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apache/httpd/refs/heads/docs-modern-css/./modules/proxy/mod_proxy.c
blob: b83e46ce6596fd2a0f4fc68c3cc1a39617556d83 [file]
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "mod_proxy.h"
#include "mod_core.h"
#include "apr_optional.h"
#include "apr_strings.h"
#include "scoreboard.h"
#include "mod_status.h"
#include "proxy_util.h"
#if (MODULE_MAGIC_NUMBER_MAJOR > 20020903)
#include "mod_ssl.h"
#else
APR_DECLARE_OPTIONAL_FN(int, ssl_proxy_enable, (conn_rec *));
APR_DECLARE_OPTIONAL_FN(int, ssl_engine_disable, (conn_rec *));
APR_DECLARE_OPTIONAL_FN(int, ssl_engine_set, (conn_rec *,
ap_conf_vector_t *,
int proxy, int enable));
#endif
#ifndef MAX
#define MAX(x,y) ((x) >= (y) ? (x) : (y))
#endif
/*
* We do health-checks only if that (sub)module is loaded in. This
* allows for us to continue as is w/o requiring mod_watchdog for
* those implementations which aren't using health checks
*/
static APR_OPTIONAL_FN_TYPE(set_worker_hc_param) *set_worker_hc_param_f = NULL;
/* Externals */
proxy_hcmethods_t PROXY_DECLARE_DATA proxy_hcmethods[] = {
{NONE, "NONE", 1},
{TCP, "TCP", 1},
{OPTIONS, "OPTIONS", 1},
{HEAD, "HEAD", 1},
{GET, "GET", 1},
{CPING, "CPING", 0},
{PROVIDER, "PROVIDER", 0},
{OPTIONS11, "OPTIONS11", 1},
{HEAD11, "HEAD11", 1},
{GET11, "GET11", 1},
{EOT, NULL, 1}
};
proxy_wstat_t PROXY_DECLARE_DATA proxy_wstat_tbl[] = {
{PROXY_WORKER_INITIALIZED, PROXY_WORKER_INITIALIZED_FLAG, "Init "},
{PROXY_WORKER_IGNORE_ERRORS, PROXY_WORKER_IGNORE_ERRORS_FLAG, "Ign "},
{PROXY_WORKER_DRAIN, PROXY_WORKER_DRAIN_FLAG, "Drn "},
{PROXY_WORKER_GENERIC, PROXY_WORKER_GENERIC_FLAG, "Gen "},
{PROXY_WORKER_IN_SHUTDOWN, PROXY_WORKER_IN_SHUTDOWN_FLAG, "Shut "},
{PROXY_WORKER_DISABLED, PROXY_WORKER_DISABLED_FLAG, "Dis "},
{PROXY_WORKER_STOPPED, PROXY_WORKER_STOPPED_FLAG, "Stop "},
{PROXY_WORKER_IN_ERROR, PROXY_WORKER_IN_ERROR_FLAG, "Err "},
{PROXY_WORKER_HOT_STANDBY, PROXY_WORKER_HOT_STANDBY_FLAG, "Stby "},
{PROXY_WORKER_HOT_SPARE, PROXY_WORKER_HOT_SPARE_FLAG, "Spar "},
{PROXY_WORKER_FREE, PROXY_WORKER_FREE_FLAG, "Free "},
{PROXY_WORKER_HC_FAIL, PROXY_WORKER_HC_FAIL_FLAG, "HcFl "},
{PROXY_WORKER_BEACON, PROXY_WORKER_BEACON_FLAG, "Bcn "},
{0x0, '\0', NULL}
};
static const char * const proxy_id = "proxy";
apr_global_mutex_t *proxy_mutex = NULL;
/*
* A Web proxy module. Stages:
*
* translate_name: set filename to proxy:<URL>
* map_to_storage: run proxy_walk (rather than directory_walk/file_walk)
* can't trust directory_walk/file_walk since these are
* not in our filesystem. Prevents mod_http from serving
* the TRACE request we will set aside to handle later.
* fix_ups: convert the URL stored in the filename to the
* canonical form.
* handler: handle proxy requests
*/
/* -------------------------------------------------------------- */
/* Translate the URL into a 'filename' */
static const char *set_worker_param(apr_pool_t *p,
server_rec *s,
proxy_worker *worker,
const char *key,
const char *val)
{
int ival;
apr_interval_time_t timeout;
if (!strcasecmp(key, "loadfactor")) {
/* Normalized load factor. Used with BalancerMember,
* it is a number between 1 and 100.
*/
double fval = atof(val);
ival = fval * 100.0;
if (ival < 100 || ival > 10000)
return "LoadFactor must be a number between 1..100";
worker->s->lbfactor = ival;
}
else if (!strcasecmp(key, "retry")) {
/* If set it will give the retry timeout for the worker
* The default value is 60 seconds, meaning that if
* in error state, it will be retried after that timeout.
*/
if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
return "Retry value has wrong format";
if (timeout < 1000)
return "Retry must be at least one millisecond";
worker->s->retry = timeout;
worker->s->retry_set = 1;
}
else if (!strcasecmp(key, "ttl")) {
/* XXX Second granularity is OK */
/* Time in seconds that will destroy all the connections
* that exceed the smax
*/
ival = atoi(val);
if (ival < 1)
return "TTL must be at least one second";
worker->s->ttl = apr_time_from_sec(ival);
}
else if (!strcasecmp(key, "min")) {
/* Initial number of connections to remote
*/
ival = atoi(val);
if (ival < 0)
return "Min must be a positive number";
worker->s->min = ival;
}
else if (!strcasecmp(key, "max")) {
/* Maximum number of connections to remote
*/
ival = atoi(val);
if (ival < 0)
return "Max must be a positive number";
worker->s->hmax = ival;
}
/* XXX: More intelligent naming needed */
else if (!strcasecmp(key, "smax")) {
/* Maximum number of connections to remote that
* will not be destroyed
*/
ival = atoi(val);
if (ival < 0)
return "Smax must be a positive number";
worker->s->smax = ival;
}
else if (!strcasecmp(key, "acquire")) {
/* Acquire timeout in given unit (default is milliseconds).
* If set this will be the maximum time to
* wait for a free connection.
*/
if (ap_timeout_parameter_parse(val, &timeout, "ms") != APR_SUCCESS)
return "Acquire timeout has wrong format";
if (timeout < 1000)
return "Acquire must be at least one millisecond";
worker->s->acquire = timeout;
worker->s->acquire_set = 1;
}
else if (!strcasecmp(key, "timeout")) {
/* Connection timeout in seconds.
* Defaults to server timeout.
*/
if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
return "Timeout value has wrong format";
if (timeout < 1000)
return "Timeout must be at least one millisecond";
worker->s->timeout = timeout;
worker->s->timeout_set = 1;
}
else if (!strcasecmp(key, "iobuffersize")) {
long s = atol(val);
if (s < 512 && s) {
return "IOBufferSize must be >= 512 bytes, or 0 for system default.";
}
worker->s->io_buffer_size = (s ? s : AP_IOBUFSIZE);
worker->s->io_buffer_size_set = 1;
}
else if (!strcasecmp(key, "receivebuffersize")) {
ival = atoi(val);
if (ival < 512 && ival != 0) {
return "ReceiveBufferSize must be >= 512 bytes, or 0 for system default.";
}
worker->s->recv_buffer_size = ival;
worker->s->recv_buffer_size_set = 1;
}
else if (!strcasecmp(key, "keepalive")) {
if (!strcasecmp(val, "on"))
worker->s->keepalive = 1;
else if (!strcasecmp(val, "off"))
worker->s->keepalive = 0;
else
return "KeepAlive must be On|Off";
worker->s->keepalive_set = 1;
}
else if (!strcasecmp(key, "disablereuse")) {
if (!strcasecmp(val, "on"))
worker->s->disablereuse = 1;
else if (!strcasecmp(val, "off"))
worker->s->disablereuse = 0;
else
return "DisableReuse must be On|Off";
worker->s->disablereuse_set = 1;
}
else if (!strcasecmp(key, "enablereuse")) {
if (!strcasecmp(val, "on"))
worker->s->disablereuse = 0;
else if (!strcasecmp(val, "off"))
worker->s->disablereuse = 1;
else
return "EnableReuse must be On|Off";
worker->s->disablereuse_set = 1;
}
else if (!strcasecmp(key, "addressttl")) {
/* Address TTL in seconds
*/
apr_interval_time_t ttl;
if (strcmp(val, "-1") == 0) {
worker->s->address_ttl = -1;
}
else if (ap_timeout_parameter_parse(val, &ttl, "s") == APR_SUCCESS
&& (ttl <= apr_time_from_sec(APR_INT32_MAX))
&& (ttl % apr_time_from_sec(1)) == 0) {
worker->s->address_ttl = apr_time_sec(ttl);
}
else {
return "AddressTTL must be -1 or a number of seconds not "
"exceeding " APR_STRINGIFY(APR_INT32_MAX);
}
worker->s->address_ttl_set = 1;
}
else if (!strcasecmp(key, "route")) {
/* Worker route.
*/
if (strlen(val) >= sizeof(worker->s->route))
return apr_psprintf(p, "Route length must be < %d characters",
(int)sizeof(worker->s->route));
PROXY_STRNCPY(worker->s->route, val);
}
else if (!strcasecmp(key, "redirect")) {
/* Worker redirection route.
*/
if (strlen(val) >= sizeof(worker->s->redirect))
return apr_psprintf(p, "Redirect length must be < %d characters",
(int)sizeof(worker->s->redirect));
PROXY_STRNCPY(worker->s->redirect, val);
}
else if (!strcasecmp(key, "status")) {
const char *v;
int mode = 1;
apr_status_t rv;
/* Worker status.
*/
for (v = val; *v; v++) {
if (*v == '+') {
mode = 1;
v++;
}
else if (*v == '-') {
mode = 0;
v++;
}
rv = ap_proxy_set_wstatus(*v, mode, worker);
if (rv != APR_SUCCESS)
return "Unknown status parameter option";
}
}
else if (!strcasecmp(key, "flushpackets")) {
if (!strcasecmp(val, "on"))
worker->s->flush_packets = flush_on;
else if (!strcasecmp(val, "off"))
worker->s->flush_packets = flush_off;
else if (!strcasecmp(val, "auto"))
worker->s->flush_packets = flush_auto;
else
return "flushpackets must be on|off|auto";
}
else if (!strcasecmp(key, "flushwait")) {
if (ap_timeout_parameter_parse(val, &timeout, "ms") != APR_SUCCESS)
return "flushwait has wrong format";
if (timeout > 1000000 || timeout < 0) {
return "flushwait must be <= 1s, or 0 for system default of 10 millseconds.";
}
if (timeout == 0)
worker->s->flush_wait = PROXY_FLUSH_WAIT;
else
worker->s->flush_wait = timeout;
}
else if (!strcasecmp(key, "ping")) {
/* Ping/Pong timeout in given unit (default is second).
*/
if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
return "Ping/Pong timeout has wrong format";
if (timeout < 1000)
return "Ping/Pong timeout must be at least one millisecond";
worker->s->ping_timeout = timeout;
worker->s->ping_timeout_set = 1;
}
else if (!strcasecmp(key, "lbset")) {
ival = atoi(val);
if (ival < 0 || ival > 99)
return "lbset must be between 0 and 99";
worker->s->lbset = ival;
}
else if (!strcasecmp(key, "connectiontimeout")) {
/* Request timeout in given unit (default is second).
* Defaults to connection timeout
*/
if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
return "Connectiontimeout has wrong format";
if (timeout < 1000)
return "Connectiontimeout must be at least one millisecond.";
worker->s->conn_timeout = timeout;
worker->s->conn_timeout_set = 1;
}
else if (!strcasecmp(key, "flusher")) {
if (PROXY_STRNCPY(worker->s->flusher, val) != APR_SUCCESS) {
return apr_psprintf(p, "flusher name length must be < %d characters",
(int)sizeof(worker->s->flusher));
}
}
else if (!strcasecmp(key, "secret")) {
if (PROXY_STRNCPY(worker->s->secret, val) != APR_SUCCESS) {
return apr_psprintf(p, "Secret length must be < %d characters",
(int)sizeof(worker->s->secret));
}
}
else if (!strcasecmp(key, "upgrade")) {
if (PROXY_STRNCPY(worker->s->upgrade,
strcasecmp(val, "ANY") ? val : "*") != APR_SUCCESS) {
return apr_psprintf(p, "upgrade protocol length must be < %d characters",
(int)sizeof(worker->s->upgrade));
}
}
else if (!strcasecmp(key, "responsefieldsize")) {
long s = atol(val);
if (s < 0) {
return "ResponseFieldSize must be greater than 0 bytes, or 0 for system default.";
}
worker->s->response_field_size = (s ? s : HUGE_STRING_LEN);
worker->s->response_field_size_set = 1;
}
else if (!strcasecmp(key, "multipathtcp")) {
#ifdef IPPROTO_MPTCP
if (!strcasecmp(val, "On"))
worker->s->sock_proto = IPPROTO_MPTCP;
else if (!strcasecmp(val, "Off"))
worker->s->sock_proto = APR_PROTO_TCP;
else
return "multipathtcp must be On|Off";
#else
return "multipathtcp is not supported on your platform";
#endif
}
else {
if (set_worker_hc_param_f) {
return set_worker_hc_param_f(p, s, worker, key, val, NULL);
} else {
return "unknown Worker parameter";
}
}
return NULL;
}
static const char *set_balancer_param(proxy_server_conf *conf,
apr_pool_t *p,
proxy_balancer *balancer,
const char *key,
const char *val)
{
int ival;
apr_interval_time_t timeout;
if (!strcasecmp(key, "stickysession")) {
char *path;
/* Balancer sticky session name.
* Set to something like JSESSIONID or
* PHPSESSIONID, etc..,
*/
if (strlen(val) >= sizeof(balancer->s->sticky_path))
apr_psprintf(p, "stickysession length must be < %d characters",
(int)sizeof(balancer->s->sticky_path));
PROXY_STRNCPY(balancer->s->sticky_path, val);
PROXY_STRNCPY(balancer->s->sticky, val);
if ((path = strchr((char *)balancer->s->sticky, '|'))) {
*path++ = '\0';
PROXY_STRNCPY(balancer->s->sticky_path, path);
}
}
else if (!strcasecmp(key, "stickysessionsep")) {
/* separator/delimiter for sessionid and route,
* normally '.'
*/
if (strlen(val) != 1) {
if (!strcasecmp(val, "off"))
balancer->s->sticky_separator = 0;
else
return "stickysessionsep must be a single character or Off";
}
else
balancer->s->sticky_separator = *val;
balancer->s->sticky_separator_set = 1;
}
else if (!strcasecmp(key, "nofailover")) {
/* If set to 'on' the session will break
* if the worker is in error state or
* disabled.
