将ha公共变量改为局部变量，避免一个线程出错其他线程无法使用

src/spiderutil/oss.go

@@ -16,7 +16,7 @@ import (
 
 var (
 	ossclient *oss.Client
-	ha        = sha256.New()
+	//ha        = sha256.New()
 
 	ossEndpoint, ossAccessKeyId, ossAccessKeySecret, ossBucketName string
 )
@@ -99,6 +99,7 @@ func demoDownFile(filename string, objectName string) {
 
 func getHashKey(bs []byte) string {
 	util.Catch()
+	ha := sha256.New()
 	ha.Write(bs)
 	hbs := ha.Sum(nil)
 	key := fmt.Sprintf("%x", hbs)