/// <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();
}
/// <summary>
/// 生成缓存并保存
/// </summary>
/// <param name="context"></param>
/// <param name="key"></param>
/// <param name="info"></param>
private void GenHtmlAndSave(RequestInfo info)
{
if (!GlobalGenHtmlState.Contains(info.Key))
{
try
{
GlobalGenHtmlState.Add(info.Key);
var html = GenHTML.GenHTML(info);
if (html != null)
{
Store.Save(info.Key, html);
}
else
{
LogHelp.Warn("getHtml is null " + info.Path);
}
}
catch (Exception e)
{
throw e;
}
finally
{
GlobalGenHtmlState.Remove(info.Key);
}
}
}
public SqlExpire()
{
if (System.Configuration.ConfigurationManager.ConnectionStrings["SqlExpireConn"] != null)
{
ConnStr = System.Configuration.ConfigurationManager.ConnectionStrings["SqlExpireConn"].ConnectionString;
}
else
{
LogHelp.Warn("SqlExpire config error: 没有数据库连接，staticHtml 会使用数据库连接：System.Configuration.ConfigurationManager.ConnectionStrings[\"SqlExpireConn\"]");
}
}
/// <summary>
/// 供线程线程调用方法
/// </summary>
/// <param name="arg"></param>
private void ThreadStart(Object arg)
{
var req = arg as RequestInfo;
try
{
GenHtmlAndSave(req);
}
catch (Exception e)
{
LogHelp.Warn("getHtml error " + e);
}
}
void context_BeginRequest(object sender, EventArgs e)
{
var httpApplication = sender as HttpApplication;
try
{
if (!core.IsSkip(httpApplication.Context.Request))
{
core.Process(httpApplication.Context);
}
}
catch (Exception ex)
{
LogHelp.Warn("request process error " + httpApplication.Request.RawUrl + " " + ex.ToString());
}
}
public void Init(HttpApplication context)
{
try
{
if (htmlSection.Run == "on")
{
core = HtmlStaticCore.GetInstance(htmlSection);
context.BeginRequest += new EventHandler(context_BeginRequest);
LogHelp.Info("int success! ");
}
else
{
LogHelp.Warn("run off! 请在staticHtml节点中添加属性run=\"on\" on:启用 off:关闭");
}
}
catch (Exception e)
{
LogHelp.Error("ini error! " + e.ToString());
}
}
/// <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);
}
