python urllib模块学习笔记

这个模块是最基本最常用的，以前看过，总结一下

# coding : utf-8
import urllib

url = 'http://cnblogs.com'

#代理服务器
proxies = {'http':'http://127.0.0.1:8087'}
#使用代理服务器打开
r = urllib.urlopen(url,proxies = proxies)

print r.info()
print r.getcode()
print r.geturl()

#打开本地文件
f = urllib.urlopen(url = 'file:/home/ma6174/a.sh')
print f.read()

#打开ftp
#f = urllib.urlopen(url = 'ftp://username:password@ftpaddress')

#保存网页并显示进度
def cbk(a, b, c):
        '''
        a: num
        b: size
        c: total
        '''
        per = 100.0*a*b/c
        if per > 100:
                per = 100
        print '%.2f%%' % per

local = 'cnblogs.html'
urllib.urlretrieve(url,local,cbk)

#get方法
params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
f = urllib.urlopen("http://www.musi-cal.com/cgi-bin/query?%s" % params)
print f.read()

#post方法
params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
f = urllib.urlopen("http://www.musi-cal.com/cgi-bin/query", params)
print f.read()

#编码解码
data = 'name = ~a+3'  

data1 = urllib.quote(data)   
print data1 # result: name%20%3D%20%7Ea%2B3   
print urllib.unquote(data1) # result: name = ~a+3   
  
data2 = urllib.quote_plus(data)   
print data2 # result: name+%3D+%7Ea%2B3   
print urllib.unquote_plus(data2)    # result: name = ~a+3   
  
data3 = urllib.urlencode({ 'name': 'dark-bull', 'age': 200 })   
print data3 # result: age=200&name=dark-bull   
  
data4 = urllib.pathname2url(r'd:/a/b/c/23.php')   
print data4 # result: ///D|/a/b/c/23.php   
print urllib.url2pathname(data4)    # result: D:/a/b/c/23.php