static CrawlerManager() { httpHelper = new HttpHelper(); item = new HttpItem(); mCanAttemper = true; MaxThreads = 30; }
/// <summary> /// 根据相传入的数据,得到相应页面数据 /// </summary> /// <param name="item">参数类对象</param> /// <returns>返回HttpResult类型</returns> public HttpResult GetHtml(HttpItem item) { //返回参数 HttpResult result = new HttpResult(); try { //准备参数 SetRequest(item); } catch (Exception ex) { //配置参数时出错 return new HttpResult() { Cookie = string.Empty, Header = null, Html = ex.Message, StatusDescription = "配置参数时出错:" + ex.Message }; } try { //请求数据 using (response = (HttpWebResponse)request.GetResponse()) { GetData(item, result); } } catch (WebException ex) { if (ex.Response != null) { using (response = (HttpWebResponse)ex.Response) { GetData(item, result); } } else { result.Html = ex.Message; } } catch (Exception ex) { result.Html = ex.Message; } if (item.IsToLower) result.Html = result.Html.ToLower(); return result; }
/// <summary> /// 为请求准备参数 /// </summary> ///<param name="item">参数列表</param> private void SetRequest(HttpItem item) { // 验证证书 SetCer(item); //设置Header参数 if (item.Header != null && item.Header.Count > 0) foreach (string key in item.Header.AllKeys) { request.Headers.Add(key, item.Header[key]); } // 设置代理 SetProxy(item); if (item.ProtocolVersion != null) request.ProtocolVersion = item.ProtocolVersion; request.ServicePoint.Expect100Continue = item.Expect100Continue; //请求方式Get或者Post request.Method = item.Method; request.Timeout = item.Timeout; request.KeepAlive = item.KeepAlive; request.ReadWriteTimeout = item.ReadWriteTimeout; if (!string.IsNullOrWhiteSpace(item.Host)) { request.Host = item.Host; } if (item.IfModifiedSince != null) request.IfModifiedSince = Convert.ToDateTime(item.IfModifiedSince); //Accept request.Accept = item.Accept; //ContentType返回类型 request.ContentType = item.ContentType; //UserAgent客户端的访问类型,包括浏览器版本和操作系统信息 request.UserAgent = item.UserAgent; // 编码 encoding = item.Encoding; //设置安全凭证 request.Credentials = item.ICredentials; //设置Cookie SetCookie(item); //来源地址 request.Referer = item.Referer; //是否执行跳转功能 request.AllowAutoRedirect = item.Allowautoredirect; if (item.MaximumAutomaticRedirections > 0) { request.MaximumAutomaticRedirections = item.MaximumAutomaticRedirections; } //设置Post数据 SetPostData(item); //设置最大连接 if (item.Connectionlimit > 0) request.ServicePoint.ConnectionLimit = item.Connectionlimit; }
/// <summary> /// 设置代理 /// </summary> /// <param name="item">参数对象</param> private void SetProxy(HttpItem item) { bool isIeProxy = false; if (!string.IsNullOrWhiteSpace(item.ProxyIp)) { isIeProxy = item.ProxyIp.ToLower().Contains("ieproxy"); } if (!string.IsNullOrWhiteSpace(item.ProxyIp) && !isIeProxy) { //设置代理服务器 if (item.ProxyIp.Contains(":")) { string[] plist = item.ProxyIp.Split(':'); WebProxy myProxy = new WebProxy(plist[0].Trim(), Convert.ToInt32(plist[1].Trim())); //建议连接 myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd); //给当前请求对象 request.Proxy = myProxy; } else { WebProxy myProxy = new WebProxy(item.ProxyIp, false); //建议连接 myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd); //给当前请求对象 request.Proxy = myProxy; } } else if (isIeProxy) { //设置为IE代理 } else { request.Proxy = item.WebProxy; } }
