summaryrefslogtreecommitdiffstats
path: root/src/http_htx.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/http_htx.c3028
1 files changed, 3028 insertions, 0 deletions
diff --git a/src/http_htx.c b/src/http_htx.c
new file mode 100644
index 0000000..004d343
--- /dev/null
+++ b/src/http_htx.c
@@ -0,0 +1,3028 @@
+/*
+ * 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-hdr.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 = istend(ctx->value) + ctx->lws_after;
+ v.len -= (p - v.ptr);
+ v.ptr = p;
+ if (!v.len)
+ goto next_blk;
+ /* Skip comma */
+ if (*(v.ptr) == ',') {
+ v = istnext(v);
+ }
+
+ 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(istend(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 = istnext(v);
+ ctx->lws_before++;
+ }
+ if (!(flags & HTTP_FIND_FL_FULL))
+ v.len = http_find_hdr_value_end(v.ptr, istend(v)) - v.ptr;
+
+ while (v.len && HTTP_IS_LWS(*(istend(v) - 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);
+ ALREADY_CHECKED(sl); /* the stline exists because http_replace_stline() succeeded */
+
+ sl->flags &= ~HTX_SL_F_NORMALIZED_URI;
+ 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;
+ struct http_uri_parser parser;
+
+ if (!sl)
+ return 0;
+
+ uri = htx_sl_req_uri(sl);
+ parser = http_uri_parser_init(uri);
+ p = http_parse_path(&parser);
+ 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_istcat(temp, path); /* 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 = istnext(q);
+ }
+
+ /* 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 = istnext(q);
+ }
+ 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);
+}
+
+/* Append new value <data> after <ctx> value in header
+ * if header is not empty (at least one value exists):
+ * - ',' delimiter is added before <data> is appended
+ * - <ctx> must be valid and must point to an existing value,
+ * else it is an error and prepend_value should be used instead.
+ *
+ * ctx is updated to point to new value
+ *
+ * Returns 1 on success and 0 on failure.
+ */
+int http_append_header_value(struct htx *htx, struct http_hdr_ctx *ctx, const struct ist data)
+{
+ char *start;
+ struct htx_blk *blk = ctx->blk;
+ struct ist v;
+ uint32_t off = 0;
+
+ if (!blk)
+ goto fail;
+
+ v = htx_get_blk_value(htx, blk);
+
+ if (!istlen(v)) {
+ start = v.ptr;
+ goto empty; /* header is empty, append without ',' */
+ }
+ if (unlikely(!istlen(ctx->value)))
+ goto fail; /* invalid: value is empty, not supported */
+
+ start = istend(ctx->value) + ctx->lws_after;
+ off = start - v.ptr;
+
+ blk = htx_replace_blk_value(htx, blk, ist2(start, 0), ist(","));
+ if (!blk)
+ goto fail;
+ off += 1; /* add 1 for ',' */
+ v = htx_get_blk_value(htx, blk);
+ start = v.ptr + off;
+
+ empty:
+ blk = htx_replace_blk_value(htx, blk, ist2(start, 0), data);
+ if (!blk)
+ goto fail;
+ v = htx_get_blk_value(htx, blk);
+
+ ctx->blk = blk;
+ ctx->value = ist2(v.ptr + off, data.len);
+ ctx->lws_before = ctx->lws_after = 0;
+
+ return 1;
+ fail:
+ return 0;
+}
+
+/* Prepend new value <data> before <ctx> value in header
+ * if <ctx> is not first value (at least one value exists):
+ * - ',' delimiter is added after <data> is prepended
+ *
+ * ctx is updated to point to new value
+ *
+ * Returns 1 on success and 0 on failure.
