Fixing authentication cancel with null/undefined credentials.

atom/browser/api/atom_api_url_request.cc

@@ -305,8 +305,7 @@ void URLRequest::OnAuthenticationRequired(
     return;
   }
 
-  EmitRequestEvent(
+  Emit("login", auth_info.get(),
-      false, "login", auth_info.get(),
        base::Bind(&AtomURLRequest::PassLoginInformation, atom_request_));
 }
 

lib/browser/api/net.js

@@ -192,6 +192,25 @@ class ClientRequest extends EventEmitter {
       this.emit('response', response)
     })
 
+    urlRequest.on('login', (event, authInfo, callback) => {
+      this.emit('login', authInfo, (username, password) => {
+        // If null or undefined usrename/password, force to empty string.
+        if (username === null || username === undefined) {
+          username = ''
+        }
+        if (typeof username !== 'string') {
+          throw new Error('username must be a string')
+        }
+        if (password === null || password === undefined) {
+          password = ''
+        }
+        if (typeof password !== 'string') {
+          throw new Error('password must be a string')
+        }
+        callback(username, password)
+      })
+    })
+
     if (callback) {
       this.once('response', callback)
     }