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/*
* Juick
* Copyright (C) 2008-2011, Ugnich Anton
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.www;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Optional;
/**
*
* @author Ugnich Anton
*/
public class Utils {
private static final Logger logger = LoggerFactory.getLogger(Utils.class);
public static String getCookie(HttpServletRequest request, String name) {
Cookie cookies[] = request.getCookies();
if (cookies != null) {
return Arrays.stream(cookies).filter(c ->
c.getName().equals(name)).findAny().map(Cookie::getValue).orElse(null);
}
return null;
}
public static void sendTemporaryRedirect(HttpServletResponse response, String location) {
response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
response.setHeader("Location", location);
}
public static void sendPermanentRedirect(HttpServletResponse response, String location) {
response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
response.setHeader("Location", location);
}
public static String getPartFilename(Part part) {
for (String cd : part.getHeader("content-disposition").split(";")) {
if (cd.trim().startsWith("filename")) {
String filename = cd.substring(cd.indexOf('=') + 1).trim().replace("\"", StringUtils.EMPTY);
return filename.substring(filename.lastIndexOf('/') + 1).substring(filename.lastIndexOf('\\') + 1); // MSIE fix.
}
}
return null;
}
public static void replyJSON(HttpServletRequest request, HttpServletResponse response, String json) throws IOException {
response.setContentType("application/json; charset=UTF-8");
response.setHeader("Access-Control-Allow-Origin", "*");
String callback = request.getParameter("callback");
if (callback != null && (callback.length() > 64 || !callback.matches("[a-zA-Z0-9\\-\\_]+"))) {
callback = null;
}
PrintWriter out = response.getWriter();
try {
if (callback != null) {
out.print(callback + "(");
out.print(json);
out.print(")");
} else {
out.print(json);
}
} finally {
out.close();
}
}
public static String encodeSphinx(String str) {
return str.replaceAll("@", "\\\\@");
}
public static String fetchURL(String url) {
try {
URLConnection c = new URL(url).openConnection();
return IOUtils.toString(c.getInputStream(), StandardCharsets.UTF_8);
} catch (IOException e) {
logger.warn("fetchURL", e);
return null;
}
}
/**
* Returns the viewName to return for coming back to the sender url
*
* @param request Instance of {@link HttpServletRequest} or use an injected instance
* @return Optional with the view name. Recomended to use an alternativa url with
* {@link Optional#orElse(java.lang.Object)}
*/
public static Optional<String> getPreviousPageByRequest(HttpServletRequest request)
{
return Optional.ofNullable(request.getHeader("Referer")).map(requestUrl -> "redirect:" + requestUrl);
}
}
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