content-type is customizable per route

src/main/scala/Step.scala

@@ -59,12 +59,13 @@ abstract class Step extends HttpServlet
     def isMatchingRoute(route: Route) = {
       def exec(args: Params) = {
         before _
-        response setContentType contentType
 	_request.withValue(request) {
 	  _response.withValue(response) {
 	    _session.withValue(request) {
               paramsMap.withValue(args ++ realParams withDefaultValue(null)) {
-		response.getWriter print route.action()
+		val res = route.action()
+		response setContentType contentType
+		response.getWriter print (res)
               }
 	    }
 	  }

src/test/scala/StepTest.scala

@@ -69,6 +69,16 @@ class TestServlet extends Step {
   get("/print_host") {
     "host:" + request.host + ",port:" + request.port
   }
+
+  get("/content_type/json") {
+    contentType = "application/json; charset=utf-8"
+    """{msg: "test"}"""
+  }
+
+  get("/content_type/html") {
+    contentType = "text/html; charset=utf-8"
+    "test"
+  }
 }
 
 class StepSuite extends FunSuite with ShouldMatchers {
@@ -225,4 +235,24 @@ class StepSuite extends FunSuite with ShouldMatchers {
     response.parse(tester.getResponses(request.generate()))
     response.getContent should equal ("posted_value is null")
   }
+
+  test("content-type test") {
+    request.setMethod("GET")
+    request.setContent("")
+
+    // default is "text/html"
+    request.setURI("/")
+    response.parse(tester.getResponses(request.generate))
+    response.getHeader("Content-Type") should equal ("text/html; charset=utf-8")
+
+    // set content-type to "application/json"
+    request.setURI("/content_type/json")
+    response.parse(tester.getResponses(request.generate))
+    response.getHeader("Content-Type") should equal ("application/json; charset=utf-8")
+
+    // set content-type to "text/html" again
+    request.setURI("/content_type/html")
+    response.parse(tester.getResponses(request.generate))
+    response.getHeader("Content-Type") should equal ("text/html; charset=utf-8")
+  }
 }