| /* Copyright 1999-2004 The Apache Software Foundation |
| * |
| * Licensed 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. |
| */ |
| |
| /* HTTP routines for Apache proxy */ |
| |
| #include "mod_proxy.h" |
| |
| module AP_MODULE_DECLARE_DATA proxy_http_module; |
| |
| int ap_proxy_http_canon(request_rec *r, char *url); |
| int ap_proxy_http_handler(request_rec *r, proxy_worker *worker, |
| proxy_server_conf *conf, |
| char *url, const char *proxyname, |
| apr_port_t proxyport); |
| |
| static apr_status_t ap_proxy_http_cleanup(const char *scheme, |
| request_rec *r, |
| proxy_conn_rec *backend); |
| |
| /* |
| * Canonicalise http-like URLs. |
| * scheme is the scheme for the URL |
| * url is the URL starting with the first '/' |
| * def_port is the default port for this scheme. |
| */ |
| int ap_proxy_http_canon(request_rec *r, char *url) |
| { |
| char *host, *path, *search, sport[7]; |
| const char *err; |
| const char *scheme; |
| apr_port_t port, def_port; |
| |
| /* ap_port_of_scheme() */ |
| if (strncasecmp(url, "http:", 5) == 0) { |
| url += 5; |
| scheme = "http"; |
| } |
| else if (strncasecmp(url, "https:", 6) == 0) { |
| url += 6; |
| scheme = "https"; |
| } |
| else { |
| return DECLINED; |
| } |
| def_port = apr_uri_port_of_scheme(scheme); |
| |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: HTTP: canonicalising URL %s", url); |
| |
| /* do syntatic check. |
| * We break the URL into host, port, path, search |
| */ |
| port = def_port; |
| err = ap_proxy_canon_netloc(r->pool, &url, NULL, NULL, &host, &port); |
| if (err) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, |
| "error parsing URL %s: %s", |
| url, err); |
| return HTTP_BAD_REQUEST; |
| } |
| |
| /* now parse path/search args, according to rfc1738 */ |
| /* N.B. if this isn't a true proxy request, then the URL _path_ |
| * has already been decoded. True proxy requests have r->uri |
| * == r->unparsed_uri, and no others have that property. |
| */ |
| if (r->uri == r->unparsed_uri) { |
| search = strchr(url, '?'); |
| if (search != NULL) |
| *(search++) = '\0'; |
| } |
| else |
| search = r->args; |
| |
| /* process path */ |
| path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, r->proxyreq); |
| if (path == NULL) |
| return HTTP_BAD_REQUEST; |
| |
| if (port != def_port) |
| apr_snprintf(sport, sizeof(sport), ":%d", port); |
| else |
| sport[0] = '\0'; |
| |
| if (ap_strchr_c(host, ':')) { /* if literal IPv6 address */ |
| host = apr_pstrcat(r->pool, "[", host, "]", NULL); |
| } |
| r->filename = apr_pstrcat(r->pool, "proxy:", scheme, "://", host, sport, |
| "/", path, (search) ? "?" : "", (search) ? search : "", NULL); |
| return OK; |
| } |
| |
| static const char *ap_proxy_location_reverse_map(request_rec *r, proxy_server_conf *conf, const char *url) |
| { |
| struct proxy_alias *ent; |
| int i, l1, l2; |
| char *u; |
| |
| /* XXX FIXME: Make sure this handled the ambiguous case of the :80 |
| * after the hostname */ |
| |
| l1 = strlen(url); |
| ent = (struct proxy_alias *)conf->raliases->elts; |
| for (i = 0; i < conf->raliases->nelts; i++) { |
| l2 = strlen(ent[i].real); |
| if (l1 >= l2 && strncasecmp(ent[i].real, url, l2) == 0) { |
| u = apr_pstrcat(r->pool, ent[i].fake, &url[l2], NULL); |
| return ap_construct_url(r->pool, u, r); |
| } |
| } |
| return url; |
| } |
| /* cookies are a bit trickier to match: we've got two substrings to worry |
| * about, and we can't just find them with strstr 'cos of case. Regexp |
| * matching would be an easy fix, but for better consistency with all the |
| * other matches we'll refrain and use apr_strmatch to find path=/domain= |
| * and stick to plain strings for the config values. |
| */ |
| static const char *proxy_cookie_reverse_map(request_rec *r, |
| proxy_server_conf *conf, const char *str) |
| { |
| struct proxy_alias *ent; |
| size_t len = strlen(str); |
| const char* newpath = NULL ; |
| const char* newdomain = NULL ; |
| const char* pathp ; |
| const char* domainp ; |
| const char* pathe = NULL; |
| const char* domaine = NULL; |
| size_t l1, l2, poffs = 0, doffs = 0 ; |
| int i; |
| int ddiff = 0 ; |
| int pdiff = 0 ; |
| char* ret ; |
| |
| /* find the match and replacement, but save replacing until we've done |
| both path and domain so we know the new strlen |
| */ |
| if ( pathp = apr_strmatch(conf->cookie_path_str, str, len) , pathp ) { |
| pathp += 5 ; |
| poffs = pathp - str ; |
| pathe = ap_strchr_c(pathp, ';') ; |
| l1 = pathe ? (pathe-pathp) : strlen(pathp) ; |
| pathe = pathp + l1 ; |
| ent = (struct proxy_alias *)conf->cookie_paths->elts; |
| for (i = 0; i < conf->cookie_paths->nelts; i++) { |
| l2 = strlen(ent[i].fake); |
| if (l1 >= l2 && strncmp(ent[i].fake, pathp, l2) == 0) { |
| newpath = ent[i].real ; |
| pdiff = strlen(newpath) - l1 ; |
| break ; |
| } |
| } |
| } |
| if ( domainp = apr_strmatch(conf->cookie_domain_str, str, len) , domainp ) { |
| domainp += 7 ; |
| doffs = domainp - str ; |
| domaine = ap_strchr_c(domainp, ';') ; |
| l1 = domaine ? (domaine-domainp) : strlen(domainp) ; |
| domaine = domainp + l1 ; |
| ent = (struct proxy_alias *)conf->cookie_domains->elts; |
