我的建议是使用RestSharp。您可以调用REST服务，并将它们转换为POCO对象，只需要很少的样板代码就可以解析响应。这不会解决您的特定错误，但它回答了如何调用REST服务的总体问题。必须更改代码才能使用它，这应该会在易用性和健壮性方面得到回报。不过这只是我的个人观点。

例子:

namespace RestSharpThingy
{
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Net;
    using System.Reflection;
    using RestSharp;

    public static class Program
    {
        public static void Main()
        {
            Uri baseUrl = new Uri("https://httpbin.org/");
            IRestClient client = new RestClient(baseUrl);
            IRestRequest request = new RestRequest("get", Method.GET) { Credentials = new NetworkCredential("testUser", "P455w0rd") };

            request.AddHeader("Authorization", "Bearer qaPmk9Vw8o7r7UOiX-3b-8Z_6r3w0Iu2pecwJ3x7CngjPp2fN3c61Q_5VU3y0rc-vPpkTKuaOI2eRs3bMyA5ucKKzY1thMFoM0wjnReEYeMGyq3JfZ-OIko1if3NmIj79ZSpNotLL2734ts2jGBjw8-uUgKet7jQAaq-qf5aIDwzUo0bnGosEj_UkFxiJKXPPlF2L4iNJSlBqRYrhw08RK1SzB4tf18Airb80WVy1Kewx2NGq5zCC-SCzvJW-mlOtjIDBAQ5intqaRkwRaSyjJ_MagxJF_CLc4BNUYC3hC2ejQDoTE6HYMWMcg0mbyWghMFpOw3gqyfAGjr6LPJcIly__aJ5__iyt-BTkOnMpDAZLTjzx4qDHMPWeND-TlzKWXjVb5yMv5Q6Jg6UmETWbuxyTdvGTJFzanUg1HWzPr7gSs6GLEv9VDTMiC8a5sNcGyLcHBIJo8mErrZrIssHvbT8ZUPWtyJaujKvdgazqsrad9CO3iRsZWQJ3lpvdQwucCsyjoRVoj_mXYhz3JK3wfOjLff16Gy1NLbj4gmOhBBRb8rJnUXnP7rBHs00FAk59BIpKLIPIyMgYBApDCut8V55AgXtGs4MgFFiJKbuaKxq8cdMYEVBTzDJ-S1IR5d6eiTGusD5aFlUkAs9NV_nFw");
            request.AddParameter("clientId", 123);

            IRestResponse<RootObject> response = client.Execute<RootObject>(request);

            if (response.IsSuccessful)
            {
                response.Data.Write();
            }
            else
            {
                Console.WriteLine(response.ErrorMessage);
            }

            Console.WriteLine();

            string path = Assembly.GetExecutingAssembly().Location;
            string name = Path.GetFileName(path);

            request = new RestRequest("post", Method.POST);
            request.AddFile(name, File.ReadAllBytes(path), name, "application/octet-stream");
            response = client.Execute<RootObject>(request);
            if (response.IsSuccessful)
            {
                response.Data.Write();
            }
            else
            {
                Console.WriteLine(response.ErrorMessage);
            }

            Console.ReadLine();
        }

        private static void Write(this RootObject rootObject)
        {
            Console.WriteLine("clientId: " + rootObject.args.clientId);
            Console.WriteLine("Accept: " + rootObject.headers.Accept);
            Console.WriteLine("AcceptEncoding: " + rootObject.headers.AcceptEncoding);
            Console.WriteLine("AcceptLanguage: " + rootObject.headers.AcceptLanguage);
            Console.WriteLine("Authorization: " + rootObject.headers.Authorization);
            Console.WriteLine("Connection: " + rootObject.headers.Connection);
            Console.WriteLine("Dnt: " + rootObject.headers.Dnt);
            Console.WriteLine("Host: " + rootObject.headers.Host);
            Console.WriteLine("Origin: " + rootObject.headers.Origin);
            Console.WriteLine("Referer: " + rootObject.headers.Referer);
            Console.WriteLine("UserAgent: " + rootObject.headers.UserAgent);
            Console.WriteLine("origin: " + rootObject.origin);
            Console.WriteLine("url: " + rootObject.url);
            Console.WriteLine("data: " + rootObject.data);
            Console.WriteLine("files: ");
            foreach (KeyValuePair<string, string> kvp in rootObject.files ?? Enumerable.Empty<KeyValuePair<string, string>>())
            {
                Console.WriteLine("\t" + kvp.Key + ": " + kvp.Value);
            }
        }
    }

