blob: bb9474c8d957871de5faa8dd06ec0621977b105e [file] [log] [blame]
/*
* 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);