Retrofit get a parameter from a redirect URL

Question

I am using Retrofit.

I have an endpoint that redirects to another endpoint. The latter (the endpoint that I end up at) has a parameter in its URL that I need. What is the best way to get the value of this parameter?

I cannot even figure out how to get the URL that I am redirected to, using Retrofit.

Answer 1

OkHttp's Response will give you the wire-level request (https://square.github.io/okhttp/3.x/okhttp/okhttp3/Response.html#request--). This will be the Request that initiated the Response from the redirect. The Request will give you its HttpUrl, and HttpUrl can give you its parameters' keys and values, paths, etc.

With Retrofit 2, simply use retrofit2.Response.raw() to get the okhttp3.Response and follow the above.

Answer 2

I am using retrofit. And I can get the redirect url following this way :

private boolean handleRedirectUrl(RetrofitError cause) {
    if (cause != null && cause.getResponse() != null) {
        List<Header> headers = cause.getResponse().getHeaders();
        for (Header header : headers) {
             //KEY_HEADER_REDIRECT_LOCATION = "Location"
            if (KEY_HEADER_REDIRECT_LOCATION.equals(header.getName())) {
                String redirectUrl = header.getValue();

                return true;
            }
        }
    }

    return false;
}

Hope it could help someone.