    public class Args
    {
        public string ClientId { get; set; }
    }

    public class Headers
    {
        public string Accept { get; set; }

        public string AcceptEncoding { get; set; }

        public string AcceptLanguage { get; set; }

        public string Authorization { get; set; }

        public string Connection { get; set; }

        public string Dnt { get; set; }

        public string Host { get; set; }

        public string Origin { get; set; }

        public string Referer { get; set; }

        public string UserAgent { get; set; }
    }

    public class RootObject
    {
        public Args args { get; set; }

        public Headers Headers { get; set; }

        public string Origin { get; set; }

        public string Url { get; set; }

        public string Data { get; set; }

        public Dictionary<string, string> Files { get; set; }
    }
}

由于您使用的是Visual Studio 11 Beta，您将希望使用最新的和最好的。新的Web API包含了这方面的类。

参见HttpClient: http://wcf.codeplex.com/wikipage?title=WCF%20HTTP

与此无关，我确定，但请使用块包装您的IDisposable对象，以确保适当的处置:

using System;
using System.Net;
using System.IO;

namespace ConsoleProgram
{
    public class Class1
    {
        private const string URL = "https://sub.domain.com/objects.json?api_key=123";
        private const string DATA = @"{""object"":{""name"":""Name""}}";

        static void Main(string[] args)
        {
            Class1.CreateObject();
        }

        private static void CreateObject()
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);
            request.Method = "POST";
            request.ContentType = "application/json";
            request.ContentLength = DATA.Length;
            using (Stream webStream = request.GetRequestStream())
            using (StreamWriter requestWriter = new StreamWriter(webStream, System.Text.Encoding.ASCII))
            {
                requestWriter.Write(DATA);
            }

            try
            {
                WebResponse webResponse = request.GetResponse();
                using (Stream webStream = webResponse.GetResponseStream() ?? Stream.Null)
                using (StreamReader responseReader = new StreamReader(webStream))
                {
                    string response = responseReader.ReadToEnd();
                    Console.Out.WriteLine(response);
                }
            }
            catch (Exception e)
            {
                Console.Out.WriteLine("-----------------");
                Console.Out.WriteLine(e.Message);
            }
        }
    }
}

ASP。NET Web API已经取代了前面提到的WCF Web API。

我想我应该发布一个更新的答案，因为这些回答大部分来自2012年初，当在谷歌上搜索“调用基于rest的服务c#”时，这个帖子是排名靠前的结果之一。

目前微软的指导方针是使用微软ASP。NET Web API客户端库来使用RESTful服务。这是一个NuGet包，Microsoft.AspNet.WebApi.Client。您需要将这个NuGet包添加到您的解决方案中。

下面是使用ASP实现示例时的外观。NET Web API客户端库:

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;

namespace ConsoleProgram
{
    public class DataObject
    {
        public string Name { get; set; }
    }

    public class Class1
    {
        private const string URL = "https://sub.domain.com/objects.json";
        private string urlParameters = "?api_key=123";

        static void Main(string[] args)
        {
            HttpClient client = new HttpClient();
            client.BaseAddress = new Uri(URL);

            // Add an Accept header for JSON format.
            client.DefaultRequestHeaders.Accept.Add(
            new MediaTypeWithQualityHeaderValue("application/json"));

            // List data response.
            HttpResponseMessage response = client.GetAsync(urlParameters).Result;  // Blocking call! Program will wait here until a response is received or a timeout occurs.
            if (response.IsSuccessStatusCode)
            {
                // Parse the response body.
                var dataObjects = response.Content.ReadAsAsync<IEnumerable<DataObject>>().Result;  //Make sure to add a reference to System.Net.Http.Formatting.dll
                foreach (var d in dataObjects)
                {
                    Console.WriteLine("{0}", d.Name);
                }
            }
            else
            {
                Console.WriteLine("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);
            }

            // Make any other calls using HttpClient here.

