| /* 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. |
| */ |
| |
| /* HTTP routines for Apache proxy */ |
| |
| #include "mod_proxy.h" |
| #include "ap_regex.h" |
| |
| module AP_MODULE_DECLARE_DATA proxy_http_module; |
| |
| static apr_status_t ap_proxy_http_cleanup(const char *scheme, |
| request_rec *r, |
| 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. |
| */ |
| static int proxy_http_canon(request_rec *r, char *url) |
| { |
| char *host, *path, sport[7]; |
| char *search = NULL; |
| 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: |
| * process the path. |
| * |
| * In a reverse proxy, our URL has been processed, so canonicalise |
| * unless proxy-nocanon is set to say it's raw |
| * In a forward proxy, we have and MUST NOT MANGLE the original. |
| */ |
| switch (r->proxyreq) { |
| default: /* wtf are we doing here? */ |
| case PROXYREQ_REVERSE: |
| 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; |
| } |
| break; |
| case PROXYREQ_PROXY: |
| path = url; |
| break; |
| } |
| |
| 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; |
| } |
| |
| /* 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 ap_regex_t *warn_rx; |
| static int clean_warning_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; |
| char *warning; |
| char *date; |
| apr_time_t warn_time; |
| const int nmatch = 3; |
| ap_regmatch_t pmatch[3]; |
| |
| if (headers == NULL) { |
| ((header_dptr*)data)->table = headers = apr_table_make(pool, 2); |
| } |
| /* |
| * Parse this, suckers! |
| * |
| * Warning = "Warning" ":" 1#warning-value |
| * |
| * warning-value = warn-code SP warn-agent SP warn-text |
| * [SP warn-date] |
| * |
| * warn-code = 3DIGIT |
| * warn-agent = ( host [ ":" port ] ) | pseudonym |
| * ; the name or pseudonym of the server adding |
| * ; the Warning header, for use in debugging |
| * warn-text = quoted-string |
| * warn-date = <"> HTTP-date <"> |
| * |
| * Buggrit, use a bloomin' regexp! |
| * (\d{3}\s+\S+\s+\".*?\"(\s+\"(.*?)\")?) --> whole in $1, date in $3 |
| */ |
| while (!ap_regexec(warn_rx, val, nmatch, pmatch, 0)) { |
| warning = apr_pstrndup(pool, val+pmatch[0].rm_so, |
| pmatch[0].rm_eo - pmatch[0].rm_so); |
| warn_time = 0; |
| if (pmatch[2].rm_eo > pmatch[2].rm_so) { |
| /* OK, we have a date here */ |
| date = apr_pstrndup(pool, val+pmatch[2].rm_so, |
| pmatch[2].rm_eo - pmatch[2].rm_so); |
| warn_time = apr_date_parse_http(date); |
| } |
| if (!warn_time || (warn_time == ((header_dptr*)data)->time)) { |
| apr_table_addn(headers, key, warning); |
| } |
| val += pmatch[0].rm_eo; |
| } |
| return 1; |
| } |
| static apr_table_t *ap_proxy_clean_warnings(apr_pool_t *p, apr_table_t *headers) |
| { |
| header_dptr x; |
| x.pool = p; |
| x.table = NULL; |
| x.time = apr_date_parse_http(apr_table_get(headers, "Date")); |
| apr_table_do(clean_warning_headers, &x, headers, "Warning", NULL); |
| if (x.table != NULL) { |
| apr_table_unset(headers, "Warning"); |
| return apr_table_overlay(p, headers, x.table); |
| } |
| else { |
| return headers; |
| } |
| } |
| 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 ap_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"); |
| } |
| 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 int pass_brigade(apr_bucket_alloc_t *bucket_alloc, |
| request_rec *r, proxy_conn_rec *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) |
| 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)", |
| conn->addr, conn->hostname); |
| if (origin->aborted) { |
| return APR_STATUS_IS_TIMEUP(status) ? HTTP_GATEWAY_TIME_OUT : HTTP_BAD_GATEWAY; |
| } |
| else { |
| return HTTP_BAD_REQUEST; |
| } |
| } |
| apr_brigade_cleanup(bb); |
| return OK; |
| } |
| |
| #define MAX_MEM_SPOOL 16384 |
| |
| static int stream_reqbody_chunked(apr_pool_t *p, |
| request_rec *r, |
| proxy_conn_rec *p_conn, |
| conn_rec *origin, |
| apr_bucket_brigade *header_brigade, |
| apr_bucket_brigade *input_brigade) |
| { |
| int seen_eos = 0, rv = OK; |
| 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 *bb; |
| apr_bucket *e; |
| |
| add_te_chunked(p, bucket_alloc, header_brigade); |
| terminate_headers(bucket_alloc, header_brigade); |
| |
| while (!APR_BUCKET_IS_EOS(APR_BRIGADE_FIRST(input_brigade))) |
| { |
| char chunk_hdr[20]; /* must be here due to transient bucket. */ |
| |
| /* If this brigade contains EOS, either stop or remove it. */ |
| if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(input_brigade))) { |
| seen_eos = 1; |
| |
| /* 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 |
| */ |
| bb = header_brigade; |
| |
| /* |
| * Save input_brigade in bb brigade. (At least) in the SSL case |
| * input_brigade contains transient buckets whose data would get |
| * overwritten during the next call of ap_get_brigade in the loop. |
| * ap_save_brigade ensures these buckets to be set aside. |
| * Calling ap_save_brigade with NULL as filter is OK, because |
| * bb brigade already has been created and does not need to get |
| * created by ap_save_brigade. |
| */ |
| status = ap_save_brigade(NULL, &bb, &input_brigade, p); |
| if (status != APR_SUCCESS) { |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| header_brigade = NULL; |
| } |
| else { |
| bb = input_brigade; |
| } |
| |
| /* The request is flushed below this loop with chunk EOS header */ |
| rv = pass_brigade(bucket_alloc, r, p_conn, origin, bb, 0); |
| if (rv != OK) { |
| return rv; |
| } |
| |
| if (seen_eos) { |
| break; |