*/
if (!strcasecmp(val, "on"))
balancer->s->sticky_force = 1;
else if (!strcasecmp(val, "off"))
balancer->s->sticky_force = 0;
else
return "failover must be On|Off";
balancer->s->sticky_force_set = 1;
}
else if (!strcasecmp(key, "timeout")) {
/* Balancer timeout in seconds.
* If set this will be the maximum time to
* wait for a free worker.
* Default is not to wait.
*/
if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
return "Timeout value has wrong format";
if (timeout < 10000)
return "Timeout must be at least ten milliseconds";
balancer->s->timeout = timeout;
}
else if (!strcasecmp(key, "maxattempts")) {
/* Maximum number of failover attempts before
* giving up.
*/
ival = atoi(val);
if (ival < 0)
return "maximum number of attempts must be a positive number";
balancer->s->max_attempts = ival;
balancer->s->max_attempts_set = 1;
}
else if (!strcasecmp(key, "lbmethod")) {
proxy_balancer_method *provider;
if (strlen(val) > (sizeof(balancer->s->lbpname)-1))
return "unknown lbmethod";
provider = ap_lookup_provider(PROXY_LBMETHOD, val, "0");
if (provider) {
balancer->lbmethod = provider;
if (PROXY_STRNCPY(balancer->s->lbpname, val) == APR_SUCCESS) {
balancer->lbmethod_set = 1;
return NULL;
}
else {
return "lbmethod name too large";
}
}
return "unknown lbmethod";
}
else if (!strcasecmp(key, "scolonpathdelim")) {
/* If set to 'on' then ';' will also be
* used as a session path separator/delim (ala
* mod_jk)
*/
if (!strcasecmp(val, "on"))
balancer->s->scolonsep = 1;
else if (!strcasecmp(val, "off"))
balancer->s->scolonsep = 0;
else
return "scolonpathdelim must be On|Off";
balancer->s->scolonsep_set = 1;
}
else if (!strcasecmp(key, "failonstatus")) {
char *val_split;
char *status;
char *tok_state;
val_split = apr_pstrdup(p, val);
balancer->errstatuses = apr_array_make(p, 1, sizeof(int));
status = apr_strtok(val_split, ", ", &tok_state);
while (status != NULL) {
ival = atoi(status);
if (ap_is_HTTP_VALID_RESPONSE(ival)) {
*(int *)apr_array_push(balancer->errstatuses) = ival;
}
else {
return "failonstatus must be one or more HTTP response codes";
}
status = apr_strtok(NULL, ", ", &tok_state);
}
}
else if (!strcasecmp(key, "failontimeout")) {
if (!strcasecmp(val, "on"))
balancer->failontimeout = 1;
else if (!strcasecmp(val, "off"))
balancer->failontimeout = 0;
else
return "failontimeout must be On|Off";
balancer->failontimeout_set = 1;
}
else if (!strcasecmp(key, "nonce")) {
if (!strcasecmp(val, "None")) {
*balancer->s->nonce = '\0';
}
else {
if (PROXY_STRNCPY(balancer->s->nonce, val) != APR_SUCCESS) {
return "Provided nonce is too large";
}
}
balancer->s->nonce_set = 1;
}
else if (!strcasecmp(key, "growth")) {
ival = atoi(val);
if (ival < 1 || ival > 100) /* arbitrary limit here */
return "growth must be between 1 and 100";
balancer->growth = ival;
balancer->growth_set = 1;
}
else if (!strcasecmp(key, "forcerecovery")) {
if (!strcasecmp(val, "on"))
balancer->s->forcerecovery = 1;
else if (!strcasecmp(val, "off"))
balancer->s->forcerecovery = 0;
else
return "forcerecovery must be On|Off";
balancer->s->forcerecovery_set = 1;
}
else {
return "unknown Balancer parameter";
}
return NULL;
}
static int alias_match(const char *uri, const char *alias_fakename)
{
const char *end_fakename = alias_fakename + strlen(alias_fakename);
const char *aliasp = alias_fakename, *urip = uri;
const char *end_uri = uri + strlen(uri);
while (aliasp < end_fakename && urip < end_uri) {
if (*aliasp == '/') {
/* any number of '/' in the alias matches any number in
* the supplied URI, but there must be at least one...
*/
if (*urip != '/')
return 0;
while (*aliasp == '/')
++aliasp;
while (*urip == '/')
++urip;
}
else {
/* Other characters are compared literally */
if (*urip++ != *aliasp++)
return 0;
}
}
/* fixup badly encoded stuff (e.g. % as last character) */
if (aliasp > end_fakename) {
aliasp = end_fakename;
}
if (urip > end_uri) {
urip = end_uri;
}
/* We reach the end of the uri before the end of "alias_fakename"
* for example uri is "/" and alias_fakename "/examples"
*/
if (urip == end_uri && aliasp != end_fakename) {
return 0;
}
/* Check last alias path component matched all the way */
if (aliasp[-1] != '/' && *urip != '\0' && *urip != '/')
return 0;
/* Return number of characters from URI which matched (may be
* greater than length of alias, since we may have matched
* doubled slashes)
*/
return urip - uri;
}
/*
* Inspired by mod_jk's jk_servlet_normalize().
*/
static int alias_match_servlet(apr_pool_t *p,
const char **urip,
const char *alias)
{
char *map;
const char *uri = *urip;
apr_array_header_t *stack;
int map_pos, uri_pos, alias_pos, first_pos;
int alias_depth = 0, depth;
/* Both uri and alias should start with '/' */
if (uri[0] != '/' || alias[0] != '/') {
return 0;
}
stack = apr_array_make(p, 5, sizeof(int));
map = apr_palloc(p, strlen(uri) + 1);
map[0] = '/';
map[1] = '\0';
map_pos = uri_pos = alias_pos = first_pos = 1;
while (uri[uri_pos] != '\0') {
/* Remove path parameters ;foo=bar/ from any path segment */
if (uri[uri_pos] == ';') {
do {
uri_pos++;
} while (uri[uri_pos] != '/' && uri[uri_pos] != '\0');
continue;
}
if (map[map_pos - 1] == '/') {
/* Collapse ///// sequences to / */
if (uri[uri_pos] == '/') {
do {
uri_pos++;
} while (uri[uri_pos] == '/');
continue;
}
if (uri[uri_pos] == '.') {
/* Remove /./ segments */
if (uri[uri_pos + 1] == '/'
|| uri[uri_pos + 1] == ';'
|| uri[uri_pos + 1] == '\0') {
uri_pos++;
if (uri[uri_pos] == '/') {
uri_pos++;
}
continue;
}
/* Remove /xx/../ segments */
if (uri[uri_pos + 1] == '.'
&& (uri[uri_pos + 2] == '/'
|| uri[uri_pos + 2] == ';'
|| uri[uri_pos + 2] == '\0')) {
/* Wind map segment back the previous one */
if (map_pos == 1) {
/* Above root */
return 0;
}
do {
map_pos--;
} while (map[map_pos - 1] != '/');
map[map_pos] = '\0';
/* Wind alias segment back, unless in deeper segment */
if (alias_depth == stack->nelts) {
if (alias[alias_pos] == '\0') {
alias_pos--;
}
while (alias_pos > 0 && alias[alias_pos] == '/') {
alias_pos--;
}
while (alias_pos > 0 && alias[alias_pos - 1] != '/') {
alias_pos--;
}
AP_DEBUG_ASSERT(alias_pos > 0);
alias_depth--;
}
apr_array_pop(stack);
/* Move uri forward to the next segment */
uri_pos += 2;
if (uri[uri_pos] == '/') {
uri_pos++;
}
first_pos = 0;
continue;
}
}
if (first_pos) {
while (uri[first_pos] == '/') {
first_pos++;
}
}
/* New segment */
APR_ARRAY_PUSH(stack, int) = first_pos ? first_pos : uri_pos;
if (alias[alias_pos] != '\0') {
if (alias[alias_pos - 1] != '/') {
/* Remain in pair with uri segments */
do {
alias_pos++;
} while (alias[alias_pos - 1] != '/' && alias[alias_pos]);
}
while (alias[alias_pos] == '/') {
alias_pos++;
}
if (alias[alias_pos] != '\0') {
alias_depth++;
}
}
}
if (alias[alias_pos] != '\0') {
int *match = &APR_ARRAY_IDX(stack, alias_depth - 1, int);
if (*match) {
if (alias[alias_pos] != uri[uri_pos]) {
/* Current segment does not match */
*match = 0;
}
else if (alias[alias_pos + 1] == '\0'
&& alias[alias_pos] != '/') {
if (uri[uri_pos + 1] == ';') {
/* We'll preserve the parameters of the last
* segment if it does not end with '/', so mark
* the match as negative for below handling.
*/
*match = -(uri_pos + 1);
}
else if (uri[uri_pos + 1] != '/'
&& uri[uri_pos + 1] != '\0') {
/* Last segment does not match all the way */
*match = 0;
}
}
}
/* Don't go past the segment if the uri isn't there yet */
if (alias[alias_pos] != '/' || uri[uri_pos] == '/') {
alias_pos++;
}
}
if (uri[uri_pos] == '/') {
first_pos = uri_pos + 1;
}
map[map_pos++] = uri[uri_pos++];
map[map_pos] = '\0';
}
/* Can't reach the end of uri before the end of the alias,
* for example if uri is "/" and alias is "/examples"
*/
if (alias[alias_pos] != '\0') {
return 0;
}
/* Check whether each alias segment matched */
for (depth = 0; depth < alias_depth; ++depth) {
if (!APR_ARRAY_IDX(stack, depth, int)) {
return 0;
}
}
/* If alias_depth == stack->nelts we have a full match, i.e.
* uri == alias so we can return uri_pos as is (the end of uri)
*/
if (alias_depth < stack->nelts) {
/* Return the segment following the alias */
uri_pos = APR_ARRAY_IDX(stack, alias_depth, int);
if (alias_depth) {
/* But if the last segment of the alias does not end with '/'
* and the corresponding segment of the uri has parameters,
* we want to forward those parameters (see above for the
* negative pos trick/mark).
*/
int pos = APR_ARRAY_IDX(stack, alias_depth - 1, int);
if (pos < 0) {
uri_pos = -pos;
}
}
}
/* If the alias lacks a trailing slash, take it from the uri (if any) */
if (alias[alias_pos - 1] != '/' && uri[uri_pos - 1] == '/') {
uri_pos--;
}
*urip = map;
return uri_pos;
}
/* Detect if an absoluteURI should be proxied or not. Note that we
* have to do this during this phase because later phases are
* "short-circuiting"... i.e. translate_names will end when the first
* module returns OK. So for example, if the request is something like:
*
* GET http://othervhost/cgi-bin/printenv HTTP/1.0
*
* mod_alias will notice the /cgi-bin part and ScriptAlias it and
* short-circuit the proxy... just because of the ordering in the
* configuration file.
*/
static int proxy_detect(request_rec *r)
{
void *sconf = r->server->module_config;
proxy_server_conf *conf =
(proxy_server_conf *) ap_get_module_config(sconf, &proxy_module);
/* Ick... msvc (perhaps others) promotes ternary short results to int */
if (conf->req && r->parsed_uri.scheme) {
/* but it might be something vhosted */
if (!r->parsed_uri.hostname
|| ap_cstr_casecmp(r->parsed_uri.scheme, ap_http_scheme(r)) != 0
|| !ap_matches_request_vhost(r, r->parsed_uri.hostname,
(apr_port_t)(r->parsed_uri.port_str
? r->parsed_uri.port
: ap_default_port(r)))) {
r->proxyreq = PROXYREQ_PROXY;
r->uri = r->unparsed_uri;
r->filename = apr_pstrcat(r->pool, "proxy:", r->uri, NULL);
r->handler = "proxy-server";
}
}
/* We need special treatment for CONNECT proxying: it has no scheme part */
else if (conf->req && r->method_number == M_CONNECT
&& r->parsed_uri.hostname
&& r->parsed_uri.port_str) {
r->proxyreq = PROXYREQ_PROXY;
r->uri = r->unparsed_uri;
r->filename = apr_pstrcat(r->pool, "proxy:", r->uri, NULL);
r->handler = "proxy-server";
}
return DECLINED;
}
PROXY_DECLARE(int) ap_proxy_trans_match(request_rec *r, struct proxy_alias *ent,
proxy_dir_conf *dconf)
{
int len;
const char *fake;
const char *real;
ap_regmatch_t regm[AP_MAX_REG_MATCH];
ap_regmatch_t reg1[AP_MAX_REG_MATCH];
char *found = NULL;
int mismatch = 0;
unsigned int nocanon = ent->flags & PROXYPASS_NOCANON;
const char *use_uri = nocanon ? r->unparsed_uri : r->uri;
const char *servlet_uri = NULL;
if (dconf && (dconf->interpolate_env == 1) && (ent->flags & PROXYPASS_INTERPOLATE)) {
fake = ap_proxy_interpolate(r, ent->fake);
real = ap_proxy_interpolate(r, ent->real);
}
else {
fake = ent->fake;
real = ent->real;
}
ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, APLOGNO(03461)
"attempting to match URI path '%s' against %s '%s' for "
"proxying", r->uri, (ent->regex ? "pattern" : "prefix"),
fake);
if (ent->regex) {
if (!ap_regexec(ent->regex, r->uri, AP_MAX_REG_MATCH, regm, 0)) {
if ((real[0] == '!') && (real[1] == '\0')) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03462)
"proxying is explicitly disabled for URI path "
"'%s'; declining", r->uri);
return DECLINED;
}
/* test that we haven't reduced the URI */
if (nocanon && ap_regexec(ent->regex, r->unparsed_uri,
AP_MAX_REG_MATCH, reg1, 0)) {
mismatch = 1;
use_uri = r->uri;
}
found = ap_pregsub(r->pool, real, use_uri, AP_MAX_REG_MATCH,
(use_uri == r->uri) ? regm : reg1);
if (!found) {
ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, APLOGNO(01135)
"Substitution in regular expression failed. "
"Replacement too long?");
return HTTP_INTERNAL_SERVER_ERROR;
}
/* Note: The strcmp() below catches cases where there
* was no regex substitution. This is so cases like:
*
* ProxyPassMatch \.gif balancer://foo
*
* will work "as expected". The upshot is that the 2
* directives below act the exact same way (ie: $1 is implied):
*
* ProxyPassMatch ^(/.*\.gif)$ balancer://foo
* ProxyPassMatch ^(/.*\.gif)$ balancer://foo$1
*
* which may be confusing.
