In order to receive the data back and parse it for whatever you can do
something like this:
URL u = new URL("www.yahoo.com/whatever"); // URL to post data to
URLConnection uc = u.openConnection();
uc.setUseCaches(false);
uc.setDoOutput(true); // Lets you write to the connection
Writer out = new BufferedWriter(new
OutputStreamWriter(uc.getOutputStream(), "ISO-8859-1"));
out.write(parameter values); // Whatever values that your site is
expecting
out.flush();
out.close();
InputStreamReader r = new InputStreamReader(uc.getInputStream());
Then you can just keep doing r.read until the entire page is read or you
have found what you want.
You may want to take a look at using threads to automate your lookups since
they are better suited for this sort of thing I believe.
~Matt Penner
-----Original Message-----
From: A mailing list for discussion about Sun Microsystem's Java Servlet
API Technology. [mailto:[EMAIL PROTECTED]] On Behalf Of Kronos
B
Sent: Wednesday, November 29, 2000 10:14 PM
To: [EMAIL PROTECTED]
Subject: Question: servlet to extract HTML from a webpage
Hi,
This question might be really basic, but I just 2 weeks old as a servlet
developer.
I have written a servlet which serves as a stock quote wrapper, ie, if you
type a stock ticker, say MSFT in the box provided, the servlet sends the
request to yahoo-finance, and gets the results. This servlet is doing
nothing terrific...the same thing can be done by going to Yahoo-finance
directly!
However, I want this servlet to go to that yahoo-finance page, extract
that specific stock quote, compare it with a threshold value, and generate
an alert if the stock has fallen below the threshold.
So I need to know two things: How to extract HTML from the Yahoo-finance
page using a servlet?<Then I will parse it to get the stock quote>
#2 How do I make this servlet repeat the stuff every 1 minute(say) to
constantly keep monitoring the stock? <will a 'C' style loop, like
while(1) do?>
I *really* appreciate your help in this regard!
Thanks in advance!
___________________________________________________________________________
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff SERVLET-INTEREST".
Archives: http://archives.java.sun.com/archives/servlet-interest.html
Resources: http://java.sun.com/products/servlet/external-resources.html
LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
___________________________________________________________________________
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff SERVLET-INTEREST".
Archives: http://archives.java.sun.com/archives/servlet-interest.html
Resources: http://java.sun.com/products/servlet/external-resources.html
LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
