fixes bug 282270 (and bug 282520) "always show punycode by default" r=dbaron sr=dveditz a=dbaron

modules/libpref/src/init/all.js

@@ -553,6 +553,11 @@ pref("network.http.pipelining.maxrequests" , 4);
 // are handled.  IDN requires a nsIIDNService implementation.
 pref("network.enableIDN", true);
 
+// This preference, if true, causes all UTF-8 domain names to be normalized to
+// punycode.  The intention is to allow UTF-8 domain names as input, but never
+// generate them from punycode.
+pref("network.IDN_show_punycode", true);
+
 // This preference specifies a list of domains for which DNS lookups will be
 // IPv4 only. Works around broken DNS servers which can't handle IPv6 lookups
 // and/or allows the user to disable IPv6 on a per-domain basis. See bug 68796.

netwerk/dns/src/nsIDNService.cpp

@@ -54,8 +54,9 @@ static const PRUint32 kMaxDNSNodeLen = 63;
 
 //-----------------------------------------------------------------------------
 
-#define NS_NET_PREF_IDNTESTBED "network.IDN_testbed"
-#define NS_NET_PREF_IDNPREFIX  "network.IDN_prefix"
+#define NS_NET_PREF_IDNTESTBED      "network.IDN_testbed"
+#define NS_NET_PREF_IDNPREFIX       "network.IDN_prefix"
+#define NS_NET_PREF_IDNSHOWPUNYCODE "network.IDN_show_punycode"
 
 //-----------------------------------------------------------------------------
 // nsIDNService
@@ -73,8 +74,9 @@ nsresult nsIDNService::Init()
   if (prefInternal) {
     prefInternal->AddObserver(NS_NET_PREF_IDNTESTBED, this, PR_TRUE); 
     prefInternal->AddObserver(NS_NET_PREF_IDNPREFIX, this, PR_TRUE); 
+    prefInternal->AddObserver(NS_NET_PREF_IDNSHOWPUNYCODE, this, PR_TRUE); 
+    prefsChanged(prefInternal, nsnull);
   }
-
   return NS_OK;
 }
 
@@ -84,26 +86,32 @@ NS_IMETHODIMP nsIDNService::Observe(nsISupports *aSubject,
 {
   if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
     nsCOMPtr<nsIPrefBranch> prefBranch( do_QueryInterface(aSubject) );
-    if (prefBranch) {
-      // to support test environment which is a temporary testing environment
-      // until IDN is actually deployed
-      if (NS_LITERAL_STRING(NS_NET_PREF_IDNTESTBED).Equals(aData)) {
-        PRBool val;
-        if (NS_SUCCEEDED(prefBranch->GetBoolPref(NS_NET_PREF_IDNTESTBED, &val)))
-          mMultilingualTestBed = val;
-      }
-      else if (NS_LITERAL_STRING(NS_NET_PREF_IDNPREFIX).Equals(aData)) {
-        nsXPIDLCString prefix;
-        nsresult rv = prefBranch->GetCharPref(NS_NET_PREF_IDNPREFIX, getter_Copies(prefix));
-        if (NS_SUCCEEDED(rv) && prefix.Length() <= kACEPrefixLen)
-          PL_strncpyz(nsIDNService::mACEPrefix, prefix.get(), kACEPrefixLen + 1);
-      }
-    }
+    if (prefBranch)
+      prefsChanged(prefBranch, aData);
   }
-
   return NS_OK;
 }
 
+void nsIDNService::prefsChanged(nsIPrefBranch *prefBranch, const PRUnichar *pref)
+{
+  if (!pref || NS_LITERAL_STRING(NS_NET_PREF_IDNTESTBED).Equals(pref)) {
+    PRBool val;
+    if (NS_SUCCEEDED(prefBranch->GetBoolPref(NS_NET_PREF_IDNTESTBED, &val)))
+      mMultilingualTestBed = val;
+  }
+  if (!pref || NS_LITERAL_STRING(NS_NET_PREF_IDNPREFIX).Equals(pref)) {
+    nsXPIDLCString prefix;
+    nsresult rv = prefBranch->GetCharPref(NS_NET_PREF_IDNPREFIX, getter_Copies(prefix));
+    if (NS_SUCCEEDED(rv) && prefix.Length() <= kACEPrefixLen)
+      PL_strncpyz(nsIDNService::mACEPrefix, prefix.get(), kACEPrefixLen + 1);
+  }
+  if (!pref || NS_LITERAL_STRING(NS_NET_PREF_IDNSHOWPUNYCODE).Equals(pref)) {
+    PRBool val;
+    if (NS_SUCCEEDED(prefBranch->GetBoolPref(NS_NET_PREF_IDNSHOWPUNYCODE, &val)))
+      mShowPunycode = val;
+  }
+}
+
 nsIDNService::nsIDNService()
 {
   nsresult rv;
@@ -113,6 +121,7 @@ nsIDNService::nsIDNService()
   strcpy(mACEPrefix, kIDNSPrefix);
 
   mMultilingualTestBed = PR_FALSE;
+  mShowPunycode = PR_FALSE;
 
   if (idn_success != idn_nameprep_create(NULL, &mNamePrepHandle))
     mNamePrepHandle = nsnull;
@@ -183,7 +192,7 @@ NS_IMETHODIMP nsIDNService::ConvertACEtoUTF8(const nsACString & input, nsACStrin
   // ToUnicode never fails.  If any step fails, then the original input
   // sequence is returned immediately in that step.
 
-  if (!IsASCII(input)) {
+  if (mShowPunycode || !IsASCII(input)) {
     _retval.Assign(input);
     return NS_OK;
   }
@@ -246,8 +255,14 @@ NS_IMETHODIMP nsIDNService::Normalize(const nsACString & input, nsACString & out
   // protect against bogus input
   NS_ENSURE_TRUE(IsUTF8(input), NS_ERROR_UNEXPECTED);
 
+  if (mShowPunycode)
+    return ConvertUTF8toACE(input, output);
+
+  NS_ConvertUTF8toUTF16 inUTF16(input);
+  normalizeFullStops(inUTF16);
+
   nsAutoString outUTF16;
-  nsresult rv = stringPrep(NS_ConvertUTF8toUTF16(input), outUTF16);
+  nsresult rv = stringPrep(inUTF16, outUTF16);
   if (NS_SUCCEEDED(rv))
     CopyUTF16toUTF8(outUTF16, output);
   return rv;

netwerk/dns/src/nsIDNService.h

@@ -46,6 +46,8 @@
 #include "nsIUnicodeNormalizer.h"
 #include "nsIDNKitInterface.h"
 
+class nsIPrefBranch;
+
 //-----------------------------------------------------------------------------
 // nsIDNService
 //-----------------------------------------------------------------------------
@@ -72,8 +74,10 @@ private:
   nsresult encodeToACE(const nsAString& in, nsACString& out);
   nsresult stringPrep(const nsAString& in, nsAString& out);
   nsresult decodeACE(const nsACString& in, nsACString& out);
+  void prefsChanged(nsIPrefBranch *prefBranch, const PRUnichar *pref);
   
   PRBool mMultilingualTestBed;  // if true generates extra node for mulitlingual testbed 
+  PRBool mShowPunycode;
   idn_nameprep_t mNamePrepHandle;
   nsCOMPtr<nsIUnicodeNormalizer> mNormalizer;
   char mACEPrefix[kACEPrefixLen+1];