, 1); |
| blk = ctx->blk; |
| v = htx_get_blk_value(htx, blk); |
| } |
| } |
| |
| ctx->blk = blk; |
| ctx->value.ptr = v.ptr + off; |
| ctx->value.len = data.len; |
| ctx->lws_before = ctx->lws_after = 0; |
| |
| return 1; |
| fail: |
| return 0; |
| } |
| |
| /* Fully replaces a header referenced in the context <ctx> by the name <name> |
| * with the value <value>. It returns 1 on success, otherwise it returns 0. The |
| * context is updated if necessary. |
| */ |
| int http_replace_header(struct htx *htx, struct http_hdr_ctx *ctx, |
| const struct ist name, const struct ist value) |
| { |
| struct htx_blk *blk = ctx->blk; |
| struct htx_sl *sl; |
| |
| if (!blk) |
| goto fail; |
| |
| blk = htx_replace_header(htx, blk, name, value); |
| if (!blk) |
| goto fail; |
| |
| sl = http_get_stline(htx); |
| if (sl && (sl->flags & HTX_SL_F_HAS_AUTHORITY) && isteqi(name, ist("host"))) { |
| if (!http_update_authority(htx, sl, value)) |
| goto fail; |
| ctx->blk = NULL; |
| http_find_header(htx, ist("host"), ctx, 1); |
| blk = ctx->blk; |
| } |
| |
| ctx->blk = blk; |
| ctx->value = ist(NULL); |
| ctx->lws_before = ctx->lws_after = 0; |
| |
| return 1; |
| fail: |
| return 0; |
| } |
| |
| /* Remove one value of a header. This only works on a <ctx> returned by |
| * http_find_header function. The value is removed, as well as surrounding commas |
| * if any. If the removed value was alone, the whole header is removed. The |
| * <ctx> is always updated accordingly, as well as the HTX message <htx>. It |
| * returns 1 on success. Otherwise, it returns 0. The <ctx> is always left in a |
| * form that can be handled by http_find_header() to find next occurrence. |
| */ |
| int http_remove_header(struct htx *htx, struct http_hdr_ctx *ctx) |
| { |
| struct htx_blk *blk = ctx->blk; |
| char *start; |
| struct ist v; |
| uint32_t len; |
| |
| if (!blk) |
| return 0; |
| |
| start = ctx->value.ptr - ctx->lws_before; |
| len = ctx->lws_before + ctx->value.len + ctx->lws_after; |
| |
| v = htx_get_blk_value(htx, blk); |
| if (len == v.len) { |
| blk = htx_remove_blk(htx, blk); |
| if (blk || htx_is_empty(htx)) { |
| ctx->blk = blk; |
| ctx->value = IST_NULL; |
| ctx->lws_before = ctx->lws_after = 0; |
| } |
| else { |
| ctx->blk = htx_get_blk(htx, htx->tail); |
| ctx->value = htx_get_blk_value(htx, ctx->blk); |
| ctx->lws_before = ctx->lws_after = 0; |
| } |
| return 1; |
| } |
| |
| /* This was not the only value of this header. We have to remove the |
| * part pointed by ctx->value. If it is the last entry of the list, we |
| * remove the last separator. |
| */ |
| if (start == v.ptr) { |
| /* It's the first header part but not the only one. So remove |
| * the comma after it. */ |
| len++; |
| } |
| else { |
| /* There is at least one header part before the removed one. So |
| * remove the comma between them. */ |
| start--; |
| len++; |
| } |
| /* Update the block content and its len */ |
| memmove(start, start+len, v.len-len); |
| htx_change_blk_value_len(htx, blk, v.len-len); |
| |
| /* Finally update the ctx */ |
| ctx->value.ptr = start; |
| ctx->value.len = 0; |
| ctx->lws_before = ctx->lws_after = 0; |
| |
| return 1; |
| } |
| |
| /* Updates the authority part of the uri with the value <host>. It happens when |
| * the header host is modified. It returns 0 on failure and 1 on success. It is |
| * the caller responsibility to provide the start-line and to be sure the uri |
| * contains an authority. Thus, if no authority is found in the uri, an error is |
| * returned. |
| */ |
| int http_update_authority(struct htx *htx, struct htx_sl *sl, const struct ist host) |
| { |
| struct buffer *temp = get_trash_chunk(); |
| struct ist meth, vsn, uri, authority; |
| |
| uri = htx_sl_req_uri(sl); |
| authority = http_get_authority(uri, 1); |
| if (!authority.len) |
| return 0; |
| |
| /* Don't update the uri if there is no change */ |
| if (isteq(host, authority)) |
| return 1; |
| |
| /* Start by copying old method and version */ |
| chunk_memcat(temp, HTX_SL_REQ_MPTR(sl), HTX_SL_REQ_MLEN(sl)); /* meth */ |
| meth = ist2(temp->area, HTX_SL_REQ_MLEN(sl)); |
| |
| chunk_memcat(temp, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl)); /* vsn */ |
| vsn = ist2(temp->area + meth.len, HTX_SL_REQ_VLEN(sl)); |
| |
| chunk_memcat(temp, uri.ptr, authority.ptr - uri.ptr); |
| chunk_memcat(temp, host.ptr, host.len); |
| chunk_memcat(temp, authority.ptr + authority.len, uri.ptr + uri.len - (authority.ptr + authority.len)); |
| uri = ist2(temp->area + meth.len + vsn.len, host.len + uri.len - authority.len); /* uri */ |
| |
| return http_replace_stline(htx, meth, uri, vsn); |
| |
| } |
| |
| /* Update the header host by extracting the authority of the uri <uri>. flags of |
| * the start-line are also updated accordingly. For orgin-form and asterisk-form |
| * uri, the header host is not changed and the flag HTX_SL_F_HAS_AUTHORITY is |
| * removed from the flags of the start-line. Otherwise, this flag is set and the |
| * authority is used to set the value of the header host. This function returns |
| * 0 on failure and 1 on success. |
| */ |
| int http_update_host(struct htx *htx, struct htx_sl *sl, const struct ist uri) |
| { |
| struct ist authority; |
| struct http_hdr_ctx ctx; |
| |
| if (!uri.len || uri.ptr[0] == '/' || uri.ptr[0] == '*') { |
| // origin-form or a asterisk-form (RFC7320 #5.3.1 and #5.3.4) |
| sl->flags &= ~HTX_SL_F_HAS_AUTHORITY; |
| } |
| else { |
| sl->flags |= HTX_SL_F_HAS_AUTHORITY; |
| if (sl->info.req.meth != HTTP_METH_CONNECT) { |
| // absolute-form (RFC7320 #5.3.2) |
| sl->flags |= HTX_SL_F_HAS_SCHM; |
| if (uri.len > 4 && (uri.ptr[0] | 0x20) == 'h') |
| sl->flags |= ((uri.ptr[4] == ':') ? HTX_SL_F_SCHM_HTTP : HTX_SL_F_SCHM_HTTPS); |
| |
| authority = http_get_authority(uri, 1); |
| if (!authority.len) |
| goto fail; |
| } |
| else { |
| // authority-form (RFC7320 #5.3.3) |
| authority = uri; |
| } |
| |
| /* Replace header host value */ |
| ctx.blk = NULL; |
| while (http_find_header(htx, ist("host"), &ctx, 1)) { |
| if (!http_replace_header_value(htx, &ctx, authority)) |
| goto fail; |
| } |
| |
| } |
| return 1; |
| fail: |
| return 0; |
| } |
| |
| /* Return in <vptr> and <vlen> the pointer and length of occurrence <occ> of |
| * header whose name is <hname> of length <hlen>. If <ctx> is null, lookup is |
| * performed over the whole headers. Otherwise it must contain a valid header |
| * context, initialised with ctx->blk=NULL for the first lookup in a series. If |
| * <occ> is positive or null, occurrence #occ from the beginning (or last ctx) |
| * is returned. Occ #0 and #1 are equivalent. If <occ> is negative (and no less |
| * than -MAX_HDR_HISTORY), the occurrence is counted from the last one which is |
| * -1. The value fetch stops at commas, so this function is suited for use with |
| * list headers. |
| * The return value is 0 if nothing was found, or non-zero otherwise. |
| */ |
| unsigned int http_get_htx_hdr(const struct htx *htx, const struct ist hdr, |
| int occ, struct http_hdr_ctx *ctx, char **vptr, size_t *vlen) |
| { |
| struct http_hdr_ctx local_ctx; |
| struct ist val_hist[MAX_HDR_HISTORY]; |
| unsigned int hist_idx; |
| int found; |
| |
| if (!ctx) { |
| local_ctx.blk = NULL; |
| ctx = &local_ctx; |
| } |
| |
| if (occ >= 0) { |
| /* search from the beginning */ |
| while (http_find_header(htx, hdr, ctx, 0)) { |
| occ--; |
| if (occ <= 0) { |
| *vptr = ctx->value.ptr; |
| *vlen = ctx->value.len; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* negative occurrence, we scan all the list then walk back */ |
| if (-occ > MAX_HDR_HISTORY) |
| return 0; |
| |
| found = hist_idx = 0; |
| while (http_find_header(htx, hdr, ctx, 0)) { |
| val_hist[hist_idx] = ctx->value; |
| if (++hist_idx >= MAX_HDR_HISTORY) |
| hist_idx = 0; |
| found++; |
| } |
| if (-occ > found) |
| return 0; |
| |
| /* OK now we have the last occurrence in [hist_idx-1], and we need to |
| * find occurrence -occ. 0 <= hist_idx < MAX_HDR_HISTORY, and we have |
| * -10 <= occ <= -1. So we have to check [hist_idx%MAX_HDR_HISTORY+occ] |
| * to remain in the 0..9 range. |
| */ |
| hist_idx += occ + MAX_HDR_HISTORY; |
| if (hist_idx >= MAX_HDR_HISTORY) |
| hist_idx -= MAX_HDR_HISTORY; |
| *vptr = val_hist[hist_idx].ptr; |
| *vlen = val_hist[hist_idx].len; |
| return 1; |
| } |
| |
| /* Return in <vptr> and <vlen> the pointer and length of occurrence <occ> of |
| * header whose name is <hname> of length <hlen>. If <ctx> is null, lookup is |
| * performed over the whole headers. Otherwise it must contain a valid header |
