使用Python脚本将绝对url替换为相对url的教程

公司一个项目需要上传图片,一开始同事将图片上传后结合当前主机拼成了一个绝对的URL(http://192.168.1.1:888/m/getimg?filename=xxx.jpg由于同时给手机终端提供接口,在手机终端会引起一些bug,改完代码后要求将以前的uri替换成相对的URL(/m/getimg?filename=xxx.jpg),由于图片是用img标签嵌入到内容同时用a标签括起显示大图的,所以需要读取数据库并对内容进行替换,

脚本内容如下:

#!/usr/bin/env python
#-*- coding:utf-8 -*-
#
#
# author : cold night
# email  : wh_linux@126.com
#

import pymongo
import re
from StringIO import StringIO

conn = pymongo.Connection()
db = conn.test

def replace_url():
  regex = re.compile(r\'([href|src])=[\"|\\\']http://.*?(/m/getimg\\?.*?)[\"|\\\']\')
  results = db[\'test\'].find()
  db_coll = db[\'test\']
  def replace(r):
    content = r.get(\'content\')
    if not content: return
    content = StringIO(content)
    content.seek(0)
    result = StringIO()
    for line in content.readlines():
      t = regex.sub(r\'\\1=\"\\2\"\', line)
      result.write(t)

    result.seek(0)
    content = result.read()
    if content:
      r[\'content\'] = content
    _id = r.get(\'_id\')
    db_coll.update({\'_id\':_id}, r)

  results = [replace(i) for i in results]

if __name__==\"__main__\":replace_url()