Allows implicit header param

lib/http-context.js

@@ -134,11 +134,12 @@ HttpContext.prototype.getArgByName = function (name, options) {
     args = {};
   }
 
-  var arg = (args && args[name]) || this.req.param(name);
+  var arg = (args && args[name]) || this.req.param(name) || this.req.get(name);
   // search these in order by name
   // req.params
   // req.body
   // req.query
+  // req.header
 
 
   // coerce simple types in objects

lib/http-invocation.js

@@ -117,6 +117,12 @@ HttpInvocation.prototype.createRequest = function () {
                 query[name] = val;
               }
               break;
+            case 'header':
+              if(val !== undefined) {
+                req.headers = req.headers || {};
+                req.headers[name] = val;
+              }
+              break;
             case 'path':
               // From the url path
               req.url = req.url.replace(':' + name, val);

lib/shared-method.js

@@ -41,6 +41,7 @@ var EventEmitter = require('events').EventEmitter
  * - `form` - `req.body[argumentName]`
  * - `query` - `req.query[argumentName]`
  * - `path` - `req.params[argumentName]`
+ * - `header` - `req.headers[argumentName]`
  * - `context` - the current `HttpContext`
  * @param {Object} [options.accepts.rest] The REST mapping / settings for the
  * argument.

test/rest.test.js

@@ -347,6 +347,32 @@ describe('strong-remoting-rest', function(){
         .expect({ n: 3 }, done);
     });
 
+    it('should allow arguments in the header without http source',
+      function(done) {
+      var method = givenSharedStaticMethod(
+        function bar(a, b, cb) {
+          cb(null, a + b);
+        },
+        {
+          accepts: [
+            { arg: 'b', type: 'number' },
+            { arg: 'a', type: 'number' }
+          ],
+          returns: { arg: 'n', type: 'number' },
+          http: { verb: 'get', path: '/' }
+        }
+      );
+
+      request(app)['get'](method.classUrl)
+        .set('Accept', 'application/json')
+        .set('Content-Type', 'application/json')
+        .set('a', 1)
+        .set('b', 2)
+        .send()
+        .expect('Content-Type', /json/)
+        .expect({ n: 3 }, done);
+    });
+
     it('should allow arguments from http req and res', function(done) {
       var method = givenSharedStaticMethod(
         function bar(req, res, cb) {