/// <summary>
/// 读取位置
/// </summary>
/// <param name="offset">偏移量</param>
/// <returns></returns>
private IPLocation ReadIPLocation(long offset)
{
IPLocation ipLocation = new IPLocation();
_ipdatefile.Position = offset + 4;
byte flag = (byte)_ipdatefile.ReadByte();
if (flag == MODE1)
{
long countryOffset = ReadByte3();
_ipdatefile.Position = countryOffset;
flag = (byte)_ipdatefile.ReadByte();
if (flag == MODE2)
{
ipLocation.Country = ReadString(ReadByte3());
_ipdatefile.Position = countryOffset + 4;
}
else
{
ipLocation.Country = ReadString(countryOffset);
}
ipLocation.Area = ReadArea(_ipdatefile.Position);
}
else if (flag == MODE2)
{
ipLocation.Country = ReadString(ReadByte3());
ipLocation.Area = ReadArea(offset + 8);
}
else
{
ipLocation.Country = ReadString(--_ipdatefile.Position);
ipLocation.Area = ReadString(_ipdatefile.Position);
}
return(ipLocation);
}
/// <summary>
/// 根据ip地址确定所在区域
/// </summary>
/// <param name="ip">ip地址</param>
/// <returns></returns>
public RegionInfo Seek(string ip)
{
IPLocation ipLocation = SearchLocation(ip);
if (ipLocation == null || ipLocation.Country.Length == 0)
{
return(null);
}
string country = ipLocation.Country;
int startIndex = country.IndexOf("省");
int endIndex = country.IndexOf("市");
if (startIndex > 0 && endIndex > 0 && endIndex > startIndex)
{
RegionInfo regionInfo = Regions.GetRegionByNameAndLayer(country.Substring(startIndex + 1, endIndex - startIndex), 2);
if (regionInfo != null)
{
return(regionInfo);
}
}
if (country.StartsWith("北京"))
{
return(Regions.GetRegionById(35));
}
else if (country.StartsWith("天津"))
{
return(Regions.GetRegionById(36));
}
else if (country.StartsWith("上海"))
{
return(Regions.GetRegionById(107));
}
else if (country.StartsWith("重庆"))
{
return(Regions.GetRegionById(269));
}
else if (country.StartsWith("四川省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(23));
}
else if (country.StartsWith("四川省阿坝州"))
{
return(Regions.GetRegionById(288));
}
else if (country.StartsWith("四川省甘孜州"))
{
return(Regions.GetRegionById(289));
}
else if (country.StartsWith("四川省凉山州"))
{
return(Regions.GetRegionById(290));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("湖南省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(18));
}
else if (country.StartsWith("湖南省湘西州"))
{
return(Regions.GetRegionById(230));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("湖北省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(17));
}
else if (country.StartsWith("湖北省神农架林区"))
{
return(Regions.GetRegionById(1997));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("广西"))
{
if (country.Length == 2)
{
return(Regions.GetRegionById(20));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(2, country.IndexOf('市') - 2), 2));
}
}
else if (country.StartsWith("云南省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(25));
}
else if (country.StartsWith("云南省楚雄州"))
{
return(Regions.GetRegionById(308));
}
else if (country.StartsWith("云南省红河州"))
{
return(Regions.GetRegionById(309));
}
else if (country.StartsWith("云南省文山州"))
{
return(Regions.GetRegionById(310));
}
else if (country.StartsWith("云南省西双版纳州"))
{
return(Regions.GetRegionById(311));
}
else if (country.StartsWith("云南省大理州"))
{
return(Regions.GetRegionById(312));
}
else if (country.StartsWith("云南省德宏州"))
{
return(Regions.GetRegionById(313));
}
else if (country.StartsWith("云南省怒江州"))
{
return(Regions.GetRegionById(314));
}
else if (country.StartsWith("云南省迪庆州"))
{
return(Regions.GetRegionById(315));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("黑龙江省"))
{
if (country.Length == 4)
{
return(Regions.GetRegionById(8));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(4, country.IndexOf('市') - 4), 2));
}
else if (country.Contains("地区"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(4, country.IndexOf("地区") - 3), 2));
}
}
else if (country.StartsWith("吉林省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(7));
}
else if (country.StartsWith("吉林省延边州"))
{
return(Regions.GetRegionById(93));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("内蒙古"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(5));
}
else if (country.Contains("盟"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('盟') - 3), 2));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("贵州省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(24));
}
else if (country.StartsWith("贵州省黔西南"))
{
return(Regions.GetRegionById(296));
}
else if (country.StartsWith("贵州省黔东南"))
{
return(Regions.GetRegionById(298));
}
else if (country.StartsWith("贵州省黔南州"))
{
return(Regions.GetRegionById(299));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("甘肃省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(28));
}
else if (country.StartsWith("甘肃省临夏州"))
{
return(Regions.GetRegionById(345));
}
else if (country.StartsWith("甘肃省甘南"))
{
return(Regions.GetRegionById(346));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("新疆"))
{
if (country.Length == 2)
{
return(Regions.GetRegionById(31));
}
else if (country.StartsWith("新疆阿勒泰"))
{
return(Regions.GetRegionById(373));
}
else if (country.StartsWith("新疆昌吉州"))
{
return(Regions.GetRegionById(364));
}
else if (country.StartsWith("新疆博尔塔拉州"))
{
return(Regions.GetRegionById(365));
}
else if (country.StartsWith("新疆巴音郭楞州"))
{
return(Regions.GetRegionById(366));
}
else if (country.StartsWith("新疆克孜勒苏柯尔州"))
{
return(Regions.GetRegionById(368));
}
else if (country.StartsWith("新疆伊犁州"))
{
return(Regions.GetRegionById(371));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(2, country.IndexOf('市') - 2), 2));
}
else if (country.Contains("地区"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(2, country.IndexOf("地区") - 1), 2));
}
}
else if (country.StartsWith("青海省"))
{
if (country.Length == 3)
{
return(Regions.GetRegionById(29));
}
else if (country.StartsWith("青海省海北州"))
{
return(Regions.GetRegionById(349));
}
else if (country.StartsWith("青海省黄南州"))
{
return(Regions.GetRegionById(350));
}
else if (country.StartsWith("青海省海南州"))
{
return(Regions.GetRegionById(351));
}
else if (country.StartsWith("青海省果洛州"))
{
return(Regions.GetRegionById(352));
}
else if (country.StartsWith("青海省玉树州"))
{
return(Regions.GetRegionById(353));
}
else if (country.StartsWith("青海省海西州"))
{
return(Regions.GetRegionById(354));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(3, country.IndexOf('市') - 3), 2));
}
}
else if (country.StartsWith("西藏"))
{
if (country.Length == 2)
{
return(Regions.GetRegionById(26));
}
else if (country.Contains("市"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(2, country.IndexOf('市') - 2), 2));
}
else if (country.Contains("地区"))
{
return(Regions.GetRegionByNameAndLayer(country.Substring(2, country.IndexOf("地区") - 1), 2));
}
}
else if (country.StartsWith("香港"))
{
return(Regions.GetRegionById(3241));
}
else if (country.StartsWith("澳门"))
{
return(Regions.GetRegionById(3242));
}
else if (country.StartsWith("台湾"))
{
return(Regions.GetRegionById(3240));
}
return(null);
}