Change Redirect Policy of Volley Framework

Question

I am using the Volley framework in a project where I always need to handle the redirects myself to handle the headers.

How redirects are handled depends right now o

Answer 1

If you don't care about old APIs (< 9) and you just want volley stop following redirects you can do

RequestQueue requestQueue = Volley.newRequestQueue(context, new HurlStack() {
    @Override
    protected HttpURLConnection createConnection(URL url) throws IOException {
        HttpURLConnection connection = super.createConnection(url);
        connection.setInstanceFollowRedirects(false);

        return connection;
    }
});

Answer 2

Try on more call with the Location value from the network response headers

Kotlin Implementation

fun fetchRemoteList(
    url: String,
    context: Context,
    callback: OnFetchListCompleted,
    firstTry: Boolean = true
) {
    val queue = Volley.newRequestQueue(context)
    val stringRequest = StringRequest(
        Request.Method.GET, url,
        Response.Listener { response ->
            GlobalScope.launch {
                callback.fetchListSucceed()
            }
        },
        Response.ErrorListener { error ->
            val locationRedirectUrl: String? = error?.networkResponse?.headers?.get("Location")

            if (firstTry && !locationRedirectUrl.isNullOrEmpty()) {
                fetchRemoteList(locationRedirectUrl, context, callback, false)
            } else {
                callback.fetchListFailed(error?.message ?: "")
            }
        })

    queue.add(stringRequest)
}

Answer 3

This solution doesn't require another framework:

Volley uses AndroidHTTPClient or Apache (if SDK level is 8 and under) by default. You could override / inherit the changes you want for redirection in these classes and create a custom HttpStack with them, feeding it to the Volley.newRequestQueue().

EDIT:

Assuming the very long named custom HttpStack implementations are yours:

HttpStack stack;
if (Build.VERSION.SDK_INT >= 9) {
    stack = new RedirectionHurlStack();
} else {
    stack = new RedirectionHttpClientStack();
}

sRequestQueue = Volley.newRequestQueue(context, stack);

Answer 4

I think A HttpStack implementation for Volley that uses OkHttp as its transport is the best solution

RequestQueue queue = Volley.newRequestQueue(this);

Network network = new BasicNetwork(new OkHttpStack());
RequestQueue queue = new RequestQueue(new DiskBasedCache(new File(getCacheDir(), "volley")), network);
queue.start();

OkHttpStack class:

public class OkHttpStack extends HurlStack {
private final OkHttpClient client;

public OkHttpStack() {
this(new OkHttpClient());
}

public OkHttpStack(OkHttpClient client) {
if (client == null) {
throw new NullPointerException("Client must not be null.");
}
this.client = client;
}

@Override protected HttpURLConnection createConnection(URL url) throws IOException {
return client.open(url);
}
}

Update: if you are using new version of okhttp stack then use

public class OkHttpStack extends HurlStack {
    private final OkUrlFactory mFactory;

    public OkHttpStack() {
        this(new OkHttpClient());
    }

    public OkHttpStack(OkHttpClient client) {
        if (client == null) {
            throw new NullPointerException("Client must not be null.");
        }
        mFactory = new OkUrlFactory(client);
    }

    @Override
    protected HttpURLConnection createConnection(URL url) throws IOException {
       return mFactory.open(url);
    }
}