| * context, initialised with ctx->blk=NULL for the first lookup in a series. If |
| * <occ> is positive or null, occurrence #occ from the beginning (or last ctx) |
| * is returned. Occ #0 and #1 are equivalent. If <occ> is negative (and no less |
| * than -MAX_HDR_HISTORY), the occurrence is counted from the last one which is |
| * -1. This function differs from http_get_hdr() in that it only returns full |
| * line header values and does not stop at commas. |
| * The return value is 0 if nothing was found, or non-zero otherwise. |
| */ |
| unsigned int http_get_htx_fhdr(const struct htx *htx, const struct ist hdr, |
| int occ, struct http_hdr_ctx *ctx, char **vptr, size_t *vlen) |
| { |
| struct http_hdr_ctx local_ctx; |
| struct ist val_hist[MAX_HDR_HISTORY]; |
| unsigned int hist_idx; |
| int found; |
| |
| if (!ctx) { |
| local_ctx.blk = NULL; |
| ctx = &local_ctx; |
| } |
| |
| if (occ >= 0) { |
| /* search from the beginning */ |
| while (http_find_header(htx, hdr, ctx, 1)) { |
| occ--; |
| if (occ <= 0) { |
| *vptr = ctx->value.ptr; |
| *vlen = ctx->value.len; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* negative occurrence, we scan all the list then walk back */ |
| if (-occ > MAX_HDR_HISTORY) |
| return 0; |
| |
| found = hist_idx = 0; |
| while (http_find_header(htx, hdr, ctx, 1)) { |
| val_hist[hist_idx] = ctx->value; |
| if (++hist_idx >= MAX_HDR_HISTORY) |
| hist_idx = 0; |
| found++; |
| } |
| if (-occ > found) |
| return 0; |
| |
| /* OK now we have the last occurrence in [hist_idx-1], and we need to |
| * find occurrence -occ. 0 <= hist_idx < MAX_HDR_HISTORY, and we have |
| * -10 <= occ <= -1. So we have to check [hist_idx%MAX_HDR_HISTORY+occ] |
| * to remain in the 0..9 range. |
| */ |
| hist_idx += occ + MAX_HDR_HISTORY; |
| if (hist_idx >= MAX_HDR_HISTORY) |
| hist_idx -= MAX_HDR_HISTORY; |
| *vptr = val_hist[hist_idx].ptr; |
| *vlen = val_hist[hist_idx].len; |
| return 1; |
| } |
| |
| int http_str_to_htx(struct buffer *buf, struct ist raw, char **errmsg) |
| { |
| struct htx *htx; |
| struct htx_sl *sl; |
| struct h1m h1m; |
| struct http_hdr hdrs[global.tune.max_http_hdr]; |
| union h1_sl h1sl; |
| unsigned int flags = HTX_SL_F_IS_RESP; |
| int ret = 0; |
| |
| b_reset(buf); |
| if (!raw.len) { |
| buf->size = 0; |
| buf->area = NULL; |
| return 1; |
| } |
| |
| buf->size = global.tune.bufsize; |
| buf->area = malloc(buf->size); |
| if (!buf->area) |
| goto error; |
| |
| h1m_init_res(&h1m); |
| h1m.flags |= H1_MF_NO_PHDR; |
| ret = h1_headers_to_hdr_list(raw.ptr, raw.ptr + raw.len, |
| hdrs, sizeof(hdrs)/sizeof(hdrs[0]), &h1m, &h1sl); |
| if (ret <= 0) { |
| memprintf(errmsg, "unabled to parse headers (error offset: %d)", h1m.err_pos); |
| goto error; |
| } |
| |
| if (unlikely(h1sl.st.v.len != 8)) { |
| memprintf(errmsg, "invalid http version (%.*s)", (int)h1sl.st.v.len, h1sl.st.v.ptr); |
| goto error; |
| } |
| if ((*(h1sl.st.v.ptr + 5) > '1') || |
| ((*(h1sl.st.v.ptr + 5) == '1') && (*(h1sl.st.v.ptr + 7) >= '1'))) |
| h1m.flags |= H1_MF_VER_11; |
| |
| if (h1sl.st.status < 200 && (h1sl.st.status == 100 || h1sl.st.status >= 102)) { |
| memprintf(errmsg, "invalid http status code for an error message (%u)", |
| h1sl.st.status); |
| goto error; |
| } |
| |
| if (h1sl.st.status == 204 || h1sl.st.status == 304) { |
| /* Responses known to have no body. */ |
| h1m.flags &= ~(H1_MF_CLEN|H1_MF_CHNK); |
| h1m.flags |= H1_MF_XFER_LEN; |
| h1m.curr_len = h1m.body_len = 0; |
| } |
| else if (h1m.flags & (H1_MF_CLEN|H1_MF_CHNK)) |
| h1m.flags |= H1_MF_XFER_LEN; |
| |
| if (h1m.flags & H1_MF_VER_11) |
| flags |= HTX_SL_F_VER_11; |
| if (h1m.flags & H1_MF_XFER_ENC) |
| flags |= HTX_SL_F_XFER_ENC; |
| if (h1m.flags & H1_MF_XFER_LEN) { |
| flags |= HTX_SL_F_XFER_LEN; |
| if (h1m.flags & H1_MF_CHNK) { |
| memprintf(errmsg, "chunk-encoded payload not supported"); |
| goto error; |
| } |
| else if (h1m.flags & H1_MF_CLEN) { |
| flags |= HTX_SL_F_CLEN; |
| if (h1m.body_len == 0) |
| flags |= HTX_SL_F_BODYLESS; |
| } |
| else |
| flags |= HTX_SL_F_BODYLESS; |
| } |
| |
| if ((flags & HTX_SL_F_BODYLESS) && raw.len > ret) { |
| memprintf(errmsg, "message payload not expected"); |
| goto error; |
| } |
| if ((flags & HTX_SL_F_CLEN) && h1m.body_len != (raw.len - ret)) { |
| memprintf(errmsg, "payload size does not match the announced content-length (%lu != %lu)", |
| (unsigned long)(raw.len - ret), (unsigned long)h1m.body_len); |
| goto error; |
| } |
| |
| htx = htx_from_buf(buf); |
| sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, h1sl.st.v, h1sl.st.c, h1sl.st.r); |
| if (!sl || !htx_add_all_headers(htx, hdrs)) { |
| memprintf(errmsg, "unable to add headers into the HTX message"); |
| goto error; |
| } |
| sl->info.res.status = h1sl.st.status; |
| |
| while (raw.len > ret) { |
| int sent = htx_add_data(htx, ist2(raw.ptr + ret, raw.len - ret)); |
| if (!sent) { |
| memprintf(errmsg, "unable to add payload into the HTX message"); |
| goto error; |
| } |
| ret += sent; |
| } |
| |
| htx->flags |= HTX_FL_EOM; |
| |
| return 1; |
| |
| error: |
| if (buf->size) |
| free(buf->area); |
| return 0; |
| } |
| |
| void release_http_reply(struct http_reply *http_reply) |
| { |
| struct logformat_node *lf, *lfb; |
| struct http_reply_hdr *hdr, *hdrb; |
| |
| if (!http_reply) |
| return; |
| |
| ha_free(&http_reply->ctype); |
| list_for_each_entry_safe(hdr, hdrb, &http_reply->hdrs, list) { |
| LIST_DELETE(&hdr->list); |
| list_for_each_entry_safe(lf, lfb, &hdr->value, list) { |
| LIST_DELETE(&lf->list); |
| release_sample_expr(lf->expr); |
| free(lf->arg); |
| free(lf); |
| } |
| istfree(&hdr->name); |
| free(hdr); |
| } |
| |
| if (http_reply->type == HTTP_REPLY_ERRFILES) { |
| ha_free(&http_reply->body.http_errors); |
| } |
| else if (http_reply->type == HTTP_REPLY_RAW) |
| chunk_destroy(&http_reply->body.obj); |
| else if (http_reply->type == HTTP_REPLY_LOGFMT) { |
| list_for_each_entry_safe(lf, lfb, &http_reply->body.fmt, list) { |
| LIST_DELETE(&lf->list); |
| release_sample_expr(lf->expr); |
| free(lf->arg); |
| free(lf); |
| } |
| } |
| free(http_reply); |
| } |
| |
| static int http_htx_init(void) |
| { |
| struct buffer chk; |
| struct ist raw; |
| char *errmsg = NULL; |
| int rc; |
| int err_code = 0; |
| |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) { |
| if (!http_err_msgs[rc]) { |
| ha_alert("Internal error: no default message defined for HTTP return code %d", rc); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| continue; |
| } |
| |
| raw = ist2(http_err_msgs[rc], strlen(http_err_msgs[rc])); |
| if (!http_str_to_htx(&chk, raw, &errmsg)) { |
| ha_alert("Internal error: invalid default message for HTTP return code %d: %s.\n", |
| http_err_codes[rc], errmsg); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| } |
| else if (errmsg) { |
| ha_warning("invalid default message for HTTP return code %d: %s.\n", http_err_codes[rc], errmsg); |
| err_code |= ERR_WARN; |
| } |
| |
| /* Reset errmsg */ |
| ha_free(&errmsg); |
| |
| http_err_chunks[rc] = chk; |
| http_err_replies[rc].type = HTTP_REPLY_ERRMSG; |
| http_err_replies[rc].status = http_err_codes[rc]; |
| http_err_replies[rc].ctype = NULL; |
| LIST_INIT(&http_err_replies[rc].hdrs); |
| http_err_replies[rc].body.errmsg = &http_err_chunks[rc]; |
| } |
| end: |
| return err_code; |
| } |
| |
| static void http_htx_deinit(void) |
| { |
| struct http_errors *http_errs, *http_errsb; |
| struct http_reply *http_rep, *http_repb; |
| struct ebpt_node *node, *next; |
| struct http_error_msg *http_errmsg; |
| int rc; |
| |
| node = ebpt_first(&http_error_messages); |
| while (node) { |
| next = ebpt_next(node); |
| ebpt_delete(node); |
| http_errmsg = container_of(node, typeof(*http_errmsg), node); |
| chunk_destroy(&http_errmsg->msg); |
| free(node->key); |
| free(http_errmsg); |
| node = next; |
| } |
| |
| list_for_each_entry_safe(http_errs, http_errsb, &http_errors_list, list) { |
| free(http_errs->conf.file); |
| free(http_errs->id); |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) |
| release_http_reply(http_errs->replies[rc]); |
| LIST_DELETE(&http_errs->list); |
| free(http_errs); |
| } |
| |
| list_for_each_entry_safe(http_rep, http_repb, &http_replies_list, list) { |
| LIST_DELETE(&http_rep->list); |
| release_http_reply(http_rep); |
| } |
| } |
| |
| REGISTER_CONFIG_POSTPARSER("http_htx", http_htx_init); |
| REGISTER_POST_DEINIT(http_htx_deinit); |
| |
| /* Reads content of the error file <file> and convert it into an HTX message. On |
| * success, the HTX message is returned. On error, NULL is returned and an error |
