diff options
Diffstat (limited to 'modules/proxy/proxy_http.c')
| -rw-r--r-- | modules/proxy/proxy_http.c | 835 |
1 files changed, 0 insertions, 835 deletions
diff --git a/modules/proxy/proxy_http.c b/modules/proxy/proxy_http.c deleted file mode 100644 index f6d3213a28..0000000000 --- a/modules/proxy/proxy_http.c +++ /dev/null @@ -1,835 +0,0 @@ -/* ==================================================================== - * The Apache Software License, Version 1.1 - * - * Copyright (c) 2000-2001 The Apache Software Foundation. All rights - * reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. The end-user documentation included with the redistribution, - * if any, must include the following acknowledgment: - * "This product includes software developed by the - * Apache Software Foundation (http://www.apache.org/)." - * Alternately, this acknowledgment may appear in the software itself, - * if and wherever such third-party acknowledgments normally appear. - * - * 4. The names "Apache" and "Apache Software Foundation" must - * not be used to endorse or promote products derived from this - * software without prior written permission. For written - * permission, please contact apache@apache.org. - * - * 5. Products derived from this software may not be called "Apache", - * nor may "Apache" appear in their name, without prior written - * permission of the Apache Software Foundation. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * ==================================================================== - * - * This software consists of voluntary contributions made by many - * individuals on behalf of the Apache Software Foundation. For more - * information on the Apache Software Foundation, please see - * <http://www.apache.org/>. - * - * Portions of this software are based upon public domain software - * originally written at the National Center for Supercomputing Applications, - * University of Illinois, Urbana-Champaign. - */ - -/* HTTP routines for Apache proxy */ - -#include "mod_proxy.h" - -module AP_MODULE_DECLARE_DATA proxy_http_module; - -PROXY_DECLARE (int) ap_proxy_http_canon(request_rec *r, char *url); -PROXY_DECLARE (int) ap_proxy_http_handler(request_rec *r, proxy_server_conf *conf, - char *url, const char *proxyname, - apr_port_t proxyport); - - -/* - * 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. - */ -PROXY_DECLARE (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_default_port_for_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 = ap_default_port_for_scheme(scheme); - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 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) - 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'; - - 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 && strncmp(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; -} - -/* 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"); -} - -/* - * 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.) - */ -PROXY_DECLARE (int) ap_proxy_http_handler(request_rec *r, proxy_server_conf *conf, - char *url, const char *proxyname, - apr_port_t proxyport) -{ - request_rec *rp; - const char *connectname; - int connectport = 0; - apr_sockaddr_t *uri_addr; - apr_sockaddr_t *connect_addr; - char server_portstr[32]; - apr_socket_t *sock; - int i, len, backasswards, eos, close=0, failed=0, new=0; - apr_status_t err, rv; - apr_array_header_t *headers_in_array; - apr_table_entry_t *headers_in; - char buffer[HUGE_STRING_LEN]; - char *buf; - conn_rec *origin; - uri_components uri; - proxy_conn_rec *backend; - - /* 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_bucket *e; - apr_bucket_brigade *bb = apr_brigade_create(p); - - /* is it for us? */ - if (strncasecmp(url, "http:", 5)) { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: HTTP: rejecting URL %s", url); - return DECLINED; /* only interested in HTTP */ - } - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: HTTP: serving URL %s", url); - - /* create space for state information */ - backend = (proxy_conn_rec *) ap_get_module_config(c->conn_config, &proxy_http_module); - if (!backend) { - backend = ap_pcalloc(c->pool, sizeof(proxy_conn_rec)); - backend->connection = NULL; - backend->hostname = NULL; - backend->port = 0; - ap_set_module_config(c->conn_config, &proxy_http_module, backend); - } - - /* - * Step One: Determine Who To Connect To - * - * Break up the URL to determine the host to connect to - */ - - /* we break the URL into host, port, uri */ - if (HTTP_OK != ap_parse_uri_components(p, url, &uri)) { - return