+++ /dev/null
-/* Copyright 1999-2005 The Apache Software Foundation or its licensors, as
- * applicable.
- *
- * 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_server_conf *conf,
- char *url, const char *proxyname,
- apr_port_t proxyport);
-
-typedef struct {
- const char *name;
- apr_port_t port;
- apr_sockaddr_t *addr;
- apr_socket_t *sock;
- int close;
-} proxy_http_conn_t;
-
-static apr_status_t ap_proxy_http_cleanup(request_rec *r,
- proxy_http_conn_t *p_conn,
- 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 && 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");
-}
-
-static
-apr_status_t ap_proxy_http_determine_connection(apr_pool_t *p, request_rec *r,
- proxy_http_conn_t *p_conn,
- conn_rec *c,
- proxy_server_conf *conf,
- apr_uri_t *uri,
- char **url,
- const char *proxyname,
- apr_port_t proxyport,
- char *server_portstr,
- int server_portstr_size) {
- int server_port;
- apr_status_t err;
- apr_sockaddr_t *uri_addr;
- /*
- * 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(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_port_of_scheme(uri->scheme);
- }
-
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 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) {
- p_conn->name = apr_pstrdup(c->pool, proxyname);
- p_conn->port = proxyport;
- /* see memory note above */
- err = apr_sockaddr_info_get(&p_conn->addr, p_conn->name, APR_UNSPEC,
- p_conn->port, 0, c->pool);
- } else {
- p_conn->name = apr_pstrdup(c->pool, uri->hostname);
- p_conn->port = uri->port;
- p_conn->addr = uri_addr;
- *url = apr_pstrcat(p, uri->path, uri->query ? "?" : "",
- uri->query ? uri->query : "",
- uri->fragment ? "#" : "",
- uri->fragment ? uri->fragment : "", NULL);
- }
-
- if (err != APR_SUCCESS) {
- return ap_proxyerror(r, HTTP_BAD_GATEWAY,
- apr_pstrcat(p, "DNS lookup failure for: ",
- p_conn->name, NULL));
- }
-
- /* Get the server port for the Via headers */
- {
- server_port = ap_get_server_port(r);
- if (ap_is_default_port(server_port, r)) {
- strcpy(server_portstr,"");
- } else {
- apr_snprintf(server_portstr, server_portstr_size, ":%d",
- server_port);
- }
- }
-
- /* 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");
- }
- return OK;
-}
-
-static
-apr_status_t ap_proxy_http_create_connection(apr_pool_t *p, request_rec *r,
- proxy_http_conn_t *p_conn,
- conn_rec *c, conn_rec **origin,
- proxy_conn_rec *backend,
- proxy_server_conf *conf,
- const char *proxyname) {
- int failed=0, new=0;
- apr_socket_t *client_socket = NULL;
-
- /* 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 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) {
- client_socket = ap_get_module_config(backend->connection->conn_config, &core_module);
- if ((backend->connection->id == c->id) &&
- (backend->port == p_conn->port) &&
- (backend->hostname) &&
- (!apr_strnatcasecmp(backend->hostname, p_conn->name))) {
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
- "proxy: keepalive address match (keep original socket)");
- } else {
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
- "proxy: keepalive address mismatch / connection has"
- " changed (close old socket (%s/%s, %d/%d))",
- p_conn->name, backend->hostname, p_conn->port,
- backend->port);
- apr_socket_close(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)) {
- apr_size_t buffer_len = 1;
- char test_buffer[1];
- apr_status_t socket_status;
- apr_interval_time_t current_timeout;
-
- /* use previous keepalive socket */
- *origin = backend->connection;
- p_conn->sock = client_socket;
- new = 0;
-
- /* save timeout */
