segment

segment is an unofficial async client for the Segment analytics HTTP API, maintained by the Meilisearch team. It provides strongly typed message builders (Track, Identify, Group, Page, Screen, Alias) together with batching helpers that group events before sending, so you can stream product-analytics data to Segment efficiently from any async Rust service.

What You Get

• A ready-to-use async HttpClient backed by reqwest with rustls or native-tls
• Typed message structs for Track, Identify, Group, Page, Screen and Alias events
• Batcher and AutoBatcher helpers that accumulate and flush events efficiently
• Configurable TLS backends through Cargo feature flags

Common Use Cases

• Streaming product-usage events from a Rust backend to Segment
• Collecting anonymous telemetry from a CLI or server application
• Buffering high-volume analytics events before batched delivery

Under The Hood

Architecture

The crate is organized around a Client trait implemented by HttpClient (http.rs, client.rs), which serializes typed messages from message.rs into Segment’s JSON batch format and POSTs them via reqwest. Batcher (batcher.rs) accumulates messages until the batch size limit is reached, while AutoBatcher (auto_batcher.rs) wraps a client and batcher to flush automatically, and errors.rs centralizes failure modes.

Tech Stack

Written in Rust (edition 2021) with reqwest for HTTP, serde/serde_json for serialization, time for timestamps, async-trait for the client abstraction, and thiserror for error types. TLS backend is selectable via rustls-tls, native-tls, and native-tls-vendored features.

Code Quality

The codebase is small and focused, split into cohesive modules with a clear Client trait boundary. Error handling flows through a dedicated thiserror enum, and the public surface stays minimal. It is a maintained fork used in production by Meilisearch, though the repository carries only light automated test coverage.

API Design

The API mirrors Segment’s official client conventions: build a typed message, push it into an AutoBatcher, and call flush. Defaults such as HttpClient::default keep the getting-started path short, and the message structs use Default so only relevant fields need to be set.