mod_proxy.c revision 144f8db798e3b92e4e4a3f51904e8f21ad160680
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder/* Licensed to the Apache Software Foundation (ASF) under one or more
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * contributor license agreements. See the NOTICE file distributed with
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * this work for additional information regarding copyright ownership.
97018cf5fa25b494adffd7e9b4e87320dae6bf47Christian Maeder * The ASF licenses this file to You under the Apache License, Version 2.0
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * (the "License"); you may not use this file except in compliance with
b4fbc96e05117839ca409f5f20f97b3ac872d1edTill Mossakowski * the License. You may obtain a copy of the License at
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski *
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * http://www.apache.org/licenses/LICENSE-2.0
f3a94a197960e548ecd6520bb768cb0d547457bbChristian Maeder *
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder * Unless required by applicable law or agreed to in writing, software
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * distributed under the License is distributed on an "AS IS" BASIS,
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * See the License for the specific language governing permissions and
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * limitations under the License.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#define CORE_PRIVATE
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#include "mod_proxy.h"
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#include "mod_core.h"
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#include "apr_optional.h"
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#include "scoreboard.h"
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#include "mod_status.h"
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
88ece6e49930670e8fd3ee79c89a2e918d2fbd0cChristian Maeder#if (MODULE_MAGIC_NUMBER_MAJOR > 20020903)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#include "mod_ssl.h"
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder#else
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till MossakowskiAPR_DECLARE_OPTIONAL_FN(int, ssl_proxy_enable, (conn_rec *));
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till MossakowskiAPR_DECLARE_OPTIONAL_FN(int, ssl_engine_disable, (conn_rec *));
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till MossakowskiAPR_DECLARE_OPTIONAL_FN(int, ssl_is_https, (conn_rec *));
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till MossakowskiAPR_DECLARE_OPTIONAL_FN(char *, ssl_var_lookup,
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski (apr_pool_t *, server_rec *,
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski conn_rec *, request_rec *, char *));
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder#endif
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#ifndef MAX
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#define MAX(x,y) ((x) >= (y) ? (x) : (y))
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#endif
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski/*
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * A Web proxy module. Stages:
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski *
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * translate_name: set filename to proxy:<URL>
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * map_to_storage: run proxy_walk (rather than directory_walk/file_walk)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * can't trust directory_walk/file_walk since these are
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * not in our filesystem. Prevents mod_http from serving
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * the TRACE request we will set aside to handle later.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * type_checker: set type to PROXY_MAGIC_TYPE if filename begins proxy:
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * fix_ups: convert the URL stored in the filename to the
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * canonical form.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * handler: handle proxy requests
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski/* -------------------------------------------------------------- */
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder/* Translate the URL into a 'filename' */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski#define PROXY_COPY_CONF_PARAMS(w, c) \
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder do { \
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski (w)->timeout = (c)->timeout; \
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski (w)->timeout_set = (c)->timeout_set; \
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski (w)->recv_buffer_size = (c)->recv_buffer_size; \
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski (w)->recv_buffer_size_set = (c)->recv_buffer_size_set; \
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski (w)->io_buffer_size = (c)->io_buffer_size; \
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski (w)->io_buffer_size_set = (c)->io_buffer_size_set; \
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski } while (0)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowskistatic const char *set_worker_param(apr_pool_t *p,
88ece6e49930670e8fd3ee79c89a2e918d2fbd0cChristian Maeder proxy_worker *worker,
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski const char *key,
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski const char *val)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski{
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski int ival;
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder if (!strcasecmp(key, "loadfactor")) {
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* Normalized load factor. Used with BalancerMamber,
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * it is a number between 1 and 100.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski worker->lbfactor = atoi(val);
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski if (worker->lbfactor < 1 || worker->lbfactor > 100)
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder return "LoadFactor must be number between 1..100";
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski }
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski else if (!strcasecmp(key, "retry")) {
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* If set it will give the retry timeout for the worker
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * The default value is 60 seconds, meaning that if
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * in error state, it will be retried after that timeout.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder ival = atoi(val);
b1f59a4ea7c96f4c03a4d7cfcb9c5e66871cfbbbChristian Maeder if (ival < 1)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski return "Retry must be at least one second";
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski worker->retry = apr_time_from_sec(ival);
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski }
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski else if (!strcasecmp(key, "ttl")) {
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* Time in seconds that will destroy all the connections
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * that exced the smax
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski ival = atoi(val);
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski if (ival < 1)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski return "TTL must be at least one second";
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski worker->ttl = apr_time_from_sec(ival);
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski }
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder else if (!strcasecmp(key, "min")) {
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* Initial number of connections to remote
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski ival = atoi(val);
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski if (ival < 0)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski return "Min must be a positive number";
adea2e45fa61f1097aadc490a0aeaf4831b729ccChristian Maeder worker->min = ival;
88ece6e49930670e8fd3ee79c89a2e918d2fbd0cChristian Maeder }
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski else if (!strcasecmp(key, "max")) {
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* Maximum number of connections to remote
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
88ece6e49930670e8fd3ee79c89a2e918d2fbd0cChristian Maeder ival = atoi(val);
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski if (ival < 0)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski return "Max must be a positive number";
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski worker->hmax = ival;
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski }
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* XXX: More inteligent naming needed */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski else if (!strcasecmp(key, "smax")) {
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* Maximum number of connections to remote that
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * will not be destroyed
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski ival = atoi(val);
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski if (ival < 0)
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski return "Smax must be a positive number";
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski worker->smax = ival;
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski }
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski else if (!strcasecmp(key, "acquire")) {
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski /* Acquire timeout in milliseconds.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * If set this will be the maximum time to
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski * wait for a free connection.
