Application/octet-stream means that the sender of the data (probably an HTTP server) had no idea what the data is. It's just an arbitrary data dump. 'that's because this page is meant to send binay content (the attachment) to the browser Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) 'an email on the filesystem Dim filename As String = 'testEmail.eml' 'open the email Dim sr As StreamReader = New StreamReader(Server.MapPath(filename)) Dim emailContents As String. Table of Contents • • • • • Windows cannot open this file: example.arf To open this file, Windows needs to know what program you want to use to open it. If you don't know how to set the.arf file association, check the. Can I change the extension of files? Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format. If you have helpful information about the.arf file extension,! Rate our ARF page Please help us by rating our ARF page on a 5-star rating system below. (1 star is poor, 5 star is excellent) ★ ★ ★ ★ ★ 4 of 5 stars ( 1 votes). Oct 19, 2018 - Content-Disposition: attachment;filename=LISTADO PROYECTOS APROBADOS 1 CONVOC v1_ES.xls Content-Type: application/octet-stream. Application/octet-stream FilenameIn most cases, the following should work: Content-type: application/octet-stream Content-Disposition: attachment; filename='myfile.txt' There are some marginal cases of browsers that will still display it as a text file, but none of the mainstream browsers will (I'm talking about browsers embedded in some MIDs). EDIT: When this answer was originally published, sending the Mime-Type application/octet-stream was the only reliable way to trigger a download in some browsers. Now in 2016, if you do not need to support an ancient browser, you can safely specify the proper mime-type. Attention, Internet Explorer User Announcement: Oracle Community has discontinued support for Internet Explorer 7 and below. In order to provide the best platform for continued innovation, Oracle Community no longer supports Internet Explorer 7. Oracle Community will not function with this version of Internet Explorer. Please consider upgrading to a more recent version of Internet Explorer, or trying another browser such as Firefox, Safari, or Google Chrome. (Please remember to honor your company's IT policies before installing new software!) • • • •. What is an OCTET-STREAM file? The OCTET-STREAM format is used for file attachments on the Web with an unknown file type. These.octet-stream files are arbitrary binary data files that may be in any multimedia format. The OCTET-STREAM format was developed for Web browsers to understand that the file attachment is in an unknown file type, which also allows the user to choose to download and save the attached file in any file format that the user wants. In other instances, the OCTET-STREAM file format is used to inform the user that the attached file may be saved in a recommended file format. This also allows the Web browser to enable the user to know the recommended file format for the attached.octet-stream file. These OCTET-STREAM files may be opened by renaming the extension of the attached file to a specific file extension, and then by using an application with support for opening such files. For example, an.octet-stream file may be renamed to a.txt file (if it is indeed a.txt file), and Notepad may then be used to open the file. This means the user needs to know the file type of the attached.octet-stream file before renaming the file in the correct file extension. • What is a file extension? A file extension is the characters after the last dot in a file name. For example, in the file name 'winmail.dat', the file extension is 'dat'. It helps Windows select the right program to open the file. • We help you open your file We have a huge database of file extensions (file types) with detailed descriptions. We hand pick programs that we know can open or otherwise handle each specific type of file. • Original downloads only All software listed on file.org is hosted and delivered directly by the manufacturers. We do not host downloads on our own, but point you to the newest, original downloads. A number of us are using a private site where we run an application offline. The application offers a download button so that we can take a snapshot of our offline progress, a sort of backup. When we go back on-line we can either upload the the information from the application or we can upload the backup files. The problem is that whenever we hit the download button we always get the extra dialog asking if we want to save or cancel the file download. This might sound a little ridiculous, but we really do not want to have to move the mouse to the new dialog and have to click the Save button. The file mime type is application/octet-stream, there is no file extension. Is there a way to change the Firefox configuration so that this dialog does not appear? Apologies, but I have deleted all of the system information gathered automatically because I am not able to submit this request from the machines where the problem occurs. Those system are: Ubuntu 14:04.3 LTS Firefox 40.0.3. A number of us are using a private site where we run an application offline. The application offers a download button so that we can take a snapshot of our offline progress, a sort of backup. When we go back on-line we can either upload the the information from the application or we can upload the backup files. The problem is that whenever we hit the download button we always get the extra dialog asking if we want to save or cancel the file download. This might sound a little ridiculous, but we really do not want to have to move the mouse to the new dialog and have to click the Save button. The file mime type is application/octet-stream, there is no file extension. Is there a way to change the Firefox configuration so that this dialog does not appear? Apologies, but I have deleted all of the system information gathered automatically because I am not able to submit this request from the machines where the problem occurs. Those system are: Ubuntu 14:04.3 LTS Firefox 40.0.3. Can't open a.ide file? If you want to open a.ide file on your computer, you just need to have the appropriate program installed. If the.ide association isn't set correctly, you may receive the following error message: Windows can't open this file: File: example.ide To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer. To change file associations: • Right-click a file with the extension whose association you want to change, and then click Open With. • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want. • Select the Always use the selected program to open this kind of file check box. ![]() ![]() This question already has an answer here: • 16 answers I'm working on a text editor in pure Javascript. I'd like it so that when the user clicks the 'Save' button, the editor downloads the file. I've already got this partly working: uriContent = 'data:application/octet-stream,' + encodeURIComponent(codeMirror.getValue()); newWindow=window.open(uriContent, 'filename.txt'); The file downloads, but the problem is that the file is named 'download'. Question: How could I change the name of the file to be anything I want, e.g filename.txt?
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