?using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Security.Cryptography;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Data;
using System.Data.SqlClient;
using System.Web.Security;
using System.Xml;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
    private string rootdir = ConfigurationManager.AppSettings["UploadDisk"].ToString();

    private string UploadPath;

    public Service () {
    }

    #region Validate

    /// <summary>
    /// 驗證用戶的合法性
    /// </summary>
    /// <param name="username">用戶名</param>
    /// <param name="password">密碼</param>
    /// <returns>合法與否</returns>
    private bool ValidUser(string username, string password)
    {
        SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"]);
        conn.Open();
        SqlCommand cmd = new SqlCommand("select id,name from users where name=@_name and pass=@_pass", conn);
        cmd.Parameters.Add("@_name", SqlDbType.VarChar);
        cmd.Parameters.Add("@_pass", SqlDbType.VarChar);
        cmd.Parameters[0].Value = username;
        cmd.Parameters[1].Value = password;
        SqlDataReader dr = cmd.ExecuteReader();
        cmd.Dispose();
        if (dr.Read())
        {
            dr.Close();
            conn.Close();
            return true;
        }
        else
        {
            dr.Close();
            conn.Close();
            return false;
        }
    }

    [WebMethod(Description = "保證網絡暢通")]
    public void Ping()
    {
 
    }

    /// <summary>
    /// 獲取票據
    /// </summary>
    /// <param name="UserName">用戶名</param>
    /// <param name="PassWord">密碼</param>
    /// <returns>驗證合法后返回加密票據，否則返回空</returns>
    [WebMethod(Description="獲取票據")]
    public string GetAuthorizationTicket(string UserName, string PassWord)
    {
        if (ValidUser(UserName, PassWord))
        {
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(UserName, false, 1);

            string encryptedTicket = FormsAuthentication.Encrypt(ticket);

            int timeout = 20;

            Context.Cache.Insert(encryptedTicket, UserName, null, DateTime.Now.AddMinutes(timeout), TimeSpan.Zero);

            return encryptedTicket;
        }
        else
        {
            return "失敗";
        }

    }

    /// <summary>
    /// 驗證加密票據是否有效
    /// </summary>
    /// <param name="ticket">加密票據</param>
    /// <returns>有效與否</returns>
    private bool IsTicketValid(string ticket,bool IsAdminCall)
    {
        ///查看加密票據是否為空，或者緩存中沒有加密票
        if (ticket == null || Context.Cache[ticket] == null)
        {
            ///用戶沒有通過驗證，返回假
            return false;
        }
        else
        {
            ///解密加密票，獲取用戶名
            string username = FormsAuthentication.Decrypt(ticket).Name;

            if (username == null || username == "")
            {
                ///用戶名為空返回假
                return false;
            }
            else
            {
                if (IsAdminCall && !IsAdministrator(username))
                    return false;

                return true;
            }  
        }
    }

    private bool IsAdministrator(string name)
    {
            bool Results = false;
            SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"]);
            SqlCommand cmd = new SqlCommand("select IsAdmin from users where name = @name", conn);

            cmd.Parameters.Add("@name", SqlDbType.VarChar);
            cmd.Parameters[0].Value = name;
            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            if (dr.Read())
            {
                Results = (bool)dr["IsAdmin"];
            }
            cmd.Dispose();
            conn.Dispose();
            return Results;
    }

