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c#xamarinasync-awaittaskhttpclient
LittleFunny
LittleFunny

Reputation: 8375

Receiving TaskCanceledException when making http request

I received System.Threading.Tasks.TaskCanceledException when making Http request.

public async Task<CommonResult<T>> GetRequest<T>(TokenModel token, string url)
{
    using (var client = new HttpClient())
    {
        client.MaxResponseContentBufferSize = int.MaxValue;
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(token.TokenType, token.AccessToken);

        var response = await client.GetAsync(url);

        if (response.IsSuccessStatusCode)
        {
            return await OK<T>(response);
        }
        else
        {
            //The response is authorized but some other error.
            if (IsAuthorized(response.StatusCode))
                return Error<T>(response.StatusCode.ToString());

            //Unable to refresh token.
            if (!await RenewToken(token))
                return Error<T>("Fail to refresh token");

            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(GlobalData.Token.TokenType, GlobalData.Token.AccessToken);
            response = await client.GetAsync(url);

            if (response.IsSuccessStatusCode)
            {
                return await OK<T>(response);
            }
            else
            {
                return Error<T>(response.StatusCode.ToString());
            }
        }
    }
}

It happens when I debug the server code and not continue. Is this natural behaviour or am I missing something in the client code?

Upvotes: 0

Views: 2663

Answers (1)

Plac3Hold3r
Plac3Hold3r

Reputation: 5182

This is expected behaviour as by default HttpClient sets a timeout of 100 seconds.

HttpClient Timeout

You can adjust on your HttpClient and set a custom timeout duration. For example you can set an InfiniteTimeSpan to prevent timeouts from occuring.

client.Timeout = Timeout.InfiniteTimeSpan;

HttpClient Request Timeout

You can additionally define a timeout per request using a CancellationTokenSource 

using (var cts = new CancellationTokenSource(Timeout.InfiniteTimeSpan))
{
    await client.GetAsync(url, cts.Token).ConfigureAwait(false);
}

Upvotes: 4

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