ap_proxyerror(r, HTTP_BAD_REQUEST, - apr_pstrcat(p,"URI cannot be parsed: ", url, NULL)); - } - if (!uri.port) { - uri.port = ap_default_port_for_scheme(uri.scheme); - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: HTTP connecting %s to %s:%d", url, uri.hostname, uri.port); - - /* do a DNS lookup for the destination host */ - /* see memory note above */ - err = apr_sockaddr_info_get(&uri_addr, apr_pstrdup(c->pool, uri.hostname), APR_UNSPEC, uri.port, 0, c->pool); - - /* allocate these out of the connection pool - the check on r->connection->id makes - * sure that this string does not get accessed past the connection lifetime */ - /* are we connecting directly, or via a proxy? */ - if (proxyname) { - connectname = apr_pstrdup(c->pool,proxyname); - connectport = proxyport; - /* see memory note above */ - err = apr_sockaddr_info_get(&connect_addr, connectname, APR_UNSPEC, connectport, 0, c->pool); - } - else { - connectname = apr_pstrdup(c->pool, uri.hostname); - connectport = uri.port; - connect_addr = uri_addr; - url = apr_pstrcat(p, uri.path, uri.query ? "?" : "", - uri.query ? uri.query : "", uri.fragment ? "#" : "", - uri.fragment ? uri.fragment : "", NULL); - } - - - /* Get the server port for the Via headers */ - { - i = ap_get_server_port(r); - if (ap_is_default_port(i,r)) { - strcpy(server_portstr,""); - } else { - apr_snprintf(server_portstr, sizeof server_portstr, ":%d", i); - } - } - - /* check if ProxyBlock directive on this host */ - if (OK != ap_proxy_checkproxyblock(r, conf, uri_addr)) { - return ap_proxyerror(r, HTTP_FORBIDDEN, - "Connect to remote machine blocked"); - } - - - /* - * Step Two: Make the Connection - * - * We have determined who to connect to. Now make the connection, supporting - * a KeepAlive connection. - */ - - /* get all the possible IP addresses for the destname and loop through them - * until we get a successful connection - */ - if (APR_SUCCESS != err) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_pstrcat(p, - "DNS lookup failure for: ", - connectname, NULL)); - } - - /* if a keepalive socket is already open, check whether it must stay - * open, or whether it should be closed and a new socket created. - */ - /* see memory note above */ - if (backend->connection) { - if ((backend->connection->id == c->id) && - (backend->port == connectport) && - (backend->hostname) && - (!apr_strnatcasecmp(backend->hostname,connectname))) { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: keepalive address match (keep original socket)"); - } - else { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: keepalive address mismatch / connection has" - " changed (close old socket (%s/%s, %d/%d))", - connectname, backend->hostname, - connectport, backend->port); - apr_socket_close(backend->connection->client_socket); - backend->connection = NULL; - } - } - - /* get a socket - either a keepalive one, or a new one */ - new = 1; - if ((backend->connection) && (backend->connection->id == c->id)) { - - /* use previous keepalive socket */ - origin = backend->connection; - sock = origin->client_socket; - new = 0; - - /* reset the connection filters */ - ap_proxy_reset_output_filters(origin); - - /* XXX FIXME: If the socket has since closed, change new to 1 so - * a new socket is opened */ - } - if (new) { - - /* create a new socket */ - backend->connection = NULL; - - /* see memory note above */ - if ((rv = apr_socket_create(&sock, APR_INET, SOCK_STREAM, c->pool)) != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server, - "proxy: error creating socket"); - return HTTP_INTERNAL_SERVER_ERROR; - } - -#if !defined(TPF) && !defined(BEOS) - if (conf->recv_buffer_size > 0 && (rv = apr_setsocketopt(sock, APR_SO_RCVBUF, - conf->recv_buffer_size))) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default"); - } -#endif - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: socket has been created"); - - /* - * At this point we have a list of one or more IP addresses of - * the machine to connect to. If configured, reorder this - * list so that the "best candidate" is first try. "best - * candidate" could mean the least loaded server, the fastest - * responding server, whatever. - * - * For now we do nothing, ie we get DNS round robin. - * XXX FIXME - */ - - - /* try each IP address until we connect successfully */ - failed = 1; - while (connect_addr) { - - /* make the connection out of the socket */ - rv = apr_connect(sock, connect_addr); - - /* if an error occurred, loop round and try again */ - if (rv != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server, - "proxy: attempt to connect to %pI (%s) failed", - connect_addr, connectname); - connect_addr = connect_addr->next; - continue; - } - - /* if we get here, all is well */ - failed = 0; - break; - } - - /* handle a permanent error from the above loop */ - if (failed) { - apr_socket_close(sock); - if (proxyname) { - return DECLINED; - } - else { - return HTTP_BAD_GATEWAY; - } - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: socket is connected"); - - /* the socket is now open, create a new backend server connection */ - origin = ap_new_connection(c->pool, r->server, sock, r->connection->id); - if (!origin) { - /* the peer reset the connection already; ap_new_connection() - * closed the socket */ - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: an error occurred creating a new connection to %pI (%s)", connect_addr, connectname); - apr_socket_close(sock); - return HTTP_INTERNAL_SERVER_ERROR; - } - backend->connection = origin; - backend->hostname = apr_pstrdup(c->pool, connectname); - backend->port = connectport; - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: connection complete"); - - /* set up the connection filters */ - ap_proxy_pre_http_connection(origin, NULL); - - } - - - /* - * Step Three: Send the Request - * - * 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. - */ - close += ap_proxy_liststr(apr_table_get(r->headers_in, "Connection"), "close"); - ap_proxy_clear_connection(p, r->headers_in); - if (close) { - apr_table_mergen(r->headers_in, "Connection", "close"); - origin->keepalive = 0; - } - - buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.1" CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - if (uri.port_str && uri.port != DEFAULT_HTTP_PORT) { - buf = apr_pstrcat(p, "Host: ", uri.hostname, ":", uri.port_str, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - } - else { - buf = apr_pstrcat(p, "Host: ", uri.hostname, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, 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) { - /* 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), - ap_get_server_name(r), server_portstr, - AP_SERVER_BASEVERSION) - : apr_psprintf(p, "%d.%d %s%s", - HTTP_VERSION_MAJOR(r->proto_num), - HTTP_VERSION_MINOR(r->proto_num), - ap_get_server_name(r), 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 */ - headers_in_array = apr_table_elts(r->headers_in); - headers_in = (apr_table_entry_t *) headers_in_array->elts; - for (i = 0; i < headers_in_array->nelts; i++) { - if (headers_in[i].key == NULL || headers_in[i].val == NULL - - /* Clear out hop-by-hop request headers not to send - * RFC2616 13.5.1 says we should strip these headers - */ - || !apr_strnatcasecmp(headers_in[i].key, "Host") /* Already sent */ - || !apr_strnatcasecmp(headers_in[i].key, "Keep-Alive") - || !apr_strnatcasecmp(headers_in[i].key, "TE") - || !apr_strnatcasecmp(headers_in[i].key, "Trailer") - || !apr_strnatcasecmp(headers_in[i].key, "Transfer-Encoding") - || !apr_strnatcasecmp(headers_in[i].key, "Upgrade") - - /* 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[i].key, "Proxy-Authorization") - || !apr_strnatcasecmp(headers_in[i].key, "Proxy-Authenticate")) - continue; - - buf = apr_pstrcat(p, headers_in[i].key, ": ", headers_in[i].val, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - - } - - /* add empty line at the end of the headers */ - e = apr_bucket_pool_create(CRLF, strlen(CRLF), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - - ap_pass_brigade(origin->output_filters, bb); - - /* send the request data, if any. */ - if (ap_should_client_block(r)) { - while ((i = ap_get_client_block(r, buffer, sizeof buffer)) > 0) { - e = apr_bucket_pool_create(buffer, i, p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - apr_brigade_cleanup(bb); - } - } - - - /* - * Step Four: Receive the Response - * - * Get response from the remote server, and pass it up the - * filter chain - */ - - rp = make_fake_req(origin, r); - - apr_brigade_cleanup(bb); - - if (APR_SUCCESS != (rv = ap_proxy_string_read(origin, bb, buffer, sizeof(buffer), &eos))) { - apr_socket_close(sock); - backend->connection = NULL; - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: error reading status line from remote server %s", - connectname); - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - len = strlen(buffer); - - /* Is it an HTTP/1 response? This is buggy if we ever see an HTTP/1.10 */ - if (ap_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)) { - apr_socket_close(sock); - backend->connection = NULL; - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - apr_pstrcat(p, "Corrupt status line returned by remote server: ", buffer, NULL)); - } - backasswards = 0; - buffer[--len] = '\0'; - - buffer[12] = '\0'; - r->status = atoi(&buffer[9]); - - buffer[12] = ' '; - 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. */ - - 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|APLOG_NOERRNO, 0, r->server, - "proxy: bad HTTP/%d.