Push API: Implement and ship PushSubscription.options

third_party/WebKit/Source/modules/push_messaging/PushSubscriptionOptions.cpp

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/push_messaging/PushSubscriptionOptions.h"
+
+#include "bindings/core/v8/ExceptionState.h"
+#include "core/dom/DOMArrayBuffer.h"
+#include "core/dom/ExceptionCode.h"
+#include "modules/push_messaging/PushSubscriptionOptionsInit.h"
+#include "public/platform/WebString.h"
+#include "public/platform/modules/push_messaging/WebPushSubscriptionOptions.h"
+#include "wtf/Assertions.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+namespace {
+
+const int kMaxApplicationServerKeyLength = 255;
+
+String bufferSourceToString(const ArrayBufferOrArrayBufferView& applicationServerKey, ExceptionState& exceptionState)
+{
+    // Check the validity of the sender info. It must be a 65 byte unencrypted key,
+    // which has the byte 0x04 as the first byte as a marker.
+    unsigned char* input;
+    int length;
+    if (applicationServerKey.isArrayBuffer()) {
+        input = static_cast<unsigned char*>(
+            applicationServerKey.getAsArrayBuffer()->data());
+        length = applicationServerKey.getAsArrayBuffer()->byteLength();
+    } else if (applicationServerKey.isArrayBufferView()) {
+        input = static_cast<unsigned char*>(
+            applicationServerKey.getAsArrayBufferView()->buffer()->data());
+        length = applicationServerKey.getAsArrayBufferView()->buffer()->byteLength();
+    } else {
+        NOTREACHED();
+        return String();
+    }
+
+    // If the key is valid, just treat it as a string of bytes and pass it to
+    // the push service.
+    if (length <= kMaxApplicationServerKeyLength)
+        return WebString::fromLatin1(input, length);
+
+    exceptionState.throwDOMException(InvalidAccessError, "The provided applicationServerKey is not valid.");
+    return String();
+}
+
+} // namespace
+
+// static
+WebPushSubscriptionOptions PushSubscriptionOptions::toWeb(const PushSubscriptionOptionsInit& options, ExceptionState& exceptionState)
+{
+    WebPushSubscriptionOptions webOptions;
+    webOptions.userVisibleOnly = options.userVisibleOnly();
+    if (options.hasApplicationServerKey())
+        webOptions.applicationServerKey = bufferSourceToString(options.applicationServerKey(), exceptionState);
+    return webOptions;
+}
+
+PushSubscriptionOptions::PushSubscriptionOptions(const WebPushSubscriptionOptions& options)
+    : m_userVisibleOnly(options.userVisibleOnly)
+    , m_applicationServerKey(DOMArrayBuffer::create(options.applicationServerKey.latin1().data(), options.applicationServerKey.length()))
+{
+}
+
+DEFINE_TRACE(PushSubscriptionOptions)
+{
+    visitor->trace(m_applicationServerKey);
+}
+
+} // namespace blink