*/
if (strcmp(found, real) != 0) {
found = apr_pstrcat(r->pool, "proxy:", found, NULL);
}
else {
found = apr_pstrcat(r->pool, "proxy:", real, use_uri, NULL);
}
}
}
else {
if ((ent->flags & PROXYPASS_MAP_SERVLET) == PROXYPASS_MAP_SERVLET) {
servlet_uri = r->uri;
len = alias_match_servlet(r->pool, &servlet_uri, fake);
nocanon = 0; /* ignored since servlet's normalization applies */
}
else {
len = alias_match(r->uri, fake);
}
if (len != 0) {
if ((real[0] == '!') && (real[1] == '\0')) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03463)
"proxying is explicitly disabled for URI path "
"'%s'; declining", r->uri);
return DECLINED;
}
if (nocanon && len != alias_match(r->unparsed_uri, fake)) {
mismatch = 1;
use_uri = r->uri;
}
found = apr_pstrcat(r->pool, "proxy:", real, use_uri + len, NULL);
}
}
if (mismatch) {
/* We made a reducing transformation, so we can't safely use
* unparsed_uri. Safe fallback is to ignore nocanon.
*/
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01136)
"Unescaped URL path matched ProxyPass; ignoring unsafe nocanon");
}
if (found) {
unsigned int encoded = ent->flags & PROXYPASS_MAP_ENCODED;
/* A proxy module is assigned this URL, check whether it's interested
* in the request itself (e.g. proxy_wstunnel cares about Upgrade
* requests only, and could hand over to proxy_http otherwise).
*/
int rc = proxy_run_check_trans(r, found + 6);
if (rc != OK && rc != DECLINED) {
return HTTP_CONTINUE;
}
r->filename = found;
r->handler = "proxy-server";
r->proxyreq = PROXYREQ_REVERSE;
if (nocanon && !mismatch) {
/* mod_proxy_http needs to be told. Different module. */
apr_table_setn(r->notes, "proxy-nocanon", "1");
}
if (ent->flags & PROXYPASS_NOQUERY) {
apr_table_setn(r->notes, "proxy-noquery", "1");
}
if (encoded) {
apr_table_setn(r->notes, "proxy-noencode", "1");
}
if (servlet_uri) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(10248)
"Servlet path '%s' (%s) matches proxy handler '%s'",
r->uri, servlet_uri, found);
/* Apply servlet normalization to r->uri so that <Location> or any
* directory context match does not have to handle path parameters.
* We change r->uri in-place so that r->parsed_uri.path is updated
* too. Since normalized servlet_uri is necessarily shorter than
* the original r->uri, strcpy() is fine.
*/
AP_DEBUG_ASSERT(strlen(r->uri) >= strlen(servlet_uri));
strcpy(r->uri, servlet_uri);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03464)
"URI path '%s' matches proxy handler '%s'", r->uri,
found);
}
return (encoded) ? DONE : OK;
}
return HTTP_CONTINUE;
}
static int proxy_trans(request_rec *r, int pre_trans)
{
int i, enc;
struct proxy_alias *ent;
proxy_dir_conf *dconf;
proxy_server_conf *conf;
if (r->proxyreq) {
/* someone has already set up the proxy, it was possibly ourselves
* in proxy_detect (DONE will prevent further decoding of r->uri,
* only if proxyreq is set before pre_trans already).
*/
return pre_trans ? DONE : OK;
}
/* In early pre_trans hook, r->uri was not manipulated yet so we are
* compliant with RFC1945 at this point. Otherwise, it probably isn't
* an issue because this is a hybrid proxy/origin server.
*/
dconf = ap_get_module_config(r->per_dir_config, &proxy_module);
conf = (proxy_server_conf *) ap_get_module_config(r->server->module_config,
&proxy_module);
/* Always and only do PROXY_MAP_ENCODED mapping in pre_trans, when
* r->uri is still encoded, or we might consider for instance that
* a decoded sub-delim is now a delimiter (e.g. "%3B" => ';' for
* path parameters), which it's not.
*/
if ((pre_trans && !conf->map_encoded_one)
|| (!pre_trans && conf->map_encoded_all)) {
/* Fast path, nothing at this stage */
return DECLINED;
}
if ((r->unparsed_uri[0] == '*' && r->unparsed_uri[1] == '\0')
|| !r->uri || r->uri[0] != '/') {
return DECLINED;
}
if (apr_table_get(r->subprocess_env, "no-proxy")) {
return DECLINED;
}
/* short way - this location is reverse proxied? */
if (dconf->alias) {
enc = (dconf->alias->flags & PROXYPASS_MAP_ENCODED) != 0;
if (!(pre_trans ^ enc)) {
int rv = ap_proxy_trans_match(r, dconf->alias, dconf);
if (rv != HTTP_CONTINUE) {
return rv;
}
}
}
/* long way - walk the list of aliases, find a match */
for (i = 0; i < conf->aliases->nelts; i++) {
ent = &((struct proxy_alias *)conf->aliases->elts)[i];
enc = (ent->flags & PROXYPASS_MAP_ENCODED) != 0;
if (!(pre_trans ^ enc)) {
int rv = ap_proxy_trans_match(r, ent, dconf);
if (rv != HTTP_CONTINUE) {
return rv;
}
}
}
return DECLINED;
}
static int proxy_pre_translate_name(request_rec *r)
{
return proxy_trans(r, 1);
}
static int proxy_translate_name(request_rec *r)
{
return proxy_trans(r, 0);
}
static int proxy_walk(request_rec *r)
{
proxy_server_conf *sconf = ap_get_module_config(r->server->module_config,
&proxy_module);
ap_conf_vector_t *per_dir_defaults = r->per_dir_config;
ap_conf_vector_t **sec_proxy = (ap_conf_vector_t **) sconf->sec_proxy->elts;
ap_conf_vector_t *entry_config;
proxy_dir_conf *entry_proxy;
int num_sec = sconf->sec_proxy->nelts;
/* XXX: shouldn't we use URI here? Canonicalize it first?
* Pass over "proxy:" prefix
*/
const char *proxyname = r->filename + 6;
int j;
apr_pool_t *rxpool = NULL;
for (j = 0; j < num_sec; ++j)
{
int nmatch = 0;
int i;
ap_regmatch_t *pmatch = NULL;
entry_config = sec_proxy[j];
entry_proxy = ap_get_module_config(entry_config, &proxy_module);
if (entry_proxy->r) {
if (entry_proxy->refs && entry_proxy->refs->nelts) {
if (!rxpool) {
apr_pool_create(&rxpool, r->pool);
apr_pool_tag(rxpool, "proxy_rxpool");
}
nmatch = entry_proxy->refs->nelts;
pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t));
}
if (ap_regexec(entry_proxy->r, proxyname, nmatch, pmatch, 0)) {
continue;
}
for (i = 0; i < nmatch; i++) {
if (pmatch[i].rm_so >= 0 && pmatch[i].rm_eo >= 0 &&
((const char **)entry_proxy->refs->elts)[i]) {
apr_table_setn(r->subprocess_env,
((const char **)entry_proxy->refs->elts)[i],
apr_pstrndup(r->pool,
proxyname + pmatch[i].rm_so,
pmatch[i].rm_eo - pmatch[i].rm_so));
}
}
}
else if (
/* XXX: What about case insensitive matching ???
* Compare regex, fnmatch or string as appropriate
* If the entry doesn't relate, then continue
*/
entry_proxy->p_is_fnmatch ? apr_fnmatch(entry_proxy->p,
proxyname, 0) :
strncmp(proxyname, entry_proxy->p,
strlen(entry_proxy->p))) {
continue;
}
per_dir_defaults = ap_merge_per_dir_configs(r->pool, per_dir_defaults,
entry_config);
}
r->per_dir_config = per_dir_defaults;
if (rxpool) {
apr_pool_destroy(rxpool);
}
return OK;
}
static int proxy_map_location(request_rec *r)
{
int access_status;
if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0)
return DECLINED;
/* Don't let the core or mod_http map_to_storage hooks handle this,
* We don't need directory/file_walk, and we want to TRACE on our own.
*/
if ((access_status = proxy_walk(r))) {
ap_die(access_status, r);
return access_status;
}
return OK;
}
/* -------------------------------------------------------------- */
/* Fixup the filename */
/*
* Canonicalise the URL
*/
static int proxy_fixup(request_rec *r)
{
if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0)
return DECLINED;
/* XXX: Shouldn't we try this before we run the proxy_walk? */
return ap_proxy_canon_url(r);
}
/* Send a redirection if the request contains a hostname which is not */
/* fully qualified, i.e. doesn't have a domain name appended. Some proxy */
/* servers like Netscape's allow this and access hosts from the local */
/* domain in this case. I think it is better to redirect to a FQDN, since */
/* these will later be found in the bookmarks files. */
/* The "ProxyDomain" directive determines what domain will be appended */
static int proxy_needsdomain(request_rec *r, const char *url, const char *domain)
{
char *nuri;
const char *ref;
/* We only want to worry about GETs */
if (!r->proxyreq || r->method_number != M_GET || !r->parsed_uri.hostname)
return DECLINED;
/* If host does contain a dot already, or it is "localhost", decline */
if (strchr(r->parsed_uri.hostname, '.') != NULL /* has domain, or IPv4 literal */
|| strchr(r->parsed_uri.hostname, ':') != NULL /* IPv6 literal */
|| ap_cstr_casecmp(r->parsed_uri.hostname, "localhost") == 0)
return DECLINED; /* host name has a dot already */
ref = apr_table_get(r->headers_in, "Referer");
/* Reassemble the request, but insert the domain after the host name */
/* Note that the domain name always starts with a dot */
r->parsed_uri.hostname = apr_pstrcat(r->pool, r->parsed_uri.hostname,
domain, NULL);
nuri = apr_uri_unparse(r->pool,
&r->parsed_uri,
APR_URI_UNP_REVEALPASSWORD);
apr_table_setn(r->headers_out, "Location", nuri);
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(01138)
"Domain missing: %s sent to %s%s%s", r->uri,
apr_uri_unparse(r->pool, &r->parsed_uri,
APR_URI_UNP_OMITUSERINFO),
ref ? " from " : "", ref ? ref : "");
return HTTP_MOVED_PERMANENTLY;
}
/* -------------------------------------------------------------- */
/* Invoke handler */
static int proxy_handler(request_rec *r)
{
char *uri, *scheme, *p;
const char *p2;
void *sconf = r->server->module_config;
proxy_server_conf *conf = (proxy_server_conf *)
ap_get_module_config(sconf, &proxy_module);
apr_array_header_t *proxies = conf->proxies;
struct proxy_remote *ents = (struct proxy_remote *) proxies->elts;
int rc = DECLINED, access_status, i;
int direct_connect = 0;
const char *str;
apr_int64_t maxfwd;
proxy_balancer *balancer = NULL;
proxy_worker *worker = NULL;
int attempts = 0, max_attempts = 0;
struct dirconn_entry *list = (struct dirconn_entry *)conf->dirconn->elts;
int saved_status;
/* is this for us? */
if (!r->filename) {
return DECLINED;
}
/* We may have forced the proxy handler via config or .htaccess */
if (!r->proxyreq && r->handler && strncmp(r->handler, "proxy:", 6) == 0) {
char *old_filename = r->filename;
r->proxyreq = PROXYREQ_REVERSE;
r->filename = apr_pstrcat(r->pool, r->handler, r->filename, NULL);
apr_table_setn(r->notes, "proxy-sethandler", "1");
/* Still need to canonicalize r->filename */
rc = ap_proxy_canon_url(r);
if (rc != OK) {
r->filename = old_filename;
r->proxyreq = 0;
}
}
else if (r->proxyreq && strncmp(r->filename, "proxy:", 6) == 0) {
apr_table_unset(r->notes, "proxy-sethandler");
rc = OK;
}
if (rc != OK) {
return rc;
}
uri = r->filename + 6;
p = strchr(uri, ':');
if (p == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01141)
"proxy_handler no URL in %s", r->filename);
return HTTP_BAD_REQUEST;
}
scheme = apr_pstrmemdup(r->pool, uri, p - uri);
/* handle max-forwards / OPTIONS / TRACE */
if ((str = apr_table_get(r->headers_in, "Max-Forwards"))) {
char *end;
maxfwd = apr_strtoi64(str, &end, 10);
if (maxfwd < 0 || maxfwd == APR_INT64_MAX || *end) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(10188)
"Max-Forwards value '%s' could not be parsed", str);
return ap_proxyerror(r, HTTP_BAD_REQUEST,
"Max-Forwards request header could not be parsed");
}
else if (maxfwd == 0) {
switch (r->method_number) {
case M_TRACE: {
int access_status;
r->proxyreq = PROXYREQ_NONE;
access_status = ap_send_http_trace(r);
ap_die(access_status, r);
return OK;
}
case M_OPTIONS: {
int access_status;
r->proxyreq = PROXYREQ_NONE;
access_status = ap_send_http_options(r);
ap_die(access_status, r);
return OK;
}
default: {
return ap_proxyerror(r, HTTP_BAD_REQUEST,
"Max-Forwards has reached zero - proxy loop?");
}
}
}
maxfwd = (maxfwd > 0) ? maxfwd - 1 : 0;
}
else {
/* set configured max-forwards */
maxfwd = conf->maxfwd;
}
if (maxfwd >= 0) {
apr_table_setn(r->headers_in, "Max-Forwards",
apr_psprintf(r->pool, "%" APR_INT64_T_FMT, maxfwd));
}
if (r->method_number == M_TRACE) {
core_server_config *coreconf = (core_server_config *)
ap_get_core_module_config(sconf);
if (coreconf->trace_enable == AP_TRACE_DISABLE)
{
/* Allow "error-notes" string to be printed by ap_send_error_response()
* Note; this goes nowhere, canned error response need an overhaul.
*/
apr_table_setn(r->notes, "error-notes",
"TRACE forbidden by server configuration");
apr_table_setn(r->notes, "verbose-error-to", "*");
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01139)
"TRACE forbidden by server configuration");
return HTTP_METHOD_NOT_ALLOWED;
}
/* Can't test ap_should_client_block, we aren't ready to send
* the client a 100 Continue response till the connection has
* been established
*/
if (coreconf->trace_enable != AP_TRACE_EXTENDED
&& (r->read_length || r->read_chunked || r->remaining))
{
/* Allow "error-notes" string to be printed by ap_send_error_response()
* Note; this goes nowhere, canned error response need an overhaul.
