kafka

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Author	SHA1	Message	Date
Franz Kafka	7be03b4017	license: change from MIT to AGPLv3 Update LICENSE file and add AGPL header to all source files. AGPLv3 ensures that if someone runs Kafka as a network service and modifies it, they must release their source code under the same license.	2026-03-22 08:27:23 +00:00
Franz Kafka	13040268d6	feat: add global and burst rate limiters Three layers of rate limiting, all disabled by default, opt-in via config: 1. Per-IP (existing): 30 req/min per IP 2. Global: server-wide limit across all IPs - Lock-free atomic counter for minimal overhead - Returns 503 when exceeded - Prevents pool exhaustion from distributed attacks 3. Burst: per-IP burst + sustained windows - Blocks rapid-fire abuse within seconds - Returns 429 with X-RateLimit-Reason header - Example: 5 req/5s burst, 60 req/min sustained Config: [global_rate_limit] requests = 0 # disabled by default window = "1m" [burst_rate_limit] burst = 0 # disabled by default burst_window = "5s" sustained = 0 sustained_window = "1m" Env overrides: GLOBAL_RATE_LIMIT_REQUESTS, GLOBAL_RATE_LIMIT_WINDOW, BURST_RATE_LIMIT_BURST, BURST_RATE_LIMIT_BURST_WINDOW, BURST_RATE_LIMIT_SUSTAINED, BURST_RATE_LIMIT_SUSTAINED_WINDOW Full test coverage: concurrent lock-free test, window expiry, disabled states, IP isolation, burst vs sustained distinction.	2026-03-21 18:35:31 +00:00
Franz Kafka	ebeaeeef21	feat: add CORS and rate limiting middleware CORS: - Configurable allowed origins (wildcard "*" or specific domains) - Handles OPTIONS preflight with configurable methods, headers, max-age - Exposed headers support for browser API access - Env override: CORS_ALLOWED_ORIGINS Rate Limiting: - In-memory per-IP sliding window counter - Configurable request limit and time window - Background goroutine cleans up stale IP entries - HTTP 429 with Retry-After header when exceeded - Extracts real IP from X-Forwarded-For and X-Real-IP (proxy-aware) - Env overrides: RATE_LIMIT_REQUESTS, RATE_LIMIT_WINDOW, RATE_LIMIT_CLEANUP_INTERVAL - Set requests=0 in config to disable Both wired into main.go as middleware chain: rate_limit → cors → handler. Config example updated with [cors] and [rate_limit] sections. Full test coverage for both middleware packages.	2026-03-21 15:54:52 +00:00

Author

SHA1

Message

Date

Franz Kafka

7be03b4017

license: change from MIT to AGPLv3

Update LICENSE file and add AGPL header to all source files.

AGPLv3 ensures that if someone runs Kafka as a network service and
modifies it, they must release their source code under the same license.

2026-03-22 08:27:23 +00:00

Franz Kafka

13040268d6

feat: add global and burst rate limiters

Three layers of rate limiting, all disabled by default, opt-in via config:

1. Per-IP (existing): 30 req/min per IP
2. Global: server-wide limit across all IPs
   - Lock-free atomic counter for minimal overhead
   - Returns 503 when exceeded
   - Prevents pool exhaustion from distributed attacks
3. Burst: per-IP burst + sustained windows
   - Blocks rapid-fire abuse within seconds
   - Returns 429 with X-RateLimit-Reason header
   - Example: 5 req/5s burst, 60 req/min sustained

Config:
[global_rate_limit]
requests = 0  # disabled by default
window = "1m"

[burst_rate_limit]
burst = 0  # disabled by default
burst_window = "5s"
sustained = 0
sustained_window = "1m"

Env overrides: GLOBAL_RATE_LIMIT_REQUESTS, GLOBAL_RATE_LIMIT_WINDOW,
BURST_RATE_LIMIT_BURST, BURST_RATE_LIMIT_BURST_WINDOW,
BURST_RATE_LIMIT_SUSTAINED, BURST_RATE_LIMIT_SUSTAINED_WINDOW

Full test coverage: concurrent lock-free test, window expiry, disabled states,
IP isolation, burst vs sustained distinction.

2026-03-21 18:35:31 +00:00

Franz Kafka

ebeaeeef21

feat: add CORS and rate limiting middleware

CORS:
- Configurable allowed origins (wildcard "*" or specific domains)
- Handles OPTIONS preflight with configurable methods, headers, max-age
- Exposed headers support for browser API access
- Env override: CORS_ALLOWED_ORIGINS

Rate Limiting:
- In-memory per-IP sliding window counter
- Configurable request limit and time window
- Background goroutine cleans up stale IP entries
- HTTP 429 with Retry-After header when exceeded
- Extracts real IP from X-Forwarded-For and X-Real-IP (proxy-aware)
- Env overrides: RATE_LIMIT_REQUESTS, RATE_LIMIT_WINDOW, RATE_LIMIT_CLEANUP_INTERVAL
- Set requests=0 in config to disable

Both wired into main.go as middleware chain: rate_limit → cors → handler.
Config example updated with [cors] and [rate_limit] sections.
Full test coverage for both middleware packages.

2026-03-21 15:54:52 +00:00

3 commits