在Android WebView中防止跨站脚本攻击(XSS)可以采取以下措施:
WebView webView = findViewById(R.id.webview);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
shouldInterceptRequest
方法过滤恶意资源:通过重写shouldInterceptRequest
方法,可以拦截WebView加载的资源,检查其内容是否包含恶意脚本,并进行相应的处理,如删除或替换。webView.setWebViewClient(new WebViewClient() {
@Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
String url = request.getUrl().toString();
// 检查URL是否包含恶意资源,如包含<script>标签等
if (isMalicious(url)) {
// 返回一个空的响应,阻止加载恶意资源
return new WebResourceResponse("text/plain", "utf-8", new ByteArrayInputStream("".getBytes()));
}
return super.shouldInterceptRequest(view, request);
}
});
String htmlContent = "<html><head></head><body><script>alert('XSS');</script></body></html>";
HtmlCompat.fromHtml(htmlContent, HtmlCompat.FROM_HTML_MODE_LEGACY).toString();
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
cookieManager.setAcceptThirdPartyCookies(webView, true);
cookieManager.setHttpOnlyCookiesForDomain("example.com", true);
// 获取默认的TrustManager
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
trustManagerFactory.init((KeyStore) null);
// 创建SSLSocketFactory,使用自定义的TrustManager
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, trustManagerFactory.getTrustManagers(), new SecureRandom());
// 设置WebView的SSLSocketFactory
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
// 接受所有证书,用于测试目的
handler.proceed();
}
});
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new WebViewClient());
webView.setSSLSocketFactory(sslContext.getSocketFactory());
通过采取这些措施,可以有效地防止Android WebView中的跨站脚本攻击。