objectstore-client 0.1.4

Client SDK for Objectstore, the Sentry object storage platform

Objectstore Client

The client is used to interface with the Objectstore backend. It handles responsibilities like transparent compression, and making sure that uploads and downloads are done as efficiently as possible.

Quick Start

from objectstore_client import Client, Usecase

client = Client("http://localhost:8888")
session = client.session(Usecase("attachments"), org=42, project=1337)

# Upload
key = session.put(b"Hello, world!")

# Download
result = session.get(key)
content = result.payload.read()

# Delete
session.delete(key)

Core Concepts

Usecases and Scopes

A Usecase represents a server-side namespace with its own configuration defaults. Within a Usecase, Scopes provide further isolation — typically keyed by organization and project IDs. A Session ties a Client to a specific Usecase + Scope for operations.

Scope components form a hierarchical path, so their order matters: org=42/project=1337 and project=1337/org=42 are different scopes. We recommend using org and project as the first two components.

# Scope with org and project (recommended first components)
session = client.session(Usecase("attachments"), org=42, project=1337)

# Additional components are appended after org/project
session = client.session(Usecase("attachments"), org=42, project=1337, app_slug="email_app")

Expiration

Objects can expire automatically using Time To Live (from creation) or Time To Idle (from last access). Defaults are set at the Usecase level and can be overridden per-upload. Without an expiration policy, objects use manual expiration (no auto-deletion).

We strongly recommend setting an expiration policy on every Usecase to prevent unbounded storage growth. Choose TimeToIdle for cache-like data that should stay alive while actively used, or TimeToLive for data with a fixed retention period.

from datetime import timedelta
from objectstore_client import Usecase, TimeToIdle, TimeToLive

# Set default expiration on the Usecase
usecase = Usecase("attachments", expiration_policy=TimeToIdle(timedelta(days=30)))

# Override per-upload
session.put(b"payload", expiration_policy=TimeToLive(timedelta(hours=1)))

Origin Tracking

We encourage setting the origin on every upload to track where the payload was originally obtained from (e.g., the IP address of the Sentry SDK or CLI). This is optional but helps with auditing and debugging.

session.put(b"payload", origin="203.0.113.42")

Compression

Uploads are compressed with Zstd by default. Downloads are transparently decompressed. You can override compression per-upload for pre-compressed or uncompressible data.

session.put(already_compressed_data, compression="none")

Custom Metadata

Arbitrary key-value pairs can be attached to objects and retrieved on download.

session.put(b"payload", metadata={"source": "upload-service"})

Authentication

If your Objectstore instance enforces authorization, you must configure authentication via the token parameter on Client. It accepts either:

• A TokenGenerator — for internal services that have access to an EdDSA keypair. The generator signs a fresh JWT for each request, scoped to the specific usecase and scope being accessed.
• A str — a pre-signed JWT, used as-is for every request. Use this for external services that receive a token from another source.

from objectstore_client import Client, Usecase
from objectstore_client.auth import TokenGenerator

# Option 1: Internal service with a keypair
client = Client(
    "http://localhost:8888",
    token=TokenGenerator(kid="my-service", secret_key="<private key>"),
)

# Option 2: External service with a pre-signed JWT
# Use TokenGenerator.sign_for_scope() to obtain a static token from an
# internal service, then pass it to the external consumer:
from objectstore_client.scope import Scope

token = TokenGenerator(
    kid="my-service", secret_key="<private key>",
).sign_for_scope("my_app", Scope(org=42, project=1337))

client = Client("http://localhost:8888", token=token)

Configuration

In production, store the Client and Usecase at module level and reuse them. The following shows all available constructor options with their defaults:

from objectstore_client import Client, Usecase

client = Client(
    "http://localhost:8888",
    propagate_traces=False,  # default
    retries=3,               # default: 3 connect retries, no read retries
    timeout_ms=None,         # default: no read timeout (connect: 100ms)
    connection_kwargs={},    # default: empty (override urllib3.HTTPConnectionPool kwargs)
    # metrics_backend=...,   # default: no-op
    # token=...,             # see Authentication section
)

attachments = Usecase("attachments")

See the docstrings on Client, Usecase, and Session for full parameter documentation.

Development

Environment Setup

The considerations for setting up the development environment that can be found in the main README apply for this package as well.

Pre-commit hook

A configuration to set up a git pre-commit hook using pre-commit is available at the root of the repository.

To install it, run

pre-commit install

The hook will automatically run some checks before every commit, including the linters and formatters we run in CI.