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236 lines
9.8 KiB
236 lines
9.8 KiB
diff --git a/docs/manual/mod/core.html.en b/docs/manual/mod/core.html.en
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index 0a24bc8..20d1e5a 100644
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--- a/docs/manual/mod/core.html.en
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+++ b/docs/manual/mod/core.html.en
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@@ -97,6 +97,7 @@ available</td></tr>
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<li><img alt="" src="../images/down.gif" /> <a href="#maxrangeoverlaps">MaxRangeOverlaps</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#maxrangereversals">MaxRangeReversals</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#maxranges">MaxRanges</a></li>
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+<li><img alt="" src="../images/down.gif" /> <a href="#mergeslashes">MergeSlashes</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#mergetrailers">MergeTrailers</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#mutex">Mutex</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#namevirtualhost">NameVirtualHost</a></li>
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@@ -3465,6 +3466,30 @@ resource </td></tr>
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</div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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+<div class="directive-section"><h2><a name="MergeSlashes" id="MergeSlashes">MergeSlashes</a> <a name="mergeslashes" id="mergeslashes">Directive</a></h2>
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+<table class="directive">
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+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls whether the server merges consecutive slashes in URLs. </td></tr>
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+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MergeSlashes ON | OFF</code></td></tr>
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+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MergeSlashes ON</code></td></tr>
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+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
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+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
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+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.4.6 in Red Hat Enterprise Linux 7</td></tr>
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+</table>
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+ <p>By default, the server merges (or collapses) multiple consecutive slash
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+ ('/') characters in the path component of the request URL.</p>
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+
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+ <p>When mapping URL's to the filesystem, these multiple slashes are not
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+ significant. However, URL's handled other ways, such as by CGI or proxy,
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+ might prefer to retain the significance of multiple consecutive slashes.
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+ In these cases <code class="directive">MergeSlashes</code> can be set to
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+ <em>OFF</em> to retain the multiple consecutive slashes. In these
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+ configurations, regular expressions used in the configuration file that match
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+ the path component of the URL (<code class="directive">LocationMatch</code>,
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+ <code class="directive">RewriteRule</code>, ...) need to take into account multiple
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+ consecutive slashes.</p>
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+</div>
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+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="MergeTrailers" id="MergeTrailers">MergeTrailers</a> <a name="mergetrailers" id="mergetrailers">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines whether trailers are merged into headers</td></tr>
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--- a/include/http_core.h 2019/03/18 08:49:19 1855736
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+++ b/include/http_core.h 2019/03/18 08:49:59 1855737
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@@ -740,7 +740,7 @@
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#define AP_HTTP_METHODS_LENIENT 1
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#define AP_HTTP_METHODS_REGISTERED 2
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char http_methods;
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-
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+ unsigned int merge_slashes;
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} core_server_config;
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/* for AddOutputFiltersByType in core.c */
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diff --git a/include/httpd.h b/include/httpd.h
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index 65392f8..99f7f04 100644
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--- a/include/httpd.h
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+++ b/include/httpd.h
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@@ -1697,11 +1697,21 @@ AP_DECLARE(int) ap_unescape_url_keep2f(char *url, int decode_slashes);
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AP_DECLARE(int) ap_unescape_urlencoded(char *query);
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/**
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- * Convert all double slashes to single slashes
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- * @param name The string to convert
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+ * Convert all double slashes to single slashes, except where significant
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+ * to the filesystem on the current platform.
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+ * @param name The string to convert, assumed to be a filesystem path
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*/
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AP_DECLARE(void) ap_no2slash(char *name);
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+/**
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+ * Convert all double slashes to single slashes, except where significant
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+ * to the filesystem on the current platform.
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+ * @param name The string to convert
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+ * @param is_fs_path if set to 0, the significance of any double-slashes is
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+ * ignored.
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+ */
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+AP_DECLARE(void) ap_no2slash_ex(char *name, int is_fs_path);
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+
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/**
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* Remove all ./ and xx/../ substrings from a file name. Also remove
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* any leading ../ or /../ substrings.
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diff --git a/server/request.c b/server/request.c
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index dbe3e07..d5c558a 100644
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--- a/server/request.c
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+++ b/server/request.c
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@@ -167,6 +167,8 @@ AP_DECLARE(int) ap_process_request_internal(request_rec *r)
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int file_req = (r->main && r->filename);
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int access_status;
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core_dir_config *d;
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+ core_server_config *sconf =
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+ ap_get_core_module_config(r->server->module_config);
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/* Ignore embedded %2F's in path for proxy requests */
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if (!r->proxyreq && r->parsed_uri.path) {
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@@ -191,6 +193,12 @@ AP_DECLARE(int) ap_process_request_internal(request_rec *r)
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}
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ap_getparents(r->uri); /* OK --- shrinking transformations... */
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+ if (sconf->merge_slashes != AP_CORE_CONFIG_OFF) {
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+ ap_no2slash(r->uri);
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+ if (r->parsed_uri.path) {
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+ ap_no2slash(r->parsed_uri.path);
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+ }
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+ }
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/* All file subrequests are a huge pain... they cannot bubble through the
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* next several steps. Only file subrequests are allowed an empty uri,
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@@ -1411,20 +1419,7 @@ AP_DECLARE(int) ap_location_walk(request_rec *r)
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cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
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cached = (cache->cached != NULL);
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-
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- /* Location and LocationMatch differ on their behaviour w.r.t. multiple
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- * slashes. Location matches multiple slashes with a single slash,
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- * LocationMatch doesn't. An exception, for backwards brokenness is
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- * absoluteURIs... in which case neither match multiple slashes.
