Use CasperJS in Python to get a tutorial on HTML content generated by JS rendering

In fact, casperjs has no direct relationship with python, and mainly relies on casperjs to call phantomjs webkit to get html file contents. For a long time, it has been extremely difficult for crawlers to grab the html pages generated by the client javascript rendering. Java has HtmlUnit in it, while Python allows us to use a separate, cross-platform CasperJS.

      create site.js (interface file, input :url, output :html file)    

   //USAGE: E:\toolkit\n1k0-casperjs-e3a77d0\bin>python casperjs site.js --url=http://spys.ru/free-proxy-list/IE/ --outputfile='temp.html' 
     
    var fs = require('fs'); 
    var casper = require('casper').create({ 
     pageSettings: { 
     loadImages: false,     
     loadPlugins: false,    
     userAgent: 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.137 Safari/537.36 LBBROWSER' 
    }, 
    logLevel: "debug",// The log level  
    verbose: true  //  Log to the console  
     }); 
    var url = casper.cli.raw.get('url'); 
    var outputfile = casper.cli.raw.get('outputfile'); 
    // The requested page  
    casper.start(url, function () { 
    fs.write(outputfile, this.getHTML(), 'w'); 
    }); 
     
    casper.run(); 

      python code, checkout_proxy.py            

 import json 
    import sys 
    #import requests 
    #import requests.utils, pickle 
    from bs4 import BeautifulSoup 
    import os.path,os 
    import threading 
    #from multiprocessing import Process, Manager 
    from datetime import datetime 
    import traceback 
    import logging 
    import re,random 
    import subprocess 
    import shutil 
    import platform 
      
     
     
     
    output_file = os.path.join(os.path.dirname(os.path.realpath(__file__)),'proxy.txt') 
    global_log = 'http_proxy' + datetime.now().strftime('%Y-%m-%d') + '.log' 
    if not os.path.exists(os.path.join(os.path.dirname(os.path.realpath(__file__)),'logs')): 
      os.mkdir(os.path.join(os.path.dirname(os.path.realpath(__file__)),'logs')) 
    global_log = os.path.join(os.path.dirname(os.path.realpath(__file__)),'logs',global_log) 
     
    logging.basicConfig(level=logging.DEBUG,format='[%(asctime)s] [%(levelname)s] [%(module)s] [%(funcName)s] [%(lineno)d] %(message)s',filename=global_log,filemode='a') 
    log = logging.getLogger(__name__)  
    #manager = Manager() 
    #PROXY_LIST = manager.list() 
    mutex = threading.Lock() 
    PROXY_LIST = [] 
     
     
    def isWindows(): 
      if "Windows" in str(platform.uname()): 
      return True 
      else: 
      return False 
     
     
    def getTagsByAttrs(tagName,pageContent,attrName,attrRegValue): 
      soup = BeautifulSoup(pageContent)                                                 
      return soup.find_all(tagName, { attrName : re.compile(attrRegValue) }) 
     
     
    def getTagsByAttrsExt(tagName,filename,attrName,attrRegValue): 
      if os.path.isfile(filename): 
      f = open(filename,'r')    
      soup = BeautifulSoup(f) 
      f.close() 
      return soup.find_all(tagName, { attrName : re.compile(attrRegValue) }) 
      else: 
      return None 
     
     
    class Site1Thread(threading.Thread): 
      def __init__(self,outputFilePath): 
        threading.Thread.__init__(self) 
      self.outputFilePath = outputFilePath 
      self.fileName = str(random.randint(100,1000)) + ".html" 
      self.setName('Site1Thread') 
      
      def run(self): 
      site1_file = os.path.join(os.path.dirname(os.path.realpath(__file__)),'site.js') 
      site2_file = os.path.join(self.outputFilePath,'site.js') 
      if not os.path.isfile(site2_file) and os.path.isfile(site1_file): 
        shutil.copy(site1_file,site2_file) 
      #proc = subprocess.Popen(["bash","-c", "cd %s && ./casperjs site.js --url=http://spys.ru/free-proxy-list/IE/ --outputfile=%s" % (self.outputFilePath,self.fileName) ],stdout=subprocess.PIPE) 
      if isWindows(): 
        proc = subprocess.Popen(["cmd","/c", "%s/casperjs site.js --url=http://spys.ru/free-proxy-list/IE/ --outputfile=%s" % (self.outputFilePath,self.fileName) ],stdout=subprocess.PIPE) 
      else: 
        proc = subprocess.Popen(["bash","-c", "cd %s && ./casperjs site.js --url=http://spys.ru/free-proxy-list/IE/ --outputfile=%s" % (self.outputFilePath,self.fileName) ],stdout=subprocess.PIPE) 
      out=proc.communicate()[0] 
      htmlFileName = '' 
      # Because the output path is windows I'm not sure, so I've added all the possible paths  
      if os.path.isfile(self.fileName): 
        htmlFileName = self.fileName 
      elif os.path.isfile(os.path.join(self.outputFilePath,self.fileName)): 
        htmlFileName = os.path.join(self.outputFilePath,self.fileName) 
      elif os.path.isfile(os.path.join(os.path.dirname(os.path.realpath(__file__)),self.fileName)): 
        htmlFileName = os.path.join(os.path.dirname(os.path.realpath(__file__)),self.fileName)  
      if (not os.path.isfile(htmlFileName)): 
        print 'Failed to get html content from http://spys.ru/free-proxy-list/IE/' 
        print out 
        sys.exit(3)  
      mutex.acquire() 
      PROXYList= getTagsByAttrsExt('font',htmlFileName,'class','spy14$') 
      for proxy in PROXYList: 
        tdContent = proxy.renderContents() 
        lineElems = re.split('[<>]',tdContent) 
        if re.compile(r'\d+').search(lineElems[-1]) and re.compile('(\d+\.\d+\.\d+)').search(lineElems[0]): 
        print lineElems[0],lineElems[-1] 
        PROXY_LIST.append("%s:%s" % (lineElems[0],lineElems[-1])) 
      mutex.release() 
      try: 
        if os.path.isfile(htmlFileName): 
        os.remove(htmlFileName) 
      except: 
        pass 
     
    if __name__ == '__main__': 
      try: 
      if(len(sys.argv)) < 2: 
        print "Usage:%s [casperjs path]" % (sys.argv[0]) 
        sys.exit(1)  
      if not os.path.exists(sys.argv[1]): 
        print "casperjs path: %s does not exist!" % (sys.argv[1]) 
        sys.exit(2)  
      if os.path.isfile(output_file): 
        f = open(output_file) 
        lines = f.readlines() 
        f.close 
        for line in lines: 
        PROXY_LIST.append(line.strip()) 
      thread1 = Site1Thread(sys.argv[1]) 
      thread1.start() 
      thread1.join() 
       
      f = open(output_file,'w') 
      for proxy in set(PROXY_LIST): 
        f.write(proxy+"\n") 
      f.close() 
      print "Done!" 
      except SystemExit: 
      pass 
      except: 
        errMsg = traceback.format_exc() 
        print errMsg 
        log.error(errMsg)