1     /// <summary>    2     /// 有关HTTP请求的辅助类    3     /// </summary>    4     public class HttpQuery  5     {  6         private static readonly string DefaultUserAgent =  7             "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";  8   9         public static void Get(string url, object data, Action<string> callback) 10         { 11             IDictionary<string, string> parameters = Getparameters(data); 12  13             if (!(parameters == null || parameters.Count == 0)) 14             { 15                 url += "?"; 16                 foreach (var item in parameters) 17                 { 18                     url += item.Key + "=" + item.Value + "&"; 19                 } 20             } 21             CreateGetHttpResponse(url, null, null, null, callback); 22         } 23  24         public static void Post(string url, object data, Action<string> callback) 25         { 26             IDictionary<string, string> parameters = Getparameters(data); 27  28             CreatePostHttpResponse(url, parameters, null, null, Encoding.UTF8, null, callback); 29         } 30  31         public static void Post(string url, string data, Action<string> callback) 32         { 33             CreatePostHttpResponse(url, data, null, null, Encoding.UTF8, null, callback); 34         } 35  36         private static IDictionary<string, string> Getparameters(object data) 37         { 38             if (data =http://www.mamicode.com/= null) 39             { 40                 return new Dictionary<string, string>(); 41             } 42             IDictionary<string, string> parameters = new Dictionary<string, string>(); 43  44             Type type = data.GetType(); 45             PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance); 46             foreach (PropertyInfo p in props) 47             { 48                 parameters.Add(p.Name, p.GetValue(data).ToString()); 49             } 50  51             return parameters; 52         } 53  54         /// <summary>   55         /// 创建GET方式的HTTP请求   56         /// </summary>   57         /// <param name="url">请求的URL</param>   58         /// <param name="timeout">请求的超时时间</param>   59         /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>   60         /// <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>   61         /// <returns></returns>   62         private static HttpWebResponse CreateGetHttpResponse(string url, int? timeout, string userAgent, 63             CookieCollection cookies, Action<string> callback, string encoding = "utf-8") 64         { 65             if (string.IsNullOrEmpty(url)) 66             { 67                 return null; 68                 //throw new ArgumentNullException("url"); 69             } 70             try 71             { 72                 HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; 73                 request.Method = "GET"; 74                 request.UserAgent = DefaultUserAgent; 75                 if (!string.IsNullOrEmpty(userAgent)) 76                 { 77                     request.UserAgent = userAgent; 78                 } 79                 if (timeout.HasValue) 80                 { 81                     request.Timeout = timeout.Value; 82                 } 83                 if (cookies != null) 84                 { 85                     request.CookieContainer = new CookieContainer(); 86                     request.CookieContainer.Add(cookies); 87                 } 88  89                 HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse; 90  91                 StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(), 92                     System.Text.Encoding.GetEncoding(encoding)); 93  94                 string html = ""; 95                 //获取请求到的数据 96                 html = reader.ReadToEnd(); 97                 //关闭 98                 httpWebResponse.Close(); 99                 reader.Close();100 101                 Regex regex = new Regex("charset=(?<code>\\w+)\"");102                 Match match = regex.Match(html);103                 string code = match.Groups["code"].Value;104                 if (!string.IsNullOrWhiteSpace(code) && code.ToLower() != encoding.ToLower())105                 {106                     return CreateGetHttpResponse(url, timeout, userAgent, cookies, callback, code);107                 }108                 else109                 {110                     callback(html);111                     return httpWebResponse;112                 }113             }114             catch115             {116                 callback(null);117             }118             return null;119         }120 121         /// <summary>  122         /// 创建POST方式的HTTP请求  123         /// </summary>  124         /// <param name="url">请求的URL</param>  125         /// <param name="parameters">随同请求POST的参数名称及参数值字典</param>  126         /// <param name="timeout">请求的超时时间</param>  127         /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>  128         /// <param name="requestEncoding">发送HTTP请求时所用的编码</param>  129         /// <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>  130         /// <returns></returns>  131         private static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters,132             int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies, Action<string> callback)133         {134             if (string.IsNullOrEmpty(url))135             {136                 throw new ArgumentNullException("url");137             }138             if (requestEncoding == null)139             {140                 throw new ArgumentNullException("requestEncoding");141             }142             HttpWebRequest request = null;143             try144             {145                 //如果是发送HTTPS请求  146                 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))147                 {148                     ServicePointManager.ServerCertificateValidationCallback =149                         new RemoteCertificateValidationCallback(CheckValidationResult);150                     request = WebRequest.Create(url) as