Implementation of extracting token from signed cookies

lib/extract_jwt.js

@@ -72,6 +72,17 @@ extractors.fromAuthHeaderAsBearerToken = function () {
 };
 
 
+extractors.fromSignedCookie = function (cookie_name) {
+    return function (request) {
+        var token = null;
+        if (request.signedCookies && request.signedCookies[cookie_name]) {
+            token = request.signedCookies[cookie_name];
+        }
+        return token;
+    }
+};
+
+
 extractors.fromExtractors = function(extractors) {
     if (!Array.isArray(extractors)) {
         throw new TypeError('extractors.fromExtractors expects an array')

test/extractors-test.js

@@ -156,6 +156,39 @@ describe('Token extractor', function() {
         });
 
 
+    });
+
+    describe('fromSignedCookie', function() {
+
+        var extractor = extract_jwt.fromSignedCookie('token');
+
+        it('should return the value from signed cookie', function() {
+            var req = new Request()
+            req.signedCookies['token'] = 'abcd123';
+
+            var token = extractor(req);
+
+            expect(token).to.equal('abcd123');
+        });
+
+        it('should return null if no signed cookie is present', function() {
+            var req = new Request()
+
+            var token = extractor(req);
+
+            expect(token).to.equal.null;
+        });
+
+        it('should return null if specified cookie name not present but other signed cookies are', function() {
+            var req = new Request()
+            req.signedCookies['othertoken'] = 'abcd123';
+
+            var token = extractor(req);
+
+            expect(token).to.equal.null;
+        });
+
+
     });
 
     describe('fromExtractors', function() {

test/mock_request.js

@@ -5,6 +5,7 @@ function Request() {
     this.method = 'GET';
     this.url = '/';
     this.headers = {};
+    this.signedCookies = {};
 }
 
 module.exports = Request;