97677: Check whether a link exists. r=cmanske,sr=darinf

netwerk/base/src/Makefile.in

@@ -66,6 +66,7 @@ CPPSRCS		= \
 		nsStreamListenerTee.cpp \
 		nsStreamLoader.cpp \
 		nsStreamProviderProxy.cpp \
+		nsURIChecker.cpp \
 		nsURLHelper.cpp \
 		$(NULL)
 

netwerk/base/src/makefile.win

@@ -64,6 +64,7 @@ CPP_OBJS =                                         \
         .\$(OBJDIR)\nsAsyncStreamListener.obj      \
         .\$(OBJDIR)\nsStorageTransport.obj         \
         .\$(OBJDIR)\nsStreamListenerTee.obj        \
+        .\$(OBJDIR)\nsURIChecker.obj               \
 	$(NULL)
 
 JSFILES = \

netwerk/build/nsNetCID.h

@@ -214,6 +214,18 @@
     {0xbb, 0x4f, 0x96, 0x5c, 0xff, 0xd2, 0x3e, 0xce} \
 }
 
+#define NS_URICHECKER_CLASSNAME \
+    "URI Checker"
+#define NS_URICHECKER_CONTRACT_ID \
+    "@mozilla.org/network/urichecker;1"
+#define NS_URICHECKER_CID \
+{ /* cf3a0e06-1dd1-11b2-a904-ac1d6da77a02 */         \
+    0xcf3a0e06,                                      \
+    0x1dd1,                                          \
+    0x11b2,                                          \
+    {0xa9, 0x04, 0xac, 0x1d, 0x6d, 0xa7, 0x7a, 0x02} \
+}
+
 
 /******************************************************************************
  * netwerk/cache/ classes

netwerk/build/nsNetModule.cpp

@@ -34,6 +34,7 @@
  * the terms of any one of the NPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
+
 #include "nsCOMPtr.h"
 #include "nsIModule.h"
 #include "nsIGenericFactory.h"
@@ -120,6 +121,10 @@ NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsResProtocolHandler, Init)
 
 ///////////////////////////////////////////////////////////////////////////////
 
+#include "nsURIChecker.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsURIChecker)
+
+///////////////////////////////////////////////////////////////////////////////
 
 static NS_METHOD
 RegisterBuiltInURLParsers(nsIComponentManager *aCompMgr, 
@@ -656,6 +661,12 @@ static nsModuleComponentInfo gNetModuleInfo[] = {
       NS_LOCALFILEOUTPUTSTREAM_CONTRACTID,
       nsFileOutputStream::Create },
     
+    { "URIChecker",
+      NS_URICHECKER_CID,
+      NS_URICHECKER_CONTRACT_ID,
+      nsURICheckerConstructor
+    },
+
     // The register functions for the build in 
     // parsers just need to be called once.
     { "StdURLParser",