|
1
29
30 package com.caucho.jstl.el;
31
32 import com.caucho.el.Expr;
33 import com.caucho.jsp.PageContextImpl;
34 import com.caucho.jstl.NameValueTag;
35 import com.caucho.jstl.rt.CoreUrlTag;
36 import com.caucho.util.CharBuffer;
37 import com.caucho.util.L10N;
38
39 import javax.el.ELException;
40 import javax.servlet.http.HttpServletResponse  ;
41 import javax.servlet.jsp.JspException ;
42 import javax.servlet.jsp.tagext.TagSupport ;
43 import java.io.IOException ;
44
45 public class RedirectTag extends TagSupport implements NameValueTag {
46 private static L10N L = new L10N(RedirectTag.class);
47
48 private Expr _valueExpr;
49 private Expr _contextExpr;
50
51 private CharBuffer _url;
52
53
56 public void setURL(Expr value)
57 {
58 _valueExpr = value;
59 }
60
61
64 public void setContext(Expr context)
65 {
66 _contextExpr = context;
67 }
68
69
72 public void addParam(String name, String value)
73 {
74 String encoding = this.pageContext.getResponse().getCharacterEncoding();
75
76 CoreUrlTag.addParam(_url, name, value, encoding);
77 }
78
79 public int doStartTag() throws JspException
80 {
81 try {
82 PageContextImpl pageContext = (PageContextImpl) this.pageContext;
83
84 String value = _valueExpr.evalString(pageContext.getELContext());
85 String context = null;
86
87 if (_contextExpr != null)
88 context = _contextExpr.evalString(pageContext.getELContext());
89
90 _url = UrlTag.normalizeURL(pageContext, value, context);
91
92 return EVAL_BODY_INCLUDE;
93 } catch (ELException e) {
94 throw new JspException (e);
95 }
96 }
97
98 public int doEndTag() throws JspException
99 {
100 String value = UrlTag.encodeURL(pageContext, _url);
101
102 try {
103 HttpServletResponse response;
104 ((HttpServletResponse ) pageContext.getResponse()).sendRedirect(value);
105 } catch (IOException e) {
106 throw new JspException (e);
107 }
108
109 return SKIP_PAGE;
110 }
111 }
112 |
Popular Tags |
Java API By Example, From Geeks To Geeks.