crawl from web

Gemfile

@@ -28,6 +28,7 @@ gem 'draper'
 gem 'rsolr'
 gem 'rsolr-ext'
 gem 'pry'
+gem 'nokogiri'
 # Use Redis adapter to run Action Cable in production
 # gem 'redis', '~> 4.0'
 # Use Active Model has_secure_password

Gemfile.lock

@@ -320,6 +320,7 @@ DEPENDENCIES
   kaminari
   listen (>= 3.0.5, < 3.2)
   mysql2 (>= 0.4.4)
+  nokogiri
   pry
   puma (~> 3.11)
   rails (~> 6.0.0)

app/decorators/job_decorator.rb

@@ -14,7 +14,7 @@ class JobDecorator < ApplicationDecorator
   end
 
   def display_short_des
-    simple_format object.short_des&.truncate(250)
+    simple_format object.requirement&.truncate(250)
   end
 
   def display_description

app/services/crawl_data.rb

+require "nokogiri"
+require "open-uri"
+
+class CrawlData
+  def initialize
+
+  end
+
+  def crawl_web
+    page = Nokogiri::HTML.parse(open(Settings.crawl.base_url))
+    total_job = page.css("div.ais-stats h1.col-sm-10 span").text.gsub(",", "").to_f
+    total_page = (total_job / 50).floor
+    fixed_total_page = 20
+
+    (1..fixed_total_page).each do |each_page|
+      page = Nokogiri::HTML.parse(open(URI.encode("https://careerbuilder.vn/viec-lam/tat-ca-viec-lam-trang-#{each_page}-vi.html")))
+      (0..49).each do |j|
+        job_url = page.css("span.jobtitle h3 a @href")[j].text
+
+        job_page = Nokogiri::HTML.parse(open(URI.encode(job_url)))
+        # Job code
+        job_code = job_url.split("/").last.split(".")[-2]
+
+        next if job_page.css("div.LeftJobCB").nil?
+
+        # Job title
+        job_title = job_page.css("div.top-job-info h1").text.strip
+        # Job post date
+        job_post_date = job_page.css("div.datepost span").text
+
+        job_workplace, job_salary, job_position, job_expiration_date, job_industries, job_level = ""
+        detail_job_new = job_page.css("ul.DetailJobNew li p")
+
+        (0..detail_job_new.count - 1).each do |detail_part|
+          detail = detail_job_new[detail_part].text
+          if detail.include?("Nơi làm việc")
+            job_workplace = detail.gsub("/[\r\n]+/", "").partition(":").last.split(",")
+          elsif detail.include?("Lương")
+            job_salary = detail.gsub("/[\r\n]+/", "").partition(":").last.strip
+          elsif detail.include?("Cấp bậc")
+            job_level = detail.gsub("/[\r\n]+/", "").partition(":").last.strip
+          elsif detail.include?("Hết hạn nộp")
+            job_expiration_date = detail.gsub("/[\r\n]+/", "").partition(":").last.strip
+          elsif detail.include?("Ngành nghề")
+            job_industries = detail.gsub("/[\r\n]+/", "").partition(":").last.split(",")
+          end
+        end
+
+        job_description, job_requirement = ""
+        job_container_detail = job_page.css("div.MarBot20")
+
+        (0..job_container_detail.count - 1).each do |detail_part|
+          detail = job_container_detail[detail_part].text
+          if detail.include?("Mô tả Công việc")
+            job_description = detail.partition("Mô tả Công việc").last
+          elsif detail.include?("Yêu Cầu Công Việc")
+            job_requirement = detail.partition("Yêu Cầu Công Việc").last
+          end
+        end
+
+        company_name, company_email, company_address, company_desc, company_code = ""
+        # Company full name
+        unless job_page.css("div.tit_company").nil?
+          company_name = job_page.css("div.tit_company").text.strip
+        end
+        # Company code
+        company_code = job_url.split("/").last.split("-").last.split(".")[-2].strip
+
+        # Company address
+        unless job_page.css("p.TitleDetailNew label")[0].nil?
+          company_address = job_page.css("p.TitleDetailNew label")[0].text.strip
+        end
+        # Company description
+        company_desc = job_page.css("span#emp_more p").text.strip
+
+        job_workplace.each do |city_name|
+          city_id = city_id(city_name)
+          company_id = company_id(company_code, company_name, company_address, company_desc)
+          job_id = job_id(job_code, job_title, job_salary,
+                          job_description, job_requirement,
+                          job_level, job_post_date,
+                          job_expiration_date, company_id)
+          CityJob.find_or_create_by!(job_id: job_id, city_id: city_id)
+
+          job_industries.each do |job_industry|
+            industry_id = industry_id(job_industry.strip)
+            IndustryJob.find_or_create_by!(industry_id: industry_id, job_id: job_id)
+          end
+        end
+      end
+    end
+  end
+
+  def company_id(code, name, address, description)
+    company = Company.find_or_initialize_by(code: code)
+    company.update(name: name, address: address, description: description)
+    company.id
+  end
+
+  def industry_id(name)
+    industry = Industry.find_or_create_by!(name: name)
+    industry.id
+  end
+
+  def city_id(name)
+    name = name.strip
+    City.find_or_create_by(name: city_name, region: "Việt Nam").id
+  end
+
+  def job_id(code = nil, title, salary, description, requirement, level, post_date, expiration_date, company_id)
+    if expiration_date.nil?
+      job = Job.find_or_initialize_by(title: job_title, company_id: company_id)
+    else
+      job = Job.find_or_initialize_by(code: code)
+    end
+
+    job.update(code: code,
+               title: title,
+               salary: salary,
+               post_date: post_date,
+               description: description,
+               requirement: requirement,
+               expiration_date: expiration_date,
+               level: level,
+               company_id: company_id)
+    job.id
+  end
+end

