Android WebView設定PROXY的類別(Android 5實測OK)

2016-05-20 jashliao Comments 0 Comment

Android WebView設定PROXY的類別(Android 5實測OK)

這是版主的前同事提供，有興趣同好歡迎C/P

package com.more.seo;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.http.HttpHost;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.net.Proxy;
import android.os.Build;
import android.util.ArrayMap;
import android.util.Log;
import android.webkit.WebView;

//前同事林 X X 提供
//資料來源:https://stackoverflow.com/questions/19979578/android-webview-set-proxy-programatically-kitkat
/*
呼叫如下
proxy _proxy = new proxy();
_proxy.setProxy( _webView01, “37.187.118.56”, 80, null );
*/
public class proxy {
static String LOG_TAG = “a————-“;

public boolean setProxy(WebView webview, String host, int port, String applicationClassName) {
   applicationClassName = “android.app.Application”;

// 3.2 (HC) or lower
if (Build.VERSION.SDK_INT <= 13) {
return setProxyUpToHC(webview, host, port);
}
// ICS: 4.0
else if (Build.VERSION.SDK_INT <= 15) {
return setProxyICS(webview, host, port);
}
// 4.1-4.3 (JB)
else if (Build.VERSION.SDK_INT <= 18) {
return setProxyJB(webview, host, port);
}
// 4.4 (KK) & 5.0 (Lollipop)
else {
return setProxyKKPlus(webview, host, port, applicationClassName);
}
}

/**
* Set Proxy for Android 3.2 and below.
*/
@SuppressWarnings(“all”)
private static boolean setProxyUpToHC(WebView webview, String host, int port) {
Log.d(LOG_TAG, “Setting proxy with <= 3.2 API.”);

HttpHost proxyServer = new HttpHost(host, port);
// Getting network
Class networkClass = null;
Object network = null;
try {
networkClass = Class.forName(“android.webkit.Network”);
if (networkClass == null) {
Log.e(LOG_TAG, “failed to get class for android.webkit.Network”);
return false;
}
Method getInstanceMethod = networkClass.getMethod(“getInstance”, Context.class);
if (getInstanceMethod == null) {
Log.e(LOG_TAG, “failed to get getInstance method”);
}
network = getInstanceMethod.invoke(networkClass, new Object[]{webview.getContext()});
} catch (Exception ex) {
Log.e(LOG_TAG, “error getting network: ” + ex);
return false;
}
if (network == null) {
Log.e(LOG_TAG, “error getting network: network is null”);
return false;
}
Object requestQueue = null;
try {
Field requestQueueField = networkClass
.getDeclaredField(“mRequestQueue”);
requestQueue = getFieldValueSafely(requestQueueField, network);
} catch (Exception ex) {
Log.e(LOG_TAG, “error getting field value”);
return false;
}
if (requestQueue == null) {
Log.e(LOG_TAG, “Request queue is null”);
return false;
}
Field proxyHostField = null;
try {
Class requestQueueClass = Class.forName(“android.net.http.RequestQueue”);
proxyHostField = requestQueueClass
.getDeclaredField(“mProxyHost”);
} catch (Exception ex) {
Log.e(LOG_TAG, “error getting proxy host field”);
return false;
}

boolean temp = proxyHostField.isAccessible();
try {
proxyHostField.setAccessible(true);
proxyHostField.set(requestQueue, proxyServer);
} catch (Exception ex) {
Log.e(LOG_TAG, “error setting proxy host”);
} finally {
proxyHostField.setAccessible(temp);
}

Log.d(LOG_TAG, “Setting proxy with <= 3.2 API successful!”);
return true;
}

@SuppressWarnings(“all”)
private static boolean setProxyICS(WebView webview, String host, int port) {
try
{
Log.d(LOG_TAG, “Setting proxy with 4.0 API.”);

Class jwcjb = Class.forName(“android.webkit.JWebCoreJavaBridge”);
Class params[] = new Class[1];
params[0] = Class.forName(“android.net.ProxyProperties”);
Method updateProxyInstance = jwcjb.getDeclaredMethod(“updateProxy”, params);

Class wv = Class.forName(“android.webkit.WebView”);
Field mWebViewCoreField = wv.getDeclaredField(“mWebViewCore”);
Object mWebViewCoreFieldInstance = getFieldValueSafely(mWebViewCoreField, webview);

Class wvc = Class.forName(“android.webkit.WebViewCore”);
Field mBrowserFrameField = wvc.getDeclaredField(“mBrowserFrame”);
Object mBrowserFrame = getFieldValueSafely(mBrowserFrameField, mWebViewCoreFieldInstance);

Class bf = Class.forName(“android.webkit.BrowserFrame”);
Field sJavaBridgeField = bf.getDeclaredField(“sJavaBridge”);
Object sJavaBridge = getFieldValueSafely(sJavaBridgeField, mBrowserFrame);

