Parallel http requests

Question

I have an app that making API requests to the last.fm website using the backgroundWorker. Initially I don\'t know how many request I\'m gonna need to make. The response cont

Answer 1

You can take advantage of HttpClient, assume you have list of urls:

var client = new HttpClient();
var tasks = urls.Select(url => client.GetAsync(url).ContinueWith(t =>
            {
                var response = t.Result;
                response.EnsureSuccessStatusCode();

                //Do something more
            }));

If you use async method, you can await all tasks finish like below:

var results = await Task.WhenAll(tasks);

Answer 2

You can do Async Web Request as well, using BeginGetResponse

      HttpWebRequest webRequest;
      webRequest.BeginGetResponse(new AsyncCallback(callbackfunc), null);


      void callbackfunc(IAsyncResult response)
      {
         webRequest.EndGetResponse(response);
      }