| * message is written into the <errmsg> buffer. |
| */ |
| struct buffer *http_load_errorfile(const char *file, char **errmsg) |
| { |
| struct buffer *buf = NULL; |
| struct buffer chk; |
| struct ebpt_node *node; |
| struct http_error_msg *http_errmsg; |
| struct stat stat; |
| char *err = NULL; |
| int errnum, errlen; |
| int fd = -1; |
| |
| /* already loaded */ |
| node = ebis_lookup_len(&http_error_messages, file, strlen(file)); |
| if (node) { |
| http_errmsg = container_of(node, typeof(*http_errmsg), node); |
| buf = &http_errmsg->msg; |
| goto out; |
| } |
| |
| /* Read the error file content */ |
| fd = open(file, O_RDONLY); |
| if ((fd < 0) || (fstat(fd, &stat) < 0)) { |
| memprintf(errmsg, "error opening file '%s'.", file); |
| goto out; |
| } |
| |
| if (stat.st_size <= global.tune.bufsize) |
| errlen = stat.st_size; |
| else { |
| ha_warning("custom error message file '%s' larger than %d bytes. Truncating.\n", |
| file, global.tune.bufsize); |
| errlen = global.tune.bufsize; |
| } |
| |
| err = malloc(errlen); |
| if (!err) { |
| memprintf(errmsg, "out of memory."); |
| goto out; |
| } |
| |
| errnum = read(fd, err, errlen); |
| if (errnum != errlen) { |
| memprintf(errmsg, "error reading file '%s'.", file); |
| goto out; |
| } |
| |
| /* Create the node corresponding to the error file */ |
| http_errmsg = calloc(1, sizeof(*http_errmsg)); |
| if (!http_errmsg) { |
| memprintf(errmsg, "out of memory."); |
| goto out; |
| } |
| http_errmsg->node.key = strdup(file); |
| if (!http_errmsg->node.key) { |
| memprintf(errmsg, "out of memory."); |
| free(http_errmsg); |
| goto out; |
| } |
| |
| /* Convert the error file into an HTX message */ |
| if (!http_str_to_htx(&chk, ist2(err, errlen), errmsg)) { |
| memprintf(errmsg, "'%s': %s", file, *errmsg); |
| free(http_errmsg->node.key); |
| free(http_errmsg); |
| goto out; |
| } |
| |
| /* Insert the node in the tree and return the HTX message */ |
| http_errmsg->msg = chk; |
| ebis_insert(&http_error_messages, &http_errmsg->node); |
| buf = &http_errmsg->msg; |
| |
| out: |
| if (fd >= 0) |
| close(fd); |
| free(err); |
| return buf; |
| } |
| |
| /* Convert the raw http message <msg> into an HTX message. On success, the HTX |
| * message is returned. On error, NULL is returned and an error message is |
| * written into the <errmsg> buffer. |
| */ |
| struct buffer *http_load_errormsg(const char *key, const struct ist msg, char **errmsg) |
| { |
| struct buffer *buf = NULL; |
| struct buffer chk; |
| struct ebpt_node *node; |
| struct http_error_msg *http_errmsg; |
| |
| /* already loaded */ |
| node = ebis_lookup_len(&http_error_messages, key, strlen(key)); |
| if (node) { |
| http_errmsg = container_of(node, typeof(*http_errmsg), node); |
| buf = &http_errmsg->msg; |
| goto out; |
| } |
| /* Create the node corresponding to the error file */ |
| http_errmsg = calloc(1, sizeof(*http_errmsg)); |
| if (!http_errmsg) { |
| memprintf(errmsg, "out of memory."); |
| goto out; |
| } |
| http_errmsg->node.key = strdup(key); |
| if (!http_errmsg->node.key) { |
| memprintf(errmsg, "out of memory."); |
| free(http_errmsg); |
| goto out; |
| } |
| |
| /* Convert the error file into an HTX message */ |
| if (!http_str_to_htx(&chk, msg, errmsg)) { |
| memprintf(errmsg, "invalid error message: %s", *errmsg); |
| free(http_errmsg->node.key); |
| free(http_errmsg); |
| goto out; |
| } |
| |
| /* Insert the node in the tree and return the HTX message */ |
| http_errmsg->msg = chk; |
| ebis_insert(&http_error_messages, &http_errmsg->node); |
| buf = &http_errmsg->msg; |
| out: |
| return buf; |
| } |
| |
| /* This function parses the raw HTTP error file <file> for the status code |
| * <status>. It returns NULL if there is any error, otherwise it return the |
| * corresponding HTX message. |
| */ |
| struct buffer *http_parse_errorfile(int status, const char *file, char **errmsg) |
| { |
| struct buffer *buf = NULL; |
| int rc; |
| |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) { |
| if (http_err_codes[rc] == status) { |
| buf = http_load_errorfile(file, errmsg); |
| break; |
| } |
| } |
| |
| if (rc >= HTTP_ERR_SIZE) |
| memprintf(errmsg, "status code '%d' not handled.", status); |
| return buf; |
| } |
| |
| /* This function creates HTX error message corresponding to a redirect message |
| * for the status code <status>. <url> is used as location url for the |
| * redirect. <errloc> is used to know if it is a 302 or a 303 redirect. It |
| * returns NULL if there is any error, otherwise it return the corresponding HTX |
| * message. |
| */ |
| struct buffer *http_parse_errorloc(int errloc, int status, const char *url, char **errmsg) |
| { |
| static const char *HTTP_302 = |
| "HTTP/1.1 302 Found\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Content-length: 0\r\n" |
| "Location: "; /* not terminated since it will be concatenated with the URL */ |
| static const char *HTTP_303 = |
| "HTTP/1.1 303 See Other\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Content-length: 0\r\n" |
| "Location: "; /* not terminated since it will be concatenated with the URL */ |
| |
| struct buffer *buf = NULL; |
| const char *msg; |
| char *key = NULL, *err = NULL; |
| int rc, errlen; |
| |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) { |
| if (http_err_codes[rc] == status) { |
| /* Create the error key */ |
| if (!memprintf(&key, "errorloc%d %s", errloc, url)) { |
| memprintf(errmsg, "out of memory."); |
| goto out; |
| } |
| /* Create the error message */ |
| msg = (errloc == 302 ? HTTP_302 : HTTP_303); |
| errlen = strlen(msg) + strlen(url) + 5; |
| err = malloc(errlen); |
| if (!err) { |
| memprintf(errmsg, "out of memory."); |
| goto out; |
| } |
| errlen = snprintf(err, errlen, "%s%s\r\n\r\n", msg, url); |
| |
| /* Load it */ |
| buf = http_load_errormsg(key, ist2(err, errlen), errmsg); |
| break; |
| } |
| } |
| |
| if (rc >= HTTP_ERR_SIZE) |
| memprintf(errmsg, "status code '%d' not handled.", status); |
| out: |
| free(key); |
| free(err); |
| return buf; |
| } |
| |
| /* Check an "http reply" and, for replies referencing an http-errors section, |
| * try to find the right section and the right error message in this section. If |
| * found, the reply is updated. If the http-errors section exists but the error |
| * message is not found, no error message is set to fallback on the default |
| * ones. Otherwise (unknown section) an error is returned. |
| * |
| * The function returns 1 in success case, otherwise, it returns 0 and errmsg is |
| * filled. |
| */ |
| int http_check_http_reply(struct http_reply *reply, struct proxy *px, char **errmsg) |
| { |
| struct http_errors *http_errs; |
| int ret = 1; |
| |
| if (reply->type != HTTP_REPLY_ERRFILES) |
| goto end; |
| |
| list_for_each_entry(http_errs, &http_errors_list, list) { |
| if (strcmp(http_errs->id, reply->body.http_errors) == 0) { |
| reply->type = HTTP_REPLY_INDIRECT; |
| free(reply->body.http_errors); |
| reply->body.reply = http_errs->replies[http_get_status_idx(reply->status)]; |
| if (!reply->body.reply) |
| ha_warning("Proxy '%s': status '%d' referenced by an http reply " |
| "not declared in http-errors section '%s'.\n", |
| px->id, reply->status, http_errs->id); |
| break; |
| } |
| } |
| |
| if (&http_errs->list == &http_errors_list) { |
| memprintf(errmsg, "unknown http-errors section '%s' referenced by an http reply ", |
| reply->body.http_errors); |
| ret = 0; |
| } |
| |
| end: |
| return ret; |
| } |
| |
| /* Parse an "http reply". It returns the reply on success or NULL on error. This |
| * function creates one of the following http replies : |
| * |
| * - HTTP_REPLY_EMPTY : dummy response, no payload |
| * - HTTP_REPLY_ERRMSG : implicit error message depending on the status code or explicit one |
| * - HTTP_REPLY_ERRFILES : points on an http-errors section (resolved during post-parsing) |
| * - HTTP_REPLY_RAW : explicit file object ('file' argument) |
| * - HTTP_REPLY_LOGFMT : explicit log-format string ('content' argument) |
| * |
| * The content-type must be defined for non-empty payload. It is ignored for |
| * error messages (implicit or explicit). When an http-errors section is |
| * referenced (HTTP_REPLY_ERRFILES), the real error message should be resolved |
| * during the configuration validity check or dynamically. It is the caller |
| * responsibility to choose. If no status code is configured, <default_status> |
| * is set. |
| */ |
| struct http_reply *http_parse_http_reply(const char **args, int *orig_arg, struct proxy *px, |
| int default_status, char **errmsg) |
| { |
