问题
I need to load some url in WebView that is unavailable in one country, so I tried to use a proxy with WebView. I've found one solution on SO (https://stackoverflow.com/a/18453384/7478869), and it works with proxy without authentication. But I need to set the proxy with user and password.
Some approaches, that didn't help:
1) Load url with headers
class ProxyAuthWebViewClient extends WebViewClient {
String proxyUserName;
String proxyPassword;
public ProxyAuthWebViewClient(String proxyUserName, String proxyPassword){
this.proxyUserName = proxyUserName;
this.proxyPassword = proxyPassword;
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
loadUrl(view, url, proxyUserName, proxyPassword);
return true ;
}
}
public void loadUrl(WebView view, String url, String proxyUserName, String proxyPassword){
UsernamePasswordCredentials creds= new UsernamePasswordCredentials(proxyUserName, proxyPassword);
Header credHeader = BasicScheme.authenticate(creds, "UTF-8", true);
Map<String, String> header = new HashMap<String, String>();
header.put(credHeader.getName(), credHeader.getValue());
view.loadUrl(url, header);
}
2) Add password and user in setProxy method (full code below):
Authenticator.setDefault(
new Authenticator() {
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
user, password.toCharArray());
}
}
);
System.setProperty("http.proxyUser", user);
System.setProperty("http.proxyPassword", password);
System.setProperty("https.proxyUser", user);
System.setProperty("https.proxyPassword", password );
But I am still getting this error
[WARNING:http_network_transaction.cc(339)] Blocked proxy response with status 407 to CONNECT request for example.com:443
And in WebView: ERR_TUNNEL_CONNECTION_FAILED
Full code:
public class MainActivity extends AppCompatActivity {
public static final String LOG_TAG = "Main";
WebView webview;
String applicationClassName="android.app.Application";
String user = "web";
String password = "password";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webview = findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
String databasePath = webview.getContext().getApplicationContext().getDir("database", Context.MODE_PRIVATE).getPath();
webview.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
webview.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
webview.getSettings().setDatabaseEnabled(true);
webview.getSettings().setDatabasePath(databasePath);
webview.getSettings().setAppCacheMaxSize(5 * 1048576);
webview.getSettings().setAppCachePath(databasePath);
webview.getSettings().setAppCacheEnabled(true);
webview.getSettings().setLoadWithOverviewMode(true);
webview.getSettings().setDomStorageEnabled(true);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NORMAL);
setProxy(webview, "85.10.195.100", 443, applicationClassName, user, password);
webview.setWebViewClient(new ProxyAuthWebViewClient(user,password));
loadUrl(webview,"https://example.com",user,password);
}
class ProxyAuthWebViewClient extends WebViewClient {
String proxyUserName;
String proxyPassword;
public ProxyAuthWebViewClient(String proxyUserName, String proxyPassword){
this.proxyUserName = proxyUserName;
this.proxyPassword = proxyPassword;
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
loadUrl(view, url, proxyUserName, proxyPassword);
return true ;
}
}
public void loadUrl(WebView view, String url, String proxyUserName, String proxyPassword){
UsernamePasswordCredentials creds= new UsernamePasswordCredentials(proxyUserName, proxyPassword);
Header credHeader = BasicScheme.authenticate(creds, "UTF-8", true);
Map<String, String> header = new HashMap<String, String>();
header.put(credHeader.getName(), credHeader.getValue());
view.loadUrl(url, header);
}
public static boolean setProxy(WebView webview, String host, int port, String applicationClassName, String user,
String password) {
return setProxyKKPlus(webview, host, port, user, password, applicationClassName);
}
// 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, final String user,
final String password, 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 + "");
Authenticator.setDefault(
new Authenticator() {
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
user, password.toCharArray());
}
}
);
System.setProperty("http.proxyUser", user);
System.setProperty("http.proxyPassword", password);
System.setProperty("https.proxyUser", user);
System.setProperty("https.proxyPassword", password );
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;
}
}
How to use a proxy with authentication in WebView properly?
回答1:
Ok, so I Found the answer. Need to add onReceivedHttpAuthRequest in WebViewClient
@Override
public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
handler.proceed(user,password);
}
来源：https://stackoverflow.com/questions/54957724/using-webview-and-proxy-with-authentication