From 6beeb1b708550be0d4a53b272283e17e5e35fe17 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:01:30 +0200 Subject: Adding upstream version 2.4.57. Signed-off-by: Daniel Baumann --- modules/proxy/mod_proxy_express.c | 250 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 250 insertions(+) create mode 100644 modules/proxy/mod_proxy_express.c (limited to 'modules/proxy/mod_proxy_express.c') diff --git a/modules/proxy/mod_proxy_express.c b/modules/proxy/mod_proxy_express.c new file mode 100644 index 0000000..5d458c4 --- /dev/null +++ b/modules/proxy/mod_proxy_express.c @@ -0,0 +1,250 @@ +/* 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 "apr_dbm.h" + +module AP_MODULE_DECLARE_DATA proxy_express_module; + +#include "apr_version.h" +#if !APR_VERSION_AT_LEAST(2,0,0) +#include "apu_version.h" +#endif + +static int proxy_available = 0; + +typedef struct { + const char *dbmfile; + const char *dbmtype; + int enabled; +} express_server_conf; + +static const char *set_dbmfile(cmd_parms *cmd, + void *dconf, + const char *arg) +{ + express_server_conf *sconf; + sconf = ap_get_module_config(cmd->server->module_config, &proxy_express_module); + + if ((sconf->dbmfile = ap_server_root_relative(cmd->pool, arg)) == NULL) { + return apr_pstrcat(cmd->pool, "ProxyExpressDBMFile: bad path to file: ", + arg, NULL); + } + return NULL; +} + +static const char *set_dbmtype(cmd_parms *cmd, + void *dconf, + const char *arg) +{ + express_server_conf *sconf; + sconf = ap_get_module_config(cmd->server->module_config, &proxy_express_module); + + sconf->dbmtype = arg; + + return NULL; +} + +static const char *set_enabled(cmd_parms *cmd, + void *dconf, + int flag) +{ + express_server_conf *sconf; + sconf = ap_get_module_config(cmd->server->module_config, &proxy_express_module); + + sconf->enabled = flag; + + return NULL; +} + +static void *server_create(apr_pool_t *p, server_rec *s) +{ + express_server_conf *a; + + a = (express_server_conf *)apr_pcalloc(p, sizeof(express_server_conf)); + + a->dbmfile = NULL; + a->dbmtype = "default"; + a->enabled = 0; + + return (void *)a; +} + +static void *server_merge(apr_pool_t *p, void *basev, void *overridesv) +{ + express_server_conf *a, *base, *overrides; + + a = (express_server_conf *)apr_pcalloc(p, + sizeof(express_server_conf)); + base = (express_server_conf *)basev; + overrides = (express_server_conf *)overridesv; + + a->dbmfile = (overrides->dbmfile) ? overrides->dbmfile : base->dbmfile; + a->dbmtype = (overrides->dbmtype) ? overrides->dbmtype : base->dbmtype; + a->enabled = (overrides->enabled) ? overrides->enabled : base->enabled; + + return (void *)a; +} + +static int post_config(apr_pool_t *p, + apr_pool_t *plog, + apr_pool_t *ptemp, + server_rec *s) +{ + proxy_available = (ap_find_linked_module("mod_proxy.c") != NULL); + return OK; +} + + +static int xlate_name(request_rec *r) +{ + int i; + const char *name; + char *backend = NULL; + apr_dbm_t *db; + apr_status_t rv; + apr_datum_t key, val; + struct proxy_alias *ralias; + proxy_dir_conf *dconf; + express_server_conf *sconf; +#if APU_MAJOR_VERSION > 1 || (APU_MAJOR_VERSION == 1 && APU_MINOR_VERSION >= 7) + const apr_dbm_driver_t *driver; + const apu_err_t *err; +#endif + + sconf = ap_get_module_config(r->server->module_config, &proxy_express_module); + dconf = ap_get_module_config(r->per_dir_config, &proxy_module); + + if (!sconf->enabled) { + return DECLINED; + } + + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01001) "proxy_express: Enabled"); + if (!sconf->dbmfile || (r->filename && strncmp(r->filename, "proxy:", 6) == 0)) { + /* it should be go