wallpaper for a bit of bug 120327; this should keep us from appending

".exe" all the time to things on Windows.  patch by me and
jruderman@hmc.edu, r=law, sr=jag, a=asa

uriloader/exthandler/nsExternalHelperAppService.cpp

@@ -275,7 +275,20 @@ NS_IMETHODIMP nsExternalHelperAppService::DoContent(const char *aMimeContentType
   // (2) if we don't have a match yet, see if this type is in our list of extras.
   if (!mimeInfo)
   {
+#ifdef XP_WIN
+    /* XXX Gross hack to wallpaper over the most common Win32
+     * extension issues caused by the fix for bug 116938.  See bug
+     * 120327, comment 271 for why this is needed.  Not even sure we
+     * want to remove this once we have fixed all this stuff to work
+     * right; any info we get from extras on this type is pretty much
+     * useless....
+     */
+    if (PL_strcasecmp(aMimeContentType, APPLICATION_OCTET_STREAM) != 0) {
+#endif
       GetMIMEInfoForMimeTypeFromExtras(aMimeContentType, getter_AddRefs(mimeInfo));
+#ifdef XP_WIN
+    }
+#endif
   }
 
   // (3) if we STILL don't have a mime object for this content type then give up

uriloader/exthandler/win/nsOSHelperAppService.cpp

@@ -29,6 +29,7 @@
 #include "nsMimeTypes.h"
 #include "nsILocalFile.h"
 #include "nsIProcess.h"
+#include "plstr.h"
 
 // we need windows.h to read out registry information...
 #include <windows.h>
@@ -374,6 +375,17 @@ NS_IMETHODIMP nsOSHelperAppService::GetFromMIMEType(const char *aMIMEType, nsIMI
   nsresult rv = nsExternalHelperAppService::GetFromMIMEType(aMIMEType, _retval);
   if (NS_SUCCEEDED(rv) && *_retval) return NS_OK; // okay we got an entry so we are done.
 
+  if (PL_strcasecmp(aMIMEType, APPLICATION_OCTET_STREAM) == 0) {
+    /* XXX Gross hack to wallpaper over the most common Win32
+     * extension issues caused by the fix for bug 116938.  See bug
+     * 120327, comment 271 for why this is needed.  Not even sure we
+     * want to remove this once we have fixed all this stuff to work
+     * right; any info we get from the OS on this type is pretty much
+     * useless....
+     */
+    return NS_ERROR_FAILURE;
+  }
+  
   // (1) try to use the windows mime database to see if there is a mapping to a file extension
   // (2) try to see if we have some left over 4.x registry info we can peek at...
   nsCAutoString fileExtension;