android - 如何获取 webview 响应 header ？

Question

我想监听 webview header 并获取 response header，可以吗？

我试过这个方法，但这只给我请求头

myWebView.setWebViewClient(new WebViewClient() {

@Override
        @TargetApi(Build.VERSION_CODES.LOLLIPOP)
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            Log.v("USERAGENTBROWSE", "shouldOverrideUrlLoading api >= 21 called");

            //some code

            return true;
        }

@Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            Log.v("USERAGENTBROWSE", "shouldOverrideUrlLoading api < 21 called");

            //some code

            return true;
        }});

Answer 1

使用下面的代码

private WebView webview;
public void onCreate(Bundle icicle){
    // bla bla bla

    // here you initialize your webview
    webview = new WebView(this);
    webview.setWebViewClient(new YourWebClient());
}

// this will be the webclient that will manage the webview
private class YourWebClient extends WebViewClient{

    // you want to catch when an URL is going to be loaded
    public boolean  shouldOverrideUrlLoading  (WebView  view, String  urlConection){
        // here you will use the url to access the headers.
        // in this case, the Content-Length one
        URL url;
        URLConnection conexion;
        try {
            url = new URL(urlConection);
            conexion = url.openConnection();
            conexion.setConnectTimeout(3000);
            conexion.connect();
            // get the size of the file which is in the header of the request
            int size = conexion.getContentLength();
        }


        // and here, if you want, you can load the page normally
        String htmlContent = "";
        HttpGet httpGet = new HttpGet(urlConection);
        // this receives the response
        HttpResponse response;
        try {
            response = httpClient.execute(httpGet);
            if (response.getStatusLine().getStatusCode() == 200) {
                // la conexion fue establecida, obtener el contenido
                HttpEntity entity = response.getEntity();
                if (entity != null) {
                    InputStream inputStream = entity.getContent();
                    htmlContent = convertToString(inputStream);
                }
            }
         } catch (Exception e) {}

         webview.loadData(htmlContent, "text/html", "utf-8");
         return true;
    }

    public String convertToString(InputStream inputStream){
        StringBuffer string = new StringBuffer();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
        String line;
        try {
            while ((line = reader.readLine()) != null) {
                string.append(linea + "\n");
            }
        } catch (IOException e) {}
        return string.toString();
    }
}

归功于 Cristian