Пример #1
0
 /// <summary>
 /// 根据key查询缓存信息
 /// </summary>
 /// <param name="key">HttpRequest唯一key</param>
 /// <returns>Html</returns>
 public CacheInfo Query(string key)
 {
     GetRealPath();
     FileInfo fileinfo = new FileInfo(GetPath(key));
     if (fileinfo.Exists)
     {
         var info = new CacheInfo();
         info.StoreTime = fileinfo.LastWriteTime;
         info.Size = fileinfo.Length;
         return info;
     }
     return null;
 }
Пример #2
0
 public void Save(string key, Stream repInfo)
 {
     Cache[key] = repInfo;
     CacheInfo info = null;
     if (infos.ContainsKey(key))
     {
         info = infos[key];
     }
     else
     {
         info = new CacheInfo();
     }
     info.Size = repInfo.Length;
     info.StoreTime = DateTime.Now;
     infos[key] = info;
 }
Пример #3
0
 /// <summary>
 /// 根据请求信息,生成实际的sql语句
 /// </summary>
 /// <param name="req"></param>
 /// <returns></returns>
 private String buildSql(System.Web.HttpRequest req, CacheInfo info)
 {
     String sql = Sql;
     foreach (var item in Values)
     {
         var value = req.QueryString[item];
         if (!String.IsNullOrEmpty(value))
         {
             sql = sql.Replace("GET[" + item + "]", value);
         }
         else
         {
             LogHelp.Warn("SqlExpire error:" + "配置了Get变量" + item + ",在Request.QueryString中确找不到");
         }
     }
     sql = sql.Replace("[STORETIME]", info.StoreTime.AddSeconds(3).ToString("yyyy-MM-dd HH:mm:ss"));
     sql = sql.Replace("[LENGTH]", info.Size.ToString());
     sql = sql.Replace("[KEY]", info.Key);
     return sql;
 }
Пример #4
0
 public bool IsExpire(HttpRequest req, CacheInfo info)
 {
     return info == null || (DateTime.Now - info.StoreTime).TotalSeconds > _second;
 }
Пример #5
0
 public bool IsExpire(System.Web.HttpRequest req, CacheInfo info)
 {
     return info == null || (DateTime.Now - info.StoreTime).TotalSeconds > _second || innerSqlExpire(req, info);
 }
Пример #6
0
 /// <summary>
 /// 根据请求及配置的sql语句,查询数据库是否有记录,如果有记录代表已过期,反之亦然
 /// </summary>
 /// <param name="req"></param>
 /// <param name="info"></param>
 /// <returns></returns>
 private bool innerSqlExpire(System.Web.HttpRequest req, CacheInfo info)
 {
     var sql = buildSql(req, info);
     var isExipre = false;
     if (!String.IsNullOrEmpty(ConnStr))
     {
         using (var conn = GetConn())
         {
             var comm = conn.CreateCommand();
             comm.CommandText = sql;
             isExipre = comm.ExecuteReader().HasRows;
         }
     }
     return isExipre;
 }
Пример #7
0
 public bool IsExpire(HttpRequest req, CacheInfo info)
 {
     return(info == null || (DateTime.Now - info.StoreTime).TotalSeconds > _second);
 }
Пример #8
0
 public bool IsExpire(System.Web.HttpRequest req, CacheInfo info)
 {
     return(info == null || (DateTime.Now - info.StoreTime).TotalSeconds > _second || innerSqlExpire(req, info));
 }
Пример #9
0
 /// <summary>
 /// 缓存没过期,直接输出缓存
 /// </summary>
 /// <param name="context"></param>
 /// <param name="key"></param>
 /// <param name="info"></param>
 private void ResponceCache(HttpContext context, string key, CacheInfo info)
 {
     var req = context.Request;
     var rep = context.Response;
     string time = info.StoreTime.ToString("r");
     if (req.Headers["If-Modified-Since"] == time)
     {
         rep.StatusCode = (int)System.Net.HttpStatusCode.NotModified;
         LogHelp.Info("cache hit 304 " + req.RawUrl);
     }
     else
     {
         var httpInfo = new HttpInfo();
         var _stream = Store.Get(key);
         int headEndPosition = 0;
         string firstLine = "";
         httpInfo.Headers = HttpParseHelp.ParseHeader(_stream, ref headEndPosition, ref firstLine);
         rep.StatusCode = ParseRespondCode(firstLine);
         if (rep.StatusCode == 200)
         {
             rep.AppendHeader("Last-Modified", time);
         }
         httpInfo.Content = _stream;
         OutResponse(req, rep, httpInfo);
         LogHelp.Info("cache hit html " + req.RawUrl);
     }
     context.ApplicationInstance.CompleteRequest();
 }