df11e5eab86d8247f58e301d8f0a2c6ecf4c9541Till Mossakowski */
ival = atoi(val);
if (ival < 1)
return "Acquire must be at least one mili second";
worker->acquire = apr_time_make(0, ival * 1000);
worker->acquire_set = 1;
}
else if (!strcasecmp(key, "timeout")) {
/* Connection timeout in seconds.
* Defaults to server timeout.
*/
ival = atoi(val);
if (ival < 1)
return "Timeout must be at least one second";
worker->timeout = apr_time_from_sec(ival);
worker->timeout_set = 1;
}
else if (!strcasecmp(key, "iobuffersize")) {
long s = atol(val);
worker->io_buffer_size = ((s > AP_IOBUFSIZE) ? s : AP_IOBUFSIZE);
worker->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->recv_buffer_size = ival;
worker->recv_buffer_size_set = 1;
}
else if (!strcasecmp(key, "keepalive")) {
if (!strcasecmp(val, "on"))
worker->keepalive = 1;
else if (!strcasecmp(val, "off"))
worker->keepalive = 0;
else
return "KeepAlive must be On|Off";
worker->keepalive_set = 1;
}
else if (!strcasecmp(key, "route")) {
/* Worker route.
*/
if (strlen(val) > PROXY_WORKER_MAX_ROUTE_SIZ)
return "Route length must be < 64 characters";
worker->route = apr_pstrdup(p, val);
}
else if (!strcasecmp(key, "redirect")) {
/* Worker redirection route.
*/
if (strlen(val) > PROXY_WORKER_MAX_ROUTE_SIZ)
return "Redirect length must be < 64 characters";
worker->redirect = apr_pstrdup(p, val);
}
else if (!strcasecmp(key, "status")) {
const char *v;
int mode = 1;
/* Worker status.
*/
for (v = val; *v; v++) {
if (*v == '+') {
mode = 1;
v++;
}
else if (*v == '-') {
mode = 0;
v++;
}
if (*v == 'D' || *v == 'd') {
if (mode)
worker->status |= PROXY_WORKER_DISABLED;
else
worker->status &= ~PROXY_WORKER_DISABLED;
}
else if (*v == 'S' || *v == 's') {
if (mode)
worker->status |= PROXY_WORKER_STOPPED;
else
worker->status &= ~PROXY_WORKER_STOPPED;
}
else if (*v == 'E' || *v == 'e') {
if (mode)
worker->status |= PROXY_WORKER_IN_ERROR;
else
worker->status &= ~PROXY_WORKER_IN_ERROR;
}
else if (*v == 'H' || *v == 'h') {
if (mode)
worker->status |= PROXY_WORKER_HOT_STANDBY;
else
worker->status &= ~PROXY_WORKER_HOT_STANDBY;
}
else {
return "Unknown status parameter option";
}
}
}
else if (!strcasecmp(key, "flushpackets")) {
if (!strcasecmp(val, "on"))
worker->flush_packets = flush_on;
else if (!strcasecmp(val, "off"))
worker->flush_packets = flush_off;
else if (!strcasecmp(val, "auto"))
worker->flush_packets = flush_auto;
else
return "flushpackets must be on|off|auto";
}
else if (!strcasecmp(key, "flushwait")) {
ival = atoi(val);
if (ival > 1000 || ival < 0) {
return "flushwait must be <= 1000, or 0 for system default of 10 millseconds.";
}
if (ival == 0)
worker->flush_wait = PROXY_FLUSH_WAIT;
else
worker->flush_wait = ival * 1000; /* change to microseconds */
}
else if (!strcasecmp(key, "ping")) {
/* Ping/Pong timeout in seconds.