*/
apr_table_setn(r->notes, "error-notes",
"TRACE with request body is not allowed");
apr_table_setn(r->notes, "verbose-error-to", "*");
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01140)
"TRACE with request body is not allowed");
return HTTP_REQUEST_ENTITY_TOO_LARGE;
}
}
/* If the host doesn't have a domain name, add one and redirect. */
if (conf->domain != NULL) {
rc = proxy_needsdomain(r, uri, conf->domain);
if (ap_is_HTTP_REDIRECT(rc))
return HTTP_MOVED_PERMANENTLY;
}
/* Check URI's destination host against NoProxy hosts */
/* Bypass ProxyRemote server lookup if configured as NoProxy */
for (direct_connect = i = 0; i < conf->dirconn->nelts &&
!direct_connect; i++) {
direct_connect = list[i].matcher(&list[i], r);
}
#if DEBUGGING
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
(direct_connect) ? APLOGNO(03231) "NoProxy for %s" : APLOGNO(03232) "UseProxy for %s",
r->uri);
#endif
do {
char *url = uri;
/* Try to obtain the most suitable worker */
access_status = ap_proxy_pre_request(&worker, &balancer, r, conf, &url);
if (access_status != OK) {
/*
* Only return if access_status is not HTTP_SERVICE_UNAVAILABLE
* This gives other modules the chance to hook into the
* request_status hook and decide what to do in this situation.
*/
if (access_status != HTTP_SERVICE_UNAVAILABLE)
return access_status;
/*
* Ensure that balancer is NULL if worker is NULL to prevent
* potential problems in the post_request hook.
*/
if (!worker)
balancer = NULL;
goto cleanup;
}
/* Initialise worker if needed, note the shared area must be initialized by the balancer logic */
if (balancer) {
ap_proxy_initialize_worker(worker, r->server, conf->pool);
}
if (balancer && balancer->s->max_attempts_set && !max_attempts)
max_attempts = balancer->s->max_attempts;
/* firstly, try a proxy, unless a NoProxy directive is active */
if (!direct_connect) {
for (i = 0; i < proxies->nelts; i++) {
p2 = ap_strchr_c(ents[i].scheme, ':'); /* is it a partial URL? */
if (strcmp(ents[i].scheme, "*") == 0 ||
(ents[i].use_regex &&
ap_regexec(ents[i].regexp, url, 0, NULL, 0) == 0) ||
(p2 == NULL && ap_cstr_casecmp(scheme, ents[i].scheme) == 0) ||
(p2 != NULL &&
ap_cstr_casecmpn(url, ents[i].scheme,
strlen(ents[i].scheme)) == 0)) {
/* handle the scheme */
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01142)
"Trying to run scheme_handler against proxy");
if (ents[i].creds) {
apr_table_set(r->notes, "proxy-basic-creds", ents[i].creds);
ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r,
"Using proxy auth creds %s", ents[i].creds);
}
access_status = proxy_run_scheme_handler(r, worker,
conf, url,
ents[i].hostname,
ents[i].port);
if (ents[i].creds) apr_table_unset(r->notes, "proxy-basic-creds");
/* Did the scheme handler process the request? */
if (access_status != DECLINED) {
const char *cl_a;
apr_off_t cl;
/*
* An fatal error or success, so no point in
* retrying with a direct connection.
*/
if (access_status != HTTP_BAD_GATEWAY) {
goto cleanup;
}
cl_a = apr_table_get(r->headers_in, "Content-Length");
if (cl_a && (!ap_parse_strict_length(&cl, cl_a)
|| cl > 0)) {
/*
* The request body is of length > 0. We cannot
* retry with a direct connection since we already
* sent (parts of) the request body to the proxy
* and do not have any longer.
*/
goto cleanup;
}
/*
* Transfer-Encoding was set as input header, so we had
* a request body. We cannot retry with a direct
* connection for the same reason as above.
*/
if (apr_table_get(r->headers_in, "Transfer-Encoding")) {
goto cleanup;
}
}
}
}
}
/* otherwise, try it direct */
/* N.B. what if we're behind a firewall, where we must use a proxy or
* give up??
*/
/* handle the scheme */
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01143)
"Running scheme %s handler (attempt %d)",
scheme, attempts);
AP_PROXY_RUN(r, worker, conf, url, attempts);
access_status = proxy_run_scheme_handler(r, worker, conf,
url, NULL, 0);
if (access_status == OK
|| apr_table_get(r->notes, "proxy-error-override"))
break;
else if (access_status == HTTP_INTERNAL_SERVER_ERROR) {
/* Unrecoverable server error.
* We can not failover to another worker.
* Mark the worker as unusable if member of load balancer
*/
if (balancer
&& !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) {
ap_proxy_set_wstatus(PROXY_WORKER_IN_ERROR_FLAG, 1, worker);
worker->s->error_time = apr_time_now();
}
break;
}
else if (access_status == HTTP_SERVICE_UNAVAILABLE) {
/* Recoverable server error.
* We can failover to another worker
* Mark the worker as unusable if member of load balancer
*/
if (balancer
&& !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) {
ap_proxy_set_wstatus(PROXY_WORKER_IN_ERROR_FLAG, 1, worker);
worker->s->error_time = apr_time_now();
}
}
else {
/* Unrecoverable error.
* Return the origin status code to the client.
*/
break;
}
/* Try again if the worker is unusable and the service is
* unavailable.
*/
} while (!PROXY_WORKER_IS_USABLE(worker) &&
max_attempts > attempts++);
if (DECLINED == access_status) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01144)
"No protocol handler was valid for the URL %s "
"(scheme '%s'). "
"If you are using a DSO version of mod_proxy, make sure "
"the proxy submodules are included in the configuration "
"using LoadModule.", r->uri, scheme);
access_status = HTTP_INTERNAL_SERVER_ERROR;
goto cleanup;
}
cleanup:
/*
* Save current r->status and set it to the value of access_status which
* might be different (e.g. r->status could be HTTP_OK if e.g. we override
* the error page on the proxy or if the error was not generated by the
* backend itself but by the proxy e.g. a bad gateway) in order to give
* ap_proxy_post_request a chance to act correctly on the status code.
* But only do the above if access_status is not OK and not DONE, because
* in this case r->status might contain the true status and overwriting
* it with OK or DONE would be wrong.
*/
if ((access_status != OK) && (access_status != DONE)) {
saved_status = r->status;
r->status = access_status;
ap_proxy_post_request(worker, balancer, r, conf);
/*
* Only restore r->status if it has not been changed by
* ap_proxy_post_request as we assume that this change was intentional.
*/
if (r->status == access_status) {
r->status = saved_status;
}
}
else {
ap_proxy_post_request(worker, balancer, r, conf);
}
proxy_run_request_status(&access_status, r);
AP_PROXY_RUN_FINISHED(r, attempts, access_status);
return access_status;
}
/* -------------------------------------------------------------- */
/* Setup configurable data */
static void * create_proxy_config(apr_pool_t *p, server_rec *s)
{
proxy_server_conf *ps = apr_pcalloc(p, sizeof(proxy_server_conf));
ps->sec_proxy = apr_array_make(p, 10, sizeof(ap_conf_vector_t *));
ps->proxies = apr_array_make(p, 10, sizeof(struct proxy_remote));
ps->aliases = apr_array_make(p, 10, sizeof(struct proxy_alias));
ps->noproxies = apr_array_make(p, 10, sizeof(struct noproxy_entry));
ps->dirconn = apr_array_make(p, 10, sizeof(struct dirconn_entry));
ps->workers = apr_array_make(p, 10, sizeof(proxy_worker));
ps->balancers = apr_array_make(p, 10, sizeof(proxy_balancer));
ps->forward = NULL;
ps->reverse = NULL;
ps->domain = NULL;
ps->map_encoded_one = 0;
ps->map_encoded_all = 1;
ps->id = apr_psprintf(p, "p%x", 1); /* simply for storage size */
ps->viaopt = via_off; /* initially backward compatible with 1.3.1 */
ps->viaopt_set = 0; /* 0 means default */
ps->req = 0;
ps->max_balancers = 0;
ps->bal_persist = 0;
ps->inherit = 1;
ps->inherit_set = 0;
ps->ppinherit = 1;
ps->ppinherit_set = 0;
ps->bgrowth = 5;
ps->bgrowth_set = 0;
ps->req_set = 0;
ps->recv_buffer_size = 0; /* this default was left unset for some reason */
ps->recv_buffer_size_set = 0;
ps->io_buffer_size = AP_IOBUFSIZE;
ps->io_buffer_size_set = 0;
ps->maxfwd = DEFAULT_MAX_FORWARDS;
ps->maxfwd_set = 0;
ps->timeout = 0;
ps->timeout_set = 0;
ps->badopt = bad_error;
ps->badopt_set = 0;
ps->source_address = NULL;
ps->source_address_set = 0;
apr_pool_create_ex(&ps->pool, p, NULL, NULL);
apr_pool_tag(ps->pool, "proxy_server_conf");
return ps;
}
static apr_array_header_t *merge_balancers(apr_pool_t *p,
apr_array_header_t *base,
apr_array_header_t *overrides)
{
proxy_balancer *b1;
proxy_balancer *b2;
proxy_balancer tmp;
int x, y, found;
apr_array_header_t *tocopy = apr_array_make(p, 1, sizeof(proxy_balancer));
/* Check if the balancer is defined in both override and base configs:
* a) If it is, Create copy of base balancer and change the configuration
* which can be changed by ProxyPass.
* b) Otherwise, copy the balancer to tocopy array and merge it later.
*/
b1 = (proxy_balancer *) base->elts;
for (y = 0; y < base->nelts; y++) {
b2 = (proxy_balancer *) overrides->elts;
for (x = 0, found = 0; x < overrides->nelts; x++) {
if (b1->hash.def == b2->hash.def && b1->hash.fnv == b2->hash.fnv) {
tmp = *b2;
*b2 = *b1;
b2->s = tmp.s;
/* For shared memory entries, b2->s belongs to override
* balancer, so if some entry is not set there, we have to
* update it according to the base balancer. */
if (*b2->s->sticky == 0 && *b1->s->sticky) {
PROXY_STRNCPY(b2->s->sticky_path, b1->s->sticky_path);
PROXY_STRNCPY(b2->s->sticky, b1->s->sticky);
}
if (!b2->s->sticky_separator_set
&& b1->s->sticky_separator_set) {
b2->s->sticky_separator_set = b1->s->sticky_separator_set;
b2->s->sticky_separator = b1->s->sticky_separator;
}
if (!b2->s->timeout && b1->s->timeout) {
b2->s->timeout = b1->s->timeout;
}
if (!b2->s->max_attempts_set && b1->s->max_attempts_set) {
b2->s->max_attempts_set = b1->s->max_attempts_set;
b2->s->max_attempts = b1->s->max_attempts;
}
if (!b2->s->nonce_set && b1->s->nonce_set) {
b2->s->nonce_set = b1->s->nonce_set;
PROXY_STRNCPY(b2->s->nonce, b1->s->nonce);
}
if (!b2->s->sticky_force_set && b1->s->sticky_force_set) {
b2->s->sticky_force_set = b1->s->sticky_force_set;
b2->s->sticky_force = b1->s->sticky_force;
}
if (!b2->s->scolonsep_set && b1->s->scolonsep_set) {
b2->s->scolonsep_set = b1->s->scolonsep_set;
b2->s->scolonsep = b1->s->scolonsep;
}
if (!b2->s->forcerecovery_set && b1->s->forcerecovery_set) {
b2->s->forcerecovery_set = b1->s->forcerecovery_set;
b2->s->forcerecovery = b1->s->forcerecovery;
}
/* For non-shared memory entries, b2 is copy of b1, so we have
* to use tmp copy of b1 to detect changes done in override. */
if (tmp.lbmethod_set) {
b2->lbmethod_set = tmp.lbmethod_set;
b2->lbmethod = tmp.lbmethod;
}
if (tmp.growth_set) {
b2->growth_set = tmp.growth_set;
b2->growth = tmp.growth;
}
if (tmp.failontimeout_set) {
b2->failontimeout_set = tmp.failontimeout_set;
b2->failontimeout = tmp.failontimeout;
}
if (!apr_is_empty_array(tmp.errstatuses)) {
apr_array_cat(tmp.errstatuses, b2->errstatuses);
b2->errstatuses = tmp.errstatuses;
}
found = 1;
break;
}
b2++;
}
if (!found) {
*(proxy_balancer *)apr_array_push(tocopy) = *b1;
}
b1++;
}
return apr_array_append(p, tocopy, overrides);
}
static void * merge_proxy_config(apr_pool_t *p, void *basev, void *overridesv)
{
proxy_server_conf *ps = apr_pcalloc(p, sizeof(proxy_server_conf));
proxy_server_conf *base = (proxy_server_conf *) basev;
proxy_server_conf *overrides = (proxy_server_conf *) overridesv;
ps->inherit = (overrides->inherit_set == 0) ? base->inherit : overrides->inherit;
ps->inherit_set = overrides->inherit_set || base->inherit_set;
ps->ppinherit = (overrides->ppinherit_set == 0) ? base->ppinherit : overrides->ppinherit;
ps->ppinherit_set = overrides->ppinherit_set || base->ppinherit_set;
if (ps->ppinherit) {
ps->proxies = apr_array_append(p, base->proxies, overrides->proxies);
}
else {
ps->proxies = overrides->proxies;
}
ps->sec_proxy = apr_array_append(p, base->sec_proxy, overrides->sec_proxy);
ps->aliases = apr_array_append(p, base->aliases, overrides->aliases);
ps->noproxies = apr_array_append(p, base->noproxies, overrides->noproxies);
ps->dirconn = apr_array_append(p, base->dirconn, overrides->dirconn);
if (ps->inherit || ps->ppinherit) {
ps->workers = apr_array_append(p, base->workers, overrides->workers);
ps->balancers = merge_balancers(p, base->balancers, overrides->balancers);
}
else {
ps->workers = overrides->workers;
ps->balancers = overrides->balancers;
}
ps->forward = overrides->forward ? overrides->forward : base->forward;
ps->reverse = overrides->reverse ? overrides->reverse : base->reverse;
ps->map_encoded_one = overrides->map_encoded_one || base->map_encoded_one;
ps->map_encoded_all = overrides->map_encoded_all && base->map_encoded_all;
ps->domain = (overrides->domain == NULL) ? base->domain : overrides->domain;
ps->id = (overrides->id == NULL) ? base->id : overrides->id;
ps->viaopt = (overrides->viaopt_set == 0) ? base->viaopt : overrides->viaopt;
ps->viaopt_set = overrides->viaopt_set || base->viaopt_set;
ps->req = (overrides->req_set == 0) ? base->req : overrides->req;
ps->req_set = overrides->req_set || base->req_set;
ps->bgrowth = (overrides->bgrowth_set == 0) ? base->bgrowth : overrides->bgrowth;
ps->bgrowth_set = overrides->bgrowth_set || base->bgrowth_set;
ps->max_balancers = overrides->max_balancers || base->max_balancers;
ps->bal_persist = overrides->bal_persist;
ps->recv_buffer_size = (overrides->recv_buffer_size_set == 0) ? base->recv_buffer_size : overrides->recv_buffer_size;
ps->recv_buffer_size_set = overrides->recv_buffer_size_set || base->recv_buffer_size_set;
ps->io_buffer_size = (overrides->io_buffer_size_set == 0) ? base->io_buffer_size : overrides->io_buffer_size;
ps->io_buffer_size_set = overrides->io_buffer_size_set || base->io_buffer_size_set;
ps->maxfwd = (overrides->maxfwd_set == 0) ? base->maxfwd : overrides->maxfwd;
ps->maxfwd_set = overrides->maxfwd_set || base->maxfwd_set;
ps->timeout = (overrides->timeout_set == 0) ? base->timeout : overrides->timeout;
ps->timeout_set = overrides->timeout_set || base->timeout_set;
ps->badopt = (overrides->badopt_set == 0) ? base->badopt : overrides->badopt;
ps->badopt_set = overrides->badopt_set || base->badopt_set;
ps->proxy_status = (overrides->proxy_status_set == 0) ? base->proxy_status : overrides->proxy_status;
ps->proxy_status_set = overrides->proxy_status_set || base->proxy_status_set;
ps->source_address = (overrides->source_address_set == 0) ? base->source_address : overrides->source_address;
ps->source_address_set = overrides->source_address_set || base->source_address_set;
ps->pool = base->pool;
return ps;
}
static const char *set_source_address(cmd_parms *parms, void *dummy,
const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
struct apr_sockaddr_t *addr;
if (APR_SUCCESS == apr_sockaddr_info_get(&addr, arg, APR_UNSPEC, 0, 0,
psf->pool)) {
psf->source_address = addr;
psf->source_address_set = 1;
}
else {
return "ProxySourceAddress invalid value";
}
return NULL;
}
static void *create_proxy_dir_config(apr_pool_t *p, char *dummy)
{
proxy_dir_conf *new =
(proxy_dir_conf *) apr_pcalloc(p, sizeof(proxy_dir_conf));
/* Filled in by proxysection, when applicable */
/* Put these in the dir config so they work inside <Location> */
new->raliases = apr_array_make(p, 10, sizeof(struct proxy_alias));
new->cookie_paths = apr_array_make(p, 10, sizeof(struct proxy_alias));
new->cookie_domains = apr_array_make(p, 10, sizeof(struct proxy_alias));
new->error_override_codes = apr_array_make(p, 10, sizeof(int));
new->preserve_host_set = 0;
new->preserve_host = 0;
new->interpolate_env = -1; /* unset */
new->error_override = 0;
new->error_override_set = 0;
new->add_forwarded_headers = 1;
new->add_forwarded_headers_set = 0;
new->forward_100_continue = 1;
new->forward_100_continue_set = 0;
new->async_delay = -1;
return (void *) new;
}
static int int_order(const void *i1, const void *i2)
{
return *(const int *)i1 - *(const int *)i2;
}
static void *merge_proxy_dir_config(apr_pool_t *p, void *basev, void *addv)
{
proxy_dir_conf *new = (proxy_dir_conf *) apr_pcalloc(p, sizeof(proxy_dir_conf));
proxy_dir_conf *add = (proxy_dir_conf *) addv;
proxy_dir_conf *base = (proxy_dir_conf *) basev;
new->p = add->p;
new->p_is_fnmatch = add->p_is_fnmatch;
new->r = add->r;
new->refs = add->refs;
/* Put these in the dir config so they work inside <Location> */
new->raliases = apr_array_append(p, base->raliases, add->raliases);
new->cookie_paths
= apr_array_append(p, base->cookie_paths, add->cookie_paths);
new->cookie_domains
= apr_array_append(p, base->cookie_domains, add->cookie_domains);
new->error_override_codes
= apr_array_append(p, base->error_override_codes, add->error_override_codes);
/* Keep the array sorted for binary search (since "base" and "add" are
* already sorted, it's only needed only if both are merged).
