Please excuse the newbie wording below, Im really not sure how to
phrase this problem correctly, which is of course causing me problems
with trying to find a solution by searching online, as I dont really
know what it is that i need to do, but I think its an "HTTP POST" (but
it could be send/get/submit/request?! as Ive seen all these terms used
when hunting around for a solution!)
Ive looked around as much as I can though and as is often the case
cant seem to find any working examples of what I need to do which is
to call a 3rd party website via an HTTP call from the server side of
my GWT/GAE application.
Essentially the following code snippet does the job on the client side
(ive changed the parameters to protect confidentiality):
String SendText="http://www.services.dynmark.com/
HttpServices/SendMessage.ashx?" +
"user=username" +
"&password=password" +
"&to=447765111222"+
"&from=447765222111" +
"&text=MESSAGE_TEXT";
Anchor SendMessageLink = new Anchor("Send Message");
SendMessageLink.setHref(SendText);
RootPanel.get().add(SendMessageLink);
when the user clicks on the link though, it takes them to an XML
result page with a reference number embedded.
Obviously i dont want that to happen, i need to capture the reference
number so I can then make a different HTTP request to get the status,
and I dont want the user to see the HTTP text (password) or to be
redirected to another website.
Ive then tried to use the Requestbuilder function (class/widget?) of
GWT, but thats when I run into the same origin policy security
restriction (http://en.wikipedia.org/wiki/Same_origin_policy)
Reading around on the internet, it seems that the only way to achieve
what I need is to run the HTTP post from the server after an RPC
conection. I have tried to implement this, but have found no working
examples to figure out how to achieve this. I have tried to simple
copy and paste the Requestbuilder code into my server functions, only
to have the following error appear on the eclipse console:
"Caused by: java.lang.UnsupportedOperationException: ERROR: GWT.create
() is only usable in client code! It cannot be called, for example,
from server code."
If anyone can give me some help and advice on this topic, then I would
be very greatful!
Thanks,
John
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