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Detailed description of 403 access forbidden error in python crawler
Detailed description of 403 access forbidden error in python crawler
This article mainly introduces relevant information about the detailed explanation of 403 access forbidden error in python crawler. Friends in need can refer to it
Python crawler solves 403 access forbidden error
When writing a crawler in Python, html.getcode() will encounter the problem of 403 forbidden access. This is a ban on automated crawlers by the website. To solve this problem, you need to use the python module urllib2 module
urllib2 module is an advanced crawler crawling module. There are many methods. For example, if you connect url=http://blog.csdn.NET/qysh123, there may be a 403 access forbidden problem for this connection.
To solve this problem, the following steps are required:
<span style="font-size:18px;">req = urllib2.Request(url)
req.add_header("User-Agent","Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36")
req.add_header("GET",url)
req.add_header("Host","blog.csdn.net")
req.add_header("Referer","http://blog.csdn.net/")</span>Among them, User-Agent is a browser-specific attribute, By viewing the source code through the browser, you can see
and then
html=urllib2.urlopen(req) print html.read()
to download all the web page code without the problem of 403 forbidden access. .
For the above problems, it can be encapsulated into a function for future call convenience. The specific code is:
##
#-*-coding:utf-8-*-
import urllib2
import random
url="http://blog.csdn.net/qysh123/article/details/44564943"
my_headers=["Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36",
"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.75.14 (KHTML, like Gecko) Version/7.0.3 Safari/537.75.14",
"Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Win64; x64; Trident/6.0)"
]
def get_content(url,headers):
'''''
@获取403禁止访问的网页
'''
randdom_header=random.choice(headers)
req=urllib2.Request(url)
req.add_header("User-Agent",randdom_header)
req.add_header("Host","blog.csdn.net")
req.add_header("Referer","http://blog.csdn.net/")
req.add_header("GET",url)
content=urllib2.urlopen(req).read()
return content
print get_content(url,my_headers)The above is the detailed content of Detailed description of 403 access forbidden error in python crawler. For more information, please follow other related articles on the PHP Chinese website!
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