| for (i = 0; i < conf->cookie_domains->nelts; i++) { |
| l2 = strlen(ent[i].fake); |
| if (l1 >= l2 && strncasecmp(ent[i].fake, domainp, l2) == 0) { |
| newdomain = ent[i].real ; |
| ddiff = strlen(newdomain) - l1 ; |
| break ; |
| } |
| } |
| } |
| if ( newpath ) { |
| ret = apr_palloc(r->pool, len+pdiff+ddiff+1) ; |
| l1 = strlen(newpath) ; |
| if ( newdomain ) { |
| l2 = strlen(newdomain) ; |
| if ( doffs > poffs ) { |
| memcpy(ret, str, poffs) ; |
| memcpy(ret+poffs, newpath, l1) ; |
| memcpy(ret+poffs+l1, pathe, domainp-pathe) ; |
| memcpy(ret+doffs+pdiff, newdomain, l2) ; |
| strcpy(ret+doffs+pdiff+l2, domaine) ; |
| } else { |
| memcpy(ret, str, doffs) ; |
| memcpy(ret+doffs, newdomain, l2) ; |
| memcpy(ret+doffs+l2, domaine, pathp-domaine) ; |
| memcpy(ret+poffs+ddiff, newpath, l1) ; |
| strcpy(ret+poffs+ddiff+l1, pathe) ; |
| } |
| } else { |
| memcpy(ret, str, poffs) ; |
| memcpy(ret+poffs, newpath, l1) ; |
| strcpy(ret+poffs+l1, pathe) ; |
| } |
| } else { |
| if ( newdomain ) { |
| ret = apr_palloc(r->pool, len+pdiff+ddiff+1) ; |
| l2 = strlen(newdomain) ; |
| memcpy(ret, str, doffs) ; |
| memcpy(ret+doffs, newdomain, l2) ; |
| strcpy(ret+doffs+l2, domaine) ; |
| } else { |
| ret = (char*) str ; /* no change */ |
| } |
| } |
| return ret ; |
| } |
| |
| /* Clear all connection-based headers from the incoming headers table */ |
| static void ap_proxy_clear_connection(apr_pool_t *p, apr_table_t *headers) |
| { |
| const char *name; |
| char *next = apr_pstrdup(p, apr_table_get(headers, "Connection")); |
| |
| apr_table_unset(headers, "Proxy-Connection"); |
| if (!next) |
| return; |
| |
| while (*next) { |
| name = next; |
| while (*next && !apr_isspace(*next) && (*next != ',')) { |
| ++next; |
| } |
| while (*next && (apr_isspace(*next) || (*next == ','))) { |
| *next = '\0'; |
| ++next; |
| } |
| apr_table_unset(headers, name); |
| } |
| apr_table_unset(headers, "Connection"); |
| } |
| |
| static |
| apr_status_t ap_proxy_http_request(apr_pool_t *p, request_rec *r, |
| proxy_conn_rec *conn, conn_rec *origin, |
| proxy_server_conf *conf, |
| apr_uri_t *uri, |
| char *url, char *server_portstr) |
| { |
| conn_rec *c = r->connection; |
| char *buf; |
| apr_bucket *e, *last_header_bucket = NULL; |
| const apr_array_header_t *headers_in_array; |
| const apr_table_entry_t *headers_in; |
| int counter, seen_eos, send_chunks; |
| apr_status_t status; |
| apr_bucket_brigade *header_brigade, *body_brigade, *input_brigade; |
| |
| header_brigade = apr_brigade_create(p, origin->bucket_alloc); |
| body_brigade = apr_brigade_create(p, origin->bucket_alloc); |
| input_brigade = apr_brigade_create(p, origin->bucket_alloc); |
| |
| /* |
| * Send the HTTP/1.1 request to the remote server |
| */ |
| |
| /* strip connection listed hop-by-hop headers from the request */ |
| /* even though in theory a connection: close coming from the client |
| * should not affect the connection to the server, it's unlikely |
| * that subsequent client requests will hit this thread/process, so |
| * we cancel server keepalive if the client does. |
| */ |
| conn->close += ap_proxy_liststr(apr_table_get(r->headers_in, |
| "Connection"), "close"); |
| |
| /* sub-requests never use keepalives */ |
| if (r->main) { |
| conn->close++; |
| } |
| |
| ap_proxy_clear_connection(p, r->headers_in); |
| if (conn->close) { |
| apr_table_setn(r->headers_in, "Connection", "close"); |
| origin->keepalive = AP_CONN_CLOSE; |
| } |
| |
| /* By default, we can not send chunks. That means we must buffer |
| * the entire request before sending it along to ensure we have |
| * the correct Content-Length attached. |
| */ |
| send_chunks = 0; |
| |
| if (apr_table_get(r->subprocess_env, "force-proxy-request-1.0")) { |
| buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.0" CRLF, NULL); |
| } else { |
| buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.1" CRLF, NULL); |
| if (apr_table_get(r->subprocess_env, "proxy-sendchunks")) { |
| send_chunks = 1; |
| } |
| } |
| if (apr_table_get(r->subprocess_env, "proxy-nokeepalive")) { |
| apr_table_unset(r->headers_in, "Connection"); |
| origin->keepalive = AP_CONN_CLOSE; |
| } |
| ap_xlate_proto_to_ascii(buf, strlen(buf)); |
| e = apr_bucket_pool_create(buf, strlen(buf), p, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(header_brigade, e); |
| if (conf->preserve_host == 0) { |
| if (uri->port_str && uri->port != DEFAULT_HTTP_PORT) { |
| buf = apr_pstrcat(p, "Host: ", uri->hostname, ":", uri->port_str, |
| CRLF, NULL); |
| } else { |
| buf = apr_pstrcat(p, "Host: ", uri->hostname, CRLF, NULL); |
| } |
| } |
| else { |
| /* don't want to use r->hostname, as the incoming header might have a |
| * port attached |
| */ |
| const char* hostname = apr_table_get(r->headers_in,"Host"); |
| if (!hostname) { |
| hostname = r->server->server_hostname; |
| ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, |
| "proxy: no HTTP 0.9 request (with no host line) " |
| "on incoming request and preserve host set " |
| "forcing hostname to be %s for uri %s", |
| hostname, |
| r->uri ); |
| } |
| buf = apr_pstrcat(p, "Host: ", hostname, CRLF, NULL); |
