| /* Copyright 1999-2004 The Apache Software Foundation |
| * |
| * 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. |
| */ |
| |
| #include "apr_strings.h" |
| #include "ap_config.h" |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_protocol.h" |
| #include "http_log.h" |
| #include "util_script.h" |
| #include "http_main.h" |
| #include "http_request.h" |
| |
| #include "mod_core.h" |
| |
| #define ASIS_MAGIC_TYPE "httpd/send-as-is" |
| |
| static int asis_handler(request_rec *r) |
| { |
| conn_rec *c = r->connection; |
| apr_file_t *f = NULL; |
| apr_status_t rv; |
| const char *location; |
| |
| if(strcmp(r->handler,ASIS_MAGIC_TYPE) && strcmp(r->handler,"send-as-is")) |
| return DECLINED; |
| |
| r->allowed |= (AP_METHOD_BIT << M_GET); |
| if (r->method_number != M_GET) |
| return DECLINED; |
| if (r->finfo.filetype == 0) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, |
| "File does not exist: %s", r->filename); |
| return HTTP_NOT_FOUND; |
| } |
| |
| if ((rv = apr_file_open(&f, r->filename, APR_READ, |
| APR_OS_DEFAULT, r->pool)) != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, |
| "file permissions deny server access: %s", r->filename); |
| return HTTP_FORBIDDEN; |
| } |
| |
| ap_scan_script_header_err(r, f, NULL); |
| location = apr_table_get(r->headers_out, "Location"); |
| |
| if (location && location[0] == '/' && |
| ((r->status == HTTP_OK) || ap_is_HTTP_REDIRECT(r->status))) { |
| |
| apr_file_close(f); |
| |
| /* Internal redirect -- fake-up a pseudo-request */ |
| r->status = HTTP_OK; |
| |
| /* This redirect needs to be a GET no matter what the original |
| * method was. |
| */ |
| r->method = apr_pstrdup(r->pool, "GET"); |
| r->method_number = M_GET; |
| |
| ap_internal_redirect_handler(location, r); |
| return OK; |
| } |
| |
| if (!r->header_only) { |
| apr_bucket_brigade *bb; |
| apr_bucket *b; |
| apr_off_t pos = 0; |
| |
| rv = apr_file_seek(f, APR_CUR, &pos); |
| if (rv != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, |
| "mod_asis: failed to find end-of-headers position " |
| "for %s", r->filename); |
| apr_file_close(f); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| bb = apr_brigade_create(r->pool, c->bucket_alloc); |
| #if APR_HAS_LARGE_FILES |
| if (r->finfo.size - pos > AP_MAX_SENDFILE) { |
| /* APR_HAS_LARGE_FILES issue; must split into mutiple buckets, |
| * no greater than MAX(apr_size_t), and more granular than that |
| * in case the brigade code/filters attempt to read it directly. |
| */ |
| apr_off_t fsize = r->finfo.size - pos; |
| b = apr_bucket_file_create(f, pos, AP_MAX_SENDFILE, |
| r->pool, c->bucket_alloc); |
| while (fsize > AP_MAX_SENDFILE) { |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| apr_bucket_copy(b, &b); |
| b->start += AP_MAX_SENDFILE; |
| fsize -= AP_MAX_SENDFILE; |
| } |
| b->length = (apr_size_t)fsize; /* Resize just the last bucket */ |
| } |
| else |
| #endif |
| b = apr_bucket_file_create(f, pos, (apr_size_t) (r->finfo.size - pos), |
| r->pool, c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| b = apr_bucket_eos_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| rv = ap_pass_brigade(r->output_filters, bb); |
| if (rv != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, |
| "mod_asis: ap_pass_brigade failed for file %s", r->filename); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| } |
| else { |
| apr_file_close(f); |
| } |
| |
| return OK; |
| } |
| |
| static void register_hooks(apr_pool_t *p) |
| { |
| ap_hook_handler(asis_handler,NULL,NULL,APR_HOOK_MIDDLE); |
| } |
| |
| module AP_MODULE_DECLARE_DATA asis_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 */ |
| register_hooks /* register hooks */ |
| }; |