*/
if (base->error_override_codes->nelts
&& add->error_override_codes->nelts) {
qsort(new->error_override_codes->elts,
new->error_override_codes->nelts,
sizeof(int), int_order);
}
new->interpolate_env = (add->interpolate_env == -1) ? base->interpolate_env
: add->interpolate_env;
new->preserve_host = (add->preserve_host_set == 0) ? base->preserve_host
: add->preserve_host;
new->preserve_host_set = add->preserve_host_set || base->preserve_host_set;
new->error_override = (add->error_override_set == 0) ? base->error_override
: add->error_override;
new->error_override_set = add->error_override_set || base->error_override_set;
new->alias = (add->alias_set == 0) ? base->alias : add->alias;
new->alias_set = add->alias_set || base->alias_set;
new->add_forwarded_headers =
(add->add_forwarded_headers_set == 0) ? base->add_forwarded_headers
: add->add_forwarded_headers;
new->add_forwarded_headers_set = add->add_forwarded_headers_set
|| base->add_forwarded_headers_set;
new->forward_100_continue =
(add->forward_100_continue_set == 0) ? base->forward_100_continue
: add->forward_100_continue;
new->forward_100_continue_set = add->forward_100_continue_set
|| base->forward_100_continue_set;
new->async_delay =
(add->async_delay_set == 0) ? base->async_delay
: add->async_delay;
new->async_delay_set = add->async_delay_set
|| base->async_delay_set;
new->async_idle_timeout =
(add->async_idle_timeout_set == 0) ? base->async_idle_timeout
: add->async_idle_timeout;
new->async_idle_timeout_set = add->async_idle_timeout_set
|| base->async_idle_timeout_set;
return new;
}
static const char *add_proxy(cmd_parms *cmd, void *dummy, const char *f1,
const char *r1, const char *creds, int regex)
{
server_rec *s = cmd->server;
proxy_server_conf *conf =
(proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module);
struct proxy_remote *new;
char *p, *q;
char *r, *f, *scheme;
ap_regex_t *reg = NULL;
int port;
r = apr_pstrdup(cmd->pool, r1);
scheme = apr_pstrdup(cmd->pool, r1);
f = apr_pstrdup(cmd->pool, f1);
p = strchr(r, ':');
if (p == NULL || p[1] != '/' || p[2] != '/' || p[3] == '\0') {
if (regex)
return "ProxyRemoteMatch: Bad syntax for a remote proxy server";
else
return "ProxyRemote: Bad syntax for a remote proxy server";
}
else {
scheme[p-r] = 0;
}
q = strchr(p + 3, ':');
if (q != NULL) {
if (sscanf(q + 1, "%u", &port) != 1 || port > 65535) {
if (regex)
return "ProxyRemoteMatch: Bad syntax for a remote proxy server (bad port number)";
else
return "ProxyRemote: Bad syntax for a remote proxy server (bad port number)";
}
*q = '\0';
}
else
port = -1;
*p = '\0';
if (regex) {
reg = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED);
if (!reg)
return "Regular expression for ProxyRemoteMatch could not be compiled.";
}
else
if (strchr(f, ':') == NULL)
ap_str_tolower(f); /* lowercase scheme */
ap_str_tolower(p + 3); /* lowercase hostname */
if (port == -1) {
port = apr_uri_port_of_scheme(scheme);
}
new = apr_array_push(conf->proxies);
new->scheme = f;
new->protocol = r;
new->hostname = p + 3;
new->port = port;
new->regexp = reg;
new->use_regex = regex;
if (creds) {
new->creds = apr_pstrcat(cmd->pool, "Basic ",
ap_pbase64encode(cmd->pool, (char *)creds),
NULL);
}
return NULL;
}
static const char *add_proxy_noregex(cmd_parms *cmd, void *dummy, const char *f1,
const char *r1, const char *creds)
{
return add_proxy(cmd, dummy, f1, r1, creds, 0);
}
static const char *add_proxy_regex(cmd_parms *cmd, void *dummy, const char *f1,
const char *r1, const char *creds)
{
return add_proxy(cmd, dummy, f1, r1, creds, 1);
}
PROXY_DECLARE(const char *) ap_proxy_de_socketfy(apr_pool_t *p, const char *url)
{
const char *ptr;
/*
* We could be passed a URL during the config stage that contains
* the UDS path... ignore it
*/
if (!ap_cstr_casecmpn(url, "unix:", 5) &&
((ptr = ap_strchr_c(url + 5, '|')) != NULL)) {
/* move past the 'unix:...|' UDS path info */
const char *ret, *c;
ret = ptr + 1;
/* special cases: "unix:...|scheme:" ind "unix:...|scheme://" are OK,
* expand to "unix:....|scheme://localhost"
*/
c = ap_strchr_c(ret, ':');
if (c == NULL) {
return NULL;
}
if (c[1] == '\0') {
return apr_pstrcat(p, ret, "//localhost", NULL);
}
else if (c[1] == '/' && c[2] == '/' && !c[3]) {
return apr_pstrcat(p, ret, "localhost", NULL);
}
else {
return ret;
}
}
return url;
}
static const char *
add_pass(cmd_parms *cmd, void *dummy, const char *arg, int is_regex)
{
proxy_dir_conf *dconf = (proxy_dir_conf *)dummy;
server_rec *s = cmd->server;
proxy_server_conf *conf =
(proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module);
struct proxy_alias *new;
char *f = cmd->path;
char *r = NULL;
const char *real;
char *word;
apr_table_t *params = apr_table_make(cmd->pool, 5);
const apr_array_header_t *arr;
const apr_table_entry_t *elts;
int i;
unsigned int worker_type = (is_regex) ? AP_PROXY_WORKER_IS_MATCH
: AP_PROXY_WORKER_IS_PREFIX;
unsigned int flags = 0;
const char *err;
err = ap_check_cmd_context(cmd, NOT_IN_DIRECTORY|NOT_IN_FILES);
if (err) {
return err;
}
while (*arg) {
word = ap_getword_conf(cmd->pool, &arg);
if (!f) {
if (!strcmp(word, "~")) {
if (is_regex) {
return "ProxyPassMatch invalid syntax ('~' usage).";
}
worker_type = AP_PROXY_WORKER_IS_MATCH;
continue;
}
f = word;
}
else if (!r) {
r = word;
}
else if (!strcasecmp(word,"nocanon")) {
flags |= PROXYPASS_NOCANON;
}
else if (!strcasecmp(word,"interpolate")) {
flags |= PROXYPASS_INTERPOLATE;
}
else if (!strcasecmp(word,"noquery")) {
flags |= PROXYPASS_NOQUERY;
}
else {
char *val = strchr(word, '=');
if (!val) {
if (cmd->path) {
if (*r == '/') {
return "ProxyPass|ProxyPassMatch can not have a path when defined in "
"a location.";
}
else {
return "Invalid ProxyPass|ProxyPassMatch parameter. Parameter must "
"be in the form 'key=value'.";
}
}
else {
return "Invalid ProxyPass|ProxyPassMatch parameter. Parameter must be "
"in the form 'key=value'.";
}
}
else {
*val++ = '\0';
}
if (!strcasecmp(word, "mapping")) {
if (!strcasecmp(val, "encoded")) {
flags |= PROXYPASS_MAP_ENCODED;
}
else if (!strcasecmp(val, "servlet")) {
flags |= PROXYPASS_MAP_SERVLET;
}
else {
return "unknown mapping";
}
}
else {
apr_table_setn(params, word, val);
}
}
}
if (flags & PROXYPASS_MAP_ENCODED) {
conf->map_encoded_one = 1;
}
else {
conf->map_encoded_all = 0;
}
if (r == NULL) {
return "ProxyPass|ProxyPassMatch needs a path when not defined in a location";
}
if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, r))) {
return "ProxyPass|ProxyPassMatch uses an invalid \"unix:\" URL";
}
/* if per directory, save away the single alias */
if (cmd->path) {
dconf->alias = apr_pcalloc(cmd->pool, sizeof(struct proxy_alias));
dconf->alias_set = 1;
new = dconf->alias;
if (apr_fnmatch_test(f)) {
worker_type = AP_PROXY_WORKER_IS_MATCH;
}
}
/* if per server, add to the alias array */
else {
new = apr_array_push(conf->aliases);
}
new->fake = apr_pstrdup(cmd->pool, f);
new->real = apr_pstrdup(cmd->pool, real);
new->flags = flags;
if (worker_type & AP_PROXY_WORKER_IS_MATCH) {
new->regex = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED);
if (new->regex == NULL)
return "Regular expression could not be compiled.";
}
else {
new->regex = NULL;
}
if (r[0] == '!' && r[1] == '\0')
return NULL;
arr = apr_table_elts(params);
elts = (const apr_table_entry_t *)arr->elts;
/* Distinguish the balancer from worker */
if (ap_proxy_valid_balancer_name(r, 9)) {
proxy_balancer *balancer = ap_proxy_get_balancer(cmd->pool, conf, r, 0);
char *fake_copy;
/*
* In the regex case supplying a fake URL doesn't make sense as it
* cannot be parsed anyway with apr_uri_parse later on in
* ap_proxy_define_balancer / ap_proxy_update_balancer
*/
if (worker_type & AP_PROXY_WORKER_IS_MATCH) {
fake_copy = NULL;
}
else {
fake_copy = f;
}
if (!balancer) {
const char *err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, r, fake_copy, 0);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
}
else {
ap_proxy_update_balancer(cmd->pool, balancer, fake_copy);
}
for (i = 0; i < arr->nelts; i++) {
const char *err = set_balancer_param(conf, cmd->pool, balancer, elts[i].key,
elts[i].val);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
}
new->balancer = balancer;
}
else {
int reuse = 0;
proxy_worker *worker = ap_proxy_get_worker_ex(cmd->temp_pool, NULL,
conf, new->real,
worker_type);
if (!worker) {
const char *err;
err = ap_proxy_define_worker_ex(cmd->pool, &worker, NULL,
conf, r, worker_type);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
PROXY_COPY_CONF_PARAMS(worker, conf);
}
else {
reuse = 1;
ap_log_error(APLOG_MARK, APLOG_INFO, 0, cmd->server, APLOGNO(01145)
"Sharing worker '%s' instead of creating new worker '%s'",
ap_proxy_worker_get_name(worker), new->real);
}
for (i = 0; i < arr->nelts; i++) {
if (reuse) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(01146)
"Ignoring parameter '%s=%s' for worker '%s' because of worker sharing",
elts[i].key, elts[i].val, ap_proxy_worker_get_name(worker));
} else {
const char *err = set_worker_param(cmd->pool, s, worker, elts[i].key,
elts[i].val);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
}
}
}
return NULL;
}
static const char *
add_pass_noregex(cmd_parms *cmd, void *dummy, const char *arg)
{
return add_pass(cmd, dummy, arg, 0);
}
static const char *
add_pass_regex(cmd_parms *cmd, void *dummy, const char *arg)
{
return add_pass(cmd, dummy, arg, 1);
}
static const char * add_pass_reverse(cmd_parms *cmd, void *dconf, const char *f,
const char *r, const char *i)
{
proxy_dir_conf *conf = dconf;
struct proxy_alias *new;
const char *fake;
const char *real;
const char *interp;
const char *err;
err = ap_check_cmd_context(cmd, NOT_IN_DIRECTORY|NOT_IN_FILES);
if (err) {
return err;
}
if (cmd->path == NULL) {
if (r == NULL || !strcasecmp(r, "interpolate")) {
return "ProxyPassReverse needs a path when not defined in a location";
}
fake = f;
real = r;
interp = i;
}
else {
if (r && strcasecmp(r, "interpolate")) {
return "ProxyPassReverse can not have a path when defined in a location";
}
fake = cmd->path;
real = f;
interp = r;
}
new = apr_array_push(conf->raliases);
new->fake = fake;
new->real = real;
new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
return NULL;
}
static const char* cookie_path(cmd_parms *cmd, void *dconf, const char *f,
const char *r, const char *interp)
{
proxy_dir_conf *conf = dconf;
struct proxy_alias *new;
new = apr_array_push(conf->cookie_paths);
new->fake = f;
new->real = r;
new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
return NULL;
}
static const char* cookie_domain(cmd_parms *cmd, void *dconf, const char *f,
const char *r, const char *interp)
{
proxy_dir_conf *conf = dconf;
struct proxy_alias *new;
new = apr_array_push(conf->cookie_domains);
new->fake = f;
new->real = r;
new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
return NULL;
}
static const char *
set_proxy_exclude(cmd_parms *parms, void *dummy, const char *arg)
{
server_rec *s = parms->server;
proxy_server_conf *conf =
ap_get_module_config(s->module_config, &proxy_module);
struct noproxy_entry *new;
struct noproxy_entry *list = (struct noproxy_entry *) conf->noproxies->elts;
struct apr_sockaddr_t *addr;
int found = 0;
int i;
/* Don't duplicate entries */
for (i = 0; i < conf->noproxies->nelts; i++) {
if (strcasecmp(arg, list[i].name) == 0) { /* ignore case for host names */
found = 1;
break;
}
}
if (!found) {
new = apr_array_push(conf->noproxies);