- apr_socket_timeout_get(p_conn->sock, ¤t_timeout);
- /* set no timeout */
- apr_socket_timeout_set(p_conn->sock, 0);
- socket_status = apr_recv(p_conn->sock, test_buffer, &buffer_len);
- /* put back old timeout */
- apr_socket_timeout_set(p_conn->sock, current_timeout);
- if ( APR_STATUS_IS_EOF(socket_status) ) {
- ap_log_error(APLOG_MARK, APLOG_INFO, 0, NULL,
- "proxy: previous connection is closed, creating a new connection.");
- new = 1;
- }
- }
- if (new) {
- int rc;
-
- /* create a new socket */
- backend->connection = NULL;
-
- /*
- * 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
- */
- failed = ap_proxy_connect_to_backend(&p_conn->sock, "HTTP",
- p_conn->addr, p_conn->name,
- conf, r->server, c->pool);
-
- /* handle a permanent error on the connect */
- if (failed) {
- if (proxyname) {
- return DECLINED;
- } else {
- return HTTP_BAD_GATEWAY;
- }
- }
-
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
- "proxy: socket is connected");
-
- /* the socket is now open, create a new backend server connection */
- *origin = ap_run_create_connection(c->pool, r->server, p_conn->sock,
- r->connection->id,
- r->connection->sbh, c->bucket_alloc);
- if (!*origin) {
- /* the peer reset the connection already; ap_run_create_connection()
- * closed the socket
- */
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
- r->server, "proxy: an error occurred creating a "
- "new connection to %pI (%s)", p_conn->addr,
- p_conn->name);
- apr_socket_close(p_conn->sock);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
- backend->connection = *origin;
- backend->hostname = apr_pstrdup(c->pool, p_conn->name);
- backend->port = p_conn->port;
-
- if (backend->is_ssl) {
- if (!ap_proxy_ssl_enable(backend->connection)) {
- ap_log_error(APLOG_MARK, APLOG_ERR, 0,
- r->server, "proxy: failed to enable ssl support "
- "for %pI (%s)", p_conn->addr, p_conn->name);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
- }
- else {
- ap_proxy_ssl_disable(backend->connection);
- }
-
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
- "proxy: connection complete to %pI (%s)",
- p_conn->addr, p_conn->name);
-
- /* set up the connection filters */
- rc = ap_run_pre_connection(*origin, p_conn->sock);
- if (rc != OK && rc != DONE) {
- (*origin)->aborted = 1;
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
- "proxy: HTTP: pre_connection setup failed (%d)",
- rc);
- return rc;
- }
- }
- return OK;
-}
-
-static void add_te_chunked(apr_pool_t *p,
- apr_bucket_alloc_t *bucket_alloc,
- apr_bucket_brigade *header_brigade)
-{
- apr_bucket *e;
- char *buf;
- 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, sizeof(te_hdr)-1, p, bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(header_brigade, e);
-}
-
-static void add_cl(apr_pool_t *p,
- apr_bucket_alloc_t *bucket_alloc,
- apr_bucket_brigade *header_brigade,
- const char *cl_val)
-{
- apr_bucket *e;
- char *buf;
-
- buf = apr_pstrcat(p, "Content-Length: ",
- cl_val,
- CRLF,
- NULL);
- ap_xlate_proto_to_ascii(buf, strlen(buf));
- e = apr_bucket_pool_create(buf, strlen(buf), p, bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(header_brigade, e);
-}
-
-#define ASCII_CRLF "\015\012"
-#define ASCII_ZERO "\060"
-
-static void terminate_headers(apr_bucket_alloc_t *bucket_alloc,
- apr_bucket_brigade *header_brigade)
-{
- apr_bucket *e;
-
- /* add empty line at the end of the headers */
- e = apr_bucket_immortal_create(ASCII_CRLF, 2, bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(header_brigade, e);
-}
-
-static apr_status_t pass_brigade(apr_bucket_alloc_t *bucket_alloc,