            // Dispose once all HttpClient calls are complete. This is not necessary if the containing object will be disposed of; for example in this case the HttpClient instance will be disposed automatically when the application terminates so the following call is superfluous.
            client.Dispose();
        }
    }
}

如果您计划发出多个请求，您应该重用HttpClient实例。请参阅这个问题及其答案，以了解为什么在这种情况下没有在HttpClient实例上使用using语句的更多细节:HttpClient和HttpClientHandler必须在请求之间被处理吗?

有关更多细节，包括其他示例，请参见从。net客户端调用Web API (c#)

这篇博客文章也可能有用:使用HttpClient消费ASP。NET Web API REST服务

    var TakingRequset = WebRequest.Create("http://xxx.acv.com/MethodName/Get");
    TakingRequset.Method = "POST";
    TakingRequset.ContentType = "text/xml;charset=utf-8";
    TakingRequset.PreAuthenticate = true;

    //---Serving Request path query
     var PAQ = TakingRequset.RequestUri.PathAndQuery;

    //---creating your xml as per the host reqirement
    string xmlroot=@"<root><childnodes>passing parameters</childnodes></root>";
    string xmlroot2=@"<root><childnodes>passing parameters</childnodes></root>";

    //---Adding Headers as requested by host 
    xmlroot2 = (xmlroot2 + "XXX---");
    //---Adding Headers Value as requested by host 
  //  var RequestheaderVales = Method(xmlroot2);

    WebProxy proxy = new WebProxy("XXXXX-----llll", 8080);
    proxy.Credentials = new NetworkCredential("XXX---uuuu", "XXX----", "XXXX----");
    System.Net.WebRequest.DefaultWebProxy = proxy;


    // Adding The Request into Headers
    TakingRequset.Headers.Add("xxx", "Any Request Variable ");
    TakingRequset.Headers.Add("xxx", "Any Request Variable");

    byte[] byteData = Encoding.UTF8.GetBytes(xmlroot);
    TakingRequset.ContentLength = byteData.Length;

    using (Stream postStream = TakingRequset.GetRequestStream())
    {
        postStream.Write(byteData, 0, byteData.Length);
        postStream.Close();
    }



    StreamReader stredr = new StreamReader(TakingRequset.GetResponse().GetResponseStream());
    string response = stredr.ReadToEnd();

请使用以下代码进行REST API请求:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Json;

namespace ConsoleApplication2
{
    class Program
    {
        private const string URL = "https://XXXX/rest/api/2/component";
        private const string DATA = @"{
            ""name"": ""Component 2"",
            ""description"": ""This is a JIRA component"",
            ""leadUserName"": ""xx"",
            ""assigneeType"": ""PROJECT_LEAD"",
            ""isAssigneeTypeValid"": false,
            ""project"": ""TP""}";

        static void Main(string[] args)
        {
            AddComponent();
        }

        private static void AddComponent()
        {
            System.Net.Http.HttpClient client = new System.Net.Http.HttpClient();
            client.BaseAddress = new System.Uri(URL);
            byte[] cred = UTF8Encoding.UTF8.GetBytes("username:password");
            client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", Convert.ToBase64String(cred));
            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

            System.Net.Http.HttpContent content = new StringContent(DATA, UTF8Encoding.UTF8, "application/json");
            HttpResponseMessage messge = client.PostAsync(URL, content).Result;
            string description = string.Empty;
            if (messge.IsSuccessStatusCode)
            {
                string result = messge.Content.ReadAsStringAsync().Result;
                description = result;
            }
        }
    }
}