new->name = arg;
if (APR_SUCCESS == apr_sockaddr_info_get(&addr, new->name, APR_UNSPEC, 0, 0, parms->pool)) {
new->addr = addr;
}
else {
new->addr = NULL;
}
}
return NULL;
}
/* Similar to set_proxy_exclude(), but defining directly connected hosts,
* which should never be accessed via the configured ProxyRemote servers
*/
static const char *
set_proxy_dirconn(cmd_parms *parms, void *dummy, const char *arg)
{
server_rec *s = parms->server;
proxy_server_conf *conf =
ap_get_module_config(s->module_config, &proxy_module);
struct dirconn_entry *New;
struct dirconn_entry *list = (struct dirconn_entry *) conf->dirconn->elts;
int found = 0;
int i;
/* Don't duplicate entries */
for (i = 0; i < conf->dirconn->nelts; i++) {
if (strcasecmp(arg, list[i].name) == 0) {
found = 1;
break;
}
}
if (!found) {
New = apr_array_push(conf->dirconn);
New->name = apr_pstrdup(parms->pool, arg);
New->hostaddr = NULL;
if (ap_proxy_is_ipaddr(New, parms->pool)) {
#if DEBUGGING
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03018)
"Parsed addr %s", inet_ntoa(New->addr));
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03019)
"Parsed mask %s", inet_ntoa(New->mask));
#endif
}
else if (ap_proxy_is_domainname(New, parms->pool)) {
ap_str_tolower(New->name);
#if DEBUGGING
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03020)
"Parsed domain %s", New->name);
#endif
}
else if (ap_proxy_is_hostname(New, parms->pool)) {
ap_str_tolower(New->name);
#if DEBUGGING
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03021)
"Parsed host %s", New->name);
#endif
}
else {
ap_proxy_is_word(New, parms->pool);
#if DEBUGGING
fprintf(stderr, "Parsed word %s\n", New->name);
#endif
}
}
return NULL;
}
static const char *
set_proxy_domain(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
if (arg[0] != '.')
return "ProxyDomain: domain name must start with a dot.";
psf->domain = arg;
return NULL;
}
static const char *
set_proxy_req(cmd_parms *parms, void *dummy, int flag)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
psf->req = flag;
psf->req_set = 1;
return NULL;
}
static const char *
set_proxy_error_override(cmd_parms *parms, void *dconf, const char *arg)
{
proxy_dir_conf *conf = dconf;
if (strcasecmp(arg, "Off") == 0) {
conf->error_override = 0;
conf->error_override_set = 1;
}
else if (strcasecmp(arg, "On") == 0) {
conf->error_override = 1;
conf->error_override_set = 1;
}
else if (conf->error_override_set == 1) {
int *newcode;
int argcode, i;
if (!apr_isdigit(arg[0]))
return "ProxyErrorOverride: status codes to intercept must be numeric";
if (!conf->error_override)
return "ProxyErrorOverride: status codes must follow a value of 'on'";
argcode = strtol(arg, NULL, 10);
if (!ap_is_HTTP_ERROR(argcode))
return "ProxyErrorOverride: status codes to intercept must be valid HTTP Status Codes >=400 && <600";
newcode = apr_array_push(conf->error_override_codes);
*newcode = argcode;
/* Keep the array sorted for binary search. */
for (i = conf->error_override_codes->nelts - 1; i > 0; --i) {
int *oldcode = &((int *)conf->error_override_codes->elts)[i - 1];
if (*oldcode <= argcode) {
break;
}
*newcode = *oldcode;
*oldcode = argcode;
newcode = oldcode;
}
}
else
return "ProxyErrorOverride first parameter must be one of: off | on";
return NULL;
}
static const char *
add_proxy_http_headers(cmd_parms *parms, void *dconf, int flag)
{
proxy_dir_conf *conf = dconf;
conf->add_forwarded_headers = flag;
conf->add_forwarded_headers_set = 1;
return NULL;
}
static const char *
set_preserve_host(cmd_parms *parms, void *dconf, int flag)
{
proxy_dir_conf *conf = dconf;
conf->preserve_host = flag;
conf->preserve_host_set = 1;
return NULL;
}
static const char *
forward_100_continue(cmd_parms *parms, void *dconf, int flag)
{
proxy_dir_conf *conf = dconf;
conf->forward_100_continue = flag;
conf->forward_100_continue_set = 1;
return NULL;
}
static const char *
set_proxy_async_delay(cmd_parms *parms, void *dconf, const char *arg)
{
proxy_dir_conf *conf = dconf;
if (strcmp(arg, "-1") == 0) {
conf->async_delay = -1;
}
else if (ap_timeout_parameter_parse(arg, &conf->async_delay, "s")
|| conf->async_delay < 0) {
return "ProxyAsyncDelay has wrong format";
}
conf->async_delay_set = 1;
return NULL;
}
static const char *
set_proxy_async_idle(cmd_parms *parms, void *dconf, const char *arg)
{
proxy_dir_conf *conf = dconf;
if (ap_timeout_parameter_parse(arg, &conf->async_idle_timeout, "s")
|| conf->async_idle_timeout < 0) {
return "ProxyAsyncIdleTimeout has wrong format";
}
conf->async_idle_timeout_set = 1;
return NULL;
}
static const char *
set_recv_buffer_size(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
int s = atoi(arg);
if (s < 512 && s != 0) {
return "ProxyReceiveBufferSize must be >= 512 bytes, or 0 for system default.";
}
psf->recv_buffer_size = s;
psf->recv_buffer_size_set = 1;
return NULL;
}
static const char *
set_io_buffer_size(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
long s = atol(arg);
if (s < 512 && s) {
return "ProxyIOBufferSize must be >= 512 bytes, or 0 for system default.";
}
psf->io_buffer_size = (s ? s : AP_IOBUFSIZE);
psf->io_buffer_size_set = 1;
return NULL;
}
static const char *
set_max_forwards(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
long s = atol(arg);
psf->maxfwd = s;
psf->maxfwd_set = 1;
return NULL;
}
static const char*
set_proxy_timeout(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
int timeout;
timeout = atoi(arg);
if (timeout<1) {
return "Proxy Timeout must be at least 1 second.";
}
psf->timeout_set = 1;
psf->timeout = apr_time_from_sec(timeout);
return NULL;
}
static const char*
set_via_opt(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
if (strcasecmp(arg, "Off") == 0)
psf->viaopt = via_off;
else if (strcasecmp(arg, "On") == 0)
psf->viaopt = via_on;
else if (strcasecmp(arg, "Block") == 0)
psf->viaopt = via_block;
else if (strcasecmp(arg, "Full") == 0)
psf->viaopt = via_full;
else {
return "ProxyVia must be one of: "
"off | on | full | block";
}
psf->viaopt_set = 1;
return NULL;
}
static const char*
set_bad_opt(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
if (strcasecmp(arg, "IsError") == 0)
psf->badopt = bad_error;
else if (strcasecmp(arg, "Ignore") == 0)
psf->badopt = bad_ignore;
else if (strcasecmp(arg, "StartBody") == 0)
psf->badopt = bad_body;
else {
return "ProxyBadHeader must be one of: "
"IsError | Ignore | StartBody";
}
psf->badopt_set = 1;
return NULL;
}
static const char*
set_status_opt(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
if (strcasecmp(arg, "Off") == 0)
psf->proxy_status = status_off;
else if (strcasecmp(arg, "On") == 0)
psf->proxy_status = status_on;
else if (strcasecmp(arg, "Full") == 0)
psf->proxy_status = status_full;
else {
return "ProxyStatus must be one of: "
"off | on | full";
}
psf->proxy_status_set = 1;
return NULL;
}
static const char *set_bgrowth(cmd_parms *parms, void *dummy, const char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
int growth = atoi(arg);
if (growth < 0 || growth > 1000) {
return "BalancerGrowth must be between 0 and 1000";
}
psf->bgrowth = growth;
psf->bgrowth_set = 1;
return NULL;
}
static const char *set_persist(cmd_parms *parms, void *dummy, int flag)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
psf->bal_persist = flag;
return NULL;
}
static const char *set_inherit(cmd_parms *parms, void *dummy, int flag)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
psf->inherit = flag;
psf->inherit_set = 1;
return NULL;
}
static const char *set_ppinherit(cmd_parms *parms, void *dummy, int flag)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
psf->ppinherit = flag;
psf->ppinherit_set = 1;
return NULL;
}
static const char *add_member(cmd_parms *cmd, void *dummy, const char *arg)
{
server_rec *s = cmd->server;
proxy_server_conf *conf =
ap_get_module_config(s->module_config, &proxy_module);
proxy_balancer *balancer;
proxy_worker *worker;
char *path = cmd->path;
char *name = NULL;
const char *real;
char *word;
apr_table_t *params = apr_table_make(cmd->pool, 5);
const apr_array_header_t *arr;
const apr_table_entry_t *elts;
int reuse = 0;
int i;
/* XXX: Should this be NOT_IN_DIRECTORY|NOT_IN_FILES? */
const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS);
if (err)
return err;
if (cmd->path)
path = apr_pstrdup(cmd->pool, cmd->path);
while (*arg) {
char *val;
word = ap_getword_conf(cmd->pool, &arg);
val = strchr(word, '=');
if (!val) {
if (!path)
path = word;
else if (!name)
name = word;
else {
if (cmd->path)
return "BalancerMember can not have a balancer name when defined in a location";
else
return "Invalid BalancerMember parameter. Parameter must "
"be in the form 'key=value'";
}
} else {
*val++ = '\0';
apr_table_setn(params, word, val);
}
}
if (!path)
return "BalancerMember must define balancer name when outside <Proxy > section";
if (!name)
return "BalancerMember must define remote proxy server";
if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, name))) {
return "BalancerMember uses an invalid \"unix:\" URL";
}
ap_str_tolower(path); /* lowercase scheme://hostname */
/* Try to find the balancer */
balancer = ap_proxy_get_balancer(cmd->temp_pool, conf, path, 0);
if (!balancer) {
err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, path, "/", 0);
if (err)
return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
}
/* Try to find existing worker */
worker = ap_proxy_get_worker(cmd->temp_pool, balancer, conf, real);
if (!worker) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, APLOGNO(01147)
"Defining worker '%s' for balancer '%s'",
name, balancer->s->name);
if ((err = ap_proxy_define_worker(cmd->pool, &worker, balancer, conf, name, 0)) != NULL)
return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, APLOGNO(01148)
"Defined worker '%s' for balancer '%s'",
ap_proxy_worker_get_name(worker), balancer->s->name);
PROXY_COPY_CONF_PARAMS(worker, conf);
} else {
reuse = 1;
ap_log_error(APLOG_MARK, APLOG_INFO, 0, cmd->server, APLOGNO(01149)
"Sharing worker '%s' instead of creating new worker '%s'",
ap_proxy_worker_get_name(worker), name);
}
if (!worker->section_config) {
worker->section_config = balancer->section_config;
}
arr = apr_table_elts(params);
elts = (const apr_table_entry_t *)arr->elts;
for (i = 0; i < arr->nelts; i++) {
if (reuse) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(01150)
"Ignoring parameter '%s=%s' for worker '%s' because of worker sharing",
elts[i].key, elts[i].val, ap_proxy_worker_get_name(worker));
} else {
err = set_worker_param(cmd->pool, cmd->server, worker, elts[i].key,
elts[i].val);
if (err)
return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
}
}
return NULL;
}
static const char *
set_proxy_param(cmd_parms *cmd, void *dummy, const char *arg)
{
server_rec *s = cmd->server;
proxy_server_conf *conf =
(proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module);
char *name = NULL;
char *word, *val;
proxy_balancer *balancer = NULL;
proxy_worker *worker = NULL;
unsigned int worker_type = 0;
int in_proxy_section = 0;
/* XXX: Should this be NOT_IN_DIRECTORY|NOT_IN_FILES? */
const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS);
if (err)
return err;
if (cmd->directive->parent &&
strncasecmp(cmd->directive->parent->directive,
"<Proxy", 6) == 0) {
const char *pargs = cmd->directive->parent->args;
/* Directive inside <Proxy section
* Parent directive arg is the worker/balancer name.
