private void checkUpdate()
throws IOException, SAXException, ParserConfigurationException, XPathExpressionException {
String url;
try {
url = Registry.getProperty("updater.url");
} catch (Exception e) {
throw new IOException(e.getMessage()); // i hate leaking "exception"
}
HttpClient client = new HttpClient();
Map<String, Object> params = new HashMap<String, Object>();
params.put("version", Build.getVersion());
params.put("release", "" + Build.getRelease());
if (PreferencesManager.getVersionIndependentPreferences()
.getBoolean("updater.include.usageData", true)) {
params.put("uuid", Application.getUUID());
params.put("platform.arch", Platform.getArch());
params.put("platform.os", Platform.getOS().getCanonicalName());
params.put("platform.os.version", Platform.getOS().getVersion());
params.put("locale.country", LanguageBundle.getCurrentLocale().getCountry());
params.put("locale.language", LanguageBundle.getCurrentLocale().getLanguage());
}
List<NameValuePair> nvp = new ArrayList<NameValuePair>();
for (String key : params.keySet()) nvp.add(new NameValuePair(key, "" + params.get(key)));
GetMethod request = new GetMethod(url);
request.setQueryString(nvp.toArray(new NameValuePair[nvp.size()]));
LogFactory.getLog(getClass()).info(String.format("Checking for updates: %s", request.getURI()));
client.executeMethod(request);
String response = request.getResponseBodyAsString();
Document doc = DomUtil.parseXMLString(response);
availableRelease = XPathHelper.xpathAsDouble(doc, "/korsakow/release");
availableVersion = XPathHelper.xpathAsString(doc, "/korsakow/version");
message = XPathHelper.xpathAsString(doc, "/korsakow/message");
}
@Override
public void run() {
try {
checkUpdate();
} catch (IOException e) {
// we don't notify on IO errors because a common case is when you're using the software
// without a connection or the site is
// down or something, don't bug the user about it.
// other errors like in the format of the XML are exception circumstance.
Logger.getLogger(Updater.class).error(e);
} catch (Exception e) {
UIUtil.runUITaskNow(new ErrorAction(LanguageBundle.getString("updater.error.title"), e));
}
if (availableRelease > Build.getRelease()) {
UIUtil.runUITaskNow(
new AlertAction(
LanguageBundle.getString("updater.newversion.title"),
LanguageBundle.getString("updater.newversion.message", availableVersion, message)));
}
}