| } |
| ap_xlate_proto_to_ascii(buf, strlen(buf)); |
| e = apr_bucket_pool_create(buf, strlen(buf), p, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(header_brigade, e); |
| |
| /* handle Via */ |
| if (conf->viaopt == via_block) { |
| /* Block all outgoing Via: headers */ |
| apr_table_unset(r->headers_in, "Via"); |
| } else if (conf->viaopt != via_off) { |
| const char *server_name = ap_get_server_name(r); |
| /* If USE_CANONICAL_NAME_OFF was configured for the proxy virtual host, |
| * then the server name returned by ap_get_server_name() is the |
| * origin server name (which does make too much sense with Via: headers) |
| * so we use the proxy vhost's name instead. |
| */ |
| if (server_name == r->hostname) |
| server_name = r->server->server_hostname; |
| /* Create a "Via:" request header entry and merge it */ |
| /* Generate outgoing Via: header with/without server comment: */ |
| apr_table_mergen(r->headers_in, "Via", |
| (conf->viaopt == via_full) |
| ? apr_psprintf(p, "%d.%d %s%s (%s)", |
| HTTP_VERSION_MAJOR(r->proto_num), |
| HTTP_VERSION_MINOR(r->proto_num), |
| server_name, server_portstr, |
| AP_SERVER_BASEVERSION) |
| : apr_psprintf(p, "%d.%d %s%s", |
| HTTP_VERSION_MAJOR(r->proto_num), |
| HTTP_VERSION_MINOR(r->proto_num), |
| server_name, server_portstr) |
| ); |
| } |
| |
| /* X-Forwarded-*: handling |
| * |
| * XXX Privacy Note: |
| * ----------------- |
| * |
| * These request headers are only really useful when the mod_proxy |
| * is used in a reverse proxy configuration, so that useful info |
| * about the client can be passed through the reverse proxy and on |
| * to the backend server, which may require the information to |
| * function properly. |
| * |
| * In a forward proxy situation, these options are a potential |
| * privacy violation, as information about clients behind the proxy |
| * are revealed to arbitrary servers out there on the internet. |
| * |
| * The HTTP/1.1 Via: header is designed for passing client |
| * information through proxies to a server, and should be used in |
| * a forward proxy configuation instead of X-Forwarded-*. See the |
| * ProxyVia option for details. |
| */ |
| |
| if (PROXYREQ_REVERSE == r->proxyreq) { |
| const char *buf; |
| |
| /* Add X-Forwarded-For: so that the upstream has a chance to |
| * determine, where the original request came from. |
| */ |
| apr_table_mergen(r->headers_in, "X-Forwarded-For", |
| r->connection->remote_ip); |
| |
| /* Add X-Forwarded-Host: so that upstream knows what the |
| * original request hostname was. |
| */ |
| if ((buf = apr_table_get(r->headers_in, "Host"))) { |
| apr_table_mergen(r->headers_in, "X-Forwarded-Host", buf); |
| } |
| |
| /* Add X-Forwarded-Server: so that upstream knows what the |
| * name of this proxy server is (if there are more than one) |
| * XXX: This duplicates Via: - do we strictly need it? |
| */ |
| apr_table_mergen(r->headers_in, "X-Forwarded-Server", |
| r->server->server_hostname); |
| } |
| |
| /* send request headers */ |
| proxy_run_fixups(r); |
| headers_in_array = apr_table_elts(r->headers_in); |
| headers_in = (const apr_table_entry_t *) headers_in_array->elts; |
| for (counter = 0; counter < headers_in_array->nelts; counter++) { |
| if (headers_in[counter].key == NULL || headers_in[counter].val == NULL |
| |
| /* Clear out hop-by-hop request headers not to send |
| * RFC2616 13.5.1 says we should strip these headers |
| */ |
| /* Already sent */ |
| || !apr_strnatcasecmp(headers_in[counter].key, "Host") |
| |
| || !apr_strnatcasecmp(headers_in[counter].key, "Keep-Alive") |
| || !apr_strnatcasecmp(headers_in[counter].key, "TE") |
| || !apr_strnatcasecmp(headers_in[counter].key, "Trailer") |
| || !apr_strnatcasecmp(headers_in[counter].key, "Transfer-Encoding") |
| || !apr_strnatcasecmp(headers_in[counter].key, "Upgrade") |
| |
| /* We have no way of knowing whether this Content-Length will |
| * be accurate, so we must not include it. |
| */ |
| || !apr_strnatcasecmp(headers_in[counter].key, "Content-Length") |
| /* XXX: @@@ FIXME: "Proxy-Authorization" should *only* be |
| * suppressed if THIS server requested the authentication, |
| * not when a frontend proxy requested it! |
| * |
| * The solution to this problem is probably to strip out |
| * the Proxy-Authorisation header in the authorisation |
| * code itself, not here. This saves us having to signal |
| * somehow whether this request was authenticated or not. |
| */ |
| || !apr_strnatcasecmp(headers_in[counter].key,"Proxy-Authorization") |
| || !apr_strnatcasecmp(headers_in[counter].key,"Proxy-Authenticate")) { |
| continue; |
| } |
| /* for sub-requests, ignore freshness/expiry headers */ |
| if (r->main) { |
| if (headers_in[counter].key == NULL || headers_in[counter].val == NULL |
| || !apr_strnatcasecmp(headers_in[counter].key, "If-Match") |
| || !apr_strnatcasecmp(headers_in[counter].key, "If-Modified-Since") |
| || !apr_strnatcasecmp(headers_in[counter].key, "If-Range") |
| || !apr_strnatcasecmp(headers_in[counter].key, "If-Unmodified-Since") |
| || !apr_strnatcasecmp(headers_in[counter].key, "If-None-Match")) { |