HttpWebRequest;151                     request.ProtocolVersion = HttpVersion.Version10;152                 }153                 else154                 {155                     request = WebRequest.Create(url) as HttpWebRequest;156                 }157                 request.Method = "POST";158                 request.ContentType = "application/x-www-form-urlencoded";159 160                 if (!string.IsNullOrEmpty(userAgent))161                 {162                     request.UserAgent = userAgent;163                 }164                 else165                 {166                     request.UserAgent = DefaultUserAgent;167                 }168 169                 if (timeout.HasValue)170                 {171                     request.Timeout = timeout.Value;172                 }173                 if (cookies != null)174                 {175                     request.CookieContainer = new CookieContainer();176                     request.CookieContainer.Add(cookies);177                 }178                 //如果需要POST数据  179                 if (!(parameters == null || parameters.Count == 0))180                 {181                     StringBuilder buffer = new StringBuilder();182                     int i = 0;183                     foreach (string key in parameters.Keys)184                     {185                         if (i > 0)186                         {187                             buffer.AppendFormat("&{0}={1}", key, parameters[key]);188                         }189                         else190                         {191                             buffer.AppendFormat("{0}={1}", key, parameters[key]);192                         }193                         i++;194                     }195                     byte[] data =http://www.mamicode.com/ requestEncoding.GetBytes(buffer.ToString());196                     using (Stream stream = request.GetRequestStream())197                     {198                         stream.Write(data, 0, data.Length);199                     }200                 }201 202                 HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse;203 204                 StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),205                     System.Text.Encoding.GetEncoding("utf-8"));206 207                 string html = "";208                 //获取请求到的数据209                 html = reader.ReadToEnd();210 211                 //关闭212                 httpWebResponse.Close();213                 reader.Close();214 215                 callback(html);216 217                 return httpWebResponse;218             }219             catch220             {221                 callback(null);222             }223             return null;224         }225 226         private static HttpWebResponse CreatePostHttpResponse(string url, string parameters, int? timeout,227             string userAgent, Encoding requestEncoding, CookieCollection cookies, Action<string> callback)228         {229             if (string.IsNullOrEmpty(url))230             {231                 return null;232                 //throw new ArgumentNullException("url");233             }234             if (requestEncoding == null)235             {236                 throw new ArgumentNullException("requestEncoding");237             }238             HttpWebRequest request = null;239             try240             {241                 //如果是发送HTTPS请求  242                 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))243                 {244                     ServicePointManager.ServerCertificateValidationCallback =245                         new RemoteCertificateValidationCallback(CheckValidationResult);246                     request = WebRequest.Create(url) as HttpWebRequest;247                     request.ProtocolVersion = HttpVersion.Version10;248                 }249                 else250                 {251                     request = WebRequest.Create(url) as HttpWebRequest;252                 }253                 request.Method = "POST";254                 request.ContentType = "application/x-www-form-urlencoded";255 256                 if (!string.IsNullOrEmpty(userAgent))257                 {258                     request.UserAgent = userAgent;259                 }260                 else261                 {262                     request.UserAgent = DefaultUserAgent;263                 }264 265                 if (timeout.HasValue)266                 {267                     request.Timeout = timeout.Value;268                 }269                 if (cookies != null)270                 {271                     request.CookieContainer = new CookieContainer();272                     request.CookieContainer.Add(cookies);273                 }274                 //如果需要POST数据  275                 if (!string.IsNullOrEmpty(parameters))276                 {277                     using (var streamWriter = new StreamWriter(request.GetRequestStream()))278                     {279                         streamWriter.Write(parameters);280                         streamWriter.Flush();281                     }282                 }283 284                 HttpWebResponse httpWebResponse = request.GetResponse() as HttpWebResponse;285 286                 StreamReader reader = new StreamReader(httpWebResponse.GetResponseStream(),287                     System.Text.Encoding.GetEncoding("utf-8"));288 289                 string html = "";290                 //获取请求到的数据291                 html = reader.ReadToEnd();292 293                 //关闭294                 httpWebResponse.Close();295                 reader.Close();296 297                 callback(html);298 299                 return httpWebResponse;300             }301             catch302             {303                 callback(null);304             }305             return null;306         }307 308         private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain,309             SslPolicyErrors errors)310         {311             return true; //总是接受  312         }313 314     }