/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.streams.sysomos.util;
import org.apache.streams.sysomos.SysomosException;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Provides utilities for working with Sysomos.
*/
public class SysomosUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(SysomosUtils.class);
public static final Pattern CODE_PATTERN = Pattern.compile("code: ([0-9]+)");
public static final DateTimeFormatter SYSOMOS_DATE_FORMATTER = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss'Z'").withZoneUTC();
private SysomosUtils() {}
/**
* Queries the sysomos URL and provides the response as a String.
*
* @param url the Sysomos URL to query
* @return valid XML String
*/
public static String queryUrl(URL url) {
try {
HttpURLConnection cn = (HttpURLConnection) url.openConnection();
cn.setRequestMethod("GET");
cn.addRequestProperty("Content-Type", "text/xml;charset=UTF-8");
cn.setDoInput(true);
cn.setDoOutput(false);
StringWriter writer = new StringWriter();
IOUtils.copy(new InputStreamReader(cn.getInputStream()), writer);
writer.flush();
String xmlResponse = writer.toString();
if (StringUtils.isEmpty(xmlResponse)) {
throw new SysomosException("XML Response from Sysomos was empty : "
+ xmlResponse
+ "\n"
+ cn.getResponseMessage(),
cn.getResponseCode());
}
return xmlResponse;
} catch (IOException ex) {
LOGGER.error("Error executing request : {}", ex, url.toString());
String message = ex.getMessage();
Matcher match = CODE_PATTERN.matcher(message);
if (match.find()) {
int errorCode = Integer.parseInt(match.group(1));
throw new SysomosException(message, ex, errorCode);
} else {
throw new SysomosException(ex.getMessage(), ex);
}
}
}
}