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eef8a5ccff043c25e20a79e1ebdd8fa91a4ad7ba
apache/modules/proxy/proxy_http.c
Ian Holsman eef8a5ccff applies change in APR function apr_socket_create, which added a new parameter. 
I defaulted these to APR_INHERIT.
Also..
the connection-close was being merged, insted of 'set'
PR:
Obtained from:
Submitted by:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89559 13f79535-47bb-0310-9956-ffa450edef68
2001-07-16 17:54:38 +00:00

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/* ====================================================================
* 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;
int ap_proxy_http_canon(request_rec *r, char *url);
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.
*/
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 = apr_uri_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.)
*/
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 = NULL;
apr_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 (APR_SUCCESS != apr_uri_parse_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 = apr_uri_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, APR_INHERIT, 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_setn(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_setn(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_setn(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_setn(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 (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)) {
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;
}
if (ap_pass_brigade(r->output_filters, bb) != APR_SUCCESS) {
/* Ack! Phbtt! Die! User aborted! */
close = 1; /* this causes socket close below */
break;
}
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 */
};
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