| continue; |
| } |
| } |
| |
| |
| buf = apr_pstrcat(p, headers_in[counter].key, ": ", |
| headers_in[counter].val, CRLF, |
| NULL); |
| ap_xlate_proto_to_ascii(buf, strlen(buf)); |
| e = apr_bucket_pool_create(buf, strlen(buf), p, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(header_brigade, e); |
| } |
| |
| /* If we can send chunks, do so! */ |
| if (send_chunks) { |
| const char *te_hdr = "Transfer-Encoding: chunked" CRLF; |
| |
| buf = apr_pmemdup(p, te_hdr, sizeof(te_hdr)-1); |
| ap_xlate_proto_to_ascii(buf, sizeof(te_hdr)-1); |
| |
| e = apr_bucket_pool_create(buf, strlen(buf), p, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(header_brigade, e); |
| } |
| else { |
| last_header_bucket = APR_BRIGADE_LAST(header_brigade); |
| } |
| |
| /* add empty line at the end of the headers */ |
| #if APR_CHARSET_EBCDIC |
| e = apr_bucket_immortal_create("\015\012", 2, c->bucket_alloc); |
| #else |
| e = apr_bucket_immortal_create(CRLF, sizeof(CRLF)-1, c->bucket_alloc); |
| #endif |
| APR_BRIGADE_INSERT_TAIL(header_brigade, e); |
| e = apr_bucket_flush_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(header_brigade, e); |
| |
| if (send_chunks) { |
| status = ap_pass_brigade(origin->output_filters, header_brigade); |
| |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server, |
| "proxy: request failed to %pI (%s)", |
| conn->worker->cp->addr, conn->hostname); |
| return status; |
| } |
| } |
| |
| /* send the request data, if any. */ |
| seen_eos = 0; |
| do { |
| char chunk_hdr[20]; /* must be here due to transient bucket. */ |
| |
| status = ap_get_brigade(r->input_filters, input_brigade, |
| AP_MODE_READBYTES, APR_BLOCK_READ, |
| HUGE_STRING_LEN); |
| |
| if (status != APR_SUCCESS) { |
| return status; |
| } |
| |
| /* If this brigade contain EOS, either stop or remove it. */ |
| if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(input_brigade))) { |
| seen_eos = 1; |
| |
| /* As a shortcut, if this brigade is simply an EOS bucket, |
| * don't send anything down the filter chain. |
| */ |
| if (APR_BUCKET_IS_EOS(APR_BRIGADE_FIRST(input_brigade))) { |
| break; |
| } |
| |
| /* We can't pass this EOS to the output_filters. */ |
| e = APR_BRIGADE_LAST(input_brigade); |
| apr_bucket_delete(e); |
| } |
| |
| if (send_chunks) { |
| #define ASCII_CRLF "\015\012" |
| #define ASCII_ZERO "\060" |
| apr_size_t hdr_len; |
| apr_off_t bytes; |
| |
| apr_brigade_length(input_brigade, 1, &bytes); |
| |
| hdr_len = apr_snprintf(chunk_hdr, sizeof(chunk_hdr), |
| "%" APR_UINT64_T_HEX_FMT CRLF, |
| (apr_uint64_t)bytes); |
| |
| ap_xlate_proto_to_ascii(chunk_hdr, hdr_len); |
| e = apr_bucket_transient_create(chunk_hdr, hdr_len, |
| body_brigade->bucket_alloc); |
| APR_BRIGADE_INSERT_HEAD(input_brigade, e); |
| |
| /* |
| * Append the end-of-chunk CRLF |
| */ |
| e = apr_bucket_immortal_create(ASCII_CRLF, 2, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(input_brigade, e); |
| } |
| |
| e = apr_bucket_flush_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(input_brigade, e); |
| |
| APR_BRIGADE_CONCAT(body_brigade, input_brigade); |
| |
| if (send_chunks) { |
| status = ap_pass_brigade(origin->output_filters, body_brigade); |
| |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server, |
| "proxy: pass request data failed to %pI (%s)", |
| conn->worker->cp->addr, conn->hostname); |
| return status; |
| } |
| |
| apr_brigade_cleanup(body_brigade); |
| } |
| |
| } while (!seen_eos); |
| |
| if (send_chunks) { |
| e = apr_bucket_immortal_create(ASCII_ZERO ASCII_CRLF |
| /* <trailers> */ |
| ASCII_CRLF, 5, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(body_brigade, e); |
| } |
| |
| if (!send_chunks) { |
| apr_off_t bytes; |
| |
| apr_brigade_length(body_brigade, 1, &bytes); |
| |
| if (bytes) { |
| const char *cl_hdr = "Content-Length", *cl_val; |
| cl_val = apr_off_t_toa(c->pool, bytes); |
| buf = apr_pstrcat(p, cl_hdr, ": ", cl_val, CRLF, NULL); |
| ap_xlate_proto_to_ascii(buf, strlen(buf)); |
| e = apr_bucket_pool_create(buf, strlen(buf), p, c->bucket_alloc); |
| APR_BUCKET_INSERT_AFTER(last_header_bucket, e); |
| } |
| status = ap_pass_brigade(origin->output_filters, header_brigade); |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server, |
| "proxy: pass request data failed to %pI (%s)", |
| conn->worker->cp->addr, conn->hostname); |
| return status; |
| } |
| |
| apr_brigade_cleanup(header_brigade); |
| } |
| |
| status = ap_pass_brigade(origin->output_filters, body_brigade); |
| |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server, |
| "proxy: pass request data failed to %pI (%s)", |
| conn->worker->cp->addr, conn->hostname); |
| return status; |
| } |
| |
| apr_brigade_cleanup(body_brigade); |
| |
| return APR_SUCCESS; |
| } |
| static void process_proxy_header(request_rec* r, proxy_server_conf* c, |
| const char* key, const char* value) |
| { |
| static const char* date_hdrs[] |
| = { "Date", "Expires", "Last-Modified", NULL } ; |
| static const struct { |
| const char* name ; |
| const char* (*func)(request_rec*, proxy_server_conf*, const char*) ; |
| } transform_hdrs[] = { |
