Of Stack

Determine the phone type according to ES0en ES1en and jump to the corresponding app download page

  • 2020-06-07 05:14:51
  • OfStack

The implementation works by detecting USER-ES2en, the header of the browser, and then determining the client type based on the regular expression.

If none of them match, the Fallback fallback strategy is to display the corresponding page and let the user choose.
APP is suitable for downloading by using 2-d code scanning:

JSP version of the code as shown below: other server version please Baidu search. 


<%@page import="java.util.regex.Matcher"%> 
<%@page import="java.util.regex.Pattern"%> 
<%@ page language="java" pageEncoding="UTF-8"%> 
<%! 
// \b  It's the word boundary ( Two attached ( Alphabetic characters   with   Non-alphabetic character )  The logical interval between ), Strings are transcoded at compile time 1 time , So it is  "\\b" 
// \B  Is the logical interval within the word ( The logical interval between two consecutive alphabetic characters ) 

String androidReg = "\\bandroid|Nexus\\b"; 
String iosReg = "ip(hone|od|ad)"; 

Pattern androidPat = Pattern.compile(androidReg, Pattern.CASE_INSENSITIVE); 
Pattern iosPat = Pattern.compile(iosReg, Pattern.CASE_INSENSITIVE); 

public boolean likeAndroid(String userAgent){ 
if(null == userAgent){ 
userAgent = ""; 
} 
//  matching  
Matcher matcherAndroid = androidPat.matcher(userAgent); 
if(matcherAndroid.find()){ 
return true; 
} else { 
return false; 
} 
} 
public boolean likeIOS(String userAgent){ 
if(null == userAgent){ 
userAgent = ""; 
} 
//  matching  
Matcher matcherIOS = iosPat.matcher(userAgent); 
if(matcherIOS.find()){ 
return true; 
} else { 
return false; 
} 
} 

%> 
<% 
String path = request.getContextPath(); 
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 

// 
String userAgent = request.getHeader( "USER-AGENT" ).toLowerCase(); 
System.out.println("userAgent: "+userAgent); 
if(null == userAgent){ 
userAgent = ""; 
} 
if(likeAndroid(userAgent)){ 
System.out.println("likeAndroid: "+true); 
response.sendRedirect("http://m.iyhjy.com/download.jsp?platform=android"); 
return; 
//request.getRequestDispatcher("/download.html").forward(request,response); 
} else if(likeIOS(userAgent)){ 
System.out.println("likeIOS: "+true); 
response.sendRedirect("http://itunes.apple.com/us/app/id714751061"); 
return; 
//request.getRequestDispatcher("/index.html").forward(request,response); 
} 
%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"> 
<title> Download client  -  Eternal memory </title> 
<link href="css/style.css" rel="stylesheet" type="text/css" /> 
</head> 

<body> 
<div class="p_down"> 
<div> 
<a href="index.html"> 
<img src="images/p_logo.png" class="p_logo" /> 
</a> 
</div> 

<a href="itms-services://?action=download-manifest&url=http://m.iyhjy.com/upload/client/yhjyios.plist" class="apple download"><img src="images/p_down_apple.png" /></a> 
<a href="http://m.iyhjy.com/download.jsp?platform=android" class="download"><img src="images/p_down_and.png" /></a> 

</div> 
</body> 
</html>
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