android_webview/java/src/org/chromium/android_webview/AwContentsIoThreadClient.java

// Copyright 2012 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.

package org.chromium.android_webview;

import org.chromium.base.annotations.CalledByNative;
import org.chromium.base.annotations.JNINamespace;

import java.util.HashMap;
import java.util.Map;

/**
 * Delegate for handling callbacks. All methods are called on the IO thread.
 *
 * You should create a separate instance for every WebContents that requires the
 * provided functionality.
 */
@JNINamespace("android_webview")
public abstract class AwContentsIoThreadClient {
    @CalledByNative
    public abstract int getCacheMode();

    @CalledByNative
    public abstract boolean shouldBlockContentUrls();

    @CalledByNative
    public abstract boolean shouldBlockFileUrls();

    @CalledByNative
    public abstract boolean shouldBlockNetworkLoads();

    @CalledByNative
    public abstract boolean shouldAcceptThirdPartyCookies();

    @CalledByNative
    public abstract void onDownloadStart(String url, String userAgent,
            String contentDisposition, String mimeType, long contentLength);

    @CalledByNative
    public abstract void newLoginRequest(String realm, String account, String args);

    @CalledByNative
    public abstract AwContentsBackgroundThreadClient getBackgroundThreadClient();

    public abstract void onReceivedError(AwContentsClient.AwWebResourceRequest request,
            AwContentsClient.AwWebResourceError error);

    public abstract void onReceivedHttpError(AwContentsClient.AwWebResourceRequest request,
            AwWebResourceResponse response);

    // Protected methods ---------------------------------------------------------------------------

    @CalledByNative
    protected void onReceivedError(
            // WebResourceRequest
            String url, boolean isMainFrame, boolean hasUserGesture, String method,
            String[] requestHeaderNames, String[] requestHeaderValues,
            // WebResourceError
            int errorCode, String description) {
        AwContentsClient.AwWebResourceRequest request =
                new AwContentsClient.AwWebResourceRequest();
        request.url = url;
        request.isMainFrame = isMainFrame;
        request.hasUserGesture = hasUserGesture;
        request.method = method;
        request.requestHeaders = new HashMap<String, String>(requestHeaderNames.length);
        for (int i = 0; i < requestHeaderNames.length; ++i) {
            request.requestHeaders.put(requestHeaderNames[i], requestHeaderValues[i]);
        }
        AwContentsClient.AwWebResourceError error = new AwContentsClient.AwWebResourceError();
        error.errorCode = errorCode;
        error.description = description;
        onReceivedError(request, error);
    }

    @CalledByNative
    protected void onReceivedHttpError(
            // WebResourceRequest
            String url, boolean isMainFrame, boolean hasUserGesture, String method,
            String[] requestHeaderNames, String[] requestHeaderValues,
            // WebResourceResponse
            String mimeType, String encoding, int statusCode, String reasonPhrase,
            String[] responseHeaderNames, String[] responseHeaderValues) {
        AwContentsClient.AwWebResourceRequest request =
                new AwContentsClient.AwWebResourceRequest();
        request.url = url;
        request.isMainFrame = isMainFrame;
        request.hasUserGesture = hasUserGesture;
        request.method = method;
        request.requestHeaders = new HashMap<String, String>(requestHeaderNames.length);
        for (int i = 0; i < requestHeaderNames.length; ++i) {
            request.requestHeaders.put(requestHeaderNames[i], requestHeaderValues[i]);
        }
        Map<String, String> responseHeaders =
                new HashMap<String, String>(responseHeaderNames.length);
        // Note that we receive un-coalesced response header lines, thus we need to combine
        // values for the same header.
        for (int i = 0; i < responseHeaderNames.length; ++i) {
            if (!responseHeaders.containsKey(responseHeaderNames[i])) {
                responseHeaders.put(responseHeaderNames[i], responseHeaderValues[i]);
            } else if (!responseHeaderValues[i].isEmpty()) {
                String currentValue = responseHeaders.get(responseHeaderNames[i]);
                if (!currentValue.isEmpty()) {
                    currentValue += ", ";
                }
                responseHeaders.put(responseHeaderNames[i], currentValue + responseHeaderValues[i]);
            }
        }
        AwWebResourceResponse response = new AwWebResourceResponse(
                mimeType, encoding, null, statusCode, reasonPhrase, responseHeaders);
        onReceivedHttpError(request, response);
    }
}