%d header returned by %s (%s)", - major, minor, r->uri, r->method); - close += 1; - } - else - { - /* strip connection listed hop-by-hop headers from response */ - const char *buf; - 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"))) { - r->content_type = apr_pstrdup(p, buf); - } - } - - /* handle Via header in response */ - if (conf->viaopt != via_off && conf->viaopt != via_block) { - /* create a "Via:" response header entry and merge it */ - ap_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), - ap_get_server_name(r), server_portstr, - AP_SERVER_BASEVERSION) - : apr_psprintf(p, "%d.%d %s%s", - HTTP_VERSION_MAJOR(r->proto_num), - HTTP_VERSION_MINOR(r->proto_num), - ap_get_server_name(r), server_portstr) - ); - } - - /* cancel keepalive if HTTP/1.0 or less */ - if ((major < 1) || (minor < 1)) { - close += 1; - origin->keepalive = 0; - } - } - else { - /* an http/0.9 response */ - backasswards = 1; - r->status = 200; - r->status_line = "200 OK"; - close += 1; - } - - /* we must accept 3 kinds of date, but generate only 1 kind of date */ - { - const char *buf; - if ((buf = apr_table_get(r->headers_out, "Date")) != NULL) { - apr_table_set(r->headers_out, "Date", ap_proxy_date_canon(p, buf)); - } - if ((buf = apr_table_get(r->headers_out, "Expires")) != NULL) { - apr_table_set(r->headers_out, "Expires", ap_proxy_date_canon(p, buf)); - } - if ((buf = apr_table_get(r->headers_out, "Last-Modified")) != NULL) { - apr_table_set(r->headers_out, "Last-Modified", ap_proxy_date_canon(p, buf)); - } - } - - /* munge the Location and URI response headers according to ProxyPassReverse */ - { - const char *buf; - if ((buf = apr_table_get(r->headers_out, "Location")) != NULL) { - apr_table_set(r->headers_out, "Location", ap_proxy_location_reverse_map(r, conf, buf)); - } - if ((buf = apr_table_get(r->headers_out, "Content-Location")) != NULL) { - apr_table_set(r->headers_out, "Content-Location", ap_proxy_location_reverse_map(r, conf, buf)); - } - if ((buf = apr_table_get(r->headers_out, "URI")) != NULL) { - apr_table_set(r->headers_out, "URI", ap_proxy_location_reverse_map(r, conf, buf)); - } - } - - r->sent_bodyct = 1; - /* Is it an HTTP/0.9 response? If so, send the extra data */ - if (backasswards) { - apr_ssize_t cntr = len; - e = apr_bucket_heap_create(buffer, cntr, 0, NULL); - APR_BRIGADE_INSERT_TAIL(bb, e); - } - - /* send body - but only if a body is expected */ - if ((!r->header_only) && /* not HEAD request */ - (r->status > 199) && /* 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 */ - - const char *buf; - apr_size_t readbytes; - - /* if chunked - insert DECHUNK filter */ - if (ap_proxy_liststr((buf = apr_table_get(r->headers_out, "Transfer-Encoding")), "chunked")) { - rp->read_chunked = 1; - apr_table_unset(r->headers_out, "Transfer-Encoding"); - if ((buf = ap_proxy_removestr(r->pool, buf, "chunked"))) { - apr_table_set(r->headers_out, "Transfer-Encoding", buf); - } - ap_add_input_filter("DECHUNK", NULL, rp, origin); - readbytes = -1; - } - - /* if content length - set the length to read */ - else if ((buf = apr_table_get(r->headers_out, "Content-Length"))) { - readbytes = atol(buf); - } - - /* no chunked / no length therefore read till EOF and cancel keepalive */ - else { - close += 1; - } - - /* if keepalive cancelled, read to EOF */ - if (close) { - readbytes = -1; - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: start body send"); - - /* read the body, pass it to the output filters */ - while (ap_get_brigade(rp->input_filters, bb, AP_MODE_BLOCKING, &readbytes) == APR_SUCCESS) { - if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(bb))) { - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(r->output_filters, bb); - break; - } - ap_pass_brigade(r->output_filters, bb); - apr_brigade_cleanup(bb); - } - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: end body send"); - } - else { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: header only"); - } - - - /* - * Step Five: Clean Up - * - * 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 (close || (r->proto_num < HTTP_VERSION(1,1))) { - apr_socket_close(sock); - backend->connection = NULL; - } - - 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 */ -}; |