Re: n00b with urllib2: How to make it handle cookie automatically?
On Feb 25, 5:46 am, 7stud <[EMAIL PROTECTED]> wrote:
> On Feb 24, 4:41 am, est <[EMAIL PROTECTED]> wrote:
>
>
>
>
>
> > On Feb 23, 2:42 am, Rob Wolfe <[EMAIL PROTECTED]> wrote:
>
> > > est <[EMAIL PROTECTED]> writes:
> > > > Hi all,
>
> > > > I need urllib2 do perform series of HTTP requests with cookie from
> > > > PREVIOUS request(like our browsers usually do ). Many people suggest I
> > > > use some library(e.g. pycURL) instead but I guess it's good practise
> > > > for a python beginner to DIY something rather than use existing tools.
>
> > > > So my problem is how to expand the urllib2 class
>
> > > > from cookielib import CookieJar
> > > > class SmartRequest():
> > > > cj=CookieJar()
> > > > def __init__(self, strUrl, strContent=None):
> > > > self.Request = urllib2.Request(strUrl, strContent)
> > > > self.cj.add_cookie_header(self.Request)
> > > > self.Response = urllib2.urlopen(Request)
> > > > self.cj.extract_cookies(self.Response, self.Request)
> > > > def url
> > > > def read(self, intCount):
> > > > return self.Response.read(intCount)
> > > > def headers(self, strHeaderName):
> > > > return self.Response.headers[strHeaderName]
>
> > > > The code does not work because each time SmartRequest is initiated,
> > > > object 'cj' is cleared. How to avoid that?
> > > > The only stupid solution I figured out is use a global CookieJar
> > > > object. Is there anyway that could handle all this INSIDE the class?
>
> > > > I am totally new to OOP & python programming, so could anyone give me
> > > > some suggestions? Thanks in advance
>
> > > Google for urllib2.HTTPCookieProcessor.
>
> > > HTH,
> > > Rob- Hide quoted text -
>
> > > - Show quoted text -
>
> > Wow, thank you Rob Wolfe! Your reply is shortest yet most helpful! I
> > solved this problem by the following code.
>
> > class HTTPRefererProcessor(urllib2.BaseHandler):
> > """Add Referer header to requests.
>
> > This only makes sense if you use each RefererProcessor for a
> > single
> > chain of requests only (so, for example, if you use a single
> > HTTPRefererProcessor to fetch a series of URLs extracted from a
> > single
> > page, this will break).
>
> > There's a proper implementation of this in module mechanize.
>
> > """
> > def __init__(self):
> > self.referer = None
>
> > def http_request(self, request):
> > if ((self.referer is not None) and
> > not request.has_header("Referer")):
> > request.add_unredirected_header("Referer", self.referer)
> > return request
>
> > def http_response(self, request, response):
> > self.referer = response.geturl()
> > return response
>
> > https_request = http_request
> > https_response = http_response
>
> > def main():
> > cj = CookieJar()
> > opener = urllib2.build_opener(
> > urllib2.HTTPCookieProcessor(cj),
> > HTTPRefererProcessor(),
> > )
> > urllib2.install_opener(opener)
>
> > urllib2.urlopen(url1)
> > urllib2.urlopen(url2)
>
> > if "__main__" == __name__:
> > main()
>
> > And it's working great!
>
> > Once again, thanks everyone!
>
> How does the class HTTPReferrerProcessor do anything useful for you?- Hide
> quoted text -
>
> - Show quoted text -
Well, it's more browser-like. Many be I should have snipped
HTTPReferrerProcessor code for this discussion.
--
http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
On Feb 24, 4:41 am, est <[EMAIL PROTECTED]> wrote:
> On Feb 23, 2:42 am, Rob Wolfe <[EMAIL PROTECTED]> wrote:
>
>
>
> > est <[EMAIL PROTECTED]> writes:
> > > Hi all,
>
> > > I need urllib2 do perform series of HTTP requests with cookie from
> > > PREVIOUS request(like our browsers usually do ). Many people suggest I
> > > use some library(e.g. pycURL) instead but I guess it's good practise
> > > for a python beginner to DIY something rather than use existing tools.
