Can't get HttpClient to work with a special webpage

[Frédérick Permantier <fr...@helpcorner.be>]

Hi,

 I just started to use HttpClient. I tested it on two webpages, I made it work on a
simple webpage (to loggin into SquirrelMail). But I can't make it work on this page :
http://www.edpnet.be/traffic2.aspx?R=1

I would like to know if there's something special to do about that webpage.

He is the code I used based upon a demo code (I removed my username and password from
the code, but if you want to help you can contact me by email...) :


import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.cookie.CookieSpec;
import org.apache.commons.httpclient.methods.*;
import org.apache.commons.httpclient.Cookie;

public class Quota {
    static final String LOGON_SITE = "www.edpnet.be";
    static final int    LOGON_PORT = 80;

    public Quota() {
        super();
    }

    public static void main(String[] args) throws Exception {

        HttpClient client = new HttpClient();
        client.getHostConfiguration().setHost(LOGON_SITE,LOGON_PORT,"http");
        client.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);

        GetMethod authget = new GetMethod("/traffic2.aspx?R=1");
        client.executeMethod(authget);
        System.out.println("Login form get: " + authget.getStatusLine().toString());
        // release any connection resources used by the method
        authget.releaseConnection();

        // See if we got any cookies
        CookieSpec cookiespec = CookiePolicy.getDefaultSpec();
        Cookie[] initcookies =
cookiespec.match(LOGON_SITE,LOGON_PORT,"/",false,client.getState().getCookies());
        System.out.println("Initial set of cookies:");
        if (initcookies.length == 0) {
            System.out.println("None");
        }
        else {
        	for (int i = 0; i < initcookies.length; i++) {
        		System.out.println("- " + initcookies[i].toString());
            }
        }

        PostMethod authpost = new PostMethod("/traffic2.aspx?R=1");
        // Prepare login parameters
        NameValuePair userid   = new NameValuePair("tbUserName","******");
        NameValuePair password = new NameValuePair("tbPassword","******");
        authpost.setRequestBody(new NameValuePair[] {userid, password});
        client.executeMethod(authpost);
        System.out.println("Login form post: " + authpost.getStatusLine().toString());
        // release any connection resources used by the method
        authpost.releaseConnection();

        // See if we got any cookies
        // The only way of telling whether logon succeeded is
        // by finding a session cookie
        Cookie[] logoncookies =
cookiespec.match(LOGON_SITE,LOGON_PORT,"/",false,client.getState().getCookies());
        System.out.println("Logon cookies:");
        if (logoncookies.length == 0) {
            System.out.println("None");
        }
        else {
        	for (int i = 0; i < logoncookies.length; i++) {
        		System.out.println("- " + logoncookies[i].toString());
            }
        }
        int statuscode = authpost.getStatusCode();
        if ((statuscode == HttpStatus.SC_MOVED_TEMPORARILY) ||
            (statuscode == HttpStatus.SC_MOVED_PERMANENTLY) ||
            (statuscode == HttpStatus.SC_SEE_OTHER) ||
            (statuscode == HttpStatus.SC_TEMPORARY_REDIRECT)) {
            Header header = authpost.getResponseHeader("location");
            if (header != null) {
                String newuri = header.getValue();
                if ((newuri == null) || (newuri.equals(""))) {
                    newuri = "/";
                }
                System.out.println("Redirect target: " + newuri);
                GetMethod redirect = new GetMethod(newuri);

                client.executeMethod(redirect);
                System.out.println("Redirect: " + redirect.getStatusLine().toString());
                // release any connection resources used by the method
                redirect.releaseConnection();
            } else {
                System.out.println("Invalid redirect");
                System.exit(1);
            }
        }
        GetMethod getmail = new GetMethod("/traffic2_details.aspx");
        client.executeMethod(getmail);
        System.out.println(getmail.getResponseBodyAsString());
    }
}

Thanks for your help !

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Re: Can't get HttpClient to work with a special webpage

[Roland Weber <ht...@dubioso.net>]

Hello Frederick,

>  I just started to use HttpClient. I tested it on two webpages, I made it work on a
> simple webpage (to loggin into SquirrelMail). But I can't make it work on this page :
> http://www.edpnet.be/traffic2.aspx?R=1
> 
> I would like to know if there's something special to do about that webpage.

Please have a look at our Client HTTP Programming Primer:
http://wiki.apache.org/jakarta-httpclient/ForAbsoluteBeginners

It is most likely that your problem is addressed there.

cheers,
  Roland


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