[ServiceWorker] Implement Headers class.

Source/modules/serviceworkers/FetchHeaderList.cpp

+// 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.
+
+#include "config.h"
+#include "FetchHeaderList.h"
+
+#include "core/fetch/CrossOriginAccessControl.h"
+#include "core/xml/XMLHttpRequest.h"
+#include "platform/network/HTTPParsers.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace WebCore {
+
+PassRefPtr<FetchHeaderList> FetchHeaderList::create()
+{
+    return adoptRef(new FetchHeaderList());
+}
+
+FetchHeaderList::FetchHeaderList()
+{
+}
+
+FetchHeaderList::~FetchHeaderList()
+{
+}
+
+void FetchHeaderList::append(const String& name, const String& value)
+{
+    // To append a name/value (name/value) pair to a header list (list), append
+    // a new header whose name is name and value is value, to list.
+    m_headerList.append(adoptPtr(new Header(name, value)));
+}
+
+void FetchHeaderList::set(const String& name, const String& value)
+{
+    // To set a name/value (name/value) pair in a header list (list), run these
+    // steps:
+    // 1. If there are any headers in list whose name is name, set the value of
+    //    the first such header to value and remove the others.
+    // 2. Otherwise, append a new header whose name is name and value is value,
+    //    to list.
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name) {
+            m_headerList[i]->second = value;
+            for (size_t j = i + 1; j < m_headerList.size(); ) {
+                if (m_headerList[j]->first == name)
+                    m_headerList.remove(j);
+                else
+                    ++j;
+            }
+            return;
+        }
+    }
+    m_headerList.append(adoptPtr(new Header(name, value)));
+}
+
+size_t FetchHeaderList::size() const
+{
+    return m_headerList.size();
+}
+
+void FetchHeaderList::remove(const String& name)
+{
+    for (size_t i = 0; i < m_headerList.size(); ) {
+        if (m_headerList[i]->first == name) {
+            m_headerList.remove(i);
+        } else {
+            ++i;
+        }
+    }
+}
+
+bool FetchHeaderList::get(const String& name, String& result) const
+{
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name) {
+            result = m_headerList[i]->second;
+            return true;
+        }
+    }
+    return false;
+}
+
+void FetchHeaderList::getAll(const String& name, Vector<String>& result) const
+{
+    result.clear();
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name)
+            result.append(m_headerList[i]->second);
+    }
+}
+
+bool FetchHeaderList::has(const String& name) const
+{
+    for (size_t i = 0; i < m_headerList.size(); ++i) {
+        if (m_headerList[i]->first == name)
+            return true;
+    }
+    return false;
+}
+
+void FetchHeaderList::clearList()
+{
+    m_headerList.clear();
+}
+
+bool FetchHeaderList::isValidHeaderName(const String& name)
+{
+    // FIXME: According to the spec (http://fetch.spec.whatwg.org/) should we
+    // accept all characters in the range 0x00 to 0x7F?
+    return isValidHTTPToken(name);
+}
+
+bool FetchHeaderList::isValidHeaderValue(const String& value)
+{
+    // A value is a byte sequence that matches the field-value token production
+    // and contains no 0x0A or 0x0D bytes.
+    return (value.find('\r') == kNotFound) && (value.find('\n') == kNotFound);
+}
+
+bool FetchHeaderList::isSimpleHeader(const String& name, const String& value)
+{
+    // A simple header is a header whose name is either one of `Accept`,
+    // `Accept-Language`, and `Content-Language`, or whose name is
+    // `Content-Type` and value, once parsed, is one of
+    // `application/x-www-form-urlencoded`, `multipart/form-data`, and
+    // `text/plain`.
+    return isOnAccessControlSimpleRequestHeaderWhitelist(AtomicString(name), AtomicString(value));
+}
+
+bool FetchHeaderList::isForbiddenHeaderName(const String& name)
+{
+    // A forbidden header name is a header names that is one of:
+    //   Accept-Charset, Accept-Encoding, Access-Control-Request-Headers,
+    //   Access-Control-Request-Method, Connection, Content-Length, Cookie,
+    //   Cookie2, Date, DNT, Expect, Host, Keep-Alive, Origin, Referer, TE,
+    //   Trailer, Transfer-Encoding, Upgrade, User-Agent, Via
+    // and a header name that starts with Proxy- or Sec- (including when it is
+    // just Proxy- or Sec-).
+    return !XMLHttpRequest::isAllowedHTTPHeader(name);
+}
+
+bool FetchHeaderList::isForbiddenResponseHeaderName(const String& name)
+{
+    // A forbidden response header name is a header name that is one of:
+    // `Set-Cookie`, `Set-Cookie2`
+    return equalIgnoringCase(name, "set-cookie") || equalIgnoringCase(name, "set-cookie2");
+}
+
+} // namespace WebCore