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proto_http.c
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proto_http.c
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/*
* HTTP protocol analyzer
*
* Copyright 2000-2011 Willy Tarreau <w@1wt.eu>
*
* 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 <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <common/appsession.h>
#include <common/base64.h>
#include <common/compat.h>
#include <common/config.h>
#include <common/debug.h>
#include <common/memory.h>
#include <common/mini-clist.h>
#include <common/standard.h>
#include <common/ticks.h>
#include <common/time.h>
#include <common/uri_auth.h>
#include <common/version.h>
#include <types/capture.h>
#include <types/global.h>
#include <proto/acl.h>
#include <proto/auth.h>
#include <proto/backend.h>
#include <proto/buffers.h>
#include <proto/checks.h>
#include <proto/dumpstats.h>
#include <proto/fd.h>
#include <proto/frontend.h>
#include <proto/log.h>
#include <proto/hdr_idx.h>
#include <proto/pattern.h>
#include <proto/proto_tcp.h>
#include <proto/proto_http.h>
#include <proto/proxy.h>
#include <proto/queue.h>
#include <proto/server.h>
#include <proto/session.h>
#include <proto/stream_interface.h>
#include <proto/stream_sock.h>
#include <proto/task.h>
const char HTTP_100[] =
"HTTP/1.1 100 Continue\r\n\r\n";
const struct chunk http_100_chunk = {
.str = (char *)&HTTP_100,
.len = sizeof(HTTP_100)-1
};
/* Warning: no "connection" header is provided with the 3xx messages below */
const char *HTTP_301 =
"HTTP/1.1 301 Moved Permanently\r\n"
"Cache-Control: no-cache\r\n"
"Content-length: 0\r\n"
"Location: "; /* not terminated since it will be concatenated with the URL */
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 */
/* same as 302 except that the browser MUST retry with the GET method */
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 */
/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
const char *HTTP_401_fmt =
"HTTP/1.0 401 Unauthorized\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"WWW-Authenticate: Basic realm=\"%s\"\r\n"
"\r\n"
"<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
const char *HTTP_407_fmt =
"HTTP/1.0 407 Unauthorized\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"Proxy-Authenticate: Basic realm=\"%s\"\r\n"
"\r\n"
"<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
const int http_err_codes[HTTP_ERR_SIZE] = {
[HTTP_ERR_200] = 200, /* used by "monitor-uri" */
[HTTP_ERR_400] = 400,
[HTTP_ERR_403] = 403,
[HTTP_ERR_408] = 408,
[HTTP_ERR_500] = 500,
[HTTP_ERR_502] = 502,
[HTTP_ERR_503] = 503,
[HTTP_ERR_504] = 504,
};
static const char *http_err_msgs[HTTP_ERR_SIZE] = {
[HTTP_ERR_200] =
"HTTP/1.0 200 OK\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>200 OK</h1>\nService ready.\n</body></html>\n",
[HTTP_ERR_400] =
"HTTP/1.0 400 Bad request\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
[HTTP_ERR_403] =
"HTTP/1.0 403 Forbidden\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
[HTTP_ERR_408] =
"HTTP/1.0 408 Request Time-out\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
[HTTP_ERR_500] =
"HTTP/1.0 500 Server Error\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
[HTTP_ERR_502] =
"HTTP/1.0 502 Bad Gateway\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
[HTTP_ERR_503] =
"HTTP/1.0 503 Service Unavailable\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
[HTTP_ERR_504] =
"HTTP/1.0 504 Gateway Time-out\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
};
/* We must put the messages here since GCC cannot initialize consts depending
* on strlen().
*/
struct chunk http_err_chunks[HTTP_ERR_SIZE];
#define FD_SETS_ARE_BITFIELDS
#ifdef FD_SETS_ARE_BITFIELDS
/*
* This map is used with all the FD_* macros to check whether a particular bit
* is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
* which should be encoded. When FD_ISSET() returns non-zero, it means that the
* byte should be encoded. Be careful to always pass bytes from 0 to 255
* exclusively to the macros.
*/
fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
#else
#error "Check if your OS uses bitfields for fd_sets"
#endif
void init_proto_http()
{
int i;
char *tmp;
int msg;
for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
if (!http_err_msgs[msg]) {
Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
abort();
}
http_err_chunks[msg].str = (char *)http_err_msgs[msg];
http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
}
/* initialize the log header encoding map : '{|}"#' should be encoded with
* '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
* URL encoding only requires '"', '#' to be encoded as well as non-
* printable characters above.
