How to use HttpClient without async

Question

Hello I'm following to this guide

static async Task<Product> GetProductAsync(string path)
{
    Product product = null;
    HttpResponseMessage response = await client.GetAsync(path);
    if (response.IsSuccessStatusCode)
    {
        product = await response.Content.ReadAsAsync<Product>();
    }
    return product;
}

I use this example on my code and I want to know is there any way to use HttpClient without async/await and how can I get only string of response?

Thank you in advance

you can refer this : http://stackoverflow.com/questions/31129873/make-http-client-synchronous-wait-for-response — Sunil Kumar, Oct 24 '16 at 13:58
Why not `WebClient.DownloadString` instead of twisting `HttpClient` in ways it isn't meant to be used? — spender, Oct 24 '16 at 14:02

Stephen Cleary · Answer 1 · 2018-08-09T19:42:55.187

35

is there any way to use HttpClient without async/await and how can I get only string of response?

HttpClient was specifically designed for asynchronous use.

If you want to synchronously download a string, use WebClient.DownloadString.

edited Aug 09 '18 at 19:42

answered Oct 24 '16 at 13:55

Stephen Cleary

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Hah! I just left a comment to this end. The right answer. – spender Oct 24 '16 at 14:03
Thanks but I just following to the guide that I specified in the question – Kumar J. Oct 25 '16 at 17:44
4

@KumarJ.: Part of following a guide is knowing what needs to be changed. – Stephen Cleary Oct 25 '16 at 18:28
This should be marked as the correct answer. Came across this myself. – Westley Bennett Aug 18 '21 at 15:57
2

Interestingly, I recently learned (5 years after this answer) that [`HttpClient` has a synchronous API as of .NET 5](https://learn.microsoft.com/en-us/dotnet/api/system.net.http.httpclient.send?view=net-5.0). – Stephen Cleary Aug 18 '21 at 16:59

Roman Marusyk · Accepted Answer · 2019-08-04T22:27:10.963

13

Of course you can:

public static string Method(string path)
{
   using (var client = new HttpClient())
   {
       var response = client.GetAsync(path).GetAwaiter().GetResult();
       if (response.IsSuccessStatusCode)
       {
            var responseContent = response.Content;
            return responseContent.ReadAsStringAsync().GetAwaiter().GetResult();
        }
    }
 }

but as @MarcinJuraszek said:

"That may cause deadlocks in ASP.NET and WinForms. Using .Result or .Wait() with TPL should be done with caution".

Here is the example with WebClient.DownloadString

using (var client = new WebClient())
{
    string response = client.DownloadString(path);
    if (!string.IsNullOrEmpty(response))
    {
       ...
    }
}

edited Aug 04 '19 at 22:27

answered Oct 23 '16 at 23:02

Roman Marusyk

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6

Just FYI: That may cause deadlocks in ASP.NET and WinForms. Using `.Result` or `.Wait()` with TPL should be done with caution. – MarcinJuraszek Oct 23 '16 at 23:11
2

See this for info about deadlocking https://stackoverflow.com/questions/32195595/avoiding-deadlock-with-httpclient – Simon_Weaver Nov 16 '17 at 06:06

How to use HttpClient without async

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