finally got image ocr works

Gemfile

@@ -82,6 +82,7 @@ gem 'font-awesome-rails', '~> 4.4'
 
 gem "sentry-raven" #, :github => "getsentry/raven-ruby"
 gem "paranoia", "~> 2.0"
+gem 'faraday'
 
 group :development do
   gem 'capistrano'

Gemfile.lock

@@ -421,6 +421,7 @@ DEPENDENCIES
   coffee-rails (~> 4.1.0)
   devise
   devise-bootstrap-views
+  faraday
   font-awesome-rails (~> 4.4)
   groupdate
   houston

app/controllers/api/v1/ocr_controller.rb

@@ -0,0 +1,44 @@
+class Api::V1::OcrController < ApplicationController
+
+  skip_before_action :authenticate_user_from_token
+  BAIDU_KEY = 'a16b7587834498e95bef733ecbfa155d'
+  API_URL = 'http://apis.baidu.com/idl_baidu/baiduocrpay/idlocrpaid'
+
+  def index
+    image_base_str = Base64.strict_encode64(IO.read('/Users/twer/Desktop/1.jpg'))
+    # conn = Faraday.new(:url => API_URL) do |faraday|
+    #   faraday.request :url_encoded
+    #   faraday.request :multipart
+    #   faraday.response :logger
+    #   faraday.adapter Faraday.default_adapter
+    # end
+    # response = conn.post do |req|
+    #   req.url '/idl_baidu/baiduocrpay/idlocrpaid'
+    #   req.headers['apikey'] = BAIDU_KEY
+    #   req.body = {fromdevice: 'pc',
+    #               clientip: '10.10.10.0',
+    #               detecttype: 'LocateRecognize',
+    #               languagetype: 'CHN_ENG',
+    #               imagetype: '2',
+    #               # image: 'http://apistore.baidu.com/idlapi/img_demo_data/ocr/LocateRecognize//62.jpg'
+    #               image: Faraday::UploadIO.new('/Users/twer/Desktop/1.jpg', 'image/jpeg')
+    #   }
+    # end
+    url = 'http://apistore.baidu.com/idlapi/img_demo_data/ocr/LocateRecognize//62.jpg'
+    response = RestClient::Request.execute(method: :post, url: API_URL,
+                                           timeout: 10,
+                                           headers: {apikey: BAIDU_KEY},
+                                           payload:
+                                             {fromdevice: 'pc',
+                                              clientip: '127.0.0.1',
+                                              detecttype: 'LocateRecognize',
+                                              languagetype: 'CHN_ENG',
+                                              imagetype: '1',
+                                              image: image_base_str
+                                             })
+    json = JSON.parse(response.body)
+    ap json
+    render text: json
+  end
+
+end

config/routes.rb

@@ -124,6 +124,7 @@ Rails.application.routes.draw do
         get :most_loved_posts_in_month
       end
 
+      get '/ocr', to: 'ocr#index'
     end
   end
 end