Question

我想使用IHttpClientFactory来使用我的API。

关于如何使用SendAsync从API请求数据有很多示例，但是如果我想使用IHttpClientFactory发布数据怎么办？

我尝试过类似的操作，但是该将对象传递到哪里？

var request = new HttpRequestMessage(HttpMethod.Post, "https://localhost:44357/api/users/validateuser");

var client = _httpClientFactory.CreateClient();

var response = await client.SendAsync(request);

Answer 1

这是一个POST的示例，它将一个序列化的对象传递给API，并接收返回的JSON以进行反序列化：

var result;

try
{
    HttpClient client = _httpClientFactory.CreateClient("MyAPI");
    //2 minute timeout on wait for response
    client.Timeout = new TimeSpan(0, 2, 0);
    //Create an HttpRequestMessage object and pass it into SendAsync()
    HttpRequestMessage message = new HttpRequestMessage();
    message.Headers.Add("Accept", "application/json");
    message.Content = new StringContent(JsonConvert.SerializeObject(myObj), System.Text.Encoding.UTF8, "application/json");
    message.Method = HttpMethod.Post;
    message.RequestUri = new Uri(client.BaseAddress.ToString() + "someapiendpoint");

    HttpResponseMessage response = await client.SendAsync(message);
    result = await response.Content.ReadAsStringAsync();
    //deserialize the result into proper object type
}
catch (Exception ex)
{
    //Log exception
}

Answer 2

var request = new HttpRequestMessage(HttpMethod.Post, "https://localhost:44357/api/users/validateuser");

request.Content = foo; //is where you pass the payload

Content是HttpContent的类型，它是无法实例化的抽象类，但是您有多个继承自它的类：

ByteArrayContent，MultipartContent，ReadOnlyMemoryContent，StreamContent，FormUrlEncodedContent，MultipartFormDataContent和StringContent。最常见的是StringContent，因此您可以使用任何类型的JSON序列化程序（Newtonsoft，System.Text.Json序列化程序等）将C＃对象序列化为JSON字符串。 Newtonsoft.Json的示例：

using Newtonsoft.Json;


var jsonContent = JsonConvert.SerializeObject(object);
request.Content = new StringContent(jsonContent);

我正在寻找IHttpClientFactory-> HttpMethod.Post示例

2 个答案: