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I have customer files uploaded to Amazon S3, and I would like to add a feature to count the size of those files for each customer. Is there a way to "peek" into the file size without downloading them? I know you can view from the Amazon control panel but I need to do it pro grammatically.
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Reading objects without downloading them Similarly, if you want to upload and read small pieces of textual data such as quotes, tweets, or news articles, you can do that using the S3 resource method put(), as demonstrated in the example below (Gist).
Open the AWS S3 console and click on your bucket. Click on the Metrics tab. The Total bucket size graph in the Bucket Metrics section shows the total size of the objects in the bucket.
Individual Amazon S3 objects can range in size from a minimum of 0 bytes to a maximum of 5 TB. The largest object that can be uploaded in a single PUT is 5 GB.
Open the AWS S3 console and click on your bucket's name. In the Objects tab, click the top row checkbox to select all files and folders or select the folders you want to count the files for. Click on the Actions button and select Calculate total size.
Send an HTTP HEAD request to the object. A HEAD request will retrieve the same HTTP headers as a GET request, but it will not retrieve the body of the object (saving you bandwidth). You can then parse out the Content-Length header value from the HTTP response headers.
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