Request 操作类

 

Request

  1using System;
  2using System.Web;
  3using System.Text;
  4using System.Text.RegularExpressions;
  5
  6namespace ChinaValue.CommonV2008
  7{
  8    /**//// <summary>
  9    /// Request操作类
 10    /// </summary>
 11    public class CVRequest
 12    {
 13        /**//// <summary>
 14        /// 判断当前页面是否接收到了Post请求
 15        /// </summary>
 16        /// <returns>是否接收到了Post请求</returns>
 17        public static Boolean IsPost()
 18        {
 19            return HttpContext.Current.Request.HttpMethod.Equals("POST");
 20        }
 21
 22        /**//// <summary>
 23        /// 判断当前页面是否接收到了Get请求
 24        /// </summary>
 25        /// <returns>是否接收到了Get请求</returns>
 26        public static Boolean IsGet()
 27        {
 28            return HttpContext.Current.Request.HttpMethod.Equals("GET");
 29        }
 30
 31        /**//// <summary>
 32        /// 返回指定的服务器变量信息
 33        /// </summary>
 34        /// <param name="strName">服务器变量名</param>
 35        /// <returns>服务器变量信息</returns>
 36        public static String GetServerString(string strName)
 37        {
 38            if (HttpContext.Current.Request.ServerVariables[strName] == null)
 39            {
 40                return String.Empty;
 41            }
 42
 43            return HttpContext.Current.Request.ServerVariables[strName].ToString();
 44        }
 45
 46        /**//// <summary>
 47        /// 返回上一个页面的地址
 48        /// </summary>
 49        /// <returns>上一个页面的地址</returns>
 50        public static String GetUrlReferrer()
 51        {
 52            String retVal = null;
 53
 54            try
 55            {
 56                retVal = HttpContext.Current.Request.UrlReferrer.ToString();
 57            }
 58            catch { }
 59
 60            if (retVal == null)
 61                return String.Empty;
 62
 63            return retVal;
 64
 65        }
 66
 67        /**//// <summary>
 68        /// 得到当前完整主机头
 69        /// </summary>
 70        /// <returns></returns>
 71        public static String GetCurrentFullHost()
 72        {
 73            HttpRequest request = System.Web.HttpContext.Current.Request;
 74
 75            if (!request.Url.IsDefaultPort)
 76            {
 77                return string.Format("{0}:{1}", request.Url.Host, request.Url.Port.ToString());
 78            }
 79
 80            return request.Url.Host;
 81        }
 82
 83        /**//// <summary>
 84        /// 得到主机头
 85        /// </summary>
 86        /// <returns></returns>
 87        public static String GetHost()
 88        {
 89            return HttpContext.Current.Request.Url.Host;
 90        }
 91
 92        /**//// <summary>
 93        /// 获取当前请求的原始 URL(URL 中域信息之后的部分,包括查询字符串(如果存在))
 94        /// </summary>
 95        /// <returns>原始 URL</returns>
 96        public static String GetRawUrl()
 97        {
 98            return HttpContext.Current.Request.RawUrl;
 99        }
100
101        /**//// <summary>
102        /// 判断当前访问是否来自浏览器软件
103        /// </summary>
104        /// <returns>当前访问是否来自浏览器软件</returns>
105        public static Boolean IsBrowserGet()
106        {
107            String[] BrowserName = { "ie", "opera", "netscape", "mozilla" };
108            String curBrowser = HttpContext.Current.Request.Browser.Type.ToLower();
109
110            for (Int32 i = 0; i < BrowserName.Length; i++)
111            {
112                if (curBrowser.IndexOf(BrowserName[i]) >= 0)
113                {
114                    return true;
115                }
116            }
117
118            return false;
119        }
120
121        /**//// <summary>
122        /// 判断是否来自搜索引擎链接
123        /// </summary>
124        /// <returns>是否来自搜索引擎链接</returns>
125        public static Boolean IsSearchEnginesGet()
126        {
127            String[] SearchEngine = { "google", "yahoo", "msn", "baidu", "sogou", "sohu", "sina", "163", "lycos", "tom" };
128            String tmpReferrer = HttpContext.Current.Request.UrlReferrer.ToString().ToLower();
129
130            for (int i = 0; i < SearchEngine.Length; i++)
131            {
132                if (tmpReferrer.IndexOf(SearchEngine[i]) >= 0)
133                {
134                    return true;
135                }
136            }
137
138            return false;
139        }
140
141        /**//// <summary>
142        /// 获得当前完整Url地址
143        /// </summary>
144        /// <returns>当前完整Url地址</returns>