| } |
| |
| status = ap_get_brigade(r->input_filters, input_brigade, |
| AP_MODE_READBYTES, APR_BLOCK_READ, |
| HUGE_STRING_LEN); |
| |
| if (status != APR_SUCCESS) { |
| return HTTP_BAD_REQUEST; |
| } |
| } |
| |
| if (header_brigade) { |
| /* we never sent the header brigade because there was no request body; |
| * send it now |
| */ |
| bb = 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); |
| } |
| bb = input_brigade; |
| } |
| |
| e = apr_bucket_immortal_create(ASCII_ZERO ASCII_CRLF |
| /* <trailers> */ |
| ASCII_CRLF, |
| 5, bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, e); |
| |
| /* Now we have headers-only, or the chunk EOS mark; flush it */ |
| rv = pass_brigade(bucket_alloc, r, p_conn, origin, bb, 1); |
| return rv; |
| } |
| |
| static int stream_reqbody_cl(apr_pool_t *p, |
| request_rec *r, |
| proxy_conn_rec *p_conn, |
| conn_rec *origin, |
| apr_bucket_brigade *header_brigade, |
| apr_bucket_brigade *input_brigade, |
| const char *old_cl_val) |
| { |
| int seen_eos = 0, rv = 0; |
| apr_status_t status = APR_SUCCESS; |
| apr_bucket_alloc_t *bucket_alloc = r->connection->bucket_alloc; |
| apr_bucket_brigade *bb; |
| apr_bucket *e; |
| apr_off_t cl_val = 0; |
| apr_off_t bytes; |
| apr_off_t bytes_streamed = 0; |
| |
| if (old_cl_val) { |
| add_cl(p, bucket_alloc, header_brigade, old_cl_val); |
| if (APR_SUCCESS != (status = apr_strtoff(&cl_val, old_cl_val, NULL, |
| 0))) { |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| } |
| terminate_headers(bucket_alloc, header_brigade); |
| |
| while (!APR_BUCKET_IS_EOS(APR_BRIGADE_FIRST(input_brigade))) |
| { |
| apr_brigade_length(input_brigade, 1, &bytes); |
| bytes_streamed += bytes; |
| |
| /* If this brigade contains EOS, either stop or remove it. */ |
| if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(input_brigade))) { |
| seen_eos = 1; |
| |
| /* We can't pass this EOS to the output_filters. */ |
| e = APR_BRIGADE_LAST(input_brigade); |
| apr_bucket_delete(e); |
| } |
| |
| /* C-L < bytes streamed?!? |
| * We will error out after the body is completely |
| * consumed, but we can't stream more bytes at the |
| * back end since they would in part be interpreted |
| * as another request! If nothing is sent, then |
| * just send nothing. |
| * |
| * Prevents HTTP Response Splitting. |
| */ |
| if (bytes_streamed > cl_val) |
| continue; |
| |
| if (header_brigade) { |
| /* we never sent the header brigade, so go ahead and |
| * take care of that now |
| */ |
| bb = header_brigade; |
| |
| /* |
| * Save input_brigade in bb brigade. (At least) in the SSL case |
| * input_brigade contains transient buckets whose data would get |
| * overwritten during the next call of ap_get_brigade in the loop. |
| * ap_save_brigade ensures these buckets to be set aside. |
| * Calling ap_save_brigade with NULL as filter is OK, because |
| * bb brigade already has been created and does not need to get |
| * created by ap_save_brigade. |
| */ |
| status = ap_save_brigade(NULL, &bb, &input_brigade, p); |
| if (status != APR_SUCCESS) { |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| header_brigade = NULL; |
| } |
| else { |
| bb = input_brigade; |
| } |
| |
| /* Once we hit EOS, we are ready to flush. */ |
| rv = pass_brigade(bucket_alloc, r, p_conn, origin, bb, seen_eos); |
| if (rv != OK) { |
| return rv ; |
| } |
| |
| if (seen_eos) { |
| break; |
| } |
| |
| status = ap_get_brigade(r->input_filters, input_brigade, |
| AP_MODE_READBYTES, APR_BLOCK_READ, |
| HUGE_STRING_LEN); |
| |
| if (status != APR_SUCCESS) { |
| return HTTP_BAD_REQUEST; |
| } |
| } |
| |
| if (bytes_streamed != cl_val) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server, |
| "proxy: client %s given Content-Length did not match" |
| " number of body bytes read", r->connection->remote_ip); |
| return HTTP_BAD_REQUEST; |
| } |
| |
| if (header_brigade) { |
| /* we never sent the header brigade since there was no request |
| * body; send it now with the flush flag |
| */ |
| bb = header_brigade; |
| return(pass_brigade(bucket_alloc, r, p_conn, origin, bb, 1)); |
| } |
| |
| return OK; |
| } |
| |
| static int spool_reqbody_cl(apr_pool_t *p, |
| request_rec *r, |
| proxy_conn_rec *p_conn, |
| conn_rec *origin, |
| apr_bucket_brigade *header_brigade, |
| apr_bucket_brigade *input_brigade, |
| int force_cl) |
| { |
| int seen_eos = 0; |
| apr_status_t status; |
| apr_bucket_alloc_t *bucket_alloc = r->connection->bucket_alloc; |
| apr_bucket_brigade *body_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); |
| |
| while (!APR_BUCKET_IS_EOS(APR_BRIGADE_FIRST(input_brigade))) |
| { |
| /* If this brigade contains EOS, either stop or remove it. */ |
| if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(input_brigade))) { |
| seen_eos = 1; |
| |
| /* 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 HTTP_INTERNAL_SERVER_ERROR; |
| } |
| 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 HTTP_INTERNAL_SERVER_ERROR; |
| } |
| } |
| 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 HTTP_INTERNAL_SERVER_ERROR; |
| } |
| AP_DEBUG_ASSERT(bytes_read == bytes_written); |
| fsize += bytes_written; |
| } |
| apr_brigade_cleanup(input_brigade); |
| } |
| else { |
| |
| /* |
| * Save input_brigade in body_brigade. (At least) in the SSL case |
| * input_brigade contains transient buckets whose data would get |
| * overwritten during the next call of ap_get_brigade in the loop. |
