1

httpclimgr.go

@@ -2,6 +2,7 @@ package f5
 
 import (
 	"q5"
+	"sync/atomic"
 )
 
 /*
@@ -23,7 +24,8 @@ type HttpCliRequestHandle interface {
 }
 
 type httpCliRequestHandleImpl struct {
-
+	state int32 //-1: cancel 0:pending 1:started
+	cancelCount int32
 }
 
 type HttpCliResponse interface {
@@ -44,7 +46,10 @@ type httpCliMgr struct {
 }
 
 func (this *httpCliRequestHandleImpl) Cancel() bool {
-	return true
+	ok := atomic.CompareAndSwapInt32(&this.state, 0, -1) ||
+		atomic.CompareAndSwapInt32(&this.state, -1, -1)
+	atomic.AddInt32(&this.cancelCount, 1)
+	return ok
 }
 
 func (this *httpCliMgr) init() {
@@ -138,6 +143,7 @@ func (this *httpCliMgr) internalSendRequest(
 	}
 	handle := &httpCliRequestHandleImpl{}
 	doFunc := func() {
+		if atomic.CompareAndSwapInt32(&handle.state, 0, 1) {
 			data, err := q5.HttpGet(url, params)
 			if cb == nil {
 				return
@@ -153,6 +159,7 @@ func (this *httpCliMgr) internalSendRequest(
 				})
 			}
 		}
+	}
 	go doFunc()
 	return handle
 }