这是可以肯定工作的示例代码。我花了一天的时间来从REST服务中读取一组对象:

RootObject是我从REST服务中读取的对象类型。

string url = @"http://restcountries.eu/rest/v1";
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(IEnumerable<RootObject>));
WebClient syncClient = new WebClient();
string content = syncClient.DownloadString(url);

using (MemoryStream memo = new MemoryStream(Encoding.Unicode.GetBytes(content)))
{
    IEnumerable<RootObject> countries = (IEnumerable<RootObject>)serializer.ReadObject(memo);
}

Console.Read();

在使用。net 4.5或。net Core时调用REST API

我推荐DalSoft。RestClient(注意:是我创建的)。原因是，因为它使用动态类型，您可以在一个流畅的调用中包装所有内容，包括序列化/反序列化。下面是一个工作的PUT示例:

dynamic client = new RestClient("http://jsonplaceholder.typicode.com");

var post = new Post { title = "foo", body = "bar", userId = 10 };

var result = await client.Posts(1).Put(post);

查看Refit从. net调用REST服务。我发现它很容易使用:

改装:自动类型安全的REST库。net Core, Xamarin和 net Refit是一个很大程度上受到Square的Retrofit库启发的库 它把你的REST API变成一个活动接口:

public interface IGitHubApi {
        [Get("/users/{user}")]
        Task<User> GetUser(string user);
}

// The RestService class generates an implementation of IGitHubApi
// that uses HttpClient to make its calls:

var gitHubApi = RestService.For<IGitHubApi>("https://api.github.com");

var octocat = await gitHubApi.GetUser("octocat");

GET:

// GET JSON Response
public WeatherResponseModel GET(string url) {
    WeatherResponseModel model = new WeatherResponseModel();
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    try {
        WebResponse response = request.GetResponse();
        using(Stream responseStream = response.GetResponseStream()) {
            StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
            model = JsonConvert.DeserializeObject < WeatherResponseModel > (reader.ReadToEnd());
        }
    } catch (WebException ex) {
        WebResponse errorResponse = ex.Response;
        using(Stream responseStream = errorResponse.GetResponseStream()) {
            StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
            String errorText = reader.ReadToEnd();
            // Log errorText
        }
        throw;
    }
    return model;
}

职位:

// POST a JSON string
void POST(string url, string jsonContent) {
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    request.Method = "POST";

    System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
    Byte[]byteArray = encoding.GetBytes(jsonContent);

    request.ContentLength = byteArray.Length;
    request.ContentType =  @ "application/json";

    using(Stream dataStream = request.GetRequestStream()) {
        dataStream.Write(byteArray, 0, byteArray.Length);
    }

    long length = 0;
    try {
        using(HttpWebResponse response = (HttpWebResponse)request.GetResponse()) {
            // Got response
            length = response.ContentLength;
        }
    } catch (WebException ex) {
        WebResponse errorResponse = ex.Response;
        using(Stream responseStream = errorResponse.GetResponseStream()) {
            StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
            String errorText = reader.ReadToEnd();
            // Log errorText
        }
        throw;
    }
}

注意:为了序列化和反序列化JSON，我使用了Newtonsoft。Json NuGet包。

第一步是为HTTP客户机创建helper类。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;

namespace callApi.Helpers
{
    public class CallApi
    {
        private readonly Uri BaseUrlUri;
        private HttpClient client = new HttpClient();

        public CallApi(string baseUrl)
        {
            BaseUrlUri = new Uri(baseUrl);
            client.BaseAddress = BaseUrlUri;
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(
                new MediaTypeWithQualityHeaderValue("application/json"));
        }

        public HttpClient getClient()
        {
            return client;
        }

        public HttpClient getClientWithBearer(string token)
        {
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
            return client;
        }
    }
}

