Fix req.host when using "trust proxy" hops count

History.md

@@ -1,6 +1,7 @@
 3.x
 ===
 
+  * Fix `req.host` when using "trust proxy" hops count
   * Fix `req.protocol`/`req.secure` when using "trust proxy" hops count
 
 3.20.0 / 2015-02-18

lib/request.js

@@ -491,7 +491,7 @@ req.__defineGetter__('host', function(){
   var trust = this.app.get('trust proxy fn');
   var host = this.get('X-Forwarded-Host');
 
-  if (!host || !trust(this.connection.remoteAddress)) {
+  if (!host || !trust(this.connection.remoteAddress, 0)) {
     host = this.get('Host');
   }
 

test/req.host.js

@@ -117,6 +117,24 @@ describe('req', function(){
         .set('Host', 'example.com')
         .expect('example.com', done);
       })
+
+      describe('when trusting hop count', function () {
+        it('should respect X-Forwarded-Host', function (done) {
+          var app = express();
+
+          app.set('trust proxy', 1);
+
+          app.use(function (req, res) {
+            res.end(req.host);
+          });
+
+          request(app)
+          .get('/')
+          .set('Host', 'localhost')
+          .set('X-Forwarded-Host', 'example.com')
+          .expect('example.com', done);
+        })
+      })
     })
 
     describe('when "trust proxy" is disabled', function(){