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openpkg-packages/apache/apache.patch.wstunnel

842 lines
32 KiB
Raw Blame History

http://blog.cafarelli.fr/2013/04/backporting-apache-support-for-websockets-reverse-proxy-aka-getting-gateone-to-work-behind-apache/
https://cafarelli.fr/gentoo/apache-2.2.31-wstunnel.patch
https://bz.apache.org/bugzilla/show_bug.cgi?id=58503
Index: modules/proxy/config.m4
--- modules/proxy/config.m4.orig 2009-09-24 00:20:00.000000000 +0200
+++ modules/proxy/config.m4 2016-04-30 14:54:41.903080391 +0200
@@ -18,6 +18,7 @@
proxy_http_objs="mod_proxy_http.lo"
proxy_scgi_objs="mod_proxy_scgi.lo"
proxy_ajp_objs="mod_proxy_ajp.lo ajp_header.lo ajp_link.lo ajp_msg.lo ajp_utils.lo"
+proxy_wstunnel_objs="mod_proxy_wstunnel.lo"
proxy_balancer_objs="mod_proxy_balancer.lo"
case "$host" in
@@ -29,6 +30,7 @@
proxy_http_objs="$proxy_http_objs mod_proxy.la"
proxy_scgi_objs="$proxy_scgi_objs mod_proxy.la"
proxy_ajp_objs="$proxy_ajp_objs mod_proxy.la"
+ proxy_wstunnel_objs="$proxy_wstunnel_objs mod_proxy.la"
proxy_balancer_objs="$proxy_balancer_objs mod_proxy.la"
;;
esac
@@ -37,6 +39,7 @@
APACHE_MODULE(proxy_ftp, Apache proxy FTP module, $proxy_ftp_objs, , $proxy_mods_enable)
APACHE_MODULE(proxy_http, Apache proxy HTTP module, $proxy_http_objs, , $proxy_mods_enable)
APACHE_MODULE(proxy_scgi, Apache proxy SCGI module, $proxy_scgi_objs, , $proxy_mods_enable)
+APACHE_MODULE(proxy_wstunnel, Apache proxy Websocket Tunnel module, $proxy_wstunnel_objs, , $proxy_mods_enable)
APACHE_MODULE(proxy_ajp, Apache proxy AJP module, $proxy_ajp_objs, , $proxy_mods_enable)
APACHE_MODULE(proxy_balancer, Apache proxy BALANCER module, $proxy_balancer_objs, , $proxy_mods_enable)
Index: modules/proxy/mod_proxy.h
--- modules/proxy/mod_proxy.h.orig 2015-07-15 18:10:27.000000000 +0200
+++ modules/proxy/mod_proxy.h 2016-04-30 14:54:41.903080391 +0200
@@ -792,6 +792,46 @@
server_rec *server);
#endif
+/**
+ * Create a HTTP request header brigade, old_cl_val and old_te_val as required.
+ * @parama p pool
+ * @param header_brigade header brigade to use/fill
+ * @param r request
+ * @param p_conn proxy connection rec
+ * @param worker selected worker
+ * @param conf per-server proxy config
+ * @param uri uri
+ * @param url url
+ * @param server_portstr port as string
+ * @param old_cl_val stored old content-len val
+ * @param old_te_val stored old TE val
+ * @return OK or HTTP_EXPECTATION_FAILED
+ */
+PROXY_DECLARE(int) ap_proxy_create_hdrbrgd(apr_pool_t *p,
+ apr_bucket_brigade *header_brigade,
+ request_rec *r,
+ proxy_conn_rec *p_conn,
+ proxy_worker *worker,
+ proxy_server_conf *conf,
+ apr_uri_t *uri,
+ char *url, char *server_portstr,
+ char **old_cl_val,
+ char **old_te_val);
+
+/**
+ * @param bucket_alloc bucket allocator
+ * @param r request
+ * @param p_conn proxy connection
+ * @param origin connection rec of origin
+ * @param bb brigade to send to origin
+ * @param flush flush
+ * @return status (OK)
+ */
+PROXY_DECLARE(int) ap_proxy_pass_brigade(apr_bucket_alloc_t *bucket_alloc,
+ request_rec *r, proxy_conn_rec *p_conn,
+ conn_rec *origin, apr_bucket_brigade *bb,
+ int flush);
+
#define PROXY_LBMETHOD "proxylbmethod"
/* The number of dynamic workers that can be added when reconfiguring.