| { "Location", ap_proxy_location_reverse_map } , |
| { "Content-Location", ap_proxy_location_reverse_map } , |
| { "URI", ap_proxy_location_reverse_map } , |
| { "Set-Cookie", proxy_cookie_reverse_map } , |
| { NULL, NULL } |
| } ; |
| int i ; |
| for ( i = 0 ; date_hdrs[i] ; ++i ) { |
| if ( !strcasecmp(date_hdrs[i], key) ) { |
| apr_table_add(r->headers_out, key, |
| ap_proxy_date_canon(r->pool, value)) ; |
| return ; |
| } |
| } |
| for ( i = 0 ; transform_hdrs[i].name ; ++i ) { |
| if ( !strcasecmp(transform_hdrs[i].name, key) ) { |
| apr_table_add(r->headers_out, key, |
| (*transform_hdrs[i].func)(r, c, value)) ; |
| return ; |
| } |
| } |
| apr_table_add(r->headers_out, key, value) ; |
| return ; |
| } |
| |
| static void ap_proxy_read_headers(request_rec *r, request_rec *rr, char *buffer, int size, conn_rec *c) |
| { |
| int len; |
| char *value, *end; |
| char field[MAX_STRING_LEN]; |
| int saw_headers = 0; |
| void *sconf = r->server->module_config; |
| proxy_server_conf *psc; |
| |
| psc = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); |
| |
| r->headers_out = apr_table_make(r->pool, 20); |
| |
| /* |
| * Read header lines until we get the empty separator line, a read error, |
| * the connection closes (EOF), or we timeout. |
| */ |
| while ((len = ap_getline(buffer, size, rr, 1)) > 0) { |
| |
| if (!(value = strchr(buffer, ':'))) { /* Find the colon separator */ |
| |
| /* We may encounter invalid headers, usually from buggy |
| * MS IIS servers, so we need to determine just how to handle |
| * them. We can either ignore them, assume that they mark the |
| * start-of-body (eg: a missing CRLF) or (the default) mark |
| * the headers as totally bogus and return a 500. The sole |
| * exception is an extra "HTTP/1.0 200, OK" line sprinkled |
| * in between the usual MIME headers, which is a favorite |
| * IIS bug. |
| */ |
| /* XXX: The mask check is buggy if we ever see an HTTP/1.10 */ |
| |
| if (!apr_date_checkmask(buffer, "HTTP/#.# ###*")) { |
| if (psc->badopt == bad_error) { |
| /* Nope, it wasn't even an extra HTTP header. Give up. */ |
| return ; |
| } |
| else if (psc->badopt == bad_body) { |
| /* if we've already started loading headers_out, then |
| * return what we've accumulated so far, in the hopes |
| * that they are useful. Otherwise, we completely bail. |
| */ |
| /* FIXME: We've already scarfed the supposed 1st line of |
| * the body, so the actual content may end up being bogus |
| * as well. If the content is HTML, we may be lucky. |
| */ |
| if (saw_headers) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server, |
| "proxy: Starting body due to bogus non-header in headers " |
| "returned by %s (%s)", r->uri, r->method); |
| return ; |
| } else { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server, |
| "proxy: No HTTP headers " |
| "returned by %s (%s)", r->uri, r->method); |
| return ; |
| } |
| } |
| } |
| /* this is the psc->badopt == bad_ignore case */ |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server, |
| "proxy: Ignoring bogus HTTP header " |
| "returned by %s (%s)", r->uri, r->method); |
| continue; |
| } |
| |
| *value = '\0'; |
| ++value; |
| /* XXX: RFC2068 defines only SP and HT as whitespace, this test is |
| * wrong... and so are many others probably. |
| */ |
| while (apr_isspace(*value)) |
| ++value; /* Skip to start of value */ |
| |
| /* should strip trailing whitespace as well */ |
| for (end = &value[strlen(value)-1]; end > value && apr_isspace(*end); -- |
| end) |
| *end = '\0'; |
| |
| /* make sure we add so as not to destroy duplicated headers |
| * Modify headers requiring canonicalisation and/or affected |
| * by ProxyPassReverse and family with process_proxy_header |
| */ |
| process_proxy_header(r, psc, buffer, value) ; |
| saw_headers = 1; |
| |
| /* the header was too long; at the least we should skip extra data */ |
| if (len >= size - 1) { |
| while ((len = ap_getline(field, MAX_STRING_LEN, rr, 1)) |
| >= MAX_STRING_LEN - 1) { |
| /* soak up the extra data */ |
| } |
| if (len == 0) /* time to exit the larger loop as well */ |
| break; |
| } |
| } |
| } |
| |
| |
| |
| static int addit_dammit(void *v, const char *key, const char *val) |
| { |
| apr_table_addn(v, key, val); |
| return 1; |
| } |
| |
| static |
| apr_status_t ap_proxy_http_process_response(apr_pool_t * p, request_rec *r, |
| proxy_conn_rec *backend, |
| conn_rec *origin, |
| proxy_server_conf *conf, |
| char *server_portstr) { |
| conn_rec *c = r->connection; |
| char buffer[HUGE_STRING_LEN]; |
| char keepchar; |
| request_rec *rp; |
| apr_bucket *e; |
| apr_bucket_brigade *bb; |
| int len, backasswards; |
| int interim_response; /* non-zero whilst interim 1xx responses |
| * are being read. */ |
| apr_table_t *save_table; |
| |
| bb = apr_brigade_create(p, c->bucket_alloc); |
| |
| /* Get response from the remote server, and pass it up the |
| * filter chain |
| */ |
| |
| rp = ap_proxy_make_fake_req(origin, r); |
| /* In case anyone needs to know, this is a fake request that is really a |
| * response. |
| */ |
| rp->proxyreq = PROXYREQ_RESPONSE; |
| |
| do { |
| apr_brigade_cleanup(bb); |
