Adding ability to specify a custom agent for OAuth2Strategy via customHeaders

lib/strategy.js

@@ -108,6 +108,9 @@ function OAuth2Strategy(options, verify) {
   this._trustProxy = options.proxy;
   this._passReqToCallback = options.passReqToCallback;
   this._skipUserProfile = (options.skipUserProfile === undefined) ? false : options.skipUserProfile;
+  if(options.customHeaders && options.customHeaders.agent != undefined){
+    this._oauth2.setAgent(options.customHeaders.agent);
+  }
 }
 
 // Inherit from `passport.Strategy`.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "passport-oauth2",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "OAuth 2.0 authentication strategy for Passport.",
   "keywords": [
     "passport",

test/oauth2.test.js

@@ -21,7 +21,7 @@ describe('OAuth2Strategy', function() {
         expect(strategy.name).to.equal('oauth2');
       });
     }); // with normal options
-    
+
     describe('without a verify callback', function() {
       it('should throw', function() {
         expect(function() {
@@ -452,7 +452,7 @@ describe('OAuth2Strategy', function() {
 
 
   describe('processing response to authorization request', function() {
-    
+
     describe('that was approved without redirect URI', function() {
       var strategy = new OAuth2Strategy({
         authorizationURL: 'https://www.example.com/oauth2/authorize',
@@ -1705,5 +1705,29 @@ describe('OAuth2Strategy', function() {
     }); // processing response to authorization request
 
   }); // using a relative redirect URI
-
+
+  describe('with custom agent in custom headers', function() {
+        var strategy = new OAuth2Strategy({
+          authorizationURL: 'https://www.example.com/oauth2/authorize',
+          tokenURL: 'https://www.example.com/oauth2/token',
+          clientID: 'ABC123',
+          clientSecret: 'secret',
+          callbackURL: '/auth/example/callback',
+          customHeaders: {
+            agent: 'Awesome agent'
+          }
+        },
+        function(accessToken, refreshToken, profile, done) {
+          if (accessToken !== '2YotnFZFEjr1zCsicMWpAA') { return done(new Error('incorrect accessToken argument')); }
+          if (refreshToken !== 'tGzv3JOkF0XG5Qx2TlKWIA') { return done(new Error('incorrect refreshToken argument')); }
+          if (typeof profile !== 'object') { return done(new Error('incorrect profile argument')); }
+          if (Object.keys(profile).length !== 0) { return done(new Error('incorrect profile argument')); }
+
+          return done(null, { id: '1234' }, { message: 'Hello' });
+        });
+
+        it('should set agent in oauth2', function() {
+          expect(strategy._oauth2._agent).to.equal('Awesome agent');
+        });
+    }); 
 });