然后可以在代码中使用这个类。

这是如何使用上面的类调用不带承载的REST API的示例。

// GET API/values
[HttpGet]
public async Task<ActionResult<string>> postNoBearerAsync(string email, string password,string baseUrl, string action)
{
    var request = new LoginRequest
    {
        email = email,
        password = password
    };

    var callApi = new CallApi(baseUrl);
    var client = callApi.getClient();
    HttpResponseMessage response = await client.PostAsJsonAsync(action, request);
    if (response.IsSuccessStatusCode)
        return Ok(await response.Content.ReadAsAsync<string>());
    else
        return NotFound();
}

这是一个如何调用需要承载的REST API的示例。

// GET API/values
[HttpGet]
public async Task<ActionResult<string>> getUseBearerAsync(string token, string baseUrl, string action)
{
    var callApi = new CallApi(baseUrl);
    var client = callApi.getClient();
    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
    HttpResponseMessage response = await client.GetAsync(action);
    if (response.IsSuccessStatusCode)
    {
        return Ok(await response.Content.ReadAsStringAsync());
    }
    else
        return NotFound();
}

如果您想查看它如何工作的工作示例，还可以参考下面的存储库。

https://github.com/mokh223/callApi

我使用Web API 2.0以这种简单的方式做到了这一点。您可以删除UseDefaultCredentials。我在自己的用例中使用了它。

List<YourObject> listObjects = new List<YourObject>();

string response = "";
using (var client = new WebClient() { UseDefaultCredentials = true })
{
     response = client.DownloadString(apiUrl);
}

listObjects = JsonConvert.DeserializeObject<List<YourObject>>(response);
return listObjects;

一种ASP解决方案。NET核心:

using Newtonsoft.Json;
using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Configuration;

namespace WebApp
{
    public static class HttpHelper
    {
        // In my case this is https://localhost:44366/
        private static readonly string apiBasicUri = ConfigurationManager.AppSettings["apiBasicUri"];

        public static async Task Post<T>(string url, T contentValue)
        {
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(apiBasicUri);
                var content = new StringContent(JsonConvert.SerializeObject(contentValue), Encoding.UTF8, "application/json");
                var result = await client.PostAsync(url, content);
                result.EnsureSuccessStatusCode();
            }
        }

        public static async Task Put<T>(string url, T stringValue)
        {
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(apiBasicUri);
                var content = new StringContent(JsonConvert.SerializeObject(stringValue), Encoding.UTF8, "application/json");
                var result = await client.PutAsync(url, content);
                result.EnsureSuccessStatusCode();
            }
        }

        public static async Task<T> Get<T>(string url)
        {
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(apiBasicUri);
                var result = await client.GetAsync(url);
                result.EnsureSuccessStatusCode();
                string resultContentString = await result.Content.ReadAsStringAsync();
                T resultContent = JsonConvert.DeserializeObject<T>(resultContentString);
                return resultContent;
            }
        }

        public static async Task Delete(string url)
        {
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(apiBasicUri);
                var result = await client.DeleteAsync(url);
                result.EnsureSuccessStatusCode();
            }
        }
    }
}

要发布，可以使用这样的代码:

await HttpHelper.Post<Setting>($"/api/values/{id}", setting);

删除示例:

await HttpHelper.Delete($"/api/values/{id}");

获取列表的示例:

List<ClaimTerm> claimTerms = await HttpHelper.Get<List<ClaimTerm>>("/api/values/");

示例只获取一个:

ClaimTerm processedClaimImage = await HttpHelper.Get<ClaimTerm>($"/api/values/{id}");

以下是在c#中调用外部API的几种不同方式(2019年更新)。

.NET的内置方式:

webrequest和WebClient——冗长的api和微软的文档不是很容易理解 HttpClient - . net的最新产品&使用起来比上面提到的简单多了。

免费、开源的NuGet包，坦率地说，它比。net内置客户端有更好的开发体验:

