通过webView设置代理实现离线访问
2019-04-04 本文已影响0人
galafan
最近项目遇到一个需求，要在app没有网络的状态下去访问h5，实现app的离线访问，废话不多讲直接上实现原理通过给webView设置代理（Proxy）的方式将webView所有访问地址代理到127.0.01的本地服务上，原理图
image
关键1：给webView设置代理
IProxyCallback.aidl 和 IProxyPortListener.aidl 文件；
创建 IProxyCallback.aidl如下：
interfaceIProxyCallback
{
oneway voidgetProxyPort(IBinder callback);
}
创建IProxyPortListener.aidl 如下：
interfaceIProxyPortListener
{
oneway voidsetProxyPort(intport);
}
设置代理
package com.mobisoft.mbswebplugin.proxy.server;
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 com.tencent.smtt.sdk.WebView;
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 java.util.Properties;
/**
* Author：Created by fan.xd on 2017/1/18.
* Email：fang.xd@mobisoft.com.cn
* Description：设置代理
*/
public class SettingProxy {
private static final String LOG_TAG = "halfman";
private static final String APPLICATION_NAME = "android.app.Application";
// 注意这里applicationClassName 传递的是 application 的类名
public static boolean setProxy(WebView webview, String host, int port, String applicationClassName) {
// 3.2 (HC) or lower
if (Build.VERSION.SDK_INT <= 13) {
// return setProxyUpToHC(webview, host, port);
return false;
}
// 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);
}
}
public static boolean revertBackProxy(WebView webview, String applicationClassName) {
// 3.2 (HC) or lower
if (Build.VERSION.SDK_INT <= 13) {
return true;
}
// ICS: 4.0
else if (Build.VERSION.SDK_INT <= 15) {
return revertProxyICS(webview);
}
// 4.1-4.3 (JB)
else if (Build.VERSION.SDK_INT <= 18) {
return revertProxyJB(webview);
}
// 4.4 (KK) & 5.0 (Lollipop)
else {
return revertProxyKKPlus(webview, 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("com.tencent.smtt.sdk.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;
}
}
private static boolean revertProxyICS(WebView webview) {
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("com.tencent.smtt.sdk.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);
Object o = null;
updateProxyInstance.invoke(sJavaBridge, o);
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("com.tencent.smtt.sdk.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);
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);
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);
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;
}
private static boolean revertProxyJB(WebView webview) {
Log.d(LOG_TAG, "revert proxy with 4.1 - 4.3 API.");
try {
Class wvcClass = Class.forName("android.webkit.WebViewClassic");
Class wvParams[] = new Class[1];
wvParams[0] = Class.forName("com.tencent.smtt.sdk.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);
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);
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);
Object o = null;
updateProxyInstance.invoke(sJavaBridge, o);
} catch (Exception ex) {
Log.e(LOG_TAG, "Setting proxy with >= 4.1 API failed with error: " + ex.getMessage());
return false;
}
Log.d(LOG_TAG, "revert 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."+ applicationClassName);
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);
intent.putExtra("proxyInfo","ssss");
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;
}
@SuppressLint("NewApi")
@SuppressWarnings("all")
private static boolean revertProxyKKPlus(WebView webView, String applicationClassName) {
Context appContext = webView.getContext().getApplicationContext();
Properties properties = System.getProperties();
properties.remove("http.proxyHost");
properties.remove("http.proxyPort");
properties.remove("https.proxyHost");
properties.remove("https.proxyPort");
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);
// intent.putExtra("proxy", null);
onReceiveMethod.invoke(rec, appContext, intent);
}
}
}
Log.d(LOG_TAG, "Revert 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;
}
}
