new_contents: #!/usr/bin/python
  import os
  import re
  import subprocess
  
  bugIds = []
  def prepareCookieData():
      out = subprocess.call("curl --cookie-jar cookie.data \"https://bugzilla-hostname/index.cgi?Bugzilla_login=name&Bugzilla_password=password&GoAheadAndLogIn=LogIn\" > login.txt", shell=True)        
  
  def gerateBugFile(bugid):
      out = subprocess.call("touch bugsSample/bug_" + str(bugid) + ".txt", shell=True)
      out = subprocess.call("curl --cookie cookie.data \"https://bugzilla-hostname/show_bug.cgi?id=" + str(bugid) + "\" > bugsSample/bug_" + str(bugid) + ".txt ", shell=True)        
  
  def mkdir(path):
      path=path.strip()
      path=path.rstrip("\\")
      isExists=os.path.exists(path)
      if not isExists:
          print path+' created.'
          os.makedirs(path)
          return True
      else:
          print path+' exist!'
          return False
  
  def regxBugId(line):
      m = re.search(r'<\s*a\s.*?href\s*="show_bug\.cgi\?id=[0-9]+', line)
      if m:
          bid= re.search(r'[0-9]+',m.group(0))
          if bid:
              if bid.group(0) not in bugIds:
                  print bid.group(0)
                  gerateBugFile(bid.group(0))
                  bugIds.append(bid.group(0))
                  return True
              else:
                  return False
          else:
              #print "Bug id search error!"
             return False
      else:
          #print "Bug URL search error!"
          return False
  
  def readBugId(path):
      f = open(path)
      line = f.readline()
      count = 0
      while line:
          line = f.readline()
          isOK = regxBugId(line)
          if isOK:
              count += 1   
      f.close()
      print "Total " + str(count) + " bugs have been store!" 
  
  
          
  
  mkpath="bugsSample"
  buglistPath="buglist.txt"
  
  # create directory where bugs situate
  mkdir(mkpath)
  prepareCookieData()
  readBugId(buglistPath)
  
subject: Implement a tool to crawl bug pages.