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- */
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- if (r->uri[0] != '/') {
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- entry_uri = r->uri;
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- }
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- else {
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- char *uri = apr_pstrdup(r->pool, r->uri);
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- ap_no2slash(uri);
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- entry_uri = uri;
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- }
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+ entry_uri = r->uri;
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/* If we have an cache->cached location that matches r->uri,
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* and the vhost's list of locations hasn't changed, we can skip
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@@ -1491,7 +1486,7 @@ AP_DECLARE(int) ap_location_walk(request_rec *r)
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pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t));
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}
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- if (ap_regexec(entry_core->r, r->uri, nmatch, pmatch, 0)) {
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+ if (ap_regexec(entry_core->r, entry_uri, nmatch, pmatch, 0)) {
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continue;
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}
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@@ -1501,7 +1496,7 @@ AP_DECLARE(int) ap_location_walk(request_rec *r)
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apr_table_setn(r->subprocess_env,
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((const char **)entry_core->refs->elts)[i],
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apr_pstrndup(r->pool,
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- r->uri + pmatch[i].rm_so,
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+ entry_uri + pmatch[i].rm_so,
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pmatch[i].rm_eo - pmatch[i].rm_so));
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}
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}
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diff --git a/server/util.c b/server/util.c
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index fd7a0a1..e0c558c 100644
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--- a/server/util.c
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+++ b/server/util.c
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@@ -561,16 +561,20 @@ AP_DECLARE(void) ap_getparents(char *name)
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name[l] = '\0';
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}
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}
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-
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-AP_DECLARE(void) ap_no2slash(char *name)
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+AP_DECLARE(void) ap_no2slash_ex(char *name, int is_fs_path)
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{
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+
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char *d, *s;
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+ if (!*name) {
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+ return;
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+ }
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+
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s = d = name;
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#ifdef HAVE_UNC_PATHS
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/* Check for UNC names. Leave leading two slashes. */
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- if (s[0] == '/' && s[1] == '/')
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+ if (is_fs_path && s[0] == '/' && s[1] == '/')
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*d++ = *s++;
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#endif
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@@ -587,6 +591,10 @@ AP_DECLARE(void) ap_no2slash(char *name)
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*d = '\0';
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}
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+AP_DECLARE(void) ap_no2slash(char *name)
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+{
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+ ap_no2slash_ex(name, 1);
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+}
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/*
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* copy at most n leading directories of s into d
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diff --git a/server/core.c b/server/core.c
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index b5ab429..a31f1e4 100644
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--- a/server/core.c
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+++ b/server/core.c
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@@ -493,6 +493,7 @@ static void *create_core_server_config(apr_pool_t *a, server_rec *s)
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*/
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conf->trace_enable = AP_TRACE_UNSET;
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+ conf->merge_slashes = AP_CORE_CONFIG_UNSET;
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conf->protocols = apr_array_make(a, 5, sizeof(const char *));
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conf->protocols_honor_order = -1;
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@@ -561,7 +562,9 @@ static void *merge_core_server_configs(apr_pool_t *p, void *basev, void *virtv)
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conf->protocols_honor_order = ((virt->protocols_honor_order < 0)?
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base->protocols_honor_order :
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virt->protocols_honor_order);
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-
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+
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+ AP_CORE_MERGE_FLAG(merge_slashes, conf, base, virt);
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+
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return conf;
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}
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@@ -1872,6 +1875,13 @@ static const char *set_qualify_redirect_url(cmd_parms *cmd, void *d_, int flag)
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return NULL;
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}
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+static const char *set_core_server_flag(cmd_parms *cmd, void *s_, int flag)
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+{
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+ core_server_config *conf =
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+ ap_get_core_module_config(cmd->server->module_config);
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+ return ap_set_flag_slot(cmd, conf, flag);
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+}
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+
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static const char *set_override_list(cmd_parms *cmd, void *d_, int argc, char *const argv[])
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{
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core_dir_config *d = d_;
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@@ -4598,6 +4608,10 @@ AP_INIT_ITERATE("HttpProtocolOptions", set_http_protocol_options, NULL, RSRC_CON
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"'Unsafe' or 'Strict' (default). Sets HTTP acceptance rules"),
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AP_INIT_ITERATE("RegisterHttpMethod", set_http_method, NULL, RSRC_CONF,
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"Registers non-standard HTTP methods"),
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+AP_INIT_FLAG("MergeSlashes", set_core_server_flag,
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+ (void *)APR_OFFSETOF(core_server_config, merge_slashes),
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+ RSRC_CONF,
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+ "Controls whether consecutive slashes in the URI path are merged"),
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{ NULL }
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};
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