Add custom headers coming from android webview

Question

I need to add custom headers to EVERY request coming from the WebView. I know loadURL has the parameter for adding extra Headers, but those are only applied to only some of the requests. All (resource related) requests do not contain the headers. I have looked at all overrides in WebViewClient, but nothing allows for adding headers to resource requests - onLoadResource(WebView view, String url) and shouldInterceptRequest(Webview,url). Any help would be wonderful.

Answer 1

shouldInterceptRequest(Webview,url) can help you to intercept every request of a site, such as JavaScript, CSS, Image. Then inside shouldInterceptRequest(Webview,url) you can use the parameter url to initial new http request by using HttpClient and HttpPOST, here is example code :

DefaultHttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(<"your url for each request">);
httpPost.setHeader("<header-name>", "<header-value>");
HttpReponse httpResponse = client.execute(httpPost);

//here omit getting content-type and encoding

InputStream reponseInputStream = httpReponse.getEntity().getContent();

Then you can put responseInputStream to return WebResourceResponse(<content-type>, <encoding>, reponseInputStream) in your shouldInterceptRequest(Webview,url)

if you have any request which doesn't need add more header, just filter it and return null, shouldInterceptRequest(Webview,url) will do the rest.

Hope this can help.