| package middlewares | |
| import ( | |
| "github.com/gin-gonic/gin" | |
| ) | |
| func MaxAllowed(n int) gin.HandlerFunc { | |
| sem := make(chan struct{}, n) | |
| acquire := func() { sem <- struct{}{} } | |
| release := func() { <-sem } | |
| return func(c *gin.Context) { | |
| acquire() | |
| defer release() | |
| c.Next() | |
| } | |
| } | |