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1
16 package dlog4j.proxy;
17
18 import java.lang.reflect.InvocationHandler  ;
19 import java.lang.reflect.InvocationTargetException ;
20 import java.lang.reflect.Method ;
21 import java.lang.reflect.Proxy ;
22 import java.util.HashMap ;
23 import java.util.Iterator ;
24 import java.util.Map ;
25
26 import javax.servlet.ServletException ;
27 import javax.servlet.ServletRequest ;
28 import javax.servlet.http.HttpServletRequest ;
29
30
31
36 public class RequestProxy implements InvocationHandler
37 {
38 final static String METHOD_GP = "getParameter";
39 final static String METHOD_GPM = "getParameterMap";
40 final static String METHOD_GPN = "getParameterNames";
41 final static String METHOD_GPV = "getParameterValues";
42
43 final static String ENC_8859_1 = "8859_1";
44 final static String ENC_UTF_8 = "UTF-8";
45
46 protected String encoding;
47
48 public String getEncoding() {
49 return encoding;
50 }
51 public void setEncoding(String encoding) {
52 this.encoding = encoding;
53 }
54
55 private ServletRequest req;
56
57
64 public final static RequestProxy getProxy(ServletRequest req, String encoding) throws ServletException {
65 return new RequestProxy(req, encoding);
66 }
67
68 private RequestProxy(ServletRequest req, String encoding){
69 this.req = req;
70 this.encoding = encoding;
71 }
72
73
76 public Object invoke(Object proxy, Method m, Object [] args) throws Throwable {
77 Object obj = null;
79 String encode = (encoding==null)?ENC_UTF_8:encoding;
80 try{
81 obj = m.invoke(req, args);
82 if(obj!=null){
83 String mn = m.getName();
84 if(METHOD_GP.equals(mn)){
85 String value = (String )obj;
86 obj = new String (value.getBytes(ENC_8859_1),encode);
87 }
88 else
89 if(METHOD_GPV.equals(mn)){
90 String [] values = (String [])obj;
91 for(int i=0;i<values.length;i++)
92 values[i] = new String (values[i].getBytes(ENC_8859_1),encode);
93 obj = values;
94 }
95 else
96 if(METHOD_GPM.equals(mn)){
97 Map params = (Map )obj;
98 HashMap new_params = new HashMap ();
99 Iterator iter = params.keySet().iterator();
100 while(iter.hasNext()){
101 String key = (String )iter.next();
102 Object oValue = params.get(key);
103 if(oValue.getClass().isArray()){
104 String [] values = (String [])params.get(key);
105 for(int i=0;i<values.length;i++)
106 values[i] = new String (values[i].getBytes(ENC_8859_1),encode);
107 new_params.put(key, values);
108 }
109 else{
110 String value = (String )params.get(key);
111 String new_value = (value!=null)?
112 new String (value.getBytes(ENC_8859_1),encode):null;
113 new_params.put(key,new_value);
114 }
115 }
116 }
117 }
118 }catch(InvocationTargetException e){
119 throw e.getTargetException();
120 }
121 return obj;
122 }
123
124
127 public HttpServletRequest getInstance(){
128 return (HttpServletRequest )Proxy.newProxyInstance(
129 req.getClass().getClassLoader(),
130 request_cls,
131 this);
132 }
133 final static Class [] request_cls = new Class []{HttpServletRequest .class};
134 } |
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