How do you search an amazon s3 bucket?

S3 doesn't have a native "search this bucket" since the actual content is unknown - also, since S3 is key/value based there is no native way to access many nodes at once ala more traditional datastores that offer a (SELECT * FROM ... WHERE ...) (in a SQL model) What you will need to do is perform ListBucket to get a a listing of objects in the bucket and then iterate over every item performing a custom operation that you implement - which is your searching.

S3 doesn't have a native "search this bucket" since the actual content is unknown - also, since S3 is key/value based there is no native way to access many nodes at once ala more traditional datastores that offer a (SELECT * FROM ... WHERE ...) (in a SQL model). What you will need to do is perform ListBucket to get a a listing of objects in the bucket and then iterate over every item performing a custom operation that you implement - which is your searching.

There are (at least) two different use cases which could be described as "search the bucket": Search for something inside every object stored at the bucket; this assumes a common format for all the objects in that bucket (say, text files), etc etc. For something like this, you're forced to do what Cody Caughlan just answered. The AWS S3 docs has example code showing how to do this with the AWS SDK for Java: Listing Keys Using the AWS SDK for Java (there you'll also find PHP and C# examples). List item Search for something in the object keys contained in that bucket; S3 does have partial support for this, in the form of allowing prefix exact matches + collapsing matches after a delimiter.

This is explained in more detail at the AWS S3 Developer Guide. This allows, for example, to implement "folders" through using as object keys something like folder/subfolder/file. Txt If you follow this convention, most of the S3 GUIs (such as the AWS Console) will show you a folder view of your bucket.

Whilst searching for an answer myself, I happened across this extremely interesting article: aws.amazon.com/code/1465.

You can mount the S3 bucket using s3fuse (code.google.com/p/s3fs/wiki/Installation...) and then install SearchBlox on the server to index and search through the files. Both tools are free and work very well in multiple environments!

Another option is to mirror the S3 bucket on your web server and traverse locally. The trick is that the local files are empty and only used as a skeleton. Alternatively, the local files could hold useful meta data that you normally would need to get from S3 (e.g. Filesize, mimetype, author, timestamp, uuid).

When you provide a URL to download the file, search locally and but provide a link to the S3 address. Local file traversing is easy and this approach for S3 management is language agnostic. Local file traversing also avoids maintaining and querying a database of files or delays making a series of remote API calls to authenticate and get the bucket contents.

You could allow users to upload files directly to your server via FTP or HTTP and then transfer a batch of new and updated files to Amazon at off peak times by just recursing over the directories for files with any size. On the completion of a file transfer to Amazon, replace the web server file with an empty one of the same name. If a local file has any filesize then serve it directly because its awaiting batch transfer.

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