*/
ival = atoi(val);
if (ival < 1)
return "Ping/Pong timeout must be at least one second";
worker->ping_timeout = apr_time_from_sec(ival);
worker->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->lbset = ival;
}
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;
if (!strcasecmp(key, "stickysession")) {
/* Balancer sticky session name.
* Set to something like JSESSIONID or
* PHPSESSIONID, etc..,
*/
balancer->sticky = apr_pstrdup(p, val);
}
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->sticky_force = 1;
else if (!strcasecmp(val, "off"))
balancer->sticky_force = 0;
else
return "failover must be On|Off";
}
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.
*/
ival = atoi(val);
if (ival < 1)
return "timeout must be at least one second";
balancer->timeout = apr_time_from_sec(ival);
}
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->max_attempts = ival;
balancer->max_attempts_set = 1;
}
else if (!strcasecmp(key, "lbmethod")) {
proxy_balancer_method *provider;
provider = ap_lookup_provider(PROXY_LBMETHOD, val, "0");
if (provider) {
balancer->lbmethod = provider;
return NULL;
}
return "unknown lbmethod";
}
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;
}
/* 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
&& !strcasecmp(r->parsed_uri.scheme, ap_http_scheme(r))
&& 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;
}
static const char *proxy_interpolate(request_rec *r, const char *str)
{
/* Interpolate an env str in a configuration string
* Syntax ${var} --> value_of(var)
* Method: replace one var, and recurse on remainder of string
* Nothing clever here, and crap like nested vars may do silly things
* but we'll at least avoid sending the unwary into a loop
*/
const char *start;
const char *end;
const char *var;
const char *val;
const char *firstpart;
start = ap_strstr_c(str, "${");
if (start == NULL) {
return str;
}
end = ap_strchr_c(start+2, '}');
if (end == NULL) {
return str;
}
/* OK, this is syntax we want to interpolate. Is there such a var ? */
var = apr_pstrndup(r->pool, start+2, end-(start+2));
val = apr_table_get(r->subprocess_env, var);
firstpart = apr_pstrndup(r->pool, str, (start-str));
if (val == NULL) {
return apr_pstrcat(r->pool, firstpart,
proxy_interpolate(r, end+1), NULL);
}
else {
return apr_pstrcat(r->pool, firstpart, val,
proxy_interpolate(r, end+1), NULL);
}
}
static apr_array_header_t *proxy_vars(request_rec *r,
apr_array_header_t *hdr)
{
int i;
apr_array_header_t *ret = apr_array_make(r->pool, hdr->nelts,
sizeof (struct proxy_alias));
struct proxy_alias *old = (struct proxy_alias *) hdr->elts;
for (i = 0; i < hdr->nelts; ++i) {
struct proxy_alias *newcopy = apr_array_push(ret);
newcopy->fake = proxy_interpolate(r, old[i].fake);
newcopy->real = proxy_interpolate(r, old[i].real);
}
return ret;
}
static int proxy_trans(request_rec *r)
{
void *sconf = r->server->module_config;
proxy_server_conf *conf =
(proxy_server_conf *) ap_get_module_config(sconf, &proxy_module);
int i, len;
struct proxy_alias *ent = (struct proxy_alias *) conf->aliases->elts;
proxy_dir_conf *dconf = ap_get_module_config(r->per_dir_config,
&proxy_module);
const char *fake;
const char *real;
if (r->proxyreq) {
/* someone has already set up the proxy, it was possibly ourselves
* in proxy_detect
*/
return OK;
}
/* XXX: since r->uri has been manipulated already we're not really
* compliant with RFC1945 at this point. But this probably isn't
* an issue because this is a hybrid proxy/origin server.
