获取html页面的编码
来源： 作者：zhaoweikid 发布时间：2007-07-04 阅读次数：
html页面一般都会指定一个编码，如何获取到是处理html页面的第一步，因为错误的编码必然带来后面处理的问题。这里我用python的正则表达式写了个：
import re
a = ["<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />",
'<meta http-equiv=Content-Type content="text/html;charset=gb2312">',
'<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">',
'<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />',
'<meta http-equiv="content-type" content="text/html; charset=utf-8" />',
'<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />',
'<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />'
]
b = "<meta[ ]+http-equiv=["']?content-type["']?[ ]+content=["']?text/html;[ ]*charset=([0-9-a-zA-Z]+)["']?"
B = re.compile(b, re.IGNORECASE)
for ax in a:
r1 = B.search(ax)
if r1:
print r1.group()
print r1.group(1), len(r1.group())
else:
print 'not match'
import rea = ["<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />", '<meta http-equiv=Content-Type content="text/html;charset=gb2312">', '<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">', '<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />', '<meta http-equiv="content-type" content="text/html; charset=utf-8" />', '<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />', '<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />' ]b = "<meta[ ]+http-equiv=["']?content-type["']?[ ]+content=["']?text/html;[ ]*charset=([0-9-a-zA-Z]+)["']?"B = re.compile(b, re.IGNORECASE)for ax in a: r1 = B.search(ax) if r1: print r1.group() print r1.group(1), len(r1.group()) else: print 'not match'