| * ap_save_brigade ensures these buckets to be set aside. |
| * Calling ap_save_brigade with NULL as filter is OK, because |
| * body_brigade already has been created and does not need to get |
| * created by ap_save_brigade. |
| */ |
| status = ap_save_brigade(NULL, &body_brigade, &input_brigade, p); |
| if (status != APR_SUCCESS) { |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| } |
| |
| bytes_spooled += bytes; |
| |
| if (seen_eos) { |
| break; |
| } |
| |
| status = ap_get_brigade(r->input_filters, input_brigade, |
| AP_MODE_READBYTES, APR_BLOCK_READ, |
| HUGE_STRING_LEN); |
| |
| if (status != APR_SUCCESS) { |
| return HTTP_BAD_REQUEST; |
| } |
| } |
| |
| if (bytes_spooled || force_cl) { |
| 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); |
| } |
| /* This is all a single brigade, pass with flush flagged */ |
| return(pass_brigade(bucket_alloc, r, p_conn, origin, header_brigade, 1)); |
| } |
| |
| static |
| int ap_proxy_http_request(apr_pool_t *p, request_rec *r, |
| proxy_conn_rec *p_conn, conn_rec *origin, |
| proxy_server_conf *conf, |
| apr_uri_t *uri, |
| char *url, char *server_portstr) |
| { |
| conn_rec *c = r->connection; |
| apr_bucket_alloc_t *bucket_alloc = c->bucket_alloc; |
| apr_bucket_brigade *header_brigade; |
| apr_bucket_brigade *input_brigade; |
| apr_bucket_brigade *temp_brigade; |
| apr_bucket *e; |
| char *buf; |
| const apr_array_header_t *headers_in_array; |
| const apr_table_entry_t *headers_in; |
| int counter; |
| apr_status_t status; |
| enum rb_methods {RB_INIT, RB_STREAM_CL, RB_STREAM_CHUNKED, RB_SPOOL_CL}; |
| enum rb_methods rb_method = RB_INIT; |
| const char *old_cl_val = NULL; |
| const char *old_te_val = NULL; |
| apr_off_t bytes_read = 0; |
| apr_off_t bytes; |
| int force10, rv; |
| apr_table_t *headers_in_copy; |
| |
| header_brigade = apr_brigade_create(p, origin->bucket_alloc); |
| |
| /* |
| * Send the HTTP/1.1 request to the remote server |
| */ |
| |
| 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; |
| p_conn->close++; |
| } else { |
| buf = apr_pstrcat(p, r->method, " ", url, " HTTP/1.1" CRLF, NULL); |
| force10 = 0; |
| } |
| if (apr_table_get(r->subprocess_env, "proxy-nokeepalive")) { |
| origin->keepalive = AP_CONN_CLOSE; |
| p_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(header_brigade, 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(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) |
| ); |
| } |
| |
| /* 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); |
| ap_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); |
| } |
| |
| /* We have headers, let's figure out our request body... */ |
| input_brigade = apr_brigade_create(p, bucket_alloc); |
| |
| /* sub-requests never use keepalives, and mustn't pass request bodies. |
| * Because the new logic looks at input_brigade, we will self-terminate |
| * input_brigade and jump past all of the request body logic... |
| * Reading anything with ap_get_brigade is likely to consume the |
| * main request's body or read beyond EOS - which would be unplesant. |
| */ |
| if (r->main) { |
| /* XXX: Why DON'T sub-requests use keepalives? */ |
| p_conn->close++; |
| if (old_cl_val) { |
| old_cl_val = NULL; |
| apr_table_unset(r->headers_in, "Content-Length"); |
| } |
| if (old_te_val) { |
| old_te_val = NULL; |
| apr_table_unset(r->headers_in, "Transfer-Encoding"); |
| } |
| rb_method = RB_STREAM_CL; |
| e = apr_bucket_eos_create(input_brigade->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(input_brigade, e); |
| goto skip_body; |
| } |
| |
| /* WE only understand chunked. Other modules might inject |
| * (and therefore, decode) other flavors but we don't know |
| * that the can and have done so unless they they remove |
| * their decoding from the headers_in T-E list. |
| * XXX: Make this extensible, but in doing so, presume the |
| * encoding has been done by the extensions' handler, and |
| * do not modify add_te_chunked's logic |
| */ |
| if (old_te_val && strcmp(old_te_val, "chunked") != 0) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server, |
| "proxy: %s Transfer-Encoding is not supported", |
| old_te_val); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| if (old_cl_val && old_te_val) { |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, APR_ENOTIMPL, r->server, |
| "proxy: client %s (%s) requested Transfer-Encoding " |
| "chunked body with Content-Length (C-L ignored)", |
| c->remote_ip, c->remote_host ? c->remote_host: ""); |
| apr_table_unset(r->headers_in, "Content-Length"); |
| old_cl_val = NULL; |
| origin->keepalive = AP_CONN_CLOSE; |
| p_conn->close++; |
| } |
| |
| /* Prefetch MAX_MEM_SPOOL bytes |
| * |
| * This helps us avoid any election of C-L v.s. T-E |
| * request bodies, since we are willing to keep in |
| * memory this much data, in any case. This gives |
| * us an instant C-L election if the body is of some |
| * reasonable size. |
| */ |
| temp_brigade = apr_brigade_create(p, bucket_alloc); |
| do { |
| status = ap_get_brigade(r->input_filters, temp_brigade, |
| AP_MODE_READBYTES, APR_BLOCK_READ, |
| MAX_MEM_SPOOL - bytes_read); |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server, |
| "proxy: prefetch request body failed to %pI (%s)" |
| " from %s (%s)", |
| p_conn->addr, p_conn->hostname ? p_conn->hostname: "", |
| c->remote_ip, c->remote_host ? c->remote_host: ""); |
| return HTTP_BAD_REQUEST; |
| } |
| |
| apr_brigade_length(temp_brigade, 1, &bytes); |
