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Merge pull request #12 from AAStarCommunity/chao/feature/rate-limit-b…
…y-apikey feat: rate limit
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| Original file line number | Diff line number | Diff line change |
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@@ -25,4 +25,6 @@ go.work | |
| build/ | ||
| config/*.json | ||
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| vendor | ||
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| conf/appsettings.*.yaml | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,50 @@ | ||
| package middlewares | ||
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| import ( | ||
| "AAStarCommunity/EthPaymaster_BackService/rpc_server/api/utils" | ||
| "errors" | ||
| "github.com/gin-gonic/gin" | ||
| "golang.org/x/time/rate" | ||
| "net/http" | ||
| ) | ||
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| const ( | ||
| DefaultLimit rate.Limit = 50 // limit `DefaultLimit` requests per second | ||
| DefaultBurst int = 50 // burst size, for surge traffic | ||
| ) | ||
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| var limiter map[string]*rate.Limiter | ||
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| // RateLimiterByApiKey represents the rate limit by each ApiKey for each api calling | ||
| func RateLimiterByApiKey() gin.HandlerFunc { | ||
| return func(ctx *gin.Context) { | ||
| if exists, current := utils.CurrentUser(ctx); exists { | ||
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| if limiting(¤t) { | ||
| ctx.Next() | ||
| } else { | ||
| _ = ctx.AbortWithError(http.StatusTooManyRequests, errors.New("too many requests")) | ||
| } | ||
| } else { | ||
| _ = ctx.AbortWithError(http.StatusUnauthorized, errors.New("401 Unauthorized")) | ||
| } | ||
| } | ||
| } | ||
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| func limiting(apiKey *string) bool { | ||
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| var l *rate.Limiter | ||
| if limit, ok := limiter[*apiKey]; ok { | ||
| l = limit | ||
| } else { | ||
| // TODO: different rate config for each current(apiKey) should get from dashboard service | ||
| l = rate.NewLimiter(DefaultLimit, DefaultBurst) | ||
| limiter[*apiKey] = l | ||
| } | ||
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| return l.Allow() | ||
| } | ||
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| func init() { | ||
| limiter = make(map[string]*rate.Limiter, 100) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,43 @@ | ||
| package middlewares | ||
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| import ( | ||
| "github.com/stretchr/testify/assert" | ||
| "os" | ||
| "testing" | ||
| "time" | ||
| ) | ||
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| func TestRateLimitShouldPreventRequestWhenOverDefaultLimit(t *testing.T) { | ||
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| mockApiKey := "TestingAipKey" | ||
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| // assuming this for loop taking less than 1 second to finish | ||
| for i := 0; i < int(DefaultLimit)+5; i++ { | ||
| b := limiting(&mockApiKey) | ||
| if i < int(DefaultLimit) { | ||
| assert.Equal(t, true, b) | ||
| } else { | ||
| assert.Equal(t, false, b) | ||
| } | ||
| } | ||
| } | ||
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| func TestRateLimiterShouldAllowDefaultLimitPerSecond(t *testing.T) { | ||
| if os.Getenv("GITHUB_ACTIONS") != "" { | ||
| t.Skip() | ||
| return | ||
| } | ||
| mockApiKey := "TestingAipKey" | ||
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| for x := 1; x <= 2; x++ { | ||
| for i := 0; i < int(DefaultLimit)+5; i++ { | ||
| b := limiting(&mockApiKey) | ||
| if i < int(DefaultLimit) { | ||
| assert.Equal(t, true, b) | ||
| } else { | ||
| assert.Equal(t, false, b) | ||
| } | ||
| } | ||
| time.Sleep(time.Second * 2) | ||
| } | ||
| } |
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