*/
for (i = 0; i < conf->aliases->nelts; i++) {
if (dconf->interpolate_env == 1) {
fake = proxy_interpolate(r, ent[i].fake);
real = proxy_interpolate(r, ent[i].real);
}
else {
fake = ent[i].fake;
real = ent[i].real;
}
len = alias_match(r->uri, fake);
if (len > 0) {
if ((real[0] == '!') && (real[1] == 0)) {
return DECLINED;
}
r->filename = apr_pstrcat(r->pool, "proxy:", real,
r->uri + len, NULL);
r->handler = "proxy-server";
r->proxyreq = PROXYREQ_REVERSE;
return OK;
}
}
return DECLINED;
}
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->server->lookup_defaults;
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;
for (j = 0; j < num_sec; ++j)
{
entry_config = sec_proxy[j];
entry_proxy = ap_get_module_config(entry_config, &proxy_module);
/* XXX: What about case insensitive matching ???
* Compare regex, fnmatch or string as appropriate
* If the entry doesn't relate, then continue
*/
if (entry_proxy->r
? ap_regexec(entry_proxy->r, proxyname, 0, NULL, 0)
: (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;
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)
{
char *url, *p;
int access_status;
proxy_dir_conf *dconf = ap_get_module_config(r->per_dir_config,
&proxy_module);
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? */
url = &r->filename[6];
if ((dconf->interpolate_env == 1) && (r->proxyreq == PROXYREQ_REVERSE)) {
/* create per-request copy of reverse proxy conf,
* and interpolate vars in it
*/
proxy_req_conf *rconf = apr_palloc(r->pool, sizeof(proxy_req_conf));
ap_set_module_config(r->request_config, &proxy_module, rconf);
rconf->raliases = proxy_vars(r, dconf->raliases);
rconf->cookie_paths = proxy_vars(r, dconf->cookie_paths);
rconf->cookie_domains = proxy_vars(r, dconf->cookie_domains);
}
/* canonicalise each specific scheme */
if ((access_status = proxy_run_canon_handler(r, url))) {
return access_status;
}
p = strchr(url, ':');
if (p == NULL || p == url)
return HTTP_BAD_REQUEST;
return OK; /* otherwise; we've done the best we can */
}
/* 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
|| strcasecmp(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_set(r->headers_out, "Location", nuri);
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
"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 i, rc, access_status;
int direct_connect = 0;
const char *str;
long 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;
/* is this for us? */
if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0)
return DECLINED;
/* handle max-forwards / OPTIONS / TRACE */
if ((str = apr_table_get(r->headers_in, "Max-Forwards"))) {
maxfwd = strtol(str, NULL, 10);
if (maxfwd < 1) {
switch (r->method_number) {
case M_TRACE: {
int access_status;
r->proxyreq = PROXYREQ_NONE;
if ((access_status = ap_send_http_trace(r)))
ap_die(access_status, r);
else
ap_finalize_request_protocol(r);
return OK;
}
case M_OPTIONS: {
int access_status;
r->proxyreq = PROXYREQ_NONE;
if ((access_status = ap_send_http_options(r)))
ap_die(access_status, r);
else
ap_finalize_request_protocol(r);
return OK;
}
default: {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Max-Forwards has reached zero - proxy loop?");
}
}
}
maxfwd = (maxfwd > 0) ? maxfwd - 1 : 0;
}
else {
/* set configured max-forwards */
maxfwd = conf->maxfwd;
}
apr_table_set(r->headers_in, "Max-Forwards",
apr_psprintf(r->pool, "%ld", (maxfwd > 0) ? maxfwd : 0));
if (r->method_number == M_TRACE) {
core_server_config *coreconf = (core_server_config *)
ap_get_module_config(sconf, &core_module);
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,
"proxy: TRACE forbidden by server configuration");
return HTTP_FORBIDDEN;
}
/* 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,
"proxy: TRACE with request body is not allowed");
return HTTP_REQUEST_ENTITY_TOO_LARGE;
}
}
uri = r->filename + 6;
p = strchr(uri, ':');
if (p == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"proxy_handler no URL in %s", r->filename);
return HTTP_BAD_REQUEST;
}
/* 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;
}
scheme = apr_pstrndup(r->pool, uri, p - uri);
/* 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) ? "NoProxy for %s" : "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;
}
if (balancer && balancer->max_attempts_set && !max_attempts)
max_attempts = balancer->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 && strcasecmp(scheme, ents[i].scheme) == 0) ||
(p2 != NULL &&
strncasecmp(url, ents[i].scheme,
strlen(ents[i].scheme)) == 0)) {
/* handle the scheme */
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
"Trying to run scheme_handler against proxy");
access_status = proxy_run_scheme_handler(r, worker,
conf, url,
ents[i].hostname,
ents[i].port);
/* an error or success */
if (access_status != DECLINED &&
access_status != HTTP_BAD_GATEWAY) {
goto cleanup;
}
/* we failed to talk to the upstream proxy */
}
}
}
/* 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_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
