[ServiceWorker] Implement Headers class.

Source/modules/serviceworkers/FetchHeaderList.h

+// Copyright 2014 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.
+
+#ifndef FetchHeaderList_h
+#define FetchHeaderList_h
+
+#include "wtf/OwnPtr.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
+#include "wtf/Vector.h"
+#include "wtf/text/WTFString.h"
+#include <utility>
+
+namespace WebCore {
+
+// http://fetch.spec.whatwg.org/#terminology-headers
+class FetchHeaderList FINAL : public RefCounted<FetchHeaderList> {
+public:
+    typedef std::pair<String, String> Header;
+    static PassRefPtr<FetchHeaderList> create();
+
+    ~FetchHeaderList();
+    void append(const String&, const String&);
+    void set(const String&, const String&);
+    // FIXME: Implement parse()
+    // FIXME: Implement extractMIMEType()
+
+    size_t size() const;
+    void remove(const String&);
+    bool get(const String&, String&) const;
+    void getAll(const String&, Vector<String>&) const;
+    bool has(const String&) const;
+    void clearList();
+
+    const Vector<OwnPtr<Header> >& list() const { return m_headerList; }
+
+    static bool isValidHeaderName(const String&);
+    static bool isValidHeaderValue(const String&);
+    static bool isSimpleHeader(const String&, const String&);
+    static bool isForbiddenHeaderName(const String&);
+    static bool isForbiddenResponseHeaderName(const String&);
+
+private:
+    FetchHeaderList();
+    Vector<OwnPtr<Header> > m_headerList;
+};
+
+} // namespace WebCore
+
+#endif // FetchHeaderList_h