| |
| len = ap_getline(buffer, sizeof(buffer), rp, 0); |
| if (len == 0) { |
| /* handle one potential stray CRLF */ |
| len = ap_getline(buffer, sizeof(buffer), rp, 0); |
| } |
| if (len <= 0) { |
| ap_proxy_http_cleanup(NULL, r, backend); |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, |
| "proxy: error reading status line from remote " |
| "server %s", backend->hostname); |
| return ap_proxyerror(r, HTTP_BAD_GATEWAY, |
| "Error reading from remote server"); |
| } |
| |
| /* Is it an HTTP/1 response? |
| * This is buggy if we ever see an HTTP/1.10 |
| */ |
| if (apr_date_checkmask(buffer, "HTTP/#.# ###*")) { |
| int major, minor; |
| |
| if (2 != sscanf(buffer, "HTTP/%u.%u", &major, &minor)) { |
| major = 1; |
| minor = 1; |
| } |
| /* If not an HTTP/1 message or |
| * if the status line was > 8192 bytes |
| */ |
| else if ((buffer[5] != '1') || (len >= sizeof(buffer)-1)) { |
| ap_proxy_http_cleanup(NULL, r, backend); |
| return ap_proxyerror(r, HTTP_BAD_GATEWAY, |
| apr_pstrcat(p, "Corrupt status line returned by remote " |
| "server: ", buffer, NULL)); |
| } |
| backasswards = 0; |
| |
| keepchar = buffer[12]; |
| buffer[12] = '\0'; |
| r->status = atoi(&buffer[9]); |
| |
| if (keepchar != '\0') { |
| buffer[12] = keepchar; |
| } else { |
| /* 2616 requires the space in Status-Line; the origin |
| * server may have sent one but ap_rgetline_core will |
| * have stripped it. */ |
| buffer[12] = ' '; |
| buffer[13] = '\0'; |
| } |
| r->status_line = apr_pstrdup(p, &buffer[9]); |
| |
| |
| /* read the headers. */ |
| /* N.B. for HTTP/1.0 clients, we have to fold line-wrapped headers*/ |
| /* Also, take care with headers with multiple occurences. */ |
| |
| /* First, tuck away all already existing cookies */ |
| save_table = apr_table_make(r->pool, 2); |
| apr_table_do(addit_dammit, save_table, r->headers_out, |
| "Set-Cookie", NULL); |
| |
| /* shove the headers direct into r->headers_out */ |
| ap_proxy_read_headers(r, rp, buffer, sizeof(buffer), origin); |
| |
| if (r->headers_out == NULL) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, |
| r->server, "proxy: bad HTTP/%d.%d header " |
| "returned by %s (%s)", major, minor, r->uri, |
| r->method); |
| backend->close += 1; |
| /* |
| * ap_send_error relies on a headers_out to be present. we |
| * are in a bad position here.. so force everything we send out |
| * to have nothing to do with the incoming packet |
| */ |
| r->headers_out = apr_table_make(r->pool,1); |
| r->status = HTTP_BAD_GATEWAY; |
| r->status_line = "bad gateway"; |
| return r->status; |
| |
| } else { |
| const char *buf; |
| |
| /* Now, add in the just read cookies */ |
| apr_table_do(addit_dammit, save_table, r->headers_out, |
| "Set-Cookie", NULL); |
| |
| /* and now load 'em all in */ |
| if (!apr_is_empty_table(save_table)) { |
| apr_table_unset(r->headers_out, "Set-Cookie"); |
| r->headers_out = apr_table_overlay(r->pool, |
| r->headers_out, |
| save_table); |
| } |
| |
| /* strip connection listed hop-by-hop headers from response */ |
| backend->close += ap_proxy_liststr(apr_table_get(r->headers_out, |
| "Connection"), |
| "close"); |
| ap_proxy_clear_connection(p, r->headers_out); |
| if ((buf = apr_table_get(r->headers_out, "Content-Type"))) { |
| ap_set_content_type(r, apr_pstrdup(p, buf)); |
| } |
| ap_proxy_pre_http_request(origin,rp); |
| } |
| |
| /* handle Via header in response */ |
| if (conf->viaopt != via_off && conf->viaopt != via_block) { |
| const char *server_name = ap_get_server_name(r); |
| /* If USE_CANONICAL_NAME_OFF was configured for the proxy virtual host, |
| * then the server name returned by ap_get_server_name() is the |
| * origin server name (which does make too much sense with Via: headers) |
| * so we use the proxy vhost's name instead. |
| */ |
| if (server_name == r->hostname) |
| server_name = r->server->server_hostname; |
| /* create a "Via:" response header entry and merge it */ |
| apr_table_mergen(r->headers_out, "Via", |
| (conf->viaopt == via_full) |
| ? apr_psprintf(p, "%d.%d %s%s (%s)", |
| HTTP_VERSION_MAJOR(r->proto_num), |
| HTTP_VERSION_MINOR(r->proto_num), |
| server_name, |
| server_portstr, |
| AP_SERVER_BASEVERSION) |
| : apr_psprintf(p, "%d.%d %s%s", |
| HTTP_VERSION_MAJOR(r->proto_num), |
| HTTP_VERSION_MINOR(r->proto_num), |
| server_name, |
| server_portstr) |
| ); |
| } |
| |
| /* cancel keepalive if HTTP/1.0 or less */ |
| if ((major < 1) || (minor < 1)) { |
| backend->close += 1; |
| origin->keepalive = AP_CONN_CLOSE; |
| } |
| } else { |
| /* an http/0.9 response */ |
| backasswards = 1; |
| r->status = 200; |
| r->status_line = "200 OK"; |
| backend->close += 1; |
| } |
| |
| interim_response = ap_is_HTTP_INFO(r->status); |
| if (interim_response) { |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, |
| "proxy: HTTP: received interim %d response", |
| r->status); |
| } |
| /* Moved the fixups of Date headers and those affected by |
| * ProxyPassReverse/etc from here to ap_proxy_read_headers |
| */ |
| |
| if ((r->status == 401) && (conf->error_override != 0)) { |
| const char *buf; |
| const char *wa = "WWW-Authenticate"; |
