Python urlopen of function sample sharing

Well, without further ado, let's look at some examples

One, open a web page to get all the content

from urllib import urlopen
doc = urlopen("http://www.baidu.com").read()
print doc

Get the Http header

from urllib import urlopen
doc = urlopen("http://www.baidu.com")
print doc.info()
print doc.info().getheader('Content-Type')

Use agents

1. Look at the environment variables

print ""n".join(["%s=%s" % (k, v) for k, v in os.environ.items()])
print os.getenv("http_proxy")

2. Set environment variables

import os 
os.putenv("http_proxy", "http://proxyaddr:<port>")

Use an agent

# Use http://www.someproxy.com:3128 for http proxying
proxies = {'http': 'http://www.someproxy.com:3128'}
filehandle = urllib.urlopen(some_url, proxies=proxies)
# Don't use any proxies
filehandle = urllib.urlopen(some_url, proxies={})
# Use proxies from environment - both versions are equivalent
filehandle = urllib.urlopen(some_url, proxies=None)
filehandle = urllib.urlopen(some_url)