#region

using System.IO;

#endregion

namespace CSFrameworkV5.Common
{
    /// <summary>
    ///     取真实的文件类型(文件扩展名）
    /// </summary>
    public class TrueFileFormat
    {
        /// <summary>
        ///     取真实的文件类型
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static FileExtension GetExtension(string path)
        {
            if (!File.Exists(CodeSafeHelper.GetSafePath(path)))
                return FileExtension.UNKNOW;

            var fs = new FileStream(CodeSafeHelper.GetSafePath(path),
                FileMode.Open, FileAccess.Read);
            var r = new BinaryReader(fs);
            var bx = "";
            byte buffer;
            try
            {
                buffer = r.ReadByte();
                bx = buffer.ToStringEx();
                buffer = r.ReadByte();
                bx += buffer.ToStringEx();
                r.Close();
                fs.Close();
                return (FileExtension)int.Parse(bx); //真实的文件类型
            }
            catch
            {
                return FileExtension.UNKNOW;
            }
        }
    }

    /// <summary>
    ///     文件扩展名编号
    /// </summary>
    public enum FileExtension
    {
        UNKNOW = 0, //未知类型
        JPG = 255216,
        GIF = 7173,
        BMP = 6677,
        PNG = 13780,
        COM = 7790,
        EXE = 7790,
        DLL = 7790,
        RAR = 8297,
        ZIP = 8075,
        XML = 6063,
        HTML = 6033,
        ASPX = 239187,
        CS = 117115,
        JS = 119105,
        TXT = 210187,
        SQL = 255254,
        BAT = 64101,
        BTSEED = 10056,
        RDP = 255254,
        PSD = 5666,
        PDF = 3780,
        CHM = 7384,
        LOG = 70105,
        REG = 8269,
        HLP = 6395,
        DOC = 208207,
        XLS = 208207,
        DOCX = 208207,
        XLSX = 208207
    }
}