| if ((buf = apr_table_get(r->headers_out, wa))) { |
| apr_table_set(r->err_headers_out, wa, buf); |
| } else { |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: origin server sent 401 without WWW-Authenticate header"); |
| } |
| } |
| |
| r->sent_bodyct = 1; |
| /* Is it an HTTP/0.9 response? If so, send the extra data */ |
| if (backasswards) { |
| apr_ssize_t cntr = len; |
| /*@@@FIXME: |
| * At this point in response processing of a 0.9 response, |
| * we don't know yet whether data is binary or not. |
| * mod_charset_lite will get control later on, so it cannot |
| * decide on the conversion of this buffer full of data. |
| * However, chances are that we are not really talking to an |
| * HTTP/0.9 server, but to some different protocol, therefore |
| * the best guess IMHO is to always treat the buffer as "text/x": |
| */ |
| ap_xlate_proto_to_ascii(buffer, len); |
| e = apr_bucket_heap_create(buffer, cntr, NULL, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, e); |
| } |
| |
| /* send body - but only if a body is expected */ |
| if ((!r->header_only) && /* not HEAD request */ |
| !interim_response && /* not any 1xx response */ |
| (r->status != HTTP_NO_CONTENT) && /* not 204 */ |
| (r->status != HTTP_RESET_CONTENT) && /* not 205 */ |
| (r->status != HTTP_NOT_MODIFIED)) { /* not 304 */ |
| |
| /* We need to copy the output headers and treat them as input |
| * headers as well. BUT, we need to do this before we remove |
| * TE, so that they are preserved accordingly for |
| * ap_http_filter to know where to end. |
| */ |
| rp->headers_in = apr_table_copy(r->pool, r->headers_out); |
| |
| apr_table_unset(r->headers_out,"Transfer-Encoding"); |
| |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: start body send"); |
| |
| /* |
| * if we are overriding the errors, we can't put the content |
| * of the page into the brigade |
| */ |
| if (conf->error_override == 0 || ap_is_HTTP_SUCCESS(r->status)) { |
| |
| /* read the body, pass it to the output filters */ |
| int finish = FALSE; |
| while (ap_get_brigade(rp->input_filters, |
| bb, |
| AP_MODE_READBYTES, |
| APR_BLOCK_READ, |
| conf->io_buffer_size) == APR_SUCCESS) { |
| #if DEBUGGING |
| { |
| apr_off_t readbytes; |
| apr_brigade_length(bb, 0, &readbytes); |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, |
| r->server, "proxy (PID %d): readbytes: %#x", |
| getpid(), readbytes); |
| } |
| #endif |
| /* sanity check */ |
| if (APR_BRIGADE_EMPTY(bb)) { |
| apr_brigade_cleanup(bb); |
| break; |
| } |
| |
| /* found the last brigade? */ |
| if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(bb))) { |
| /* if this is the last brigade, cleanup the |
| * backend connection first to prevent the |
| * backend server from hanging around waiting |
| * for a slow client to eat these bytes |
| */ |
| backend->close = 1; |
| /* signal that we must leave */ |
| finish = TRUE; |
| } |
| |
| /* try send what we read */ |
| if (ap_pass_brigade(r->output_filters, bb) != APR_SUCCESS) { |
| /* Ack! Phbtt! Die! User aborted! */ |
| backend->close = 1; /* this causes socket close below */ |
| finish = TRUE; |
| } |
| |
| /* make sure we always clean up after ourselves */ |
| apr_brigade_cleanup(bb); |
| |
| /* if we are done, leave */ |
| if (TRUE == finish) { |
| break; |
| } |
| } |
| } |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: end body send"); |
| } else { |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: header only"); |
| } |
| } while (interim_response); |
| |
| if (conf->error_override) { |
| /* the code above this checks for 'OK' which is what the hook expects */ |
| if (ap_is_HTTP_SUCCESS(r->status)) |
| return OK; |
| else { |
| /* clear r->status for override error, otherwise ErrorDocument |
| * thinks that this is a recursive error, and doesn't find the |
| * custom error page |
| */ |
| int status = r->status; |
| r->status = HTTP_OK; |
| /* Discard body, if one is expected */ |
| if ((status != HTTP_NO_CONTENT) && /* not 204 */ |
| (status != HTTP_RESET_CONTENT) && /* not 205 */ |
| (status != HTTP_NOT_MODIFIED)) { /* not 304 */ |
| ap_discard_request_body(rp); |
| } |
| return status; |
| } |
| } else |
| return OK; |
| } |
| |
| static |
| apr_status_t ap_proxy_http_cleanup(const char *scheme, request_rec *r, |
| proxy_conn_rec *backend) |
| { |
| /* If there are no KeepAlives, or if the connection has been signalled |
| * to close, close the socket and clean up |
| */ |
| |
| /* if the connection is < HTTP/1.1, or Connection: close, |
| * we close the socket, otherwise we leave it open for KeepAlive support |
| */ |
| if (backend->close || (r->proto_num < HTTP_VERSION(1,1))) { |
| backend->close_on_recycle = 1; |
| ap_set_module_config(r->connection->conn_config, &proxy_http_module, NULL); |
| ap_proxy_release_connection(scheme, backend, r->server); |
| } |
| return OK; |
| } |
| |
| /* |
| * This handles http:// URLs, and other URLs using a remote proxy over http |
| * If proxyhost is NULL, then contact the server directly, otherwise |
| * go via the proxy. |
| * Note that if a proxy is used, then URLs other than http: can be accessed, |
