/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jstl.el;
import com.caucho.el.Expr;
import com.caucho.jsp.PageContextImpl;
import com.caucho.jstl.NameValueTag;
import com.caucho.util.CharBuffer;
import com.caucho.util.L10N;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.TagSupport;
import java.io.IOException;
public class UrlTag extends TagSupport implements NameValueTag {
private static final L10N L = new L10N(ImportTag.class);
private Expr _valueExpr;
private Expr _contextExpr;
private String _var;
private String _scope;
private CharBuffer _url;
/**
* Sets the URL to be imported.
*/
public void setValue(Expr value)
{
_valueExpr = value;
}
/**
* Sets the external context for the import.
*/
public void setContext(Expr context)
{
_contextExpr = context;
}
/**
* Sets the variable for the import.
*/
public void setVar(String var)
{
_var = var;
}
/**
* Sets the scope for the result variable for the output.
*/
public void setScope(String scope)
{
_scope = scope;
}
/**
* Adds a parameter.
*/
public void addParam(String name, String value)
{
String encoding = this.pageContext.getResponse().getCharacterEncoding();
com.caucho.jstl.rt.CoreUrlTag.addParam(_url, name, value, encoding);
}
public int doStartTag() throws JspException
{
PageContextImpl pageContext = (PageContextImpl) this.pageContext;
String value = _valueExpr.evalString(pageContext.getELContext());
String context = null;
if (_contextExpr != null)
context = _contextExpr.evalString(pageContext.getELContext());
_url = normalizeURL(pageContext, value, context);
return EVAL_BODY_INCLUDE;
}
public int doEndTag() throws JspException
{
PageContextImpl pageContext = (PageContextImpl) this.pageContext;
String value = encodeURL(pageContext, _url);
try {
if (_var == null) {
JspWriter out = pageContext.getOut();
out.print(value);
}
else
CoreSetTag.setValue(pageContext, _var, _scope, value);
} catch (IOException e) {
throw new JspException(e);
}
return EVAL_PAGE;
}
public static CharBuffer normalizeURL(PageContext pageContext,
String url, String context)
throws JspException
{
if (url == null)
url = "";
CharBuffer value = new CharBuffer();
int slash = url.indexOf('/');
int colon = url.indexOf(':');
if (colon > 0 && colon < slash) {
value.append(url);
}
else if (slash == 0) {
HttpServletRequest request;
request = (HttpServletRequest) pageContext.getRequest();
if (context != null) {
value.append(context);
if (context.endsWith("/"))
value.append(url, 1, url.length() - 1);
else
value.append(url);
}
else {
value.append(request.getContextPath());
value.append(url);
}
}
else {
if (context != null) {
value.append(context);
value.append(url);
}
else
value.append(url);
}
return value;
}
public static String encodeURL(PageContext pageContext, CharBuffer url)
{
String value = url.toString();
int colon = value.indexOf(':');
int slash = value.indexOf('/');
if (colon < slash && slash > 0)
return value;
else
return ((HttpServletResponse) pageContext.getResponse()).encodeURL(value);
/*
if (value.startsWith("/"))
return ((HttpServletResponse) pageContext.getResponse()).encodeURL(value);
else
return value;
*/
}
}