145        public static String GetUrl()
146        {
147            return HttpContext.Current.Request.Url.ToString();
148        }
149
150        /**//// <summary>
151        /// 获得指定Url参数的值（过滤SQL注入字符）
152        /// </summary>
153        /// <param name="strName">Url参数</param>
154        /// <returns>Url参数的值</returns>
155        public static String GetQueryString(String strName)
156        {
157            return GetQueryString(strName, true);
158        }
159
160        /**//// <summary>
161        /// 获得指定Url参数的值
162        /// </summary>
163        /// <param name="strName">Url参数</param>
164        /// <param name="dropInjWords">是否过滤SQL注入字符</param>
165        /// <returns>Url参数的值</returns>
166        public static String GetQueryString(String strName, Boolean dropInjWords)
167        {
168            if (HttpContext.Current.Request.QueryString[strName] == null)
169            {
170                return String.Empty;
171            }
172
173            String queryStr = HttpContext.Current.Request.QueryString[strName];
174
175            if (dropInjWords)
176            {
177                return DropInjectionWords(queryStr);
178            }
179
180            return queryStr;
181        }
182
183        /**//// <summary>
184        /// 过滤SQL注入的字符
185        /// </summary>
186        /// <param name="str"></param>
187        /// <returns></returns>
188        public static String DropInjectionWords(String str)
189        {
190            StringBuilder sb = new StringBuilder(str);
191
192            sb = sb.Replace(";", "；");
193            sb = sb.Replace("'", "’");
194
195            if (Regex.IsMatch(sb.ToString(), @"\s*select\s+"))
196            {
197                sb = sb.Replace("select", "ｓｅｌｅｃｔ");
198            }
199
200            if (Regex.IsMatch(sb.ToString(), @"\s*and\s+"))
201            {
202                sb = sb.Replace("and", "ａｎｄ");
203            }
204            //sb = sb.Replace("=", "＝");
205
206            return sb.ToString();
207        }
208
209        /**//// <summary>
210        /// 获得当前页面的名称
211        /// </summary>
212        /// <returns>当前页面的名称</returns>
213        public static String GetPageName()
214        {
215            string[] urlArr = HttpContext.Current.Request.Url.AbsolutePath.Split('/');
216            return urlArr[urlArr.Length - 1].ToLower();
217        }
218
219        /**//// <summary>
220        /// 返回表单或Url参数的总个数
221        /// </summary>
222        /// <returns></returns>
223        public static Int32 GetParamCount()
224        {
225            return HttpContext.Current.Request.Form.Count + HttpContext.Current.Request.QueryString.Count;
226        }
227
228        /**//// <summary>
229        /// 获得指定表单参数的值（过滤SQL注入字符）
230        /// </summary>
231        /// <param name="strName">表单参数</param>
232        /// <returns>表单参数的值</returns>
233        public static String GetFormString(String strName)
234        {
235            return GetFormString(strName, true);
236        }
237
238        /**//// <summary>
239        /// 获得指定表单参数的值
240        /// </summary>
241        /// <param name="strName">表单参数</param>
242        /// <param name="dropInjWords">是否过滤SQL注入字符</param>
243        /// <returns>表单参数的值</returns>
244        public static String GetFormString(String strName, Boolean dropInjWords)
245        {
246            if (HttpContext.Current.Request.Form[strName] == null)
247            {
248                return String.Empty;
249            }
250
251            String fromStr = HttpContext.Current.Request.Form[strName];
252
253            if (dropInjWords)
254            {
255                return DropInjectionWords(fromStr);
256            }
257
258            return fromStr;
259        }
260
261        /**//// <summary>
262        /// 获得Url或表单参数的值, 先判断Url参数是否为空字符串, 如为True则返回表单参数的值（过滤SQL注入字符）
263        /// </summary>
264        /// <param name="strName">参数</param>
265        /// <returns>Url或表单参数的值</returns>
266        public static String GetString(String strName)
267        {
268            if ("".Equals(GetQueryString(strName)))
269            {
270                return GetFormString(strName);
271            }
272            else
273            {
274                return GetQueryString(strName);
275            }
276        }
277
278        /**//// <summary>
279        /// 获得Url或表单参数的值, 先判断Url参数是否为空字符串, 如为True则返回表单参数的值
280        /// </summary>
