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馃┕ Fix limiter middleware db connection #1813

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merged 6 commits into from Mar 15, 2022
Merged

馃┕ Fix limiter middleware db connection #1813

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fdfc8da
remove release() method
kwarabei Mar 7, 2022
b410c27
Revert "remove release() method"
kwarabei Mar 12, 2022
4c1ea42
Rearrange mutexes in limiter_fixed.go
kwarabei Mar 12, 2022
c01ed47
Merge branch 'master' into fix/limiterDBConn
kwarabei Mar 12, 2022
1f2eab4
refactor limiter_fixed.go
kwarabei Mar 14, 2022
0d36570
Update limiter_fixed.go
ReneWerner87 Mar 15, 2022
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14 changes: 6 additions & 8 deletions middleware/limiter/limiter_fixed.go
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Expand Up @@ -44,6 +44,9 @@ func (FixedWindow) New(cfg Config) fiber.Handler {

// Lock entry
mux.Lock()
defer func() {
mux.Unlock()
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this is not a good idea, the mutex in the defer would block the reading for too long

Because with c.Next() all possible handlers are executed

}()

// Get entry from pool and release when finished
e := manager.get(key)
Expand All @@ -69,12 +72,6 @@ func (FixedWindow) New(cfg Config) fiber.Handler {
// Set how many hits we have left
remaining := cfg.Max - e.currHits

// Update storage
manager.set(key, e, cfg.Expiration)
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think moving the set function must also be done in the part where the limit was reached


// Unlock entry
mux.Unlock()

// Check if hits exceed the cfg.Max
if remaining < 0 {
// Return response with Retry-After header
Expand All @@ -92,17 +89,18 @@ func (FixedWindow) New(cfg Config) fiber.Handler {
// Check for SkipFailedRequests and SkipSuccessfulRequests
if (cfg.SkipSuccessfulRequests && c.Response().StatusCode() < fiber.StatusBadRequest) ||
(cfg.SkipFailedRequests && c.Response().StatusCode() >= fiber.StatusBadRequest) {
mux.Lock()
e.currHits--
remaining++
mux.Unlock()
}

// We can continue, update RateLimit headers
c.Set(xRateLimitLimit, max)
c.Set(xRateLimitRemaining, strconv.Itoa(remaining))
c.Set(xRateLimitReset, strconv.FormatUint(resetInSec, 10))

// Update storage
manager.set(key, e, cfg.Expiration)

return err
}
}