bug 383478 deal with %00 in file urls, r=bz,darin

netwerk/base/src/nsURLHelperOS2.cpp

@@ -130,6 +130,8 @@ net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result)
     }
     
     NS_UnescapeURL(path);
+    if (path.Length() != strlen(path.get()))
+        return NS_ERROR_FILE_INVALID_PATH;
 
     // remove leading '\'
     if (path.CharAt(0) == '\\')

netwerk/base/src/nsURLHelperOSX.cpp

@@ -231,6 +231,8 @@ net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result)
   }
 
   NS_UnescapeURL(path);
+  if (path.Length() != strlen(path.get()))
+    return NS_ERROR_FILE_INVALID_PATH;
 
   if (bHFSPath)
     convertHFSPathtoPOSIX(path, path);

netwerk/base/src/nsURLHelperUnix.cpp

@@ -114,6 +114,8 @@ net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result)
     }
     
     NS_UnescapeURL(path);
+    if (path.Length() != strlen(path.get()))
+        return NS_ERROR_FILE_INVALID_PATH;
 
     if (IsUTF8(path)) {
         // speed up the start-up where UTF-8 is the native charset

netwerk/base/src/nsURLHelperWin.cpp

@@ -130,6 +130,8 @@ net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result)
     }
     
     NS_UnescapeURL(path);
+    if (path.Length() != strlen(path.get()))
+        return NS_ERROR_FILE_INVALID_PATH;
 
     // remove leading '\'
     if (path.CharAt(0) == '\\')