chrly/CHANGELOG.md

# Changelog
All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased] - xxxx-xx-xx
### Added
- Mojang textures queue now can be completely disabled via `MOJANG_TEXTURES_ENABLED` param.
- Remote mode for Mojang's textures queue with a new configuration params: `MOJANG_TEXTURES_UUIDS_PROVIDER_DRIVER` and
  `MOJANG_TEXTURES_UUIDS_PROVIDER_URL`.

  For example, to send requests directly to [Mojang's APIs](https://wiki.vg/Mojang_API#Username_-.3E_UUID_at_time),
  set the next configuration:
  - `MOJANG_TEXTURES_UUIDS_PROVIDER_DRIVER=remote`
  - `MOJANG_TEXTURES_UUIDS_PROVIDER_URL=https://api.mojang.com/users/profiles/minecraft/`
- Implemented worker mode. The app starts with the only one API endpoint: `/api/worker/mojang-uuid/{username}`,
  which is compatible with [Mojang's endpoint](https://wiki.vg/Mojang_API#Username_-.3E_UUID_at_time) to exchange
  username to its UUID. It can be used with some load balancing software to increase throughput of Mojang's textures
  proxy by splitting the load across multiple servers with its own IPs.
- Textures extra param is now can be configured via `TEXTURES_EXTRA_PARAM_NAME` and `TEXTURES_EXTRA_PARAM_VALUE`.
- New StatsD metrics:
  - Counters:
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.textures_hit`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.textures_miss`
- All incoming requests are now logging to the console in
  [Apache Common Log Format](http://httpd.apache.org/docs/2.2/logs.html#common).
- Added `/healthcheck` endpoint (at the moment checks are only available for the batch Mojang UUIDs provider).
- Graceful server shutdown.

### Fixed
- `ely.skinsystem.{hostname}.app.mojang_textures.usernames.iteration_size` and
  `ely.skinsystem.{hostname}.app.mojang_textures.usernames.queue_size` are now updates even if the queue is empty.

### Changed
- **BREAKING**: `QUEUE_LOOP_DELAY` param is now sets as a Go duration, not milliseconds.
  For example, default value is now `2s500ms`.
- **BREAKING**: Event `ely.skinsystem.{hostname}.app.mojang_textures.already_in_queue` has been renamed into
  `ely.skinsystem.{hostname}.app.mojang_textures.already_scheduled`.
- Bumped Go version to 1.14.

### Removed
- **BREAKING**: `ely.skinsystem.{hostname}.app.mojang_textures.invalid_username` counter has been removed.

## [4.3.0] - 2019-11-08
### Added
- 403 Forbidden errors from the Mojang's API are now logged.
- `QUEUE_LOOP_DELAY` configuration param to adjust Mojang's textures queue performance.

### Changed
- Mojang's textures queue loop is now has an iteration delay of 2.5 seconds (was 1).
- Bumped Go version to 1.13.

## [4.2.3] - 2019-10-03
### Changed
- Mojang's textures queue batch size [reduced to 10](https://wiki.vg/index.php?title=Mojang_API&type=revision&diff=14964&oldid=14954).
- 400 BadRequest errors from the Mojang's API are now logged.

## [4.2.2] - 2019-06-19
### Fixed
- GC for in-memory textures cache has not been initialized.

## [4.2.1] - 2019-05-06
### Changed
- Improved Keep-Alive settings for HTTP client used to perform requests to Mojang's APIs.
- Mojang's textures queue now has static delay of 1 second after each iteration to prevent strange `429` errors.
- Mojang's textures queue now caches even errored responses for signed textures to avoid `429` errors.
- Mojang's textures queue now caches textures data for 70 seconds to avoid strange `429` errors.
- Mojang's textures queue now doesn't log timeout errors.

### Fixed
- Panic when Redis connection is broken.
- Duplication of Redis connections pool for Mojang's textures queue.
- Removed validation rules for `hash` field.

## [4.2.0] - 2019-05-02
### Added
- `CHANGELOG.md` file.
- [#1](https://github.com/elyby/chrly/issues/1): Restored Mojang skins proxy.
- New StatsD metrics:
  - Counters:
    - `ely.skinsystem.{hostname}.app.mojang_textures.invalid_username`
    - `ely.skinsystem.{hostname}.app.mojang_textures.request`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.cache_hit_nil`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.queued`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.cache_hit`
    - `ely.skinsystem.{hostname}.app.mojang_textures.already_in_queue`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.uuid_miss`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.uuid_hit`
    - `ely.skinsystem.{hostname}.app.mojang_textures.textures.cache_hit`
    - `ely.skinsystem.{hostname}.app.mojang_textures.textures.request`
  - Gauges:
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.iteration_size`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.queue_size`
  - Timers:
    - `ely.skinsystem.{hostname}.app.mojang_textures.result_time`
    - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.round_time`
    - `ely.skinsystem.{hostname}.app.mojang_textures.textures.request_time`

### Changed
- Bumped Go version to 1.12.
- Bumped Alpine version to 3.9.3.

### Fixed
- `/textures` request no longer proxies request to Mojang in a case when there is no information about the skin,
  but there is a cape.
- [#5](https://github.com/elyby/chrly/issues/5): Return Redis connection to the pool after commands are executed

### Removed
- `hash` field from `/textures` response because the game doesn't use it and calculates hash by getting the filename
  from the textures link instead.
- `hash` field from `POST /api/skins` endpoint.

[Unreleased]: https://github.com/elyby/chrly/compare/4.3.0...HEAD
[4.3.0]: https://github.com/elyby/chrly/compare/4.2.3...4.3.0
[4.2.3]: https://github.com/elyby/chrly/compare/4.2.2...4.2.3
[4.2.2]: https://github.com/elyby/chrly/compare/4.2.1...4.2.2
[4.2.1]: https://github.com/elyby/chrly/compare/4.2.0...4.2.1
[4.2.0]: https://github.com/elyby/chrly/compare/4.1.1...4.2.0