51Degrees Device Detection Java  4.2

Device detection services for 51Degrees Pipeline

servlet/Example.java

Servlet device detection exampleThis example shows how to:

  1. Set up configuration options to add elements to the 51Degrees Pipeline.
    1 <PipelineOptions>
    2  <Elements>
    3  <Element>
    4  <BuildParameters>
    5  <EndPoint>https://cloud.51degrees.com/api/v4</EndPoint>
    6  <!-- Obtain a resource key for free at
    7  https://configure.51degrees.com
    8  Make sure to include the 'BrowserName','BrowserVendor',
    9  'BrowserVersion','HardwareName','HardeareVendor',
    10  'PlatformName','PlatformVendor','PlatformVersion'
    11  properties as they are used by this example. -->
    12  <ResourceKey>!!YOUR_RESOURCE_KEY!!</ResourceKey>
    13  </BuildParameters>
    14  <BuilderName>CloudRequestEngine</BuilderName>
    15  </Element>
    16  <Element>
    17  <BuilderName>DeviceDetectionCloudEngine</BuilderName>
    18  </Element>
    19  </Elements>
    20 </PipelineOptions>

Alternatively, to use the on-premise API with automatic updates enabled, replace the cloud element in the config with the new configuration.

1 <PipelineOptions>
2  <Elements>
3  <Element>
4  <BuildParameters>
5  <AutoUpdate>true</AutoUpdate>
6  <DataFileSystemWatcher>false</DataFileSystemWatcher>SS
7  <CreateTempDataCopy>true</CreateTempDataCopy>
8  <!-- Obtain your own license key and enterprise data file
9  from https://51degrees.com. -->
10  <DataUpdateLicenseKey>[[Your License Key]]</DataUpdateLicenseKey>
11  <DataFile>D:\[[Path to data file]]\51Degrees-EnterpriseV4.1.hash</DataFile>
12  <PerformanceProfile>LowMemory</PerformanceProfile>
13  </BuildParameters>
14  <BuilderName>DeviceDetectionHashEngineBuilder</BuilderName>
15  </Element>
16  </Elements>
17 </PipelineOptions>
  1. Configure the filter and map it to be run for all URLs.
    1 <web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
    2  ...
    3  <filter>
    4  <filter-name>Pipeline</filter-name>
    5  <filter-class>fiftyone.pipeline.web.PipelineFilter</filter-class>
    6  <init-param>
    7  <param-name>clientside-properties-enabled</param-name>
    8  <param-value>true</param-value>
    9  </init-param>
    10  </filter>
    11  <filter-mapping>
    12  <filter-name>Pipeline</filter-name>
    13  <url-pattern>/*</url-pattern>
    14  </filter-mapping>
    15  ...
  2. Add the FlowDataProvider to the servlet.
    public class Example extends HttpServlet {
    FlowDataProviderCore flowDataProvider = new FlowDataProviderCore.Default();
    ...
  3. User the results contained in the flow data to display something on a page, and optionally add the client-side code to improve detection accuracy on devices like iPhones.
    public class Example extends HttpServlet {
    ...
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws Exception {
    FlowData data = flowDataProvider.getFlowData(request);
    DeviceData device = data.get(DeviceData.class);
    response.setContentType("text/html;charset=UTF-8");
    try (PrintWriter out = response.getWriter()) {
    out.println("<!DOCTYPE html>");
    out.println("<html>");
    out.println("<head>");
    out.println("<title>Servlet Example</title>");
    out.println("</head>");
    out.println("<body>");
    out.println("<script src=\"/pipeline.web.examples.servlet/51Degrees.core.js\"></script>");
    out.println("<p>Browser : " +
    device.getBrowserVendor() + " " + device.getBrowserName() + " " + device.getBrowserVersion() +
    "</p>");
    out.println("<p>Device : " +
    device.getHardwareVendor() + " " + device.getHardwareName() +
    "</p>");
    out.println("<p>OS : " +
    device.getPlatformVendor() + " " + device.getPlatformName() + " " + device.getPlatformVersion() +
    "</p>");
    out.println("</body>");
    out.println("</html>");
    }
    }
    ...
    }

