add mime type if image is sent directly

lib/plan-tasks.js

@@ -6,6 +6,7 @@ var mkdirp = require("mkdirp");
 var gm = require("gm");
 var manipulationMethods = require("./manipulation-methods");
 var Queue = require("./process-queue");
+var mime = require("mime");
 
 var planTasks = function (preset) {
     var tasks = preset.tasks;
@@ -24,6 +25,11 @@ var planTasks = function (preset) {
         return path.join(preset.basePath, req.path);
     };
 
+    var setType = function (file, res) {
+        var type = mime.lookup(file);
+        res.header("Content-type", type);
+    };
+
     var resizeFile = function (file, req, res, cb) {
         var rs = fs.createReadStream(file);
         var image = gm(rs);
@@ -32,6 +38,8 @@ var planTasks = function (preset) {
             manipulationMethods(task.type, task.options, image);
         });
 
+        setType(file, res);
+
         image.stream(function (err, stdout, stderr) {
             if (err) {
                 console.error(err);

package.json

@@ -19,7 +19,8 @@
     "gm" : "1.8.x",
     "mkdirp" : "0.3.x",
     "express" : "3.1.x",
-    "async" : "0.2.x"
+    "async" : "0.2.x",
+    "mime" : "1.2.x"
   },
   "devDependencies": {
     "mocha" : "1.8.x",

test/integration-test.js

@@ -251,4 +251,20 @@ describe("resizer", function () {
             .expect(200, cleanup(__dirname + "/test-out-images/profile.png", cb));
     });
 
+    it("should return the correct mime type", function (done) {
+        var app = express();
+
+        var resizer = new Resizer();
+        resizer.attach("name")
+            .publicDir(__dirname)
+            .from("/test-images")
+            .to("/test-out-images");
+        app.use(resizer.app);
+        app.use(express.static(__dirname + "/test-images"));
+        request(app)
+            .get("/test-out-images/profile.png")
+            .expect("Content-type", "image/png")
+            .expect(200, done);
+    });
+
 });