/// <summary> /// 设置Post数据 /// </summary> /// <param name="item">Http参数</param> private void SetPostData(HttpItem item) { //验证在得到结果时是否有传入数据 if (!request.Method.Trim().ToLower().Contains("get")) { if (item.PostEncoding != null) { postencoding = item.PostEncoding; } byte[] buffer = null; //写入Byte类型 if (item.PostDataType == PostDataType.Byte && item.PostdataByte != null && item.PostdataByte.Length > 0) { //验证在得到结果时是否有传入数据 buffer = item.PostdataByte; }//写入文件 else if (item.PostDataType == PostDataType.FilePath && !string.IsNullOrWhiteSpace(item.Postdata)) { StreamReader r = new StreamReader(item.Postdata, postencoding); buffer = postencoding.GetBytes(r.ReadToEnd()); r.Close(); } //写入字符串 else if (!string.IsNullOrWhiteSpace(item.Postdata)) { buffer = postencoding.GetBytes(item.Postdata); } if (buffer != null) { request.ContentLength = buffer.Length; request.GetRequestStream().Write(buffer, 0, buffer.Length); } } }
/// <summary> /// 设置编码 /// </summary> /// <param name="item">HttpItem</param> /// <param name="result">HttpResult</param> /// <param name="ResponseByte">byte[]</param> private void SetEncoding(HttpItem item, HttpResult result, byte[] ResponseByte) { //是否返回Byte类型数据 if (item.ResultType == ResultType.Byte) result.ResultByte = ResponseByte; //从这里开始我们要无视编码了 if (encoding == null) { Match meta = Regex.Match(Encoding.Default.GetString(ResponseByte), "<meta[^<]*charset=([^<]*)[\"']", RegexOptions.IgnoreCase); string c = string.Empty; if (meta != null && meta.Groups.Count > 0) { c = meta.Groups[1].Value.ToLower().Trim(); } if (c.Length > 2) { try { encoding = Encoding.GetEncoding(c.Replace("\"", string.Empty).Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk").Trim()); } catch { if (string.IsNullOrEmpty(response.CharacterSet)) { encoding = Encoding.UTF8; } else { encoding = Encoding.GetEncoding(response.CharacterSet); } } } else { if (string.IsNullOrEmpty(response.CharacterSet)) { encoding = Encoding.UTF8; } else { encoding = Encoding.GetEncoding(response.CharacterSet); } } } }
/// <summary> /// 设置Cookie /// </summary> /// <param name="item">Http参数</param> private void SetCookie(HttpItem item) { if (!string.IsNullOrEmpty(item.Cookie)) request.Headers[HttpRequestHeader.Cookie] = item.Cookie; //设置CookieCollection if (item.ResultCookieType == ResultCookieType.CookieCollection) { request.CookieContainer = new CookieContainer(); if (item.CookieCollection != null && item.CookieCollection.Count > 0) request.CookieContainer.Add(item.CookieCollection); } }
/// <summary> /// 设置多个证书 /// </summary> /// <param name="item"></param> private void SetCerList(HttpItem item) { if (item.ClentCertificates != null && item.ClentCertificates.Count > 0) { foreach (X509Certificate c in item.ClentCertificates) { request.ClientCertificates.Add(c); } } }
/// <summary> /// 设置证书 /// </summary> /// <param name="item"></param> private void SetCer(HttpItem item) { if (!string.IsNullOrWhiteSpace(item.CerPath)) { //这一句一定要写在创建连接的前面。使用回调的方法进行证书验证。 ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult); //初始化对像,并设置请求的URL地址 request = (HttpWebRequest)WebRequest.Create(item.URL); SetCerList(item); //将证书添加到请求里 request.ClientCertificates.Add(new X509Certificate(item.CerPath)); } else { //初始化对像,并设置请求的URL地址 request = (HttpWebRequest)WebRequest.Create(item.URL); SetCerList(item); } }
