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云代码 - c#代码库

封装HttpWebResponse

2015-08-28 作者： 江湖举报

[c#]代码库

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/// <summary> 
   /// 有关HTTP请求的辅助类 
   /// </summary> 
   public class HttpWebResponseUtility
   {
       private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
       /// <summary> 
       /// 创建GET方式的HTTP请求 
       /// </summary> 
       /// <param name="url">请求的URL</param> 
       /// <param name="timeout">请求的超时时间</param> 
       /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param> 
       /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param> 
       /// <returns></returns> 
       public static HttpWebResponse CreateGetHttpResponse(string url, IDictionary<string, string> parameters, int? timeout, string userAgent, CookieCollection cookies)
       {
           if (string.IsNullOrEmpty(url))
           {
               throw new ArgumentNullException("url");
           }
 
           StringBuilder buffer = new StringBuilder();
           //如果需要POST数据 
           if (!(parameters == null || parameters.Count == 0))
           {
               
               int i = 0;
               foreach (string key in parameters.Keys)
               {
                   if (i > 0)
                   {
                      
                           buffer.AppendFormat("&{0}={1}", key, parameters[key]);
                       
                   }
                   else
                   {
                       if (url.Contains("?"))
                            buffer.AppendFormat("&{0}={1}", key, parameters[key]);
                       else
                       {
                           buffer.AppendFormat("?{0}={1}", key, parameters[key]);
                       }
                   }
                   i++;
               }
                
           }
 
 
           HttpWebRequest request = WebRequest.Create(url + buffer.ToString()) as HttpWebRequest;
           request.Method = "GET";
           request.UserAgent = DefaultUserAgent;
           if (!string.IsNullOrEmpty(userAgent))
           {
               request.UserAgent = userAgent;
           }
           if (timeout.HasValue)
           {
               request.Timeout = timeout.Value; 
               request.ReadWriteTimeout = timeout.Value;
           }
           if (cookies != null)
           {
               request.CookieContainer = new CookieContainer();
               request.CookieContainer.Add(cookies);
           }
 
 
 
 
           return request.GetResponse() as HttpWebResponse;
       }
       /// <summary> 
       /// 创建POST方式的HTTP请求 
       /// </summary> 
       /// <param name="url">请求的URL</param> 
       /// <param name="parameters">随同请求POST的参数名称及参数值字典</param> 
       /// <param name="timeout">请求的超时时间</param> 
       /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param> 
       /// <param name="requestEncoding">发送HTTP请求时所用的编码</param> 
       /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param> 
       /// <returns></returns> 
       public static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters, int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies)
       {
           if (string.IsNullOrEmpty(url))
           {
               throw new ArgumentNullException("url");
           }
           if (requestEncoding == null)
           {
               throw new ArgumentNullException("requestEncoding");
           }
           HttpWebRequest request = null;
           //如果是发送HTTPS请求 
           if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
           {
               ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
               request = WebRequest.Create(url) as HttpWebRequest;
               request.ProtocolVersion = HttpVersion.Version10;
           }
           else
           {
               request = WebRequest.Create(url) as HttpWebRequest;
           }
           request.Method = "POST";
           request.ContentType = "application/x-www-form-urlencoded";
 
           if (!string.IsNullOrEmpty(userAgent))
           {
               request.UserAgent = userAgent;
           }
           else
           {
               request.UserAgent = DefaultUserAgent;
           }
 
           if (timeout.HasValue)
           {
               request.Timeout = timeout.Value;
           }
           if (cookies != null)
           {
               request.CookieContainer = new CookieContainer();
               request.CookieContainer.Add(cookies);
           }
           //如果需要POST数据 
           if (!(parameters == null || parameters.Count == 0))
           {
               StringBuilder buffer = new StringBuilder();
               int i = 0;
               foreach (string key in parameters.Keys)
               {
                   if (i > 0)
                   {
                       buffer.AppendFormat("&{0}={1}", key, parameters[key]);
                   }
                   else
                   {
                       buffer.AppendFormat("{0}={1}", key, parameters[key]);
                   }
                   i++;
               }
               byte[] data = requestEncoding.GetBytes(buffer.ToString());
               using (Stream stream = request.GetRequestStream())
               {
                   stream.Write(data, 0, data.Length);
               }
           }
 
 
           try
           {
               HttpWebResponse res = request.GetResponse() as HttpWebResponse;
               return res;
           }
 
           catch (Exception ex)
           {
 
           }
 
           return request.GetResponse() as HttpWebResponse;
       }
 
       
       private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
       {
           return true; //总是接受 
       }
           
       public static string gb2312Toutf8(string gb2312Str)
       {
 
           System.Text.Encoding GB2312 = System.Text.Encoding.GetEncoding("GB2312");
           System.Text.Encoding UTF8 = System.Text.Encoding.UTF8;
           return UTF8.GetString(GB2312.GetBytes(gb2312Str));
       }
 
       public static string utf8Togb2312(string utf8Str)
       {
           System.Text.Encoding GB2312 = System.Text.Encoding.GetEncoding("GB2312");
           System.Text.Encoding UTF8 = System.Text.Encoding.UTF8;
           return GB2312.GetString(UTF8.GetBytes(utf8Str));
       }
         
   }


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