support referby display name (#161)

lib/call-session.js

@@ -1146,7 +1146,7 @@ Duration=${payload.duration} `
       // eslint-disable-next-line no-unused-vars
       const { via, from, to, 'call-id': callid, cseq, 'max-forwards': maxforwards,
       // eslint-disable-next-line no-unused-vars
-        'content-length': _contentlength, 'refer-to': _referto, 'referred-by': _referredby,
+        'content-length': _contentlength, 'refer-to': _referto, 'referred-by': referredby,
         // eslint-disable-next-line no-unused-vars
         'X-Refer-To-Leave-Untouched': _leave,
         ...customHeaders
@@ -1158,9 +1158,7 @@ Duration=${payload.duration} `
       const arr = /context-(.*)/.exec(uri.user);
       if (!arr) {
         /* call transfer requested */
-        const referredBy = req.getParsedHeader('Referred-By');
-        if (!referredBy) return res.send(400);
-        const u = parseUri(referredBy.uri);
+        if (!req.has('Referred-By')) return res.send(400);
 
         /* delete contact if it was there from feature server */
         delete customHeaders['contact'];
@@ -1169,7 +1167,7 @@ Duration=${payload.duration} `
           method: 'REFER',
           headers: {
             'Refer-To': `<${stringifyUri(uri)}>`,
-            'Referred-By': `<${stringifyUri(u)}>`,
+            'Referred-By': referredby,
             ...customHeaders
           }
         });