| bytes_read += bytes; |
| |
| /* |
| * Save temp_brigade in input_brigade. (At least) in the SSL case |
| * temp_brigade contains transient buckets whose data would get |
| * overwritten during the next call of ap_get_brigade in the loop. |
| * ap_save_brigade ensures these buckets to be set aside. |
| * Calling ap_save_brigade with NULL as filter is OK, because |
| * input_brigade already has been created and does not need to get |
| * created by ap_save_brigade. |
| */ |
| status = ap_save_brigade(NULL, &input_brigade, &temp_brigade, p); |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, status, r->server, |
| "proxy: processing prefetched request body failed" |
| " to %pI (%s) from %s (%s)", |
| p_conn->addr, p_conn->hostname ? p_conn->hostname: "", |
| c->remote_ip, c->remote_host ? c->remote_host: ""); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| /* Ensure we don't hit a wall where we have a buffer too small |
| * for ap_get_brigade's filters to fetch us another bucket, |
| * surrender once we hit 80 bytes less than MAX_MEM_SPOOL |
| * (an arbitrary value.) |
| */ |
| } while ((bytes_read < MAX_MEM_SPOOL - 80) |
| && !APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(input_brigade))); |
| |
| /* Use chunked request body encoding or send a content-length body? |
| * |
| * Prefer C-L when: |
| * |
| * We have no request body (handled by RB_STREAM_CL) |
| * |
| * We have a request body length <= MAX_MEM_SPOOL |
| * |
| * The administrator has setenv force-proxy-request-1.0 |
| * |
| * The client sent a C-L body, and the administrator has |
| * not setenv proxy-sendchunked or has set setenv proxy-sendcl |
| * |
| * The client sent a T-E body, and the administrator has |
| * setenv proxy-sendcl, and not setenv proxy-sendchunked |
| * |
| * If both proxy-sendcl and proxy-sendchunked are set, the |
| * behavior is the same as if neither were set, large bodies |
| * that can't be read will be forwarded in their original |
| * form of C-L, or T-E. |
| * |
| * To ensure maximum compatibility, setenv proxy-sendcl |
| * To reduce server resource use, setenv proxy-sendchunked |
| * |
| * Then address specific servers with conditional setenv |
| * options to restore the default behavior where desireable. |
| * |
| * 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. Chunked is always preferable. |
| * |
| * We can only trust the client-provided C-L if the T-E header |
| * is absent, and the filters are unchanged (the body won't |
| * be resized by another content filter). |
| */ |
| if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(input_brigade))) { |
| /* The whole thing fit, so our decision is trivial, use |
| * the filtered bytes read from the client for the request |
| * body Content-Length. |
| * |
| * If we expected no body, and read no body, do not set |
| * the Content-Length. |
| */ |
| if (old_cl_val || old_te_val || bytes_read) { |
| old_cl_val = apr_off_t_toa(r->pool, bytes_read); |
| } |
| rb_method = RB_STREAM_CL; |
| } |
| else if (old_te_val) { |
| if (force10 |
| || (apr_table_get(r->subprocess_env, "proxy-sendcl") |
| && !apr_table_get(r->subprocess_env, "proxy-sendchunks") |
| && !apr_table_get(r->subprocess_env, "proxy-sendchunked"))) { |
| rb_method = RB_SPOOL_CL; |
| } |
| else { |
| rb_method = RB_STREAM_CHUNKED; |
| } |
| } |
| else if (old_cl_val) { |
| if (r->input_filters == r->proto_input_filters) { |
| rb_method = RB_STREAM_CL; |
| } |
| else if (!force10 |
| && (apr_table_get(r->subprocess_env, "proxy-sendchunks") |
| || apr_table_get(r->subprocess_env, "proxy-sendchunked")) |
| && !apr_table_get(r->subprocess_env, "proxy-sendcl")) { |
| rb_method = RB_STREAM_CHUNKED; |
| } |
| else { |
| rb_method = RB_SPOOL_CL; |
| } |
| } |
| else { |
| /* This is an appropriate default; very efficient for no-body |
| * requests, and has the behavior that it will not add any C-L |
| * when the old_cl_val is NULL. |
| */ |
| rb_method = RB_SPOOL_CL; |
| } |
| |
| /* Yes I hate gotos. This is the subrequest shortcut */ |
| skip_body: |
| /* |
| * Handle Connection: header if we do HTTP/1.1 request: |
| * If we plan to close the backend connection sent Connection: close |
| * otherwise sent Connection: Keep-Alive. |
| */ |
| if (!force10) { |
| if (p_conn->close || p_conn->close_on_recycle) { |
| buf = apr_pstrdup(p, "Connection: close" CRLF); |
| } |
| else { |
| buf = apr_pstrdup(p, "Connection: Keep-Alive" CRLF); |
| } |
| 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); |
| } |
| |
| /* send the request body, if any. */ |
| switch(rb_method) { |
| case RB_STREAM_CHUNKED: |
| rv = stream_reqbody_chunked(p, r, p_conn, origin, header_brigade, |
| input_brigade); |
| break; |
| case RB_STREAM_CL: |
| rv = stream_reqbody_cl(p, r, p_conn, origin, header_brigade, |
| input_brigade, old_cl_val); |
| break; |
| case RB_SPOOL_CL: |
| rv = spool_reqbody_cl(p, r, p_conn, origin, header_brigade, |
| input_brigade, (old_cl_val != NULL) |
| || (old_te_val != NULL) |
| || (bytes_read > 0)); |
| break; |
| default: |
| /* shouldn't be possible */ |
| rv = HTTP_INTERNAL_SERVER_ERROR ; |
| break; |
| } |
| |
| if (rv != OK) { |
| /* apr_errno value has been logged in lower level method */ |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server, |
| "proxy: pass request body failed to %pI (%s)" |
| " from %s (%s)", |
| p_conn->addr, |
| p_conn->hostname ? p_conn->hostname: "", |
| c->remote_ip, |
