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I've uploaded a bunch of images to Amazon S3, and now want to add a Cache-Control header to them.
Can the header be updated without downloading the entire image? If so, how?
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s3 doesn't support editing files... it stores objects that must be rewritten any time you want to update them.
If an object already exists in a bucket, the new object will overwrite it because Amazon S3 stores the last write request.
Using the Range HTTP header in a GET Object request, you can fetch a byte-range from an object, transferring only the specified portion. You can use concurrent connections to Amazon S3 to fetch different byte ranges from within the same object.
To set ACL permissions for an object Sign in to the AWS Management Console and open the Amazon S3 console at https://console.aws.amazon.com/s3/ . In the Buckets list, choose the name of the bucket that contains the object. In the objects list, choose the name of the object for which you want to set permissions.
It's beta functionality, but you can specify new meta data when you copy an object. Specify the same source and destination for the copy, and this has the effect of just updating the meta data on your object.
PUT /myObject HTTP/1.1 Host: mybucket.s3.amazonaws.com x-amz-copy-source: /mybucket/myObject x-amz-metadata-directive: REPLACE x-amz-meta-myKey: newValue If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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