- request_rec *r, proxy_http_conn_t *p_conn,
- conn_rec *origin, apr_bucket_brigade *b,
- int flush)
-{
- apr_status_t status;
-
- if (flush) {
- apr_bucket *e = apr_bucket_flush_create(bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(b, e);
- }
- status = ap_pass_brigade(origin->output_filters, b);
- if (status != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server,
- "proxy: pass request data failed to %pI (%s)",
- p_conn->addr, p_conn->name);
- return status;
- }
- apr_brigade_cleanup(b);
- return APR_SUCCESS;
-}
-
-static apr_status_t stream_reqbody_chunked(apr_pool_t *p,
- request_rec *r,
- proxy_http_conn_t *p_conn,
- conn_rec *origin,
- apr_bucket_brigade *header_brigade)
-{
- int seen_eos = 0;
- apr_size_t hdr_len;
- apr_off_t bytes;
- apr_status_t status;
- apr_bucket_alloc_t *bucket_alloc = r->connection->bucket_alloc;
- apr_bucket_brigade *b, *input_brigade;
- apr_bucket *e;
-
- input_brigade = apr_brigade_create(p, bucket_alloc);
-
- 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 contains 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);
- }
-
- 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,
- bucket_alloc);
- APR_BRIGADE_INSERT_HEAD(input_brigade, e);
-
- /*
- * Append the end-of-chunk CRLF
- */
- e = apr_bucket_immortal_create(ASCII_CRLF, 2, bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(input_brigade, e);
-
- if (header_brigade) {
- /* we never sent the header brigade, so go ahead and
- * take care of that now
- */
- add_te_chunked(p, bucket_alloc, header_brigade);
- terminate_headers(bucket_alloc, header_brigade);
- b = header_brigade;
- APR_BRIGADE_CONCAT(b, input_brigade);
- header_brigade = NULL;
- }
- else {
- b = input_brigade;
- }
-
- status = pass_brigade(bucket_alloc, r, p_conn, origin, b, 0);
- if (status != APR_SUCCESS) {
- return status;
- }
- } while (!seen_eos);
-
- if (header_brigade) {
- /* we never sent the header brigade because there was no request body;
- * send it now without T-E
- */
- terminate_headers(bucket_alloc, header_brigade);
- b = header_brigade;
- }
- else {
- if (!APR_BRIGADE_EMPTY(input_brigade)) {
- /* input brigade still has an EOS which we can't pass to the output_filters. */
- e = APR_BRIGADE_LAST(input_brigade);
- AP_DEBUG_ASSERT(APR_BUCKET_IS_EOS(e));
- apr_bucket_delete(e);
- }
- e = apr_bucket_immortal_create(ASCII_ZERO ASCII_CRLF
- /* <trailers> */
- ASCII_CRLF,
- 5, bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(input_brigade, e);
- b = input_brigade;
- }
-
- status = pass_brigade(bucket_alloc, r, p_conn, origin, b, 1);
- return status;
-}
-
-static apr_status_t stream_reqbody_cl(apr_pool_t *p,
- request_rec *r,
- proxy_http_conn_t *p_conn,
- conn_rec *origin,
- apr_bucket_brigade *header_brigade,
- const char *old_cl_val)
-{
- int seen_eos = 0;
- apr_status_t status;
- apr_bucket_alloc_t *bucket_alloc = r->connection->bucket_alloc;
- apr_bucket_brigade *b, *input_brigade;
- apr_bucket *e;
-
- input_brigade = apr_brigade_create(p, bucket_alloc);
-
- do {
- 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 contains 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 (header_brigade) {
- /* we never sent the header brigade, so go ahead and
- * take care of that now
- */
- add_cl(p, bucket_alloc, header_brigade, old_cl_val);
- terminate_headers(bucket_alloc, header_brigade);
- b = header_brigade;
- APR_BRIGADE_CONCAT(b, input_brigade);
- header_brigade = NULL;
- }
- else {
- b = input_brigade;
- }
-
- status = pass_brigade(bucket_alloc, r, p_conn, origin, b, 0);
- if (status != APR_SUCCESS) {
