diff options
Diffstat (limited to 'modules/proxy/proxy_http.c')
| -rw-r--r-- | modules/proxy/proxy_http.c | 532 |
1 files changed, 0 insertions, 532 deletions
diff --git a/modules/proxy/proxy_http.c b/modules/proxy/proxy_http.c deleted file mode 100644 index de1ef550a3..0000000000 --- a/modules/proxy/proxy_http.c +++ /dev/null @@ -1,532 +0,0 @@ -/* ==================================================================== - * The Apache Software License, Version 1.1 - * - * Copyright (c) 2000 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 */ - -#define CORE_PRIVATE - -#include "mod_proxy.h" -#include "apr_strings.h" -#include "apr_buckets.h" -#include "util_filter.h" -#include "ap_config.h" -#include "http_log.h" -#include "http_main.h" -#include "http_core.h" -#include "http_connection.h" -#include "util_date.h" - -/* - * 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, const char *scheme, int def_port) -{ - char *host, *path, *search, sport[7]; - const char *err; - int port; - -/* 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 *proxy_location_reverse_map(request_rec *r, const char *url) -{ - void *sconf; - proxy_server_conf *conf; - struct proxy_alias *ent; - int i, l1, l2; - char *u; - - sconf = r->server->module_config; - conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module); - 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 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, char *url, - const char *proxyhost, int proxyport) -{ - const char *strp; - char *strp2; - char *desthost; - apr_socket_t *sock; - int i, len, backasswards, content_length = -1; - apr_status_t err; - apr_array_header_t *reqhdrs_arr; - apr_table_t *resp_hdrs = NULL; - apr_table_entry_t *reqhdrs; - struct sockaddr_in server; - struct in_addr destaddr; - char buffer[HUGE_STRING_LEN]; - char *buffer2; - char portstr[32]; - apr_pool_t *p = r->pool; - int destport = 0; - char *destportstr = NULL; - const char *urlptr = NULL; - apr_ssize_t cntr; - apr_file_t *cachefp = NULL; - char *buf; - conn_rec *origin; - apr_bucket *e; - apr_bucket_brigade *bb = apr_brigade_create(r->pool); - - void *sconf = r->server->module_config; - proxy_server_conf *conf = - (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); - struct noproxy_entry *npent = (struct noproxy_entry *) conf->noproxies->elts; - int nocache = 0; - - memset(&server, '\0', sizeof(server)); - server.sin_family = AF_INET; - -/* We break the URL into host, port, path-search */ - - urlptr = strstr(url, "://"); - if (urlptr == NULL) - return HTTP_BAD_REQUEST; - urlptr += 3; - destport = DEFAULT_HTTP_PORT; - strp = ap_strchr_c(urlptr, '/'); - if (strp == NULL) { - desthost = apr_pstrdup(p, urlptr); - urlptr = "/"; - } - else { - char *q = apr_palloc(p, strp - urlptr + 1); - memcpy(q, urlptr, strp - urlptr); - q[strp - urlptr] = '\0'; - urlptr = strp; - desthost = q; - } - - strp2 = ap_strchr(desthost, ':'); - if (strp2 != NULL) { - *(strp2++) = '\0'; - if (apr_isdigit(*strp2)) { - destport = atoi(strp2); - destportstr = strp2; - } - } - -/* check if ProxyBlock directive on this host */ - destaddr.s_addr = apr_inet_addr(desthost); - for (i = 0; i < conf->noproxies->nelts; i++) { - if ((npent[i].name != NULL - && ap_strstr_c(desthost, npent[i].name) != NULL) - || destaddr.s_addr == npent[i].addr.s_addr - || npent[i].name[0] == '*') - return ap_proxyerror(r, HTTP_FORBIDDEN, - "Connect to remote machine blocked"); - } - - if ((apr_socket_create(&sock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "proxy: error creating socket"); - return HTTP_INTERNAL_SERVER_ERROR; - } - -#if !defined(TPF) && !defined(BEOS) - if (conf->recv_buffer_size > 0 && apr_setsocketopt(sock, APR_SO_RCVBUF, - conf->recv_buffer_size)) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default"); - } -#endif - - if (proxyhost != NULL) { - err = ap_proxy_doconnect(sock, (char *)proxyhost, proxyport, r); - } - else { - err = ap_proxy_doconnect(sock, (char *)desthost, destport, r); - } - - if (err != APR_SUCCESS) { - if (proxyhost != NULL) - return DECLINED; /* try again another way */ - else - return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_pstrcat(r->pool, - "Could not connect to remote machine: ", - desthost, NULL)); - } - - origin = ap_new_connection(r->pool, r->server, sock, 0); - if (!origin) { - /* the peer reset the connection already; ap_new_connection() - * closed the socket */ - /* XXX somebody that knows what they're doing add an error path */ - } - - ap_add_output_filter("CORE", NULL, NULL, origin); - - clear_connection(r->pool, r->headers_in); /* Strip connection-based headers */ - - buf = apr_pstrcat(r->pool, r->method, " ", proxyhost ? url : urlptr, - " HTTP/1.0" CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), r->pool); - APR_BRIGADE_INSERT_TAIL(bb, e); - if (destportstr != NULL && destport != DEFAULT_HTTP_PORT) { - buf = apr_pstrcat(r->pool, "Host: ", desthost, ":", destportstr, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), r->pool); - APR_BRIGADE_INSERT_TAIL(bb, e); - } - else { - buf = apr_pstrcat(r->pool, "Host: ", desthost, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), r->pool); - APR_BRIGADE_INSERT_TAIL(bb, e); - } - - 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 */ - i = ap_get_server_port(r); - if (ap_is_default_port(i,r)) { - strcpy(portstr,""); - } else { - apr_snprintf(portstr, sizeof portstr, ":%d", i); - } - /* Generate outgoing Via: header with/without server comment: */ - ap_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), 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), portstr) - ); - } - - reqhdrs_arr = apr_table_elts(r->headers_in); - reqhdrs = (apr_table_entry_t *) reqhdrs_arr->elts; - for (i = 0; i < reqhdrs_arr->nelts; i++) { - if (reqhdrs[i].key == NULL || reqhdrs[i].val == NULL - /* Clear out headers not to send */ - || !strcasecmp(reqhdrs[i].key, "Host") /* Already sent */ - /* XXX: @@@ FIXME: "Proxy-Authorization" should *only* be - * suppressed if THIS server requested the authentication, - * not when a frontend proxy requested it! - */ - || !strcasecmp(reqhdrs[i].key, "Proxy-Authorization")) - continue; - buf = apr_pstrcat(r->pool, reqhdrs[i].key, ": ", reqhdrs[i].val, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), r->pool); - APR_BRIGADE_INSERT_TAIL(bb, e); - - } - - e = apr_bucket_pool_create(CRLF, strlen(CRLF), r->pool); - 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, r->pool); - APR_BRIGADE_INSERT_TAIL(bb, e); - } - } - /* Flush the data to the origin server */ - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - - ap_add_input_filter("HTTP_IN", NULL, NULL, origin); - ap_add_input_filter("CORE_IN", NULL, NULL, origin); - - apr_brigade_destroy(bb); - bb = apr_brigade_create(r->pool); - - /* Tell http_filter to grab the data one line at a time. */ - origin->remain = 0; - - ap_get_brigade(origin->input_filters, bb, AP_MODE_BLOCKING); - e = APR_BRIGADE_FIRST(bb); - apr_bucket_read(e, (const char **)&buffer2, &len, APR_BLOCK_READ); - if (len == -1) { - apr_socket_close(sock); - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "ap_get_brigade() - proxy receive - Error reading from remote server %s (length %d)", - proxyhost ? proxyhost : desthost, len); - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } else if (len == 0) { - apr_socket_close(sock); - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Document contains no data"); - } - APR_BUCKET_REMOVE(e); - apr_bucket_destroy(e); - -/* Is it an HTTP/1 response? This is buggy if we ever see an HTTP/1.10 */ - if (ap_checkmask(buffer2, "HTTP/#.