Using await Task<T> async hangs controller in MVC app

Question

I have two MVC websites. Site 1 has a controller that calls Site 2 with the following code

 //  If I remove this in the controller of site1, then execution continues....
 var asdf =   SharedTypes.Utilities.GetjsonStream("http://localhost:11541/UIDP/Details/a1?format=json");
 string g =  asdf.Result;


public class Utilities
{
    public static async Task<string> GetjsonStream(string url)
    {
        HttpClient client = new HttpClient();
        HttpResponseMessage response = await client.GetAsync(url);
        string content = await response.Content.ReadAsStringAsync();
        Debug.WriteLine("Content: " + content);
        return content;
    }
}

I'm able to directly browse the URL and see the JSON.. but what is the correct way to download JSON from my peer website in MVC?

Tim S. · Accepted Answer · 2013-11-26 20:49:30Z

2

You should probably turn the controller method into an async method and use await to avoid deadlocks.

public async Task<ActionResult> MyActionAsync()
{
    var asdf = SharedTypes.Utilities.GetjsonStream(someUrl);
    string g = await asdf;
    // return something
}

Microsoft's ASP.NET tutorial includes a page on async methods in ASP.NET MVC 4.

edited Nov 26, 2013 at 20:49

answered Nov 26, 2013 at 20:44

Tim S.

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1 Comment

makerofthings7 Over a year ago

This seems to work well for one project calling another... but I couldn't get it to work for a MVC app to use HTTPWebRequest to call itself. It was probably unneeded overhead anyway. This is great for the two sites communicating with each other ...

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