Mercurial > dive4elements > river
comparison flys-client/src/main/java/org/dive4elements/river/client/server/BedloadKMChartServiceImpl.java @ 5834:f507086aa94b
Repaired internal references.
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 25 Apr 2013 12:31:32 +0200 |
| parents | flys-client/src/main/java/de/intevation/flys/client/server/BedloadKMChartServiceImpl.java@f84ed73311f2 |
| children | 821a02bbfb4e |
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| 5833:a2bdc0f524e8 | 5834:f507086aa94b |
|---|---|
| 1 package de.intevation.flys.client.server; | |
| 2 | |
| 3 import java.io.IOException; | |
| 4 import java.io.InputStream; | |
| 5 import java.io.OutputStream; | |
| 6 | |
| 7 import javax.servlet.http.HttpServlet; | |
| 8 import javax.servlet.http.HttpServletRequest; | |
| 9 import javax.servlet.http.HttpServletResponse; | |
| 10 | |
| 11 import org.apache.log4j.Logger; | |
| 12 import org.w3c.dom.Document; | |
| 13 import org.w3c.dom.Element; | |
| 14 import org.w3c.dom.NodeList; | |
| 15 | |
| 16 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 17 import de.intevation.artifacts.httpclient.exceptions.ConnectionException; | |
| 18 import de.intevation.artifacts.httpclient.http.HttpClient; | |
| 19 import de.intevation.artifacts.httpclient.http.HttpClientImpl; | |
| 20 import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler; | |
| 21 | |
| 22 public class BedloadKMChartServiceImpl extends HttpServlet { | |
| 23 private static final Logger log = | |
| 24 Logger.getLogger(FixingsKMChartServiceImpl.class); | |
| 25 | |
| 26 public static final String SERVICE_NAME = "bedload-km-chart"; | |
| 27 | |
| 28 public BedloadKMChartServiceImpl() { | |
| 29 } | |
| 30 | |
| 31 public void doGet(HttpServletRequest req, HttpServletResponse resp) { | |
| 32 | |
| 33 log.info("BedloadKMChartServiceImpl.doGet"); | |
| 34 | |
| 35 String url = getServletContext().getInitParameter("server-url"); | |
| 36 String locale = req.getParameter("locale"); | |
| 37 String filter = req.getParameter("filter"); | |
| 38 | |
| 39 if (filter == null || filter.length() == 0) { | |
| 40 log.warn("Missing 'filter' parameter."); | |
| 41 return; | |
| 42 } | |
| 43 | |
| 44 if (locale == null || locale.length() == 0) { | |
| 45 locale = "de"; | |
| 46 } | |
| 47 | |
| 48 Document filterDoc = XMLUtils.jsonToXML(filter); | |
| 49 | |
| 50 if (filterDoc == null) { | |
| 51 log.warn("Creating filter document failed."); | |
| 52 return; | |
| 53 } | |
| 54 | |
| 55 InputStream in; | |
| 56 | |
| 57 try { | |
| 58 HttpClient client = new HttpClientImpl(url, locale); | |
| 59 in = (InputStream)client.callService( | |
| 60 url, // XXX: Why? The URL is passed by construction already. | |
| 61 SERVICE_NAME, | |
| 62 filterDoc, | |
| 63 new StreamResponseHandler()); | |
| 64 } | |
| 65 catch (ConnectionException ce) { | |
| 66 log.error(ce); | |
| 67 return; | |
| 68 } | |
| 69 | |
| 70 resp.setHeader("Content-Type", guessMIMEType(filterDoc)); | |
| 71 | |
| 72 try { | |
| 73 OutputStream out = resp.getOutputStream(); | |
| 74 | |
| 75 byte [] buf = new byte[4096]; | |
| 76 int i = -1; | |
| 77 while ((i = in.read(buf)) >= 0) { | |
| 78 out.write(buf, 0, i); | |
| 79 } | |
| 80 out.flush(); | |
| 81 } | |
| 82 catch (IOException ioe) { | |
| 83 log.error(ioe); | |
| 84 } | |
| 85 finally { | |
| 86 try { in.close(); } | |
| 87 catch (IOException ioe) { /* ignored */ } | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 protected static String guessMIMEType(Document document) { | |
| 92 | |
| 93 NodeList formats = document.getElementsByTagName("format"); | |
| 94 | |
| 95 String format = "png"; | |
| 96 | |
| 97 if (formats.getLength() > 0) { | |
| 98 String type = ((Element)formats.item(0)).getAttribute("type"); | |
| 99 if (type.length() > 0) { | |
| 100 format = type; | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 return "image/" + format; | |
| 105 } | |
| 106 } |