/// <summary> /// 获取数据的并解析的方法 /// </summary> /// <param name="item"></param> /// <param name="result"></param> private void GetData(HttpItem item, HttpResult result) { #region base //获取StatusCode result.StatusCode = response.StatusCode; //获取StatusDescription result.StatusDescription = response.StatusDescription; //获取Headers result.Header = response.Headers; //获取CookieCollection if (response.Cookies != null) result.CookieCollection = response.Cookies; //获取set-cookie if (response.Headers["set-cookie"] != null) result.Cookie = response.Headers["set-cookie"]; #endregion #region byte //处理网页Byte byte[] ResponseByte = GetByte(); #endregion #region Html if (ResponseByte != null & ResponseByte.Length > 0) { //设置编码 SetEncoding(item, result, ResponseByte); //得到返回的HTML result.Html = encoding.GetString(ResponseByte); } else { //没有返回任何Html代码 result.Html = string.Empty; } #endregion }
/// <summary> /// 设置代理 /// </summary> /// <param name="item">参数对象</param> private void SetProxy(HttpItem item) { if (!string.IsNullOrWhiteSpace(item.ProxyIp)) { //设置代理服务器 if (item.ProxyIp.Contains(":")) { string[] plist = item.ProxyIp.Split(':'); WebProxy myProxy = new WebProxy(plist[0].Trim(), Convert.ToInt32(plist[1].Trim())); //建议连接 myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd); //给当前请求对象 request.Proxy = myProxy; } else { WebProxy myProxy = new WebProxy(item.ProxyIp, false); //建议连接 myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd); //给当前请求对象 request.Proxy = myProxy; } request.Credentials = CredentialCache.DefaultCredentials; } else if (item.WebProxy != null) { request.Proxy = item.WebProxy; } }
/// <summary> /// 根据相传入的数据,得到相应页面数据 /// </summary> /// <param name="item">参数类对象</param> /// <returns>返回HttpResult类型</returns> public HttpResult GetHtml(HttpItem item) { //返回参数 HttpResult result = new HttpResult(); try { //准备参数 SetRequest(item); } catch (Exception ex) { return new HttpResult() { Cookie = string.Empty, Header = null, Html = ex.Message, StatusDescription = "配置参数时出错:" + ex.Message }; } try { #region 得到请求的response using (response = (HttpWebResponse)request.GetResponse()) { result.StatusCode = response.StatusCode; result.StatusDescription = response.StatusDescription; result.Header = response.Headers; if (response.Cookies != null) result.CookieCollection = response.Cookies; if (response.Headers["set-cookie"] != null) result.Cookie = response.Headers["set-cookie"]; byte[] ResponseByte = null; using (MemoryStream _stream = new MemoryStream()) { //GZIIP处理 if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase)) { //开始读取流并设置编码方式 new GZipStream(response.GetResponseStream(), CompressionMode.Decompress).CopyTo(_stream, 10240); } else { //开始读取流并设置编码方式 response.GetResponseStream().CopyTo(_stream, 10240); } //获取Byte ResponseByte = _stream.ToArray(); } if (ResponseByte != null & ResponseByte.Length > 0) { //是否返回Byte类型数据 if (item.ResultType == ResultType.Byte) result.ResultByte = ResponseByte; //从这里开始我们要无视编码了 if (encoding == null) { Match meta = Regex.Match(Encoding.Default.GetString(ResponseByte), "<meta([^<]*)charset=([^<]*)[\"']", RegexOptions.IgnoreCase); string c = (meta.Groups.Count > 1) ? meta.Groups[2].Value.ToLower().Trim() : string.Empty; if (c.Length > 2) { try { if (c.IndexOf(" ") > 0) c = c.Substring(0, c.IndexOf(" ")); encoding = Encoding.GetEncoding(c.Replace("\"", "").Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk").Trim()); } catch { if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8; else encoding = Encoding.GetEncoding(response.CharacterSet); } } else { if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8; else encoding = Encoding.GetEncoding(response.CharacterSet); } } //得到返回的HTML result.Html = encoding.GetString(ResponseByte); } else { //得到返回的HTML result.Html = "本次请求并未返回任何数据"; } } #endregion } catch (WebException ex) { //这里是在发生异常时返回的错误信息 response = (HttpWebResponse)ex.Response; result.Html = ex.Message; if (response != null) { result.StatusCode = response.StatusCode; result.StatusDescription = response.StatusDescription; } } catch (Exception ex) { result.Html = ex.Message; } if (item.IsToLower) result.Html = result.Html.ToLower(); return result; }