| c->remote_host ? c->remote_host: ""); |
| return rv; |
| } |
| |
| return OK; |
| } |
| |
| static void process_proxy_header(request_rec* r, proxy_dir_conf* c, |
| const char* key, const char* value) |
| { |
| static const char* date_hdrs[] |
| = { "Date", "Expires", "Last-Modified", NULL } ; |
| static const struct { |
| const char* name; |
| ap_proxy_header_reverse_map_fn func; |
| } transform_hdrs[] = { |
| { "Location", ap_proxy_location_reverse_map } , |
| { "Content-Location", ap_proxy_location_reverse_map } , |
| { "URI", ap_proxy_location_reverse_map } , |
| { "Destination", ap_proxy_location_reverse_map } , |
| { "Set-Cookie", ap_proxy_cookie_reverse_map } , |
| { NULL, NULL } |
| } ; |
| int i ; |
| for ( i = 0 ; date_hdrs[i] ; ++i ) { |
| if ( !strcasecmp(date_hdrs[i], key) ) { |
| apr_table_add(r->headers_out, key, |
| ap_proxy_date_canon(r->pool, value)) ; |
| return ; |
| } |
| } |
| for ( i = 0 ; transform_hdrs[i].name ; ++i ) { |
| if ( !strcasecmp(transform_hdrs[i].name, key) ) { |
| apr_table_add(r->headers_out, key, |
| (*transform_hdrs[i].func)(r, c, value)) ; |
| return ; |
| } |
| } |
| apr_table_add(r->headers_out, key, value) ; |
| return ; |
| } |
| |
| /* |
| * Note: pread_len is the length of the response that we've mistakenly |
| * read (assuming that we don't consider that an error via |
| * ProxyBadHeader StartBody). This depends on buffer actually being |
| * local storage to the calling code in order for pread_len to make |
| * any sense at all, since we depend on buffer still containing |
| * what was read by ap_getline() upon return. |
| */ |
| static void ap_proxy_read_headers(request_rec *r, request_rec *rr, |
| char *buffer, int size, |
| conn_rec *c, int *pread_len) |
| { |
| int len; |
| char *value, *end; |
| char field[MAX_STRING_LEN]; |
| int saw_headers = 0; |
| void *sconf = r->server->module_config; |
| proxy_server_conf *psc; |
| proxy_dir_conf *dconf; |
| |
| dconf = ap_get_module_config(r->per_dir_config, &proxy_module); |
| psc = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); |
| |
| r->headers_out = apr_table_make(r->pool, 20); |
| *pread_len = 0; |
| |
| /* |
| * Read header lines until we get the empty separator line, a read error, |
| * the connection closes (EOF), or we timeout. |
| */ |
| while ((len = ap_getline(buffer, size, rr, 1)) > 0) { |
| |
| if (!(value = strchr(buffer, ':'))) { /* Find the colon separator */ |
| |
| /* We may encounter invalid headers, usually from buggy |
| * MS IIS servers, so we need to determine just how to handle |
| * them. We can either ignore them, assume that they mark the |
| * start-of-body (eg: a missing CRLF) or (the default) mark |
| * the headers as totally bogus and return a 500. The sole |
| * exception is an extra "HTTP/1.0 200, OK" line sprinkled |
| * in between the usual MIME headers, which is a favorite |
| * IIS bug. |
| */ |
| /* XXX: The mask check is buggy if we ever see an HTTP/1.10 */ |
| |
| if (!apr_date_checkmask(buffer, "HTTP/#.# ###*")) { |
| if (psc->badopt == bad_error) { |
| /* Nope, it wasn't even an extra HTTP header. Give up. */ |
| r->headers_out = NULL; |
| return ; |
| } |
| else if (psc->badopt == bad_body) { |
| /* if we've already started loading headers_out, then |
| * return what we've accumulated so far, in the hopes |
| * that they are useful; also note that we likely pre-read |
| * the first line of the response. |
| */ |
| if (saw_headers) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server, |
| "proxy: Starting body due to bogus non-header in headers " |
| "returned by %s (%s)", r->uri, r->method); |
| *pread_len = len; |
| return ; |
| } else { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server, |
| "proxy: No HTTP headers " |
| "returned by %s (%s)", r->uri, r->method); |
| return ; |
| } |
| } |
| } |
| /* this is the psc->badopt == bad_ignore case */ |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server, |
| "proxy: Ignoring bogus HTTP header " |
| "returned by %s (%s)", r->uri, r->method); |
| continue; |
| } |
| |
| *value = '\0'; |
| ++value; |
| /* XXX: RFC2068 defines only SP and HT as whitespace, this test is |
| * wrong... and so are many others probably. |
| */ |
| while (apr_isspace(*value)) |
| ++value; /* Skip to start of value */ |
| |
| /* should strip trailing whitespace as well */ |
| for (end = &value[strlen(value)-1]; end > value && apr_isspace(*end); -- |
| end) |
| *end = '\0'; |
| |
| /* make sure we add so as not to destroy duplicated headers |
| * Modify headers requiring canonicalisation and/or affected |
| * by ProxyPassReverse and family with process_proxy_header |
| */ |
| process_proxy_header(r, dconf, buffer, value) ; |
| saw_headers = 1; |
| |
| /* the header was too long; at the least we should skip extra data */ |
| if (len >= size - 1) { |
| while ((len = ap_getline(field, MAX_STRING_LEN, rr, 1)) |
| >= MAX_STRING_LEN - 1) { |
| /* soak up the extra data */ |
| } |
| if (len == 0) /* time to exit the larger loop as well */ |
| break; |
| } |
| } |
| } |
| |
| |
| |
| static int addit_dammit(void *v, const char *key, const char *val) |
| { |
| apr_table_addn(v, key, val); |
| return 1; |
| } |
| |
| static |
| apr_status_t ap_proxygetline(apr_bucket_brigade *bb, char *s, int n, request_rec *r, |
| int fold, int *writen) |
| { |
| char *tmp_s = s; |
| apr_status_t rv; |
| apr_size_t len; |
| |
| rv = ap_rgetline(&tmp_s, n, &len, r, fold, bb); |
