Access-Control-Allow-Origin is a response header, to be sent from the server. See http://www.w3.org/TR/cors/ Note that this rules out quite a few users though: http://caniuse.com/cors (note: GWT won't use XDomainRequest) If you need to support IE8/IE9, then use deferred-binding and JSNI to use XDomainRequest in those browsers; or use another technique that works across browsers:
- JSON-P with JsonpRequestBuilder (for GETs only), - using a "proxy" on the same origin as your GWT app : https://code.google.com/p/google-web-toolkit/issues/detail?id=3131#c25 - or run your GWT app from the same origin as your service (that might be useful: http://www.gwtproject.org/doc/latest/DevGuideCompilingAndDebugging.html#How_do_I_use_my_own_server_in_development_mode_instead_of_GWT's ) On Wednesday, September 4, 2013 11:50:12 PM UTC+2, SergeZ wrote: > > Hi everyone! Please, help me figure out how can I manage to call the > external REST service from GWT application's client code. > > I've heard, that GWT has a RequstBuilder class in order to do such things, > but suddenly I figured out that this is a quite ancient approach to > implement. Hence, the following code won't work: > > RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, " > http://localhost:19999/hello";); > builder.setHeader("content-type", > "text/html;charset=windows-1251"); > builder.setHeader("Access-Control-Allow-Origin", "*");//*result doesn > not depend on this line of code* > > try { > Request response = builder.sendRequest("", new > RequestCallback() { > @Override > public void onResponseReceived(Request request, Response > response) { > > answerFromRest.setText(request.toString() + "\n"); > answerFromRest.setText(response.toString() + "\n"); > > int statusCode = response.getStatusCode(); > > if(statusCode == Response.SC_OK) { > String responseBody = response.getText(); > answerFromRest.setText("The result is " + > responseBody); > } else { > answerFromRest.setText("There was an error " + > statusCode + " =" + response.getText()); > } > } > > @Override > public void onError(Request request, Throwable exception) { > //error actually sending the request, never got sent > } > }); > } catch (RequestException e) { > e.printStackTrace(); //To change body of catch statement use > File | Settings | File Templates. > } > * > * > * > * > *statusCode *always equals 0 though when I access my depolyed REST > through a WebBrowser, I get the result. This makes me feel like there is > really no more support for that code in GWT... > > So, the question is - is there the other (working) way to call REST > writing code in java ( I mean w/o using JSNI code to do that ). > > Any way, whatever approach is ( if it exists in GWT's nowadays ), can you > please provide either _code_ or _decent link with tutor or smth like that_ ? > > Thank you very much, for the time spent on my subject!!!! > > * > * > > -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