"Running scheme %s handler (attempt %d)",
scheme, attempts);
access_status = proxy_run_scheme_handler(r, worker, conf,
url, NULL, 0);
if (access_status == OK)
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_IN_ERROR;
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_IN_ERROR;
}
}
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_error(APLOG_MARK, APLOG_WARNING, 0, r->server,
"proxy: No protocol handler was valid for the URL %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);
access_status = HTTP_FORBIDDEN;
goto cleanup;
}
cleanup:
if (balancer) {
int post_status = proxy_run_post_request(worker, balancer, r, conf);
if (post_status == DECLINED) {
post_status = OK; /* no post_request handler available */
/* TODO: recycle direct worker */
}
}
proxy_run_request_status(&access_status, r);
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->allowed_connect_ports = apr_array_make(p, 10, sizeof(int));
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->viaopt = via_off; /* initially backward compatible with 1.3.1 */
ps->viaopt_set = 0; /* 0 means default */
ps->req = 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->error_override = 0;
ps->error_override_set = 0;
ps->preserve_host_set = 0;
ps->preserve_host = 0;
ps->timeout = 0;
ps->timeout_set = 0;
ps->badopt = bad_error;
ps->badopt_set = 0;
ps->pool = p;
return ps;
}
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->proxies = apr_array_append(p, base->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);
ps->allowed_connect_ports = apr_array_append(p, base->allowed_connect_ports, overrides->allowed_connect_ports);
ps->workers = apr_array_append(p, base->workers, overrides->workers);
ps->balancers = apr_array_append(p, base->balancers, overrides->balancers);
ps->forward = overrides->forward ? overrides->forward : base->forward;
ps->reverse = overrides->reverse ? overrides->reverse : base->reverse;
ps->domain = (overrides->domain == NULL) ? base->domain : overrides->domain;
ps->viaopt = (overrides->viaopt_set == 0) ? base->viaopt : overrides->viaopt;
ps->req = (overrides->req_set == 0) ? base->req : overrides->req;
ps->recv_buffer_size = (overrides->recv_buffer_size_set == 0) ? base->recv_buffer_size : overrides->recv_buffer_size;
ps->io_buffer_size = (overrides->io_buffer_size_set == 0) ? base->io_buffer_size : overrides->io_buffer_size;
ps->maxfwd = (overrides->maxfwd_set == 0) ? base->maxfwd : overrides->maxfwd;
ps->error_override = (overrides->error_override_set == 0) ? base->error_override : overrides->error_override;
ps->preserve_host = (overrides->preserve_host_set == 0) ? base->preserve_host : overrides->preserve_host;
ps->timeout= (overrides->timeout_set == 0) ? base->timeout : overrides->timeout;
ps->badopt = (overrides->badopt_set == 0) ? base->badopt : overrides->badopt;
ps->proxy_status = (overrides->proxy_status_set == 0) ? base->proxy_status : overrides->proxy_status;
ps->pool = p;
return ps;
}
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->cookie_path_str = apr_strmatch_precompile(p, "path=", 0);
new->cookie_domain_str = apr_strmatch_precompile(p, "domain=", 0);
new->interpolate_env = -1; /* unset */
return (void *) new;
}
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;
/* 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->cookie_path_str = base->cookie_path_str;
new->cookie_domain_str = base->cookie_domain_str;
new->interpolate_env = (add->interpolate_env == -1) ? base->interpolate_env
: add->interpolate_env;
return new;
}
static const char *
add_proxy(cmd_parms *cmd, void *dummy, const char *f1, const char *r1, 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;
return NULL;
}
static const char *
add_proxy_noregex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1)
{
return add_proxy(cmd, dummy, f1, r1, 0);
}
static const char *
add_proxy_regex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1)
{
return add_proxy(cmd, dummy, f1, r1, 1);
}
static const char *
add_pass(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);
struct proxy_alias *new;
char *f = cmd->path;
char *r = NULL;
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;
while (*arg) {
word = ap_getword_conf(cmd->pool, &arg);
if (!f)
f = word;
else if (!r)
r = word;
else {
char *val = strchr(word, '=');
if (!val) {
if (cmd->path)
return "Invalid ProxyPass parameter. Parameter must be "
"in the form 'key=value'";
else
return "ProxyPass can not have a path when defined in a location";
}
else
*val++ = '\0';
apr_table_setn(params, word, val);
}
};
if (r == NULL)
return "ProxyPass needs a path when not defined in a location";
new = apr_array_push(conf->aliases);
new->fake = apr_pstrdup(cmd->pool, f);
new->real = apr_pstrdup(cmd->pool, r);
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 (strncasecmp(r, "balancer:", 9) == 0) {
proxy_balancer *balancer = ap_proxy_get_balancer(cmd->pool, conf, r);
if (!balancer) {
const char *err = ap_proxy_add_balancer(&balancer,
cmd->pool,