ServiceStack。文本(1000个GitHub星，700万NuGet下载)(*)-快速，轻便和弹性。 RestSharp(6000个GitHub星，2300万NuGet下载)(*)-简单的REST和HTTP API客户端 Flurl (1700 GitHub星，300万NuGet下载)(*)-一个流畅，可移植，可测试的HTTP客户端库

上面所有的包都提供了很棒的开发体验(即简洁、简单的API)，并且维护得很好。

(*)截至2019年8月

示例:使用servicstack . text从伪Rest API获取Todo项。 其他库具有非常相似的语法。

class Program
{
    static void Main(string[] args)
    {
        // Fake rest API
        string url = "https://jsonplaceholder.typicode.com/todos/1";

        // GET data from API & map to POCO
        var todo =  url.GetJsonFromUrl().FromJson<Todo>();

        // Print the result to screen
        todo.PrintDump();
    }

    public class Todo
    {
        public int UserId { get; set; }
        public int Id { get; set; }
        public string Title { get; set; }
        public bool Completed { get; set; }
    }

}

在. net核心控制台应用程序中运行上述示例，产生以下输出。

使用NuGet安装这些包

Install-Package ServiceStack.Text, or

Install-Package RestSharp, or

Install-Package Flurl.Http

此处标记的答案建议直接使用HttpClient并销毁它。这可能会起作用，但是如果你没有正确地使用HttpClient，它很容易遇到问题。

如果您打算使用HttpClient，最好将HttpClient的创建/处理交给使用工厂模式的第三方库。RestClient。Net就是这样一个库。

它带有一个非常基本的HttpClient工厂，这样你就不会碰到套接字耗尽的问题，

public class DefaultHttpClientFactory : IHttpClientFactory, IDisposable
{
    #region Fields
    private bool disposed;
    private readonly ConcurrentDictionary<string, Lazy<HttpClient>> _httpClients;
    private readonly Func<string, Lazy<HttpClient>> _createClientFunc;
    #endregion

    #region Constructor
    public DefaultHttpClientFactory() : this(null)
    {
    }

    public DefaultHttpClientFactory(Func<string, Lazy<HttpClient>> createClientFunc)
    {
        _createClientFunc = createClientFunc;
        _httpClients = new ConcurrentDictionary<string, Lazy<HttpClient>>();

        if (_createClientFunc != null) return;
        _createClientFunc = name =>
        {
            return new Lazy<HttpClient>(() => new HttpClient(), LazyThreadSafetyMode.ExecutionAndPublication);
        };
    }
    #endregion

    #region Implementation
    public HttpClient CreateClient(string name)
    {
        if (name == null)
        {
            throw new ArgumentNullException(nameof(name));
        }

        return _httpClients.GetOrAdd(name, _createClientFunc).Value;
    }

    public void Dispose()
    {
        if (disposed) return;
        disposed = true;

        foreach (var name in _httpClients.Keys)
        {
            _httpClients[name].Value.Dispose();
        }
    }
    #endregion
}

但是微软的IHttpClientFactory实现也可以用于最新和最好的:

    var serviceCollection = new ServiceCollection();
    var baseUri = new Uri("http://www.test.com");
    serviceCollection.AddSingleton(typeof(ISerializationAdapter), typeof(NewtonsoftSerializationAdapter));
    serviceCollection.AddSingleton(typeof(ILogger), typeof(ConsoleLogger));
    serviceCollection.AddSingleton(typeof(IClient), typeof(Client));
    serviceCollection.AddDependencyInjectionMapping();
    serviceCollection.AddTransient<TestHandler>();

    //Make sure the HttpClient is named the same as the Rest Client
    serviceCollection.AddSingleton<IClient>(x => new Client(name: clientName, httpClientFactory: x.GetRequiredService<IHttpClientFactory>()));
    serviceCollection.AddHttpClient(clientName, (c) => { c.BaseAddress = baseUri; })
        .AddHttpMessageHandler<TestHandler>();

    var serviceProvider = serviceCollection.BuildServiceProvider();
    var client = serviceProvider.GetService<IClient>();
    await client.GetAsync<object>();

