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Ruby on Rails

Video Upload

The following code example illustrates how to handle video upload on your server using Ruby as a server-side language. For step by step explanation of the upload flow see video upload concept.


The main index page.

<!DOCTYPE html>
  <meta charset="utf-8">

  <!-- Include external CSS. -->
  <link href="" rel="stylesheet" type="text/css" />
  <link rel="stylesheet" href="">

  <!-- Include Editor style. -->
  <link href="[email protected]/css/froala_editor.pkgd.min.css" rel="stylesheet" type="text/css" />
  <link href="[email protected]/css/froala_style.min.css" rel="stylesheet" type="text/css" />

  <!-- Include external JS libs. -->
  <script type="text/javascript" src=""></script>
  <script type="text/javascript" src=""></script>
  <script type="text/javascript" src=""></script>

  <!-- Include Editor JS files. -->
  <script type="text/javascript" src="[email protected]//js/froala_editor.pkgd.min.js"></script>
  <div class="sample">
    <h2>Video upload example.</h2>
      <textarea id="edit" name="content"></textarea>

  <!-- Initialize the editor. -->
    $(function() {
        // Set the video upload URL.
        videoUploadURL: '/upload_video',

        videoUploadParams: {
          id: 'my_editor'


upload_controller.rb file will manage the upload part. It has basic video format validations this can be easily extended.

The uploads directory will be automatically created if it dose not exist under public/uploads/files

After processing the uploaded video, if it passes the validation, the server will respond with a JSON object containing a link to the uploaded file.

E.g.: {"link":"http://server_address/download_file/name_of_file"}.

class UploadController < ActionController::Base

  VIDEO_EXT = [".mp4", ".webm", ".ogg"]

  def upload_video
    if params[:file]

      ext = File.extname(params[:file].original_filename)
      ext = video_validation(ext)
      file_name = "#{SecureRandom.urlsafe_base64}#{ext}"
      path = Rails.root.join("public/uploads/files/", file_name), "wb") {|f| f.write(params[:file].read)}
      view_file = Rails.root.join("/download_file/", file_name).to_s
      render :json => {:link => view_file}.to_json

      render :text => {:link => nil}.to_json

  def video_validation(ext)
    raise "Not allowed" unless VIDEO_EXT.include?(ext)

  def access_file
    if File.exists?(Rails.root.join("public", "uploads", "files", params[:name]))
      send_data"public", "uploads", "files", params[:name])), :disposition => "attachment"
      render :nothing => true

routes.rb file will manage the routing part.

Inside this file you need to define the routes for the POST video upload and the GET uploaded video requests

Rails.application.routes.draw do
# For details on the DSL available within this file, see

post "/upload_video" => "upload#upload_video", :as => :upload_video
get "/download_file/:name" => "upload#access_file", :as => :upload_access_file, :name => /.*/