*/
memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
memset(url_encode_map, 0, sizeof(url_encode_map));
for (i = 0; i < 32; i++) {
FD_SET(i, hdr_encode_map);
FD_SET(i, url_encode_map);
}
for (i = 127; i < 256; i++) {
FD_SET(i, hdr_encode_map);
FD_SET(i, url_encode_map);
}
tmp = "\"#{|}";
while (*tmp) {
FD_SET(*tmp, hdr_encode_map);
tmp++;
}
tmp = "\"#";
while (*tmp) {
FD_SET(*tmp, url_encode_map);
tmp++;
}
/* memory allocations */
pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
}
/*
* We have 26 list of methods (1 per first letter), each of which can have
* up to 3 entries (2 valid, 1 null).
*/
struct http_method_desc {
http_meth_t meth;
int len;
const char text[8];
};
const struct http_method_desc http_methods[26][3] = {
['C' - 'A'] = {
[0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
},
['D' - 'A'] = {
[0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
},
['G' - 'A'] = {
[0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
},
['H' - 'A'] = {
[0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
},
['P' - 'A'] = {
[0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
[1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
},
['T' - 'A'] = {
[0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
},
/* rest is empty like this :
* [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
*/
};
/* It is about twice as fast on recent architectures to lookup a byte in a
* table than to perform a boolean AND or OR between two tests. Refer to
* RFC2616 for those chars.
*/
const char http_is_spht[256] = {
[' '] = 1, ['\t'] = 1,
};
const char http_is_crlf[256] = {
['\r'] = 1, ['\n'] = 1,
};
const char http_is_lws[256] = {
[' '] = 1, ['\t'] = 1,
['\r'] = 1, ['\n'] = 1,
};
const char http_is_sep[256] = {
['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
[' '] = 1, ['\t'] = 1, ['\\'] = 1,
};
const char http_is_ctl[256] = {
[0 ... 31] = 1,
[127] = 1,
};
/*
* A token is any ASCII char that is neither a separator nor a CTL char.
* Do not overwrite values in assignment since gcc-2.95 will not handle
* them correctly. Instead, define every non-CTL char's status.
*/
const char http_is_token[256] = {
[' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
[','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
['|'] = 1, ['}'] = 0, ['~'] = 1,
};
/*
* An http ver_token is any ASCII which can be found in an HTTP version,
* which includes 'H', 'T', 'P', '/', '.' and any digit.
*/
const char http_is_ver_token[256] = {
['.'] = 1, ['/'] = 1,
['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
['H'] = 1, ['P'] = 1, ['T'] = 1,
};
/*
* Silent debug that outputs only in strace, using fd #-1. Trash is modified.
*/
#if defined(DEBUG_FSM)
static void http_silent_debug(int line, struct session *s)
{
int size = 0;
size += snprintf(trash + size, sizeof(trash) - size,
"[%04d] req: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p lr=%p sm=%d fw=%ld tf=%08x\n",
line,
s->si[0].state, s->si[0].fd, s->txn.req.msg_state, s->req->flags, s->req->analysers,
s->req->data, s->req->size, s->req->l, s->req->w, s->req->r, s->req->lr, s->req->send_max, s->req->to_forward, s->txn.flags);
write(-1, trash, size);
size = 0;
size += snprintf(trash + size, sizeof(trash) - size,
" %04d rep: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p lr=%p sm=%d fw=%ld\n",
line,
s->si[1].state, s->si[1].fd, s->txn.rsp.msg_state, s->rep->flags, s->rep->analysers,
s->rep->data, s->rep->size, s->rep->l, s->rep->w, s->rep->r, s->rep->lr, s->rep->send_max, s->rep->to_forward);
write(-1, trash, size);
}
#else
#define http_silent_debug(l,s) do { } while (0)
#endif
/*
* Adds a header and its CRLF at the tail of buffer <b>, just before the last
* CRLF. Text length is measured first, so it cannot be NULL.
* The header is also automatically added to the index <hdr_idx>, and the end
* of headers is automatically adjusted. The number of bytes added is returned
* on success, otherwise <0 is returned indicating an error.
