Set User: response header if authenticated (for legacy compat)

Author: dmitrizagidulin

lib/api/authn/index.js

@@ -16,7 +16,19 @@ function overrideWith (forceUserId) {
   }
 }
 
+/**
+ * Sets the `User:` response header if the user has been authenticated.
+ */
+function setUserHeader (req, res, next) {
+  let session = req.session
+  let webId = session.identified && session.userId
+
+  res.set('User', webId || '')
+  next()
+}
+
 module.exports = {
   oidc: require('./webid-oidc'),
-  overrideWith
+  overrideWith,
+  setUserHeader
 }

lib/api/authn/webid-oidc.js

@@ -64,4 +64,6 @@ function middleware (oidc) {
   return router
 }
 
-module.exports.middleware = middleware
+module.exports = {
+  middleware
+}

lib/create-app.js

@@ -196,6 +196,8 @@ function initAuthentication (argv, app) {
     default:
       throw new TypeError('Unsupported authentication scheme')
   }
+
+  app.use('/', API.authn.setUserHeader)
 }
 
 /**