Index: modules/proxy/mod_proxy_wstunnel.c
--- modules/proxy/mod_proxy_wstunnel.c.orig 2016-04-30 14:54:41.903080391 +0200
+++ modules/proxy/mod_proxy_wstunnel.c 2016-04-30 14:55:54.131652877 +0200
@@ -0,0 +1,424 @@
+/* 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"
+
+module AP_MODULE_DECLARE_DATA proxy_wstunnel_module;
+
+/*
+ * 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.
+ */
+static int proxy_wstunnel_canon(request_rec *r, char *url)
+{
+ char *host, *path, sport[7];
+ char *search = NULL;
+ const char *err;
+ char *scheme;
+ apr_port_t port, def_port;
+
+ /* ap_port_of_scheme() */
+ if (strncasecmp(url, "ws:", 3) == 0) {
+ url += 3;
+ scheme = "ws:";
+ def_port = apr_uri_port_of_scheme("http");
+ }
+ else if (strncasecmp(url, "wss:", 4) == 0) {
+ url += 4;
+ scheme = "wss:";
+ def_port = apr_uri_port_of_scheme("https");
+ }
+ else {
+ return DECLINED;
+ }
+
+ port = def_port;
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "canonicalising URL %s", url);
+
+ /*
+ * do syntactic check.
+ * We break the URL into host, port, path, search
+ */
+ err = ap_proxy_canon_netloc(r->pool, &url, NULL, NULL, &host, &port);
+ if (err) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "AH02439: " "error parsing URL %s: %s",
+ url, err);
+ return HTTP_BAD_REQUEST;
+ }
+
+ /*
+ * now parse path/search args, according to rfc1738:
+ * process the path. With proxy-nocanon set (by
+ * mod_proxy) we use the raw, unparsed uri
+ */
+ if (apr_table_get(r->notes, "proxy-nocanon")) {
+ path = url; /* this is the raw path */
+ }
+ else {
+ path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, 0,
+ r->proxyreq);
+ search = r->args;
+ }
+ if (path == NULL)
+ return HTTP_BAD_REQUEST;
+
+ apr_snprintf(sport, sizeof(sport), ":%d", port);
+
+ 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 int proxy_wstunnel_transfer(request_rec *r, conn_rec *c_i, conn_rec *c_o,
+ apr_bucket_brigade *bb, char *name)
+{
+ int rv;
+#ifdef DEBUGGING
+ apr_off_t len;
+#endif
+
+ do {
+ apr_brigade_cleanup(bb);
+ rv = ap_get_brigade(c_i->input_filters, bb, AP_MODE_READBYTES,
+ APR_NONBLOCK_READ, AP_IOBUFSIZE);
+ if (rv == APR_SUCCESS) {
+ if (c_o->aborted) {
+ rv = APR_EPIPE;
+ break;
+ }
+ if (APR_BRIGADE_EMPTY(bb)) {
+ break;
+ }
+#ifdef DEBUGGING
+ len = -1;
+ apr_brigade_length(bb, 0, &len);
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "AH02440: "
+ "read %" APR_OFF_T_FMT
+ " bytes from %s", len, name);
+#endif
+ rv = ap_pass_brigade(c_o->output_filters, bb);
+ if (rv == APR_SUCCESS) {
+ apr_brigade_cleanup(bb);
+ ap_fflush(c_o->output_filters, bb);
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "AH02441: "
+ "error on %s - ap_pass_brigade",
+ name);
+ }
+ } else if (!APR_STATUS_IS_EAGAIN(rv) && !APR_STATUS_IS_EOF(rv)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, "AH02442: "
+ "error on %s - ap_get_brigade",
+ name);
+ }
+ } while (rv == APR_SUCCESS);
+ apr_brigade_cleanup(bb);
+
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, "wstunnel_transfer complete");
+
+ if (APR_STATUS_IS_EAGAIN(rv)) {
+ rv = APR_SUCCESS;
+ }
+
+ return rv;
+}
+
+/* Search thru the input filters and remove the reqtimeout one */
+static void remove_reqtimeout(ap_filter_t *next)
+{
+ ap_filter_t *reqto = NULL;
+ ap_filter_rec_t *filter;
+
+ filter = ap_get_input_filter_handle("reqtimeout");
+ if (!filter) {
+ return;
+ }
+
+ while (next) {
+ if (next->frec == filter) {
+ reqto = next;
+ break;
+ }
+ next = next->next;
+ }
+ if (reqto) {
+ ap_remove_input_filter(reqto);
+ }
+}
+
+/*
+ * process the request and write the response.
