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<title>PhpWiki - Using Cookies With Parser</title>
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<div class="wikitext"><p><b>Using Cookies with the Parser</b></p>
<p><b>Problem:</b> (by ShanSivakolundhu)<br />
In order to access a particular site I neet to have
a cookie set. Is there any way I can set the cookie
before I create a parser object ? Just like ...</p>
<pre>
URLConnection.("Cookie", cookieValue);
URLConnection.connect();</pre>
<p><b>Solution:</b> (by BobLewis)<br />
In order to send cookies in your Http requests, all
you need to do is set the Cookie HTTP Header in the
URL Connection.</p>
<p>Create the URL and open the connection, but before passing
the connection to the parser, set the "Cookie" request property:</p>
<pre>
import java.net.URL;
import java.net.URLConnection;
import javax.servlet.http.Cookie;
import org.htmlparser.Parser;
import org.htmlparser.util.NodeIterator;
/**
* Demonstrate cookie usage with the HTML Parser.
*/
public class CookieDemo
{
/**
* The cookies.
* You'll need to get these from your browser's cookie jar or somewhere.
* Only the cookies that apply to the URL you are using and haven't expired
* are supposed to be passed in the request.
* This is only part of a real cookie, much longer than shown.
*/
public static Cookie[] cookies =
{
new Cookie ("user", "%2536%2535%2538%2531%2539%2530%253a etc."),
};
/**
* Generate a HTTP cookie header value string from an array of cookies.
* <pre>
* The syntax for the header is:
*
* cookie = "Cookie:" cookie-version
* 1*((";" | ",") cookie-value)
* cookie-value = NAME "=" VALUE [";" path] [";" domain]
* cookie-version = "$Version" "=" value
* NAME = attr
* VALUE = value
* path = "$Path" "=" value
* domain = "$Domain" "=" value
*
* </pre>
* @param cookies The cookies which should be set in the header value.
* @return A string containing the HTTP Cookie Header value.
* @see <a href="http://www.ietf.org/rfc/rfc2109.txt">RFC 2109</a>
*/
public static String generateCookieHeader (Cookie[] cookies)
{
int version;
boolean quote;
StringBuffer ret;
ret = new StringBuffer ();
version = 0;
for (int i = 0; i < cookies.length; i++)
version = Math.max (version, cookies[i].getVersion ());
if (0 != version)
{
ret.append ("$Version=\"");
ret.append (version);
ret.append ("\"");
}
for (int i = 0; i < cookies.length; i++)
{
if (0 != ret.length ())
ret.append ("; ");
ret.append (cookies[i].getName ());
ret.append ("=");
if (0 != version)
ret.append ("\"");
ret.append (cookies[i].getValue ());
if (0 != version)
ret.append ("\"");
if (0 != version)
{
if ((null != cookies[i].getPath ())
&& (0 != cookies[i].getPath ().length ()))
{
ret.append ("; $Path=\"");
ret.append (cookies[i].getPath ());
ret.append ("\"");
}
if ((null != cookies[i].getDomain ())
&& (0 != cookies[i].getDomain ().length ()))
{
ret.append ("; $Domain=\"");
ret.append (cookies[i].getDomain ());
ret.append ("\"");
}
}
}
return (ret.toString ());
}
public static void main (String[] args) throws Exception
{
Parser parser;
URL url;
URLConnection connection;
parser = new Parser ();
url = new URL ("http://slashdot.org");
connection = url.openConnection ();
connection.setRequestProperty ("Cookie", generateCookieHeader (cookies));
parser.setConnection (connection);
for (NodeIterator iterator = parser.elements (); iterator.hasMoreNodes (); )
System.out.println (iterator.nextNode ());
}
}</pre>
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