Download Application Octet Stream File

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Jan 07, 2017 Files without Extensions are Mapped to Application/Octet-Stream. When IIS locates a file that does not have an. It tries to download the file. Apr 17, 2016 AngularJS: Download file with $http and Web API. Return the file stream in a HttpResponseMessage with content type application/octet-stream.

Following an article on how to do this using ASP 3.0, we’ll see how to accomplish the same effect using ASP.NET. Using streams, we can provide a file to the user without the need for FTP or any interference of the Internet Information Server (IIS). The Code Create an ASPX file, called download.aspx.

This file takes a filename as a parameter, and returns the contents of that file in the response stream. ‘Code in ASP to download pdf files in a zip folder Dim File, Archive ‘ Create a temp file to hold the archive Set File = Server.CreateObject(“ActiveFile.File”) File.CreateTemp Application(“MapPath”) & “files tmpfiles” ‘ Create the ZIP archive Set Archive = Server.CreateObject(“ActiveFile.Archive”) Archive.NewArchive File, 0 Archive.Add “filename” Archive.SaveArchive Set Archive = Nothing Response.AddHeader “Content-Disposition”, “attachment; filename=YourSelectedPdfs.zip” File.Download “application/x-zip-compressed”, Now, True, True The code works till the second last line. I can see the that there is a temp file created with the pdf files. But the moment “file.download” is executed it throws an error on server saying ” The web page can not be found”. Can somebody help me to find out what is wrong in last line of the code. If you are getting a 404 error, make sure your IIS is configured to allow you to download ZIP files. Here’s a good explanation of the possible issue and how to fix it: Summary of changes here: The same would apply for any type of files you are having an issue with – you would need to add the file extension permission in the web.config of the website (or machine.config of the server to change all the sites).

I made the suggested change but still I am receiving an error saying “Internet Explorer cannot display the webpage” in IE and ” This webpage is not available” in Chrome. Downloading files is happening when I use the code you have given in the starting of the article. But as I have to download multiple files, I am using ActiveFile component to accumulate all the files through a loop and at the end I am using the last 2 line Response.AddHeader “Content-Disposition”, “attachment; filename=YourSelectedPdfs.zip” File.Download “application/x-zip-compressed”, Now, True, True This works perfectly with Web Server 2003 but not sure whats going wrong with WebServer 2008. Wait, so, are you trying to download numerous files one by one? Because I don’t think you can do that. To manage something like that you would probably need to stream each file in a separate popup via Javascript, and you will run into issues with popup blockers anyway. If you are zipping all the files and downloading the zip file instead, then It should work.

You could try something like DotNetZip, a free component that works nicely. You could then create your PDF files, place them on the server, loop through and create a zip file using that component, and then clear the buffer and send the zip file along to the browser. Theoretically, that should work across all browsers and servers, as long as you have made sure to enable zip file download from your server. I tried this code today.but am getting the following error: Line 19. What needs to change here? URI formats are not supported.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.ArgumentException: URI formats are not supported. Source Error: Line 17: ‘Dim path As String = Server.MapPath(strRequest) ‘get file object as FileInfo Line 18: MsgBox(“TEST2”) Line 19: Dim file As System.IO.FileInfo = New System.IO.FileInfo(strRequest) ‘– if the file exists on the server Line 20: If file.Exists Then ‘set appropriate headers Line 21: MsgBox(“TEST3”).

The says: If this header Content-Disposition: attachment is used in a response with the application/octet-stream content-type, the implied suggestion is that the user agent should not display the response, but directly enter a `save response as.' I read that as Content-Type: application/octet-stream Content-Disposition: attachment But I would have thought that Content-Type would be application/pdf, image/png, etc.

Should I have Content-Type: application/octet-stream if I want browsers to download the file? The content-type should be whatever it is known to be, if you know it. Application/octet-stream is defined as 'arbitrary binary data' in RFC 2046, and there's a definite overlap here of it being appropriate for entities whose sole intended purpose is to be saved to disk, and from that point on be outside of anything 'webby'. Or to look at it from another direction; the only thing one can safely do with application/octet-stream is to save it to file and hope someone else knows what it's for. You can combine the use of Content-Disposition with other content-types, such as image/png or even text/html to indicate you want saving rather than display. It used to be the case that some browsers would ignore it in the case of text/html but I think this was some long time ago at this point (and I'm going to bed soon so I'm not going to start testing a whole bunch of browsers right now; maybe later).

RFC 2616 also mentions the possibility of extension tokens, and these days most browsers recognise inline to mean you do want the entity displayed if possible (that is, if it's a type the browser knows how to display, otherwise it's got no choice in the matter). This is of course the default behaviour anyway, but it means that you can include the filename part of the header, which browsers will use (perhaps with some adjustment so file-extensions match local system norms for the content-type in question, perhaps not) as the suggestion if the user tries to save. Hence: Content-Type: application/octet-stream Content-Disposition: attachment; filename='picture.png' Means 'I don't know what the hell this is.

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Please save it as a file, preferably named picture.png'. Content-Type: image/png Content-Disposition: attachment; filename='picture.png' Means 'This is a PNG image. Please save it as a file, preferably named picture.png'.

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Content-Type: image/png Content-Disposition: inline; filename='picture.png' Means 'This is a PNG image. Please display it unless you don't know how to display PNG images.

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Otherwise, or if the user chooses to save it, we recommend the name picture.png for the file you save it as'. Of those browsers that recognise inline some would always use it, while others would use it if the user had selected 'save link as' but not if they'd selected 'save' while viewing (or at least IE used to be like that, it may have changed some years ago). This was a great answer, and it would really be nice if things worked like that. But unfortunately all browsers are mostly broken. For instance, Google Chrome will not open a 'file save' window for you if this is your response from a form, regardless of including 'Content-Disposition: attachment', even with 'application/octet-stream' as the content-type. And then they print a message saying you may be under attack.

There is just no way of it letting me save a file. You have to configure xdg-open even if you just want to save a file. I'm sick of this. – Apr 4 '15 at 17:44.