+ */
+static int ap_proxy_wstunnel_request(apr_pool_t *p, request_rec *r,
+ proxy_conn_rec *conn,
+ proxy_worker *worker,
+ proxy_server_conf *conf,
+ apr_uri_t *uri,
+ char *url, char *server_portstr)
+{
+ apr_status_t rv = APR_SUCCESS;
+ apr_pollset_t *pollset;
+ apr_pollfd_t pollfd;
+ const apr_pollfd_t *signalled;
+ apr_int32_t pollcnt, pi;
+ apr_int16_t pollevent;
+ conn_rec *c = r->connection;
+ apr_socket_t *sock = conn->sock;
+ conn_rec *backconn = conn->connection;
+ char *buf;
+ apr_bucket_brigade *header_brigade;
+ apr_bucket *e;
+ char *old_cl_val = NULL;
+ char *old_te_val = NULL;
+ apr_bucket_brigade *bb = apr_brigade_create(p, c->bucket_alloc);
+ apr_socket_t *client_socket = ap_get_module_config(c->conn_config, &core_module);
+
+ header_brigade = apr_brigade_create(p, backconn->bucket_alloc);
+
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "sending request");
+
+ rv = ap_proxy_create_hdrbrgd(p, header_brigade, r, conn,
+ worker, conf, uri, url, server_portstr,
+ &old_cl_val, &old_te_val);
+ if (rv != OK) {
+ return rv;
+ }
+
+ buf = apr_pstrcat(p, "Upgrade: WebSocket", CRLF, "Connection: Upgrade", CRLF, 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 ((rv = ap_proxy_pass_brigade(c->bucket_alloc, r, conn, backconn,
+ header_brigade, 1)) != OK)
+ return rv;
+
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "setting up poll()");
+
+ if ((rv = apr_pollset_create(&pollset, 2, p, 0)) != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "AH02443: "
+ "error apr_pollset_create()");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+#if 0
+ apr_socket_opt_set(sock, APR_SO_NONBLOCK, 1);
+ apr_socket_opt_set(sock, APR_SO_KEEPALIVE, 1);
+ apr_socket_opt_set(client_socket, APR_SO_NONBLOCK, 1);
+ apr_socket_opt_set(client_socket, APR_SO_KEEPALIVE, 1);
+#endif
+
+ pollfd.p = p;
+ pollfd.desc_type = APR_POLL_SOCKET;
+ pollfd.reqevents = APR_POLLIN | APR_POLLHUP;
+ pollfd.desc.s = sock;
+ pollfd.client_data = NULL;
+ apr_pollset_add(pollset, &pollfd);
+
+ pollfd.desc.s = client_socket;
+ apr_pollset_add(pollset, &pollfd);
+
+ remove_reqtimeout(c->input_filters);
+
+ r->output_filters = c->output_filters;
+ r->proto_output_filters = c->output_filters;
+ r->input_filters = c->input_filters;
+ r->proto_input_filters = c->input_filters;
+
+ /* This handler should take care of the entire connection; make it so that
+ * nothing else is attempted on the connection after returning. */
+ c->keepalive = AP_CONN_CLOSE;
+
+ while (1) { /* Infinite loop until error (one side closes the connection) */
+ if ((rv = apr_pollset_poll(pollset, -1, &pollcnt, &signalled))
+ != APR_SUCCESS) {
+ if (APR_STATUS_IS_EINTR(rv)) {
+ continue;
+ }
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "AH02444: " "error apr_poll()");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "AH02445: "
+ "woke from poll(), i=%d", pollcnt);
+
+ for (pi = 0; pi < pollcnt; pi++) {
+ const apr_pollfd_t *cur = &signalled[pi];
+
+ if (cur->desc.s == sock) {
+ pollevent = cur->rtnevents;
+ if (pollevent & (APR_POLLIN | APR_POLLHUP)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "AH02446: "
+ "sock was readable");
+ rv = proxy_wstunnel_transfer(r, backconn, c, bb, "sock");
+ }
+ else if (pollevent & APR_POLLERR) {
+ rv = APR_EPIPE;
+ ap_log_rerror(APLOG_MARK, APLOG_NOTICE, 0, r, "AH02447: "
+ "err/hup on backconn");
+ }
+ else {
+ rv = APR_EGENERAL;
+ ap_log_rerror(APLOG_MARK, APLOG_NOTICE, 0, r, "AH02605: "
+ "unknown event on backconn %d", pollevent);
