I was trying to crawl this page using python-requests library
import requests
from lxml import etree,html
url = 'http://www.amazon.in/b/ref=sa_menu_mobile_elec_all?ie=UTF8&node=976419031'
r = requests.get(url)
tree = etree.HTML(r.text)
print tree
but I got above error. (TooManyRedirects)
I tried to use allow_redirects parameter but same error
r = requests.get(url, allow_redirects=True)
I even tried to send headers and data alongwith url but I'm not sure if this is correct way to do it.
headers = {'content-type': 'text/html'}
payload = {'ie':'UTF8','node':'976419031'}
r = requests.post(url,data=payload,headers=headers,allow_redirects=True)
how to resolve this error. I've even tried beautiful-soup4 out of curiosity and I got different but same kind of error
page = BeautifulSoup(urllib2.urlopen(url))
urllib2.HTTPError: HTTP Error 301: The HTTP server returned a redirect error that would lead to an infinite loop.
The last 30x error message was:
Moved Permanently
Amazon is redirecting your request to http://www.amazon.in/b?ie=UTF8&node=976419031, which in turn redirects to http://www.amazon.in/electronics/b?ie=UTF8&node=976419031, after which you have entered a loop:
>>> loc = url
>>> seen = set()
>>> while True:
... r = requests.get(loc, allow_redirects=False)
... loc = r.headers['location']
... if loc in seen: break
... seen.add(loc)
... print loc
...
http://www.amazon.in/b?ie=UTF8&node=976419031
http://www.amazon.in/electronics/b?ie=UTF8&node=976419031
>>> loc
http://www.amazon.in/b?ie=UTF8&node=976419031
So your original URL A redirects no a new URL B, which redirects to C, which redirects to B, etc.
Apparently Amazon does this based on the User-Agent header, at which point it sets a cookie that following requests should send back. The following works:
>>> s = requests.Session()
>>> s.headers['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.131 Safari/537.36'
>>> r = s.get(url)
>>> r
<Response [200]>
This created a session (for ease of re-use and for cookie persistence), and a copy of the Chrome user agent string. The request succeeds (returns a 200 response).