一个封装好的Asp.Net C# HttpRequest请求类
HTTP请求类：
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View Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
namespace WebRequestAPP
{
/// <summary>
/// Http请求
/// </summary>
public class HttpUtility
{
/// <summary>
///通用HttpWebRequest
/// </summary>
/// <param name="method">请求方式（POST/GET）</param>
/// <param name="url">请求地址</param>
/// <param name="param">请求参数</param>
/// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
/// <returns>请求返回的结果</returns>
public static string Request(string method, string url, string param, Action<HttpStatusCode,string> onComplete = null)
{
if(string.IsNullOrEmpty(url))
throw new ArgumentNullException("URL");
switch (method.ToUpper())
{
case "POST":
return Post(url, param, onComplete);
case "GET":
return Get(url, param, onComplete);
default:
throw new EntryPointNotFoundException("method:" + method);
}
}
/// <summary>
/// Post请求
/// </summary>
/// <param name="url">请求地址</param>
/// <param name="param">参数</param>
/// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
/// <returns>请求返回的结果</returns>
public static string Post(string url, string param, Action<HttpStatusCode, string> onComplete = null)
{
UrlCheck(ref url);
byte[] bufferBytes = Encoding.UTF8.GetBytes(param);
var request = WebRequest.Create(url) as HttpWebRequest;//HttpWebRequest方法继承自WebRequest, Create方法在WebRequest中定义，因此此处要显示的转换
request.Method = "POST";
request.ContentLength = bufferBytes.Length;
request.ContentType = "application/x-www-form-urlencoded";
try
{
using (var requestStream = request.GetRequestStream())
{
requestStream.Write(bufferBytes, 0, bufferBytes.Length);
}
}
catch (WebException ex)
{
return ex.Message;
}
return HttpRequest(request, onComplete);
}
/// <summary>
/// GET请求
/// </summary>
/// <param name="url">请求地址</param>
/// <param name="param">参数</param>
/// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
/// <returns>请求返回结果</returns>
public static string Get(string url, string param, Action<HttpStatusCode, string> onComplete = null)
{
UrlCheck(ref url);
if (!string.IsNullOrEmpty(param))
if (!param.StartsWith("?"))
param += "?" + param;
else
param += param;
var request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "GET";
request.ContentType = "application/x-www-form-urlencoded";
return HttpRequest(request, onComplete);
}
/// <summary>
/// 请求的主体部分（由此完成请求并返回请求结果）
/// </summary>
/// <param name="request">请求的对象</param>
/// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>
/// <returns>请求返回结果</returns>
private static string HttpRequest(HttpWebRequest request, Action<HttpStatusCode, string> onComplete = null)
{
HttpWebResponse response = null;
try
{
response = request.GetResponse() as HttpWebResponse;
}
catch (WebException ex)
{
response = ex.Response as HttpWebResponse;
}
if (response == null)
{
if (onComplete != null)
onComplete(HttpStatusCode.NotFound, "请求远程返回为空");
return null;
}
string result = string.Empty;
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
result = reader.ReadToEnd();
}
if (onComplete != null)
onComplete(response.StatusCode, result);
return result;
}
/// <summary>
/// URL拼写完整性检查
/// </summary>
/// <param name="url">待检查的URL</param>
private static void UrlCheck(ref string url)
{
if (!url.StartsWith("http://") && !url.StartsWith("https://"))
url="http://"+url;
}
}
}
http://www.dedecms.com/knowledge/program/asp-donet/2012/0803/4214.html
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