*/
int http_header_add_tail(struct buffer *b, struct http_msg *msg,
struct hdr_idx *hdr_idx, const char *text)
{
int bytes, len;
len = strlen(text);
bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
if (!bytes)
return -1;
http_msg_move_end(msg, bytes);
return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
}
/*
* Adds a header and its CRLF at the tail of buffer <b>, just before the last
* CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
* the buffer is only opened and the space reserved, but nothing is copied.
* The header is also automatically added to the index <hdr_idx>, and the end
* of headers is automatically adjusted. The number of bytes added is returned
* on success, otherwise <0 is returned indicating an error.
*/
int http_header_add_tail2(struct buffer *b, struct http_msg *msg,
struct hdr_idx *hdr_idx, const char *text, int len)
{
int bytes;
bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
if (!bytes)
return -1;
http_msg_move_end(msg, bytes);
return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
}
/*
* Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
* If so, returns the position of the first non-space character relative to
* <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
* to return a pointer to the place after the first space. Returns 0 if the
* header name does not match. Checks are case-insensitive.
*/
int http_header_match2(const char *hdr, const char *end,
const char *name, int len)
{
const char *val;
if (hdr + len >= end)
return 0;
if (hdr[len] != ':')
return 0;
if (strncasecmp(hdr, name, len) != 0)
return 0;
val = hdr + len + 1;
while (val < end && HTTP_IS_SPHT(*val))
val++;
if ((val >= end) && (len + 2 <= end - hdr))
return len + 2; /* we may replace starting from second space */
return val - hdr;
}
/* Find the end of the header value contained between <s> and <e>. See RFC2616,
* par 2.2 for more information. Note that it requires a valid header to return
* a valid result. This works for headers defined as comma-separated lists.
*/
char *find_hdr_value_end(char *s, const char *e)
{
int quoted, qdpair;
quoted = qdpair = 0;
for (; s < e; s++) {
if (qdpair) qdpair = 0;
else if (quoted) {
if (*s == '\\') qdpair = 1;
else if (*s == '"') quoted = 0;
}
else if (*s == '"') quoted = 1;
else if (*s == ',') return s;
}
return s;
}
/* Find the first or next occurrence of header <name> in message buffer <sol>
* using headers index <idx>, and return it in the <ctx> structure. This
* structure holds everything necessary to use the header and find next
* occurrence. If its <idx> member is 0, 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. As a special case, if ctx->val
* is NULL when searching for a new values of a header, the current header is
* rescanned. This allows rescanning after a header deletion.
*/
int http_find_header2(const char *name, int len,
char *sol, struct hdr_idx *idx,
struct hdr_ctx *ctx)
{
char *eol, *sov;
int cur_idx, old_idx;
cur_idx = ctx->idx;
if (cur_idx) {
/* We have previously returned a value, let's search
* another one on the same line.
*/
sol = ctx->line;
ctx->del = ctx->val + ctx->vlen;
sov = sol + ctx->del;
eol = sol + idx->v[cur_idx].len;
if (sov >= eol)
/* no more values in this header */
goto next_hdr;
/* values remaining for this header, skip the comma but save it
* for later use (eg: for header deletion).
*/
sov++;
while (sov < eol && http_is_lws[(unsigned char)*sov])
sov++;
goto return_hdr;
}
/* first request for this header */
sol += hdr_idx_first_pos(idx);
old_idx = 0;
cur_idx = hdr_idx_first_idx(idx);
while (cur_idx) {
eol = sol + idx->v[cur_idx].len;
if (len == 0) {
/* No argument was passed, we want any header.
* To achieve this, we simply build a fake request. */
while (sol + len < eol && sol[len] != ':')
len++;
name = sol;
}
if ((len < eol - sol) &&
(sol[len] == ':') &&
(strncasecmp(sol, name, len) == 0)) {
ctx->del = len;
sov = sol + len + 1;
while (sov < eol && http_is_lws[(unsigned char)*sov])
sov++;
ctx->line = sol;
ctx->prev = old_idx;
return_hdr:
ctx->idx = cur_idx;
ctx->val = sov - sol;
eol = find_hdr_value_end(sov, eol);
ctx->vlen = eol - sov;
return 1;
}
next_hdr:
sol = eol + idx->v[cur_idx].cr + 1;
old_idx = cur_idx;
cur_idx = idx->v[cur_idx].next;
}
return 0;
}
int http_find_header(const char *name,
char *sol, struct hdr_idx *idx,
struct hdr_ctx *ctx)
{
return http_find_header2(name, strlen(name), sol, idx, ctx);
}
/* Remove one value of a header. This only works on a <ctx> returned by one of
* the http_find_header functions. 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 buffer <buf> and HTTP
* message <msg>. The new index is returned. If it is zero, it means there is
* no more header, so any processing may stop. The ctx is always left in a form
* that can be handled by http_find_header2() to find next occurrence.
