using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Web;

namespace BLWWS_BLL
{
    /// <summary>
    /// 日志辅助类
    /// </summary>
    public static class LogHelper
    {
        public static string ExePath = HttpContext.Current.Request.PhysicalApplicationPath;
        /// <summary>
        /// 日志写入到批定的文件路径下
        /// </summary>
        /// <param name="msg"></param>
        public static void WriteLog(string msg, string path = "")
        {
            if (string.IsNullOrEmpty(path))
            {
                path = ExePath;
            }
            path = path + "\\logs\\" + DateTime.Now.ToString("yyyyMMdd") + ".log";
            msg = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + ":\t" +
                HttpContext.Current.Request.UserHostAddress + ":" + msg + Environment.NewLine;
            WriteLog(path, msg, true);
        }
        public static void WriteLogNew(string msg, string path = "")
        {
            if (string.IsNullOrEmpty(path))
            {
                path = ExePath;
            }
            path = path + "\\logs\\" + DateTime.Now.ToString("yyyyMMdd") + ".log";
            msg = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + ":\t" + msg + Environment.NewLine;
            WriteLog(path, msg, true);
        }
        /// <summary>
        /// 把数据写入指定的文件里
        /// </summary>
        /// <param name="path">文件路径（包括文件名称）</param>
        /// <param name="msg">写入内容</param>
        /// <param name="append">是否追加</param>
        public static void WriteLog(string path, string msg, bool append)
        {
            string folder = Path.GetDirectoryName(path);
            if (!Directory.Exists(folder))
            {
                Directory.CreateDirectory(folder);
            }
            StreamWriter sw = null;
            try
            {
                sw = new StreamWriter(path, append, Encoding.Unicode);
                sw.WriteLine(msg);
            }
            catch (Exception)
            {
            }
            finally
            {
                if (sw != null)
                {
                    sw.Close();
                }
            }
        }
        /// <summary>
        /// 把数据写入指定的文件里
        /// </summary>
        /// <param name="path"></param>
        /// <param name="msg"></param>
        public static void WriteLog(string path, byte[] msg)
        {
            string folder = Path.GetDirectoryName(path);
            if (!Directory.Exists(folder))
            {
                Directory.CreateDirectory(folder);
            }
            FileStream fs = null;
            try
            {
                fs = new FileStream(path, FileMode.Append, FileAccess.Write);
                fs.Write(msg, 0, msg.Length);
            }
            catch (Exception)
            {
            }
            finally
            {
                if (fs != null)
                {
                    fs.Close();
                }
            }
        }
        /// <summary>
        /// 读取文件内容
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static string ReadLog(string path)
        {
            if (File.Exists(path))
            {
                StreamReader sr = null;
                try
                {
                    sr = new StreamReader(path);
                    return sr.ReadToEnd();
                }
                catch (Exception)
                {
                }
                finally
                {
                    if (sr != null)
                    {
                        sr.Close();
                    }
                }

            }
            return "";
        }
    }
}