Re: [R] URL Scan

From: jmsc <jmstatsolutions_at_gmail.com>
Date: Mon, 18 Apr 2011 11:32:13 -0700 (PDT)

Ok thanks for the suggestion. I will look into that.

On Mon, Apr 18, 2011 at 5:27 AM, Barry Rowlingson [via R] < ml-node+3457010-2013527485-230912_at_n4.nabble.com> wrote:

> On Sun, Apr 17, 2011 at 11:56 PM, jmsc <[hidden email]<http://user/SendEmail.jtp?type=node&node=3457010&i=0&by-user=t>>
> wrote:
> > The site does not require a login/password. Another way to access the
> first
> > site would be to go to the second site, click Connecticut, click
> Canterbury,
> > CT, enter the online database, click search under Query by Location with
> > nothing in the search fields, and click the first property. Viewing the
> > frame source on this page redirects to the second site.
>
> it doesn't require a login/pass, but it uses session cookies to
> simulate a logged-in user (there's even a log out button that clears
> the session).
>
> > Also, could you direct me to or give me some instructions on scanning
> from
> > sites that do require a login/password? Thanks.
>
> I had a quick look for R-help posts on this ( RSiteSearch("cookies"),
> RSiteSearch("session") etc) but didn't find much. You probably want to
> install RCurl and look at the examples.
>
> Generally what happens is that a successful login, or in this case
> just visiting the database front page, causes the web server to send
> back a 'cookie' with a long ID number in it. For every further access
> to that web site your browser includes the cookie. The server then
> looks up the ID, goes 'yup, this is a valid session', and sends you
> the page you want. If the cookie isn't there, or the ID isn't valid
> (and the ID numbers are big enough to make guessing impractical), then
> you get the default page.
>
> Barry
>
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