*/
int http_remove_header2(struct http_msg *msg, struct buffer *buf,
struct hdr_idx *idx, struct hdr_ctx *ctx)
{
int cur_idx = ctx->idx;
char *sol = ctx->line;
struct hdr_idx_elem *hdr;
int delta, skip_comma;
if (!cur_idx)
return 0;
hdr = &idx->v[cur_idx];
if (sol[ctx->del] == ':' && ctx->val + ctx->vlen == hdr->len) {
/* This was the only value of the header, we must now remove it entirely. */
delta = buffer_replace2(buf, sol, sol + hdr->len + hdr->cr + 1, NULL, 0);
http_msg_move_end(msg, delta);
idx->used--;
hdr->len = 0; /* unused entry */
idx->v[ctx->prev].next = idx->v[ctx->idx].next;
if (idx->tail == ctx->idx)
idx->tail = ctx->prev;
ctx->idx = ctx->prev; /* walk back to the end of previous header */
ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1;
ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */
ctx->vlen = 0;
return ctx->idx;
}
/* This was not the only value of this header. We have to remove between
* ctx->del+1 and ctx->val+ctx->vlen+1 included. If it is the last entry
* of the list, we remove the last separator.
*/
skip_comma = (ctx->val + ctx->vlen == hdr->len) ? 0 : 1;
delta = buffer_replace2(buf, sol + ctx->del + skip_comma,
sol + ctx->val + ctx->vlen + skip_comma,
NULL, 0);
hdr->len += delta;
http_msg_move_end(msg, delta);
ctx->val = ctx->del;
ctx->vlen = 0;
return ctx->idx;
}
/* This function handles a server error at the stream interface level. The
* stream interface is assumed to be already in a closed state. An optional
* message is copied into the input buffer, and an HTTP status code stored.
* The error flags are set to the values in arguments. Any pending request
* in this buffer will be lost.
*/
static void http_server_error(struct session *t, struct stream_interface *si,
int err, int finst, int status, const struct chunk *msg)
{
buffer_auto_read(si->ob);
buffer_abort(si->ob);
buffer_auto_close(si->ob);
buffer_erase(si->ob);
buffer_auto_close(si->ib);
buffer_auto_read(si->ib);
if (status > 0 && msg) {
t->txn.status = status;
buffer_write(si->ib, msg->str, msg->len);
}
if (!(t->flags & SN_ERR_MASK))
t->flags |= err;
if (!(t->flags & SN_FINST_MASK))
t->flags |= finst;
}
/* This function returns the appropriate error location for the given session
* and message.
*/
struct chunk *error_message(struct session *s, int msgnum)
{
if (s->be->errmsg[msgnum].str)
return &s->be->errmsg[msgnum];
else if (s->fe->errmsg[msgnum].str)
return &s->fe->errmsg[msgnum];
else
return &http_err_chunks[msgnum];
}
/*
* returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
* string), HTTP_METH_OTHER for unknown methods, or the identified method.
*/
static http_meth_t find_http_meth(const char *str, const int len)
{
unsigned char m;
const struct http_method_desc *h;
m = ((unsigned)*str - 'A');
if (m < 26) {
for (h = http_methods[m]; h->len > 0; h++) {
if (unlikely(h->len != len))
continue;
if (likely(memcmp(str, h->text, h->len) == 0))
return h->meth;
};
return HTTP_METH_OTHER;
}
return HTTP_METH_NONE;
}
/* Parse the URI from the given transaction (which is assumed to be in request
* phase) and look for the "/" beginning the PATH. If not found, return NULL.
* It is returned otherwise.
