Thank you for your answer but I think this is only correct when you are
returning a CharSequence, what's happen when you like returning Image,
for example?
El 21/12/11 10:33, Martin Grigorov escribió:
The problem with EmptyRequestHandler is that the previous response is
reset and an empty is written to the client.
There are several solutions for your problem:
1) use a IResource instead of a Page. You don't use components anyway.
See wicketinaction.com/2011/07/wicket-1-5-mounting-resources/ for more info.
2) Use a WebPage that implements
org.apache.wicket.markup.IMarkupResourceStreamProvider and
org.apache.wicket.markup.IMarkupCacheKeyProvider
The first interface is needed to generate the markup dynamically. E.g.
: return new StringResourceStream(yourDataReturnedFromHttpClient)
The second should return "null" in #getCacheKey() to not cache the
result from the first. I.e. Wicket will ask IMarkupCacheKeyProvider
for new data for each request.
3) Do what Igor suggested with EmptyRequestHandler but use
TextRequestHandler(yourDataReturnedFromHttpClient) instead.
On Tue, Dec 20, 2011 at 10:11 PM, Igor Vaynberg<igor.vaynb...@gmail.com> wrote:
what is the stack trace look like now?
also, no need to extend a webpage, why not just impplement
IRequestHandler directly and mount it somewhere so you can construct
urls to it...
-igor
On Tue, Dec 20, 2011 at 11:24 AM, Pablo Díaz<inspd...@gmail.com> wrote:
I've done that, but I get the same result :(
El 20/12/11 20:18, Igor Vaynberg escribió:
(httpservletresponse)getresponse().getcontainerresponse()
-igor
On Tue, Dec 20, 2011 at 10:58 AM, Pablo Díaz<inspd...@gmail.com> wrote:
Ok, but How I can get the httpservletresponse object to write in it? I'm
extending the WebPage class ...
El 20/12/11 19:26, Igor Vaynberg escribió:
try writing directly into httpservletresponse instead of wicket's
response. there is a bug fix for this in the upcoming release....
-igor
On Tue, Dec 20, 2011 at 10:03 AM, Pablo Díaz<inspd...@gmail.com>
wrote:
Ok, thank you, I'm not getting the error if I use your code, but I'm
not
able to gets the response (I always get a blank image, when I must get
a
map).
I mean, I only like getting the request done from someone and check if
he
has enough privileges to do some operation Then, I change some
parameters
depends on his role he can.
My code is like this:
public class ProxyAction extends WebPage {
public ProxyAction(PageParameters parameters){
URL url = null;
Logger logger = Logger.getLogger(ProxyAction.class);
HttpURLConnection con = null;
Response response = getResponse();
ByteArrayBuffer bab = new ByteArrayBuffer();
try {
String mapserverUrl =
"http://localhost/cgi-bin/mapserv?mode=map&map=/var/local/mapserver/inveco/map/client_draw.map&layers=provincias";;
Iterator<String> it = claves.iterator();
while(it.hasNext()){
String clave = (String) it.next();
mapserverUrl= mapserverUrl + "&"+ clave+"=";
List<StringValue> valores =
parameters.getValues(clave);
for(int i=0; i<valores.size(); i++){
mapserverUrl = mapserverUrl+valores.get(i)+" ";
}
}
url = new URL(mapserverUrl);
con = (HttpURLConnection) url.openConnection();
InputStream istream = con.getInputStream();
byte[] b = new byte[1];
for(;;){
if(istream.read(b) == -1)
break;
bab.write(b);
}
response.write(bab.getRawData());
getRequestCycle().replaceAllRequestHandlers(new
EmptyRequestHandler());
} catch (MalformedURLException e) {
logger.error(e.getMessage());
} catch (IOException e) {
logger.error(e.getMessage());
}
//this.getRequestCycle().setResponse(response);
}
}
El 20/12/11 18:17, Igor Vaynberg escribió:
in the future, start with the error :)
you have to tell wicket that it should not render the page after you
have written the data out...
output.write(data);
getrequestcycle().replaceallrequesthandlers(new
EmptyRequestHandler());
-igor
On Tue, Dec 20, 2011 at 8:54 AM, Pablo Díaz<inspd...@gmail.com>
wrote:
Because when I try to write to response I get's this error:
ERROR - DefaultExceptionMapper - Unexpected error occurred
java.lang.IllegalStateException: Can't call write(CharSequence) after
write(byte[]) has been called.
at
org.apache.wicket.protocol.http.BufferedWebResponse.write(BufferedWebResponse.java:465)
at
org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1525)
at
org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1638)
at org.apache.wicket.Page.onRender(Page.java:904)
at
org.apache.wicket.markup.html.WebPage.onRender(WebPage.java:140)
at org.apache.wicket.Component.internalRender(Component.java:2347)
at org.apache.wicket.Component.render(Component.java:2275)
at org.apache.wicket.Page.renderPage(Page.java:1035)
at
org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:105)
at
org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:224)
at
org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:167)
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:750)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:252)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:209)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:280)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)
at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
I tried to do this in serveral versions of wicket and always get the
same
error.
El 20/12/11 17:15, Igor Vaynberg escribió:
why doesnt that work in wicket?
-igor
On Tue, Dec 20, 2011 at 12:46 AM, Pablo Díaz<inspd...@gmail.com>
wrote:
Hi,
I'm trying to do something like an internal proxy in my web-app to
check
permisions to connect from my portal to a mapserver server.
So, I'm trying to get de request from an OpenLayers and redirect
the
connection throw my internal proxy (after check the roles) .
I've done this before in Struts, but I don't know how do this in
Wicket.
In Struts is something similar to do this:
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(mapserverURL);
method.getParams().setVersion(HttpVersion.HTTP_1_0);
// Provide custom retry handler is necessary
method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler(3, false));
method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,
"ISO-8859-1");
method.getParams().setCredentialCharset("ISO-8859-1");
try {
// Execute the method.
int statusCode = client.executeMethod(method);
if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: " +
method.getStatusLine());
}
InputStream input = method.getResponseBodyAsStream();
output = response.getOutputStream();
byte[] data = new byte[1];
for (;;) {
if ((input.read(data)) == -1) {
break;
}
output.write(data);
}
} catch (HttpException e) {
System.err.println("Fatal protocol violation: " +
e.getMessage());
e.printStackTrace();
return null;
} catch (IOException e) {
System.err.println("Fatal transport error: " +
e.getMessage());
e.printStackTrace();
return null;
} finally {
// Release the connection.
method.releaseConnection();
}
return null;
Can anybody help me?
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