>
> > > So my problem is how to expand the urllib2 class
>
> > > from cookielib import CookieJar
> > > class SmartRequest():
> > > cj=CookieJar()
> > > def __init__(self, strUrl, strContent=None):
> > > self.Request = urllib2.Request(strUrl, strContent)
> > > self.cj.add_cookie_header(self.Request)
> > > self.Response = urllib2.urlopen(Request)
> > > self.cj.extract_cookies(self.Response, self.Request)
> > > def url
> > > def read(self, intCount):
> > > return self.Response.read(intCount)
> > > def headers(self, strHeaderName):
> > > return self.Response.headers[strHeaderName]
>
> > > The code does not work because each time SmartRequest is initiated,
> > > object 'cj' is cleared. How to avoid that?
> > > The only stupid solution I figured out is use a global CookieJar
> > > object. Is there anyway that could handle all this INSIDE the class?
>
> > > I am totally new to OOP & python programming, so could anyone give me
> > > some suggestions? Thanks in advance
>
> > Google for urllib2.HTTPCookieProcessor.
>
> > HTH,
> > Rob- Hide quoted text -
>
> > - Show quoted text -
>
> Wow, thank you Rob Wolfe! Your reply is shortest yet most helpful! I
> solved this problem by the following code.
>
> class HTTPRefererProcessor(urllib2.BaseHandler):
> """Add Referer header to requests.
>
> This only makes sense if you use each RefererProcessor for a
> single
> chain of requests only (so, for example, if you use a single
> HTTPRefererProcessor to fetch a series of URLs extracted from a
> single
> page, this will break).
>
> There's a proper implementation of this in module mechanize.
>
> """
> def __init__(self):
> self.referer = None
>
> def http_request(self, request):
> if ((self.referer is not None) and
> not request.has_header("Referer")):
> request.add_unredirected_header("Referer", self.referer)
> return request
>
> def http_response(self, request, response):
> self.referer = response.geturl()
> return response
>
> https_request = http_request
> https_response = http_response
>
> def main():
> cj = CookieJar()
> opener = urllib2.build_opener(
> urllib2.HTTPCookieProcessor(cj),
> HTTPRefererProcessor(),
> )
> urllib2.install_opener(opener)
>
> urllib2.urlopen(url1)
> urllib2.urlopen(url2)
>
> if "__main__" == __name__:
> main()
>
> And it's working great!
>
> Once again, thanks everyone!
How does the class HTTPReferrerProcessor do anything useful for you?
--
http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
On Feb 23, 2:42 am, Rob Wolfe <[EMAIL PROTECTED]> wrote:
> est <[EMAIL PROTECTED]> writes:
> > Hi all,
>
> > I need urllib2 do perform series of HTTP requests with cookie from
> > PREVIOUS request(like our browsers usually do ). Many people suggest I
> > use some library(e.g. pycURL) instead but I guess it's good practise
> > for a python beginner to DIY something rather than use existing tools.
>
> > So my problem is how to expand the urllib2 class
>
> > from cookielib import CookieJar
> > class SmartRequest():
> > cj=CookieJar()
> > def __init__(self, strUrl, strContent=None):
> > self.Request = urllib2.Request(strUrl, strContent)
> > self.cj.add_cookie_header(self.Request)
> > self.Response = urllib2.urlopen(Request)
> > self.cj.extract_cookies(self.Response, self.Request)
> > def url
> > def read(self, intCount):
> > return self.Response.read(intCount)
> > def headers(self, strHeaderName):
> > return self.Response.headers[strHeaderName]
>
> > The code does not work because each time SmartRequest is initiated,
> > object 'cj' is cleared. How to avoid that?
> > The only stupid solution I figured out is use a global CookieJar
> > object. Is there anyway that could handle all this INSIDE the class?
>
> > I am totally new to OOP & python programming, so could anyone give me
> > some suggestions? Thanks in advance
>
> Google for urllib2.HTTPCookieProcessor.
>
> HTH,
> Rob- Hide quoted text -
>
> - Show quoted text -
Wow, thank you Rob Wolfe! Your reply is shortest yet most helpful! I
solved this problem by the following code.
class HTTPRefererProcessor(urllib2.BaseHandler):
"""Add Referer header to requests.
This only makes sense if you use each RefererProcessor for a
single
chain of requests only (so, for example, if you use a single
HTTPRefererProcessor to fetch a series of URLs extracted from a
single
page, this will break).
There's a proper implementation of this in module mechanize.