*/
name = ap_getword_conf(cmd->temp_pool, &pargs);
if ((word = ap_strchr(name, '>')))
*word = '\0';
if (strncasecmp(cmd->directive->parent->directive + 6,
"Match", 5) == 0) {
worker_type = AP_PROXY_WORKER_IS_MATCH;
}
else {
worker_type = AP_PROXY_WORKER_IS_PREFIX;
}
in_proxy_section = 1;
}
else {
/* Standard set directive with worker/balancer
* name as first param.
*/
name = ap_getword_conf(cmd->temp_pool, &arg);
}
if (ap_proxy_valid_balancer_name(name, 9)) {
balancer = ap_proxy_get_balancer(cmd->pool, conf, name, 0);
if (!balancer) {
if (in_proxy_section) {
err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, name, "/", 0);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxySet ",
err, NULL);
}
else
return apr_pstrcat(cmd->temp_pool, "ProxySet can not find '",
name, "' Balancer.", NULL);
}
}
else {
const char *real;
if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, name))) {
return "ProxySet uses an invalid \"unix:\" URL";
}
worker = ap_proxy_get_worker_ex(cmd->temp_pool, NULL, conf,
real, worker_type);
if (!worker) {
if (in_proxy_section) {
err = ap_proxy_define_worker_ex(cmd->pool, &worker, NULL,
conf, name, worker_type);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxySet ",
err, NULL);
}
else
return apr_pstrcat(cmd->temp_pool, "ProxySet can not find '",
name, "' Worker.", NULL);
}
}
while (*arg) {
word = ap_getword_conf(cmd->pool, &arg);
val = strchr(word, '=');
if (!val) {
return "Invalid ProxySet parameter. Parameter must be "
"in the form 'key=value'";
}
else
*val++ = '\0';
if (worker)
err = set_worker_param(cmd->pool, cmd->server, worker, word, val);
else
err = set_balancer_param(conf, cmd->pool, balancer, word, val);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxySet: ", err, " ", word, "=", val, "; ", name, NULL);
}
return NULL;
}
static void ap_add_per_proxy_conf(server_rec *s, ap_conf_vector_t *dir_config)
{
proxy_server_conf *sconf = ap_get_module_config(s->module_config,
&proxy_module);
void **new_space = (void **)apr_array_push(sconf->sec_proxy);
*new_space = dir_config;
}
static const char *proxysection(cmd_parms *cmd, void *mconfig, const char *arg)
{
const char *errmsg;
const char *endp = ap_strrchr_c(arg, '>');
int old_overrides = cmd->override;
char *old_path = cmd->path;
proxy_dir_conf *conf;
ap_conf_vector_t *new_dir_conf = ap_create_per_dir_config(cmd->pool);
ap_regex_t *r = NULL;
const command_rec *thiscmd = cmd->cmd;
char *word, *val;
proxy_balancer *balancer = NULL;
proxy_worker *worker = NULL;
unsigned int worker_type = AP_PROXY_WORKER_IS_PREFIX;
const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
proxy_server_conf *sconf =
(proxy_server_conf *) ap_get_module_config(cmd->server->module_config, &proxy_module);
if (err != NULL) {
return err;
}
if (endp == NULL) {
return apr_pstrcat(cmd->pool, cmd->cmd->name,
"> directive missing closing '>'", NULL);
}
arg = apr_pstrndup(cmd->pool, arg, endp-arg);
if (!arg) {
if (thiscmd->cmd_data)
return "<ProxyMatch > block must specify a path";
else
return "<Proxy > block must specify a path";
}
cmd->path = ap_getword_conf(cmd->pool, &arg);
cmd->override = OR_ALL|ACCESS_CONF|PROXY_CONF;
if (!strncasecmp(cmd->path, "proxy:", 6))
cmd->path += 6;
/* XXX Ignore case? What if we proxy a case-insensitive server?!?
* While we are at it, shouldn't we also canonicalize the entire
* scheme? See proxy_fixup()
*/
if (thiscmd->cmd_data) { /* <ProxyMatch> */
r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED);
if (!r) {
return "Regex could not be compiled";
}
worker_type = AP_PROXY_WORKER_IS_MATCH;
}
/* initialize our config and fetch it */
conf = ap_set_config_vectors(cmd->server, new_dir_conf, cmd->path,
&proxy_module, cmd->pool);
errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_dir_conf);
if (errmsg != NULL)
return errmsg;
conf->r = r;
conf->p = cmd->path;
conf->p_is_fnmatch = apr_fnmatch_test(conf->p);
if (r) {
conf->refs = apr_array_make(cmd->pool, 8, sizeof(char *));
if (ap_regname(r, conf->refs, AP_REG_MATCH, 1) < 0) {
return "Error processing regex captures";
}
}
ap_add_per_proxy_conf(cmd->server, new_dir_conf);
if (*arg != '\0') {
if (thiscmd->cmd_data)
return "Multiple <ProxyMatch> arguments not (yet) supported.";
if (conf->p_is_fnmatch)
return apr_pstrcat(cmd->pool, thiscmd->name,
"> arguments are not supported for wildchar url.",
NULL);
if (!ap_strchr_c(conf->p, ':'))
return apr_pstrcat(cmd->pool, thiscmd->name,
"> arguments are not supported for non url.",
NULL);
if (ap_proxy_valid_balancer_name((char *)conf->p, 9)) {
balancer = ap_proxy_get_balancer(cmd->pool, sconf, conf->p, 0);
if (!balancer) {
err = ap_proxy_define_balancer(cmd->pool, &balancer,
sconf, conf->p, "/", 0);
if (err)
return apr_pstrcat(cmd->temp_pool, thiscmd->name,
" ", err, NULL);
}
if (!balancer->section_config) {
balancer->section_config = new_dir_conf;
}
}
else {
const char *real;
if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, conf->p))) {
return "<Proxy/ProxyMatch > uses an invalid \"unix:\" URL";
}
worker = ap_proxy_get_worker_ex(cmd->temp_pool, NULL, sconf,
real, worker_type);
if (!worker) {
err = ap_proxy_define_worker_ex(cmd->pool, &worker, NULL, sconf,
conf->p, worker_type);
if (err)
return apr_pstrcat(cmd->temp_pool, thiscmd->name,
" ", err, NULL);
}
if (!worker->section_config) {
worker->section_config = new_dir_conf;
}
}
if (worker == NULL && balancer == NULL) {
return apr_pstrcat(cmd->pool, thiscmd->name,
"> arguments are supported only for workers.",
NULL);
}
while (*arg) {
word = ap_getword_conf(cmd->pool, &arg);
val = strchr(word, '=');
if (!val) {
return "Invalid Proxy parameter. Parameter must be "
"in the form 'key=value'";
}
else
*val++ = '\0';
if (worker)
err = set_worker_param(cmd->pool, cmd->server, worker, word, val);
else
err = set_balancer_param(sconf, cmd->pool, balancer,
word, val);
if (err)
return apr_pstrcat(cmd->temp_pool, thiscmd->name, " ", err, " ",
word, "=", val, "; ", conf->p, NULL);
}
}
cmd->path = old_path;
cmd->override = old_overrides;
return NULL;
}
static const command_rec proxy_cmds[] =
{
AP_INIT_RAW_ARGS("<Proxy", proxysection, NULL, RSRC_CONF,
"Container for directives affecting resources located in the proxied "
"location"),
AP_INIT_RAW_ARGS("<ProxyMatch", proxysection, (void*)1, RSRC_CONF,
"Container for directives affecting resources located in the proxied "
"location, in regular expression syntax"),
AP_INIT_FLAG("ProxyRequests", set_proxy_req, NULL, RSRC_CONF,
"on if the true proxy requests should be accepted"),
AP_INIT_TAKE23("ProxyRemote", add_proxy_noregex, NULL, RSRC_CONF,
"a scheme, partial URL or '*' and a proxy server"),
AP_INIT_TAKE23("ProxyRemoteMatch", add_proxy_regex, NULL, RSRC_CONF,
"a regex pattern and a proxy server"),
AP_INIT_FLAG("ProxyPassInterpolateEnv", ap_set_flag_slot_char,
(void*)APR_OFFSETOF(proxy_dir_conf, interpolate_env),
RSRC_CONF|ACCESS_CONF, "Interpolate Env Vars in reverse Proxy") ,
AP_INIT_RAW_ARGS("ProxyPass", add_pass_noregex, NULL, RSRC_CONF|ACCESS_CONF,
"a virtual path and a URL"),
AP_INIT_RAW_ARGS("ProxyPassMatch", add_pass_regex, NULL, RSRC_CONF|ACCESS_CONF,
"a virtual path and a URL"),
AP_INIT_TAKE123("ProxyPassReverse", add_pass_reverse, NULL, RSRC_CONF|ACCESS_CONF,
"a virtual path and a URL for reverse proxy behaviour"),
AP_INIT_TAKE23("ProxyPassReverseCookiePath", cookie_path, NULL,
RSRC_CONF|ACCESS_CONF, "Path rewrite rule for proxying cookies"),
AP_INIT_TAKE23("ProxyPassReverseCookieDomain", cookie_domain, NULL,
RSRC_CONF|ACCESS_CONF, "Domain rewrite rule for proxying cookies"),
AP_INIT_ITERATE("ProxyBlock", set_proxy_exclude, NULL, RSRC_CONF,
"A list of names, hosts or domains to which the proxy will not connect"),
AP_INIT_TAKE1("ProxyReceiveBufferSize", set_recv_buffer_size, NULL, RSRC_CONF,
"Receive buffer size for outgoing HTTP and FTP connections in bytes"),
AP_INIT_TAKE1("ProxyIOBufferSize", set_io_buffer_size, NULL, RSRC_CONF,
"IO buffer size for outgoing HTTP and FTP connections in bytes"),
AP_INIT_TAKE1("ProxyMaxForwards", set_max_forwards, NULL, RSRC_CONF,
"The maximum number of proxies a request may be forwarded through."),
AP_INIT_ITERATE("NoProxy", set_proxy_dirconn, NULL, RSRC_CONF,
"A list of domains, hosts, or subnets to which the proxy will connect directly"),
AP_INIT_TAKE1("ProxyDomain", set_proxy_domain, NULL, RSRC_CONF,
"The default intranet domain name (in absence of a domain in the URL)"),
AP_INIT_TAKE1("ProxyVia", set_via_opt, NULL, RSRC_CONF,
"Configure Via: proxy header header to one of: on | off | block | full"),
AP_INIT_ITERATE("ProxyErrorOverride", set_proxy_error_override, NULL, RSRC_CONF|ACCESS_CONF,
"use our error handling pages instead of the servers' we are proxying"),
AP_INIT_FLAG("ProxyPreserveHost", set_preserve_host, NULL, RSRC_CONF|ACCESS_CONF,
"on if we should preserve host header while proxying"),
AP_INIT_TAKE1("ProxyTimeout", set_proxy_timeout, NULL, RSRC_CONF,
"Set the timeout (in seconds) for a proxied connection. "
"This overrides the server timeout"),
AP_INIT_TAKE1("ProxyBadHeader", set_bad_opt, NULL, RSRC_CONF,
"How to handle bad header line in response: IsError | Ignore | StartBody"),
AP_INIT_RAW_ARGS("BalancerMember", add_member, NULL, RSRC_CONF|ACCESS_CONF,
"A balancer name and scheme with list of params"),
AP_INIT_TAKE1("BalancerGrowth", set_bgrowth, NULL, RSRC_CONF,
"Number of additional Balancers that can be added post-config"),
AP_INIT_FLAG("BalancerPersist", set_persist, NULL, RSRC_CONF,
"on if the balancer should persist changes on reboot/restart made via the Balancer Manager"),
AP_INIT_FLAG("BalancerInherit", set_inherit, NULL, RSRC_CONF,
"on if this server should inherit Balancers and Workers defined in the main server "
"(Setting to off recommended if using the Balancer Manager)"),
AP_INIT_FLAG("ProxyPassInherit", set_ppinherit, NULL, RSRC_CONF,
"on if this server should inherit all ProxyPass directives defined in the main server "
"(Setting to off recommended if using the Balancer Manager)"),
AP_INIT_TAKE1("ProxyStatus", set_status_opt, NULL, RSRC_CONF,
"Configure Status: proxy status to one of: on | off | full"),
AP_INIT_RAW_ARGS("ProxySet", set_proxy_param, NULL, RSRC_CONF|ACCESS_CONF,
"A balancer or worker name with list of params"),
AP_INIT_TAKE1("ProxySourceAddress", set_source_address, NULL, RSRC_CONF,
"Configure local source IP used for request forward"),
AP_INIT_FLAG("ProxyAddHeaders", add_proxy_http_headers, NULL, RSRC_CONF|ACCESS_CONF,
"on if X-Forwarded-* headers should be added or completed"),
AP_INIT_FLAG("Proxy100Continue", forward_100_continue, NULL, RSRC_CONF|ACCESS_CONF,
"on if 100-Continue should be forwarded to the origin server, off if the "
"proxy should handle it by itself"),
AP_INIT_TAKE1("ProxyAsyncDelay", set_proxy_async_delay, NULL, RSRC_CONF|ACCESS_CONF,
"Amount of time to poll before going asynchronous"),
AP_INIT_TAKE1("ProxyAsyncIdleTimeout", set_proxy_async_idle, NULL, RSRC_CONF|ACCESS_CONF,
"Timeout for asynchronous inactivity, ProxyTimeout by default"),
{NULL}
};
static APR_OPTIONAL_FN_TYPE(ssl_proxy_enable) *proxy_ssl_enable = NULL;
static APR_OPTIONAL_FN_TYPE(ssl_engine_disable) *proxy_ssl_disable = NULL;
static APR_OPTIONAL_FN_TYPE(ssl_engine_set) *proxy_ssl_engine = NULL;
PROXY_DECLARE(int) ap_proxy_ssl_enable(conn_rec *c)
{
/*
* if c == NULL just check if the optional function was imported
* else run the optional function so ssl filters are inserted
*/
if (c == NULL) {
return ap_ssl_has_outgoing_handlers();
}
return ap_ssl_bind_outgoing(c, NULL, 1) == OK;
}
PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c)
{
return ap_ssl_bind_outgoing(c, NULL, 0) == OK;
}
PROXY_DECLARE(int) ap_proxy_ssl_engine(conn_rec *c,
ap_conf_vector_t *per_dir_config,
int enable)
{
/*
* if c == NULL just check if the optional function was imported
* else run the optional function so ssl filters are inserted
*/
if (c == NULL) {
return ap_ssl_has_outgoing_handlers();
}
return ap_ssl_bind_outgoing(c, per_dir_config, enable) == OK;
}
PROXY_DECLARE(int) ap_proxy_conn_is_https(conn_rec *c)
{
return ap_ssl_conn_is_ssl(c);
}
PROXY_DECLARE(const char *) ap_proxy_ssl_val(apr_pool_t *p, server_rec *s,
conn_rec *c, request_rec *r,
const char *var)
{
return ap_ssl_var_lookup(p, s, c, r, var);
}
