update vendor

vendor/github.com/qiniu/api.v7/cdn/anti_leech.go

@@ -0,0 +1,35 @@
+package cdn
+
+import (
+	"crypto/md5"
+	"fmt"
+	"net/url"
+	"time"
+)
+
+// CreateTimestampAntileechURL 构建带时间戳防盗链的链接
+// encryptKey 七牛防盗链key
+func CreateTimestampAntileechURL(urlStr string, encryptKey string, durationInSeconds int64) (antileechURL string, err error) {
+
+	u, err := url.Parse(urlStr)
+	if err != nil {
+		return
+	}
+
+	expireTime := time.Now().Add(time.Second * time.Duration(durationInSeconds)).Unix()
+	toSignStr := fmt.Sprintf("%s%s%x", encryptKey, u.EscapedPath(), expireTime)
+	signedStr := fmt.Sprintf("%x", md5.Sum([]byte(toSignStr)))
+
+	q := url.Values{}
+	q.Add("sign", signedStr)
+	q.Add("t", fmt.Sprintf("%x", expireTime))
+
+	if u.RawQuery == "" {
+		antileechURL = u.String() + "?" + q.Encode()
+	} else {
+
+		antileechURL = u.String() + "&" + q.Encode()
+	}
+
+	return
+}