| * also, if we have trouble which is clearly specific to the proxy, then |
| * we return DECLINED so that we can try another proxy. (Or the direct |
| * route.) |
| */ |
| int ap_proxy_http_handler(request_rec *r, proxy_worker *worker, |
| proxy_server_conf *conf, |
| char *url, const char *proxyname, |
| apr_port_t proxyport) |
| { |
| int status; |
| char server_portstr[32]; |
| char *scheme; |
| const char *proxy_function; |
| const char *u; |
| proxy_conn_rec *backend = NULL; |
| int is_ssl = 0; |
| |
| /* Note: Memory pool allocation. |
| * A downstream keepalive connection is always connected to the existence |
| * (or not) of an upstream keepalive connection. If this is not done then |
| * load balancing against multiple backend servers breaks (one backend |
| * server ends up taking 100% of the load), and the risk is run of |
| * downstream keepalive connections being kept open unnecessarily. This |
| * keeps webservers busy and ties up resources. |
| * |
| * As a result, we allocate all sockets out of the upstream connection |
| * pool, and when we want to reuse a socket, we check first whether the |
| * connection ID of the current upstream connection is the same as that |
| * of the connection when the socket was opened. |
| */ |
| apr_pool_t *p = r->connection->pool; |
| conn_rec *c = r->connection; |
| apr_uri_t *uri = apr_palloc(r->connection->pool, sizeof(*uri)); |
| |
| /* find the scheme */ |
| u = strchr(url, ':'); |
| if (u == NULL || u[1] != '/' || u[2] != '/' || u[3] == '\0') |
| return DECLINED; |
| if ((u - url) > 14) |
| return HTTP_BAD_REQUEST; |
| scheme = apr_pstrndup(c->pool, url, u - url); |
| /* scheme is lowercase */ |
| apr_tolower(scheme); |
| /* is it for us? */ |
| if (strcmp(scheme, "https") == 0) { |
| if (!ap_proxy_ssl_enable(NULL)) { |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: HTTPS: declining URL %s" |
| " (mod_ssl not configured?)", url); |
| return DECLINED; |
| } |
| is_ssl = 1; |
| proxy_function = "HTTPS"; |
| } |
| else if (!(strcmp(scheme, "http") == 0 || (strcmp(scheme, "ftp") == 0 && proxyname))) { |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: HTTP: declining URL %s", url); |
| return DECLINED; /* only interested in HTTP, or FTP via proxy */ |
| } |
| else { |
| if (*scheme == 'h') |
| proxy_function = "HTTP"; |
| else |
| proxy_function = "FTP"; |
| } |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: HTTP: serving URL %s", url); |
| |
| |
| /* only use stored info for top-level pages. Sub requests don't share |
| * in keepalives |
| */ |
| if (!r->main) { |
| backend = (proxy_conn_rec *) ap_get_module_config(c->conn_config, |
| &proxy_http_module); |
| } |
| /* create space for state information */ |
| if (!backend) { |
| status = ap_proxy_acquire_connection(proxy_function, &backend, worker, r->server); |
| if (status != OK) { |
| if (backend) { |
| backend->close_on_recycle = 1; |
| ap_proxy_release_connection(proxy_function, backend, r->server); |
| } |
| return status; |
| } |
| if (!r->main) { |
| ap_set_module_config(c->conn_config, &proxy_http_module, backend); |
| } |
| } |
| |
| backend->is_ssl = is_ssl; |
| backend->close_on_recycle = 1; |
| |
| /* Step One: Determine Who To Connect To */ |
| status = ap_proxy_determine_connection(p, r, conf, worker, backend, c->pool, |
| uri, &url, proxyname, proxyport, |
| server_portstr, |
| sizeof(server_portstr)); |
| |
| if ( status != OK ) { |
| return status; |
| } |
| |
| /* Step Two: Make the Connection */ |
| if (ap_proxy_connect_backend(proxy_function, backend, worker, r->server)) { |
| return HTTP_SERVICE_UNAVAILABLE; |
| } |
| |
| /* Step Three: Create conn_rec */ |
| if (!backend->connection) { |
| status = ap_proxy_connection_create(proxy_function, backend, c, r->server); |
| if (status != OK) |
| return status; |
| } |
| |
| /* Step Four: Send the Request */ |
| status = ap_proxy_http_request(p, r, backend, backend->connection, conf, uri, url, |
| server_portstr); |
| if ( status != OK ) { |
| return status; |
| } |
| |
| /* Step Five: Receive the Response */ |
| status = ap_proxy_http_process_response(p, r, backend, backend->connection, conf, |
| server_portstr); |
| if (status != OK) { |
| /* clean up even if there is an error */ |
| ap_proxy_http_cleanup(proxy_function, r, backend); |
| return status; |
| } |
| |
| /* Step Six: Clean Up */ |
| status = ap_proxy_http_cleanup(proxy_function, r, backend); |
| if ( status != OK ) { |
| return status; |
| } |
| |
| return OK; |
| } |
| |
| static void ap_proxy_http_register_hook(apr_pool_t *p) |
| { |
| proxy_hook_scheme_handler(ap_proxy_http_handler, NULL, NULL, APR_HOOK_FIRST); |
| proxy_hook_canon_handler(ap_proxy_http_canon, NULL, NULL, APR_HOOK_FIRST); |
| } |
| |
| module AP_MODULE_DECLARE_DATA proxy_http_module = { |
| STANDARD20_MODULE_STUFF, |
| NULL, /* create per-directory config structure */ |
| NULL, /* merge per-directory config structures */ |
| NULL, /* create per-server config structure */ |
| NULL, /* merge per-server config structures */ |
| NULL, /* command apr_table_t */ |
| ap_proxy_http_register_hook/* register hooks */ |
| }; |
| |