*/
static char *
http_get_path(struct http_txn *txn)
{
char *ptr, *end;
ptr = txn->req.sol + txn->req.sl.rq.u;
end = ptr + txn->req.sl.rq.u_l;
if (ptr >= end)
return NULL;
/* RFC2616, par. 5.1.2 :
* Request-URI = "*" | absuri | abspath | authority
*/
if (*ptr == '*')
return NULL;
if (isalpha((unsigned char)*ptr)) {
/* this is a scheme as described by RFC3986, par. 3.1 */
ptr++;
while (ptr < end &&
(isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
ptr++;
/* skip '://' */
if (ptr == end || *ptr++ != ':')
return NULL;
if (ptr == end || *ptr++ != '/')
return NULL;
if (ptr == end || *ptr++ != '/')
return NULL;
}
/* skip [user[:passwd]@]host[:[port]] */
while (ptr < end && *ptr != '/')
ptr++;
if (ptr == end)
return NULL;
/* OK, we got the '/' ! */
return ptr;
}
/* Returns a 302 for a redirectable request. This may only be called just after
* the stream interface has moved to SI_ST_ASS. Unprocessable requests are
* left unchanged and will follow normal proxy processing.
*/
void perform_http_redirect(struct session *s, struct stream_interface *si)
{
struct http_txn *txn;
struct chunk rdr;
struct server *srv;
char *path;
int len;
/* 1: create the response header */
rdr.len = strlen(HTTP_302);
rdr.str = trash;
rdr.size = sizeof(trash);
memcpy(rdr.str, HTTP_302, rdr.len);
srv = target_srv(&s->target);
/* 2: add the server's prefix */
if (rdr.len + srv->rdr_len > rdr.size)
return;
/* special prefix "/" means don't change URL */
if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
memcpy(rdr.str + rdr.len, srv->rdr_pfx, srv->rdr_len);
rdr.len += srv->rdr_len;
}
/* 3: add the request URI */
txn = &s->txn;
path = http_get_path(txn);
if (!path)
return;
len = txn->req.sl.rq.u_l + (txn->req.sol + txn->req.sl.rq.u) - path;
if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
return;
memcpy(rdr.str + rdr.len, path, len);
rdr.len += len;
if (unlikely(txn->flags & TX_USE_PX_CONN)) {
memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
rdr.len += 29;
} else {
memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
rdr.len += 23;
}
/* prepare to return without error. */
si->shutr(si);
si->shutw(si);
si->err_type = SI_ET_NONE;
si->err_loc = NULL;
si->state = SI_ST_CLO;
/* send the message */
http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
/* FIXME: we should increase a counter of redirects per server and per backend. */
if (srv)
srv_inc_sess_ctr(srv);
}
/* Return the error message corresponding to si->err_type. It is assumed
* that the server side is closed. Note that err_type is actually a
* bitmask, where almost only aborts may be cumulated with other
* values. We consider that aborted operations are more important
* than timeouts or errors due to the fact that nobody else in the
* logs might explain incomplete retries. All others should avoid
* being cumulated. It should normally not be possible to have multiple
* aborts at once, but just in case, the first one in sequence is reported.
*/
void http_return_srv_error(struct session *s, struct stream_interface *si)
{
int err_type = si->err_type;
if (err_type & SI_ET_QUEUE_ABRT)
http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
503, error_message(s, HTTP_ERR_503));
else if (err_type & SI_ET_CONN_ABRT)
http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
503, error_message(s, HTTP_ERR_503));
else if (err_type & SI_ET_QUEUE_TO)
http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
503, error_message(s, HTTP_ERR_503));
else if (err_type & SI_ET_QUEUE_ERR)
http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q,
503, error_message(s, HTTP_ERR_503));
else if (err_type & SI_ET_CONN_TO)
http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
503, error_message(s, HTTP_ERR_503));
else if (err_type & SI_ET_CONN_ERR)
http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
503, error_message(s, HTTP_ERR_503));
else /* SI_ET_CONN_OTHER and others */
http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
500, error_message(s, HTTP_ERR_500));
}
extern const char sess_term_cond[8];
extern const char sess_fin_state[8];
extern const char *monthname[12];
const char sess_cookie[8] = "NIDVEO67"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie, Expired cookie, Old cookie, unknown */