conf, r);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
}
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);
}
}
else {
proxy_worker *worker = ap_proxy_get_worker(cmd->temp_pool, conf, r);
if (!worker) {
const char *err = ap_proxy_add_worker(&worker, cmd->pool, conf, r);
if (err)
return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server,
"worker %s already used by another worker", worker->name);
}
PROXY_COPY_CONF_PARAMS(worker, conf);
for (i = 0; i < arr->nelts; i++) {
const char *err = set_worker_param(cmd->pool, 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_reverse(cmd_parms *cmd, void *dconf, const char *f, const char *r)
{
proxy_dir_conf *conf = dconf;
struct proxy_alias *new;
if (r!=NULL && cmd->path == NULL ) {
new = apr_array_push(conf->raliases);
new->fake = f;
new->real = r;
} else if (r==NULL && cmd->path != NULL) {
new = apr_array_push(conf->raliases);
new->fake = cmd->path;
new->real = f;
} else {
if ( r == NULL)
return "ProxyPassReverse needs a path when not defined in a location";
else
return "ProxyPassReverse can not have a path when defined in a location";
}
return NULL;
}
static const char*
cookie_path(cmd_parms *cmd, void *dconf, const char *f, const char *r)
{
proxy_dir_conf *conf = dconf;
struct proxy_alias *new;
new = apr_array_push(conf->cookie_paths);
new->fake = f;
new->real = r;
return NULL;
}
static const char*
cookie_domain(cmd_parms *cmd, void *dconf, const char *f, const char *r)
{
proxy_dir_conf *conf = dconf;
struct proxy_alias *new;
new = apr_array_push(conf->cookie_domains);
new->fake = f;
new->real = r;
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;
}
}
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;
}
/*
* Set the ports CONNECT can use
*/
static const char *
set_allowed_ports(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);
int *New;
if (!apr_isdigit(arg[0]))
return "AllowCONNECT: port number must be numeric";
New = apr_array_push(conf->allowed_connect_ports);
*New = atoi(arg);
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;
}
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,
"Parsed addr %s", inet_ntoa(New->addr));
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
"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,
"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,
"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;
if (flag && !psf->forward) {
psf->forward = ap_proxy_create_worker(parms->pool);
psf->forward->name = "proxy:forward";
psf->forward->hostname = "*";
psf->forward->scheme = "*";
}
return NULL;
}
static const char *
set_proxy_error_override(cmd_parms *parms, void *dummy, int flag)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
psf->error_override = flag;
psf->error_override_set = 1;
return NULL;
}
static const char *
set_preserve_host(cmd_parms *parms, void *dummy, int flag)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
psf->preserve_host = flag;
psf->preserve_host_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);
psf->io_buffer_size = ((s > AP_IOBUFSIZE) ? 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);
if (s < 0) {
return "ProxyMaxForwards must be greater or equal to zero..";
}
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 *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;
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;
if (cmd->path)
path = apr_pstrdup(cmd->pool, cmd->path);
while (*arg) {
word = ap_getword_conf(cmd->pool, &arg);
if (!path)
path = word;
else if (!name)
name = word;
else {
char *val = strchr(word, '=');
if (!val)
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";
ap_str_tolower(path); /* lowercase scheme://hostname */
/* Try to find existing worker */
worker = ap_proxy_get_worker(cmd->temp_pool, conf, name);
if (!worker) {
const char *err;
if ((err = ap_proxy_add_worker(&worker, cmd->pool, conf, name)) != NULL)
return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
} else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server,
"worker %s already used by another worker", worker->name);
}
PROXY_COPY_CONF_PARAMS(worker, conf);
arr = apr_table_elts(params);
elts = (const apr_table_entry_t *)arr->elts;
for (i = 0; i < arr->nelts; i++) {
const char *err = set_worker_param(cmd->pool, worker, elts[i].key,
elts[i].val);
if (err)
return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
}
/* Try to find the balancer */
balancer = ap_proxy_get_balancer(cmd->temp_pool, conf, path);
if (!balancer) {
const char *err = ap_proxy_add_balancer(&balancer,
cmd->pool,
conf, path);
if (err)
return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
}
/* Add the worker to the load balancer */
ap_proxy_add_worker_to_balancer(cmd->pool, balancer, worker);
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;
const char *err;
int in_proxy_section = 0;
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';
in_proxy_section = 1;
}
else {
/* Standard set directive with worker/balancer
* name as first param.
