protected void DeletePreview_Click(object sender, EventArgs e)
{
AssetPreviewInfo info = new AssetPreviewInfo(Asset);
if (info.FileExists)
{
try
{
File.Delete(info.FilePath);
AssetPreview1.Asset = Asset;
FeedbackLabel1.SetSuccessMessage("Preview deleted successfully");
ConfigurePreviewSettings();
PreviewExtensionLabel.Text = String.Empty;
}
catch (Exception ex)
{
ExceptionHandler.HandleException(ex, "Error deleting preview");
FeedbackLabel1.SetErrorMessage("Error deleting preview: " + ex.Message);
}
}
else
{
FeedbackLabel1.SetErrorMessage("Preview file does not exist");
}
}
public override void ProcessRequest()
{
int assetId = GetIdFromFilename();
Asset asset = Asset.Get(assetId);
if (asset.IsNull)
{
throw new HttpException(500, "Asset does not exist");
}
string filename = string.Empty;
if (EntitySecurityManager.CanUserViewAssetPreview(SessionInfo.Current.User, asset))
{
AssetPreviewInfo info = new AssetPreviewInfo(asset);
filename = info.FilePath;
}
if (filename == string.Empty)
{
filename = (asset.IsProcessed) ? "Unavailable.gif" : "Processing.gif";
filename = Context.Server.MapPath("~/Images/Asset/Previews/" + filename);
}
WriteFileToResponseStream(filename);
}
private void SetPreviewSettingsLabels()
{
if (IsSelectedPluginNonDefault())
{
PluginStatusLabel.SetErrorMessage("User selected preview, this is not guaranteed to be compatible with this asset");
}
else
{
PluginStatusLabel.SetSuccessMessage("Default Preview Plug-in for this file type");
}
//preview file extension label
AssetPreviewInfo info = new AssetPreviewInfo(Asset);
string fileExtension = StringUtils.GetFileExtension(info.FilePath);
PreviewExtensionLabel.Text = String.Format("Preview file type: {0}", fileExtension);
//labels for accepted extensions
string acceptExtensions = string.Join(",", m_AllowedPreviewExtensions.ToArray());
AcceptedPreviewFormatLabel.Text = String.Format("Accepted Preview File Formats: {0}", acceptExtensions);
AcceptedPreviewFormatThumbnailLabel.Text = String.Format("Accepted Thumbnail File Formats: {0}", "JPEG");
}
protected override void Render(HtmlTextWriter writer)
{
if (Asset.IsNull)
{
// No asset
WriteImage(writer, "~/Images/Spacer.gif");
return;
}
if (!EntitySecurityManager.CanUserViewAssetPreview(SessionInfo.Current.User, Asset))
{
// Access denied
WriteImage(writer, "~/Images/Spacer.gif");
return;
}
// The asset has not been marked as processed, so show a 'processing' image placeholder
// instead, even if the filepath is not empty. This is because the file may exist, but
// may still have data being written to it by another process, so we don't have any
// guarantee that it's safe to display to the user.
if (!Asset.IsProcessed)
{
WriteImage(writer, "~/Images/Asset/Previews/Processing.gif");
return;
}
// Get asset File Info
AssetPreviewInfo info = new AssetPreviewInfo(Asset);
// If we don't have an asset preview file. Show a placeholder image instead.
if (!info.FileExists)
{
WriteImage(writer, "~/Images/Asset/Previews/Unavailable.gif");
return;
}
// Setup variables to be replaced
string assetPreviewFileExtension = StringUtils.GetFileExtension(info.FilePath);
string assetPreviewUrl = AssetFileUrlHelper.GetPreviewUrl(Asset.AssetId);
string assetPreviewRelativeUrl = ResolveUrl(assetPreviewUrl);
string assetPreviewAbsoluteUrl = SiteUtils.GetWebsiteUrl(assetPreviewUrl);
string playerId = ClientID + "_Preview";
string rtmpStreamingServer = ConfigurationManager.AppSettings.GetValue("RTMPStreamingServer");
// If the streaming server is enabled, then hack the file extension to get the correct markup
if (assetPreviewFileExtension == "flv" && !StringUtils.IsBlank(rtmpStreamingServer))
{
assetPreviewFileExtension += "-streaming";
}
//get the plugin context type
//use query string if specified otherwise use AdminSessionInfo
ContextType contextType;
if (HttpContext.Current.Request.QueryString["ctxt"] != null)
{
contextType = PluginManager.GetContextType(HttpContext.Current.Request.QueryString["ctxt"]);
}
else
{
contextType = SessionInfo.Current.AdminSessionInfo.AssetContext;
}
//get the plugin for the asset
Plugin plugin = ContextInfo.PluginManager.GetPluginForAsset(Asset);
//get the plugins relative URL
string relativePluginUrl = ResolveUrl(plugin.RelativePath);
// Get the HTML
string markup = ContextInfo.PluginManager.GetMarkup(plugin, contextType);
// We can override images
if (StringUtils.IsBlank(markup) && AssetTypeChecker.IsImage(assetPreviewFileExtension))
{
WriteImage(writer, assetPreviewUrl);
return;
}
// Otherwise, ensure we have markup
if (string.IsNullOrEmpty(markup))
{
writer.Write(string.Format("[Unable to preview: {0}]", assetPreviewFileExtension));
return;
}
// Replace params
markup = markup.Replace("[ASSET-PREVIEW-URL]", assetPreviewUrl);
markup = markup.Replace("[RELATIVE-PREVIEW-URL]", assetPreviewRelativeUrl);
