如何解决C#HttpClient通用SendAysnc无法正常工作
我不熟悉使用C#编写通用方法,并且试图在我的c#项目中创建通用SendAsync
方法。代码如下。
HttpClientHelper.cs
public static async Task<T2t> ExecuteRequest<T1,T2>(T2 request,string url)
{
Uri requestUri = new Uri(url);
string payload = JsonConvert.SerializeObject(request);
HttpContent httpContent = new StringContent(payload,"application/json");
HttpRequestMessage requestMessage = new HttpRequestMessage
{
Method = HttpMethod.Post,RequestUri = requestUri,Content = httpContent
};
return await SendUriAsync<T2>(requestMessage);
}
public static async Task<T> SendUriAsync<T>(HttpRequestMessage requestMessage)
{
string clint_id = "1234";
var clineCred = Encoding.UTF8.GetBytes($"{client_id}");
using(var result = await client.SendAsync(requestMessage))
{
result.EnsureSuccessStatusCode();
var response = await result.Content.ReadAsStringAsync();
if(result.IsSuccessStatusCode && response != null)
{
return JsonConvert.DeserializeObject<T>(response);
}
else
{
return null;
}
}
}
这是调用这些方法的控制器类:
CarSalesController.cs
string thirdpartyUrl = "someurl";
var responseObject = await HttpClientHelper.ExecuteRequest<CarObject,string>(requestObject,thirdpartyUrl);
我在HttpClientHelper
类中遇到错误。错误是:
ResponseStatusCode不指示成功。状态码:401-未经授权
但是当我使用邮递员时,相同的API效果很好。他是cURL
curl --location --request GET'someurl'
--header'client_id:1234'
--header'授权:基本asdf'
--header'Content-Type:application / json'
--data-raw'{
“ data1”:“ somedata1”,
“ data2”:“ somedata2”
}'
我的代码有什么问题?
解决方法
问题可能出在DeserializeObject
上。尝试使用:
response.Content.ReadAsStringAsync()
,
这不是您要做什么吗?
public async Task<TOut> ExecuteRequestAsync<TIn,TOut>( TIn request,string url )
{
var requestUri = new Uri( url );
var payload = JsonConvert.SerializeObject( request );
var httpContent = new StringContent( payload,Encoding.UTF8,"application/json" );
var requestMessage = new HttpRequestMessage()
{
Method = HttpMethod.Post,RequestUri = requestUri,Content = httpContent
};
return await SendUriAsync<TOut>( requestMessage );
}
public static async Task<T> SendUriAsync<T>( HttpRequestMessage requestMessage )
{
using (var client = CreateClient( 1234 ))
{
var result = await client.SendAsync( requestMessage );
result.EnsureSuccessStatusCode();
var response = await result.Content.ReadAsStringAsync();
return JsonConvert.DeserializeObject<T>( response );
}
}
private static HttpClient CreateClient(int clientId)
{
var clientCred = Encoding.UTF8.GetBytes( clientId.ToString() );
var auth = Convert.ToBase64String( clientCred );
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue( "Basic",auth );
client.DefaultRequestHeaders.Add( "client_id","1234" );
return client;
}
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