| apr_brigade_cleanup(bb); |
| |
| if (rv == APR_SUCCESS) { |
| *writen = (int) len; |
| } else if (rv == APR_ENOSPC) { |
| *writen = n; |
| } else { |
| *writen = -1; |
| } |
| |
| return rv; |
| } |
| |
| /* |
| * Limit the number of interim respones we sent back to the client. Otherwise |
| * we suffer from a memory build up. Besides there is NO sense in sending back |
| * an unlimited number of interim responses to the client. Thus if we cross |
| * this limit send back a 502 (Bad Gateway). |
| */ |
| #ifndef AP_MAX_INTERIM_RESPONSES |
| #define AP_MAX_INTERIM_RESPONSES 10 |
| #endif |
| |
| static |
| apr_status_t ap_proxy_http_process_response(apr_pool_t * p, request_rec *r, |
| proxy_conn_rec *backend, |
| conn_rec *origin, |
| proxy_server_conf *conf, |
| char *server_portstr) { |
| conn_rec *c = r->connection; |
| char buffer[HUGE_STRING_LEN]; |
| const char *buf; |
| char keepchar; |
| request_rec *rp; |
| apr_bucket *e; |
| apr_bucket_brigade *bb, *tmp_bb; |
| int len, backasswards; |
| int interim_response = 0; /* non-zero whilst interim 1xx responses |
| * are being read. */ |
| int pread_len = 0; |
| apr_table_t *save_table; |
| int backend_broke = 0; |
| static const char *hop_by_hop_hdrs[] = |
| {"Keep-Alive", "Proxy-Authenticate", "TE", "Trailer", "Upgrade", NULL}; |
| int i; |
| const char *te = NULL; |
| |
| bb = apr_brigade_create(p, c->bucket_alloc); |
| |
| /* 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; |
| tmp_bb = apr_brigade_create(p, c->bucket_alloc); |
| do { |
| apr_status_t rc; |
| |
| apr_brigade_cleanup(bb); |
| |
| rc = ap_proxygetline(tmp_bb, buffer, sizeof(buffer), rp, 0, &len); |
| if (len == 0) { |
| /* handle one potential stray CRLF */ |
| rc = ap_proxygetline(tmp_bb, buffer, sizeof(buffer), rp, 0, &len); |
| } |
| if (len <= 0) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, |
| "proxy: error reading status line from remote " |
| "server %s", backend->hostname); |
| /* |
| * If we are a reverse proxy request shutdown the connection |
| * WITHOUT ANY response to trigger a retry by the client |
| * if allowed (as for idempotent requests). |
| * BUT currently we should not do this if the request is the |
| * first request on a keepalive connection as browsers like |
| * seamonkey only display an empty page in this case and do |
| * not do a retry. |
| */ |
| if (r->proxyreq == PROXYREQ_REVERSE && c->keepalives) { |
| apr_bucket *eos; |
| |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, |
| "proxy: Closing connection to client because" |
| " reading from backend server %s failed. Number" |
| " of keepalives %i", backend->hostname, |
| c->keepalives); |
| ap_proxy_backend_broke(r, bb); |
| /* |
| * Add an EOC bucket to signal the ap_http_header_filter |
| * that it should get out of our way, BUT ensure that the |
| * EOC bucket is inserted BEFORE an EOS bucket in bb as |
| * some resource filters like mod_deflate pass everything |
| * up to the EOS down the chain immediately and sent the |
| * remainder of the brigade later (or even never). But in |
| * this case the ap_http_header_filter does not get out of |
| * our way soon enough. |
| */ |
| e = ap_bucket_eoc_create(c->bucket_alloc); |
| eos = APR_BRIGADE_LAST(bb); |
| while ((APR_BRIGADE_SENTINEL(bb) != eos) |
| && !APR_BUCKET_IS_EOS(eos)) { |
| eos = APR_BUCKET_PREV(eos); |
| } |
| if (eos == APR_BRIGADE_SENTINEL(bb)) { |
| APR_BRIGADE_INSERT_TAIL(bb, e); |
| } |
| else { |
| APR_BUCKET_INSERT_BEFORE(eos, e); |
| } |
| ap_pass_brigade(r->output_filters, bb); |
| /* Need to return OK to avoid sending an error message */ |
| return OK; |
| } |
| else if (!c->keepalives) { |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, |
| "proxy: NOT Closing connection to client" |
| " although reading from backend server %s" |
| " failed.", backend->hostname); |
| } |
| return ap_proxyerror(r, HTTP_BAD_GATEWAY, |
| "Error reading from remote server"); |
| } |
| /* XXX: Is this a real headers length send from remote? */ |
| backend->worker->s->read += len; |
| |
| /* 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)) { |
| 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. */ |
| |
| /* First, tuck away all already existing cookies */ |
| save_table = apr_table_make(r->pool, 2); |
| apr_table_do(addit_dammit, save_table, r->headers_out, |
| "Set-Cookie", NULL); |
| |
| /* shove the headers direct into r->headers_out */ |
| ap_proxy_read_headers(r, rp, buffer, sizeof(buffer), origin, |
| &pread_len); |
| |
| 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); |
| backend->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; |
| } |
| |
| /* Now, add in the just read cookies */ |
| apr_table_do(addit_dammit, save_table, r->headers_out, |
| "Set-Cookie", NULL); |
| |
| /* and now load 'em all in */ |
| if (!apr_is_empty_table(save_table)) { |
| apr_table_unset(r->headers_out, "Set-Cookie"); |
| r->headers_out = apr_table_overlay(r->pool, |
| r->headers_out, |
| save_table); |
| } |
| |
| /* 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"; |
| * |
| * To help mitigate HTTP Splitting, unset Content-Length |
| * and shut down the backend server connection |
| * XXX: We aught to treat such a response as uncachable |
| */ |
| 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", backend->hostname); |
| backend->close += 1; |
| } |
| |
| /* |
| * Save a possible Transfer-Encoding header as we need it later for |