markup = markup.Replace("[ABSOLUTE-PREVIEW-URL]", assetPreviewAbsoluteUrl);
markup = markup.Replace("[FOCUSOPEN-PREVIEW-FILENAME]", Path.GetFileName(info.FilePath));
markup = markup.Replace("[PLAYER-ID]", playerId);
markup = markup.Replace("[ASSET-ID]", Asset.AssetId.ToString());
markup = markup.Replace("[ASSET-REFERENCE]", info.Asset.FileReference);
markup = markup.Replace("[STREAMING-SERVER-URL]", rtmpStreamingServer);
markup = markup.Replace("[USER-ID]", SessionInfo.Current.User.UserId.GetValueOrDefault().ToString());
markup = markup.Replace("[PREVIEW-FILE-EXTENSION]", assetPreviewFileExtension);
markup = markup.Replace("[ASSET-TYPE-ID]", Asset.AssetTypeId.ToString());
markup = markup.Replace("[ASSET-TYPE-NAME]", Asset.AssetType.Name);
markup = markup.Replace("[PREVIEW-AVAILABLE]", (info.PreviewAvailable ? "true" : "false"));
markup = markup.Replace("[PLUGIN-URL]", relativePluginUrl);
markup = markup.Replace("[SESSIONAPITOKEN]", SessionInfo.Current.User.SessionAPIToken);
markup = markup.Replace("~/", WebUtils.GetApplicationPath());
// Write the HTML to the page
writer.Write(markup);
}
protected override void Render(HtmlTextWriter writer)
{
if (Asset.IsNull)
{
// No asset
WriteImage(writer, "~/Images/Asset/Previews/Unavailable.gif");
return;
}
if (!EntitySecurityManager.CanUserViewAssetPreview(SessionInfo.Current.User, Asset))
{
// Access denied
WriteImage(writer, "~/Images/Asset/Previews/Unavailable.gif");
return;
}
// The asset has not been marked as processed, so show a 'processing' image placeholder
// instead, even if the filepath is not empty. This is because the file may exist, but
// may still have data being written to it by another process, so we don't have any
// guarantee that it's safe to display to the user.
if (!Asset.IsProcessed)
{
WriteImage(writer, "~/Images/Asset/Previews/Processing.gif");
return;
}
// Get asset File Info
AssetPreviewInfo info = new AssetPreviewInfo(Asset);
// If we don't have an asset preview file. Show a placeholder image instead.
if (!info.FileExists)
{
WriteImage(writer, "~/Images/Asset/Previews/Unavailable.gif");
return;
}
// Setup variables to be replaced
string fileExtension = StringUtils.GetFileExtension(info.FilePath);
string assetPreviewUrl = AssetFileUrlHelper.GetPreviewUrl(Asset.AssetId);
string relativePreviewUrl = ResolveUrl(assetPreviewUrl);
string absolutePreviewUrl = SiteUtils.GetWebsiteUrl(assetPreviewUrl);
string playerId = ClientID + "_Preview";
string rtmpStreamingServer = ConfigurationManager.AppSettings.GetValue("RTMPStreamingServer");
// If the streaming server is enabled, then hack the file extension to get the correct markup
if (fileExtension == "flv" && !StringUtils.IsBlank(rtmpStreamingServer))
{
fileExtension += "-streaming";
}
//gets the plugin to be tested
Plugin plugin = ContextInfo.PluginManager.GetAnyPluginById(PluginId);
if (!plugin.IsNull && plugin.HasPluginFile)
{
//ensure asset is of the right file type or force preview set
if (!plugin.PluginFile.FileExtensions.Contains(fileExtension, StringComparer.OrdinalIgnoreCase) && !plugin.PluginFile.ForcePreviewFormat)
{
writer.Write(string.Format("[Plugin does not support file extension: {0}]", fileExtension));
return;
}
}
else
{
writer.Write(string.Format("[Invalid plugin: {0}]", plugin.Name));
return;
}
//get the plugins relative URL
string relativePluginUrl = ResolveUrl(plugin.RelativePath);
// Get the HTML
string markup = ContextInfo.PluginManager.GetMarkup(plugin, ContextType);
// Otherwise, ensure we have markup
if (string.IsNullOrEmpty(markup))
{
writer.Write(string.Format("[Unable to preview asset: {0}]", Asset.AssetId));
return;
}
// Replace params
markup = markup.Replace("[ASSET-PREVIEW-URL]", assetPreviewUrl);
markup = markup.Replace("[RELATIVE-PREVIEW-URL]", relativePreviewUrl);
markup = markup.Replace("[ABSOLUTE-PREVIEW-URL]", absolutePreviewUrl);
markup = markup.Replace("[FOCUSOPEN-PREVIEW-FILENAME]", Path.GetFileName(info.FilePath));
markup = markup.Replace("[PLAYER-ID]", playerId);
markup = markup.Replace("[ASSET-ID]", Asset.AssetId.ToString());
markup = markup.Replace("[ASSET-REFERENCE]", info.Asset.FileReference);
markup = markup.Replace("[STREAMING-SERVER-URL]", rtmpStreamingServer);
markup = markup.Replace("[USER-ID]", SessionInfo.Current.User.UserId.GetValueOrDefault().ToString());
markup = markup.Replace("[PREVIEW-FILE-EXTENSION]", fileExtension);
markup = markup.Replace("[ASSET-TYPE-ID]", Asset.AssetTypeId.ToString());
markup = markup.Replace("[ASSET-TYPE-NAME]", Asset.AssetType.Name);
markup = markup.Replace("[PREVIEW-AVAILABLE]", (info.PreviewAvailable?"true":"false"));
markup = markup.Replace("[PLUGIN-URL]", relativePluginUrl);
markup = markup.Replace("~/", WebUtils.GetApplicationPath());
// Write the HTML to the page
writer.Write(markup);
}