+ }
+ }
+ else if (cur->desc.s == client_socket) {
+ pollevent = cur->rtnevents;
+ if (pollevent & (APR_POLLIN | APR_POLLHUP)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "AH02448: "
+ "client was readable");
+ rv = proxy_wstunnel_transfer(r, c, backconn, bb, "client");
+ }
+ else if (pollevent & APR_POLLERR) {
+ rv = APR_EPIPE;
+ c->aborted = 1;
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "AH02607: "
+ "error on client conn");
+ }
+ else {
+ rv = APR_EGENERAL;
+ ap_log_rerror(APLOG_MARK, APLOG_NOTICE, 0, r, "AH02606: "
+ "unknown event on client conn %d", pollevent);
+ }
+ }
+ else {
+ rv = APR_EBADF;
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "AH02449: "
+ "unknown socket in pollset");
+ }
+
+ }
+ if (rv != APR_SUCCESS) {
+ break;
+ }
+ }
+
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "finished with poll() - cleaning up");
+
+ return OK;
+}
+
+/*
+ */
+static int proxy_wstunnel_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];
+ proxy_conn_rec *backend = NULL;
+ char *scheme;
+ int retry;
+ conn_rec *c = r->connection;
+ apr_pool_t *p = r->pool;
+ apr_uri_t *uri;
+ int is_ssl = 0;
+
+ if (strncasecmp(url, "wss:", 4) == 0) {
+ scheme = "WSS";
+ is_ssl = 1;
+ }
+ else if (strncasecmp(url, "ws:", 3) == 0) {
+ scheme = "WS";
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "AH02450: " "declining URL %s", url);
+ return DECLINED;
+ }
+
+ uri = apr_palloc(p, sizeof(*uri));
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "AH02451: " "serving URL %s", url);
+
+ /* create space for state information */
+ status = ap_proxy_acquire_connection(scheme, &backend, worker,
+ r->server);
+ if (status != OK) {
+ if (backend) {
+ backend->close = 1;
+ ap_proxy_release_connection(scheme, backend, r->server);
+ }
+ return status;
+ }
+
+ backend->is_ssl = is_ssl;
+ backend->close = 0;
+
+ retry = 0;
+ while (retry < 2) {
+ char *locurl = url;
+ /* Step One: Determine Who To Connect To */
+ status = ap_proxy_determine_connection(p, r, conf, worker, backend,
+ uri, &locurl, proxyname, proxyport,
+ server_portstr,
+ sizeof(server_portstr));
+
+ if (status != OK)
+ break;
+
+ /* Step Two: Make the Connection */
+ if (ap_proxy_connect_backend(scheme, backend, worker, r->server)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "AH02452: "
+ "failed to make connection to backend: %s",
+ backend->hostname);
+ status = HTTP_SERVICE_UNAVAILABLE;
+ break;
+ }
+ /* Step Three: Create conn_rec */
+ if (!backend->connection) {
+ if ((status = ap_proxy_connection_create(scheme, backend,
+ c, r->server)) != OK)
+ break;
+ }
+
+ backend->close = 1; /* must be after ap_proxy_determine_connection */
+
+
+ /* Step Three: Process the Request */
+ status = ap_proxy_wstunnel_request(p, r, backend, worker, conf, uri, locurl,
+ server_portstr);
+ break;
+ }
+
+ /* Do not close the socket */
+ ap_proxy_release_connection(scheme, backend, r->server);
+ return status;
+}
+
+static void ap_proxy_http_register_hook(apr_pool_t *p)
+{
+ proxy_hook_scheme_handler(proxy_wstunnel_handler, NULL, NULL, APR_HOOK_FIRST);
+ proxy_hook_canon_handler(proxy_wstunnel_canon, NULL, NULL, APR_HOOK_FIRST);
+}
+
+module AP_MODULE_DECLARE_DATA proxy_wstunnel_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 */
+};
Index: modules/proxy/proxy_util.c
--- modules/proxy/proxy_util.c.orig 2015-07-15 18:10:27.000000000 +0200
+++ modules/proxy/proxy_util.c 2016-04-30 14:54:41.903080391 +0200
@@ -2797,3 +2797,329 @@
}
return rv;
}
+