private static string GetHtml(string url) { HttpHelper http = new HttpHelper(); HttpItem item = new HttpItem() { URL = url,// "http://www.shgtj.gov.cn/2011/gcjsxx/xmxx/ghxzyj/",//URL 必需项 Method = "get",//URL 可选项 默认为Get IsToLower = false,//得到的HTML代码是否转成小写 可选项默认转小写 Cookie = "",//字符串Cookie 可选项 Referer = "",//来源URL 可选项 Postdata = "",//Post数据 可选项GET时不需要写 Timeout = 100000,//连接超时时间 可选项默认为100000 ReadWriteTimeout = 30000,//写入Post数据超时时间 可选项默认为30000 UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",//用户的浏览器类型,版本,操作系统 可选项有默认值 ContentType = "text/html",//返回类型 可选项有默认值 Allowautoredirect = false,//是否根据301跳转 可选项 //CerPath = "d:\123.cer",//证书绝对路径 可选项不需要证书时可以不写这个参数 //Connectionlimit = 1024,//最大连接数 可选项 默认为1024 ProxyIp = "",//代理服务器ID 可选项 不需要代理 时可以不设置这三个参数 //ProxyPwd = "123456",//代理服务器密码 可选项 //ProxyUserName = "******",//代理服务器账户名 可选项 ResultType = ResultType.String }; HttpResult result = http.GetHtml(item); return result.Html; }
/// <summary> /// 获取有权限的门禁列表 /// </summary> /// <param name="row"></param> /// <returns></returns> private string GetDoorList(DataRow row) { #region 获取基本传参 string CommID = string.Empty; if (row.Table.Columns.Contains("CommID")) { CommID = row["CommID"].ToString(); } string RoomID = string.Empty; if (row.Table.Columns.Contains("RoomID")) { RoomID = row["RoomID"].ToString(); } #endregion #region 获取小区配置和房间配置 Tb_Community tb_Community = GetCommunityByCommID(CommID); if (null == tb_Community) { return(new ApiResult(false, "未配置该小区").toJson()); } string erpConnStr = GetConnectionStr(tb_Community); LiLingEntranceConfig lilingEntranceConfig = null; dynamic RoomConfig = null; using (IDbConnection conn = new SqlConnection(erpConnStr)) { dynamic Config = conn.QueryFirstOrDefault("SELECT * FROM Tb_LiLing_Entrance_Config WHERE CommID = @CommID", new { CommID }); if (null == Config) { return(new ApiResult(false, "该小区未配置门禁信息").toJson()); } try { lilingEntranceConfig = JsonConvert.DeserializeObject <LiLingEntranceConfig>(Convert.ToString(Config.Config)); } catch (Exception) { return(new ApiResult(false, "门禁配置信息有误").toJson()); } if (null == lilingEntranceConfig) { return(new ApiResult(false, "门禁配置信息为空").toJson()); } RoomConfig = conn.QueryFirstOrDefault("SELECT CallNum,BlueNum,QRCodeNum FROM Tb_LiLing_Entrance_Room WHERE CommID = @CommID AND RoomID = @RoomID", new { CommID, RoomID }); if (null == RoomConfig) { return(new ApiResult(false, "房间权限配置信息为空").toJson()); } } string SERVER_URL = lilingEntranceConfig.ServerUrl; string CLIENT_USERNAME = lilingEntranceConfig.ClientUserName; string CLIENT_OSTYPE = lilingEntranceConfig.ClientOSType; string CLIENT_ID = lilingEntranceConfig.ClientID; string CLIENT_SECRET = lilingEntranceConfig.ClientSecret; #endregion #region 获取AccessToken string access_token = string.Empty; string sessionId = string.Empty; string Cookie = string.Empty; try { string param = $"client_id={CLIENT_ID}&client_secret={CLIENT_SECRET}&grant_type=client_credentials&userName={CLIENT_USERNAME}&osType={CLIENT_OSTYPE}"; HttpHelper http = new HttpHelper(); HttpItem item = new HttpItem() { URL = SERVER_URL + "/rest/accesstoken/getAccessToken", //URL 必需项 Method = "POST", //URL 可选项 默认为Get Timeout = 3000, //连接超时时间 可选项默认为100000 ReadWriteTimeout = 3000, //写入Post数据超时时间 可选项默认为30000 IsToLower = false, //得到的HTML代码是否转成小写 可选项默认转小写 ContentType = "application/x-www-form-urlencoded", PostEncoding = Encoding.UTF8, Cookie = Cookie, Postdata = param, //Post数据 可选项GET时不需要写 ResultType = ResultType.String, //返回数据类型,是Byte还是String ProtocolVersion = HttpVersion.Version11, //获取或设置用于请求的 HTTP 版本。