| struct logformat_node *lf, *lfb; |
| struct http_reply *reply = NULL; |
| struct http_reply_hdr *hdr, *hdrb; |
| struct stat stat; |
| const char *act_arg = NULL; |
| char *obj = NULL; |
| int cur_arg, cap = 0, objlen = 0, fd = -1; |
| |
| |
| reply = calloc(1, sizeof(*reply)); |
| if (!reply) { |
| memprintf(errmsg, "out of memory"); |
| goto error; |
| } |
| LIST_INIT(&reply->hdrs); |
| reply->type = HTTP_REPLY_EMPTY; |
| reply->status = default_status; |
| |
| if (px->conf.args.ctx == ARGC_HERR) |
| cap = (SMP_VAL_REQUEST | SMP_VAL_RESPONSE); |
| else { |
| if (px->cap & PR_CAP_FE) |
| cap |= ((px->conf.args.ctx == ARGC_HRQ) ? SMP_VAL_FE_HRQ_HDR : SMP_VAL_FE_HRS_HDR); |
| if (px->cap & PR_CAP_BE) |
| cap |= ((px->conf.args.ctx == ARGC_HRQ) ? SMP_VAL_BE_HRQ_HDR : SMP_VAL_BE_HRS_HDR); |
| } |
| |
| cur_arg = *orig_arg; |
| while (*args[cur_arg]) { |
| if (strcmp(args[cur_arg], "status") == 0) { |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <status_code> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| reply->status = atol(args[cur_arg]); |
| if (reply->status < 200 || reply->status > 599) { |
| memprintf(errmsg, "Unexpected status code '%d'", reply->status); |
| goto error; |
| } |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "content-type") == 0) { |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <ctype> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| free(reply->ctype); |
| reply->ctype = strdup(args[cur_arg]); |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "errorfiles") == 0) { |
| if (reply->type != HTTP_REPLY_EMPTY) { |
| memprintf(errmsg, "unexpected '%s' argument, '%s' already defined", args[cur_arg], act_arg); |
| goto error; |
| } |
| act_arg = args[cur_arg]; |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <name> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| reply->body.http_errors = strdup(args[cur_arg]); |
| if (!reply->body.http_errors) { |
| memprintf(errmsg, "out of memory"); |
| goto error; |
| } |
| reply->type = HTTP_REPLY_ERRFILES; |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "default-errorfiles") == 0) { |
| if (reply->type != HTTP_REPLY_EMPTY) { |
| memprintf(errmsg, "unexpected '%s' argument, '%s' already defined", args[cur_arg], act_arg); |
| goto error; |
| } |
| act_arg = args[cur_arg]; |
| reply->type = HTTP_REPLY_ERRMSG; |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "errorfile") == 0) { |
| if (reply->type != HTTP_REPLY_EMPTY) { |
| memprintf(errmsg, "unexpected '%s' argument, '%s' already defined", args[cur_arg], act_arg); |
| goto error; |
| } |
| act_arg = args[cur_arg]; |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <fmt> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| reply->body.errmsg = http_load_errorfile(args[cur_arg], errmsg); |
| if (!reply->body.errmsg) { |
| goto error; |
| } |
| reply->type = HTTP_REPLY_ERRMSG; |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "file") == 0) { |
| if (reply->type != HTTP_REPLY_EMPTY) { |
| memprintf(errmsg, "unexpected '%s' argument, '%s' already defined", args[cur_arg], act_arg); |
| goto error; |
| } |
| act_arg = args[cur_arg]; |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <file> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| fd = open(args[cur_arg], O_RDONLY); |
| if ((fd < 0) || (fstat(fd, &stat) < 0)) { |
| memprintf(errmsg, "error opening file '%s'", args[cur_arg]); |
| goto error; |
| } |
| if (stat.st_size > global.tune.bufsize) { |
| memprintf(errmsg, "file '%s' exceeds the buffer size (%lld > %d)", |
| args[cur_arg], (long long)stat.st_size, global.tune.bufsize); |
| goto error; |
| } |
| objlen = stat.st_size; |
| obj = malloc(objlen); |
| if (!obj || read(fd, obj, objlen) != objlen) { |
| memprintf(errmsg, "error reading file '%s'", args[cur_arg]); |
| goto error; |
| } |
| close(fd); |
| fd = -1; |
| reply->type = HTTP_REPLY_RAW; |
| chunk_initlen(&reply->body.obj, obj, global.tune.bufsize, objlen); |
| obj = NULL; |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "string") == 0) { |
| if (reply->type != HTTP_REPLY_EMPTY) { |
| memprintf(errmsg, "unexpected '%s' argument, '%s' already defined", args[cur_arg], act_arg); |
| goto error; |
| } |
| act_arg = args[cur_arg]; |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <str> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| obj = strdup(args[cur_arg]); |
| objlen = strlen(args[cur_arg]); |
| if (!obj) { |
| memprintf(errmsg, "out of memory"); |
| goto error; |
| } |
| reply->type = HTTP_REPLY_RAW; |
| chunk_initlen(&reply->body.obj, obj, global.tune.bufsize, objlen); |
| obj = NULL; |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "lf-file") == 0) { |
| if (reply->type != HTTP_REPLY_EMPTY) { |
| memprintf(errmsg, "unexpected '%s' argument, '%s' already defined", args[cur_arg], act_arg); |
| goto error; |
| } |
| act_arg = args[cur_arg]; |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <file> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| fd = open(args[cur_arg], O_RDONLY); |
| if ((fd < 0) || (fstat(fd, &stat) < 0)) { |
| memprintf(errmsg, "error opening file '%s'", args[cur_arg]); |
| goto error; |
| } |
| if (stat.st_size > global.tune.bufsize) { |
| memprintf(errmsg, "file '%s' exceeds the buffer size (%lld > %d)", |
| args[cur_arg], (long long)stat.st_size, global.tune.bufsize); |
| goto error; |
| } |
| objlen = stat.st_size; |
| obj = malloc(objlen + 1); |
| if (!obj || read(fd, obj, objlen) != objlen) { |
| memprintf(errmsg, "error reading file '%s'", args[cur_arg]); |
| goto error; |
| } |
| close(fd); |
| fd = -1; |
| obj[objlen] = '\0'; |
| reply->type = HTTP_REPLY_LOGFMT; |
| LIST_INIT(&reply->body.fmt); |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "lf-string") == 0) { |
| if (reply->type != HTTP_REPLY_EMPTY) { |
| memprintf(errmsg, "unexpected '%s' argument, '%s' already defined", args[cur_arg], act_arg); |
| goto error; |
| } |
| act_arg = args[cur_arg]; |
| cur_arg++; |
| if (!*args[cur_arg]) { |
| memprintf(errmsg, "'%s' expects <fmt> as argument", args[cur_arg-1]); |
| goto error; |
| } |
| obj = strdup(args[cur_arg]); |
| objlen = strlen(args[cur_arg]); |
| reply->type = HTTP_REPLY_LOGFMT; |
| LIST_INIT(&reply->body.fmt); |
| cur_arg++; |
| } |
| else if (strcmp(args[cur_arg], "hdr") == 0) { |
| cur_arg++; |
| if (!*args[cur_arg] || !*args[cur_arg+1]) { |
| memprintf(errmsg, "'%s' expects <name> and <value> as arguments", args[cur_arg-1]); |
| goto error; |
| } |
| if (strcasecmp(args[cur_arg], "content-length") == 0 || |
| strcasecmp(args[cur_arg], "transfer-encoding") == 0 || |
| strcasecmp(args[cur_arg], "content-type") == 0) { |
| ha_warning("parsing [%s:%d] : header '%s' always ignored by the http reply.\n", |
| px->conf.args.file, px->conf.args.line, args[cur_arg]); |
| cur_arg += 2; |
| continue; |
| } |
| hdr = calloc(1, sizeof(*hdr)); |
| if (!hdr) { |
| memprintf(errmsg, "'%s' : out of memory", args[cur_arg-1]); |
| goto error; |
| } |
| LIST_APPEND(&reply->hdrs, &hdr->list); |
| LIST_INIT(&hdr->value); |
| hdr->name = ist(strdup(args[cur_arg])); |
| if (!isttest(hdr->name)) { |
| memprintf(errmsg, "out of memory"); |
| goto error; |
| } |
| if (!parse_logformat_string(args[cur_arg+1], px, &hdr->value, LOG_OPT_HTTP, cap, errmsg)) |
| goto error; |
| |
| free(px->conf.lfs_file); |
| px->conf.lfs_file = strdup(px->conf.args.file); |
| px->conf.lfs_line = px->conf.args.line; |
| cur_arg += 2; |
| } |
| else |
| break; |
| } |
| |
| if (reply->type == HTTP_REPLY_EMPTY) { /* no payload */ |
| if (reply->ctype) { |
| ha_warning("parsing [%s:%d] : content-type '%s' ignored by the http reply because" |
| " neither errorfile nor payload defined.\n", |
| px->conf.args.file, px->conf.args.line, reply->ctype); |
| ha_free(&reply->ctype); |
| } |
| } |
| else if (reply->type == HTTP_REPLY_ERRFILES || reply->type == HTTP_REPLY_ERRMSG) { /* errorfiles or errorfile */ |
| |
| if (reply->type != HTTP_REPLY_ERRMSG || !reply->body.errmsg) { |
| /* default errorfile or errorfiles: check the status */ |
| int rc; |
| |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) { |
| if (http_err_codes[rc] == reply->status) |
| break; |
| } |
| |
| if (rc >= HTTP_ERR_SIZE) { |
| memprintf(errmsg, "status code '%d' not handled by default with '%s' argument.", |
| reply->status, act_arg); |
| goto error; |
| } |
| } |
| |
| if (reply->ctype) { |
| ha_warning("parsing [%s:%d] : content-type '%s' ignored by the http reply when used " |
| "with an erorrfile.\n", |
| px->conf.args.file, px->conf.args.line, reply->ctype); |
| ha_free(&reply->ctype); |
| } |
