From 2c2e9d314ddfcdf1925da409ef1f7970e3434b42 Mon Sep 17 00:00:00 2001
From: "nhotta%netscape.com"
 <nhotta%netscape.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Wed, 14 Nov 2001 23:45:23 +0000
Subject: [PATCH] Changed location.href to force escape 8 bit if the href
 contains 8 bit, bug 40469, r=ftang, sr=jst.

git-svn-id: svn://10.0.0.236/trunk@108102 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/dom/src/base/nsLocation.cpp | 98 ++++++++++++++++++++++++++++-
 1 file changed, 97 insertions(+), 1 deletion(-)

diff --git a/mozilla/dom/src/base/nsLocation.cpp b/mozilla/dom/src/base/nsLocation.cpp
index 045b3505c53..1587d02ff19 100644
--- a/mozilla/dom/src/base/nsLocation.cpp
+++ b/mozilla/dom/src/base/nsLocation.cpp
@@ -61,6 +61,91 @@
 #include "nsXPIDLString.h"
 #include "nsDOMError.h"
 #include "nsDOMClassInfo.h"
+#include "nsICharsetConverterManager.h"
+#include "nsICharsetConverterManager2.h"
+
+
+static nsresult EscapeNonAsciiInURI(nsAReadableString& aHref, nsAWritableCString& aEscapedHref)
+{
+  aEscapedHref.Truncate(0);
+
+  nsresult rv;
+
+  // Get a document charset, no escaping in case of failure.
+  nsCOMPtr<nsIJSContextStack> stack(do_GetService("@mozilla.org/js/xpc/ContextStack;1", &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  JSContext *cx;
+
+  rv = stack->Peek(&cx);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIScriptGlobalObject> nativeGlob;
+  nsJSUtils::GetDynamicScriptGlobal(cx, getter_AddRefs(nativeGlob));
+  NS_ENSURE_TRUE(nativeGlob, NS_ERROR_FAILURE);
+
+  nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(nativeGlob);
+  NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
+
+  nsCOMPtr<nsIDOMDocument> domDoc;
+  rv = window->GetDocument(getter_AddRefs(domDoc));
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (!domDoc)
+    return NS_OK;
+
+  nsCOMPtr<nsIDocument> doc(do_QueryInterface(domDoc));
+  NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
+
+  nsAutoString charset;
+  rv = doc->GetDocumentCharacterSet(charset);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Convert from Unicode to a document charset.
+  nsCOMPtr <nsICharsetConverterManager2> ccm2 = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr <nsIAtom> charsetAtom;
+  rv = ccm2->GetCharsetAtom(charset.get(), getter_AddRefs(charsetAtom));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIUnicodeEncoder> encoder;
+  rv = ccm2->GetUnicodeEncoder(charsetAtom, getter_AddRefs(encoder));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  const nsAFlatString &tmp = PromiseFlatString(aHref);
+  PRInt32 len;
+
+  rv = encoder->GetMaxLength(tmp.get(), tmp.Length(), &len);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  PRInt32 bufferLen = len;
+  char* buffer = (char *) nsMemory::Alloc(bufferLen);
+  NS_ENSURE_TRUE(buffer, NS_ERROR_OUT_OF_MEMORY);
+
+  rv = encoder->Convert(tmp.get(), &len, buffer, &bufferLen);
+  if (NS_FAILED(rv)) {
+    nsMemory::Free(buffer);
+    return rv;
+  }
+
+  // Escape any 8 bit data.
+  const char* hexChars = "0123456789ABCDEF";
+  for (PRUint32 i = 0; i < (PRUint32) len; i++) {
+    unsigned char c = (unsigned char) buffer[i];
+    if (c < 128) {
+      aEscapedHref.Append((char) c);
+    }
+    else {
+      aEscapedHref.Append('%');
+      aEscapedHref.Append(hexChars[c >> 4]);     /* high nibble */
+      aEscapedHref.Append(hexChars[c & 0x0f]);   /* low nibble */
+    }
+  }
+
+  nsMemory::Free(buffer);
+
+  return rv;
+}
 
 LocationImpl::LocationImpl(nsIDocShell *aDocShell)
 {
@@ -416,7 +501,18 @@ LocationImpl::SetHrefWithBase(const nsAReadableString& aHref,
   nsresult result;
   nsCOMPtr<nsIURI> newUri;
 
-  result = NS_NewURI(getter_AddRefs(newUri), aHref, aBase);
+  // 'aHref' is supposed to be already escaped by the script
+  // but if it contains 8 bit characters without escaped then force to escape it.
+  // This is for comptibility reason, some of the existing pages do not escape hrefs
+  // and they are working on 4.x.
+  nsCAutoString escapedHref;
+  if (!nsCRT::IsAscii(PromiseFlatString(aHref).get()))
+    (void) EscapeNonAsciiInURI(aHref, escapedHref);
+
+  if (escapedHref.IsEmpty())
+    result = NS_NewURI(getter_AddRefs(newUri), aHref, aBase);
+  else
+    result = NS_NewURI(getter_AddRefs(newUri), escapedHref.get(), aBase);
 
   if (newUri && mDocShell) {
     nsCOMPtr<nsIDocShellLoadInfo> loadInfo;