const char sess_set_cookie[8] = "NPDIRU67"; /* No set-cookie, Set-cookie found and left unchanged (passive),
Set-cookie Deleted, Set-Cookie Inserted, Set-cookie Rewritten,
Set-cookie Updated, unknown, unknown */
struct pool_head *pool2_requri;
struct pool_head *pool2_capture;
void http_sess_clflog(struct session *s)
{
char pn[INET6_ADDRSTRLEN];
struct proxy *fe = s->fe;
struct proxy *be = s->be;
struct proxy *prx_log;
struct http_txn *txn = &s->txn;
int tolog, level, err;
char *uri, *h;
const char *svid;
struct tm tm;
static char tmpline[MAX_SYSLOG_LEN];
int hdr;
size_t w;
int t_request;
prx_log = fe;
err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
(s->req->cons->conn_retries != be->conn_retries) ||
txn->status >= 500;
if (s->req->prod->addr.c.from.ss_family == AF_INET)
inet_ntop(AF_INET,
(const void *)&((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_addr,
pn, sizeof(pn));
else if (s->req->prod->addr.c.from.ss_family == AF_INET6)
inet_ntop(AF_INET6,
(const void *)&((struct sockaddr_in6 *)(&s->req->prod->addr.c.from))->sin6_addr,
pn, sizeof(pn));
else
snprintf(pn, sizeof(pn), "unix:%d", s->listener->luid);
get_gmtime(s->logs.accept_date.tv_sec, &tm);
/* FIXME: let's limit ourselves to frontend logging for now. */
tolog = fe->to_log;
h = tmpline;
w = snprintf(h, sizeof(tmpline),
"%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
pn,
tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
tm.tm_hour, tm.tm_min, tm.tm_sec);
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
goto trunc;
h += w;
if (h >= tmpline + sizeof(tmpline) - 4)
goto trunc;
*(h++) = ' ';
*(h++) = '\"';
uri = txn->uri ? txn->uri : "<BADREQ>";
h = encode_string(h, tmpline + sizeof(tmpline) - 1,
'#', url_encode_map, uri);
*(h++) = '\"';
w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
goto trunc;
h += w;
if (h >= tmpline + sizeof(tmpline) - 9)
goto trunc;
memcpy(h, " \"-\" \"-\"", 8);
h += 8;
w = snprintf(h, sizeof(tmpline) - (h - tmpline),
" %d %03d",
s->req->prod->addr.c.from.ss_family == AF_UNIX ? s->listener->luid :
ntohs((s->req->prod->addr.c.from.ss_family == AF_INET) ?
((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_port :
((struct sockaddr_in6 *)&s->req->prod->addr.c.from)->sin6_port),
(int)s->logs.accept_date.tv_usec/1000);
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
goto trunc;
h += w;
w = strlen(fe->id);
if (h >= tmpline + sizeof(tmpline) - 4 - w)
goto trunc;
*(h++) = ' ';
*(h++) = '\"';
memcpy(h, fe->id, w);
h += w;
*(h++) = '\"';
w = strlen(be->id);
if (h >= tmpline + sizeof(tmpline) - 4 - w)
goto trunc;
*(h++) = ' ';
*(h++) = '\"';
memcpy(h, be->id, w);
h += w;
*(h++) = '\"';
if (!(tolog & LW_SVID))
svid = "-";
else switch (s->target.type) {
case TARG_TYPE_SERVER:
svid = s->target.ptr.s->id;
break;
case TARG_TYPE_APPLET:
svid = s->target.ptr.a->name;
break;
default:
svid = "<NOSRV>";
break;
}
w = strlen(svid);
if (h >= tmpline + sizeof(tmpline) - 4 - w)
goto trunc;
*(h++) = ' ';
*(h++) = '\"';
memcpy(h, svid, w);
h += w;
*(h++) = '\"';
t_request = -1;
if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
w = snprintf(h, sizeof(tmpline) - (h - tmpline),
" %d %ld %ld %ld %ld",
t_request,
(s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
(s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
(s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
s->logs.t_close);
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
goto trunc;
h += w;
if (h >= tmpline + sizeof(tmpline) - 8)
goto trunc;
*(h++) = ' ';
*(h++) = '\"';
*(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
*(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
*(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
*(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
*(h++) = '\"';
w = snprintf(h, sizeof(tmpline) - (h - tmpline),
" %d %d %d %d %d %ld %ld",
actconn, fe->feconn, be->beconn, target_srv(&s->target) ? target_srv(&s->target)->cur_sess : 0,
(s->req->cons->conn_retries > 0) ? (be->conn_retries - s->req->cons->conn_retries) : be->conn_retries,
s->logs.srv_queue_size, s->logs.prx_queue_size);
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
goto trunc;
h += w;