54 lines
867 B
Go
54 lines
867 B
Go
package middleware
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import (
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"github.com/gin-gonic/gin"
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"net/http"
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"sync"
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"sync/atomic"
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)
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type IpLimitMap struct {
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mux *sync.Mutex
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m map[string]*int64
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limitNum int64
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}
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func IpLimit(num int64) func(ctx *gin.Context) {
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m := IpLimitMap{
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mux: &sync.Mutex{},
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m: make(map[string]*int64),
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limitNum: num,
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}
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return func(c *gin.Context) {
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ip := c.ClientIP()
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s := false
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defer func() {
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i, ok := m.m[ip]
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if ok && s && *i > 0 {
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//time.Sleep(time.Second * 3)
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atomic.AddInt64(i, -1)
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if *i == 0 {
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m.mux.Lock()
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delete(m.m, ip)
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m.mux.Unlock()
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}
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}
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}()
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i, ok := m.m[ip]
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if !ok {
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m.mux.Lock()
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i = new(int64)
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m.m[ip] = i
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m.mux.Unlock()
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}
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if m.limitNum > 0 && *i >= m.limitNum {
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c.Status(http.StatusForbidden)
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c.Abort()
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return
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}
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s = true
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atomic.AddInt64(i, 1)
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}
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}
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