fix header only / status only requests for express api

Author: Matt Mason

src/WebJobs.Script/Content/Script/http/response.js

@@ -4,6 +4,7 @@
 module.exports = (context) => {
     var res = {
         headers: {},
+        body: undefined,
 
         end: (body) => {
             if (body !== undefined) {

test/WebJobs.Script.Tests/NodeEndToEndTests.cs

@@ -476,6 +476,27 @@ public async Task HttpTriggerExpressApi_Get()
             Assert.Equal("Test Request Header", reqHeaders["test-header"]);
         }
 
+        [Fact]
+        public async Task HttpTriggerExpressApi_SendStatus()
+        {
+            HttpRequestMessage request = new HttpRequestMessage
+            {
+                RequestUri = new Uri(string.Format("http://localhost/api/httptrigger")),
+                Method = HttpMethod.Get
+            };
+            request.SetConfiguration(new HttpConfiguration());
+            request.Headers.Add("scenario", "sendStatus");
+
+            Dictionary<string, object> arguments = new Dictionary<string, object>
+            {
+                { "request", request }
+            };
+            await Fixture.Host.CallAsync("HttpTriggerExpressApi", arguments);
+
+            HttpResponseMessage response = (HttpResponseMessage)request.Properties[ScriptConstants.AzureFunctionsHttpResponseKey];
+            Assert.Equal(HttpStatusCode.BadRequest, response.StatusCode);
+        }
+
         [Fact]
         public async Task HttpTriggerPromise_TestBinding()
         {

test/WebJobs.Script.Tests/TestScripts/Node/HttpTriggerExpressApi/index.js

@@ -3,17 +3,27 @@
 module.exports = function (context, req) {
     context.log('Node.js HttpTrigger function invoked.');
 
-    context.res.status(200)
-        .set('test-req-header', context.req.get('test-header'))
-        .set('test-header', 'Test Response Header')
-        .type('application/json; charset=utf-8')
-        .send({
-            reqBodyType: typeof req.body,
-            reqBodyIsArray: util.isArray(req.body),
-            reqBody: req.body,
-            reqRawBodyType: typeof req.rawBody,
-            reqRawBody: req.rawBody,
-            reqHeaders: req.headers,
-            bindingData: context.bindingData
-        });
+    switch (req.headers.scenario) {
+        case 'sendStatus':
+            context.res.sendStatus(400);
+            break;
+
+        default: 
+            context.res.status(200)
+                .set('test-req-header', context.req.get('test-header'))
+                .set('test-header', 'Test Response Header')
+                .type('application/json; charset=utf-8')
+                .send({
+                    reqBodyType: typeof req.body,
+                    reqBodyIsArray: util.isArray(req.body),
+                    reqBody: req.body,
+                    reqRawBodyType: typeof req.rawBody,
+                    reqRawBody: req.rawBody,
+                    reqHeaders: req.headers,
+                    bindingData: context.bindingData
+                });
+            break;
+    }
+
+    
 }