- return status;
- }
- } while (!seen_eos);
-
- if (header_brigade) {
- /* we never sent the header brigade since there was no request
- * body; send it now, and only specify C-L if client specified
- * C-L: 0
- */
- if (!strcmp(old_cl_val, "0")) {
- add_cl(p, bucket_alloc, header_brigade, old_cl_val);
- }
- terminate_headers(bucket_alloc, header_brigade);
- b = header_brigade;
- }
- else {
- /* need to flush any pending data */
- b = input_brigade; /* empty now; pass_brigade() will add flush */
- }
- status = pass_brigade(bucket_alloc, r, p_conn, origin, b, 1);
- return status;
-}
-
-#define MAX_MEM_SPOOL 16384
-
-static apr_status_t spool_reqbody_cl(apr_pool_t *p,
- request_rec *r,
- proxy_http_conn_t *p_conn,
- conn_rec *origin,
- apr_bucket_brigade *header_brigade)
-{
- int seen_eos = 0;
- apr_status_t status;
- apr_bucket_alloc_t *bucket_alloc = r->connection->bucket_alloc;
- apr_bucket_brigade *body_brigade, *input_brigade;
- apr_bucket *e;
- apr_off_t bytes, bytes_spooled = 0, fsize = 0;
- apr_file_t *tmpfile = NULL;
-
- body_brigade = apr_brigade_create(p, bucket_alloc);
- input_brigade = apr_brigade_create(p, bucket_alloc);
-
- do {
- 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 contains 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);
- }
-
- apr_brigade_length(input_brigade, 1, &bytes);
-
- if (bytes_spooled + bytes > MAX_MEM_SPOOL) {
- /* can't spool any more in memory; write latest brigade to disk */
- if (tmpfile == NULL) {
- const char *temp_dir;
- char *template;
-
- status = apr_temp_dir_get(&temp_dir, p);
- if (status != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server,
- "proxy: search for temporary directory failed");
- return status;
- }
- apr_filepath_merge(&template, temp_dir,
- "modproxy.tmp.XXXXXX",
- APR_FILEPATH_NATIVE, p);
- status = apr_file_mktemp(&tmpfile, template, 0, p);
- if (status != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server,
- "proxy: creation of temporary file in directory %s failed",
- temp_dir);
- return status;
- }
- }
- for (e = APR_BRIGADE_FIRST(input_brigade);
- e != APR_BRIGADE_SENTINEL(input_brigade);
- e = APR_BUCKET_NEXT(e)) {
- const char *data;
- apr_size_t bytes_read, bytes_written;
-
- apr_bucket_read(e, &data, &bytes_read, APR_BLOCK_READ);
- status = apr_file_write_full(tmpfile, data, bytes_read, &bytes_written);
- if (status != APR_SUCCESS) {
- const char *tmpfile_name;
-
- if (apr_file_name_get(&tmpfile_name, tmpfile) != APR_SUCCESS) {
- tmpfile_name = "(unknown)";
- }
- ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server,
- "proxy: write to temporary file %s failed",
- tmpfile_name);
- return status;
- }
- AP_DEBUG_ASSERT(bytes_read == bytes_written);
- fsize += bytes_written;
- }
- apr_brigade_cleanup(input_brigade);
- }
- else {
- APR_BRIGADE_CONCAT(body_brigade, input_brigade);
- }
-
- bytes_spooled += bytes;
-
- } while (!seen_eos);
-
- if (bytes_spooled) {
- add_cl(p, bucket_alloc, header_brigade, apr_off_t_toa(p, bytes_spooled));
- }
- terminate_headers(bucket_alloc, header_brigade);
- APR_BRIGADE_CONCAT(header_brigade, body_brigade);
- if (tmpfile) {
- /* For platforms where the size of the file may be larger than
- * that which can be stored in a single bucket (where the
- * length field is an apr_size_t), split it into several
- * buckets: */
- if (sizeof(apr_off_t) > sizeof(apr_size_t)
- && fsize > AP_MAX_SENDFILE) {
- e = apr_bucket_file_create(tmpfile, 0, AP_MAX_SENDFILE, p,
- bucket_alloc);
- while (fsize > AP_MAX_SENDFILE) {
- apr_bucket *ce;
- apr_bucket_copy(e, &ce);
