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From ic...@apache.org
Subject svn commit: r1855737 - in /httpd/httpd/branches/2.4.x: CHANGES docs/manual/mod/core.xml include/ap_mmn.h include/http_core.h include/httpd.h server/core.c server/request.c server/util.c
Date Mon, 18 Mar 2019 08:49:59 GMT
Author: icing
Date: Mon Mar 18 08:49:59 2019
New Revision: 1855737

URL: http://svn.apache.org/viewvc?rev=1855737&view=rev
Log:
Merge of r1855705 from trunk:

core: merge consecutive slashes in the path


Modified:
    httpd/httpd/branches/2.4.x/CHANGES
    httpd/httpd/branches/2.4.x/docs/manual/mod/core.xml
    httpd/httpd/branches/2.4.x/include/ap_mmn.h
    httpd/httpd/branches/2.4.x/include/http_core.h
    httpd/httpd/branches/2.4.x/include/httpd.h
    httpd/httpd/branches/2.4.x/server/core.c
    httpd/httpd/branches/2.4.x/server/request.c
    httpd/httpd/branches/2.4.x/server/util.c

Modified: httpd/httpd/branches/2.4.x/CHANGES
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/CHANGES [utf-8] (original)
+++ httpd/httpd/branches/2.4.x/CHANGES [utf-8] Mon Mar 18 08:49:59 2019
@@ -1,6 +1,10 @@
                                                          -*- coding: utf-8 -*-
 Changes with Apache 2.4.39
 
+  *) core: new configuration option 'MergeSlashes on|off' that controls handling of
+     multiple, consecutive slash ('/') characters in the path component of the request URL.
+     [Eric Covener]
+     
   *) mod_http2: when SSL renegotiation is inhibited and a 403 ErrorDocument is
      in play, the proper HTTP/2 stream reset did not trigger with H2_ERR_HTTP_1_1_REQUIRED.
      Fixed. [Michael Kaufmann] 

Modified: httpd/httpd/branches/2.4.x/docs/manual/mod/core.xml
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/docs/manual/mod/core.xml?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/docs/manual/mod/core.xml (original)
+++ httpd/httpd/branches/2.4.x/docs/manual/mod/core.xml Mon Mar 18 08:49:59 2019
@@ -5138,4 +5138,30 @@ recognized methods to modules.</p>
 <seealso><directive module="mod_allowmethods">AllowMethods</directive></seealso>
 </directivesynopsis>
 
+<directivesynopsis>
+<name>MergeSlashes</name>
+<description>Controls whether the server merges consecutive slashes in URLs.
+</description>
+<syntax>MergeSlashes ON|OFF</syntax>
+<default>MergeSlashes ON</default>
+<contextlist><context>server config</context><context>virtual host</context>
+</contextlist>
+<compatibility>Added in 2.5.1</compatibility>
+
+<usage>
+    <p>By default, the server merges (or collapses) multiple consecutive slash
+    ('/') characters in the path component of the request URL.</p>
+
+    <p>When mapping URL's to the filesystem, these multiple slashes are not 
+    significant.  However, URL's handled other ways, such as by CGI or proxy,
+    might prefer to retain the significance of multiple consecutive slashes. 
+    In these cases <directive>MergeSlashes</directive> can be set to 
+    <em>OFF</em> to retain the multiple consecutive slashes.  In these
+    configurations, regular expressions used in the configuration file that match
+    the path component of the URL (<directive>LocationMatch</directive>,
+    <directive>RewriteRule</directive>, ...) need to take into account multiple

+    consecutive slashes.</p>
+</usage>
+</directivesynopsis>
+
 </modulesynopsis>

Modified: httpd/httpd/branches/2.4.x/include/ap_mmn.h
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/include/ap_mmn.h?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/include/ap_mmn.h (original)
+++ httpd/httpd/branches/2.4.x/include/ap_mmn.h Mon Mar 18 08:49:59 2019
@@ -523,6 +523,8 @@
  * 20120211.82 (2.4.35-dev) Add optional function declaration for
  *                          ap_proxy_balancer_get_best_worker to mod_proxy.h.
  * 20120211.83 (2.4.35-dev) Add client64 field to worker_score struct
+ * 20120211.84 (2.4.35-dev) Add ap_no2slash_ex() and merge_slashes to 
+ *                          core_server_conf.
  *
  */
 
