S3 support, take 2

[vgskye]

replaces #512. Adds S3 support using my fork of s3-lite to be significantly lighter than aws-sdk, weighing at 100KiB-or-so when using URLConnection and about 1.5MB-or-so when using the supposedly higher-performance Apache HttpComponents client.

[vgskye]

apparently something's broken, sec

[vgskye]

yeah s3-lite's signer seems broken

[vgskye]

all fixed now, seems to be perfectly functional

[TBlueF]

So ...

BlueMap v5.0 (Snapshot) now supports not only native-addons (addons loaded by bluemap), but it is also possible to register new storages or compression etc. via an addon that depends on BlueMapCore/Common.
With that it should be possible to create a plugin that adds S3-Storage support to BlueMap :)

For example here is an addon that adds brotli-support to bluemap: https://github.com/BlueMap-Minecraft/BlueMapBrotli

For S3, you could implement the Storage interface in your addon, and then register it to the StorageType.REGISTRY.

I didn't test it but in theory it should be even possible using a library like: https://github.com/elerch/Amazon-S3-FileSystem-NIO2 or https://github.com/carlspring/s3fs-nio/ to aquire a java.nio.file.Path object and then use that to simply create a new FileStorage(root, compression, false).. If that works, you wouldn't even need to implement the Storage interface at all.

BlueMap 5.0 is still a snapshot, so it's not well tested yet.. but that also means that if you encounter any issues, just tell me and the path to a fix should usually be rather short :)

I will close this PR, since as we already discussed on discord, implementing this as an addon instead of in BlueMap directly is the preferred way :)