| if (!LIST_ISEMPTY(&reply->hdrs)) { |
| ha_warning("parsing [%s:%d] : hdr parameters ignored by the http reply when used " |
| "with an erorrfile.\n", |
| px->conf.args.file, px->conf.args.line); |
| list_for_each_entry_safe(hdr, hdrb, &reply->hdrs, list) { |
| LIST_DELETE(&hdr->list); |
| list_for_each_entry_safe(lf, lfb, &hdr->value, list) { |
| LIST_DELETE(&lf->list); |
| release_sample_expr(lf->expr); |
| free(lf->arg); |
| free(lf); |
| } |
| istfree(&hdr->name); |
| free(hdr); |
| } |
| } |
| } |
| else if (reply->type == HTTP_REPLY_RAW) { /* explicit parameter using 'file' parameter*/ |
| if ((reply->status == 204 || reply->status == 304) && objlen) { |
| memprintf(errmsg, "No body expected for %d responses", reply->status); |
| goto error; |
| } |
| if (!reply->ctype && objlen) { |
| memprintf(errmsg, "a content type must be defined when non-empty payload is configured"); |
| goto error; |
| } |
| if (reply->ctype && !b_data(&reply->body.obj)) { |
| ha_warning("parsing [%s:%d] : content-type '%s' ignored by the http reply when used " |
| "with an empty payload.\n", |
| px->conf.args.file, px->conf.args.line, reply->ctype); |
| ha_free(&reply->ctype); |
| } |
| if (b_room(&reply->body.obj) < global.tune.maxrewrite) { |
| ha_warning("parsing [%s:%d] : http reply payload runs over the buffer space reserved to headers rewriting." |
| " It may lead to internal errors if strict rewriting mode is enabled.\n", |
| px->conf.args.file, px->conf.args.line); |
| } |
| } |
| else if (reply->type == HTTP_REPLY_LOGFMT) { /* log-format payload using 'lf-file' of 'lf-string' parameter */ |
| LIST_INIT(&reply->body.fmt); |
| if ((reply->status == 204 || reply->status == 304)) { |
| memprintf(errmsg, "No body expected for %d responses", reply->status); |
| goto error; |
| } |
| if (!reply->ctype) { |
| memprintf(errmsg, "a content type must be defined with a log-format payload"); |
| goto error; |
| } |
| if (!parse_logformat_string(obj, px, &reply->body.fmt, LOG_OPT_HTTP, cap, errmsg)) |
| goto error; |
| |
| free(px->conf.lfs_file); |
| px->conf.lfs_file = strdup(px->conf.args.file); |
| px->conf.lfs_line = px->conf.args.line; |
| } |
| |
| free(obj); |
| *orig_arg = cur_arg; |
| return reply; |
| |
| error: |
| free(obj); |
| if (fd >= 0) |
| close(fd); |
| release_http_reply(reply); |
| return NULL; |
| } |
| |
| /* Apply schemed-based normalization as described on rfc3986 on section 6.3.2. |
| * Returns 0 if no error has been found else non-zero. |
| * |
| * The normalization is processed on the target-uri at the condition that it is |
| * in absolute-form. In the case where the target-uri was normalized, every |
| * host headers values found are also replaced by the normalized hostname. This |
| * assumes that the target-uri and host headers were properly identify as |
| * similar before calling this function. |
| */ |
| int http_scheme_based_normalize(struct htx *htx) |
| { |
| struct http_hdr_ctx ctx; |
| struct htx_sl *sl; |
| struct ist uri, scheme, authority, host, port; |
| |
| sl = http_get_stline(htx); |
| |
| if (!sl || !(sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_HAS_AUTHORITY))) |
| return 0; |
| |
| uri = htx_sl_req_uri(sl); |
| |
| scheme = http_get_scheme(uri); |
| /* if no scheme found, no normalization to proceed */ |
| if (!isttest(scheme)) |
| return 0; |
| |
| /* Extract the port if present in authority */ |
| authority = http_get_authority(uri, 1); |
| port = http_get_host_port(authority); |
| if (!isttest(port)) { |
| /* if no port found, no normalization to proceed */ |
| return 0; |
| } |
| host = isttrim(authority, istlen(authority) - istlen(port) - 1); |
| |
| if (istlen(port) && http_is_default_port(scheme, port)) { |
| /* reconstruct the uri with removal of the port */ |
| struct buffer *temp = get_trash_chunk(); |
| struct ist meth, vsn; |
| |
| /* meth */ |
| chunk_memcat(temp, HTX_SL_REQ_MPTR(sl), HTX_SL_REQ_MLEN(sl)); |
| meth = ist2(temp->area, HTX_SL_REQ_MLEN(sl)); |
| |
| /* vsn */ |
| chunk_memcat(temp, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl)); |
| vsn = ist2(temp->area + meth.len, HTX_SL_REQ_VLEN(sl)); |
| |
| /* reconstruct uri without port */ |
| chunk_memcat(temp, uri.ptr, authority.ptr - uri.ptr); |
| chunk_istcat(temp, host); |
| chunk_memcat(temp, istend(authority), istend(uri) - istend(authority)); |
| uri = ist2(temp->area + meth.len + vsn.len, host.len + uri.len - authority.len); /* uri */ |
| |
| http_replace_stline(htx, meth, uri, vsn); |
| |
| /* replace every host headers values by the normalized host */ |
| ctx.blk = NULL; |
| while (http_find_header(htx, ist("host"), &ctx, 0)) { |
| if (!http_replace_header_value(htx, &ctx, host)) |
| goto fail; |
| } |
| } |
| |
| return 0; |
| |
| fail: |
| return 1; |
| } |
| |
| /* Parses the "errorloc[302|303]" proxy keyword */ |
| static int proxy_parse_errorloc(char **args, int section, struct proxy *curpx, |
| const struct proxy *defpx, const char *file, int line, |
| char **errmsg) |
| { |
| struct conf_errors *conf_err; |
| struct http_reply *reply; |
| struct buffer *msg; |
| int errloc, status; |
| int ret = 0; |
| |
| if (warnifnotcap(curpx, PR_CAP_FE | PR_CAP_BE, file, line, args[0], NULL)) { |
| ret = 1; |
| goto out; |
| } |
| |
| if (*(args[1]) == 0 || *(args[2]) == 0) { |
| memprintf(errmsg, "%s : expects <status_code> and <url> as arguments.\n", args[0]); |
| ret = -1; |
| goto out; |
| } |
| |
| status = atol(args[1]); |
| errloc = (strcmp(args[0], "errorloc303") == 0 ? 303 : 302); |
| msg = http_parse_errorloc(errloc, status, args[2], errmsg); |
| if (!msg) { |
| memprintf(errmsg, "%s : %s", args[0], *errmsg); |
| ret = -1; |
| goto out; |
| } |
| |
| reply = calloc(1, sizeof(*reply)); |
| if (!reply) { |
| memprintf(errmsg, "%s : out of memory.", args[0]); |
| ret = -1; |
| goto out; |
| } |
| reply->type = HTTP_REPLY_ERRMSG; |
| reply->status = status; |
| reply->ctype = NULL; |
| LIST_INIT(&reply->hdrs); |
| reply->body.errmsg = msg; |
| LIST_APPEND(&http_replies_list, &reply->list); |
| |
| conf_err = calloc(1, sizeof(*conf_err)); |
| if (!conf_err) { |
| memprintf(errmsg, "%s : out of memory.", args[0]); |
| free(reply); |
| ret = -1; |
| goto out; |
| } |
| conf_err->type = 1; |
| conf_err->info.errorfile.status = status; |
| conf_err->info.errorfile.reply = reply; |
| |
| conf_err->file = strdup(file); |
| conf_err->line = line; |
| LIST_APPEND(&curpx->conf.errors, &conf_err->list); |
| |
| /* handle warning message */ |
| if (*errmsg) |
| ret = 1; |
| out: |
| return ret; |
| |
| } |
| |
| /* Parses the "errorfile" proxy keyword */ |
| static int proxy_parse_errorfile(char **args, int section, struct proxy *curpx, |
| const struct proxy *defpx, const char *file, int line, |
| char **errmsg) |
| { |
| struct conf_errors *conf_err; |
| struct http_reply *reply; |
| struct buffer *msg; |
| int status; |
| int ret = 0; |
| |
| if (warnifnotcap(curpx, PR_CAP_FE | PR_CAP_BE, file, line, args[0], NULL)) { |
| ret = 1; |
| goto out; |
| } |
| |
| if (*(args[1]) == 0 || *(args[2]) == 0) { |
| memprintf(errmsg, "%s : expects <status_code> and <file> as arguments.\n", args[0]); |
| ret = -1; |
| goto out; |
| } |
| |
| status = atol(args[1]); |
| msg = http_parse_errorfile(status, args[2], errmsg); |
| if (!msg) { |
| memprintf(errmsg, "%s : %s", args[0], *errmsg); |
| ret = -1; |
| goto out; |
| } |
| |
| reply = calloc(1, sizeof(*reply)); |
| if (!reply) { |
| memprintf(errmsg, "%s : out of memory.", args[0]); |
| ret = -1; |
| goto out; |
| } |
| reply->type = HTTP_REPLY_ERRMSG; |
| reply->status = status; |
| reply->ctype = NULL; |
| LIST_INIT(&reply->hdrs); |
| reply->body.errmsg = msg; |
| LIST_APPEND(&http_replies_list, &reply->list); |
| |
| conf_err = calloc(1, sizeof(*conf_err)); |
| if (!conf_err) { |
| memprintf(errmsg, "%s : out of memory.", args[0]); |
| free(reply); |
| ret = -1; |
| goto out; |
| } |
| conf_err->type = 1; |
| conf_err->info.errorfile.status = status; |
| conf_err->info.errorfile.reply = reply; |
| conf_err->file = strdup(file); |
| conf_err->line = line; |
| LIST_APPEND(&curpx->conf.errors, &conf_err->list); |
| |
| /* handle warning message */ |
| if (*errmsg) |
| ret = 1; |
| out: |
| return ret; |
| |
| } |
| |
| /* Parses the "errorfiles" proxy keyword */ |
| static int proxy_parse_errorfiles(char **args, int section, struct proxy *curpx, |
| const struct proxy *defpx, const char *file, int line, |
| char **err) |
| { |
| struct conf_errors *conf_err = NULL; |
| char *name = NULL; |
| int rc, ret = 0; |
| |
| if (warnifnotcap(curpx, PR_CAP_FE | PR_CAP_BE, file, line, args[0], NULL)) { |
