C# 调用webApi接口的方法（类库HttpClient）
一、类库HttpClient，用于发送http请求
类似于axios，ajax等，无第三方依赖。
注意，这里的请求类型为application/json，你可以根据自己的需求的不同进行封装
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Net;
namespace UnifyPayPlatAPI.Controller
{
public class HttpClient
{
/// <summary>
/// 接口地址
/// </summary>
public string Url { get; set; }
/// <summary>
/// 内容，body，fields参数
/// </summary>
public string Data { get; set; }
/// <summary>
/// Cookie，保证登录后，所有访问持有一个Cookie；
/// </summary>
static CookieContainer Cookie = new CookieContainer();
/// <summary>
/// Seivice Method ,post,get,delete,put,等等，支持大小写
/// </summary>
public string Method { get; set; }
/// <summary>
/// 请求头
/// </summary>
public Dictionary<string, string> Headers { get; set; }
/// <summary>
/// 请求体类型 ，如application/json
/// </summary>
public string ContentType { get; set; }
/// <summary>
/// HTTP访问
/// </summary>
public string AsyncRequest()
{
HttpWebRequest httpRequest = HttpWebRequest.Create(Url) as HttpWebRequest;
httpRequest.Method = Method;
if (Headers != null && Headers.Count > 0)
{
for (int i = 0; i < Headers.Keys.Count; i++)
{
string key = Headers.Keys.ElementAt(i);
httpRequest.Headers.Add(key, Headers[key]);
}
}
httpRequest.ContentType = string.IsNullOrEmpty(ContentType) ? "application/json" : ContentType;
httpRequest.CookieContainer = Cookie;
httpRequest.Timeout = 1000 * 60 * 10;//10min
using (Stream reqStream = httpRequest.GetRequestStream())
{
var bytes = UnicodeEncoding.UTF8.GetBytes(Data);
reqStream.Write(bytes, 0, bytes.Length);
reqStream.Flush();
}
using (var repStream = httpRequest.GetResponse().GetResponseStream())
{
using (var reader = new StreamReader(repStream))
{
return ValidateResult(reader.ReadToEnd());
}
}
}
private static string ValidateResult(string responseText)
{
if (responseText.StartsWith("response_error:"))
{
return responseText.TrimStart("response_error:".ToCharArray());
}
return responseText;
}
}
}二、Json依赖
依赖于Newtonsoft.Json，需要去NuGet安装；
三、请求方式
3.1 方式一
//创建访问webapi必备对象 HttpClient httpClient = new HttpClient(); httpClient.Url = apiUrl611; httpClient.Data = JsonInput; httpClient.Method = "Post"; var JsonOut = httpClient.AsyncRequest(); var iResult = JObject.Parse(httpClient.AsyncRequest());
3.2 方式二
string data = "{ \"username\": \"zhangsan\",\"password\": \"123456\"}";
Dictionary<string, string> headers = new Dictionary<string, string>();
headers.Add("zhangsan","testToken123456");
//向后端发送请求
HttpClient httpClient = new HttpClient();
httpClient.Url = "http://localhost:5555/login";
httpClient.Method = "post";
httpClient.Data = data;
httpClient.Headers = headers;
//httpClient.ContentType = "application/json"; //不设置默认为application/json
//返回结果
//处理方式一
var iResult = JObject.Parse(httpClient.AsyncRequest());
int code = iResult ["code"].Value<int>();
string message = iResult ["message"].Value<string>;
JArray roles = iResult ["roles"] as JArray;
JArray roles = JArray.Parse(iResult ["roles"]);
//处理方式二
string iResult = httpClient.AsyncRequest();
//反序列化，当然你要先定义一个数据模型，负责接收反序列化后的数据
//为数据模型的类型
T res = JsonConvert.DeserializeObject<T>(iResult);拓展：
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