Ruby on Rails server file upload

Recently looked at Ruby on rails and tried to integrate dynamic WEB Twain into Ruby on Rails. Here's how to do file uploads in rails with a few lines of code.

Reference original: How to Load, Scan and Upload Files with Ruby on Rails

Desmond Shaw

Translation: Yushulx

Software Installation

• Dynamic Web TWAIN 11.1

• Ruby 2.1.7

• Ruby Development Kit

Don't choose Ruby 2.2 on Windows, or you'll get an error when running Rails server:

Nokogiri not supported, details can be read https://github.com/sparklemotion/nokogiri/issues/1256.

Basic steps for Rails to create a project

1. Installing rails:

   Gem Install Rails

2. To create an app:

   Rails New DWT

3. CD to DWT

4. Start the service

   Rails Server

5. Visit http://localhost:3000
   

Rails integrated Dynamic WEB Twain upload file

Create a Controller

Rails Generate controller Twainscanning Home

Copy the < Dynamic Web TWAIN directory >\resources to < Rails Project >\public\resources.

Open < Rails Project >\app\views\twainscanning\home.html.erb Add the following code:

  
Open < Rails Project >\app\controller\application_controler.rb commented out:
 
Class Applicationcontroller < Actioncontroller::base # Prevent CSRF attacks by raising an exception.  # for APIs, the want to use:null_session instead. #protect_from_forgery with:: Exceptionend
  
Open < Rails Project >\config\routes.rb Add mappings:
 
Rails.application.routes.draw do get ' twainscanning/home ' root ' twainscanning#home ' post ' upload/' = ' twainscanning #upload ' End
  
 Open  < Rails Project >\app\controller\twainscanning_controller.rb  Add File Upload code: 
 
 
class twainscanningcontroller <  applicationcontroller  def home  end   def upload     uploaded_io = params[:RemoteFile]     upload_dir =  Rails.root.join (' Public ',  ' upload ')     unless dir.exist? (Upload_dir)       dir.mkdir (upload_dir)     end      file.open (Rails.root.join (' Public ',  ' upload ',  uploaded_io.original_filename),   ' WB ')  do |file|      file.write (uploaded_io.read)      end     respond_to do |format|       format.html.any { render text:  "successfully uploaded!"}     end   endend 
  
To run the service:
 
 Source
 
Https://github.com/dynamsoftsamples/dwt-ruby-on-rails
 

Ruby on Rails server file upload