+/* Clear all connection-based headers from the incoming headers table */
+typedef struct header_dptr {
+ apr_pool_t *pool;
+ apr_table_t *table;
+ apr_time_t time;
+} header_dptr;
+
+static int clear_conn_headers(void *data, const char *key, const char *val)
+{
+ apr_table_t *headers = ((header_dptr*)data)->table;
+ apr_pool_t *pool = ((header_dptr*)data)->pool;
+ const char *name;
+ char *next = apr_pstrdup(pool, val);
+ while (*next) {
+ name = next;
+ while (*next && !apr_isspace(*next) && (*next != ',')) {
+ ++next;
+ }
+ while (*next && (apr_isspace(*next) || (*next == ','))) {
+ *next++ = '\0';
+ }
+ apr_table_unset(headers, name);
+ }
+ return 1;
+}
+
+static void proxy_clear_connection(apr_pool_t *p, apr_table_t *headers)
+{
+ header_dptr x;
+ x.pool = p;
+ x.table = headers;
+ apr_table_unset(headers, "Proxy-Connection");
+ apr_table_do(clear_conn_headers, &x, headers, "Connection", NULL);
+ apr_table_unset(headers, "Connection");
+}
+
+PROXY_DECLARE(int) ap_proxy_create_hdrbrgd(apr_pool_t *p,
+ apr_bucket_brigade *header_brigade,
+ request_rec *r,
+ proxy_conn_rec *p_conn,
+ proxy_worker *worker,
+ proxy_server_conf *conf,
+ apr_uri_t *uri,
+ char *url, char *server_portstr,
+ char **old_cl_val,
+ char **old_te_val)
+{
+ conn_rec *c = r->connection;
+ int counter;
+ char *buf;
+ const apr_array_header_t *headers_in_array;
+ const apr_table_entry_t *headers_in;
+ apr_table_t *headers_in_copy;
+ apr_bucket *e;
+ int do_100_continue;
+ conn_rec *origin = p_conn->connection;
+ proxy_dir_conf *dconf = ap_get_module_config(r->per_dir_config, &proxy_module);
+
+ /*
+ * To be compliant, we only use 100-Continue for requests with bodies.
+ * We also make sure we won't be talking HTTP/1.0 as well.
+ */
+ do_100_continue = (worker->ping_timeout_set
+ && !r->header_only
+ && (apr_table_get(r->headers_in, "Content-Length")
+ || apr_table_get(r->headers_in, "Transfer-Encoding"))
+ && (PROXYREQ_REVERSE == r->proxyreq)
+ && !(apr_table_get(r->subprocess_env, "force-proxy-request-1.0")));
+
+ if (apr_table_get(r->subprocess_env, "force-proxy-request-1.0")) {
+ /*
+ * According to RFC 2616 8.2.3 we are not allowed to forward an
+ * Expect: 100-continue to an HTTP/1.0 server. Instead we MUST return
+ * a HTTP_EXPECTATION_FAILED
+ */
+ if (r->expecting_100) {
+ return HTTP_EXPECTATION_FAILED;
+ }
+ buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.0" CRLF, NULL);
+ p_conn->close = 1;
+ } else {
+ buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.1" CRLF, NULL);
+ }
+ if (apr_table_get(r->subprocess_env, "proxy-nokeepalive")) {
+ origin->keepalive = AP_CONN_CLOSE;
+ p_conn->close = 1;
+ }
+ 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 (ap_strchr_c(uri->hostname, ':')) { /* if literal IPv6 address */
+ 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 {
+ 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, "AH01092: "
+ "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)
+ );
+ }
+
+ /* Use HTTP/1.1 100-Continue as quick "HTTP ping" test
+ * to backend
+ */
+ if (do_100_continue) {
+ apr_table_mergen(r->headers_in, "Expect", "100-Continue");
+ r->expecting_100 = 1;
+ }
+
+ /* 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",
+ c->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);
+ }
+
+ proxy_run_fixups(r);
+ /*
+ * Make a copy of the headers_in table before clearing the connection
+ * headers as we need the connection headers later in the http output
+ * filter to prepare the correct response headers.