static int proxy_post_config(apr_pool_t *pconf, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *main_s)
{
server_rec *s = main_s;
apr_status_t rv = ap_global_mutex_create(&proxy_mutex, NULL,
proxy_id, NULL, s, pconf, 0);
if (rv != APR_SUCCESS) {
ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02478)
"failed to create %s mutex", proxy_id);
return rv;
}
proxy_ssl_enable = APR_RETRIEVE_OPTIONAL_FN(ssl_proxy_enable);
proxy_ssl_disable = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_disable);
proxy_ssl_engine = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_set);
ap_proxy_strmatch_path = apr_strmatch_precompile(pconf, "path=", 0);
ap_proxy_strmatch_domain = apr_strmatch_precompile(pconf, "domain=", 0);
for (; s; s = s->next) {
int rc, i;
proxy_server_conf *sconf =
ap_get_module_config(s->module_config, &proxy_module);
ap_conf_vector_t **sections =
(ap_conf_vector_t **)sconf->sec_proxy->elts;
for (i = 0; i < sconf->sec_proxy->nelts; ++i) {
rc = proxy_run_section_post_config(pconf, ptemp, plog,
s, sections[i]);
if (rc != OK && rc != DECLINED) {
return rc;
}
}
}
return OK;
}
/*
* proxy Extension to mod_status
*/
static int proxy_status_hook(request_rec *r, int flags)
{
int i, n;
void *sconf = r->server->module_config;
proxy_server_conf *conf = (proxy_server_conf *)
ap_get_module_config(sconf, &proxy_module);
proxy_balancer *balancer = NULL;
proxy_worker **worker = NULL;
if (conf->balancers->nelts == 0 ||
conf->proxy_status == status_off)
return OK;
balancer = (proxy_balancer *)conf->balancers->elts;
for (i = 0; i < conf->balancers->nelts; i++) {
if (!(flags & AP_STATUS_SHORT)) {
ap_rputs("<hr />\n<h1>Proxy LoadBalancer Status for ", r);
ap_rvputs(r, balancer->s->name, "</h1>\n\n", NULL);
ap_rputs("\n\n<table border=\"0\"><tr>"
"<th>SSes</th><th>Timeout</th><th>Method</th>"
"</tr>\n<tr>", r);
if (*balancer->s->sticky) {
if (strcmp(balancer->s->sticky, balancer->s->sticky_path)) {
ap_rvputs(r, "<td>", balancer->s->sticky, " | ",
balancer->s->sticky_path, NULL);
}
else {
ap_rvputs(r, "<td>", balancer->s->sticky, NULL);
}
}
else {
ap_rputs("<td> - ", r);
}
ap_rprintf(r, "</td><td>%" APR_TIME_T_FMT "</td>",
apr_time_sec(balancer->s->timeout));
ap_rprintf(r, "<td>%s</td>\n",
balancer->lbmethod->name);
ap_rputs("</table>\n", r);
ap_rputs("\n\n<table border=\"0\"><tr>"
"<th>Sch</th><th>Host</th><th>Stat</th>"
"<th>Route</th><th>Redir</th>"
"<th>F</th><th>Set</th><th>Acc</th><th>Busy</th><th>Wr</th><th>Rd</th>"
"</tr>\n", r);
}
else {
ap_rprintf(r, "ProxyBalancer[%d]Name: %s\n", i, balancer->s->name);
}
worker = (proxy_worker **)balancer->workers->elts;
for (n = 0; n < balancer->workers->nelts; n++) {
char fbuf[50];
if (!(flags & AP_STATUS_SHORT)) {
ap_rvputs(r, "<tr>\n<td>", (*worker)->s->scheme, "</td>", NULL);
ap_rvputs(r, "<td>", (*worker)->s->hostname_ex, "</td><td>", NULL);
ap_rvputs(r, ap_proxy_parse_wstatus(r->pool, *worker), NULL);
ap_rvputs(r, "</td><td>", (*worker)->s->route, NULL);
ap_rvputs(r, "</td><td>", (*worker)->s->redirect, NULL);
ap_rprintf(r, "</td><td>%.2f</td>", (float)((*worker)->s->lbfactor)/100.0);
ap_rprintf(r, "<td>%d</td>", (*worker)->s->lbset);
ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td>",
(*worker)->s->elected);
ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td><td>",
(*worker)->s->busy);
ap_rputs(apr_strfsize((*worker)->s->transferred, fbuf), r);
ap_rputs("</td><td>", r);
ap_rputs(apr_strfsize((*worker)->s->read, fbuf), r);
ap_rputs("</td>\n", r);
/* TODO: Add the rest of dynamic worker data */
ap_rputs("</tr>\n", r);
}
else {
ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Name: %s\n",
i, n, (*worker)->s->name);
ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Status: %s\n",
i, n, ap_proxy_parse_wstatus(r->pool, *worker));
ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Elected: %"
APR_SIZE_T_FMT "\n",
i, n, (*worker)->s->elected);
ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Busy: %"
APR_SIZE_T_FMT "\n",
i, n, (*worker)->s->busy);
ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Sent: %"
APR_OFF_T_FMT "K\n",
i, n, (*worker)->s->transferred >> 10);
ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Rcvd: %"
APR_OFF_T_FMT "K\n",
i, n, (*worker)->s->read >> 10);
/* TODO: Add the rest of dynamic worker data */
}
++worker;
}
if (!(flags & AP_STATUS_SHORT)) {
ap_rputs("</table>\n", r);
}
++balancer;
}
if (!(flags & AP_STATUS_SHORT)) {
ap_rputs("<hr /><table>\n"
"<tr><th>SSes</th><td>Sticky session name</td></tr>\n"
"<tr><th>Timeout</th><td>Balancer Timeout</td></tr>\n"
"<tr><th>Sch</th><td>Connection scheme</td></tr>\n"
"<tr><th>Host</th><td>Backend Hostname</td></tr>\n"
"<tr><th>Stat</th><td>Worker status</td></tr>\n"
"<tr><th>Route</th><td>Session Route</td></tr>\n"
"<tr><th>Redir</th><td>Session Route Redirection</td></tr>\n"
"<tr><th>F</th><td>Load Balancer Factor</td></tr>\n"
"<tr><th>Acc</th><td>Number of uses</td></tr>\n"
"<tr><th>Wr</th><td>Number of bytes transferred</td></tr>\n"
"<tr><th>Rd</th><td>Number of bytes read</td></tr>\n"
"</table>", r);
}
return OK;
}
static void child_init(apr_pool_t *p, server_rec *s)
{
proxy_server_conf *main_conf;
proxy_worker *forward = NULL;
proxy_worker *reverse = NULL;
apr_status_t rv = apr_global_mutex_child_init(&proxy_mutex,
apr_global_mutex_lockfile(proxy_mutex),
p);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(02479)
"could not init proxy_mutex in child");
exit(1); /* Ugly, but what else? */
}
main_conf = ap_get_module_config(s->module_config, &proxy_module);
for (; s; s = s->next) {
void *sconf = s->module_config;
proxy_server_conf *conf;
proxy_worker *worker;
int i;
conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module);
/*
* NOTE: non-balancer members don't use shm at all...
* after all, why should they?
*/
worker = (proxy_worker *)conf->workers->elts;
for (i = 0; i < conf->workers->nelts; i++, worker++) {
ap_proxy_initialize_worker(worker, s, conf->pool);
}
/* Create and initialize forward worker if defined */
if (conf->req_set && conf->req && !forward) {
ap_proxy_define_worker(main_conf->pool, &forward, NULL, NULL,
"http://www.apache.org", 0);
PROXY_STRNCPY(forward->s->name, "proxy:forward");
PROXY_STRNCPY(forward->s->hostname, "*"); /* for compatibility */
PROXY_STRNCPY(forward->s->hostname_ex, "*");
PROXY_STRNCPY(forward->s->scheme, "*");
forward->hash.def = forward->s->hash.def =
ap_proxy_hashfunc(forward->s->name, PROXY_HASHFUNC_DEFAULT);
forward->hash.fnv = forward->s->hash.fnv =
ap_proxy_hashfunc(forward->s->name, PROXY_HASHFUNC_FNV);
/* Do not disable worker in case of errors */
forward->s->status |= PROXY_WORKER_IGNORE_ERRORS;
/* Mark as the "generic" worker */
forward->s->status |= PROXY_WORKER_GENERIC;
/* Disable connection and address reuse for generic workers */
forward->s->is_address_reusable = 0;
ap_proxy_initialize_worker(forward, s, main_conf->pool);
}
if (conf->req_set && conf->req) {
conf->forward = forward;
}
/* Create and initialize the generic reserse worker once only */
if (!reverse) {
ap_proxy_define_worker(main_conf->pool, &reverse, NULL, NULL,
"http://www.apache.org", 0);
PROXY_STRNCPY(reverse->s->name, "proxy:reverse");
PROXY_STRNCPY(reverse->s->hostname, "*"); /* for compatibility */
PROXY_STRNCPY(reverse->s->hostname_ex, "*");
PROXY_STRNCPY(reverse->s->scheme, "*");
reverse->hash.def = reverse->s->hash.def =
ap_proxy_hashfunc(reverse->s->name, PROXY_HASHFUNC_DEFAULT);
reverse->hash.fnv = reverse->s->hash.fnv =
ap_proxy_hashfunc(reverse->s->name, PROXY_HASHFUNC_FNV);
/* Do not disable worker in case of errors */
reverse->s->status |= PROXY_WORKER_IGNORE_ERRORS;
/* Mark as the "generic" worker */
reverse->s->status |= PROXY_WORKER_GENERIC;
/* Disable connection and address reuse for generic workers */
reverse->s->is_address_reusable = 0;
ap_proxy_initialize_worker(reverse, s, main_conf->pool);
}
conf->reverse = reverse;
}
}
/*
* This routine is called before the server processes the configuration
* files.
*/
static int proxy_pre_config(apr_pool_t *pconf, apr_pool_t *plog,
apr_pool_t *ptemp)
{
apr_status_t rv = ap_mutex_register(pconf, proxy_id, NULL,
APR_LOCK_DEFAULT, 0);
if (rv != APR_SUCCESS) {
ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02480)
"failed to register %s mutex", proxy_id);
return 500; /* An HTTP status would be a misnomer! */
}
APR_OPTIONAL_HOOK(ap, status_hook, proxy_status_hook, NULL, NULL,
APR_HOOK_MIDDLE);
/* Reset workers count on graceful restart */
proxy_lb_workers = 0;
set_worker_hc_param_f = APR_RETRIEVE_OPTIONAL_FN(set_worker_hc_param);
return OK;
}
static void register_hooks(apr_pool_t *p)
{
/* Only the mpm_winnt has child init hook handler.
* make sure that we are called after the mpm
* initializes.
*/
static const char *const aszPred[] = { "mpm_winnt.c", "mod_proxy_balancer.c",
"mod_proxy_hcheck.c", NULL};
static const char * const aszModRewrite[] = { "mod_rewrite.c", NULL };
/* handler */
ap_hook_handler(proxy_handler, NULL, NULL, APR_HOOK_FIRST);
/* filename-to-URI translation */
ap_hook_pre_translate_name(proxy_pre_translate_name, NULL, NULL,
APR_HOOK_MIDDLE);
/* mod_rewrite has a say on the uri before proxy translation */
ap_hook_translate_name(proxy_translate_name, aszModRewrite, NULL,
APR_HOOK_FIRST);
/* walk <Proxy > entries and suppress default TRACE behavior */
ap_hook_map_to_storage(proxy_map_location, NULL,NULL, APR_HOOK_FIRST);
/* fixup after mod_rewrite so that a [P] URL from there gets fixed up */
ap_hook_fixups(proxy_fixup, aszModRewrite, NULL, APR_HOOK_FIRST);
/* post read_request handling */
ap_hook_post_read_request(proxy_detect, NULL, NULL, APR_HOOK_FIRST);
/* pre config handling */
ap_hook_pre_config(proxy_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
/* post config handling */
ap_hook_post_config(proxy_post_config, NULL, NULL, APR_HOOK_MIDDLE);
/* child init handling */
ap_hook_child_init(child_init, aszPred, NULL, APR_HOOK_MIDDLE);
/* register optional functions within proxy_util.c */
proxy_util_register_hooks(p);
}
AP_DECLARE_MODULE(proxy) =
{
STANDARD20_MODULE_STUFF,
create_proxy_dir_config, /* create per-directory config structure */
merge_proxy_dir_config, /* merge per-directory config structures */
create_proxy_config, /* create per-server config structure */
merge_proxy_config, /* merge per-server config structures */
proxy_cmds, /* command table */
register_hooks
};
APR_HOOK_STRUCT(
APR_HOOK_LINK(scheme_handler)
APR_HOOK_LINK(canon_handler)
APR_HOOK_LINK(pre_request)
APR_HOOK_LINK(post_request)
APR_HOOK_LINK(request_status)
APR_HOOK_LINK(check_trans)
APR_HOOK_LINK(tunnel_forward)
)
APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, scheme_handler,
(request_rec *r, proxy_worker *worker,
proxy_server_conf *conf,
char *url, const char *proxyhost,
apr_port_t proxyport),(r,worker,conf,
url,proxyhost,proxyport),DECLINED)
APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, check_trans,
(request_rec *r, const char *url),
(r, url), DECLINED)
APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, canon_handler,
(request_rec *r, char *url),(r,
url),DECLINED)
APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, pre_request, (
proxy_worker **worker,
proxy_balancer **balancer,
request_rec *r,
proxy_server_conf *conf,
char **url),(worker,balancer,
r,conf,url),DECLINED)
APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, post_request,
(proxy_worker *worker,
proxy_balancer *balancer,
request_rec *r,
proxy_server_conf *conf),(worker,
balancer,r,conf),DECLINED)
APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, section_post_config,
(apr_pool_t *p, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *s,
ap_conf_vector_t *section_config),
(p, ptemp, plog, s, section_config),
OK, DECLINED)
APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, fixups,
(request_rec *r), (r),
OK, DECLINED)
APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, request_status,
(int *status, request_rec *r),
(status, r),
OK, DECLINED)
APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, detach_backend,
(request_rec *r, proxy_conn_rec *backend),
(r, backend), OK, DECLINED)
APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(proxy, PROXY, int, tunnel_forward,
(proxy_tunnel_rec *tunnel,
conn_rec *c_i, conn_rec *c_o,
apr_bucket_brigade *bb),
(tunnel, c_i, c_o, bb),
OK, DECLINED)