调用HTTP接口两种方式Demo
2021-07-10 19:06
标签:auto com ons cal ase 返回值 fda sts void 本Demo大部分参考原著:http://www.jianshu.com/p/cfdaf6857e7e 在WebApi发布之前,我们都是通过WebRequest/WebResponse这两个类组合来调用HTTP接口的 封装一个RestClient类 在Web API发布的同时,.NET提供了两个程序集: 以前的用法:创建一个控制台程序,测试HTTP接口的调用。 .NET提供了两个程序集: 这个例子就是控制台通过HttpClient这个类调用WebApi中的方法,WebApi就是项目新创建的ValuesController那个控制器,什么都没动,测试结果如下: 调用HTTP接口两种方式Demo 标签:auto com ons cal ase 返回值 fda sts void 原文地址:http://www.cnblogs.com/BOSET/p/7089284.htmlusing System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;
namespace WebApplication1
{
public class RestClient
{
private string BaseUri;
public RestClient(string baseUri)
{
this.BaseUri = baseUri;
}
#region Get请求
public string Get(string uri)
{
//先根据用户请求的uri构造请求地址
string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
//创建Web访问对 象
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
//通过Web访问对象获取响应内容
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
//通过响应内容流创建StreamReader对象,因为StreamReader更高级更快
StreamReader reader = new StreamReader(myResponse.GetResponseStream(),Encoding.UTF8);
//string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//如果有编码问题就用这个方法
string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
reader.Close();
myResponse.Close();
return returnXml;
}
#endregion
#region Post请求
public string Post(string data, string uri)
{
//先根据用户请求的uri构造请求地址
string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
//创建Web访问对象
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
//把用户传过来的数据转成“UTF-8”的字节流
byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data);
myRequest.Method = "POST";
myRequest.ContentLength = buf.Length;
myRequest.ContentType = "application/json";
myRequest.MaximumAutomaticRedirections = 1;
myRequest.AllowAutoRedirect = true;
//发送请求
Stream stream = myRequest.GetRequestStream();
stream.Write(buf,0,buf.Length);
stream.Close();
//获取接口返回值
//通过Web访问对象获取响应内容
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
//通过响应内容流创建StreamReader对象,因为StreamReader更高级更快
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
//string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//如果有编码问题就用这个方法
string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
reader.Close();
myResponse.Close();
return returnXml;
}
#endregion
#region Put请求
public string Put(string data, string uri)
{
//先根据用户请求的uri构造请求地址
string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
//创建Web访问对象
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
//把用户传过来的数据转成“UTF-8”的字节流
byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data);
myRequest.Method = "PUT";
myRequest.ContentLength = buf.Length;
myRequest.ContentType = "application/json";
myRequest.MaximumAutomaticRedirections = 1;
myRequest.AllowAutoRedirect = true;
//发送请求
Stream stream = myRequest.GetRequestStream();
stream.Write(buf, 0, buf.Length);
stream.Close();
//获取接口返回值
//通过Web访问对象获取响应内容
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
//通过响应内容流创建StreamReader对象,因为StreamReader更高级更快
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
//string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//如果有编码问题就用这个方法
string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
reader.Close();
myResponse.Close();
return returnXml;
}
#endregion
#region Delete请求
public string Delete(string data, string uri)
{
//先根据用户请求的uri构造请求地址
string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
//创建Web访问对象
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
//把用户传过来的数据转成“UTF-8”的字节流
byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data);
myRequest.Method = "DELETE";
myRequest.ContentLength = buf.Length;
myRequest.ContentType = "application/json";
myRequest.MaximumAutomaticRedirections = 1;
myRequest.AllowAutoRedirect = true;
//发送请求
Stream stream = myRequest.GetRequestStream();
stream.Write(buf, 0, buf.Length);
stream.Close();
//获取接口返回值
//通过Web访问对象获取响应内容
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
//通过响应内容流创建StreamReader对象,因为StreamReader更高级更快
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
//string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//如果有编码问题就用这个方法
string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
reader.Close();
myResponse.Close();
return returnXml;
}
#endregion
}
}
System.Net.Http
和System.Net.Http.Formatting
。这两个程序集中最核心的类是HttpClient
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WebApplication1;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
RestClient client = new RestClient("http://localhost:2444/");
string result = client.Get("api/Values");
Console.WriteLine(result);
Console.ReadKey();
}
}
}
System.Net.Http
和System.Net.Http.Formatting
。这两个程序集中最核心的类是HttpClient
。在.NET4.5中带有这两个程序集,而.NET4需要到Nuget里下载Microsoft.Net.Http和Microsoft.AspNet.WebApi.Client这两个包才能使用这个类,更低的.NET版本就只能表示遗憾了只能用WebRequest/WebResponse或者WebClient来调用这些API了。//控制台代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using WebApplication1;
using WebApplication1.Models;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
//RestClient client = new RestClient("http://localhost:2444/");
//string result = client.Get("api/Values");
//Console.WriteLine(result);
//Console.ReadKey();
var client = new HttpClient();
//基本的API URL
client.BaseAddress = new Uri("http://localhost:2444/");
//默认希望响应使用Json序列化(内容协商机制,我接受json格式的数据)
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
//运行client接收程序
Run(client);
Console.ReadLine();
}
//client接收处理(都是异步的处理)
static async void Run(HttpClient client)
{
//post 请求插入数据
var result = await AddPerson(client);
Console.WriteLine($"添加结果:{result}"); //添加结果:true
//get 获取数据
var person = await GetPerson(client);
//查询结果:Id=1 Name=test Age=10 Sex=F
Console.WriteLine($"查询结果:{person}");
//put 更新数据
result = await PutPerson(client);
//更新结果:true
Console.WriteLine($"更新结果:{result}");
//delete 删除数据
result = await DeletePerson(client);
//删除结果:true
Console.WriteLine($"删除结果:{result}");
}
//post
static async Taskbool> AddPerson(HttpClient client)
{
//向Person发送POST请求,Body使用Json进行序列化
return await client.PostAsJsonAsync("api/Person", new Person() { Age = 10, Id = 1, Name = "test", Sex = "F" })
//返回请求是否执行成功,即HTTP Code是否为2XX
.ContinueWith(x => x.Result.IsSuccessStatusCode);
}
//get
static async Task