diff --git a/lib/routes.js b/lib/routes.js
index b0339f9..ac54be7 100644
--- a/lib/routes.js
+++ b/lib/routes.js
@@ -5,6 +5,7 @@ var origFs = require('fs');
 var koaRouter = require('koa-router');
 var bodyParser = require('koa-bodyparser');
 var formParser = require('co-busboy');
+var mime = require('mime-types');
 
 var Tools = require('./tools');
 var FilePath = require('./fileMap').filePath;
@@ -29,6 +30,8 @@ router.get('/api/(.*)', Tools.loadRealPath, Tools.checkPathExists, function *()
   }
   else {
     //this.body = yield fs.createReadStream(p);
+    // C.logger.info(mime.lookup(p));
+    this.type = mime.lookup(p);
     this.body = origFs.createReadStream(p);
   }
 });