Rate limiter HTTP

[archit-2003]

Problem

While GoFr supports retries, OAuth, circuit breakers, and health checks for interservice HTTP calls, it lacks built-in rate limiting. This can lead to downstream abuse or noisy-neighbor issues in large distributed systems.

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Goal

Introduce optional rate limiting support in interservice HTTP calls.

• Add a RateLimiterConfig struct as an optional parameter to AddHTTPService.

• Allow configuration of:

  • RequestsPerSecond
  • Burst

• Apply rate limiting per target service.

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Requirements

• Logging: Emit a log when rate limits are triggered.
• OpenTelemetry tracing: Trace rate-limited requests.
• Prometheus metrics: Emit rate-limiting metrics for observability.

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[archit-2003]

I’m currently contributing to this as part of the GoFr Summer of Code 2025. Kindly assign this issue to me. Thank you!

[coolwednesday]

Sure! Assigning this issue. This issue has been picked up once and there has also been an existing issue made prior to this. I will be also linking them for your/other reviewers' reference.

[Umang01-hash]

I am working on this issue and have raised pr #2263 for the same.