- APR_BRIGADE_INSERT_TAIL(header_brigade, ce);
- e->start += AP_MAX_SENDFILE;
- fsize -= AP_MAX_SENDFILE;
- }
- e->length = (apr_size_t)fsize; /* Resize just the last bucket */
- }
- else {
- e = apr_bucket_file_create(tmpfile, 0, (apr_size_t)fsize, p,
- bucket_alloc);
- }
- APR_BRIGADE_INSERT_TAIL(header_brigade, e);
- }
- status = pass_brigade(bucket_alloc, r, p_conn, origin, header_brigade, 1);
- return status;
-}
-
-static apr_status_t send_request_body(apr_pool_t *p,
- request_rec *r,
- proxy_http_conn_t *p_conn,
- conn_rec *origin,
- apr_bucket_brigade *header_brigade,
- int force10)
-{
- enum {RB_INIT, RB_STREAM_CL, RB_STREAM_CHUNKED, RB_SPOOL_CL} rb_method = RB_INIT;
- const char *old_cl_val, *te_val;
- int cl_zero; /* client sent "Content-Length: 0", which we forward on to server */
- apr_status_t status;
-
- /* send CL or use chunked encoding?
- *
- * . CL is the most friendly to the origin server since it is the
- * most widely supported
- * . CL stinks if we don't know the length since we have to buffer
- * the data in memory or on disk until we get the entire data
- *
- * special cases to check for:
- * . if we're using HTTP/1.0 to origin server, then we must send CL
- * . if client sent C-L and there are no input resource filters, the
- * the body size can't change so we send the same CL and stream the
- * body
- * . if client used chunked or proxy-sendchunks is set, we'll also
- * use chunked
- *
- * normal case:
- * we have to compute content length by reading the entire request
- * body; if request body is not small, we'll spool the remaining input
- * to a temporary file
- *
- * special envvars to override the normal decision:
- * . proxy-sendchunks
- * use chunked encoding; not compatible with force-proxy-request-1.0
- * . proxy-sendcl
- * spool the request body to compute C-L
- * . proxy-sendunchangedcl
- * use C-L from client and spool the request body
- */
- old_cl_val = apr_table_get(r->headers_in, "Content-Length");
- cl_zero = old_cl_val && !strcmp(old_cl_val, "0");
-
- if (!force10
- && !cl_zero
- && apr_table_get(r->subprocess_env, "proxy-sendchunks")) {
- rb_method = RB_STREAM_CHUNKED;
- }
- else if (!cl_zero
- && apr_table_get(r->subprocess_env, "proxy-sendcl")) {
- rb_method = RB_SPOOL_CL;
- }
- else {
- if (old_cl_val &&
- (r->input_filters == r->proto_input_filters
- || cl_zero
- || apr_table_get(r->subprocess_env, "proxy-sendunchangedcl"))) {
- rb_method = RB_STREAM_CL;
- }
- else if (force10) {
- rb_method = RB_SPOOL_CL;
- }
- else if ((te_val = apr_table_get(r->headers_in, "Transfer-Encoding"))
- && !strcasecmp(te_val, "chunked")) {
- rb_method = RB_STREAM_CHUNKED;
- }
- else {
- rb_method = RB_SPOOL_CL;
- }
- }
-
- switch(rb_method) {
- case RB_STREAM_CHUNKED:
- status = stream_reqbody_chunked(p, r, p_conn, origin, header_brigade);
- break;
- case RB_STREAM_CL:
- status = stream_reqbody_cl(p, r, p_conn, origin, header_brigade, old_cl_val);
- break;
- case RB_SPOOL_CL:
- status = spool_reqbody_cl(p, r, p_conn, origin, header_brigade);
- break;
- default:
- ap_assert(1 != 1);
- }
-
- return status;
-}
-
-static
-apr_status_t ap_proxy_http_request(apr_pool_t *p, request_rec *r,
- proxy_http_conn_t *p_conn, conn_rec *origin,
- proxy_server_conf *conf,
- apr_uri_t *uri,
- char *url, apr_bucket_brigade *bb,
- char *server_portstr) {
- conn_rec *c = r->connection;
- char *buf;
- apr_bucket *e;
- const apr_array_header_t *headers_in_array;
- const apr_table_entry_t *headers_in;
- int counter;
- apr_status_t status;
- int force10;
-
- /*
- * 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.
