[ServiceWorker] Make Response class better conformance with the spec.

Source/modules/serviceworkers/FetchResponseData.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 "FetchResponseData.h"
+
+#include "core/fetch/CrossOriginAccessControl.h"
+#include "modules/serviceworkers/FetchHeaderList.h"
+#include "public/platform/WebServiceWorkerResponse.h"
+
+namespace WebCore {
+
+PassRefPtr<FetchResponseData> FetchResponseData::create()
+{
+    // "Unless stated otherwise, a response's url is null, status is 200, status
+    // message is `OK`, header list is an empty header list, and body is null."
+    return adoptRef(new FetchResponseData(DefaultType, 200, "OK"));
+}
+
+PassRefPtr<FetchResponseData> FetchResponseData::createNetworkErrorResponse()
+{
+    // "A network error is a response whose status is always 0, status message
+    // is always the empty byte sequence, header list is aways an empty list,
+    // and body is always null."
+    return adoptRef(new FetchResponseData(ErrorType, 0, ""));
+}
+
+PassRefPtr<FetchResponseData> FetchResponseData::createBasicFilteredResponse()
+{
+    // "A basic filtered response is a filtered response whose type is |basic|,
+    // header list excludes any headers in internal response's header list whose
+    // name is `Set-Cookie` or `Set-Cookie2`."
+    RefPtr<FetchResponseData> response = adoptRef(new FetchResponseData(BasicType, m_status, m_statusMessage));
+    response->m_url = m_url;
+    for (size_t i = 0; i < m_headerList->size(); ++i) {
+        const FetchHeaderList::Header* header = m_headerList->list()[i].get();
+        if (header->first == "set-cookie" || header->first == "set-cookie2")
+            continue;
+        response->m_headerList->append(header->first, header->second);
+    }
+    response->m_blobDataHandle = m_blobDataHandle;
+    response->m_internalResponse = this;
+    return response.release();
+}
+
+PassRefPtr<FetchResponseData> FetchResponseData::createCORSFilteredResponse()
+{
+    // "A CORS filtered response is a filtered response whose type is |CORS|,
+    // header list excludes all headers in internal response's header list,
+    // except those whose name is either one of `Cache-Control`,
+    // `Content-Language`, `Content-Type`, `Expires`, `Last-Modified`, and
+    // `Pragma`, and except those whose name is one of the values resulting from
+    // parsing `Access-Control-Expose-Headers` in internal response's header
+    // list."
+    RefPtr<FetchResponseData> response = adoptRef(new FetchResponseData(CORSType, m_status, m_statusMessage));
+    response->m_url = m_url;
+    HTTPHeaderSet accessControlExposeHeaderSet;
+    String accessControlExposeHeaders;
+    if (m_headerList->get("access-control-expose-headers", accessControlExposeHeaders))
+        parseAccessControlExposeHeadersAllowList(accessControlExposeHeaders, accessControlExposeHeaderSet);
+    for (size_t i = 0; i < m_headerList->size(); ++i) {
+        const FetchHeaderList::Header* header = m_headerList->list()[i].get();
+        if (!isOnAccessControlResponseHeaderWhitelist(header->first) && !accessControlExposeHeaderSet.contains(header->first))
+            continue;
+        response->m_headerList->append(header->first, header->second);
+    }
+    response->m_blobDataHandle = m_blobDataHandle;
+    response->m_internalResponse = this;
+    return response.release();
+}
+
+PassRefPtr<FetchResponseData> FetchResponseData::createOpaqueFilteredResponse()
+{
+    // "An opaque filtered response is a filtered response whose type is
+    // |opaque|, status is 0, status message is the empty byte sequence, header
+    // list is an empty list, and body is null."
+    RefPtr<FetchResponseData> response = adoptRef(new FetchResponseData(OpaqueType, 0, ""));
+    response->m_internalResponse = this;
+    return response.release();
+}
+
+void FetchResponseData::populateWebServiceWorkerResponse(blink::WebServiceWorkerResponse& response)
+{
+    if (m_internalResponse) {
+        m_internalResponse->populateWebServiceWorkerResponse(response);
+        return;
+    }
+    response.setURL(url());
+    response.setStatus(status());
+    response.setStatusText(statusMessage());
+    for (size_t i = 0; i < headerList()->size(); ++i) {
+        const FetchHeaderList::Header* header = headerList()->list()[i].get();
+        response.setHeader(header->first, header->second);
+    }
+    response.setBlobDataHandle(blobDataHandle());
+}
+
+FetchResponseData::FetchResponseData(Type type, unsigned short status, AtomicString statusMessage)
+    : m_type(type)
+    , m_status(status)
+    , m_statusMessage(statusMessage)
+    , m_headerList(FetchHeaderList::create())
+{
+}
+
+} // namespace WebCore