CONTENT-TYPE APPLICATION/FORCE- PDF
Solved: When adding a PDF as attachment to a page, the content type of the attachment is usually set to application/pdf. However, sometimes it is. To indicate to the browser that the file should be viewed in the browser: Content- Type: application/pdf Content-Disposition: inline; filename="worldcreation.info". It#;s quite a common scenario with the web to want to force a file to some http response headers: Content-Type: application/octet-stream.
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I'm trying to force the download of an adobe pdf file, and I don't want to If this header is used in a response with the application/octet- stream content-type, the . Force Downloads by setting the correct mime type. GitHub Gist: instantly share code, notes, and snippets. File Entity PDF files for download via the "Download link" formatter. Content- Type: application/force-download Content-Disposition.
Turn it on XSendFile on Whitelist a target directory.
Force Files to Download (Not Open in Browser)
Just a note: A mime-type-independent forced download can also be conducted by using: Mon, 26 Jul If you are looking for an algorithm that will allow you to download force download a big file, may this one will help you. File Transfer' ; header 'Content-Type: Using pieces of the forced download script, adding in MySQL database functions, and hiding the file location for security was what we needed for downloading wmv files from our members creations without prompting Media player as well as secure the file itself and use only database queries.
Something to the effect below, very customizable for private access, remote files, and keeping order of your online media. Of course you need to setup the DB, table, and columns. I have a link on my site to a script that outputs an XML file to the browser with the below code: However, if this setting is checked, and browser windows are being re-used, then it will open up on top of the page where the link was clicked to access the script.
But, if the setting is unchecked, the output XML file will open up in a new window and there will be another blank window also open that has the address of the script, in addition to our original window. This is far from ideal, and there is no way of knowing whether users have this option checked or not.
But there are some headers, which PHP itself outputs automatically, disturbing this.
Server content-type setting for PDF
So I wrote this function with erasing these. I think that readfile suffers from the maximum script execution time. The readfile is always completed even if it exceed the default 30 seconds limit, then the script is aborted. Be warned that you can get very odd behaviour not only on large files, but also on small files if the user has a slow connection.
I wasted days trying to figure this out before I found the problem was easily solved. I'm sure many of you out there have had similar problem when trying to use readfile to output images with a php file as the "src" of a "img" tag.
It works fine "as is" in Firefox but not in IE, Safari or g. I found hundreds of results on google all saying things like "there must be white space at the end of you code", "you need this header or that header". I couldn't believe what the solution was but here it is anyway!
Remove the "Width" and "Height" attributes from your "img" tag. Test especially for strings like ".. If possible only permit characters a-z, A-Z and and make it possible to only download from one "download-folder". Beware - the chunky readfile suggested by Rob Funk can easily exceed you maximum script execution time 30 seconds by default.
I didn't benchmark further, but I'd be willing to bet non-mmap'able streams still win because they can loop in C instead of PHP.
How can I force a file to be downloaded?
If you are using the procedures outlined in this article to force sending a file to a user, you may find that the "Content-Length" header is not being sent on some servers. The reason this occurs is because some servers are setup by default to enable gzip compression, which sends an additional header for such operations.
This additional header is "Transfer-Encoding: Of course, this is not required if you are using the intelligent versions of readfile in this article. A missing Content-Length header implies the following: The easiest way to disable this behaviour is with the following.
SetEnv no-gzip dont-vary. Elliott Brueggeman What's the point of a user's settings if not to determine their environment? If they have it set a specific way, honor their setting.
To use readfile it is absolutely necessary to set the mime-type before. If you are using an Apache, it's quite simple to figure out the correct mime type.
The content-disposition header overrides the browser's inline-display feature
Apache has a file called "mime. Use this or another function to get a list of mime-types: Cheers Philipp Heckel. Beware of using download managers.. As a developer, being able to force the download of any type of file is extremely useful.
The argument of whether or not it is considered "good practice" to force users to download files rather than letting their browser handle them as exepected does not really have a place in this article.
In some cases it is appropriate while in others it is probably not. It has been a convenience the many times I have used it to push CSV files out to end users who wouldn't know enough to copy and paste the data from the browser window into a file and then save it.
It is also handy for when you generate PDF files and want to push them to the user as a download rather than have it open up inside the browser window. Not only does this make the PDF easier for the user to download, it also provides consistency for the way downloads are handled regardless of what browser plug-ins the user has installed. Again, in some cases it is appropriate to force a download, in others it is not. The Force Download Script After rigorous browser testing and code tweaking, here is the script I ended up with.
All of the unnecessary stuff has been stripped out and it has been simplified as much as possible.
How do I force files to open in the browser instead of downloading (PDF)?
Users who are directed to the script will be prompted to download the appropriate file regardless of their browser and plug-in settings. This opens up a major security hole if you are passing the actual filename using GET or POST form data or anything else that the user can spoof.
A curious user could easily gain access to sensitive database connection information or other system data by entering something like?
You should always use some kind of identifier to prevent unauthorized access to sensitive information.I have used this a lot with excel and pdf files: This opens up a major security hole if you are passing the actual filename using GET or POST form data or anything else that the user can spoof. Need help with downloading?
I run a Win32 PPM repository for perl 5.
Yeah, that seems like a problem, but I'm getting the correct file name downloaded - but it's a zero byte file. It's also proved to be much faster for basically any file. I think that you might be on to something, but I'm not sure that I'm sure how to implement this into my script.
With such a header the download will still happen, but the desired filename will be lost. A URL can be used as a filename with this function if the fopen wrappers have been enabled.
The password check would then be done by the script that receives the form and delivers the download.
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