C++ WebURLResponse::isNull方法代码示例

void ResourceLoader::didReceiveResponse(
    const WebURLResponse& response,
    std::unique_ptr<WebDataConsumerHandle> handle) {
  DCHECK(!response.isNull());
  m_fetcher->didReceiveResponse(m_resource.get(), response.toResourceResponse(),
                                std::move(handle));
}

void ResourceHandleInternal::willSendRequest(
    WebURLLoader*, WebURLRequest& request, const WebURLResponse& response)
{
    ASSERT(m_client);
    ASSERT(!request.isNull());
    ASSERT(!response.isNull());
    m_client->willSendRequest(m_owner, request.toMutableResourceRequest(), response.toResourceResponse());
}

void printResponseDescription(WebTestDelegate* delegate, const WebURLResponse& response)
{
    if (response.isNull()) {
        delegate->printMessage("(null)");
        return;
    }
    string url = response.url().spec();
    char data[100];
    snprintf(data, sizeof(data), "%d", response. httpStatusCode());
    delegate->printMessage(string("<NSURLResponse ") + descriptionSuitableForTestResult(url) + ", http status code " + data + ">");
}

void ResourceHandleInternal::didReceiveResponse(WebURLLoader*, const WebURLResponse& response)
{
    ASSERT(m_client);
    ASSERT(!response.isNull());
    bool isMultipart = response.isMultipartPayload();
    bool isValidStateTransition = (m_state == ConnectionStateStarted || m_state == ConnectionStateReceivedResponse);
    // In the case of multipart loads, calls to didReceiveData & didReceiveResponse can be interleaved.
    if (!isMultipart && !isValidStateTransition)
        CRASH();
    m_state = ConnectionStateReceivedResponse;
    m_client->didReceiveResponse(m_owner, response.toResourceResponse());
}

void WebViewHost::willSendRequest(WebFrame*, unsigned identifier, WebURLRequest& request, const WebURLResponse& redirectResponse)
{
    // Need to use GURL for host() and SchemeIs()
    GURL url = request.url();
    string requestURL = url.possibly_invalid_spec();

    if (layoutTestController()->shouldDumpResourceLoadCallbacks()) {
        GURL mainDocumentURL = request.firstPartyForCookies();
        printResourceDescription(identifier);
        printf(" - willSendRequest <NSURLRequest URL %s, main document URL %s,"
               " http method %s> redirectResponse ",
               descriptionSuitableForTestResult(requestURL).c_str(),
               URLDescription(mainDocumentURL).c_str(),
               request.httpMethod().utf8().data());
        printResponseDescription(redirectResponse);
        fputs("\n", stdout);
    }

    if (!redirectResponse.isNull() && m_blocksRedirects) {
        fputs("Returning null for this redirect\n", stdout);
        // To block the request, we set its URL to an empty one.
        request.setURL(WebURL());
        return;
    }

    if (m_requestReturnNull) {
        // To block the request, we set its URL to an empty one.
        request.setURL(WebURL());
        return;
    }

    string host = url.host();
    // 255.255.255.255 is used in some tests that expect to get back an error.
    if (!host.empty() && (url.SchemeIs("http") || url.SchemeIs("https"))
        && host != "127.0.0.1"
        && host != "255.255.255.255"
        && host != "localhost"
        && !m_shell->allowExternalPages()) {
        printf("Blocked access to external URL %s\n", requestURL.c_str());

        // To block the request, we set its URL to an empty one.
        request.setURL(WebURL());
        return;
    }

    HashSet<String>::const_iterator end = m_clearHeaders.end();
    for (HashSet<String>::const_iterator header = m_clearHeaders.begin(); header != end; ++header)
        request.clearHTTPHeaderField(WebString(header->characters(), header->length()));

    // Set the new substituted URL.
    request.setURL(webkit_support::RewriteLayoutTestsURL(request.url().spec()));
}

bool ResourceLoader::willFollowRedirect(
    WebURLRequest& passedNewRequest,
    const WebURLResponse& passedRedirectResponse) {
  DCHECK(!passedNewRequest.isNull());
  DCHECK(!passedRedirectResponse.isNull());

  if (m_isCacheAwareLoadingActivated) {
    // Fail as cache miss if cached response is a redirect.
    didFail(
        ResourceError::cacheMissError(m_resource->lastResourceRequest().url()));
    return false;
  }

  ResourceRequest& newRequest(passedNewRequest.toMutableResourceRequest());
  const ResourceResponse& redirectResponse(
      passedRedirectResponse.toResourceResponse());
  newRequest.setRedirectStatus(
      ResourceRequest::RedirectStatus::FollowedRedirect);

  const KURL originalURL = newRequest.url();

