如何在ASP.NET中获取根域URI？

Question

假设我在http://www.foobar.com上托管了一个网站.

有没有办法可以在我的代码中以编程方式确定" http://www.foobar.com/ "(即无需在我的Web配置中对其进行硬编码)？

Answer 1

string baseUrl = Request.Url.GetLeftPart(UriPartial.Authority);

Uri :: GetLeftPart方法:

GetLeftPart方法返回一个字符串,其中包含URI字符串的最左边部分,以part指定的部分结束.

UriPartial枚举:

URI的方案和权限段.

Answer 2

对于仍然想知道的人,可以在http://devio.wordpress.com/2009/10/19/get-absolut-url-of-asp-net-application/上找到更完整的答案.

public string FullyQualifiedApplicationPath
{
    get
    {
        //Return variable declaration
        var appPath = string.Empty;

        //Getting the current context of HTTP request
        var context = HttpContext.Current;

        //Checking the current context content
        if (context != null)
        {
            //Formatting the fully qualified website url/name
            appPath = string.Format("{0}://{1}{2}{3}",
                                    context.Request.Url.Scheme,
                                    context.Request.Url.Host,
                                    context.Request.Url.Port == 80
                                        ? string.Empty
                                        : ":" + context.Request.Url.Port,
                                    context.Request.ApplicationPath);
        }

        if (!appPath.EndsWith("/"))
            appPath += "/";

        return appPath;
    }
}

Answer 3

HttpContext.Current.Request.Url可以获取有关URL的所有信息.并且可以将url分解成碎片.

Answer 4

string hostUrl = Request.Url.Scheme + "://" + Request.Url.Host; //should be "http://hostnamehere.com"

Answer 5

如果示例Url是http://www.foobar.com/Page1

HttpContext.Current.Request.Url; //returns "http://www.foobar.com/Page1"


HttpContext.Current.Request.Url.Host; //returns "www.foobar.com"


HttpContext.Current.Request.Url.Scheme; //returns "http/https"


HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority); //returns "http://www.foobar.com"

Answer 6

要获取整个请求URL字符串:

HttpContext.Current.Request.Url

要获得请求的www.foo.com部分:

HttpContext.Current.Request.Url.Host

请注意,您在某种程度上受ASP.NET应用程序之外的因素的影响.如果IIS配置为接受应用程序的多个或任何主机标头,那么通过DNS解析到您的应用程序的任何域可能会显示为请求URL,具体取决于用户输入的那个.

Answer 7

Match match = Regex.Match(host, "([^.]+\\.[^.]{1,3}(\\.[^.]{1,3})?)$");
string domain = match.Groups[1].Success ? match.Groups[1].Value : null;

host.com => 返回host.com
s.host.com => 返回host.com

host.co.uk => 返回 host.co.uk
www.host.co.uk => 返回 host.co.uk
s1.www.host.co.uk => 返回 host.co.uk