| ret = 1; |
| goto out; |
| } |
| |
| if (!*(args[1])) { |
| memprintf(err, "%s : expects <name> as argument.", args[0]); |
| ret = -1; |
| goto out; |
| } |
| |
| name = strdup(args[1]); |
| conf_err = calloc(1, sizeof(*conf_err)); |
| if (!name || !conf_err) { |
| memprintf(err, "%s : out of memory.", args[0]); |
| goto error; |
| } |
| conf_err->type = 0; |
| |
| conf_err->info.errorfiles.name = name; |
| if (!*(args[2])) { |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) |
| conf_err->info.errorfiles.status[rc] = 1; |
| } |
| else { |
| int cur_arg, status; |
| for (cur_arg = 2; *(args[cur_arg]); cur_arg++) { |
| status = atol(args[cur_arg]); |
| |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) { |
| if (http_err_codes[rc] == status) { |
| conf_err->info.errorfiles.status[rc] = 2; |
| break; |
| } |
| } |
| if (rc >= HTTP_ERR_SIZE) { |
| memprintf(err, "%s : status code '%d' not handled.", args[0], status); |
| goto error; |
| } |
| } |
| } |
| conf_err->file = strdup(file); |
| conf_err->line = line; |
| LIST_APPEND(&curpx->conf.errors, &conf_err->list); |
| out: |
| return ret; |
| |
| error: |
| free(name); |
| free(conf_err); |
| ret = -1; |
| goto out; |
| } |
| |
| /* Parses the "http-error" proxy keyword */ |
| static int proxy_parse_http_error(char **args, int section, struct proxy *curpx, |
| const struct proxy *defpx, const char *file, int line, |
| char **errmsg) |
| { |
| struct conf_errors *conf_err; |
| struct http_reply *reply = NULL; |
| int rc, cur_arg, ret = 0; |
| |
| if (warnifnotcap(curpx, PR_CAP_FE | PR_CAP_BE, file, line, args[0], NULL)) { |
| ret = 1; |
| goto out; |
| } |
| |
| cur_arg = 1; |
| curpx->conf.args.ctx = ARGC_HERR; |
| reply = http_parse_http_reply((const char **)args, &cur_arg, curpx, 0, errmsg); |
| if (!reply) { |
| memprintf(errmsg, "%s : %s", args[0], *errmsg); |
| goto error; |
| } |
| else if (!reply->status) { |
| memprintf(errmsg, "%s : expects at least a <status> as arguments.\n", args[0]); |
| goto error; |
| } |
| |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) { |
| if (http_err_codes[rc] == reply->status) |
| break; |
| } |
| |
| if (rc >= HTTP_ERR_SIZE) { |
| memprintf(errmsg, "%s: status code '%d' not handled.", args[0], reply->status); |
| goto error; |
| } |
| if (*args[cur_arg]) { |
| memprintf(errmsg, "%s : unknown keyword '%s'.", args[0], args[cur_arg]); |
| goto error; |
| } |
| |
| conf_err = calloc(1, sizeof(*conf_err)); |
| if (!conf_err) { |
| memprintf(errmsg, "%s : out of memory.", args[0]); |
| goto error; |
| } |
| if (reply->type == HTTP_REPLY_ERRFILES) { |
| int rc = http_get_status_idx(reply->status); |
| |
| conf_err->type = 2; |
| conf_err->info.errorfiles.name = reply->body.http_errors; |
| conf_err->info.errorfiles.status[rc] = 2; |
| reply->body.http_errors = NULL; |
| release_http_reply(reply); |
| } |
| else { |
| conf_err->type = 1; |
| conf_err->info.errorfile.status = reply->status; |
| conf_err->info.errorfile.reply = reply; |
| LIST_APPEND(&http_replies_list, &reply->list); |
| } |
| conf_err->file = strdup(file); |
| conf_err->line = line; |
| LIST_APPEND(&curpx->conf.errors, &conf_err->list); |
| |
| /* handle warning message */ |
| if (*errmsg) |
| ret = 1; |
| out: |
| return ret; |
| |
| error: |
| release_http_reply(reply); |
| ret = -1; |
| goto out; |
| |
| } |
| |
| /* Check "errorfiles" proxy keyword */ |
| static int proxy_check_errors(struct proxy *px) |
| { |
| struct conf_errors *conf_err, *conf_err_back; |
| struct http_errors *http_errs; |
| int rc, err = ERR_NONE; |
| |
| list_for_each_entry_safe(conf_err, conf_err_back, &px->conf.errors, list) { |
| if (conf_err->type == 1) { |
| /* errorfile */ |
| rc = http_get_status_idx(conf_err->info.errorfile.status); |
| px->replies[rc] = conf_err->info.errorfile.reply; |
| |
| /* For proxy, to rely on default replies, just don't reference a reply */ |
| if (px->replies[rc]->type == HTTP_REPLY_ERRMSG && !px->replies[rc]->body.errmsg) |
| px->replies[rc] = NULL; |
| } |
| else { |
| /* errorfiles */ |
| list_for_each_entry(http_errs, &http_errors_list, list) { |
| if (strcmp(http_errs->id, conf_err->info.errorfiles.name) == 0) |
| break; |
| } |
| |
| /* unknown http-errors section */ |
| if (&http_errs->list == &http_errors_list) { |
| ha_alert("config : proxy '%s': unknown http-errors section '%s' (at %s:%d).\n", |
| px->id, conf_err->info.errorfiles.name, conf_err->file, conf_err->line); |
| err |= ERR_ALERT | ERR_FATAL; |
| free(conf_err->info.errorfiles.name); |
| goto next; |
| } |
| |
| free(conf_err->info.errorfiles.name); |
| for (rc = 0; rc < HTTP_ERR_SIZE; rc++) { |
| if (conf_err->info.errorfiles.status[rc] > 0) { |
| if (http_errs->replies[rc]) |
| px->replies[rc] = http_errs->replies[rc]; |
| else if (conf_err->info.errorfiles.status[rc] == 2) |
| ha_warning("config: proxy '%s' : status '%d' not declared in" |
| " http-errors section '%s' (at %s:%d).\n", |
| px->id, http_err_codes[rc], http_errs->id, |
| conf_err->file, conf_err->line); |
| } |
| } |
| } |
| next: |
| LIST_DELETE(&conf_err->list); |
| free(conf_err->file); |
| free(conf_err); |
| } |
| |
| out: |
| return err; |
| } |
| |
| static int post_check_errors() |
| { |
| struct ebpt_node *node; |
| struct http_error_msg *http_errmsg; |
| struct htx *htx; |
| int err_code = ERR_NONE; |
| |
| node = ebpt_first(&http_error_messages); |
| while (node) { |
| http_errmsg = container_of(node, typeof(*http_errmsg), node); |
| if (b_is_null(&http_errmsg->msg)) |
| goto next; |
| htx = htxbuf(&http_errmsg->msg); |
| if (htx_free_data_space(htx) < global.tune.maxrewrite) { |
| ha_warning("config: errorfile '%s' runs over the buffer space" |
| " reserved to headers rewriting. It may lead to internal errors if " |
| " http-after-response rules are evaluated on this message.\n", |
| (char *)node->key); |
| err_code |= ERR_WARN; |
| } |
| next: |
| node = ebpt_next(node); |
| } |
| |
| return err_code; |
| } |
| |
| int proxy_dup_default_conf_errors(struct proxy *curpx, const struct proxy *defpx, char **errmsg) |
| { |
| struct conf_errors *conf_err, *new_conf_err = NULL; |
| int ret = 0; |
| |
| list_for_each_entry(conf_err, &defpx->conf.errors, list) { |
| new_conf_err = calloc(1, sizeof(*new_conf_err)); |
| if (!new_conf_err) { |
| memprintf(errmsg, "unable to duplicate default errors (out of memory)."); |
| goto out; |
| } |
| new_conf_err->type = conf_err->type; |
| if (conf_err->type == 1) { |
| new_conf_err->info.errorfile.status = conf_err->info.errorfile.status; |
| new_conf_err->info.errorfile.reply = conf_err->info.errorfile.reply; |
| } |
| else { |
| new_conf_err->info.errorfiles.name = strdup(conf_err->info.errorfiles.name); |
| if (!new_conf_err->info.errorfiles.name) { |
| memprintf(errmsg, "unable to duplicate default errors (out of memory)."); |
| goto out; |
| } |
| memcpy(&new_conf_err->info.errorfiles.status, &conf_err->info.errorfiles.status, |
| sizeof(conf_err->info.errorfiles.status)); |
| } |
| new_conf_err->file = strdup(conf_err->file); |
| new_conf_err->line = conf_err->line; |
| LIST_APPEND(&curpx->conf.errors, &new_conf_err->list); |
| new_conf_err = NULL; |
| } |
| ret = 1; |
| |
| out: |
| free(new_conf_err); |
| return ret; |
| } |
| |
| void proxy_release_conf_errors(struct proxy *px) |
| { |
| struct conf_errors *conf_err, *conf_err_back; |
| |
| list_for_each_entry_safe(conf_err, conf_err_back, &px->conf.errors, list) { |
| if (conf_err->type == 0) |
| free(conf_err->info.errorfiles.name); |
| LIST_DELETE(&conf_err->list); |
| free(conf_err->file); |
| free(conf_err); |
| } |
| } |
| |
| /* |
| * Parse an <http-errors> section. |
| * Returns the error code, 0 if OK, or any combination of : |
| * - ERR_ABORT: must abort ASAP |
| * - ERR_FATAL: we can continue parsing but not start the service |
| * - ERR_WARN: a warning has been emitted |
| * - ERR_ALERT: an alert has been emitted |
| * Only the two first ones can stop processing, the two others are just |
| * indicators. |
| */ |
| static int cfg_parse_http_errors(const char *file, int linenum, char **args, int kwm) |
| { |
| static struct http_errors *curr_errs = NULL; |
| int err_code = 0; |
| const char *err; |
| char *errmsg = NULL; |
| |
| if (strcmp(args[0], "http-errors") == 0) { /* new errors section */ |
| if (!*args[1]) { |
| ha_alert("parsing [%s:%d] : missing name for http-errors section.\n", file, linenum); |
| err_code |= ERR_ALERT | ERR_ABORT; |
| goto out; |
| } |
| |
| err = invalid_char(args[1]); |
| if (err) { |
| ha_alert("parsing [%s:%d] : character '%c' is not permitted in '%s' name '%s'.\n", |
