/*******************************************************************************
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*********************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Net;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Web;
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namespace Common
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{
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public partial class WebHelper
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{
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#region ResolveUrl(解析相对Url)
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/// <summary>
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/// 解析相对Url
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/// </summary>
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/// <param name="relativeUrl">相对Url</param>
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public static string ResolveUrl(string relativeUrl)
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{
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if (string.IsNullOrWhiteSpace(relativeUrl))
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return string.Empty;
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relativeUrl = relativeUrl.Replace("\\", "/");
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if (relativeUrl.StartsWith("/"))
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return relativeUrl;
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if (relativeUrl.Contains("://"))
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return relativeUrl;
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return VirtualPathUtility.ToAbsolute(relativeUrl);
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}
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#endregion
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#region HtmlEncode(对html字符串进行编码)
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/// <summary>
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/// 对html字符串进行编码
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/// </summary>
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/// <param name="html">html字符串</param>
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public static string HtmlEncode(string html)
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{
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return HttpUtility.HtmlEncode(html);
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}
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/// <summary>
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/// 对html字符串进行解码
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/// </summary>
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/// <param name="html">html字符串</param>
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public static string HtmlDecode(string html)
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{
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return HttpUtility.HtmlDecode(html);
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}
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#endregion
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#region UrlEncode(对Url进行编码)
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/// <summary>
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/// 对Url进行编码
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/// </summary>
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/// <param name="url">url</param>
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/// <param name="isUpper">编码字符是否转成大写,范例,"http://"转成"http%3A%2F%2F"</param>
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public static string UrlEncode(string url, bool isUpper = false)
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{
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return UrlEncode(url, Encoding.UTF8, isUpper);
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}
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/// <summary>
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/// 对Url进行编码
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/// </summary>
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/// <param name="url">url</param>
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/// <param name="encoding">字符编码</param>
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/// <param name="isUpper">编码字符是否转成大写,范例,"http://"转成"http%3A%2F%2F"</param>
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public static string UrlEncode(string url, Encoding encoding, bool isUpper = false)
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{
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var result = HttpUtility.UrlEncode(url, encoding);
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if (!isUpper)
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return result;
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return GetUpperEncode(result);
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}
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/// <summary>
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/// 获取大写编码字符串
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/// </summary>
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private static string GetUpperEncode(string encode)
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{
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var result = new StringBuilder();
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int index = int.MinValue;
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for (int i = 0; i < encode.Length; i++)
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{
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string character = encode[i].ToString();
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if (character == "%")
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index = i;
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if (i - index == 1 || i - index == 2)
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character = character.ToUpper();
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result.Append(character);
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}
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return result.ToString();
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}
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#endregion
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#region UrlDecode(对Url进行解码)
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/// <summary>
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/// 对Url进行解码,对于javascript的encodeURIComponent函数编码参数,应使用utf-8字符编码来解码
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/// </summary>
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/// <param name="url">url</param>
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public static string UrlDecode(string url)
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{
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return HttpUtility.UrlDecode(url);
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}
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/// <summary>
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/// 对Url进行解码,对于javascript的encodeURIComponent函数编码参数,应使用utf-8字符编码来解码
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/// </summary>
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/// <param name="url">url</param>
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/// <param name="encoding">字符编码,对于javascript的encodeURIComponent函数编码参数,应使用utf-8字符编码来解码</param>
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public static string UrlDecode(string url, Encoding encoding)
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{
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return HttpUtility.UrlDecode(url, encoding);
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}
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#endregion
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#region Session操作
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/// <summary>
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/// 写Session
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/// </summary>
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/// <typeparam name="T">Session键值的类型</typeparam>
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/// <param name="key">Session的键名</param>
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/// <param name="value">Session的键值</param>
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public static void WriteSession<T>(string key, T value)
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{
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if (key.IsEmpty())
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return;
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HttpContext.Current.Session[key] = value;
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}
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/// <summary>
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/// 写Session
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/// </summary>
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/// <param name="key">Session的键名</param>
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/// <param name="value">Session的键值</param>
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public static void WriteSession(string key, string value)
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{
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WriteSession<string>(key, value);
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}
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/// <summary>
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/// 读取Session的值
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/// </summary>
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/// <param name="key">Session的键名</param>
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public static string GetSession(string key)
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{
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if (key.IsEmpty())
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return string.Empty;
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return HttpContext.Current.Session[key] as string;
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}
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/// <summary>
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/// 删除指定Session
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/// </summary>
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/// <param name="key">Session的键名</param>
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public static void RemoveSession(string key)
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{
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if (key.IsEmpty())
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return;
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HttpContext.Current.Session.Contents.Remove(key);
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}
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#endregion
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#region Cookie操作
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/// <summary>
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/// 写cookie值
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/// </summary>
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/// <param name="strName">名称</param>
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/// <param name="strValue">值</param>
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public static void WriteCookie(string strName, string strValue)
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{
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HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];
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if (cookie == null)
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{
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cookie = new HttpCookie(strName);
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}
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cookie.Value = strValue;
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HttpContext.Current.Response.AppendCookie(cookie);
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}
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/// <summary>
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/// 写cookie值
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/// </summary>
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/// <param name="strName">名称</param>
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/// <param name="strValue">值</param>
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/// <param name="strValue">过期时间(分钟)</param>
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public static void WriteCookie(string strName, string strValue, int expires)
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{
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HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];
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if (cookie == null)
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{
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cookie = new HttpCookie(strName);
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}
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cookie.Value = strValue;
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cookie.Expires = DateTime.Now.AddMinutes(expires);
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HttpContext.Current.Response.AppendCookie(cookie);
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}
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/// <summary>
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/// 读cookie值
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/// </summary>
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/// <param name="strName">名称</param>
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/// <returns>cookie值</returns>
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public static string GetCookie(string strName)
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{
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if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies[strName] != null)
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{
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return HttpContext.Current.Request.Cookies[strName].Value.ToString();
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}
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return "";
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}
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/// <summary>
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/// 删除Cookie对象
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/// </summary>
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/// <param name="CookiesName">Cookie对象名称</param>
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public static void RemoveCookie(string CookiesName)
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{
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HttpCookie objCookie = new HttpCookie(CookiesName.Trim());
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objCookie.Expires = DateTime.Now.AddYears(-5);
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HttpContext.Current.Response.Cookies.Add(objCookie);
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}
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#endregion
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#region GetFileControls(获取客户端文件控件集合)
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/// <summary>
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/// 获取有效客户端文件控件集合,文件控件必须上传了内容，为空将被忽略,
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/// 注意:Form标记必须加入属性 enctype="multipart/form-data",服务器端才能获取客户端file控件.