+ */
+int http_prepend_header_value(struct htx *htx, struct http_hdr_ctx *ctx, const struct ist data)
+{
+ char *start;
+ struct htx_blk *blk = ctx->blk;
+ struct ist v;
+ uint32_t off = 0;
+ uint8_t first;
+
+ if (!blk)
+ goto fail;
+
+ v = htx_get_blk_value(htx, blk);
+
+ first = !istlen(v);
+ start = first ? v.ptr : istptr(ctx->value) - ctx->lws_before;
+
+ if (unlikely(!istlen(ctx->value)))
+ goto fail; /* invalid: value is empty, not supported */
+
+ off = start - v.ptr;
+
+ blk = htx_replace_blk_value(htx, blk, ist2(start, 0), data);
+ if (!blk)
+ goto fail;
+ v = htx_get_blk_value(htx, blk);
+
+ if (first)
+ goto end; /* header is empty, don't append ',' */
+
+ start = v.ptr + off + data.len;
+
+ blk = htx_replace_blk_value(htx, blk, ist2(start, 0), ist(","));
+ if (!blk)
+ goto fail;
+ v = htx_get_blk_value(htx, blk);
+
+ end:
+ ctx->blk = blk;
+ ctx->value = ist2(v.ptr + off, data.len);
+ ctx->lws_before = ctx->lws_after = 0;
+
+ return 1;
+ fail:
+ return 0;
+}
+
+/* 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 = ist2(v.ptr + off, 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 = ist2(start, 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;
+ struct http_uri_parser parser;
+
+ uri = htx_sl_req_uri(sl);
+ parser = http_uri_parser_init(uri);
+ authority = http_parse_authority(&parser, 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_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 */
+
+ 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;
+ struct http_uri_parser parser = http_uri_parser_init(uri);
+
+ if (parser.format == URI_PARSER_FORMAT_EMPTY ||
+ parser.format == URI_PARSER_FORMAT_ASTERISK ||
+ parser.format == URI_PARSER_FORMAT_ABSPATH) {
+ 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_parse_authority(&parser, 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, istend(raw),
+ hdrs, sizeof(hdrs)/sizeof(hdrs[0]), &h1m, &h1sl);
+ if (ret <= 0) {
+ memprintf(errmsg, "unable 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 = ist(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);
+ }
+
+ for (rc = 0; rc < HTTP_ERR_SIZE; rc++)
+ chunk_destroy(&http_err_chunks[rc]);
+}
+
+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;
+ struct http_uri_parser parser;
+
+ 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);
+
+ parser = http_uri_parser_init(uri);
+ scheme = http_parse_scheme(&parser);
+ /* if no scheme found, no normalization to proceed */
+ if (!isttest(scheme))
+ return 0;
+
+ /* Extract the port if present in authority */
+ authority = http_parse_authority(&parser, 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 (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;
+}
+
+/* First step function to merge multiple cookie headers in a single entry.
+ *
+ * Use it for each cookie header at <idx> index over HTTP headers in <list>.
+ * <first> and <last> are state variables used internally and must be
+ * initialized to -1 before the first invocation.
+ */
+void http_cookie_register(struct http_hdr *list, int idx, int *first, int *last)
+{
+ /* Build a linked list of cookie headers. Use header length to point to
+ * the next one. The last entry will contains -1.
+ */
+
+ /* Caller is responsible to initialize *first and *last to -1 on first
+ * invocation. Both will thus be set to a valid index after it.
+ */
+ BUG_ON(*first > 0 && *last < 0);
+
+ /* Mark the current end of cookie linked list. */
+ list[idx].n.len = -1;
+ if (*first < 0) {
+ /* Save first found cookie for http_cookie_merge call. */
+ *first = idx;
+ }
+ else {
+ /* Update linked list of cookies. */
+ list[*last].n.len = idx;
+ }
+
+ *last = idx;
+}
+
+/* Second step to merge multiple cookie headers in a single entry.
+ *
+ * Use it when looping over HTTP headers is done and <htx> message is built.
+ * This will concatenate each cookie headers present from <list> directly into
+ * <htx> message. <first> is reused from previous http_cookie_register
+ * invocation.
+ *
+ * Returns 0 on success else non-zero.
+ */
+int http_cookie_merge(struct htx *htx, struct http_hdr *list, int first)
+{
+ uint32_t fs; /* free space */
+ uint32_t bs; /* block size */
+ uint32_t vl; /* value len */
+ uint32_t tl; /* total length */
+ struct htx_blk *blk;
+
+ if (first < 0)
+ return 0;
+
+ blk = htx_add_header(htx, ist("cookie"), list[first].v);
+ if (!blk)
+ return 1;
+
+ tl = list[first].v.len;
+ fs = htx_free_data_space(htx);
+ bs = htx_get_blksz(blk);
+
+ /* for each extra cookie, we'll extend the cookie's value and insert
+ * ";" before the new value.
+ */
+ fs += tl; /* first one is already counted */
+
+ /* Loop over cookies linked list built from http_cookie_register. */
+ while ((first = list[first].n.len) >= 0) {
+ vl = list[first].v.len;
+ tl += vl + 2;
+ if (tl > fs)
+ return 1;
+
+ htx_change_blk_value_len(htx, blk, tl);
+ *(char *)(htx_get_blk_ptr(htx, blk) + bs + 0) = ';';
+ *(char *)(htx_get_blk_ptr(htx, blk) + bs + 1) = ' ';
+ memcpy(htx_get_blk_ptr(htx, blk) + bs + 2,
+ list[first].v.ptr, vl);
+ bs += vl + 2;
+ }
+
+ return 0;
+}
+
+/* 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("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);