| file, linenum, *err, args[0], args[1]); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| } |
| |
| list_for_each_entry(curr_errs, &http_errors_list, list) { |
| /* Error if two errors section owns the same name */ |
| if (strcmp(curr_errs->id, args[1]) == 0) { |
| ha_alert("parsing [%s:%d]: http-errors section '%s' already exists (declared at %s:%d).\n", |
| file, linenum, args[1], curr_errs->conf.file, curr_errs->conf.line); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| } |
| } |
| |
| if ((curr_errs = calloc(1, sizeof(*curr_errs))) == NULL) { |
| ha_alert("parsing [%s:%d] : out of memory.\n", file, linenum); |
| err_code |= ERR_ALERT | ERR_ABORT; |
| goto out; |
| } |
| |
| LIST_APPEND(&http_errors_list, &curr_errs->list); |
| curr_errs->id = strdup(args[1]); |
| curr_errs->conf.file = strdup(file); |
| curr_errs->conf.line = linenum; |
| } |
| else if (strcmp(args[0], "errorfile") == 0) { /* error message from a file */ |
| struct http_reply *reply; |
| struct buffer *msg; |
| int status, rc; |
| |
| if (*(args[1]) == 0 || *(args[2]) == 0) { |
| ha_alert("parsing [%s:%d] : %s: expects <status_code> and <file> as arguments.\n", |
| file, linenum, args[0]); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| goto out; |
| } |
| |
| status = atol(args[1]); |
| msg = http_parse_errorfile(status, args[2], &errmsg); |
| if (!msg) { |
| ha_alert("parsing [%s:%d] : %s : %s\n", file, linenum, args[0], errmsg); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| goto out; |
| } |
| if (errmsg) { |
| ha_warning("parsing [%s:%d] : %s: %s\n", file, linenum, args[0], errmsg); |
| err_code |= ERR_WARN; |
| } |
| |
| reply = calloc(1, sizeof(*reply)); |
| if (!reply) { |
| ha_alert("parsing [%s:%d] : %s : out of memory.\n", file, linenum, args[0]); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| goto out; |
| } |
| reply->type = HTTP_REPLY_ERRMSG; |
| reply->status = status; |
| reply->ctype = NULL; |
| LIST_INIT(&reply->hdrs); |
| reply->body.errmsg = msg; |
| |
| rc = http_get_status_idx(status); |
| curr_errs->replies[rc] = reply; |
| } |
| else if (*args[0] != 0) { |
| ha_alert("parsing [%s:%d] : unknown keyword '%s' in '%s' section\n", file, linenum, args[0], cursection); |
| err_code |= ERR_ALERT | ERR_FATAL; |
| goto out; |
| } |
| |
| out: |
| free(errmsg); |
| return err_code; |
| } |
| |
| static struct cfg_kw_list cfg_kws = {ILH, { |
| { CFG_LISTEN, "errorloc", proxy_parse_errorloc }, |
| { CFG_LISTEN, "errorloc302", proxy_parse_errorloc }, |
| { CFG_LISTEN, "errorloc303", proxy_parse_errorloc }, |
| { CFG_LISTEN, "errorfile", proxy_parse_errorfile }, |
| { CFG_LISTEN, "errorfiles", proxy_parse_errorfiles }, |
| { CFG_LISTEN, "http-error", proxy_parse_http_error }, |
| { 0, NULL, NULL }, |
| }}; |
| |
| INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws); |
| REGISTER_POST_PROXY_CHECK(proxy_check_errors); |
| REGISTER_POST_CHECK(post_check_errors); |
| |
| REGISTER_CONFIG_SECTION("http-errors", cfg_parse_http_errors, NULL); |
| |
| /************************************************************************/ |
| /* HTX sample fetches */ |
| /************************************************************************/ |
| |
| /* Returns 1 if a stream is an HTX stream. Otherwise, it returns 0. */ |
| static int |
| smp_fetch_is_htx(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| if (!smp->strm) |
| return 0; |
| |
| smp->data.u.sint = !!IS_HTX_STRM(smp->strm); |
| smp->data.type = SMP_T_BOOL; |
| return 1; |
| } |
| |
| /* Returns the number of blocks in an HTX message. The channel is chosen |
| * depending on the sample direction. */ |
| static int |
| smp_fetch_htx_nbblks(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| |
| if (!smp->strm) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| smp->data.u.sint = htx_nbblks(htx); |
| smp->data.type = SMP_T_SINT; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the size of an HTX message. The channel is chosen depending on the |
| * sample direction. */ |
| static int |
| smp_fetch_htx_size(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| |
| if (!smp->strm) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| smp->data.u.sint = htx->size; |
| smp->data.type = SMP_T_SINT; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the data size of an HTX message. The channel is chosen depending on the |
| * sample direction. */ |
| static int |
| smp_fetch_htx_data(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| |
| if (!smp->strm) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| smp->data.u.sint = htx->data; |
| smp->data.type = SMP_T_SINT; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the used space (data+meta) of an HTX message. The channel is chosen |
| * depending on the sample direction. */ |
| static int |
| smp_fetch_htx_used(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| |
| if (!smp->strm) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| smp->data.u.sint = htx_used_space(htx); |
| smp->data.type = SMP_T_SINT; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the free space (size-used) of an HTX message. The channel is chosen |
| * depending on the sample direction. */ |
| static int |
| smp_fetch_htx_free(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| |
| if (!smp->strm) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| smp->data.u.sint = htx_free_space(htx); |
| smp->data.type = SMP_T_SINT; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the free space for data (free-sizeof(blk)) of an HTX message. The |
| * channel is chosen depending on the sample direction. */ |
| static int |
| smp_fetch_htx_free_data(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| |
| if (!smp->strm) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| smp->data.u.sint = htx_free_data_space(htx); |
| smp->data.type = SMP_T_SINT; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns 1 if the HTX message contains EOM flag. Otherwise it returns 0. The |
| * channel is chosen depending on the sample direction. |
| */ |
| static int |
| smp_fetch_htx_has_eom(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| |
| if (!smp->strm) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| smp->data.u.sint = !!(htx->flags & HTX_FL_EOM); |
| smp->data.type = SMP_T_BOOL; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the type of a specific HTX block, if found in the message. Otherwise |
| * HTX_BLK_UNUSED is returned. Any positive integer (>= 0) is supported or |
| * "head", "tail" or "first". The channel is chosen depending on the sample |
| * direction. */ |
| static int |
| smp_fetch_htx_blk_type(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| enum htx_blk_type type; |
| int32_t pos; |
| |
| if (!smp->strm || !arg_p) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| pos = arg_p[0].data.sint; |
| if (pos == -1) |
| type = htx_get_head_type(htx); |
| else if (pos == -2) |
| type = htx_get_tail_type(htx); |
| else if (pos == -3) |
| type = htx_get_first_type(htx); |
| else |
| type = ((pos >= htx->head && pos <= htx->tail) |
| ? htx_get_blk_type(htx_get_blk(htx, pos)) |
| : HTX_BLK_UNUSED); |
| |
| chunk_initstr(&smp->data.u.str, htx_blk_type_str(type)); |
| smp->data.type = SMP_T_STR; |
| smp->flags = SMP_F_CONST | SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the size of a specific HTX block, if found in the message. Otherwise |
| * 0 is returned. Any positive integer (>= 0) is supported or "head", "tail" or |
| * "first". The channel is chosen depending on the sample direction. */ |
| static int |
| smp_fetch_htx_blk_size(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| struct htx_blk *blk; |
| int32_t pos; |
| |
| if (!smp->strm || !arg_p) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| pos = arg_p[0].data.sint; |
| if (pos == -1) |
| blk = htx_get_head_blk(htx); |
| else if (pos == -2) |
| blk = htx_get_tail_blk(htx); |
| else if (pos == -3) |
| blk = htx_get_first_blk(htx); |
| else |
| blk = ((pos >= htx->head && pos <= htx->tail) ? htx_get_blk(htx, pos) : NULL); |
| |
| smp->data.u.sint = (blk ? htx_get_blksz(blk) : 0); |
| smp->data.type = SMP_T_SINT; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the start-line if the selected HTX block exists and is a |
| * start-line. Otherwise 0 an empty string. Any positive integer (>= 0) is |
| * supported or "head", "tail" or "first". The channel is chosen depending on |
| * the sample direction. */ |
| static int |
| smp_fetch_htx_blk_stline(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct buffer *temp; |