- */
- p_conn->close += ap_proxy_liststr(apr_table_get(r->headers_in,
- "Connection"), "close");
- /* sub-requests never use keepalives */
- if (r->main) {
- p_conn->close++;
- }
-
- ap_proxy_clear_connection(p, r->headers_in);
- if (p_conn->close) {
- apr_table_setn(r->headers_in, "Connection", "close");
- origin->keepalive = AP_CONN_CLOSE;
- }
-
- if ( apr_table_get(r->subprocess_env,"force-proxy-request-1.0")) {
- buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.0" CRLF, NULL);
- force10 = 1;
- } else {
- buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.1" CRLF, NULL);
- force10 = 0;
- }
- 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(bb, 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(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 */
- 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'll add appropriate Content-Length later, if appropriate.
- */
- || !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;
- }
-
- /* If you POST to a page that gets server-side parsed
- * by mod_include, and the parsing results in a reverse
- * proxy call, the proxied request will be a GET, but
- * its request_rec will have inherited the Content-Length
- * of the original request (the POST for the enclosing
- * page). We can't send the original POST's request body
- * as part of the proxied subrequest, so we need to avoid
- * sending the corresponding content length. Otherwise,
- * the server to which we're proxying will sit there
- * forever, waiting for a request body that will never
- * arrive.
- */
- if ((r->method_number == M_GET) && headers_in[counter].key &&
- !apr_strnatcasecmp(headers_in[counter].key,
- "Content-Length")) {
- 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(bb, e);
- }
-
- /* send the request data, if any. */
- status = send_request_body(p, r, p_conn, origin, bb, force10);
- if (status != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server,
- "proxy: request failed to %pI (%s)",
- p_conn->addr, p_conn->name);
- return status;
- }
-
- return APR_SUCCESS;
-}
-
-static
-apr_status_t ap_proxy_http_process_response(apr_pool_t * p, request_rec *r,
- proxy_http_conn_t *p_conn,
- conn_rec *origin,
- proxy_conn_rec *backend,
- proxy_server_conf *conf,
- apr_bucket_brigade *bb,
- char *server_portstr) {
- conn_rec *c = r->connection;
- char buffer[HUGE_STRING_LEN];
- char keepchar;
- request_rec *rp;
- apr_bucket *e;
- int len, backasswards;
- int received_continue = 1; /* flag to indicate if we should
- * loop over response parsing logic
- * in the case that the origin told us
- * to HTTP_CONTINUE
- */
-
- /* 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;
-
- while (received_continue) {
- 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) {
- apr_socket_close(p_conn->sock);
- backend->connection = NULL;
- ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "proxy: error reading status line from remote "
- "server %s", p_conn->name);
- 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)) {
- apr_socket_close(p_conn->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;
-
- 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. */
-
- 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);
- p_conn->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;
-
- /* can't have both Content-Length and Transfer-Encoding */
- if (apr_table_get(r->headers_out, "Transfer-Encoding")
- && apr_table_get(r->headers_out, "Content-Length")) {
- /* 2616 section 4.4, point 3: "if both Transfer-Encoding
- * and Content-Length are received, the latter MUST be
- * ignored"; so unset it here to prevent any confusion
- * later. */
- apr_table_unset(r->headers_out, "Content-Length");
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
- r->server,
- "proxy: server %s returned Transfer-Encoding and Content-Length",
- p_conn->name);
- p_conn->close += 1;
- }
-
- /* strip connection listed hop-by-hop headers from response */