| * ap_http_filter to know where to end. |
| */ |
| te = apr_table_get(r->headers_out, "Transfer-Encoding"); |
| /* strip connection listed hop-by-hop headers from response */ |
| backend->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)); |
| } |
| if (!ap_is_HTTP_INFO(r->status)) { |
| ap_proxy_pre_http_request(origin, rp); |
| } |
| |
| /* Clear hop-by-hop headers */ |
| for (i=0; hop_by_hop_hdrs[i]; ++i) { |
| apr_table_unset(r->headers_out, hop_by_hop_hdrs[i]); |
| } |
| /* Delete warnings with wrong date */ |
| r->headers_out = ap_proxy_clean_warnings(p, r->headers_out); |
| |
| /* handle Via header in response */ |
| if (conf->viaopt != via_off && conf->viaopt != via_block) { |
| 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:" response header entry and merge it */ |
| apr_table_addn(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), |
| 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) |
| ); |
| } |
| |
| /* cancel keepalive if HTTP/1.0 or less */ |
| if ((major < 1) || (minor < 1)) { |
| backend->close += 1; |
| origin->keepalive = AP_CONN_CLOSE; |
| } |
| } else { |
| /* an http/0.9 response */ |
| backasswards = 1; |
| r->status = 200; |
| r->status_line = "200 OK"; |
| backend->close += 1; |
| } |
| |
| if (ap_is_HTTP_INFO(r->status)) { |
| interim_response++; |
| } |
| else { |
| interim_response = 0; |
| } |
| if (interim_response) { |
| /* RFC2616 tells us to forward this. |
| * |
| * OTOH, an interim response here may mean the backend |
| * is playing sillybuggers. The Client didn't ask for |
| * it within the defined HTTP/1.1 mechanisms, and if |
| * it's an extension, it may also be unsupported by us. |
| * |
| * There's also the possibility that changing existing |
| * behaviour here might break something. |
| * |
| * So let's make it configurable. |
| */ |
| const char *policy = apr_table_get(r->subprocess_env, |
| "proxy-interim-response"); |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, |
| "proxy: HTTP: received interim %d response", |
| r->status); |
| if (!policy || !strcasecmp(policy, "RFC")) { |
| ap_send_interim_response(r, 1); |
| } |
| /* FIXME: refine this to be able to specify per-response-status |
| * policies and maybe also add option to bail out with 502 |
| */ |
| else if (strcasecmp(policy, "Suppress")) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL, |
| "undefined proxy interim response policy"); |
| } |
| } |
| /* Moved the fixups of Date headers and those affected by |
| * ProxyPassReverse/etc from here to ap_proxy_read_headers |
| */ |
| |
| if ((r->status == 401) && (conf->error_override)) { |
| 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 or did we maybe preread the 1st line of |
| * the response? If so, load the extra data. These are 2 mutually |
| * exclusive possibilities, that just happen to require very |
| * similar behavior. |
| */ |
| if (backasswards || pread_len) { |
| apr_ssize_t cntr = (apr_ssize_t)pread_len; |
| if (backasswards) { |
| /*@@@FIXME: |
| * At this point in response processing of a 0.9 response, |
| * we don't know yet whether data is binary or not. |
| * mod_charset_lite will get control later on, so it cannot |
| * decide on the conversion of this buffer full of data. |
| * However, chances are that we are not really talking to an |
| * HTTP/0.9 server, but to some different protocol, therefore |
| * the best guess IMHO is to always treat the buffer as "text/x": |
| */ |
| ap_xlate_proto_to_ascii(buffer, len); |
| cntr = (apr_ssize_t)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 */ |
| !interim_response && /* not any 1xx response */ |
| (r->status != HTTP_NO_CONTENT) && /* not 204 */ |
| (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); |
| /* |
| * Restore Transfer-Encoding header from response if we saved |
| * one before and there is none left. We need it for the |
| * ap_http_filter. See above. |
| */ |
| if (te && !apr_table_get(rp->headers_in, "Transfer-Encoding")) { |
| apr_table_add(rp->headers_in, "Transfer-Encoding", te); |
| } |
| |
| 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 || !ap_is_HTTP_ERROR(r->status)) { |
| /* read the body, pass it to the output filters */ |
| apr_read_type_e mode = APR_NONBLOCK_READ; |
| int finish = FALSE; |
| |
| do { |
| apr_off_t readbytes; |
| apr_status_t rv; |
| |
| rv = ap_get_brigade(rp->input_filters, bb, |
| AP_MODE_READBYTES, mode, |
| conf->io_buffer_size); |
| |
| /* ap_get_brigade will return success with an empty brigade |
| * for a non-blocking read which would block: */ |
| if (APR_STATUS_IS_EAGAIN(rv) |
| || (rv == APR_SUCCESS && APR_BRIGADE_EMPTY(bb))) { |
| /* flush to the client and switch to blocking mode */ |
| e = apr_bucket_flush_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, e); |
| if (ap_pass_brigade(r->output_filters, bb) |
| || c->aborted) { |
| backend->close = 1; |
| break; |
| } |
| apr_brigade_cleanup(bb); |
| mode = APR_BLOCK_READ; |
| continue; |
| } |
| else if (rv == APR_EOF) { |
| break; |
| } |
| else if (rv != APR_SUCCESS) { |
| /* In this case, we are in real trouble because |
| * our backend bailed on us. Pass along a 502 error |
| * error bucket |
| */ |
| ap_log_cerror(APLOG_MARK, APLOG_ERR, rv, c, |
| "proxy: error reading response"); |
| ap_proxy_backend_broke(r, bb); |
| ap_pass_brigade(r->output_filters, bb); |
| backend_broke = 1; |
| backend->close = 1; |
| break; |
| } |
| /* next time try a non-blocking read */ |
