欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Python实现破解12306图片验证码的方法分析

程序员文章站 2022-05-03 09:37:06
本文实例讲述了Python实现破解12306图片验证码的方法。分享给大家供大家参考,具体如下: 不知从何时起,12306的登录验证码竟然变成了按字找图,可以说是又提高了一...

本文实例讲述了Python实现破解12306图片验证码的方法。分享给大家供大家参考,具体如下:

不知从何时起,12306的登录验证码竟然变成了按字找图,可以说是又提高了一个等次,竟然把图像识别都用上了。不过有些图片,不得不说有些变态,图片的清晰图就更别说了,明显是从网络上的图库中搬过来的。

Python实现破解12306图片验证码的方法分析

谁知没多久,网络就惊现破解12306图片验证码的Python代码了,作为一个爱玩爱刺激的网虫,当然要分享一份过来。

代码大致流程:

1、将验证码图片下载下来,然后切图;
2、利用百度识图进行图片分析;
3、再利用正则表达式来取出百度识图的关键字,最后输出。

代码:

#!/usr/bin/python
# # FileName  : fuck12306.py
# # Author   : MaoMao Wang <andelf@gmail.com>
# # Created   : Mon Mar 16 22:08:41 2015 by ShuYu Wang
# # Copyright  : Feather (c) 2015
# # Description : fuck fuck 12306
# # Time-stamp: <2015-03-17 10:57:44 andelf>
from PIL import Image
from PIL import ImageFilter
import urllib
import urllib2
import re
import json
# hack CERTIFICATE_VERIFY_FAILED
# https://github.com/mtschirs/quizduellapi/issues/2
import ssl
if hasattr(ssl, '_create_unverified_context'):
  ssl._create_default_https_context = ssl._create_unverified_context
UA = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.89 Safari/537.36"
pic_url = "https://kyfw.12306.cn/otn/passcodeNew/getPassCodeNew?module=login&rand=sjrand&0.21191171556711197"
def get_img():
  resp = urllib.urlopen(pic_url)
  raw = resp.read()
  with open("./tmp.jpg", 'wb') as fp:
    fp.write(raw)
  return Image.open("./tmp.jpg")
def get_sub_img(im, x, y):
  assert 0 <= x <= 3
  assert 0 <= y <= 2
  WITH = HEIGHT = 68
  left = 5 + (67 + 5) * x
  top = 41 + (67 + 5) * y
  right = left + 67
  bottom = top + 67
  return im.crop((left, top, right, bottom))
def baidu_stu_lookup(im):
  url = "http://stu.baidu.com/n/image?fr=html5&needRawImageUrl=true&id=WU_FILE_0&name=233.png&type=image%2Fpng&lastModifiedDate=Mon+Mar+16+2015+20%3A49%3A11+GMT%2B0800+(CST)&size="
  im.save("./query_temp_img.png")
  raw = open("./query_temp_img.png", 'rb').read()
  url = url + str(len(raw))
  req = urllib2.Request(url, raw, {'Content-Type':'image/png', 'User-Agent':UA})
  resp = urllib2.urlopen(req)
  resp_url = resp.read()   # return a pure url
  url = "http://stu.baidu.com/n/searchpc?queryImageUrl=" + urllib.quote(resp_url)
  req = urllib2.Request(url, headers={'User-Agent':UA})
  resp = urllib2.urlopen(req)
  html = resp.read()
  return baidu_stu_html_extract(html)
def baidu_stu_html_extract(html):
  #pattern = re.compile(r'<script type="text/javascript">(.*?)</script>', re.DOTALL | re.MULTILINE)
  pattern = re.compile(r"keywords:'(.*?)'")
  matches = pattern.findall(html)
  if not matches:
    return '[UNKNOWN]'
  json_str = matches[0]
  json_str = json_str.replace('\\x22', '"').replace('\\\\', '\\')
  #print json_str
  result = [item['keyword'] for item in json.loads(json_str)]
  return '|'.join(result) if result else '[UNKNOWN]'
def ocr_question_extract(im):
  # git@github.com:madmaze/pytesseract.git
  global pytesseract
  try:
    import pytesseract
  except:
    print "[ERROR] pytesseract not installed"
    return
  im = im.crop((127, 3, 260, 22))
  im = pre_ocr_processing(im)
  # im.show()
  return pytesseract.image_to_string(im, lang='chi_sim').strip()
def pre_ocr_processing(im):
  im = im.convert("RGB")
  width, height = im.size
  white = im.filter(ImageFilter.BLUR).filter(ImageFilter.MaxFilter(23))
  grey = im.convert('L')
  impix = im.load()
  whitepix = white.load()
  greypix = grey.load()
  for y in range(height):
    for x in range(width):
      greypix[x,y] = min(255, max(255 + impix[x,y][0] - whitepix[x,y][0],
                    255 + impix[x,y][1] - whitepix[x,y][1],
                    255 + impix[x,y][2] - whitepix[x,y][2]))
  new_im = grey.copy()
  binarize(new_im, 150)
  return new_im
def binarize(im, thresh=120):
  assert 0 < thresh < 255
  assert im.mode == 'L'
  w, h = im.size
  for y in xrange(0, h):
    for x in xrange(0, w):
      if im.getpixel((x,y)) < thresh:
        im.putpixel((x,y), 0)
      else:
        im.putpixel((x,y), 255)
if __name__ == '__main__':
  im = get_img()
  #im = Image.open("./tmp.jpg")
  print 'OCR Question:', ocr_question_extract(im)
  for y in range(2):
    for x in range(4):
      im2 = get_sub_img(im, x, y)
      result = baidu_stu_lookup(im2)
      print (y,x), result

PS:这里再为大家提供2款非常方便的正则表达式工具供大家参考使用:

JavaScript正则表达式在线测试工具:
http://tools.jb51.net/regex/javascript

正则表达式在线生成工具:
http://tools.jb51.net/regex/create_reg

更多关于Python相关内容可查看本站专题:《Python正则表达式用法总结》、《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总

希望本文所述对大家Python程序设计有所帮助。