"""
def __init__(self):
self.referer = None
def http_request(self, request):
if ((self.referer is not None) and
not request.has_header("Referer")):
request.add_unredirected_header("Referer", self.referer)
return request
def http_response(self, request, response):
self.referer = response.geturl()
return response
https_request = http_request
https_response = http_response
def main():
cj = CookieJar()
opener = urllib2.build_opener(
urllib2.HTTPCookieProcessor(cj),
HTTPRefererProcessor(),
)
urllib2.install_opener(opener)
urllib2.urlopen(url1)
urllib2.urlopen(url2)
if "__main__" == __name__:
main()
And it's working great!
Once again, thanks everyone!
--
http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
On Feb 23, 5:57 am, 7stud <[EMAIL PROTECTED]> wrote: > On Feb 21, 11:50 pm, est <[EMAIL PROTECTED]> wrote: > > > Hi all, > > > I need urllib2 do perform series of HTTP requests with cookie from > > PREVIOUS request(like our browsers usually do ). > > Cookies from a previous request made in the currently running > program? Or cookies from requests that were made when you previously > ran the program? > > > > > > > > > from cookielib import CookieJar > > class SmartRequest(): > > cj=CookieJar() > > def __init__(self, strUrl, strContent=None): > > self.Request= urllib2.Request(strUrl, strContent) > > self.cj.add_cookie_header(self.Request) > > self.Response = urllib2.urlopen(Request) > > self.cj.extract_cookies(self.Response, self.Request) > > def url > > def read(self, intCount): > > return self.Response.read(intCount) > > def headers(self, strHeaderName): > > return self.Response.headers[strHeaderName] > > > The code does not work because each time SmartRequest is initiated, > > object 'cj' is cleared. How to avoid that? > > The only stupid solution I figured out is use a global CookieJar > > object. Is there anyway that could handle all this INSIDE the class? > > Examine this code and its output: > > class SmartRequest(object): > def __init__(self, id): > if not getattr(SmartRequest, 'cj', None): > SmartRequest.cj = "I'm a cookie jar. Created by request: the getattr method is exactly what I am looking for, thanks! On Feb 23, 2:05 pm, 7stud <[EMAIL PROTECTED]> wrote: > On Feb 21, 11:50 pm, est <[EMAIL PROTECTED]> wrote: > > > > > class SmartRequest(): > > You should always define a class like this: > > class SmartRequest(object): > > unless you know of a specific reason not to. Thanks for the advice! -- http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
7stud wrote: > On Feb 21, 11:50 pm, est <[EMAIL PROTECTED]> wrote: >> class SmartRequest(): >> > > You should always define a class like this: > > class SmartRequest(object): > > > unless you know of a specific reason not to. > > It's much easier, though, just to put __metaclass__ = type at the start of any module where you want exlusively new-style objects. And I do agree that you should use exclusively new-style objects without a good reason for not doing, though thanks to Guido's hard work it mostly doesn't matter. $ cat test94.py __metaclass__ = type class Rhubarb: pass rhubarb = Rhubarb() print type(Rhubarb) print type(rhubarb) $ python test94.py regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
On Feb 21, 11:50 pm, est <[EMAIL PROTECTED]> wrote: > > class SmartRequest(): > You should always define a class like this: class SmartRequest(object): unless you know of a specific reason not to. -- http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
On Feb 21, 11:50 pm, est <[EMAIL PROTECTED]> wrote: > Hi all, > > I need urllib2 do perform series of HTTP requests with cookie from > PREVIOUS request(like our browsers usually do ). > Cookies from a previous request made in the currently running program? Or cookies from requests that were made when you previously ran the program? > > from cookielib import CookieJar > class SmartRequest(): > cj=CookieJar() > def __init__(self, strUrl, strContent=None): > self.Request = urllib2.Request(strUrl, strContent) > self.cj.add_cookie_header(self.Request) > self.Response = urllib2.urlopen(Request) > self.cj.extract_cookies(self.Response, self.Request) > def url > def read(self, intCount): > return self.Response.read(intCount) > def headers(self, strHeaderName): > return self.Response.headers[strHeaderName] > > The code does not work because each time SmartRequest is initiated, > object 'cj' is cleared. How to avoid that? > The only stupid solution I figured out is use a global CookieJar > object. Is there anyway that could handle all this INSIDE the class? > Examine this code and its output: class SmartRequest(object): def __init__(self, id): if not getattr(SmartRequest, 'cj', None): SmartRequest.cj = "I'm a cookie jar. Created by request: %s" % id r1 = SmartRequest(1) r2 = SmartRequest(2) print r1.cj print r2.cj --output:-- I'm a cookie jar. Created by request: 1 I'm a cookie jar. Created by request: 1 -- http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