# ###*")) { - int major, minor; - if (2 != sscanf(buffer2, "HTTP/%u.%u", &major, &minor)) { - major = 1; - minor = 0; - } - -/* If not an HTTP/1 message or if the status line was > 8192 bytes */ - if (buffer2[5] != '1' || buffer2[len - 1] != '\n') { - apr_socket_close(sock); - return HTTP_BAD_GATEWAY; - } - backasswards = 0; - buffer2[--len] = '\0'; - - buffer2[12] = '\0'; - r->status = atoi(&buffer2[9]); - - buffer2[12] = ' '; - r->status_line = apr_pstrdup(p, &buffer2[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. */ - - resp_hdrs = ap_proxy_read_headers(r, buffer, HUGE_STRING_LEN, origin); - if (resp_hdrs == 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); - nocache = 1; /* do not cache this broken file */ - } - else - { - clear_connection(p, resp_hdrs); /* Strip Connection hdrs */ - if (apr_table_get(resp_hdrs, "Content-type")) { - r->content_type = apr_pstrdup(r->pool, apr_table_get(resp_hdrs, "Content-type")); - } - } - - if (conf->viaopt != via_off && conf->viaopt != via_block) { - /* Create a "Via:" response header entry and merge it */ - i = ap_get_server_port(r); - if (ap_is_default_port(i,r)) { - strcpy(portstr,""); - } else { - apr_snprintf(portstr, sizeof portstr, ":%d", i); - } - } - } - else { -/* an http/0.9 response */ - backasswards = 1; - r->status = 200; - r->status_line = "200 OK"; - } - -/* - * HTTP/1.0 requires us to accept 3 types of dates, but only generate - * one type - */ - -#if 0 - if (ap_cache_el_header(c, "Date", &datestr) == APR_SUCCESS) - ap_cache_el_header_set(c, "Date", ap_proxy_date_canon(p, datestr)); - if (ap_cache_el_header(c, "Last-Modified", &datestr) == APR_SUCCESS) - ap_cache_el_header_set(c, "Last-Modified", ap_proxy_date_canon(p, datestr)); - if (ap_cache_el_header(c, "Expires", &datestr) == APR_SUCCESS) - ap_cache_el_header_set(c, "Expires", ap_proxy_date_canon(p, datestr)); - - if (ap_cache_el_header(c, "Location", &datestr) == APR_SUCCESS) - ap_cache_el_header_set(c, "Location", proxy_location_reverse_map(r, datestr)); - if (ap_cache_el_header(c, "URI", &datestr) == APR_SUCCESS) - ap_cache_el_header_set(c, "URI", proxy_location_reverse_map(r, datestr)); -#endif - -/* write status line */ -#if 0 - if (!r->assbackwards) - ap_rvputs(r, "HTTP/1.0 ", r->status_line, CRLF, NULL); - - if (cachefp && apr_file_puts(apr_pstrcat(r->pool, "HTTP/1.0 ", - r->status_line, CRLF, NULL), cachefp) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "proxy: error writing status line to cache"); - ap_proxy_cache_error(&c); - cachefp = NULL; - } -#endif - -#if 0 -/* send headers */ - ap_cache_el_header_walk(c, ap_proxy_send_hdr_line, r, NULL); -#endif -/* - if (!r->assbackwards) - ap_rputs(CRLF, r); -*/ - r->sent_bodyct = 1; -/* Is it an HTTP/0.9 response? If so, send the extra data */ - if (backasswards) { - cntr = len; - e = apr_bucket_heap_create(buffer, cntr, 0, NULL); - APR_BRIGADE_INSERT_TAIL(bb, e); - if (cachefp && apr_file_write(cachefp, buffer, &cntr) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, - "proxy: error writing extra data to cache"); - } - } - - /* send body */ - /* if header only, then cache will be NULL */ - /* HTTP/1.0 tells us to read to EOF, rather than content-length bytes */ - if (!r->header_only) { - proxy_completion pc; - pc.content_length = content_length; - pc.cache_completion = conf->cache_completion; - - origin->remain = content_length; - while (ap_get_brigade(origin->input_filters, bb, AP_MODE_BLOCKING) == APR_SUCCESS) { - if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(bb))) { - ap_pass_brigade(r->output_filters, bb); - break; - } - ap_pass_brigade(r->output_filters, bb); - apr_brigade_destroy(bb); - bb = apr_brigade_create(r->pool); - } - } - - apr_socket_close(sock); - return OK; -} |