frdl/cta

Content-addressable storage for PHP.

v0.0.1 2022-09-10 13:43 UTC

Requires

• php: >=7.1 | >=8.0
• frdl/context: >=0.3.0.1

MIT

README

Content-addressable storage for PHP. work in progress! (ALPHA version)

Idea

Save Contents

• Split Contents into chunks (of equal length)/save to ChunkStorage
• Concat ChunkHashes into FileStorage Entry
• Save header lines and FileStorage Entry CTA-Hash into UriStorage

Read/Serve Contents

• Serve header lines from UriStorage (if for Browser/Download)
• Look up FileStorage Entry in UriStorage
• Look up ChunkHashes in FileStorage
• Concat chunks from ChunkStorage to output contents

spec

content-addressable - 1.3.6.1.4.1.37553.8.1.8.1.16606

• 1.3.6.1.4.1.37553.8.1.8.1.16606- CTA paradigmas where we do NOT track for hash collisions.
• 1.3.6.1.4.1.37553.8.1.8.1.16606.1.56234465 - To reduce the possibility of collisions we store the hash along with the content-size.
• 1.3.6.1.4.1.37553.8.1.8.1.16606.1.27200801029 - Files/content is saved into chunks of the same size/length.

Server - frdl\cta\Server::class

• UriStorage where we store references: uri[hash]<->file[hash]<->chunks[hashes]
• UriStorage where we store (and may serve) headers associated to a file.