*/
name = ap_getword_conf(cmd->temp_pool, &arg);
}
if (strncasecmp(name, "balancer:", 9) == 0) {
balancer = ap_proxy_get_balancer(cmd->pool, conf, name);
if (!balancer) {
if (in_proxy_section) {
err = ap_proxy_add_balancer(&balancer,
cmd->pool,
conf, name);
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 {
worker = ap_proxy_get_worker(cmd->temp_pool, conf, name);
if (!worker) {
if (in_proxy_section) {
err = ap_proxy_add_worker(&worker, cmd->pool,
conf, name);
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, 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;
const char *err = ap_check_cmd_context(cmd,
NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT);
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;
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";
}
}
else if (!strcmp(cmd->path, "~")) {
cmd->path = ap_getword_conf(cmd->pool, &arg);
if (!cmd->path)
return "<Proxy ~ > block must specify a path";
if (strncasecmp(cmd->path, "proxy:", 6))
cmd->path += 6;
r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED);
if (!r) {
return "Regex could not be compiled";
}
}
/* 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);
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 (!strchr(conf->p, ':'))
return apr_pstrcat(cmd->pool, thiscmd->name,
"> arguments are not supported for non url.",
NULL);
if (strncasecmp(conf->p, "balancer:", 9) == 0) {
balancer = ap_proxy_get_balancer(cmd->pool, sconf, conf->p);
if (!balancer) {
err = ap_proxy_add_balancer(&balancer,
cmd->pool,
sconf, conf->p);
if (err)
return apr_pstrcat(cmd->temp_pool, thiscmd->name,
" ", err, NULL);
}
}
else {
worker = ap_proxy_get_worker(cmd->temp_pool, sconf,
conf->p);
if (!worker) {
err = ap_proxy_add_worker(&worker, cmd->pool,
sconf, conf->p);
if (err)
return apr_pstrcat(cmd->temp_pool, thiscmd->name,
" ", err, NULL);
}
}
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, 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_TAKE2("ProxyRemote", add_proxy_noregex, NULL, RSRC_CONF,
"a scheme, partial URL or '*' and a proxy server"),
AP_INIT_TAKE2("ProxyRemoteMatch", add_proxy_regex, NULL, RSRC_CONF,
"a regex pattern and a proxy server"),
AP_INIT_FLAG("ProxyPassInterpolateEnv", ap_set_flag_slot,
(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, NULL, RSRC_CONF|ACCESS_CONF,
"a virtual path and a URL"),
AP_INIT_TAKE12("ProxyPassReverse", add_pass_reverse, NULL, RSRC_CONF|ACCESS_CONF,
"a virtual path and a URL for reverse proxy behaviour"),
AP_INIT_TAKE2("ProxyPassReverseCookiePath", cookie_path, NULL,
RSRC_CONF|ACCESS_CONF, "Path rewrite rule for proxying cookies"),
AP_INIT_TAKE2("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_ITERATE("AllowCONNECT", set_allowed_ports, NULL, RSRC_CONF,
"A list of ports which CONNECT may connect to"),
AP_INIT_TAKE1("ProxyVia", set_via_opt, NULL, RSRC_CONF,
"Configure Via: proxy header header to one of: on | off | block | full"),
AP_INIT_FLAG("ProxyErrorOverride", set_proxy_error_override, NULL, RSRC_CONF,
"use our error handling pages instead of the servers' we are proxying"),
AP_INIT_FLAG("ProxyPreserveHost", set_preserve_host, NULL, RSRC_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("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"),
{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_is_https) *proxy_is_https = NULL;
static APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *proxy_ssl_val = 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 (proxy_ssl_enable) {
return c ? proxy_ssl_enable(c) : 1;
}
return 0;
}
PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c)
{
if (proxy_ssl_disable) {
return proxy_ssl_disable(c);
}
return 0;
}
PROXY_DECLARE(int) ap_proxy_conn_is_https(conn_rec *c)
{
if (proxy_is_https) {
return proxy_is_https(c);
}
else
return 0;
}
PROXY_DECLARE(const char *) ap_proxy_ssl_val(apr_pool_t *p, server_rec *s,
conn_rec *c, request_rec *r,
const char *var)
{
if (proxy_ssl_val) {
/* XXX Perhaps the casting useless */
return (const char *)proxy_ssl_val(p, s, c, r, (char *)var);
}
else
return NULL;
}
static int proxy_post_config(apr_pool_t *pconf, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *s)
{
proxy_ssl_enable = APR_RETRIEVE_OPTIONAL_FN(ssl_proxy_enable);
