Hi, At least with Google checkout, I have found a better solution. I have a form with just their button image as a submit, and in my handler I do:
String xmlCart = cart.createXML(); MerchantInfo mi = GoogleMerchantInfoFactory.createMerchantInfo( EnvironmentType.Sandbox); CheckoutShoppingCartRequest cscr = new CheckoutShoppingCartRequest( mi, xmlCart); CheckoutResponse checkoutResponse = cscr.send(); String redirectUrl = checkoutResponse.getRedirectUrl(); It turns out that GC has some java code already that uses the HttpURLConnection class - it posts the data in the shopping cart, the retrieves a forwarding url that takes the user to their payment page. Google's CheckoutShoppingCartRequest contains the HttpURLConnection code which posts the data - server to server. Thanks for the heads up. Unfortunately, I don't think Paypal have an equivalent, unless I sign up for their £20/month Paypal Pro ( I am not sure if their code makes this functionality available - for that price, I won't even look - I'll just stick to using javascript onLoad(submit()) in a page conatining nothing but the Paypal button form. John On 20/03/2008, Christopher Schultz <[EMAIL PROTECTED]> wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > John, > > > John Pedersen wrote: > | Can anyone suggest how I can forward a post using servlets? > > > [snip] > > > | Then, depending on which button the user clicks, I want to forward the > user > | on to google/paypal using POST, adding the parameters such as cart, > | signature. > > > This is typically called a "man-in-the-middle attack". ;) > > Seriously, though, you'll have to build the POST manually. Look at the > java.net.HttpURLConnection class. You could also look at HttpClient > (http://hc.apache.org/httpcomponents-client/index.html), which > encapsulates a lot of what you want to do. > > Just remember that if you decide to act as a proxy like this, you will > have top handle a lot of things like cookie-passing, etc. in order to do > it properly. > > Perhaps there's a better API for you to use than their user-facing > web-based one... such as a SOAP or REST API where a lot of those issues > are removed. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.8 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iEYEARECAAYFAkfiaE8ACgkQ9CaO5/Lv0PAAVgCffK5ZwvwMZwMVXcDsF295MqjJ > GC0AoKJOK1s4TMfT/fUDUatijBn9c/OB > =mlDx > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