app/services/job_crawl.rb

+class JobCrawl
+  def initialize(attr)
+    @attr = attr
+  end
+
+  def title
+    @title ||= job_title
+  end
+
+  def level
+    @level ||= job_level
+  end
+
+  def salary
+    @salary ||= job_salary
+  end
+
+  def description
+    @description ||= job_description
+  end
+
+  def post_date
+    @post_date ||= job_post_date
+  end
+
+  def requirement
+    @requirement ||= job_requirement
+  end
+
+  def expiration_date
+    @job_expiration_date ||= job_expiration_date
+  end
+
+  def code
+    @code ||= job_code
+  end
+
+  def company_id
+    @company_id ||= company.id
+  end
+
+  def company
+    @company ||= Company.find_by(code: company_code) ||
+                 Company.create(name: company_name, address: company_address,
+                                email: company_mail, code: company_code, description: company_desc)
+  end
+
+  def crawl_attributes
+    {code: job_code,
+     name: job_name,
+     salary: job_salary,
+     post_date: job_post_date,
+     description: job_description,
+     requirement: job_requirement,
+     expiration_date: job_expiration_date,
+     level: job_level,
+     company_id: company_id}
+  end
+end

config/application.rb

 require_relative 'boot'
+require 'openssl'
 
 require 'rails/all'
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
+OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE
 Bundler.require(*Rails.groups)
 
 module Venjob

config/settings.yml

@@ -17,3 +17,6 @@ solr:
     retry_503: 1
     retry_after_limit: 1
     server_url: "http://localhost:8983/solr/venjob"
+
+crawl:
+  base_url: "https://careerbuilder.vn/viec-lam/tat-ca-viec-lam-vi.html"

lib/tasks/task.rake

@@ -25,3 +25,13 @@ namespace :solr do
     solr_delete_logger.info "Solr delete all data succesfully at #{Time.current}"
   end
 end
+
+namespace :crawl do
+  desc "crawl data from careerbuilder.vn"
+  task crawl_data: :environment do
+    CrawlData.new.crawl_web
+
+    # crawl = ActiveSupport::Logger.new("log/crawl_data.log")
+    # crawl.info "Crawl data from careerbuilder.vn succesfully at #{Time.current}"
+  end
+end