proxy_ssl_disable = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_disable);
proxy_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https);
proxy_ssl_val = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup);
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 (flags & AP_STATUS_SHORT || 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++) {
ap_rputs("<hr />\n<h1>Proxy LoadBalancer Status for ", r);
ap_rvputs(r, balancer->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);
ap_rvputs(r, "<td>", balancer->sticky, NULL);
ap_rprintf(r, "</td><td>%" APR_TIME_T_FMT "</td>",
apr_time_sec(balancer->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>Wr</th><th>Rd</th>"
"</tr>\n", r);
worker = (proxy_worker *)balancer->workers->elts;
for (n = 0; n < balancer->workers->nelts; n++) {
char fbuf[50];
ap_rvputs(r, "<tr>\n<td>", worker->scheme, "</td>", NULL);
ap_rvputs(r, "<td>", worker->hostname, "</td><td>", NULL);
if (worker->s->status & PROXY_WORKER_DISABLED)
ap_rputs("Dis", r);
else if (worker->s->status & PROXY_WORKER_IN_ERROR)
ap_rputs("Err", r);
else if (worker->s->status & PROXY_WORKER_INITIALIZED)
ap_rputs("Ok", r);
else
ap_rputs("-", r);
ap_rvputs(r, "</td><td>", worker->s->route, NULL);
ap_rvputs(r, "</td><td>", worker->s->redirect, NULL);
ap_rprintf(r, "</td><td>%d</td>", worker->s->lbfactor);
ap_rprintf(r, "<td>%d</td>", worker->s->lbset);
ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td><td>", worker->s->elected);
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);
++worker;
}
ap_rputs("</table>\n", r);
++balancer;
}
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 in %</td></tr>\n"
"<tr><th>Acc</th><td>Number of requests</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_worker *reverse = NULL;
while (s) {
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);
/* Initialize worker's shared scoreboard data */
worker = (proxy_worker *)conf->workers->elts;
for (i = 0; i < conf->workers->nelts; i++) {
ap_proxy_initialize_worker_share(conf, worker, s);
ap_proxy_initialize_worker(worker, s);
worker++;
}
/* Initialize forward worker if defined */
if (conf->forward) {
ap_proxy_initialize_worker_share(conf, conf->forward, s);
ap_proxy_initialize_worker(conf->forward, s);
/* Do not disable worker in case of errors */
conf->forward->s->status |= PROXY_WORKER_IGNORE_ERRORS;
/* Disable address cache for generic forward worker */
conf->forward->is_address_reusable = 0;
}
if (!reverse) {
reverse = ap_proxy_create_worker(p);
reverse->name = "proxy:reverse";
reverse->hostname = "*";
reverse->scheme = "*";
ap_proxy_initialize_worker_share(conf, reverse, s);
ap_proxy_initialize_worker(reverse, s);
/* Do not disable worker in case of errors */
reverse->s->status |= PROXY_WORKER_IGNORE_ERRORS;
/* Disable address cache for generic reverse worker */
reverse->is_address_reusable = 0;
}
conf->reverse = reverse;
s = s->next;
}
}
/*
* This routine is called before the server processes the configuration
* files. There is no return value.
*/
static int proxy_pre_config(apr_pool_t *pconf, apr_pool_t *plog,
apr_pool_t *ptemp)
{
APR_OPTIONAL_HOOK(ap, status_hook, proxy_status_hook, NULL, NULL,
APR_HOOK_MIDDLE);
/* Reset workers count on gracefull restart */
proxy_lb_workers = 0;
return OK;
}
static void register_hooks(apr_pool_t *p)
{
/* fixup before mod_rewrite, so that the proxied url will not
* escaped accidentally by our fixup.
*/
static const char * const aszSucc[]={ "mod_rewrite.c", NULL };
/* 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", NULL};
APR_REGISTER_OPTIONAL_FN(ap_proxy_lb_workers);
/* handler */
ap_hook_handler(proxy_handler, NULL, NULL, APR_HOOK_FIRST);
/* filename-to-URI translation */
ap_hook_translate_name(proxy_trans, aszSucc, 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);
/* fixups */
ap_hook_fixups(proxy_fixup, NULL, aszSucc, 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);
}
module AP_MODULE_DECLARE_DATA proxy_module =
{
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_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, 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, 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)