    #endregion

    #region FileList

    /// <summary>
    /// 取得文件和文件夾列表
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="path">客戶端路徑</param>
    /// <returns>成功返回文件和文件夾列表，否則返回空</returns>
    [WebMethod(Description = "取得目錄 需要提供合法票據")]
    public string GetFile(string ticket,string path)
    {
        ///查看加密票是否有效
        if (IsTicketValid(ticket,false))
        {
            ///驗證當前用戶目錄是否存在
            if (!Directory.Exists(rootdir + FormsAuthentication.Decrypt(ticket).Name))
            {
                ///如果不存在
                ///新建用戶目錄
                Directory.CreateDirectory(rootdir + FormsAuthentication.Decrypt(ticket).Name);
                ///初始化系統目錄
                Directory.CreateDirectory(rootdir + FormsAuthentication.Decrypt(ticket).Name + "\\個人助理");
                Directory.CreateDirectory(rootdir + FormsAuthentication.Decrypt(ticket).Name + "\\我的文檔");
                Directory.CreateDirectory(rootdir + FormsAuthentication.Decrypt(ticket).Name + "\\我的圖片");
                Directory.CreateDirectory(rootdir + FormsAuthentication.Decrypt(ticket).Name + "\\我的多媒體");
                ///返回當前用戶目錄
                string Results = ListShow(rootdir + FormsAuthentication.Decrypt(ticket).Name);
                return Results;
            }
            else
            {
                string Path = rootdir + FormsAuthentication.Decrypt(ticket).Name + path;
                ///獲取指定文件夾列表并返回
                FileInfo file = new FileInfo(Path);
                ///判斷當前是否是文件夾
                if ((file.Attributes & FileAttributes.Directory) != 0)
                {
                    string Results = ListShow(Path);
                    return Results;
                }
                else
                    return null;
            }
        }
        else return null;
    }

    /// <summary>
    /// 文件夾結構
    /// </summary>
    /// <param name="dir">需要列出結構的目錄</param>
    /// <returns>文件夾結構</returns>
    private string ListShow(string dir)
    {
        DirectoryInfo di = new DirectoryInfo(dir);
        DirectoryInfo[] diArr = di.GetDirectories();
        string Results = "";
        foreach (DirectoryInfo dri in diArr)
        {
            ///如果是文件夾則頭上加@
            Results = Results + "@" + dri.Name + "|";
        }
        FileInfo[] SubFiles = di.GetFiles();
        foreach (FileInfo fileNext in SubFiles)
        {
            Results = Results + fileNext.ToString() + "|";
        }
        return Results;
    }

    /// <summary>
    /// 新建文件夾
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="path">路徑</param>
    /// <returns>成功返回“success” ,失敗返回空</returns>
    [WebMethod(Description = "新建目錄 需要提供合法票據")]
    public string CreateFolder(string ticket, string path)
    {
        if (IsTicketValid(ticket,false))
        {
            try
            {
                if (!Directory.Exists(rootdir + FormsAuthentication.Decrypt(ticket).Name + path))
                {
                    Directory.CreateDirectory(rootdir + FormsAuthentication.Decrypt(ticket).Name + path);
                    return null;
                }
                else
                    return "目錄已經存在";

            }
            catch (Exception ex)
            {
                CustomSoapException("目錄創建失敗", "目錄創建失敗");
                return ex.ToString();
            }
        }
        else
            return "驗證失敗";
    }

    /// <summary>
    /// 重命名
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="OldName">原文件名</param>
    /// <param name="NewName">新文件名</param>
    /// <returns>成功返回“success” ,失敗返回空</returns>
    [WebMethod(Description = "重命名 需要提供合法票據")]
    public string ReName(string ticket, string OldName, string NewName)
    {
        if (IsTicketValid(ticket,false))
        {
            string OlePath = rootdir + FormsAuthentication.Decrypt(ticket).Name + OldName;
            string NewPath = rootdir + FormsAuthentication.Decrypt(ticket).Name + NewName;
            try
            {
                Directory.Move(OlePath, NewPath);
                return "success";
            }
            catch
            {
                CustomSoapException("目錄創建失敗", "目錄創建失敗");
                return null;
            }
        }
        else
            return null;
    }

    /// <summary>
    /// 文件文件夾刪除
    /// </summary>
    /// <param name="ticket">加密票</param>
    /// <param name="Name">路徑</param>
    [WebMethod(Description = "刪除 需要提供合法票據")]
    public string ReMove(string ticket, string Name)
    {
        if (IsTicketValid(ticket,false))
        {
            string Path = rootdir + FormsAuthentication.Decrypt(ticket).Name + Name;
            try
            {
                FileInfo file = new FileInfo(Path);
                ///判斷當前是否是文件夾
                if ((file.Attributes & FileAttributes.Directory) != 0)
                    Directory.Delete(Path, true);
                else
                    File.Delete(Path);
                return null;
            }
            catch
            {
                return "刪除失敗";
            }
        }
        else
            return "驗證失敗";
    }

    /// <summary>
    /// 屬性
    /// </summary>