281        /// <param name="strName">参数</param>
282        /// <param name="dropInjWords">是否过滤SQL注入字符</param>
283        /// <returns>Url或表单参数的值</returns>
284        public static String GetString(String strName, Boolean dropInjWords)
285        {
286            if ("".Equals(GetQueryString(strName)))
287            {
288                return GetFormString(strName, dropInjWords);
289            }
290            else
291            {
292                return GetQueryString(strName, dropInjWords);
293            }
294        }
295
296        /**//// <summary>
297        /// 获得指定Url参数的int类型值
298        /// </summary>
299        /// <param name="strName">Url参数</param>
300        /// <param name="defValue">缺省值</param>
301        /// <returns>Url参数的int类型值</returns>
302        public static Int32 GetQueryInt(String strName, Int32 defValue)
303        {
304            return ConvertStr.ToInt32(HttpContext.Current.Request.QueryString[strName], defValue);
305        }
306
307        /**//// <summary>
308        /// 获得指定表单参数的int类型值
309        /// </summary>
310        /// <param name="strName">表单参数</param>
311        /// <param name="defValue">缺省值</param>
312        /// <returns>表单参数的int类型值</returns>
313        public static Int32 GetFormInt(string strName, int defValue)
314        {
315            return ConvertStr.ToInt32(HttpContext.Current.Request.Form[strName], defValue);
316        }
317
318        /**//// <summary>
319        /// 获得指定Url或表单参数的int类型值, 先判断Url参数是否为缺省值, 如为True则返回表单参数的值
320        /// </summary>
321        /// <param name="strName">Url或表单参数</param>
322        /// <param name="defValue">缺省值</param>
323        /// <returns>Url或表单参数的int类型值</returns>
324        public static Int32 GetInt(string strName, int defValue)
325        {
326            if (GetQueryInt(strName, defValue) == defValue)
327            {
328                return GetFormInt(strName, defValue);
329            }
330            else
331            {
332                return GetQueryInt(strName, defValue);
333            }
334        }
335
336        /**//// <summary>
337        /// 获得指定Url参数的float类型值
338        /// </summary>
339        /// <param name="strName">Url参数</param>
340        /// <param name="defValue">缺省值</param>
341        /// <returns>Url参数的int类型值</returns>
342        public static float GetQueryFloat(string strName, float defValue)
343        {
344            return ConvertStr.ToFloat(HttpContext.Current.Request.QueryString[strName], defValue);
345        }
346
347
348        /**//// <summary>
349        /// 获得指定表单参数的float类型值
350        /// </summary>
351        /// <param name="strName">表单参数</param>
352        /// <param name="defValue">缺省值</param>
353        /// <returns>表单参数的float类型值</returns>
354        public static float GetFormFloat(string strName, float defValue)
355        {
356            return ConvertStr.ToFloat(HttpContext.Current.Request.Form[strName], defValue);
357        }
358
359        /**//// <summary>
360        /// 获得指定Url或表单参数的float类型值, 先判断Url参数是否为缺省值, 如为True则返回表单参数的值
361        /// </summary>
362        /// <param name="strName">Url或表单参数</param>
363        /// <param name="defValue">缺省值</param>
364        /// <returns>Url或表单参数的int类型值</returns>
365        public static float GetFloat(string strName, float defValue)
366        {
367            if (GetQueryFloat(strName, defValue) == defValue)
368            {
369                return GetFormFloat(strName, defValue);
370            }
371            else
372            {
373                return GetQueryFloat(strName, defValue);
374            }
375        }
376
377        /**//// <summary>
378        /// 获得当前页面客户端的IP
379        /// </summary>
380        /// <returns>当前页面客户端的IP</returns>
381        public static String GetIP()
382        {
383            String result = String.Empty;
384
385            result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
386
387            if (null == result || result == String.Empty)
388            {
389                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
390            }
391
392            if (null == result || result == String.Empty)
393            {
394                result = HttpContext.Current.Request.UserHostAddress;
395            }
396
397            if (null == result || result == String.Empty)
398            {
399                return "0.0.0.0";
400            }
401
402            return result;
403        }
404    }
405}