HttpOperater-模拟HTTP操作类代码,CSharp代码库,德仔网

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【CSharp】 HttpOperater-模拟HTTP操作类
作者:Egbert / 发布于2016/1/4/ 1274

	using System;
	using System.IO;
	using System.Linq;
	using System.Net;
	using System.Text;
	using System.Text.RegularExpressions;
	
	namespace Whir.Software.DocumentDownLoader.Library
	{
	 /// <summary>
	 /// 模拟HTTP操作
	 /// </summary>
	 public class HttpOperater
	 {
	 /// <summary>
	 /// 发起Http请求
	 /// </summary>
	 /// <param name="httpRequestType">请求方式</param>
	 /// <param name="url">请求地址</param>
	 /// <param name="cookieInput">请求时传入的cookie</param>
	 /// <param name="cookieOutput">服务器返回的cookie</param>
	 /// <param name="postData">发送数据</param>
	 /// <returns></returns>
	 public static string DoRequest(HttpRequestType httpRequestType, string url, string cookieInput, ref string cookieOutput, string postData)
	 {
	 string response;
	 try
	 {
	 const string windowsUserName = "";
	 const string windowsPwd = "";
	 const string userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36";
	 const string accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
	 const string acceptLanguage = "zh-CN,zh;q=0.8";
	 const string acceptEncoding = "gzip,deflate,sdch";
	 CookieContainer cookieContainer = GetCookie(url, cookieInput);
	
	 var newUri = new Uri(url);
	 var request = (HttpWebRequest)WebRequest.Create(newUri);
	 request.PreAuthenticate = true;
	 if (windowsUserName.Length > 0 & windowsPwd.Length > 0)
	 {
	 request.Credentials = new NetworkCredential(windowsUserName.Trim(), windowsPwd.Trim());
	 }
	 request.Timeout = 20000;
	 request.CookieContainer = cookieContainer;
	 request.UserAgent = userAgent;
	 request.Accept = accept;
	 request.Headers["Accept-Language"] = acceptLanguage;
	 request.Headers["Accept-Charset"] = acceptEncoding;
	 request.Headers["Accept-Encoding"] = acceptEncoding;
	 request.Referer = newUri.AbsoluteUri;
	 request.Method = httpRequestType == HttpRequestType.GET ? "GET" : "POST";
	 if (request.Method == "POST")
	 {
	 request.ContentType = "application/x-www-form-urlencoded";
	 byte[] bytes = Encoding.UTF8.GetBytes(postData);
	 request.ContentLength = bytes.Length;
	 using (Stream requestStream = request.GetRequestStream())
	 {
	 requestStream.Write(bytes, 0, bytes.Length);
	 }
	 }
	 using (var wr = (HttpWebResponse)request.GetResponse())
	 {
	 response = new StreamReader(wr.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();
	 }
	 CookieCollection cookies = cookieContainer.GetCookies(newUri);
	 cookieOutput = CookieTostr(cookies);
	 }
	 catch (NotSupportedException exception)
	 {
	 response = exception.Message;
	 }
	 catch (InvalidOperationException exception)
	 {
	 response = exception.Message;
	 }
	 catch (IOException exception)
	 {
	 response = exception.Message;
	 }
	 catch (Exception exception)
	 {
	 response = exception.Message;
	 }
	 return response;
	 }
	 /// <summary>
	 /// 设置cookie域
	 /// </summary>
	 /// <param name="url">请求地址</param>
	 /// <param name="cookieInput">cookie</param>
	 /// <returns></returns>
	 private static CookieContainer GetCookie(string url, string cookieInput)
	 {
	 var cookieContainer = new CookieContainer();
	 var cookies = new CookieCollection();
	 string[] cookiesArr = cookieInput.Split(';');
	 foreach (string s in cookiesArr)
	 {
	 string[] keyValuePair = s.Split('=');
	 if (keyValuePair.Length > 1)
	 {
	 var cookie = new Cookie
	 {
	 Name = keyValuePair[0].Trim(),
	 Value = keyValuePair[1].Trim(),
	 Domain = GetDomain(url).Trim()//设置cookie域
	 };
	 cookies.Add(cookie);
	 }
	 }
	 cookieContainer.Add(cookies);
	 return cookieContainer;
	 }
	 /// <summary>
	 /// 通过Url取得域
	 /// </summary>
	 /// <param name="url"></param>
	 /// <returns></returns>
	 private static string GetDomain(string url)
	 {
	 var regex = new Regex("(?i)http[s]*://(?<domain>[\\w|.]*)",
	 RegexOptions.CultureInvariant | RegexOptions.Compiled);
	 return regex.Match(url).Groups["domain"].Value;
	 }
	
	 /// <summary>
	 /// 将cookie转为字符串
	 /// </summary>
	 /// <param name="cookies"></param>
	 /// <returns></returns>
	 private static string CookieTostr(CookieCollection cookies)
	 {
	 return cookies.Cast<Cookie>()
	 .Aggregate(string.Empty, (current, c) => current + (c.Name + "=" + c.Value + ";"));
	 }
	 }
	
	 /// <summary>
	 /// HTTP请求方式
	 /// </summary>
	 public enum HttpRequestType
	 {
	 /// <summary>
	 /// GET
	 /// </summary>
	 GET = 1,
	
	 /// <summary>
	 /// POST
	 /// </summary>
	 POST = 2
	 }
	}
	注：使用时，ref string cookiesOutput参数是服务器返回的Cookie，需保存用于下次请求。
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