minfrin at apache
May 9, 2008, 2:59 PM
Post #1 of 1
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svn commit: r654952 - in /httpd/httpd/trunk: CHANGES modules/filters/mod_request.c modules/filters/mod_request.h server/request.c
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Author: minfrin
Date: Fri May 9 14:59:02 2008
New Revision: 654952
URL: http://svn.apache.org/viewvc?rev=654952&view=rev
Log:
mod_request: Insert the KEPT_BODY filter via the insert_filter
hook instead of during fixups. Add a safety check to ensure the
filters cannot be inserted more than once. [Graham Leggett,
Ruediger Pluem]
Modified:
httpd/httpd/trunk/CHANGES
httpd/httpd/trunk/modules/filters/mod_request.c
httpd/httpd/trunk/modules/filters/mod_request.h
httpd/httpd/trunk/server/request.c
Modified: httpd/httpd/trunk/CHANGES
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/CHANGES?rev=654952&r1=654951&r2=654952&view=diff
==============================================================================
--- httpd/httpd/trunk/CHANGES [utf-8] (original)
+++ httpd/httpd/trunk/CHANGES [utf-8] Fri May 9 14:59:02 2008
@@ -2,6 +2,11 @@
Changes with Apache 2.3.0
[ When backported to 2.2.x, remove entry from this file ]
+ *) mod_request: Insert the KEPT_BODY filter via the insert_filter
+ hook instead of during fixups. Add a safety check to ensure the
+ filters cannot be inserted more than once. [Graham Leggett,
+ Rüdiger Pluem]
+
*) core: Do not allow Options ALL if not all options are allowed to be
overwritten. PR 44262 [Michał Grzędzicki <lazy iq.pl>]
Modified: httpd/httpd/trunk/modules/filters/mod_request.c
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/filters/mod_request.c?rev=654952&r1=654951&r2=654952&view=diff
==============================================================================
--- httpd/httpd/trunk/modules/filters/mod_request.c (original)
+++ httpd/httpd/trunk/modules/filters/mod_request.c Fri May 9 14:59:02 2008
@@ -185,7 +185,7 @@
if (kept_body) {
apr_table_unset(r->headers_in, "Transfer-Encoding");
apr_brigade_length(kept_body, 1, &length);
- apr_table_set(r->headers_in, "Content-Length", apr_off_t_toa(r->pool, length));
+ apr_table_setn(r->headers_in, "Content-Length", apr_off_t_toa(r->pool, length));
}
return OK;
@@ -307,13 +307,11 @@
* NOTE: File upload is not yet supported, but can be without change
* to the function call.
*/
-AP_DECLARE(int) ap_parse_request_form(request_rec * r, apr_array_header_t ** ptr,
+AP_DECLARE(int) ap_parse_request_form(request_rec * r, ap_filter_t * f,
+ apr_array_header_t ** ptr,
apr_size_t num, apr_size_t size)
{
- request_dir_conf *dconf;
- apr_off_t left = 0;
- apr_bucket_brigade *bb = NULL, *kept_body = NULL;
- apr_bucket *e;
+ apr_bucket_brigade *bb = NULL;
int seen_eos = 0;
char buffer[HUGE_STRING_LEN + 1];
const char *ct;
@@ -333,18 +331,15 @@
return ap_discard_request_body(r);
}
- dconf = ap_get_module_config(r->per_dir_config,
- &request_module);
- if (dconf->keep_body > 0) {
- left = dconf->keep_body;
- kept_body = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+ if (!f) {
+ f = r->input_filters;
}
bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
do {
apr_bucket *bucket = NULL, *last = NULL;
- int rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES,
+ int rv = ap_get_brigade(f, bb, AP_MODE_READBYTES,
APR_BLOCK_READ, HUGE_STRING_LEN);
if (rv != APR_SUCCESS) {
apr_brigade_destroy(bb);
@@ -460,24 +455,6 @@
}
}
- /* If we have been asked to, keep the data up until the
- * configured limit. If the limit is exceeded, we return an
- * HTTP_REQUEST_ENTITY_TOO_LARGE response so the caller is
- * clear the server couldn't handle their request.
- */
- if (kept_body) {
- if (len <= left) {
- apr_bucket_copy(bucket, &e);
- APR_BRIGADE_INSERT_TAIL(kept_body, e);
- left -= len;
- }
- else {
- apr_brigade_destroy(bb);
- apr_brigade_destroy(kept_body);
- return HTTP_REQUEST_ENTITY_TOO_LARGE;
- }
- }
-
}
apr_brigade_cleanup(bb);
@@ -492,34 +469,69 @@
APR_BRIGADE_INSERT_TAIL(pair->value, b);
}
- if (kept_body) {
- r->kept_body = kept_body;
- }
-
return OK;
}
/**
- * Fixups hook.
+ * Check whether this filter is not already present.
+ */
+static int request_is_filter_present(request_rec * r, ap_filter_rec_t *fn)
+{
+ ap_filter_t * f = r->input_filters;
+ while (f) {
+ if (f->frec == fn) {
+ return 1;
+ }
+ f = f->next;
+ }
+ return 0;
+}
+
+/**
+ * Insert filter hook.