| struct channel *chn; |
| struct htx *htx; |
| struct htx_blk *blk; |
| struct htx_sl *sl; |
| int32_t pos; |
| |
| if (!smp->strm || !arg_p) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| pos = arg_p[0].data.sint; |
| if (pos == -1) |
| blk = htx_get_head_blk(htx); |
| else if (pos == -2) |
| blk = htx_get_tail_blk(htx); |
| else if (pos == -3) |
| blk = htx_get_first_blk(htx); |
| else |
| blk = ((pos >= htx->head && pos <= htx->tail) ? htx_get_blk(htx, pos) : NULL); |
| |
| if (!blk || (htx_get_blk_type(blk) != HTX_BLK_REQ_SL && htx_get_blk_type(blk) != HTX_BLK_RES_SL)) { |
| smp->data.u.str.size = 0; |
| smp->data.u.str.area = ""; |
| smp->data.u.str.data = 0; |
| } |
| else { |
| sl = htx_get_blk_ptr(htx, blk); |
| |
| temp = get_trash_chunk(); |
| chunk_istcat(temp, htx_sl_p1(sl)); |
| temp->area[temp->data++] = ' '; |
| chunk_istcat(temp, htx_sl_p2(sl)); |
| temp->area[temp->data++] = ' '; |
| chunk_istcat(temp, htx_sl_p3(sl)); |
| |
| smp->data.u.str = *temp; |
| } |
| |
| smp->data.type = SMP_T_STR; |
| smp->flags = SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the header name if the selected HTX block exists and is a header or a |
| * trailer. Otherwise 0 an empty string. Any positive integer (>= 0) is |
| * supported or "head", "tail" or "first". The channel is chosen depending on |
| * the sample direction. */ |
| static int |
| smp_fetch_htx_blk_hdrname(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| struct htx_blk *blk; |
| int32_t pos; |
| |
| if (!smp->strm || !arg_p) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| pos = arg_p[0].data.sint; |
| if (pos == -1) |
| blk = htx_get_head_blk(htx); |
| else if (pos == -2) |
| blk = htx_get_tail_blk(htx); |
| else if (pos == -3) |
| blk = htx_get_first_blk(htx); |
| else |
| blk = ((pos >= htx->head && pos <= htx->tail) ? htx_get_blk(htx, pos) : NULL); |
| |
| if (!blk || (htx_get_blk_type(blk) != HTX_BLK_HDR && htx_get_blk_type(blk) != HTX_BLK_TLR)) { |
| smp->data.u.str.size = 0; |
| smp->data.u.str.area = ""; |
| smp->data.u.str.data = 0; |
| } |
| else { |
| struct ist name = htx_get_blk_name(htx, blk); |
| |
| chunk_initlen(&smp->data.u.str, name.ptr, name.len, name.len); |
| } |
| smp->data.type = SMP_T_STR; |
| smp->flags = SMP_F_CONST | SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the header value if the selected HTX block exists and is a header or |
| * a trailer. Otherwise 0 an empty string. Any positive integer (>= 0) is |
| * supported or "head", "tail" or "first". The channel is chosen depending on |
| * the sample direction. */ |
| static int |
| smp_fetch_htx_blk_hdrval(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| struct htx_blk *blk; |
| int32_t pos; |
| |
| if (!smp->strm || !arg_p) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| pos = arg_p[0].data.sint; |
| if (pos == -1) |
| blk = htx_get_head_blk(htx); |
| else if (pos == -2) |
| blk = htx_get_tail_blk(htx); |
| else if (pos == -3) |
| blk = htx_get_first_blk(htx); |
| else |
| blk = ((pos >= htx->head && pos <= htx->tail) ? htx_get_blk(htx, pos) : NULL); |
| |
| if (!blk || (htx_get_blk_type(blk) != HTX_BLK_HDR && htx_get_blk_type(blk) != HTX_BLK_TLR)) { |
| smp->data.u.str.size = 0; |
| smp->data.u.str.area = ""; |
| smp->data.u.str.data = 0; |
| } |
| else { |
| struct ist val = htx_get_blk_value(htx, blk); |
| |
| chunk_initlen(&smp->data.u.str, val.ptr, val.len, val.len); |
| } |
| smp->data.type = SMP_T_STR; |
| smp->flags = SMP_F_CONST | SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* Returns the value if the selected HTX block exists and is a data |
| * block. Otherwise 0 an empty string. Any positive integer (>= 0) is supported |
| * or "head", "tail" or "first". The channel is chosen depending on the sample |
| * direction. */ |
| static int |
| smp_fetch_htx_blk_data(const struct arg *arg_p, struct sample *smp, const char *kw, void *private) |
| { |
| struct channel *chn; |
| struct htx *htx; |
| struct htx_blk *blk; |
| int32_t pos; |
| |
| if (!smp->strm || !arg_p) |
| return 0; |
| |
| chn = ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_RES) ? &smp->strm->res : &smp->strm->req; |
| htx = smp_prefetch_htx(smp, chn, NULL, 0); |
| if (!htx) |
| return 0; |
| |
| pos = arg_p[0].data.sint; |
| if (pos == -1) |
| blk = htx_get_head_blk(htx); |
| else if (pos == -2) |
| blk = htx_get_tail_blk(htx); |
| else if (pos == -3) |
| blk = htx_get_first_blk(htx); |
| else |
| blk = ((pos >= htx->head && pos <= htx->tail) ? htx_get_blk(htx, pos) : NULL); |
| |
| if (!blk || htx_get_blk_type(blk) != HTX_BLK_DATA) { |
| smp->data.u.str.size = 0; |
| smp->data.u.str.area = ""; |
| smp->data.u.str.data = 0; |
| } |
| else { |
| struct ist val = htx_get_blk_value(htx, blk); |
| |
| chunk_initlen(&smp->data.u.str, val.ptr, val.len, val.len); |
| } |
| smp->data.type = SMP_T_BIN; |
| smp->flags = SMP_F_CONST | SMP_F_VOLATILE | SMP_F_MAY_CHANGE; |
| return 1; |
| } |
| |
| /* This function is used to validate the arguments passed to any "htx_blk" fetch |
| * keywords. An argument is expected by these keywords. It must be a positive |
| * integer or on of the following strings: "head", "tail" or "first". It returns |
| * 0 on error, and a non-zero value if OK. |
| */ |
| int val_blk_arg(struct arg *arg, char **err_msg) |
| { |
| if (arg[0].type != ARGT_STR || !arg[0].data.str.data) { |
| memprintf(err_msg, "a block position is expected (> 0) or a special block name (head, tail, first)"); |
| return 0; |
| } |
| if (arg[0].data.str.data == 4 && !strncmp(arg[0].data.str.area, "head", 4)) { |
| chunk_destroy(&arg[0].data.str); |
| arg[0].type = ARGT_SINT; |
| arg[0].data.sint = -1; |
| } |
| else if (arg[0].data.str.data == 4 && !strncmp(arg[0].data.str.area, "tail", 4)) { |
| chunk_destroy(&arg[0].data.str); |
| arg[0].type = ARGT_SINT; |
| arg[0].data.sint = -2; |
| } |
| else if (arg[0].data.str.data == 5 && !strncmp(arg[0].data.str.area, "first", 5)) { |
| chunk_destroy(&arg[0].data.str); |
| arg[0].type = ARGT_SINT; |
| arg[0].data.sint = -3; |
| } |
| else { |
| int pos; |
| |
| for (pos = 0; pos < arg[0].data.str.data; pos++) { |
| if (!isdigit((unsigned char)arg[0].data.str.area[pos])) { |
| memprintf(err_msg, "invalid block position"); |
| return 0; |
| } |
| } |
| |
| pos = strl2uic(arg[0].data.str.area, arg[0].data.str.data); |
| if (pos < 0) { |
| memprintf(err_msg, "block position must not be negative"); |
| return 0; |
| } |
| chunk_destroy(&arg[0].data.str); |
| arg[0].type = ARGT_SINT; |
| arg[0].data.sint = pos; |
| } |
| |
| return 1; |
| } |
| |
| |
| /* Note: must not be declared <const> as its list will be overwritten. |
| * Note: htx sample fetches should only used for development purpose. |
| */ |
| static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, { |
| { "internal.strm.is_htx", smp_fetch_is_htx, 0, NULL, SMP_T_BOOL, SMP_USE_INTRN }, |
| |
| { "internal.htx.nbblks", smp_fetch_htx_nbblks, 0, NULL, SMP_T_SINT, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx.size", smp_fetch_htx_size, 0, NULL, SMP_T_SINT, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx.data", smp_fetch_htx_data, 0, NULL, SMP_T_SINT, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx.used", smp_fetch_htx_used, 0, NULL, SMP_T_SINT, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx.free", smp_fetch_htx_free, 0, NULL, SMP_T_SINT, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx.free_data", smp_fetch_htx_free_data, 0, NULL, SMP_T_SINT, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx.has_eom", smp_fetch_htx_has_eom, 0, NULL, SMP_T_BOOL, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| |
| { "internal.htx_blk.type", smp_fetch_htx_blk_type, ARG1(1,STR), val_blk_arg, SMP_T_STR, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx_blk.size", smp_fetch_htx_blk_size, ARG1(1,STR), val_blk_arg, SMP_T_SINT, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx_blk.start_line", smp_fetch_htx_blk_stline, ARG1(1,STR), val_blk_arg, SMP_T_STR, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx_blk.hdrname", smp_fetch_htx_blk_hdrname, ARG1(1,STR), val_blk_arg, SMP_T_STR, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx_blk.hdrval", smp_fetch_htx_blk_hdrval, ARG1(1,STR), val_blk_arg, SMP_T_STR, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| { "internal.htx_blk.data", smp_fetch_htx_blk_data, ARG1(1,STR), val_blk_arg, SMP_T_BIN, SMP_USE_HRQHV|SMP_USE_HRSHV}, |
| |
| { /* END */ }, |
| }}; |
| |
| INITCALL1(STG_REGISTER, sample_register_fetches, &sample_fetch_keywords); |