+ *
+ * Note: We need to take r->pool for apr_table_copy as the key / value
+ * pairs in r->headers_in have been created out of r->pool and
+ * p might be (and actually is) a longer living pool.
+ * This would trigger the bad pool ancestry abort in apr_table_copy if
+ * apr is compiled with APR_POOL_DEBUG.
+ */
+ headers_in_copy = apr_table_copy(r->pool, r->headers_in);
+ proxy_clear_connection(p, headers_in_copy);
+ /* send request headers */
+ headers_in_array = apr_table_elts(headers_in_copy);
+ 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
+
+ /* Already sent */
+ || !strcasecmp(headers_in[counter].key, "Host")
+
+ /* Clear out hop-by-hop request headers not to send
+ * RFC2616 13.5.1 says we should strip these headers
+ */
+ || !strcasecmp(headers_in[counter].key, "Keep-Alive")
+ || !strcasecmp(headers_in[counter].key, "TE")
+ || !strcasecmp(headers_in[counter].key, "Trailer")
+ || !strcasecmp(headers_in[counter].key, "Upgrade")
+
+ ) {
+ continue;
+ }
+ /* Do we want to strip Proxy-Authorization ?
+ * If we haven't used it, then NO
+ * If we have used it then MAYBE: RFC2616 says we MAY propagate it.
+ * So let's make it configurable by env.
+ */
+ if (!strcasecmp(headers_in[counter].key,"Proxy-Authorization")) {
+ if (r->user != NULL) { /* we've authenticated */
+ if (!apr_table_get(r->subprocess_env, "Proxy-Chain-Auth")) {
+ continue;
+ }
+ }
+ }
+
+ /* Skip Transfer-Encoding and Content-Length for now.
+ */
+ if (!strcasecmp(headers_in[counter].key, "Transfer-Encoding")) {
+ *old_te_val = headers_in[counter].val;
+ continue;
+ }
+ if (!strcasecmp(headers_in[counter].key, "Content-Length")) {
+ *old_cl_val = headers_in[counter].val;
+ continue;
+ }
+
+ /* for sub-requests, ignore freshness/expiry headers */
+ if (r->main) {
+ if ( !strcasecmp(headers_in[counter].key, "If-Match")
+ || !strcasecmp(headers_in[counter].key, "If-Modified-Since")
+ || !strcasecmp(headers_in[counter].key, "If-Range")
+ || !strcasecmp(headers_in[counter].key, "If-Unmodified-Since")
+ || !strcasecmp(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);
+ }
+ return OK;
+}
+
+PROXY_DECLARE(int) ap_proxy_pass_brigade(apr_bucket_alloc_t *bucket_alloc,
+ request_rec *r, proxy_conn_rec *p_conn,
+ conn_rec *origin, apr_bucket_brigade *bb,
+ int flush)
+{
+ apr_status_t status;
+ apr_off_t transferred;
+
+ if (flush) {
+ apr_bucket *e = apr_bucket_flush_create(bucket_alloc);
+ APR_BRIGADE_INSERT_TAIL(bb, e);
+ }
+ apr_brigade_length(bb, 0, &transferred);
+ if (transferred != -1)
+ p_conn->worker->s->transferred += transferred;
+ status = ap_pass_brigade(origin->output_filters, bb);
+ if (status != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server,
+ "proxy: pass request body failed to %pI (%s)",
+ p_conn->addr, p_conn->hostname);
+ if (origin->aborted) {
+ const char *ssl_note;
+
+ if (((ssl_note = apr_table_get(origin->notes, "SSL_connect_rv"))
+ != NULL) && (strcmp(ssl_note, "err") == 0)) {
+ return ap_proxyerror(r, HTTP_INTERNAL_SERVER_ERROR,
+ "Error during SSL Handshake with"
+ " remote server");
+ }
+ return APR_STATUS_IS_TIMEUP(status) ? HTTP_GATEWAY_TIME_OUT : HTTP_BAD_GATEWAY;
+ }
+ else {
+ return HTTP_BAD_REQUEST;
+ }
+ }
+ apr_brigade_cleanup(bb);
+ return OK;
+}