*
* Add the KEEP_BODY filter to the request, if the admin wants to keep
* the body using the KeptBodySize directive.
*
+ * As a precaution, any pre-existing instances of either the kept_body or
+ * keep_body filters will be removed before the filter is added.
+ *
* @param r The request
*/
-static int request_fixups(request_rec * r)
+AP_DECLARE(void) ap_request_insert_filter(request_rec * r)
{
request_dir_conf *conf = ap_get_module_config(r->per_dir_config,
&request_module);
- if (conf->keep_body) {
- ap_add_input_filter_handle(ap_keep_body_input_filter_handle,
- NULL, r, r->connection);
+ if (r->kept_body) {
+ if (!request_is_filter_present(r, ap_kept_body_input_filter_handle)) {
+ ap_add_input_filter_handle(ap_kept_body_input_filter_handle,
+ NULL, r, r->connection);
+ }
+ }
+ else if (conf->keep_body) {
+ if (!request_is_filter_present(r, ap_kept_body_input_filter_handle)) {
+ ap_add_input_filter_handle(ap_keep_body_input_filter_handle,
+ NULL, r, r->connection);
+ }
}
- return OK;
+}
+/**
+ * Remove the kept_body and keep body filters from this specific request.
+ */
+AP_DECLARE(void) ap_request_remove_filter(request_rec * r)
+{
+ ap_filter_t * f = r->input_filters;
+ while (f) {
+ if (f->frec->filter_func.in_func == ap_kept_body_filter ||
+ f->frec->filter_func.in_func == ap_keep_body_filter) {
+ ap_remove_input_filter(f);
+ }
+ f = f->next;
+ }
}
static void *create_request_dir_config(apr_pool_t *p, char *dummy)
@@ -573,8 +585,10 @@
ap_kept_body_input_filter_handle =
ap_register_input_filter(KEPT_BODY_FILTER, ap_kept_body_filter,
kept_body_filter_init, AP_FTYPE_RESOURCE);
- ap_hook_fixups(request_fixups, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_insert_filter(ap_request_insert_filter, NULL, NULL, APR_HOOK_LAST);
APR_REGISTER_OPTIONAL_FN(ap_parse_request_form);
+ APR_REGISTER_OPTIONAL_FN(ap_request_insert_filter);
+ APR_REGISTER_OPTIONAL_FN(ap_request_remove_filter);
}
module AP_MODULE_DECLARE_DATA request_module = {
Modified: httpd/httpd/trunk/modules/filters/mod_request.h
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/filters/mod_request.h?rev=654952&r1=654951&r2=654952&view=diff
==============================================================================
--- httpd/httpd/trunk/modules/filters/mod_request.h (original)
+++ httpd/httpd/trunk/modules/filters/mod_request.h Fri May 9 14:59:02 2008
@@ -66,6 +66,12 @@
ap_input_mode_t mode, apr_read_type_e block,
apr_off_t readbytes);
+/* Optional function to add either the keep body filter or kept body filter as appropriate */
+AP_DECLARE(void) ap_request_insert_filter(request_rec * r);
+
+/* Optional function to remove either the keep body filter or kept body filter as appropriate */
+AP_DECLARE(void) ap_request_remove_filter(request_rec * r);
+
/**
* Structure to store the contents of an HTTP form of the type
* application/x-www-form-urlencoded.
@@ -111,15 +117,21 @@
* NOTE: File upload is not yet supported, but can be without change
* to the function call.
*/
-AP_DECLARE(int) ap_parse_request_form(request_rec * r, apr_array_header_t ** ptr,
+AP_DECLARE(int) ap_parse_request_form(request_rec * r, ap_filter_t * f,
+ apr_array_header_t ** ptr,
apr_size_t num, apr_size_t size);
-APR_DECLARE_OPTIONAL_FN(int, ap_parse_request_form, (request_rec * r, apr_array_header_t ** ptr,
+APR_DECLARE_OPTIONAL_FN(int, ap_parse_request_form, (request_rec * r, ap_filter_t * f,
+ apr_array_header_t ** ptr,
apr_size_t num, apr_size_t size));
+APR_DECLARE_OPTIONAL_FN(void, ap_request_insert_filter, (request_rec * r));
+
+APR_DECLARE_OPTIONAL_FN(void, ap_request_remove_filter, (request_rec * r));
+
#ifdef __cplusplus
}
#endif
-#endif /* !MOD_REQUEST_H */
+#endif /* !MOD_REQUEST_H */
/** @} */
Modified: httpd/httpd/trunk/server/request.c
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/server/request.c?rev=654952&r1=654951&r2=654952&view=diff
==============================================================================
--- httpd/httpd/trunk/server/request.c (original)
+++ httpd/httpd/trunk/server/request.c Fri May 9 14:59:02 2008
@@ -1645,13 +1645,6 @@
/* Pass on the kept body (if any) into the new request. */
rnew->kept_body = r->kept_body;
- /*
- * Add the KEPT_BODY filter, which will insert any body marked to be
- * kept for the use of a subrequest, into the subrequest.
- */
- ap_add_input_filter(KEPT_BODY_FILTER,
- NULL, rnew, rnew->connection);
-
return rnew;
}
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