@@ -531,7 +533,7 @@
 #ifndef MODULE_MAGIC_NUMBER_MAJOR
 #define MODULE_MAGIC_NUMBER_MAJOR 20120211
 #endif
-#define MODULE_MAGIC_NUMBER_MINOR 83                  /* 0...n */
+#define MODULE_MAGIC_NUMBER_MINOR 84                  /* 0...n */
 
 /**
  * Determine if the server's current MODULE_MAGIC_NUMBER is at least a

Modified: httpd/httpd/branches/2.4.x/include/http_core.h
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/include/http_core.h?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/include/http_core.h (original)
+++ httpd/httpd/branches/2.4.x/include/http_core.h Mon Mar 18 08:49:59 2019
@@ -740,7 +740,7 @@ typedef struct {
 #define AP_HTTP_METHODS_LENIENT       1
 #define AP_HTTP_METHODS_REGISTERED    2
     char http_methods;
-
+    unsigned int merge_slashes;
 } core_server_config;
 
 /* for AddOutputFiltersByType in core.c */

Modified: httpd/httpd/branches/2.4.x/include/httpd.h
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/include/httpd.h?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/include/httpd.h (original)
+++ httpd/httpd/branches/2.4.x/include/httpd.h Mon Mar 18 08:49:59 2019
@@ -1697,12 +1697,22 @@ AP_DECLARE(int) ap_unescape_url_keep2f(c
 AP_DECLARE(int) ap_unescape_urlencoded(char *query);
 
 /**
- * Convert all double slashes to single slashes
- * @param name The string to convert
+ * Convert all double slashes to single slashes, except where significant
+ * to the filesystem on the current platform.
+ * @param name The string to convert, assumed to be a filesystem path
  */
 AP_DECLARE(void) ap_no2slash(char *name);
 
 /**
+ * Convert all double slashes to single slashes, except where significant
+ * to the filesystem on the current platform.
+ * @param name The string to convert
+ * @param is_fs_path if set to 0, the significance of any double-slashes is 
+ *        ignored.
+ */
+AP_DECLARE(void) ap_no2slash_ex(char *name, int is_fs_path);
+
+/**
  * Remove all ./ and xx/../ substrings from a file name. Also remove
  * any leading ../ or /../ substrings.
  * @param name the file name to parse

Modified: httpd/httpd/branches/2.4.x/server/core.c
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/core.c?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/server/core.c (original)
+++ httpd/httpd/branches/2.4.x/server/core.c Mon Mar 18 08:49:59 2019
@@ -490,6 +490,7 @@ static void *create_core_server_config(a
 
     conf->protocols = apr_array_make(a, 5, sizeof(const char *));
     conf->protocols_honor_order = -1;
+    conf->merge_slashes = AP_CORE_CONFIG_UNSET; 
     
     return (void *)conf;
 }
@@ -555,6 +556,7 @@ static void *merge_core_server_configs(a
     conf->protocols_honor_order = ((virt->protocols_honor_order < 0)?
                                        base->protocols_honor_order :
                                        virt->protocols_honor_order);
+    AP_CORE_MERGE_FLAG(merge_slashes, conf, base, virt);
     
     return conf;
 }
@@ -1863,6 +1865,13 @@ static const char *set_qualify_redirect_
     return NULL;
 }
 
+static const char *set_core_server_flag(cmd_parms *cmd, void *s_, int flag)
+{
+    core_server_config *conf =
+        ap_get_core_module_config(cmd->server->module_config);
+    return ap_set_flag_slot(cmd, conf, flag);
+}
+
 static const char *set_override_list(cmd_parms *cmd, void *d_, int argc, char *const argv[])
 {
     core_dir_config *d = d_;
@@ -4562,6 +4571,10 @@ AP_INIT_ITERATE("HttpProtocolOptions", s
                 "'Unsafe' or 'Strict' (default). Sets HTTP acceptance rules"),
 AP_INIT_ITERATE("RegisterHttpMethod", set_http_method, NULL, RSRC_CONF,
                 "Registers non-standard HTTP methods"),
+AP_INIT_FLAG("MergeSlashes", set_core_server_flag, 
+             (void *)APR_OFFSETOF(core_server_config, merge_slashes),  
+             RSRC_CONF,
+             "Controls whether consecutive slashes in the URI path are merged"),
 { NULL }
 };
 

