using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.IO;
using System.Text;
using System.Xml.Serialization;
using System.IO.Compression;

[WebService(Namespace = "http://www.maolaoda.com/CRAXFileTransfer")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class CRAXFileTransfer : System.Web.Services.WebService
{
  public CRAXFileTransfer()
  {
    //Uncomment the following line if using designed components 
    //InitializeComponent(); 
  }

  [WebMethod]
  public GetFileResponse GetFile(string filename, bool compress)
  {
    GetFileResponse response = new GetFileResponse();
    try
    {
      response.FileName = filename;

      if (compress)
      {
        FileStream readStream = File.Open(Server.MapPath(filename), FileMode.Open, FileAccess.Read);
        byte[] buffer = new byte[readStream.Length];
        int count = readStream.Read(buffer, 0, buffer.Length);
        readStream.Close();
        if (count != buffer.Length)
        {
          response.Message = "Unable to read data from " + filename;
        }
        else
        {
          MemoryStream outputStream = new MemoryStream();
          GZipStream compressStream = new GZipStream(outputStream, CompressionMode.Compress, true);
          compressStream.Write(buffer, 0, buffer.Length);
          compressStream.Flush();
          compressStream.Close();
          response.FileContents = outputStream.GetBuffer();
        }
      }
      else
      {
        response.FileContents = File.ReadAllBytes(Server.MapPath(filename));
      } 

      response.Message = "OK";
    }
    catch (Exception ex)
    {
      response.Message = "ERROR:" + ex.Message;
    }         
    return response;
  }

  [XmlRoot("getFileResponse", Namespace = "http://www.maolaoda.com/CRAXFileTransfer")]
  public class GetFileResponse
  {
    [XmlElement("fileName", IsNullable = false)]
    public string FileName;

    [XmlElement("message", IsNullable = false)]
    public string Message;

    [XmlElement("fileData", IsNullable = true)]
    public byte[] FileContents;
  }

}