RestClient。Net考虑了依赖注入、模拟、IoC容器、单元可测试性，最重要的是速度快。我四处寻找，唯一的另一个客户端，似乎工作在类似的能力是flul . http。

HTTP GET请求

    string api = this.configuration["getApiUrl"];//Read from Iconfiguration object injected
     public async Task<HttpResponseMessage> GetAsync(string api, ILogger log, params dynamic[] parameters)
            {
                log.LogInformation($"Get Token");
                var token = await GetTokenAsync(this.configuration["ClientId"], this.configuration["AppKey"]).ConfigureAwait(false);
                using (var client = new HttpClient())
                {
                  client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(BearerTokenName, token);
                    var apiBaseUrl = this.configuration["BaseUrl"];
                   
                    client.BaseAddress = new Uri(apiBaseUrl);
                    var apiUrl = ConstructUrl(api, parameters);
                    var result = await client.GetAsync(apiUrl).ConfigureAwait(false);
    
                    if (result.StatusCode == System.Net.HttpStatusCode.OK)
                    {
                        return result;
                    }
                    else
                    {
                       throw new HttpResponseException(new HttpResponseMessage(result.StatusCode) { Content = new StringContent(result.ReasonPhrase) });
                    }
                }
            }
    

从HttpResponseMessage读取字符串，如下所示

     var client = await this.httpClientService.GetAsync(url, logger, Convert.ToInt32(Id, CultureInfo.InvariantCulture)).ConfigureAwait(false);
     var response = await client.Content.ReadAsStringAsync();

HTTP POST请求

     public async Task<string> PostAsync(string api, string contentValue, ILogger logger)
           {
               var token = await GetTokenAsync(this.configuration["ClientId"], this.configuration["AppKey"]).ConfigureAwait(false);
   
               using (var client = new HttpClient())
               {
                   client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(BearerTokenName, token);
                   client.BaseAddress = new Uri(resource);
                   var content = new StringContent(contentValue, Encoding.UTF8, MediaTypeNames.Application.Json);
                   var result = await client.PostAsync(new Uri(api, UriKind.Relative), content).ConfigureAwait(false);
   
                   if (result.StatusCode == System.Net.HttpStatusCode.OK)
                   {
                       return await result.Content.ReadAsStringAsync();
                   }
                   else
                   {
                       throw new HttpResponseException(new HttpResponseMessage(result.StatusCode) { Content = new StringContent(result.ReasonPhrase) });
                   }
               }
           }

    var response = await this.httpClientService.PostAsync(this.configuration["getDetails"], content, this.configuration["ApiBaseUrl"], logger).ConfigureAwait(false);
      catch (System.Web.Http.HttpResponseException httpException)
                        {
                            if (httpException.Response.StatusCode == HttpStatusCode.Unauthorized)
                            {
                                logger.LogError($"Failed To Update", httpException);
                            }
                            else
                            {
                                throw;
                            }
                        }
    return response;

我们已经开始使用地下酒吧了。这很棒:

https://github.com/jonnii/SpeakEasy

// create a client
var client = HttpClient.Create("http://example.com/api");
    
// get some companies!
var companies = client.Get("companies").OnOk().As<List<Company>>();
  
// upload a company, with validation error support
client.Post(company, "companies")
    .On(HttpStatusCode.BadRequest, (List<ValidationError> errors) => {
        Console.WriteLine("Ruh Roh, you have {0} validation errors", errors.Count());
    })
    .On(HttpStatusCode.Created, () => Console.WriteLine("Holy moly you win!"));
    
// update a company
client.Put(company, "company/:id", new { id = "awesome-sauce" })
    .OnOk(() => Console.WriteLine("Company updated"));
        
// run a search
client.Get("images/:category", new { category = "cats", breed = "omg the cutest", size = "kittens" })
    .OnOk().As<List<Image>>();
    
// make an asynchronous request
var response = await client.GetAsync("companies/:id", new { id = 5 })
response.OnOk(UpdateCompaniesCallback)