Allow trailing dots on hostnames....

net/base/net_util.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/base/net_util.h"
 
 #include <algorithm>
 #include <map>
 #include <unicode/ucnv.h>
 #include <unicode/uidna.h>
@@ skipping 947 matching lines @@
 }
 
 inline bool IsHostCharDigit(char c) {
   return (c >= '0') && (c <= '9');
 }
 
 bool IsCanonicalizedHostCompliant(const std::string& host) {
   if (host.empty())
     return false;
 
-  enum State {
-    NOT_IN_COMPONENT,
-    IN_COMPONENT_STARTED_DIGIT,
-    IN_COMPONENT_STARTED_ALPHA
-  } state = NOT_IN_COMPONENT;
+  bool in_component = false;
+  bool most_recent_component_started_alpha = false;
   bool last_char_was_hyphen_or_underscore = false;
 
   for (std::string::const_iterator i(host.begin()); i != host.end(); ++i) {
     const char c = *i;
-    if (state == NOT_IN_COMPONENT) {
-      if (IsHostCharDigit(c))
-        state = IN_COMPONENT_STARTED_DIGIT;
-      else if (IsHostCharAlpha(c))
-        state = IN_COMPONENT_STARTED_ALPHA;
-      else
+    if (!in_component) {
+      most_recent_component_started_alpha = IsHostCharAlpha(c);
+      if (!most_recent_component_started_alpha && !IsHostCharDigit(c))
         return false;
+      in_component = true;
     } else {
       if (c == '.') {
         if (last_char_was_hyphen_or_underscore)
           return false;
-        state = NOT_IN_COMPONENT;
+        in_component = false;
       } else if (IsHostCharAlpha(c) || IsHostCharDigit(c)) {
         last_char_was_hyphen_or_underscore = false;
       } else if ((c == '-') || (c == '_')) {
         last_char_was_hyphen_or_underscore = true;
       } else {
         return false;
       }
     }
   }
 
-  return state == IN_COMPONENT_STARTED_ALPHA;
+  return most_recent_component_started_alpha;
 }
 
 std::string GetDirectoryListingEntry(const string16& name,
                                      const std::string& raw_bytes,
                                      bool is_dir,
                                      int64 size,
                                      Time modified) {
   std::string result;
   result.append("<script>addRow(");
   base::JsonDoubleQuote(name, true, &result);
@@ skipping 441 matching lines @@
       if (length > 0)
         ports.insert(StringToInt(WideToASCII(
             allowed_ports.substr(last, length))));
       last = i + 1;
     }
   }
   explicitly_allowed_ports = ports;
 }
 
 }  // namespace net