/*
* Copyright (c) 2010, 2011 Mashery, Inc. All Rights Reserved.
*
* 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.mashery.examples.api.server.hotwire;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.bind.JAXB;
import org.codehaus.jackson.map.ObjectMapper;
import com.mashery.examples.api.client.hotwire.HotwireResponse;
@SuppressWarnings("serial")
public class HotelDealsServlet extends HttpServlet {
private String hotwireEndpoint;
private String hotwireApikey;
@Override
public void init() throws ServletException {
super.init();
hotwireEndpoint = getInitParameter("hotwire.endpoint");
hotwireApikey = getInitParameter("hotwire.apikey");
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// create Active Search service URL
StringBuilder buf = new StringBuilder(hotwireEndpoint);
buf.append("?apikey=");
buf.append(URLEncoder.encode(hotwireApikey, "UTF-8"));
String qs = req.getQueryString();
if (qs != null)
buf.append('&').append(qs);
URL url = new URL(buf.toString());
// call Hotwire Hotel Deals
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
int rc = conn.getResponseCode();
String charset = getContentCharset(conn);
if (rc != HttpURLConnection.HTTP_OK) {
resp.sendError(rc, conn.getResponseMessage());
return;
}
// parse XML response
InputStream in = conn.getInputStream();
InputStreamReader ir = charset == null ? new InputStreamReader(in) : new InputStreamReader(in, charset);
HotwireResponse response = JAXB.unmarshal(ir, HotwireResponse.class);
// return JSON response
resp.setContentType("application/json");
ObjectMapper mapper = new ObjectMapper();
mapper.writeValue(resp.getWriter(), response);
resp.flushBuffer();
}
private String getContentCharset(HttpURLConnection conn) {
String charset = null;
String ct = conn.getContentType();
if (ct != null) {
String[] parts = ct.split(";");
for (int i = 1; i < parts.length; ++i) {
if (parts[i].trim().toLowerCase().startsWith("charset")) {
String[] pair = parts[i].split("=", 2);
if (pair[0].trim().equalsIgnoreCase("charset") && pair.length > 1) {
charset = pair[1].trim();
}
}
}
}
return charset;
}
}