| mode = APR_NONBLOCK_READ; |
| |
| apr_brigade_length(bb, 0, &readbytes); |
| backend->worker->s->read += readbytes; |
| #if DEBUGGING |
| { |
| 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))) { |
| /* 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! */ |
| backend->close = 1; /* this causes socket close below */ |
| finish = TRUE; |
| } |
| |
| /* make sure we always clean up after ourselves */ |
| apr_brigade_cleanup(bb); |
| |
| } while (!finish); |
| } |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: end body send"); |
| } |
| else if (!interim_response) { |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: header only"); |
| |
| /* Pass EOS bucket down the filter chain. */ |
| e = apr_bucket_eos_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, e); |
| if (ap_pass_brigade(r->output_filters, bb) != APR_SUCCESS |
| || c->aborted) { |
| /* Ack! Phbtt! Die! User aborted! */ |
| backend->close = 1; /* this causes socket close below */ |
| } |
| |
| apr_brigade_cleanup(bb); |
| } |
| } while (interim_response && (interim_response < AP_MAX_INTERIM_RESPONSES)); |
| |
| /* See define of AP_MAX_INTERIM_RESPONSES for why */ |
| if (interim_response >= AP_MAX_INTERIM_RESPONSES) { |
| return ap_proxyerror(r, HTTP_BAD_GATEWAY, |
| apr_psprintf(p, |
| "Too many (%d) interim responses from origin server", |
| interim_response)); |
| } |
| |
| /* If our connection with the client is to be aborted, return DONE. */ |
| if (c->aborted || backend_broke) { |
| return DONE; |
| } |
| |
| if (conf->error_override) { |
| /* the code above this checks for 'OK' which is what the hook expects */ |
| if (!ap_is_HTTP_ERROR(r->status)) |
| 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 (!r->header_only && /* not HEAD request */ |
| (status != HTTP_NO_CONTENT) && /* not 204 */ |
| (status != HTTP_NOT_MODIFIED)) { /* not 304 */ |
| ap_discard_request_body(rp); |
| } |
| return status; |
| } |
| } else |
| return OK; |
| } |
| |
| static |
| apr_status_t ap_proxy_http_cleanup(const char *scheme, request_rec *r, |
| proxy_conn_rec *backend) |
| { |
| ap_proxy_release_connection(scheme, backend, r->server); |
| 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.) |
| */ |
| static int proxy_http_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]; |
| char *scheme; |
| const char *proxy_function; |
| const char *u; |
| 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_uri_t *uri = apr_palloc(r->connection->pool, sizeof(*uri)); |
| |
| /* find the scheme */ |
| u = strchr(url, ':'); |
| if (u == NULL || u[1] != '/' || u[2] != '/' || u[3] == '\0') |
| return DECLINED; |
| if ((u - url) > 14) |
| return HTTP_BAD_REQUEST; |
| scheme = apr_pstrndup(c->pool, url, u - url); |
| /* scheme is lowercase */ |
| ap_str_tolower(scheme); |
| /* is it for us? */ |
| if (strcmp(scheme, "https") == 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; |
| proxy_function = "HTTPS"; |
| } |
| else if (!(strcmp(scheme, "http") == 0 || (strcmp(scheme, "ftp") == 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 */ |
| } |
| else { |
| if (*scheme == 'h') |
| proxy_function = "HTTP"; |
| else |
| proxy_function = "FTP"; |
| } |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, |
| "proxy: HTTP: serving URL %s", url); |
| |
| |
| /* create space for state information */ |
| if ((status = ap_proxy_acquire_connection(proxy_function, &backend, |
| worker, r->server)) != OK) |
| goto cleanup; |
| |
| |
| backend->is_ssl = is_ssl; |
| if (is_ssl) { |
| ap_proxy_ssl_connection_cleanup(backend, r); |
| } |
| |
| /* Step One: Determine Who To Connect To */ |
| if ((status = ap_proxy_determine_connection(p, r, conf, worker, backend, |
| uri, &url, proxyname, |
| proxyport, server_portstr, |
| sizeof(server_portstr))) != OK) |
| goto cleanup; |
| |
| /* Step Two: Make the Connection */ |
| if (ap_proxy_connect_backend(proxy_function, backend, worker, r->server)) { |
| if (r->proxyreq == PROXYREQ_PROXY) |
| status = HTTP_NOT_FOUND; |
| else |
| status = HTTP_SERVICE_UNAVAILABLE; |
| goto cleanup; |
| } |
| |
| /* Step Three: Create conn_rec */ |
| if (!backend->connection) { |
| if ((status = ap_proxy_connection_create(proxy_function, backend, |
| c, r->server)) != OK) |
| goto cleanup; |
| } |
| |
| /* Step Four: Send the Request */ |
| if ((status = ap_proxy_http_request(p, r, backend, backend->connection, |
| conf, uri, url, server_portstr)) != OK) |
| goto cleanup; |
| |
| /* Step Five: Receive the Response */ |
| if ((status = ap_proxy_http_process_response(p, r, backend, |
| backend->connection, |
| conf, server_portstr)) != OK) |
| goto cleanup; |
| |
| /* Step Six: Clean Up */ |
| |
| cleanup: |
| if (backend) { |
| if (status != OK) |
| backend->close = 1; |
| ap_proxy_http_cleanup(proxy_function, r, backend); |
| } |
| return status; |
| } |
| static apr_status_t warn_rx_free(void *p) |
| { |
| ap_pregfree((apr_pool_t*)p, warn_rx); |
| return APR_SUCCESS; |
| } |
| static void ap_proxy_http_register_hook(apr_pool_t *p) |
| { |
| proxy_hook_scheme_handler(proxy_http_handler, NULL, NULL, APR_HOOK_FIRST); |
| proxy_hook_canon_handler(proxy_http_canon, NULL, NULL, APR_HOOK_FIRST); |
| warn_rx = ap_pregcomp(p, "[0-9]{3}[ \t]+[^ \t]+[ \t]+\"[^\"]*\"([ \t]+\"([^\"]+)\")?", 0); |
| apr_pool_cleanup_register(p, p, warn_rx_free, apr_pool_cleanup_null); |
| } |
| |
| 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 */ |
| }; |
| |