  ResourceRequestBlockedReason blockedReason = m_fetcher->willFollowRedirect(
      m_resource.get(), newRequest, redirectResponse);
  if (blockedReason != ResourceRequestBlockedReason::None) {
    cancelForRedirectAccessCheckError(newRequest.url(), blockedReason);
    return false;
  }

  // ResourceFetcher::willFollowRedirect() may rewrite the URL to
  // something else not for rejecting redirect but for other reasons.
  // E.g. WebFrameTestClient::willSendRequest() and
  // RenderFrameImpl::willSendRequest(). We should reflect the
  // rewriting but currently we cannot. So, return false to make the
  // redirect fail.
  if (newRequest.url() != originalURL) {
    cancelForRedirectAccessCheckError(newRequest.url(),
                                      ResourceRequestBlockedReason::Other);
    return false;
  }

  if (!m_resource->willFollowRedirect(newRequest, redirectResponse)) {
    cancelForRedirectAccessCheckError(newRequest.url(),
                                      ResourceRequestBlockedReason::Other);
    return false;
  }

  return true;
}

void ResourceLoader::didReceiveResponse(WebURLLoader*, const WebURLResponse& response, WebDataConsumerHandle* rawHandle)
{
    ASSERT(!response.isNull());
    ASSERT(m_state == Initialized);
    // |rawHandle|'s ownership is transferred to the callee.
    OwnPtr<WebDataConsumerHandle> handle = adoptPtr(rawHandle);

    bool isMultipartPayload = response.isMultipartPayload();
    bool isValidStateTransition = (m_connectionState == ConnectionStateStarted || m_connectionState == ConnectionStateReceivedResponse);
    // In the case of multipart loads, calls to didReceiveData & didReceiveResponse can be interleaved.
    RELEASE_ASSERT(isMultipartPayload || isValidStateTransition);
    m_connectionState = ConnectionStateReceivedResponse;

    const ResourceResponse& resourceResponse = response.toResourceResponse();

    if (responseNeedsAccessControlCheck()) {
        if (response.wasFetchedViaServiceWorker()) {
            if (response.wasFallbackRequiredByServiceWorker()) {
                m_loader->cancel();
                m_loader.clear();
                m_connectionState = ConnectionStateStarted;
                m_loader = adoptPtr(Platform::current()->createURLLoader());
                ASSERT(m_loader);
                ASSERT(!m_request.skipServiceWorker());
                m_request.setSkipServiceWorker(true);
                WrappedResourceRequest wrappedRequest(m_request);
                m_loader->loadAsynchronously(wrappedRequest, this);
                return;
            }
        } else {
            // If the response successfully validated a cached resource, perform
            // the access control with respect to it. Need to do this right here
            // before the resource switches clients over to that validated resource.
            Resource* resource = m_resource;
            if (!resource->isCacheValidator() || resourceResponse.httpStatusCode() != 304)
                m_resource->setResponse(resourceResponse);
            if (!m_fetcher->canAccessResource(resource, m_options.securityOrigin.get(), response.url(), ResourceFetcher::ShouldLogAccessControlErrors)) {
                m_fetcher->didReceiveResponse(m_resource, resourceResponse);
                cancel(ResourceError::cancelledDueToAccessCheckError(KURL(response.url())));
                return;
            }
        }
    }

    m_resource->responseReceived(resourceResponse, handle.release());
    if (m_state == Terminated)
        return;

    m_fetcher->didReceiveResponse(m_resource, resourceResponse);
    if (m_state == Terminated)
        return;

    if (response.toResourceResponse().isMultipart()) {
        // We only support multipart for images, though the image may be loaded
        // as a main resource that we end up displaying through an ImageDocument.
        if (!m_resource->isImage() && m_resource->type() != Resource::MainResource) {
            cancel();
            return;
        }
        m_loadingMultipartContent = true;
    } else if (isMultipartPayload) {
        // Since a subresource loader does not load multipart sections progressively, data was delivered to the loader all at once.
        // After the first multipart section is complete, signal to delegates that this load is "finished"
        m_fetcher->subresourceLoaderFinishedLoadingOnePart(this);
        didFinishLoadingOnePart(0, WebURLLoaderClient::kUnknownEncodedDataLength);
    }
    if (m_state == Terminated)
        return;

    if (m_resource->response().httpStatusCode() < 400 || m_resource->shouldIgnoreHTTPStatusCodeErrors())
        return;
    m_state = Finishing;

    if (!m_notifiedLoadComplete) {
        m_notifiedLoadComplete = true;
        m_fetcher->didFailLoading(m_resource, ResourceError::cancelledError(m_request.url()));
    }

    ASSERT(m_state != Terminated);
    m_resource->error(Resource::LoadError);
    cancel();
}