refactor url

index.js

@@ -71,7 +71,8 @@ xmpp.on('stanza', async stanza => {
             const buf = await imageGenerator.generateBuffer()
             if (buf.byteLength > 0 && stanza.getChild('slot')
                 && stanza.getChild('slot').getChild('put')) {
-                const req = await got.put(stanza.getChild('slot').getChild('put').attrs.url, {
+                const url = stanza.getChild('slot').getChild('put').attrs.url,
+                    req = await got.put(url, {
                         body: buf
                     }).catch(console.error)
                 if (req && req.url && time) {