Python Scraping Web with Session Cookie

Question

Hi iam trying to scrap some data off from this URL:

http://www.21cineplex.com/nowplaying/jakarta,3,JKT.htm/1

As you may have noticed, if cookies and session data is not yet set you will be redirected to its base url (http://www.21cineplex.com/)

I tried to do it like this:

def main():
    try:
        cj = CookieJar()
        baseurl = "http://www.21cineplex.com"
        opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
        opener.open(baseurl)

        urllib2.install_opener(opener)
        movieSource = urllib2.urlopen('http://www.21cineplex.com/nowplaying/jakarta,3,JKT.htm/1').read()

        splitSource = re.findall(r'<ul class="w462">(.*?)</ul>', movieSource)

        print splitSource

    except Exception, e:
        str(e)
        print "Error occured in main Block"

However, i ended up failing to scrap from that particular URL.

A quick inspection reveals that the website is setting a session ID (PHPSESSID) and make a copy to the client's cookie as such.

The question is how do i mitigate such example?

ps: i've tried to install request (via pip) how ever it gives me (404):

  Getting page https://pypi.python.org/simple/request/
  Could not fetch URL https://pypi.python.org/simple/request/: HTTP Error 404: Not Found (request does not have any releases)
  Will skip URL https://pypi.python.org/simple/request/ when looking for download links for request
  Getting page https://pypi.python.org/simple/
  URLs to search for versions for request:
  * https://pypi.python.org/simple/request/
  Getting page https://pypi.python.org/simple/request/
  Could not fetch URL https://pypi.python.org/simple/request/: HTTP Error 404: Not Found (request does not have any releases)
  Will skip URL https://pypi.python.org/simple/request/ when looking for download links for request
  Could not find any downloads that satisfy the requirement request

Cleaning up...

Jeremy · Accepted Answer · 2013-09-20 02:47:11Z

3

Thanks to @Chainik i got it to work now. I ended up modify my code like this:

cj = CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
baseurl = "http://www.21cineplex.com/"
regex = '<ul class="w462">(.*?)</ul>'

opener.open(baseurl)
urllib2.install_opener(opener)

request = urllib2.Request('http://www.21cineplex.com/nowplaying/jakarta,3,JKT.htm/1')
request.add_header('Referer', baseurl)

requestData = urllib2.urlopen(request)
htmlText = requestData.read()

Once, the html text is retrieved. It's all about parsing its content.

Cheers

answered Sep 20, 2013 at 2:47

Jeremy

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Community · Accepted Answer · 2017-05-23 12:15:16Z

0

Try setting a referer URL, see below.

Without referer URL set (302 redirect):

$ curl -I "http://www.21cineplex.com/nowplaying/jakarta,3,JKT.htm/1"
HTTP/1.1 302 Moved Temporarily                       
Server: nginx
Date: Thu, 19 Sep 2013 09:19:19 GMT
Content-Type: text/html
Connection: keep-alive
X-Powered-By: PHP/5.4.17
Set-Cookie: PHPSESSID=5effe043db4fd83b2c5927818cb1a7ca; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: kota=3; expires=Fri, 19-Sep-2014 09:19:19 GMT; path=/
Location: http://www.21cineplex.com/

With referer URL set (HTTP/200):

$ curl -I -e "http://www.21cineplex.com/"
"http://www.21cineplex.com/nowplaying/jakarta,3,JKT.htm/1"
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 19 Sep 2013 09:19:24 GMT
Content-Type: text/html
Connection: keep-alive
Vary: Accept-Encoding
X-Powered-By: PHP/5.4.17
Set-Cookie: PHPSESSID=a7abd6592c87e0c1a8fab4f855baa0a4; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: kota=3; expires=Fri, 19-Sep-2014 09:19:24 GMT; path=/

To set referer URL using urllib, see this post

-- ab1

edited May 23, 2017 at 12:15

CommunityBot

11 silver badge

answered Sep 19, 2013 at 9:26

ab77

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1 Comment

Jeremy Over a year ago

Hi thx, theoretically this should works. But i am not sure about the expiration thing. Anyway, i'll let you know.

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