Use Python to replace an absolute URL with a relative URL

This article describes how to replace an absolute URL with a relative URL in Python. it involves Python string operations and regular expression matching techniques, for more information about how to replace an absolute URL with a relative URL, see the example in this article. Share it with you for your reference. The specific analysis is as follows:

I. problems:

A company project needs to upload images. at first, after uploading images, a colleague combined the current host into an absolute URL (http: // 192.168.1.1: 888/m/getimg? Filename=xxx.jpg) because an interface is provided to the mobile phone terminal at the same time, some bugs may occur in the mobile phone token. after the code is changed, replace the previous uri with the relative URL (/m/getimg? Filename=xxx.jpg). because the image is embedded with the img label and the label is used to enclose the large image, you need to read the database and replace the content.

II. solution:

#!/usr/bin/env python#-*- coding:utf-8 -*-### author : cold night# email  : wh_linux@126.com#import pymongoimport refrom StringIO import StringIOconn = pymongo.Connection()db = conn.testdef 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()

I hope this article will help you with Python programming.