Class ppclass = Class.forName(“android.net.ProxyProperties”);
Class pparams[] = new Class[3];
pparams[0] = String.class;
pparams[1] = int.class;
pparams[2] = String.class;
Constructor ppcont = ppclass.getConstructor(pparams);

updateProxyInstance.invoke(sJavaBridge, ppcont.newInstance(host, port, null));

Log.d(LOG_TAG, “Setting proxy with 4.0 API successful!”);
return true;
}
catch (Exception ex)
{
Log.e(LOG_TAG, “failed to set HTTP proxy: ” + ex);
return false;
}
}

/**
* Set Proxy for Android 4.1 – 4.3.
*/
@SuppressWarnings(“all”)
private static boolean setProxyJB(WebView webview, String host, int port) {
Log.d(LOG_TAG, “Setting proxy with 4.1 – 4.3 API.”);

try {
Class wvcClass = Class.forName(“android.webkit.WebViewClassic”);
Class wvParams[] = new Class[1];
wvParams[0] = Class.forName(“android.webkit.WebView”);
Method fromWebView = wvcClass.getDeclaredMethod(“fromWebView”, wvParams);
Object webViewClassic = fromWebView.invoke(null, webview);

Class wv = Class.forName(“android.webkit.WebViewClassic”);
Field mWebViewCoreField = wv.getDeclaredField(“mWebViewCore”);
Object mWebViewCoreFieldInstance = getFieldValueSafely(mWebViewCoreField, webViewClassic);

updateProxyInstance.invoke(sJavaBridge, ppcont.newInstance(host, port, null));
} catch (Exception ex) {
Log.e(LOG_TAG,”Setting proxy with >= 4.1 API failed with error: ” + ex.getMessage());
return false;
}

Log.d(LOG_TAG, “Setting proxy with 4.1 – 4.3 API successful!”);
return true;
}

// from https://stackoverflow.com/questions/19979578/android-webview-set-proxy-programatically-kitkat
@SuppressLint(“NewApi”)
@SuppressWarnings(“all”)
private static boolean setProxyKKPlus(WebView webView, String host, int port, String applicationClassName) {
Log.d(LOG_TAG, “Setting proxy with >= 4.4 API.”);

Context appContext = webView.getContext().getApplicationContext();
System.setProperty(“http.proxyHost”, host);
System.setProperty(“http.proxyPort”, port + “”);
System.setProperty(“https.proxyHost”, host);
System.setProperty(“https.proxyPort”, port + “”);
try {
Class applictionCls = Class.forName(applicationClassName);
Field loadedApkField = applictionCls.getField(“mLoadedApk”);
loadedApkField.setAccessible(true);
Object loadedApk = loadedApkField.get(appContext);
Class loadedApkCls = Class.forName(“android.app.LoadedApk”);
Field receiversField = loadedApkCls.getDeclaredField(“mReceivers”);
receiversField.setAccessible(true);
ArrayMap receivers = (ArrayMap) receiversField.get(loadedApk);
for (Object receiverMap : receivers.values()) {
for (Object rec : ((ArrayMap) receiverMap).keySet()) {
Class clazz = rec.getClass();
if (clazz.getName().contains(“ProxyChangeListener”)) {
Method onReceiveMethod = clazz.getDeclaredMethod(“onReceive”, Context.class, Intent.class);
Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);

onReceiveMethod.invoke(rec, appContext, intent);
}
}
}

Log.d(LOG_TAG, “Setting proxy with >= 4.4 API successful!”);
return true;
} catch (ClassNotFoundException e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
Log.v(LOG_TAG, e.getMessage());
Log.v(LOG_TAG, exceptionAsString);
} catch (NoSuchFieldException e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
Log.v(LOG_TAG, e.getMessage());
Log.v(LOG_TAG, exceptionAsString);
} catch (IllegalAccessException e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
Log.v(LOG_TAG, e.getMessage());
Log.v(LOG_TAG, exceptionAsString);
} catch (IllegalArgumentException e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
Log.v(LOG_TAG, e.getMessage());
Log.v(LOG_TAG, exceptionAsString);
} catch (NoSuchMethodException e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
Log.v(LOG_TAG, e.getMessage());
Log.v(LOG_TAG, exceptionAsString);
} catch (InvocationTargetException e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
Log.v(LOG_TAG, e.getMessage());
Log.v(LOG_TAG, exceptionAsString);
}
return false;
}

private static Object getFieldValueSafely(Field field, Object classInstance) throws IllegalArgumentException, IllegalAccessException {
boolean oldAccessibleValue = field.isAccessible();
field.setAccessible(true);
Object result = field.get(classInstance);
field.setAccessible(oldAccessibleValue);
return result;
}

}