MaxMind/GeoIP 调用位置时出错 class

Question

我成功使用 MaxMind GeoIP Legacy .NET API (https://github.com/maxmind/geoip-api-csharp2) 国家 Class 检索基于 IP 的国家代码。但是，我运行遇到了尝试使用位置 class 的问题。下面是我的代码：

try
{
    // capture visitors IP
    string visitorIp = Model.ServerVariables["HTTP_X_Forwarded_For"];
    visitorIp = String.IsNullOrWhiteSpace(visitorIp) ? Request.UserHostAddress : visitorIp;


    string geoIpPath = HttpContext.Current.Server.MapPath("~/App_Data/GeoIP.dat");
    LookupService ls = new LookupService(geoIpPath, LookupService.GEOIP_MEMORY_CACHE);
    //get country of the ip address
    Country c = ls.getCountry(visitorIp);
    string countryCode = c.getCode() != "--" ? c.getCode() : "US";


    // Capture country code as cookie
    if (Request.Cookies["GeoIP"] == null)
    {
        HttpCookie cookie = new HttpCookie("GeoIP", countryCode);
        cookie.Expires = DateTime.Now.AddDays(30);
        Response.Cookies.Add(cookie);
    }

    string geoIpCityPath = HttpContext.Current.Server.MapPath("~/App_Data/GeoLiteCity.dat");
    LookupService lsCity = new LookupService(geoIpCityPath, LookupService.GEOIP_MEMORY_CACHE);
    Location l = ls.getLocation(visitorIp);
    <h1>Postal Code = @l.postalCode.ToString()</h1>


}
catch (Exception e)
{
    <p>@e</p>
}

字符串 countryCode 跟踪无误。当我尝试使用位置 class 时，我收到以下错误消息：

System.ArgumentOutOfRangeException: Non-negative number required. Parameter name: length at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length, Boolean reliable) at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length) at LookupService.getLocation(Int64 ipnum) in ~\Models\LookupService.cs:line 582 at LookupService.getLocation(IPAddress addr) in ~\Models\LookupService.cs:line 443 at ASP._Page_Views_Shared__GeoIP_cshtml.Execute() in ~\Views\Shared_GeoIP.cshtml:line 34

想法？提前致谢！

Answer 1

我建议针对 GeoIP Legacy API 提交错误。听起来好像读取数据库有问题。您也可以尝试 NuGet 的版本，它是 GitHub.

上版本的一个分支

至于 GeoIP2，您可以使用 NuGet 获得预编译的 2.4.0 包：

Install-Package MaxMind.GeoIP2 -Version 2.4.0

MaxMind/GeoIP 调用位置时出错 class

MaxMind/GeoIP Error calling Location class

c#

asp.net

.net

geoip

maxmind