on as an internal proxy request */ + return DECLINED; + } + + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01002) + "proxy_express: Opening DBM file: %s (%s)", + sconf->dbmfile, sconf->dbmtype); + +#if APU_MAJOR_VERSION > 1 || (APU_MAJOR_VERSION == 1 && APU_MINOR_VERSION >= 7) + rv = apr_dbm_get_driver(&driver, sconf->dbmtype, &err, r->pool); + if (rv != APR_SUCCESS) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, + APLOGNO(10275) "The dbm library '%s' could not be loaded: %s (%s: %d)", + sconf->dbmtype, err->msg, err->reason, err->rc); + return DECLINED; + } + + rv = apr_dbm_open2(&db, driver, sconf->dbmfile, APR_DBM_READONLY, + APR_OS_DEFAULT, r->pool); + if (rv != APR_SUCCESS) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, + APLOGNO(10276) "The '%s' file '%s' could not be loaded", + sconf->dbmtype, sconf->dbmfile); + return DECLINED; + } +#else + rv = apr_dbm_open_ex(&db, sconf->dbmtype, sconf->dbmfile, APR_DBM_READONLY, + APR_OS_DEFAULT, r->pool); + if (rv != APR_SUCCESS) { + return DECLINED; + } +#endif + + name = ap_get_server_name(r); + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01003) + "proxy_express: looking for %s", name); + key.dptr = (char *)name; + key.dsize = strlen(key.dptr); + + rv = apr_dbm_fetch(db, key, &val); + if (rv == APR_SUCCESS) { + backend = apr_pstrmemdup(r->pool, val.dptr, val.dsize); + } + apr_dbm_close(db); + if (rv != APR_SUCCESS || !backend) { + return DECLINED; + } + + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01004) + "proxy_express: found %s -> %s", name, backend); + r->filename = apr_pstrcat(r->pool, "proxy:", backend, r->uri, NULL); + r->handler = "proxy-server"; + r->proxyreq = PROXYREQ_REVERSE; + + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01005) + "proxy_express: rewritten as: %s", r->filename); + + ralias = (struct proxy_alias *)dconf->raliases->elts; + /* + * See if we have already added a ProxyPassReverse entry + * for this host... If so, don't do it again. + */ + /* + * NOTE: dconf is process specific so this will only + * work as long as we maintain that this process + * or thread is handling the backend + */ + for (i = 0; i < dconf->raliases->nelts; i++, ralias++) { + if (strcasecmp(backend, ralias->real) == 0) { + ralias = NULL; + break; + } + } + + /* Didn't find one... add it */ + if (!ralias) { + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01006) + "proxy_express: adding PPR entry"); + ralias = apr_array_push(dconf->raliases); + ralias->fake = "/"; + ralias->real = apr_pstrdup(dconf->raliases->pool, backend); + ralias->flags = 0; + } + return OK; +} + +static const command_rec command_table[] = { + AP_INIT_FLAG("ProxyExpressEnable", set_enabled, NULL, OR_FILEINFO, + "Enable the ProxyExpress functionality"), + AP_INIT_TAKE1("ProxyExpressDBMFile", set_dbmfile, NULL, OR_FILEINFO, + "Location of ProxyExpressDBMFile file"), + AP_INIT_TAKE1("ProxyExpressDBMType", set_dbmtype, NULL, OR_FILEINFO, + "Type of ProxyExpressDBMFile file"), + { NULL } +}; + +static void register_hooks(apr_pool_t *p) +{ + ap_hook_post_config(post_config, NULL, NULL, APR_HOOK_LAST); + ap_hook_translate_name(xlate_name, NULL, NULL, APR_HOOK_FIRST); +} + +/* the main config structure */ + +AP_DECLARE_MODULE(proxy_express) = +{ + STANDARD20_MODULE_STUFF, + NULL, /* create per-dir config structures */ + NULL, /* merge per-dir config structures */ + server_create, /* create per-server config structures */ + server_merge, /* merge per-server config structures */ + command_table, /* table of config file commands */ + register_hooks /* register hooks */ +}; -- cgit v1.2.3