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/// </summary>
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public static List<HttpPostedFile> GetFileControls()
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{
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var result = new List<HttpPostedFile>();
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var files = HttpContext.Current.Request.Files;
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if (files.Count == 0)
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return result;
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for (int i = 0; i < files.Count; i++)
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{
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var file = files[i];
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if (file.ContentLength == 0)
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continue;
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result.Add(files[i]);
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}
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return result;
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}
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#endregion
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#region GetFileControl(获取第一个有效客户端文件控件)
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/// <summary>
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/// 获取第一个有效客户端文件控件,文件控件必须上传了内容，为空将被忽略,
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/// 注意:Form标记必须加入属性 enctype="multipart/form-data",服务器端才能获取客户端file控件.
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/// </summary>
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public static HttpPostedFile GetFileControl()
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{
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var files = GetFileControls();
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if (files == null || files.Count == 0)
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return null;
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return files[0];
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}
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#endregion
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#region HttpWebRequest(请求网络资源)
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/// <summary>
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/// 请求网络资源,返回响应的文本
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/// </summary>
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/// <param name="url">网络资源地址</param>
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public static string HttpWebRequest(string url)
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{
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return HttpWebRequest(url, string.Empty, Encoding.GetEncoding("utf-8"));
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}
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/// <summary>
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/// 请求网络资源,返回响应的文本
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/// </summary>
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/// <param name="url">网络资源Url地址</param>
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/// <param name="parameters">提交的参数,格式：参数1=参数值1&参数2=参数值2</param>
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public static string HttpWebRequest(string url, string parameters)
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{
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return HttpWebRequest(url, parameters, Encoding.GetEncoding("utf-8"), true);
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}
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/// <summary>
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/// 请求网络资源,返回响应的文本
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/// </summary>
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/// <param name="url">网络资源地址</param>
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/// <param name="parameters">提交的参数,格式：参数1=参数值1&参数2=参数值2</param>
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/// <param name="encoding">字符编码</param>
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/// <param name="isPost">是否Post提交</param>
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/// <param name="contentType">内容类型</param>
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/// <param name="cookie">Cookie容器</param>
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/// <param name="timeout">超时时间</param>
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public static string HttpWebRequest(string url, string parameters, Encoding encoding, bool isPost = false,
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string contentType = "application/x-www-form-urlencoded", CookieContainer cookie = null, int timeout = 120000)
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{
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var request = (HttpWebRequest)WebRequest.Create(url);
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request.Timeout = timeout;
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request.CookieContainer = cookie;
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if (isPost)
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{
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byte[] postData = encoding.GetBytes(parameters);
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request.Method = "POST";
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request.ContentType = contentType;
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request.ContentLength = postData.Length;
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using (Stream stream = request.GetRequestStream())
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{
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stream.Write(postData, 0, postData.Length);
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}
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}
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var response = (HttpWebResponse)request.GetResponse();
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string result;
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using (Stream stream = response.GetResponseStream())
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{
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if (stream == null)
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return string.Empty;
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using (var reader = new StreamReader(stream, encoding))
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{
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result = reader.ReadToEnd();
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}
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}
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return result;
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}
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#endregion
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#region 去除HTML标记
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/// <summary>
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/// 去除HTML标记
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/// </summary>
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/// <param name="NoHTML">包括HTML的源码 </param>
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/// <returns>已经去除后的文字</returns>
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public static string NoHtml(string Htmlstring)
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{
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//删除脚本
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Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
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//删除HTML
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Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"…", "", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"—", "", RegexOptions.IgnoreCase);
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Htmlstring = Regex.Replace(Htmlstring, @"“", "", RegexOptions.IgnoreCase);
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Htmlstring.Replace("<", "");
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Htmlstring = Regex.Replace(Htmlstring, @"”", "", RegexOptions.IgnoreCase);
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Htmlstring.Replace(">", "");
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Htmlstring.Replace("\r\n", "");
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Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();
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return Htmlstring;
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}
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#endregion
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#region 格式化文本（防止SQL注入）
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/// <summary>
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/// 格式化文本（防止SQL注入）
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static string Formatstr(string html)
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{
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System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" on[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex10 = new System.Text.RegularExpressions.Regex(@"select", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex11 = new System.Text.RegularExpressions.Regex(@"update", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex12 = new System.Text.RegularExpressions.Regex(@"delete", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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html = regex1.Replace(html, ""); //过滤<script></script>标记
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html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性
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html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件
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html = regex4.Replace(html, ""); //过滤iframe
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html = regex10.Replace(html, "s_elect");
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html = regex11.Replace(html, "u_pudate");
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html = regex12.Replace(html, "d_elete");
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html = html.Replace("'", "’");
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html = html.Replace(" ", " ");
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return html;
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}
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#endregion
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}
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}
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