I am using http://pdfobject.com/ to embed PDF files inside a div. Users use several buttons to save metadata in a database for the PDF file. Every time users click on a button the PDF file is retrieved from the server which makes the system slow.
Is there a way to cache the PDF so that it loads only once. There are many PDF files which has different URL's so the best way is cache PDF files based on their URL. How can I cache PDF files in browser based on their URL?
Related
Here is my case:
I'm using ABCPDF to generate a HTML document from a .DOCX file that I need to show on the web.
When you export to HTML from ABCPDF you generate a HTML and a folder with support files (.css, .js, .png)
Now these HTML files may contain quite sensitive data so I immediately after generating the files, I move them to a password-protected .zip file (from which I fetch them later)
The problem is, that this leaves the files unencrypted on the HDD for a few seconds and even longer if I'm (for some reason) unable to delete them at once.
I'd like suggestions for another way of doing this. I've looked in to a ram drive, but I'm not happy with installing such drivers on my servers. (AND the RAM drive would still be accessible from the OS)
The cause of the problem here might be that ABCPDF can only export HTML as files (since its multiple files) and not as a stream.
Any ideas?
I'm using .NET 4.6.x and c#
Since all your files except the .HTML are anonymous, you can use the suggested way of writing the HTML to a stream. Only all other files will be stored to the file system.
http://www.websupergoo.com/helppdfnet/source/5-abcpdf/doc/1-methods/save.htm
When saving to a Stream the format can be indicated using a Doc.SaveOptions.FileExtension property such as ".htm" or ".xps". For HTML you must provide a sensible value for the Doc.SaveOptions.Folder property.
http://www.websupergoo.com/helppdfnet/source/5-abcpdf/xsaveoptions/2-properties/folder.htm
This property specifies the folder where to store additional data such as images and fonts. it is only used when exporting documents to HTML. It is ignored otherwise.
For a start, try using a simple MemoryStream to hold the sensitive data. If you get large files or high traffic, open an encrypted stream to a file on your system.
I am working on a file uploading functionality using ASP.NET, C# and telerik. I am using telerik:RadAsyncUpload control. I already convert the file to byte array and save in the SQLServer Database.
On update page, I need to open file directly(from the binary data saved in db), when I will click a link. I need to Open that file in separate browser tab/window. I do not want to save file Physically on any local drive while retrieving it.
Please help me out.
What I have tried?
For time been, I am saving that binary data in a blank file located at some local drive and then attaching it to that link. but I do not want to save file Physically on any local drive while retrieving it. I want .....when user will click link binary data will directly flush on separate browser tab and he can view the file.
Create a handler (arbitrary one or an aspx page, whatever you find easier) that will read the database (e.g., based on a querystring argument) and return the appropriate response (via the Response object, e.g., Response.BinaryWrite()).
Note that you should set the appropriate headers and that depending on the type of file you return the browser may prompt the user to open/save it instead of opening it inline. You have some control over that via the content-disposition HTTP header, but it is ultimately up to the browser.
Also, you may want to use a RadWindow to open that handler to keep browser popups to a minimum to reduce the risk of them getting blocked by the browser.
On my site, I'm displaying several different types of files in the browser, like images, text files, etc. One of the files I want to display is a Visio document.
To display it on a page, I'm creating an iframe with the source set to the url of the .vsd file. This works fine in IE, but not in any other browser. IE will display the file, but the other browsers just open the download dialog to save the file.
Is there a way to embed a .vsd file in other browsers?
How do I open a PDF file List in dialog box in a new Window in an ASP.NET application ?
I want list of pdf file which is stored in folder in my application and then select any of pdf and save in logged user's particular folder.
Since you want to display a list of pdf files stored in a folder on the server side you will need to render the list to a page in some format that makes sense. You may open that up as a dialog (perhaps using something like jquery ui) but it wouldn't be necessary.
Next to each file you could have a button that indicates the action you are after, say 'Copy'.
This would then send the id/name of the relevant file to the server and the server code could copy the file to some other location on the server that you refer to as the users folder.
However, if you want to download the file to the user's machine that is something else and you will find many answer here on SO about that.
I am writing a website to consolidate a bunch of XML files with data into one MySQL database. I need to have a way to allow users to select a directory on their computer that contains a bunch of xml files. The site then reads each of those files and takes care of consolidating the information.
Is there a simple way (like the default open file dialog for win forms and wpf) to bring up a file dialog on a users computer, let the user pick a directory, and then be able to read the xml files in the selected directory? Would I have to upload them to the site temporarily first? Or could I just access them on the users computer?
Thanks!!
You can't access files from a webserver directly. You would need to write an ActiveX Control if you really don't find another way.
The standard conform way it just uploading one or more files with the browser fileupload:
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.fileupload.aspx
I would suggest that the user should zip the files and just upload the zip file.
There are some hacks - but I don't think it fits:
http://the-stickman.com/web-development/javascript/upload-multiple-files-with-a-single-file-element/
http://dotnetslackers.com/articles/aspnet/Upload_multiple_files_using_the_HtmlInputFile_control.aspx
I think you have to have a web dialog to upload the files to a temp location like you already mentioned and do the consolidation there before committing to your database. Or, maybe you can do the consolidation in JavaScript in the user's browser instance.