Thin server and fix rename deletion bug

Author: server

Gemfile

@@ -1,5 +1,6 @@
 source 'https://rubygems.org'
 
+gem 'thin'
 gem 'rails', '4.1.4'
 gem 'sass-rails', '~> 4.0.3'
 gem 'uglifier', '>= 1.3.0'

Gemfile.lock

@@ -71,13 +71,15 @@ GEM
       execjs
     coffee-script-source (1.8.0)
     colorize (0.7.3)
+    daemons (1.1.9)
     devise (3.3.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 3.2.6, < 5)
       thread_safe (~> 0.1)
       warden (~> 1.2.3)
     erubis (2.7.0)
+    eventmachine (1.0.3)
     execjs (2.2.1)
     faraday (0.9.0)
       multipart-post (>= 1.2, < 3)
@@ -185,6 +187,10 @@ GEM
     therubyracer (0.12.1)
       libv8 (~> 3.16.14.0)
       ref
+    thin (1.6.2)
+      daemons (>= 1.0.9)
+      eventmachine (>= 1.0.0)
+      rack (>= 1.0.0)
     thor (0.19.1)
     thread_safe (0.3.4)
     tilt (1.4.1)
@@ -230,6 +236,7 @@ DEPENDENCIES
   slim-rails
   sqlite3
   therubyracer
+  thin
   turbolinks
   uglifier (>= 1.3.0)
   unicorn

app/controllers/api/v1/songs_controller.rb

@@ -31,7 +31,7 @@ def song_params
       pars = pars.permit(:name, :file)
     end
 
-    pars[:file] = params[:file]
+    pars[:file] = params[:file] if params[:file]
     return pars
   end
 end