Question

How to effectively check if an HTTP response contains HTML or not in Java? I am making an HTTP connection like shown below:

URL url =  new URL(inputURL);
con = (HttpsURLConnection)url.openConnection(proxy);
con.setRequestMethod(request.getMethod());
con.connect();
con.getResponseCode();

Is there a way to effectively check if the response contains HTML (and not other resources like image,.css or .js files).

Answer 1

You have a method dedicated to this : getContentType

On your HttpsURLConnection, it returns the mime type of the received file.

For an HTML file, it would be “text/html”.

So you can just check :

boolean isHTML = "text/html".equalsIgnoreCase(con.getContentType());