On Feb 21, 11:50 pm, est <[EMAIL PROTECTED]> wrote: > Hi all, > > I need urllib2 do perform series of HTTP requests with cookie from > PREVIOUS request(like our browsers usually do ). Many people suggest I > use some library(e.g. pycURL) instead but I guess it's good practise > for a python beginner to DIY something rather than use existing tools. > > So my problem is how to expand the urllib2 class > > from cookielib import CookieJar > class SmartRequest(): > cj=CookieJar() > def __init__(self, strUrl, strContent=None): > self.Request = urllib2.Request(strUrl, strContent) > self.cj.add_cookie_header(self.Request) > self.Response = urllib2.urlopen(Request) > self.cj.extract_cookies(self.Response, self.Request) > def url > def read(self, intCount): > return self.Response.read(intCount) > def headers(self, strHeaderName): > return self.Response.headers[strHeaderName] > > The code does not work because each time SmartRequest is initiated, > object 'cj' is cleared. That's because every time you create a SmartRequest, this line executes: cj=CookieJar() That creates a new, *empty* cookie jar, i.e. it has no knowledge of any previously set cookies. > How to avoid that? If you read the docs on the cookielib module, and in particular CookieJar objects, you will notice that CookieJar objects are described in a section that is titled: CookieJar and FileCookieJar Objects. Hmm...I wonder what the difference is between a CookieJar object and a FileCookieJar Object? -- FileCookieJar implements the following additional methods: save(filename=None, ignore_discard=False, ignore_expires=False) Save cookies to a file. load(filename=None, ignore_discard=False, ignore_expires=False) Load cookies from a file. That seems promising. -- http://mail.python.org/mailman/listinfo/python-list
Re: n00b with urllib2: How to make it handle cookie automatically?
est <[EMAIL PROTECTED]> writes: > Hi all, > > I need urllib2 do perform series of HTTP requests with cookie from > PREVIOUS request(like our browsers usually do ). Many people suggest I > use some library(e.g. pycURL) instead but I guess it's good practise > for a python beginner to DIY something rather than use existing tools. > > So my problem is how to expand the urllib2 class > > from cookielib import CookieJar > class SmartRequest(): > cj=CookieJar() > def __init__(self, strUrl, strContent=None): > self.Request= urllib2.Request(strUrl, strContent) > self.cj.add_cookie_header(self.Request) > self.Response = urllib2.urlopen(Request) > self.cj.extract_cookies(self.Response, self.Request) > def url > def read(self, intCount): > return self.Response.read(intCount) > def headers(self, strHeaderName): > return self.Response.headers[strHeaderName] > > The code does not work because each time SmartRequest is initiated, > object 'cj' is cleared. How to avoid that? > The only stupid solution I figured out is use a global CookieJar > object. Is there anyway that could handle all this INSIDE the class? > > I am totally new to OOP & python programming, so could anyone give me > some suggestions? Thanks in advance Google for urllib2.HTTPCookieProcessor. HTH, Rob -- http://mail.python.org/mailman/listinfo/python-list
n00b with urllib2: How to make it handle cookie automatically?
Hi all, I need urllib2 do perform series of HTTP requests with cookie from PREVIOUS request(like our browsers usually do ). Many people suggest I use some library(e.g. pycURL) instead but I guess it's good practise for a python beginner to DIY something rather than use existing tools. So my problem is how to expand the urllib2 class from cookielib import CookieJar class SmartRequest(): cj=CookieJar() def __init__(self, strUrl, strContent=None): self.Request= urllib2.Request(strUrl, strContent) self.cj.add_cookie_header(self.Request) self.Response = urllib2.urlopen(Request) self.cj.extract_cookies(self.Response, self.Request) def url def read(self, intCount): return self.Response.read(intCount) def headers(self, strHeaderName): return self.Response.headers[strHeaderName] The code does not work because each time SmartRequest is initiated, object 'cj' is cleared. How to avoid that? The only stupid solution I figured out is use a global CookieJar object. Is there anyway that could handle all this INSIDE the class? I am totally new to OOP & python programming, so could anyone give me some suggestions? Thanks in advance -- http://mail.python.org/mailman/listinfo/python-list
