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-rw-r--r--netwerk/protocol/data/nsDataChannel.cpp109
1 files changed, 109 insertions, 0 deletions
diff --git a/netwerk/protocol/data/nsDataChannel.cpp b/netwerk/protocol/data/nsDataChannel.cpp
new file mode 100644
index 0000000000..2b96cb0853
--- /dev/null
+++ b/netwerk/protocol/data/nsDataChannel.cpp
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// data implementation
+
+#include "nsDataChannel.h"
+
+#include "mozilla/Base64.h"
+#include "nsDataHandler.h"
+#include "nsIInputStream.h"
+#include "nsEscape.h"
+#include "nsStringStream.h"
+
+using namespace mozilla;
+
+/**
+ * Helper for performing a fallible unescape.
+ *
+ * @param aStr The string to unescape.
+ * @param aBuffer Buffer to unescape into if necessary.
+ * @param rv Out: nsresult indicating success or failure of unescaping.
+ * @return Reference to the string containing the unescaped data.
+ */
+const nsACString& Unescape(const nsACString& aStr, nsACString& aBuffer,
+ nsresult* rv) {
+ MOZ_ASSERT(rv);
+
+ bool appended = false;
+ *rv = NS_UnescapeURL(aStr.Data(), aStr.Length(), /* aFlags = */ 0, aBuffer,
+ appended, mozilla::fallible);
+ if (NS_FAILED(*rv) || !appended) {
+ return aStr;
+ }
+
+ return aBuffer;
+}
+
+nsresult nsDataChannel::OpenContentStream(bool async, nsIInputStream** result,
+ nsIChannel** channel) {
+ NS_ENSURE_TRUE(URI(), NS_ERROR_NOT_INITIALIZED);
+
+ nsresult rv;
+
+ // In order to avoid potentially building up a new path including the
+ // ref portion of the URI, which we don't care about, we clone a version
+ // of the URI that does not have a ref and in most cases should share
+ // string buffers with the original URI.
+ nsCOMPtr<nsIURI> uri;
+ rv = NS_GetURIWithoutRef(URI(), getter_AddRefs(uri));
+ if (NS_FAILED(rv)) return rv;
+
+ nsAutoCString path;
+ rv = uri->GetPathQueryRef(path);
+ if (NS_FAILED(rv)) return rv;
+
+ nsCString contentType, contentCharset;
+ nsDependentCSubstring dataRange;
+ bool lBase64;
+ rv = nsDataHandler::ParsePathWithoutRef(path, contentType, &contentCharset,
+ lBase64, &dataRange);
+ if (NS_FAILED(rv)) return rv;
+
+ // This will avoid a copy if nothing needs to be unescaped.
+ nsAutoCString unescapedBuffer;
+ const nsACString& data = Unescape(dataRange, unescapedBuffer, &rv);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ if (lBase64 && &data == &unescapedBuffer) {
+ // Don't allow spaces in base64-encoded content. This is only
+ // relevant for escaped spaces; other spaces are stripped in
+ // NewURI. We know there were no escaped spaces if the data buffer
+ // wasn't used in |Unescape|.
+ unescapedBuffer.StripWhitespace();
+ }
+
+ nsCOMPtr<nsIInputStream> bufInStream;
+ uint32_t contentLen;
+ if (lBase64) {
+ nsAutoCString decodedData;
+ rv = Base64Decode(data, decodedData);
+ if (NS_FAILED(rv)) {
+ // Returning this error code instead of what Base64Decode returns
+ // (NS_ERROR_ILLEGAL_VALUE) will prevent rendering of redirect response
+ // content by HTTP channels. It's also more logical error to return.
+ // Here we know the URL is actually corrupted.
+ return NS_ERROR_MALFORMED_URI;
+ }
+
+ contentLen = decodedData.Length();
+ rv = NS_NewCStringInputStream(getter_AddRefs(bufInStream), decodedData);
+ } else {
+ contentLen = data.Length();
+ rv = NS_NewCStringInputStream(getter_AddRefs(bufInStream), data);
+ }
+
+ if (NS_FAILED(rv)) return rv;
+
+ SetContentType(contentType);
+ SetContentCharset(contentCharset);
+ mContentLength = contentLen;
+
+ bufInStream.forget(result);
+
+ return NS_OK;
+}