fix sync download file bug

library/collection/queue.go

@@ -1,6 +1,7 @@
 package collection
 
 import (
+	"strings"
 	"sync"
 )
 
@@ -34,7 +35,7 @@ func (q *Queue) PushUnique(item interface{}) {
 		q.queueList = []interface{}{}
 	} else {
 		for _, qItem := range q.queueList {
-			if item.(QueueItem).HashCode() == qItem.(QueueItem).HashCode() {
+			if strings.Compare(item.(QueueItem).HashCode(), qItem.(QueueItem).HashCode()) == 0 {
 				return
 			}
 		}
@@ -61,3 +62,40 @@ func (q *Queue) Length() int {
 	defer q.mutex.Unlock()
 	return len(q.queueList)
 }
+
+func (q *Queue) Remove(item interface{}) {
+	q.mutex.Lock()
+	defer q.mutex.Unlock()
+	if q.queueList == nil {
+		q.queueList = []interface{}{}
+	}
+	if len(q.queueList) == 0 {
+		return
+	}
+	j := 0
+	for _, qItem := range q.queueList {
+		if strings.Compare(item.(QueueItem).HashCode(), qItem.(QueueItem).HashCode()) != 0 {
+			q.queueList[j] = qItem
+			j++
+		}
+	}
+	q.queueList = q.queueList[:j]
+	return
+}
+
+func (q *Queue) Contains(item interface{}) bool {
+	q.mutex.Lock()
+	defer q.mutex.Unlock()
+	if q.queueList == nil {
+		q.queueList = []interface{}{}
+	}
+	if len(q.queueList) == 0 {
+		return false
+	}
+	for _, qItem := range q.queueList {
+		if strings.Compare(item.(QueueItem).HashCode(), qItem.(QueueItem).HashCode()) == 0 {
+			return true
+		}
+	}
+	return false
+}

library/collection/queue_test.go

@@ -0,0 +1,24 @@
+package collection
+
+import (
+	"fmt"
+	"testing"
+)
+
+type item struct {
+	Name string
+}
+
+func (i *item) HashCode() string {
+	return i.Name
+}
+
+func TestRemove(t *testing.T) {
+	q := NewFifoQueue()
+	q.Push(&item{Name: "1"})
+	q.Push(&item{Name: "2"})
+	q.Push(&item{Name: "3"})
+	q.Push(&item{Name: "4"})
+	q.Remove(&item{Name: "3"})
+	fmt.Println(q)
+}