Forcing Download from s3 amazon servers

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I've been developing a new web application which relies on Amazon S3 servers as storage system, and Codeiginter as the PHP framework.

I need to force the file to download when the link is clicked. The original URL looks like this:

http://www.our-web.com/download/do/1.jpg

which generates a temporary signed URL to the actual file on the Amazon S3 servers like this:

http://main_bucket.s3.amazonaws.com/post/1/1.jpg?AWSAccessKeyId=AKIAJEOQKYPKC3CCU5RA&Expires=1305395426&Signature=iuzCdA22gImLK192%2BMAhk8OkAY8%3D

I need to make the file start downloading from the real Amazon URL it soon as the user clicks the link.

I have two ways now to do so:

  1. Use redirect() which will open the file not download it; or
  2. Alter headers as this code:

    header('Content-type: application/force-download');
    header('Content-Disposition: attachment; filename=' . $file_name);
    header('Content-Transfer-Encoding: binary');
    header('Expires: 4000');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Pragma: public');
    header('Content-Length: ' . filesize($generated_file));
    
    readfile($generated_file);
    

Unfortunately, both ways don't help me. The second method causes the download to come from my website and not from directly from Amazon.

How can I force the file to download directly from the Amazon S3 servers, and not from my website?

You just need to set the correct headers on your files in S3 in order to force the browser to download rather than opening the file. Set these:

Content-Disposition: attachment; filename=FILENAME.EXT
Content-Type: application/octet-stream

You will need to set them when uploading the files to S3. With the php SDK you'd use create_object.

Or you can set these after uploading using 'change_content_type' or by copying the file to itself in S3 and setting the correct headers.

Amazon S3 - Forcing files to download, Functional cookies help us provide useful site features, remember your preferences, and display relevant content. Approved third parties may� Download the video direct from S3 to Client (forcing a download prompt) Now if you upload a video directly to S3 then simply have a link on your page to the video. By default the video will stream down. This is normal behaviour but when you want to force a download prompt it gets a tad tricky.

Bit late to the party, but often times with a file you don't want to have to decide at storage time how it will be used. You want to be able to store the file once, then in one area possibly embed the file or display in browser, and in another area enable the user to download the same file.

Fortunately you can do that by providing override parameters in the request url. It only works with signed requests, but thankfully you're already doing that.

If you add a parameter like &request-content-type="application/force-download" that should do the trick.

Check out the Request Parameters section of the S3 GET Object documentation: http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html

Force to display not download from S3, This is really rather easy to set up in AWS, and since I've been working on the whilst also forcing downloads and specifying pretty file names. So if you offer big download files, you should think about using the S3 services to increase your speed and customer satisfaction. Using Download Monitor And Amazon S3. When using Download Monitor, you can get the Amazon S3 extension, which will help you to easily connect your downloads to the files on the Amazon Web Servers. The setup is easy

AWS S3: how to download file instead of displaying in-browser, We're hosting our media files on AWS and when I use your plugin, those files are opening in the browser. I'd like them to force-download. Also worth mentioning is you are able to hard-set the headers for files in S3. For example, if you need to force-download a certain file you can set the appropriate headers for that file. Such as defaulting to stream, and either having a secondary file set to force-download or spend the bandwidth to use php/fputs and force-download via PHP.

If your S3 website is behind CloudFront, don't forget to invalidate the file before trying again! That will clear the cached file.

You can get to the invalidation page by going to:

Cloudfront -> Distribution Settings -> Invalidation

Then enter the path to the file.

It will take some time to invalidate the file. For my file it took 5 minutes.

Force download files from AWS?, Amazon's S3 is a great solution for storing files, and Laravel makes it easy to use. Occasionally you'll need to force files to download instead of� Marketplace sellers can upload downloadable products to the Amazon S3 server and will get a link that customers can use to download the file from the Amazon server.

You can't tell the browser how to handle a remote file. By redirecting to amazon you're telling the browser to start a new request over there. You don't have any control over that request.

The only solution I can think of is to package the image into a zip file or similar. Of course that adds another (probably annoying) form of complexity.

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S3 Browser, Amazon S3 or Amazon Simple Storage Service is a service offered by Amazon Web Services Additionally, objects can be downloaded using the HTTP GET interface and the BitTorrent protocol. OpenShift � PythonAnywhere � RightScale � Scalr � Force.com � SAP Cloud Platform � VMware vCloud Air � WaveMaker. Amazon S3 provides easy-to-use management features so you can organize your data and configure finely-tuned access controls to meet your specific business, organizational, and compliance requirements. Amazon S3 is designed for 99.999999999% (11 9's) of durability, and stores data for millions of applications for companies all around the world.

Comments
  • use file_get_contents or a cURL to retrive the S3 file then do a passthrough with the headers
  • That's what he'd doing with readfile.
  • correct, but even though I don't want the client to download the file through my website. there must be a better solution to download from another domain.
  • Pulling the file through your site is a terrible idea if you're trying to take advantage of cloudfront, which potentially distributes your content to up to 19 edge nodes.
  • it's been solved by changing the file meta as this code says: $opt['meta']['Content-Type'] = 'binary/octet-stream';
  • @Khaled - Great. Glad to help:)
  • I believe the only thing actually needed is content disposition header. No need to set content type.
  • I believe the correct request parameter is request-content-disposition=attachment; filename=FILENAME.EXT". Your request-content-type is working because it's an unknown content type so the browser downloads it by default.
  • Brilliant, yes this is what I was after. Would rather not decide this at storage time (particularly since there's thousands of files already in S3 that I don't want to have to modify).
  • as of 2019 it's actually response-content-disposition=attachment;%20FILENAME.EXT
  • Documentation for Luke's comment here docs.aws.amazon.com/AmazonS3/latest/API/…
  • Very useful since this answer ranks highly in google searches, and I needed to show a non tech person how to do this on AWS.
  • the image is just an example, maybe I forget to mention that several files type is allowed specially pdf, and docx. Anyway, thanks for the responce, but I think there is a way to figure this out. Actually many big websites uses external storage system.
  • I was not aware of the possibility of setting headers when uploading a file to S3. That is nice to know.
  • it is possible, I think amazon has yet has better solutions to provide, the reason why we chosen amazon s3 because it has direct upload using POST directly from browser. thanks for the help anyway