This is an optimized version of the classify client endpoint in Normandy.

This is a normal Cargo project, so after cloning the repository, you can build and run it with

$ cargo build
$ cargo run

This project should run on the latest stable version of Rust. Unstable features are not allowed.

A GeoIP database will need to be provided. By default it is expected to be found at ./GeoLite2-Country.mmdb.

Via environment variables:

• DEBUG: Set to "true" to enable extra debugging options, such as a /debug endpoint that shows internal server state (default: "false").
• GEOIP_DB_PATH: path to GeoIP database (default: "./GeoLite2-Country.mmdb")
• HOST: host to bind to (default: "localhost")
• HUMAN_LOGS: set to "true" to use human readable logging (default: MozLog as JSON)
• METRICS_TARGET: The host and port to send statsd metrics to. May be a hostname like "metrics.example.com:8125" or an IP like "127.0.0.1:8125". Port is required. (default: "localhost:8125")
• PORT: port number to bind to (default: "8000")
• SENTRY_DSN: report errors to a Sentry instance (default: "")
• TRUSTED_PROXY_LIST: A comma-separated list of CIDR ranges that trusted proxies will be in. Supports both IPv4 and IPv6.
• VERSION_FILE: path to version.json file (default: "./version.json")

Tests can be run with Cargo as well

$ cargo test

Linting is handled via Therapist. After installing it, enable the git hooks using either therapist install or therapist install --fix. The --fix variant will automatically format your code upon commit. The variant without --fix will simply show an error and ask you to reformat the code using other means before committing. Therapist runs in CI.

The checks Therapist runs are:

• Rustfmt
• Clippy, using the clippy::all preset