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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.facet.frameworks;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.JDOMUtil;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.util.containers.hash.HashMap;
import org.jdom.Document;
import org.jdom.Element;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Map;
public abstract class SettingsConnectionService {
private static final Logger LOG = Logger.getInstance("com.intellij.facet.frameworks.SettingsConnectionService");
protected static final String SERVICE_URL_ATTR_NAME = "url";
private static final String myAgentID = "IntelliJ IDEA";
private Map<String, String> myAttributesMap;
@NotNull
protected String[] getAttributeNames() {
return new String[] {SERVICE_URL_ATTR_NAME};
}
private final String mySettingsUrl;
@Nullable private final String myDefaultServiceUrl;
protected SettingsConnectionService(@NotNull String settingsUrl, @Nullable String defaultServiceUrl) {
mySettingsUrl = settingsUrl;
myDefaultServiceUrl = defaultServiceUrl;
}
public String getSettingsUrl() {
return mySettingsUrl;
}
@Nullable
public String getDefaultServiceUrl() {
return myDefaultServiceUrl;
}
@Nullable
private Map<String, String> readSettings(String... attributes) {
Map<String, String> settings = new HashMap<String, String>();
try {
final URL url = new URL(getSettingsUrl());
final InputStream is = getStream(url);
final Document document = JDOMUtil.loadDocument(is);
final Element root = document.getRootElement();
for (String s : attributes) {
final String attributeValue = root.getAttributeValue(s);
if (StringUtil.isNotEmpty(attributeValue)) {
settings.put(s, attributeValue);
}
}
}
catch (MalformedURLException e) {
LOG.error(e);
}
catch (IOException e) {
// no route to host, unknown host, etc.
}
catch (Exception e) {
LOG.error(e);
}
return settings;
}
private static InputStream getStream(URL url) throws IOException {
final URLConnection connection = url.openConnection();
if (connection instanceof HttpURLConnection) {
connection.setRequestProperty("User-agent", myAgentID);
}
return connection.getInputStream();
}
@Nullable
public String getServiceUrl() {
final String serviceUrl = getSettingValue(SERVICE_URL_ATTR_NAME);
return serviceUrl == null ? getDefaultServiceUrl() : serviceUrl;
}
@Nullable
protected String getSettingValue(@NotNull String attributeValue) {
if (myAttributesMap == null) {
myAttributesMap = readSettings(getAttributeNames());
}
return myAttributesMap != null ? myAttributesMap.get(attributeValue) : null;
}
}
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