- p_conn->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) {
- /* 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),
- 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)) {
- p_conn->close += 1;
- origin->keepalive = AP_CONN_CLOSE;
- }
- } else {
- /* an http/0.9 response */
- backasswards = 1;
- r->status = 200;
- r->status_line = "200 OK";
- p_conn->close += 1;
- }
-
- if ( r->status != HTTP_CONTINUE ) {
- received_continue = 0;
- } else {
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL,
- "proxy: HTTP: received 100 CONTINUE");
- }
-
- /* 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));
- }
- }
-
- 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;
- 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 */
- (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 */
-
- /* 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) || r->status < 400 ) {
-
- /* 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
- */
- ap_proxy_http_cleanup(r, p_conn, backend);
- /* signal that we must leave */
- finish = TRUE;
- }
-
- /* try send what we read */
- if (ap_pass_brigade(r->output_filters, bb) != APR_SUCCESS
- || c->aborted) {
- /* Ack! Phbtt! Die! User aborted! */
- p_conn->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");
- }
- }
-
- if ( conf->error_override ) {
- /* the code above this checks for 'OK' which is what the hook expects */
- if ( r->status == HTTP_OK )
- 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 > 199) && /* not any 1xx response */
- (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(request_rec *r, proxy_http_conn_t *p_conn,
- 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 (p_conn->close || (r->proto_num < HTTP_VERSION(1,1))) {
- if (p_conn->sock) {
- apr_socket_close(p_conn->sock);
- p_conn->sock = NULL;
- backend->connection = NULL;
- }
- }
- 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_server_conf *conf,
- char *url, const char *proxyname,
- apr_port_t proxyport)
-{
- int status;
- char server_portstr[32];
- conn_rec *origin = NULL;
- 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_bucket_brigade *bb = apr_brigade_create(p, c->bucket_alloc);
- apr_uri_t *uri = apr_palloc(r->connection->pool, sizeof(*uri));
- proxy_http_conn_t *p_conn = apr_pcalloc(r->connection->pool,
- sizeof(*p_conn));
-
- /* is it for us? */
- if (strncasecmp(url, "https:", 6) == 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;
- }
- else if (!(strncasecmp(url, "http:", 5)==0 || (strncasecmp(url, "ftp:", 4)==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 */
- }
- 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) {
- backend = apr_pcalloc(c->pool, sizeof(proxy_conn_rec));
- backend->connection = NULL;
- backend->hostname = NULL;
- backend->port = 0;
- if (!r->main) {
- ap_set_module_config(c->conn_config, &proxy_http_module, backend);
- }
- }
-
- backend->is_ssl = is_ssl;
-
- /* Step One: Determine Who To Connect To */
- status = ap_proxy_http_determine_connection(p, r, p_conn, c, conf, uri,
- &url, proxyname, proxyport,
- server_portstr,
- sizeof(server_portstr));
- if ( status != OK ) {
- return status;
- }
-
- /* Step Two: Make the Connection */
- status = ap_proxy_http_create_connection(p, r, p_conn, c, &origin, backend,
- conf, proxyname);
- if ( status != OK ) {
- return status;
- }
-
- /* Step Three: Send the Request */
- status = ap_proxy_http_request(p, r, p_conn, origin, conf, uri, url, bb,
- server_portstr);
- if ( status != OK ) {
- return status;
- }
-
- /* Step Four: Receive the Response */
- status = ap_proxy_http_process_response(p, r, p_conn, origin, backend, conf,
- bb, server_portstr);
- if ( status != OK ) {
- /* clean up even if there is an error */
- ap_proxy_http_cleanup(r, p_conn, backend);
- return status;
- }
-
- /* Step Five: Clean Up */
- status = ap_proxy_http_cleanup(r, p_conn, 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 */
-};
-
projects / thirdparty / apache / httpd.git / commitdiff
