c# RestSharp(http请求)

介绍：RestSharp

RestSharp是一个轻量的，不依赖任何第三方的模拟Http的组件或者类库。RestSharp具体以下特性；支持net4.0++，支持HTTP的GET, POST, PUT, HEAD, OPTIONS, DELETE等操作，支持oAuth 1, oAuth 2, Basic, NTLM and Parameter-based Authenticators等授权验证等。截止当前目前是github最高stars的http类库。

官方文档：https://restsharp.dev/get-help/
github:https://github.com/restsharp/RestSharp

nuget安装:

准备Webapi接口：

public class UnityController : ApiController{private IUserService _userService = null;public UnityController(IUserService userService){_userService = userService;}// GET api/<controller>public IEnumerable<Student> Get(){//return UnityFactoryUtil.GetServer<IUserService>().GetList();return _userService.GetList();}// POST api/<controller>public string Post([FromBody]string value){return value;}[Route("PostTest")]public string PostTest([FromBody]Student stu){return Newtonsoft.Json.JsonConvert.SerializeObject(stu);}}public class FirstController : ApiController{// GET api/<controller>public IEnumerable<string> Get(){return new string[] { "value1", "value2" };}// GET api/<controller>/5[AllowAnonymous]//不使用验证public string Get(int id){return "value";}[AllowAnonymous]//不使用验证[Route("GetById")]public string GetById([FromUri] Student stu){return "value";}}[RoutePrefix("api/File")]public class FileController : ApiController{/// 上传文件/// </summary>/// <returns></returns>[HttpPost]public string UploadFiles(){string result = "";var path=System.Web.Hosting.HostingEnvironment.MapPath("~/Upload");HttpFileCollection files = HttpContext.Current.Request.Files;if (files != null && files.Count > 0){for (int i = 0; i < files.Count; i++){HttpPostedFile file = files[i];string filename = file.FileName;string FileName = Guid.NewGuid().ToString()+Path.GetExtension(filename); ;string FilePath = path+"\\" + DateTime.Now.ToString("yyyy-MM-dd") + "\\";DirectoryInfo di = new DirectoryInfo(FilePath);if (!di.Exists){di.Create();}try{file.SaveAs(FilePath + FileName);result ="上传成功";}catch (Exception ex){result = "上传文件写入失败：" + ex.Message;}}}else{result = "上传的文件信息不存在！";}return result;}/// <summary>/// 下载文件/// </summary>[HttpGet]public HttpResponseMessage DownloadFile(){string fileName = "image.jpg";string filePath = HttpContext.Current.Server.MapPath("~/Upload/") + "image.jpg";FileStream stream = new FileStream(filePath, FileMode.Open);HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);response.Content = new StreamContent(stream);response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment"){FileName = HttpUtility.UrlEncode(fileName)};response.Headers.Add("Access-Control-Expose-Headers", "FileName");response.Headers.Add("FileName", HttpUtility.UrlEncode(fileName));return response;}}

使用介绍：

环境：net4.0、RestSharp(105.2.3.0版本)

注意bug：var response=client.Execute<Student>(request); 该方法序列化成实体有问题，可以改成序列化成dynamic(动态类)

           //Get{var client = new RestClient("https://localhost:44370/api/First");client.Authenticator = new RestSharp.Authenticators.HttpBasicAuthenticator("admin", "admin");var request = new RestRequest(Method.GET);request.AddHeader("Content-Type", "application/json");request.Timeout = 10000;request.AddHeader("Cache-Control", "no-cache");  request.AddParameter("name", "value"); // adds to POST or URL querystring based on Methodrequest.AddUrlSegment("id", "123"); // replaces matching token in request.Resource// add parameters for all properties on an object//request.AddJsonObject(@object);//直接传输一个实体//request.AddJsonBody("实体");//request.AddObject(object, "PersonId", "Name", ...);request.AddHeader("header", "value");//add files to upload (works with compatible verbs)//request.AddFile("file", path);var response = client.Execute(request);var content = response.Content;}//POST(单个参数与){var client = new RestClient("https://localhost:44370/api/Unity");var request = new RestRequest(Method.POST);request.AddParameter("", "value");var response = client.Execute(request);var content = response.Content;}//POST(实体参数){var client = new RestClient("https://localhost:44370/api/Unity/PostTest");var request = new RestRequest(Method.POST);request.AddHeader("Content-Type", "application/json");Student stu = new Student{AGE = 26,ID = 1,NAME = "czk",PWD = 123456};request.AddJsonBody(stu);//var response = client.Execute<Student>(request);//报错、var response = client.Execute<dynamic>(request);var retStu = Newtonsoft.Json.JsonConvert.DeserializeObject<Student>(response.Data);}//上传文件{var client = new RestClient("https://localhost:44370/api/File/UploadFiles");var request = new RestRequest(Method.POST);var imagePath = AppDomain.CurrentDomain.BaseDirectory + @"File\image.jpg";request.AddFile("image", imagePath);var response = client.Execute(request);var content = response.Content;}//下载文件{var client = new RestClient("https://localhost:44370/api/File/DownloadFile");var request = new RestRequest(Method.GET);string tempFile = Path.GetTempFileName();var writer = File.OpenWrite(tempFile);request.ResponseWriter = responseStream =>{using (responseStream){responseStream.CopyTo(writer);}};byte[] bytes = client.DownloadData(request);}

扩展：

c# EasyHttp (http请求库)：https://blog.csdn.net/czjnoe/article/details/106483861

demo:https://github.com/czjnoe/GitHubDemo/tree/master/RestSharpDemo

github下载慢参考：https://blog.csdn.net/czjnoe/article/details/106321174

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