Modified: httpd/httpd/branches/2.4.x/server/request.c
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/request.c?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/server/request.c (original)
+++ httpd/httpd/branches/2.4.x/server/request.c Mon Mar 18 08:49:59 2019
@@ -167,6 +167,8 @@ AP_DECLARE(int) ap_process_request_inter
     int file_req = (r->main && r->filename);
     int access_status;
     core_dir_config *d;
+    core_server_config *sconf =
+        ap_get_core_module_config(r->server->module_config);
 
     /* Ignore embedded %2F's in path for proxy requests */
     if (!r->proxyreq && r->parsed_uri.path) {
@@ -191,6 +193,10 @@ AP_DECLARE(int) ap_process_request_inter
     }
 
     ap_getparents(r->uri);     /* OK --- shrinking transformations... */
+    if (sconf->merge_slashes != AP_CORE_CONFIG_OFF) { 
+        ap_no2slash(r->uri);
+        ap_no2slash(r->parsed_uri.path);
+     }
 
     /* All file subrequests are a huge pain... they cannot bubble through the
      * next several steps.  Only file subrequests are allowed an empty uri,
@@ -1411,20 +1417,7 @@ AP_DECLARE(int) ap_location_walk(request
 
     cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
     cached = (cache->cached != NULL);
-
-    /* Location and LocationMatch differ on their behaviour w.r.t. multiple
-     * slashes.  Location matches multiple slashes with a single slash,
-     * LocationMatch doesn't.  An exception, for backwards brokenness is
-     * absoluteURIs... in which case neither match multiple slashes.
-     */
-    if (r->uri[0] != '/') {
-        entry_uri = r->uri;
-    }
-    else {
-        char *uri = apr_pstrdup(r->pool, r->uri);
-        ap_no2slash(uri);
-        entry_uri = uri;
-    }
+    entry_uri = r->uri;
 
     /* If we have an cache->cached location that matches r->uri,
      * and the vhost's list of locations hasn't changed, we can skip
@@ -1491,7 +1484,7 @@ AP_DECLARE(int) ap_location_walk(request
                     pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t));
                 }
 
-                if (ap_regexec(entry_core->r, r->uri, nmatch, pmatch, 0)) {
+                if (ap_regexec(entry_core->r, entry_uri, nmatch, pmatch, 0)) {
                     continue;
                 }
 
@@ -1501,7 +1494,7 @@ AP_DECLARE(int) ap_location_walk(request
                         apr_table_setn(r->subprocess_env,
                                        ((const char **)entry_core->refs->elts)[i],
                                        apr_pstrndup(r->pool,
-                                       r->uri + pmatch[i].rm_so,
+                                       entry_uri + pmatch[i].rm_so,
                                        pmatch[i].rm_eo - pmatch[i].rm_so));
                     }
                 }

Modified: httpd/httpd/branches/2.4.x/server/util.c
URL: http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/server/util.c?rev=1855737&r1=1855736&r2=1855737&view=diff
==============================================================================
--- httpd/httpd/branches/2.4.x/server/util.c (original)
+++ httpd/httpd/branches/2.4.x/server/util.c Mon Mar 18 08:49:59 2019
@@ -561,16 +561,16 @@ AP_DECLARE(void) ap_getparents(char *nam
         name[l] = '\0';
     }
 }
-
-AP_DECLARE(void) ap_no2slash(char *name)
+AP_DECLARE(void) ap_no2slash_ex(char *name, int is_fs_path)
 {
+
     char *d, *s;
 
     s = d = name;
 
 #ifdef HAVE_UNC_PATHS
     /* Check for UNC names.  Leave leading two slashes. */
-    if (s[0] == '/' && s[1] == '/')
+    if (is_fs_path && s[0] == '/' && s[1] == '/')
         *d++ = *s++;
 #endif
 
@@ -587,6 +587,10 @@ AP_DECLARE(void) ap_no2slash(char *name)
     *d = '\0';
 }
 
+AP_DECLARE(void) ap_no2slash(char *name)
+{
+    ap_no2slash_ex(name, 1);
+}
 
 /*
  * copy at most n leading directories of s into d



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