Implementing Golang request rate limiting and queuing | by Kerstan | December 2024

Subscribed to: https://medium.com/@kerstan

Hello everyone, my name is Kerstan.

TToday, let’s talk about a common problem that programmers often encounter: when calling third-party APIs, they frequently encounter access rate limiting.

For example, you vigorously send requests, only to encounter an HTTP 429 error stating “Too many requests”, making you seem like a lowly programmer who can’t keep up with the pace of the API.

How to resolve this situation? Today, we’ll explore a common and effective solution: request rate limiting and queuing.

Undoubtedly, developers, especially back-end developers, often need to rely on various external APIs. Whether retrieving weather information, accessing payment interface data, or using a third-party verification service, API calls play an important role in our work.

However, frequent calls to third-party APIs may impose certain restrictions on each developer, such as limiting the number of requests per second or per day.

When the request frequency is too high, you may encounter an HTTP error 429, indicating “Too many requests.” This is a disastrous mistake because it means…