ingo@78: package de.intevation.flys.client.server;
ingo@78: 
ingo@78: import java.io.OutputStream;
ingo@78: import java.io.IOException;
ingo@78: import java.util.HashMap;
ingo@78: import java.util.Map;
ingo@78: 
ingo@78: import org.w3c.dom.Document;
ingo@78: 
ingo@78: import javax.servlet.http.HttpServlet;
ingo@78: import javax.servlet.http.HttpServletRequest;
ingo@78: import javax.servlet.http.HttpServletResponse;
ingo@78: 
ingo@78: import de.intevation.artifacts.httpclient.http.HttpClient;
ingo@78: import de.intevation.artifacts.httpclient.http.HttpClientImpl;
ingo@78: import de.intevation.artifacts.httpclient.objects.Artifact;
ingo@78: import de.intevation.artifacts.httpclient.utils.ArtifactProtocolUtils;
ingo@78: 
ingo@78: 
ingo@78: /**
ingo@78:  * This service is used to request a chart from the artifact server. The
ingo@78:  * response is directed directly to the output stream, so the image that is
ingo@78:  * retrieved is displayed in the UI afterwards.
ingo@78:  *
ingo@78:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@78:  */
ingo@78: public class ChartOutputServiceImpl
ingo@78: extends      HttpServlet
ingo@78: {
ingo@78:     public void doGet(HttpServletRequest req, HttpServletResponse resp) {
ingo@78:         System.out.println("ChartOutputServiceImpl.doGet");
ingo@78: 
ingo@78:         try {
ingo@78:             OutputStream out = resp.getOutputStream();
ingo@78: 
ingo@78:             String serverUrl = req.getParameter("server");
ingo@78:             String uuid      = req.getParameter("uuid");
ingo@78:             String hash      = req.getParameter("hash");
ingo@78:             String width     = req.getParameter("width");
ingo@78:             String height    = req.getParameter("height");
ingo@78:             String target    = req.getParameter("target");
ingo@78:             String mimeType  = "image/png";
ingo@78: 
ingo@78:             Map opts = new HashMap();
ingo@78:             opts.put("width", width);
ingo@78:             opts.put("height", height);
ingo@78:             opts.put("mimeType", mimeType);
ingo@78:             opts.put("points", "false");
ingo@78: 
ingo@78:             Document chart = ArtifactProtocolUtils.createChartDocument(
ingo@78:                 new Artifact(hash, uuid), opts);
ingo@78: 
ingo@78:             HttpClient client = new HttpClientImpl(serverUrl);
ingo@78:             client.out(new Artifact(uuid, hash), chart, target, out);
ingo@78: 
ingo@78:             out.close();
ingo@78:             out.flush();
ingo@78:         }
ingo@78:         catch (IOException ioe) {
ingo@78:             System.err.println(ioe.getMessage());
ingo@78:         }
ingo@78:     }
ingo@78: }