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simple-object-server/README.md
2025-05-03 10:24:02 +12:00

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# simple_object_storage Template Registry
## Introduction
The simple_object_storage template registry is a very simple C++ webserver
which provide a store of binary objects (the objects can be large),
which are available over http.
Read access is public.
Write access is controlled by tokens.
- Objects are access via a label and tag, or via their hash. For example:
- `wget http://localhost:8123/object/squashkiwi:latest`
- `wget http://localhost:8123/object/4528400792837739857`
- The hash is calculated using `uint64_t hash_file(const std::string &path);` in hash.hpp.
- You can retrieve the hash for a given labvel and tag with, e.g.:
- `curl http://localhost:8123/hash/squashkiwi:latest`
- you can get a full list of {label:tag,hash} entries (one tag per entry) with:
- `curl http://localhost:8123/dir`
- get all metadata for a tag:
- `curl http://localhost:8123/meta/squashkiwi:latest`
- a simple welcome page is served at `/index.html` for those browsing to the site.
- to upload a file (via http put)
- `curl -T object_file http://localhost:8123/WRITE_TOKEN/LABEL:TAG`
- the object_file is uploaded, hashed, added to the registry (if that hash doesn't already exist), and {label:tag,hash} is added to the directory index.
- the server is configured via a configuration file which allows setting:
- the list of write access tokens
- the location for the object store (path on disk)
The C++ program is written so that it only uses standard libraries, and is built as a static executable with musl not glibc.
The C++ program is built with cmake.
A Dockerfile is included for conveniently running the C++ program inside docker.