Servlet

/* *********************************************************************
* This Original Work is copyright of 51 Degrees Mobile Experts Limited.
* Copyright 2019 51 Degrees Mobile Experts Limited, 5 Charlotte Close,
* Caversham, Reading, Berkshire, United Kingdom RG4 7BY.
*
* This Original Work is licensed under the European Union Public Licence (EUPL)
* v.1.2 and is subject to its terms as set out below.
*
* If a copy of the EUPL was not distributed with this file, You can obtain
* one at https://opensource.org/licenses/EUPL-1.2.
*
* The 'Compatible Licences' set out in the Appendix to the EUPL (as may be
* amended by the European Commission) shall be deemed incompatible for
* the purposes of the Work and the provisions of the compatibility
* clause in Article 5 of the EUPL shall not apply.
*
* If using the Work as, or as part of, a network application, by
* including the attribution notice(s) required under Article 5 of the EUPL
* in the end user terms of the application under an appropriate heading,
* such notice(s) shall fulfill the requirements of that article.
* ********************************************************************* */
package fiftyone.pipeline.web.examples.servlet;
import fiftyone.devicedetection.shared.DeviceData;
import fiftyone.pipeline.core.data.FlowData;
import fiftyone.pipeline.engines.data.AspectPropertyValue;
import fiftyone.pipeline.engines.exceptions.NoValueException;
import fiftyone.pipeline.jsonbuilder.data.JsonBuilderData;
import fiftyone.pipeline.web.services.FlowDataProviderCore;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import static fiftyone.pipeline.util.StringManipulation.stringJoin;
import static fiftyone.pipeline.web.examples.servlet.ExampleHelper.tryGet;
public class Example extends HttpServlet {
FlowDataProviderCore flowDataProvider = new FlowDataProviderCore.Default();
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws Exception {
FlowData data = flowDataProvider.getFlowData(request);
DeviceData device = data.get(DeviceData.class);
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet Example</title>");
out.println("</head>");
out.println("<body>");
out.println("<script src=\"/pipeline.web.examples.servlet/51Degrees.core.js\"></script>");
AspectPropertyValue<String> hardwareVendor =
tryGet(this, () -> device.getHardwareVendor());
AspectPropertyValue<List<String>> hardwareName =
tryGet(this, () -> device.getHardwareName());
AspectPropertyValue<String> deviceType =
tryGet(this, () ->device.getDeviceType());
AspectPropertyValue<String> platformVendor =
tryGet(this, () -> device.getPlatformVendor());
AspectPropertyValue<String> platformName =
tryGet(this, () -> device.getPlatformName());
AspectPropertyValue<String> platformVersion =
tryGet(this, () -> device.getPlatformVersion());
AspectPropertyValue<String> browserVendor =
tryGet(this, () -> device.getBrowserVendor());
AspectPropertyValue<String> browserName =
tryGet(this, () -> device.getBrowserName());
AspectPropertyValue<String> browserVersion =
tryGet(this, () -> device.getBrowserVersion());
out.println("<h2>Example</h2>\n" +
"\n" +
"<div id=\"content\">\n" +
" <p>\n" +
" Hardware Vendor: " + (hardwareVendor.hasValue() ? hardwareVendor.getValue() : "Unknown " + hardwareVendor.getNoValueMessage()) + "<br />\n" +
" Hardware Name: " + (hardwareName.hasValue() ? stringJoin(hardwareName.getValue(), ",") : "Unknown " + hardwareName.getNoValueMessage()) +"<br />\n" +
" Device Type: " + (deviceType.hasValue() ? deviceType.getValue() : "Unknown " + deviceType.getNoValueMessage()) + "<br />\n" +
" Platform Vendor: " + (platformVendor.hasValue() ? platformVendor.getValue() : "Unknown " + platformVendor.getNoValueMessage()) + "<br />\n" +
" Platform Name: " + (platformName.hasValue() ? platformName.getValue() : "Unknown " + platformName.getNoValueMessage()) + "<br />\n" +
" Platform Version: " + (platformVersion.hasValue() ? platformVersion.getValue() : "Unknown " + platformVersion.getNoValueMessage()) + "<br />\n" +
" Browser Vendor: " + (browserVendor.hasValue() ? browserVendor.getValue() : "Unknown " + browserVendor.getNoValueMessage()) + "<br />\n" +
" Browser Name: " + (browserName.hasValue() ? browserName.getValue() : "Unknown " + browserName.getNoValueMessage()) + "<br />\n" +
" Browser Version: " + (browserVersion.hasValue() ? browserVersion.getValue() : "Unknown " + browserVersion.getNoValueMessage()) + "\n" +
" </p>\n" +
"</div>\n" +
"\n" +
"<script>\n" +
" // This function will fire when the JSON data object is updated \n" +
" // with information from the server.\n" +
" // The sequence is:\n" +
" // 1. Response contains JavaScript property 'getLatitude' that gets executed on the client\n" +
" // 2. This triggers another call to the webserver that passes the location as evidence\n" +
" // 3. The web server responds with new JSON data that contains the hemisphere based on the location.\n" +
" // 4. The JavaScript integrates the new JSON data and fires the onChange callback below.\n" +
" window.onload = function () {\n" +
" fod.complete(function (data) {\n" +
" var para = document.createElement(\"p\");\n" +
" var br = document.createElement(\"br\");\n" +
" var text = document.createTextNode(\"Updated information from client-side evidence:\");\n" +
" para.appendChild(text);\n" +
" para.appendChild(br);\n" +
" text = document.createTextNode(\"Hardware Name: \" + data.device.hardwarename.join(\",\"));\n" +
" br = document.createElement(\"br\");\n" +
" para.appendChild(text);\n" +
" para.appendChild(br);\n" +
" text = document.createTextNode(\"Screen width (pixels): \" + data.device.screenpixelswidth);\n" +
" br = document.createElement(\"br\");\n" +
" para.appendChild(text);\n" +
" para.appendChild(br);\n" +
" text = document.createTextNode(\"Screen height (pixels): \" + data.device.screenpixelsheight);\n" +
" br = document.createElement(\"br\");\n" +
" para.appendChild(text);\n" +
" para.appendChild(br);\n" +
"\n" +
" var element = document.getElementById(\"content\");\n" +
" element.appendChild(para);\n" +
" });\n" +
" }\n" +
"</script>");
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException {
try {
processRequest(request, response);
} catch (ServletException se) {
throw se;
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}

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