默认为 System.Net.HttpVersion.Version11 }; HttpResult result = http.GetHtml(item); JObject jObj = JsonConvert.DeserializeObject <JObject>(result.Html); if (!"1".Equals(jObj["code"].ToString()) || !"success".Equals(jObj["state"].ToString())) { GetLog().Debug("LiLingEntrance:获取AccessToken失败:" + JsonConvert.SerializeObject(jObj)); return(new ApiResult(false, "获取AccessToken失败,请重试").toJson()); } access_token = (string)jObj["access_token"]; sessionId = (string)jObj["sessionId"]; Cookie = $"JSESSIONID={sessionId}"; } catch (Exception ex) { GetLog().Error(ex.Message + Environment.CommandLine + ex.StackTrace); return(new ApiResult(false, "获取AccessToken异常,请重试").toJson()); } #endregion #region 获取本项目蓝牙门禁信息 string neigh_no = lilingEntranceConfig.NeighStructure; List <string> DoorList = new List <string>(); try { string param = $"access_token={access_token}&neigh_no={neigh_no}"; HttpHelper http = new HttpHelper(); HttpItem item = new HttpItem() { URL = SERVER_URL + "/rest/api/third/getDoorList", //URL 必需项 Method = "POST", //URL 可选项 默认为Get Timeout = 3000, //连接超时时间 可选项默认为100000 ReadWriteTimeout = 3000, //写入Post数据超时时间 可选项默认为30000 IsToLower = false, //得到的HTML代码是否转成小写 可选项默认转小写 ContentType = "application/x-www-form-urlencoded", PostEncoding = Encoding.UTF8, Cookie = Cookie, Postdata = param, //Post数据 可选项GET时不需要写 ResultType = ResultType.String, //返回数据类型,是Byte还是String ProtocolVersion = HttpVersion.Version11, //获取或设置用于请求的 HTTP 版本。默认为 System.Net.HttpVersion.Version11 }; HttpResult result = http.GetHtml(item); JObject jObj = JsonConvert.DeserializeObject <JObject>(result.Html); if (!"1".Equals(jObj["code"].ToString()) || !"success".Equals(jObj["state"].ToString())) { GetLog().Debug("LiLingEntrance:获取小区门禁列表失败:" + JsonConvert.SerializeObject(jObj)); return(new ApiResult(false, "获取小区门禁列表失败,请重试").toJson()); } JArray door_list = (JArray)jObj["door_list"]; if (null != door_list) { foreach (JObject door in door_list) { DoorList.Add(door["door_name"].ToString()); } } } catch (Exception ex) { GetLog().Error(ex.Message + Environment.CommandLine + ex.StackTrace); return(new ApiResult(false, "获取小区门禁列表异常,请重试").toJson()); } #endregion return(new ApiResult(true, new { RoomConfig = RoomConfig, DoorList = DoorList }).toJson()); }
/// <summary> /// 为请求准备参数 /// </summary> ///<param name="item">参数列表</param> private void SetRequest(HttpItem item) { // 验证证书 SetCer(item); if (item.IPEndPoint != null) { _IPEndPoint = item.IPEndPoint; //设置本地的出口ip和端口 request.ServicePoint.BindIPEndPointDelegate = new BindIPEndPoint(BindIPEndPointCallback); } //设置Header参数 if (item.Header != null && item.Header.Count > 0) { foreach (string key in item.Header.AllKeys) { request.Headers.Add(key, item.Header[key]); } } // 设置代理 SetProxy(item); if (item.ProtocolVersion != null) { request.ProtocolVersion = item.ProtocolVersion; } request.ServicePoint.Expect100Continue = item.Expect100Continue; //请求方式Get或者Post request.Method = item.Method; request.Timeout = item.Timeout; request.KeepAlive = item.KeepAlive; request.ReadWriteTimeout = item.ReadWriteTimeout; if (!string.IsNullOrWhiteSpace(item.Host)) { request.Host = item.Host; } if (item.IfModifiedSince != null) { request.IfModifiedSince = Convert.ToDateTime(item.IfModifiedSince); } //Accept request.Accept = item.Accept; //ContentType返回类型 request.ContentType = item.ContentType; //UserAgent客户端的访问类型,包括浏览器版本和操作系统信息 request.UserAgent = item.UserAgent; // 编码 encoding = item.Encoding; //设置安全凭证 request.Credentials = item.ICredentials; //设置Cookie SetCookie(item); //来源地址 request.Referer = item.Referer; //是否执行跳转功能 request.AllowAutoRedirect = item.Allowautoredirect; if (item.MaximumAutomaticRedirections > 0) { request.MaximumAutomaticRedirections = item.MaximumAutomaticRedirections; } //设置Post数据 SetPostData(item); //设置最大连接 if (item.Connectionlimit > 0) { request.ServicePoint.ConnectionLimit = item.Connectionlimit; } }
/// <summary> /// 根据相传入的数据,得到相应页面数据 /// </summary> /// <param name="item">参数类对象</param> /// <returns>返回HttpResult类型</returns> public HttpResult GetHtml(HttpItem item) { //返回参数 HttpResult result = new HttpResult(); try { //准备参数 SetRequest(item); } catch (Exception ex) { return(new HttpResult() { Cookie = string.Empty, Header = null, Html = ex.Message, StatusDescription = "配置参数时出错:" + ex.Message }); } try { #region 得到请求的response using (response = (HttpWebResponse)request.GetResponse()) { result.StatusCode = response.StatusCode; result.StatusDescription = response.StatusDescription; result.Header = response.Headers; if (response.Cookies != null) { result.CookieCollection = response.Cookies; } if (response.Headers["set-cookie"] != null) { result.Cookie = response.Headers["set-cookie"]; } byte[] ResponseByte = null; using (MemoryStream _stream = new MemoryStream()) { //GZIIP处理 if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase)) { //开始读取流并设置编码方式 new GZipStream(response.GetResponseStream(), CompressionMode.Decompress).CopyTo(_stream, 10240); } else { //开始读取流并设置编码方式 response.GetResponseStream().CopyTo(_stream, 10240); } //获取Byte ResponseByte = _stream.ToArray(); } if (ResponseByte != null & ResponseByte.Length > 0) { //是否返回Byte类型数据 if (item.ResultType == ResultType.Byte) { result.ResultByte = ResponseByte; } //从这里开始我们要无视编码了 if (encoding == null) { Match meta = Regex.Match(Encoding.Default.GetString(ResponseByte), "<meta([^<]*)charset=([^<]*)[\"']", RegexOptions.IgnoreCase); string c = (meta.Groups.Count > 1) ? meta.Groups[2].Value.ToLower().Trim() : string.Empty; if (c.Length > 2) { try { if (c.IndexOf(" ") > 0) { c = c.Substring(0, c.IndexOf(" ")); } encoding = Encoding.GetEncoding(c.Replace("\"", "").Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk").Trim()); } catch { if (string.IsNullOrEmpty(response.CharacterSet)) { encoding = Encoding.UTF8; } else { encoding = Encoding.GetEncoding(response.CharacterSet); } } } else { if (string.IsNullOrEmpty(response.CharacterSet)) { encoding = Encoding.UTF8; } else { encoding = Encoding.GetEncoding(response.CharacterSet); } } } //得到返回的HTML result.Html = encoding.GetString(ResponseByte); } else { //得到返回的HTML result.Html = "本次请求并未返回任何数据"; } } #endregion } catch (WebException ex) { //这里是在发生异常时返回的错误信息 response = (HttpWebResponse)ex.Response; result.Html = ex.Message; if (response != null) { result.StatusCode = response.StatusCode; result.StatusDescription = response.StatusDescription; } } catch (Exception ex) { result.Html = ex.Message; } if (item.IsToLower) { result.Html = result.Html.ToLower(); } return(result); }