3 ms·

Why is it useful?

• mdaniel 4y ago
  That's a complicated question but allows highlighting what I was bringing up: the Key is any unicode character[1] so while it has become conventional to use "/", imagine if you wanted to store the output of exploded jar files in S3, but be able to "list the directory" of a jar's contents: `PutObject("/some-path/my.jar!/META-INF/MANIFEST.MF", "Manifest-Version: 1.0")` Now you can `ListObjects(Prefix="/some-path/my.jar", Delimiter="!")` to get the "interior files" back. I'm sure there are others, that's just one that I could think of off the top of my head. Mapping a URL and its interior resources would be another (`"https://example.com\t/script[1] https://example.com\t/script[1]", "console.log('hello, world')")` Further fun fact that even I didn't know until searching for other examples: "delimiter" is a string and thus can be `Delimiter=unknown` or such: https://github.com/aws/aws-sdk-go/issues/2130 https://github.com/aws/aws-sdk-go/issues/2130 1: see the ListObject page under "encoding-type"
  • selfhoster11 4y ago
    Minio supports virtual ZIP directories for such use cases. In your example, as long as this was enabled and your jar file was properly detected, you could submit a GET for "/some-path/my.jar/META-INF/MANIFEST.MF" and get the contents of that file just fine.
    • mdaniel 4y ago
      One will observe I said list, not get, although in this case it's likely a non-issue because Minio supports the S3 API https://github.com/minio/minio-go/blob/v7.0.45/api-list.go#L171 https://github.com/minio/minio-go/blob/v7.0.45/api-list.go#L... and thus should support the 2nd example I provided, too
• orf 4y ago
  Imagine you have a billion files in a “directory”. Being able to find files that start with “xyz” in constant time is a very, very useful property.