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@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
>
> ______________________________________________
> [hidden email]<http://user/SendEmail.jtp?type=node&node=3457010&i=1&by-user=t>mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
> ------------------------------
>  If you reply to this email, your message will be added to the discussion
> below:
> http://r.789695.n4.nabble.com/URL-Scan-tp3456084p3457010.html
>  To unsubscribe from URL Scan, click here<http://r.789695.n4.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=3456084&code=am1zdGF0c29sdXRpb25zQGdtYWlsLmNvbXwzNDU2MDg0fDIwNjIxMjY3NjA=>.
>
>


--
View this message in context: http://r.789695.n4.nabble.com/URL-Scan-tp3456084p3458336.html
Sent from the R help mailing list archive at Nabble.com.
	[[alternative HTML version deleted]]

