asp.net – 在集成模式下替换HttpContext.Current.Request.ServerVariable

在集成模式下使用HttpContext.Current.Request.ServerVariables [“SERVER_NAME”]会在IIS7中出现错误,如下所示： http://mvolo.com/blogs/serverside/archive/2007/11/10/Integrated-mode-Request-is-not-available-in-this-context-in-Application_5F00_Start.aspx

我可以在global.asax代码中使用HttpContext.Current.Request.ServerVariables [“SERVER_NAME”]吗？

这与使用类似

String strPath = 
HttpContext.Current.Server.MapPath(HttpRuntime.AppDomainAppVirtualPath);

代替

//String strPath = 
HttpContext.Current.Server.MapPath(HttpContext.Current.Request.ServerVariables["PATH_INFO"]);

解决方法

这是我在经典模式下使用的内容.开销可以忽略不计.

/// <summary>
/// Class is called only on the first request
/// </summary>
private class AppStart
{
    static bool _init = false;
    private static Object _lock = new Object();

    /// <summary>
    /// Does nothing after first request
    /// </summary>
    /// <param name="context"></param>
    public static void Start(HttpContext context)
    {
        if (_init)
        {
            return;
        }
        //create class level lock in case multiple sessions start simultaneously
        lock (_lock)
        {
            if (!_init)
            {
                string server = context.Request.ServerVariables["SERVER_NAME"];
                string port = context.Request.ServerVariables["SERVER_PORT"];
                HttpRuntime.Cache.Insert("basePath","http://" + server + ":" + port + "/");
            }
        }
    }
}

protected void Session_Start(object sender,EventArgs e)
{
    //initializes Cache on first request
    AppStart.Start(HttpContext.Current);
}

（编辑：安卓应用网）

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