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/*
* Copyright 2000-2011 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.openapi.updateSettings.impl;
import com.google.common.net.HttpHeaders;
import com.intellij.ide.IdeBundle;
import com.intellij.ide.reporter.ConnectionException;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.JDOMUtil;
import com.intellij.openapi.util.Ref;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.util.net.HttpConfigurable;
import org.jdom.JDOMException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class UpdatesXmlLoader {
private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.updateSettings.impl.UpdatesXmlLoader");
private final String updateUrl;
public UpdatesXmlLoader(final String updatesUrl) {
this.updateUrl = updatesUrl;
}
@Nullable
public UpdatesInfo loadUpdatesInfo() throws ConnectionException{
LOG.debug("load update xml (UPDATE_URL='" + updateUrl + "' )");
if (StringUtil.isEmpty(updateUrl)) {
LOG.debug("update url is empty: updates will not be checked");
return null;
}
final Ref<Exception> error = new Ref<Exception>();
FutureTask<UpdatesInfo> ft = new FutureTask<UpdatesInfo>(new Callable<UpdatesInfo>() {
@Nullable
@Override
public UpdatesInfo call() throws Exception {
try {
prepareUrl(updateUrl);
URL requestUrl = prepareRequestUrl(updateUrl);
URLConnection cnx;
int followCount = 2;
while(true) {
cnx = requestUrl.openConnection();
cnx.setConnectTimeout(HttpConfigurable.CONNECTION_TIMEOUT);
cnx.setReadTimeout(HttpConfigurable.CONNECTION_TIMEOUT);
if (cnx instanceof HttpURLConnection) {
HttpURLConnection hcnx = (HttpURLConnection)cnx;
int code = hcnx.getResponseCode();
if (code >= 301 && code <= 307 && --followCount >= 0) {
String loc = hcnx.getHeaderField(HttpHeaders.LOCATION);
if (loc != null) {
prepareUrl(loc);
requestUrl = prepareRequestUrl(loc);
continue;
}
}
}
break;
}
final InputStream inputStream = cnx.getInputStream();
Reader reader = new InputStreamReader(inputStream);
try {
return new UpdatesInfo(JDOMUtil.loadDocument(inputStream).getRootElement());
}
catch (JDOMException e) {
LOG.info(e); // Broken xml downloaded. Don't bother telling user.
}
finally {
reader.close();
inputStream.close();
}
}
catch (Exception e) {
error.set(e);
}
return null;
}
});
ApplicationManager.getApplication().executeOnPooledThread(ft);
try {
UpdatesInfo result = ft.get(5, TimeUnit.SECONDS);
if (!error.isNull()) {
//noinspection ThrowableResultOfMethodCallIgnored
throw new ConnectionException(error.get());
}
return result;
}
catch (TimeoutException e) {
// ignore
}
catch (Exception e) {
LOG.debug(e);
throw new ConnectionException(e.getMessage(),e);
}
if (!ft.isDone()) {
ft.cancel(true);
throw new ConnectionException(IdeBundle.message("updates.timeout.error"));
}
return null;
}
protected static void prepareUrl(@NotNull String url) throws ConnectionException {
try {
HttpConfigurable.getInstance().prepareURL(url);
}
catch (Exception e) {
throw new ConnectionException(e);
}
}
protected URL prepareRequestUrl(@NotNull String url) throws ConnectionException {
try {
if (url.startsWith("file:")) {
return new URL(url);
}
return new URL(url + "?" + UpdateChecker.prepareUpdateCheckArgs());
}
catch (Exception e) {
throw new ConnectionException(e);
}
}
}
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