/mojoPortal.Features.UI/SharedFiles/Download.aspx.cs

/// Author:					    Joe Audette

/// Created:				    2007-01-28

/// Last Modified:			    2011-08-20

/// 

/// The use and distribution terms for this software are covered by the 

/// Common Public License 1.0 (http://opensource.org/licenses/cpl.php)  

/// which can be found in the file CPL.TXT at the root of this distribution.

/// By using this software in any fashion, you are agreeing to be bound by 

/// the terms of this license.

///

/// You must not remove this notice, or any other, from this software.



using System;

using System.IO;

using System.Globalization;

using System.Text;

using System.Web;

using mojoPortal.Business;

using mojoPortal.Business.WebHelpers;

using mojoPortal.FileSystem;

using mojoPortal.Web.Framework;

using log4net;





namespace mojoPortal.Web.SharedFilesUI

{



    public partial class SharedFilesDownload : NonCmsBasePage

    {

        private static readonly ILog log = LogManager.GetLogger(typeof(SharedFilesDownload));



        #region OnInit

        override protected void OnInit(EventArgs e)

        {

            this.Load += new EventHandler(this.Page_Load);

            

            base.OnInit(e);

        }

        #endregion



        private IFileSystem fileSystem = null;

        private int pageID = -1;

        private int moduleID = -1;

        private int fileID = -1;

        private SharedFile sharedFile = null;

        





        protected void Page_Load(object sender, EventArgs e)

        {

            SecurityHelper.DisableDownloadCache();

            //Server.ScriptTimeout



            if (

                (LoadAndCheckParams())

                && (UserCanViewPage(moduleID, SharedFile.FeatureGuid))

                )

            {

                DownloadFile();

            }

            else

            {

                if (!Request.IsAuthenticated)

                {

                    SiteUtils.RedirectToLoginPage(this);

                    return;

                }

                else

                {

                    SiteUtils.RedirectToAccessDeniedPage(this);

                    return;

                }



            }



        }



        private void DownloadFile()

        {

            if (

                (CurrentPage != null)

                &&(sharedFile != null)

                )

            {

                string virtualPath =  "~/Data/Sites/" + this.CurrentPage.SiteId.ToInvariantString() + "/SharedFiles/"

                    + sharedFile.ServerFileName;



                if (fileSystem.FileExists(virtualPath))

                {

                    //FileInfo fileInfo = new System.IO.FileInfo(downloadPath);

                    WebFile fileInfo = fileSystem.RetrieveFile(virtualPath);

                    

                    Page.Response.AppendHeader("Content-Length", fileInfo.Size.ToString(CultureInfo.InvariantCulture));

                }

                else

                {

                    log.Error("Shared File Not Found. User tried to download file " + virtualPath);

                    return;

                }



                string fileType = Path.GetExtension(sharedFile.FriendlyName).Replace(".", string.Empty);



                string mimeType = SiteUtils.GetMimeType(fileType);

                //Page.Response.ContentType = mimeType;

                Page.Response.ContentType = "application/" + fileType;



                if ((!SharedFilesConfiguration.TreatPdfAsAttachment) && (SiteUtils.IsNonAttacmentFileType(fileType)))

                {

                    //this will display the pdf right in the browser

                    Page.Response.AddHeader("Content-Disposition", "filename=\"" + HttpUtility.UrlEncode(sharedFile.FriendlyName, Encoding.UTF8) + "\"");

                }

                else

                {

                    // other files just use file save dialog

                    Page.Response.AddHeader("Content-Disposition", "attachment; filename=\"" + HttpUtility.UrlEncode(sharedFile.FriendlyName, Encoding.UTF8) + "\"");

                }



                //Page.Response.AddHeader("Content-Length", documentFile.DocumentImage.LongLength.ToString());



                try

                {

                    Page.Response.Buffer = false;

                    Page.Response.BufferOutput = false;

                    if (Page.Response.IsClientConnected)

                    {

                        

                        //Page.Response.TransmitFile(downloadPath);

                        using (System.IO.Stream stream = fileSystem.GetAsStream(virtualPath))

                        {

                            stream.CopyTo(Page.Response.OutputStream);

                            SharedFile.IncrementDownloadCount(sharedFile.ItemId);

                        }

                        try

                        {

                            Page.Response.End();

                        }

                        catch (System.Threading.ThreadAbortException) { }

                        

                        

                    }

                   

                }

                catch (HttpException) { }

               

            }



        }



       



        private bool LoadAndCheckParams()

        {

            bool result = true;



            pageID = WebUtils.ParseInt32FromQueryString("pageid", -1);

            moduleID = WebUtils.ParseInt32FromQueryString("mid", -1);

            fileID = WebUtils.ParseInt32FromQueryString("fileid", -1);

            if (pageID == -1) result = false;

            if (moduleID == -1) result = false;

            if (fileID == -1) result = false;



            if (result)

            {

                sharedFile = new SharedFile(moduleID, fileID);

                result = (sharedFile.ModuleId == moduleID);



                FileSystemProvider p = FileSystemManager.Providers[WebConfigSettings.FileSystemProvider];

                if (p == null)

                {

                    log.Error("Could not load file system provider " + WebConfigSettings.FileSystemProvider);

                    result = false;

                }



                fileSystem = p.GetFileSystem();

                if (fileSystem == null)

                {

                    log.Error("Could not load file system from provider " + WebConfigSettings.FileSystemProvider);

                    result = false;

                }



            }





            return result;



        }



        

    }

}