mod_asis.c revision bc8fd1b0b1afdf89b8d28eefa8cd74e26ba97986
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 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.
*/
#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)
{
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_NOERRNO|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);
#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);
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);
APR_BRIGADE_INSERT_TAIL(bb, b);
b = apr_bucket_eos_create();
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 */
};