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/* |
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$Id $ |
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Copyright (C) 2010 Nicklas Nordborg |
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This file is part of BASE - BioArray Software Environment. |
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Available at http://base.thep.lu.se/ |
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BASE is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 3 |
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of the License, or (at your option) any later version. |
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|
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BASE is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with BASE. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package net.sf.basedb.util; |
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|
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import java.io.IOException; |
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import java.util.Date; |
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import java.util.Locale; |
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import org.apache.commons.lang3.time.FastDateFormat; |
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import org.apache.http.Header; |
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import org.apache.http.HttpResponse; |
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import org.apache.http.impl.client.CloseableHttpClient; |
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import nl.basjes.parse.useragent.UserAgent; |
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import nl.basjes.parse.useragent.UserAgentAnalyzer; |
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/** |
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Useful methods related to HTTP stuff in general and |
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Apache HTTP components in particular. |
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|
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@author Nicklas |
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@since 2.16 |
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@base.modified $Date$ |
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*/ |
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public class HttpUtil |
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{ |
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private static final FastDateFormat HTTP_DATE_FORMAT = FastDateFormat.getInstance("EEE, d MMM yyyy HH:mm:ss z", Locale.ENGLISH); |
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private static UserAgentAnalyzer userAgentAnalyzer; |
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|
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/** |
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Get the content length from the headers in the response. |
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@param response The response from a HTTP request |
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@return The value of the "Content-Length" header or -1 if not present |
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if it is unparsable |
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*/ |
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public static long getContentLength(HttpResponse response) |
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{ |
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return getLong(response, "Content-Length", -1L); |
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} |
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|
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/** |
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Get the date the content was last modified from the headers |
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in the response. |
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@param response The response from a HTTP request |
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@return The value of the "Last-Modified" header or null if not present |
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if it is unparsable |
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*/ |
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public static Date getLastModified(HttpResponse response) |
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{ |
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return getDate(response, "Last-Modified", null); |
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} |
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|
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/** |
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Get the content type of the content from the headers |
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in the response. |
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@param response The response from a HTTP request |
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@return The value of the "Content-Type" header or null if not present |
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if it is unparsable |
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*/ |
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public static String getContentType(HttpResponse response) |
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{ |
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return getString(response, "Content-Type", null); |
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} |
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|
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|
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public static String getString(HttpResponse response, String header, String defaultValue) |
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{ |
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String result = defaultValue; |
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Header h = response.getFirstHeader(header); |
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if (h != null) result = h.getValue(); |
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return result; |
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} |
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|
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public static Long getLong(HttpResponse response, String header, Long defaultValue) |
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{ |
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Long result = defaultValue; |
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Header h = response.getFirstHeader(header); |
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if (h != null) result = Values.getLong(h.getValue(), defaultValue); |
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return result; |
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} |
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|
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public static Date getDate(HttpResponse response, String header, Date defaultValue) |
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{ |
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Date result = defaultValue; |
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Header h = response.getFirstHeader(header); |
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if (h != null) |
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{ |
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try |
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{ |
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result = HTTP_DATE_FORMAT.parse(h.getValue()); |
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} |
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catch (Exception ex) |
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{} |
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} |
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return result; |
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} |
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|
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/** |
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Safely shuts down a http client and it's connection manager |
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without trowing an exception. Useful to use in try-catch-finally |
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clauses. |
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*/ |
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public static void shutdown(CloseableHttpClient client) |
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{ |
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try |
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{ |
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client.close(); |
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} |
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catch (IOException ex) |
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{} |
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catch (RuntimeException ex) |
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{} |
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} |
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|
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/** |
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Parse the User-Agent string from a HTTP request and return |
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information about what it actually means. |
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@see <a href="https://github.com/nielsbasjes/yauaa">https://github.com/nielsbasjes/yauaa</a> |
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@since 3.12 |
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*/ |
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public static synchronized UserAgent analyzeUserAgent(String userAgent) |
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{ |
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if (userAgentAnalyzer == null) |
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{ |
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userAgentAnalyzer = UserAgentAnalyzer.newBuilder().build(); |
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} |
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return userAgentAnalyzer.parse(userAgent); |
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} |
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|
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/** |
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Get a summary of the user agent: |
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|
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* Browser with major version |
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* Operating system with version |
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* Typy of device (eg. desktop, phone, etc.) |
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|
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@since 3.12 |
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*/ |
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public static String getSummaryOfUserAgent(String userAgent) |
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{ |
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UserAgent ua = analyzeUserAgent(userAgent); |
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return ua == null ? null : ua.getValue("AgentNameVersionMajor") + |
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" on " + ua.getValue("OperatingSystemNameVersion") + |
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" (" + ua.getValue("DeviceName") + ")"; |
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} |
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|
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} |