/*
* 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.server.webapp;
import com.caucho.config.ConfigException;
import com.caucho.config.types.PathBuilder;
import com.caucho.server.dispatch.UrlMap;
import com.caucho.util.L10N;
import com.caucho.vfs.Path;
import javax.annotation.PostConstruct;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Configuration for a rewrite-real-path
*/
public class RewriteRealPath {
static final L10N L = new L10N(RewriteRealPath.class);
static final Logger log = Logger.getLogger(RewriteRealPath.class.getName());
private Path _appDir;
private final ArrayList<Program> _programList = new ArrayList<Program>();
// path mapping (old path-mapping)
private UrlMap<String> _pathMapping;
public RewriteRealPath(Path appDir)
{
_appDir = appDir;
}
/**
* Adds a rewrite
*/
public void addRewrite(Rewrite rewrite)
{
_programList.add(rewrite);
}
/**
* Adds a real-path.
*/
public void addRealPath(RealPath realPath)
{
_programList.add(realPath);
}
/**
* Adds a path pattern.
*/
public void addPathPattern(String urlPattern, String realPath)
{
if (_pathMapping == null)
_pathMapping = new UrlMap<String>();
_pathMapping.addMap(urlPattern, realPath);
}
/**
* Adds a path pattern.
*/
public void addPathRegexp(String urlRegexp, String realPath)
{
if (_pathMapping == null)
_pathMapping = new UrlMap<String>();
_pathMapping.addRegexp(urlRegexp, realPath);
}
/**
* Maps the path.
*/
public String mapToRealPath(String uri)
{
for (int i = 0; i < _programList.size(); i++) {
Program program = _programList.get(i);
uri = program.rewrite(uri);
String realPath = program.toRealPath(uri);
if (realPath != null)
return _appDir.lookup(realPath).getNativePath();
}
return pathMappingToRealPath(uri);
}
/**
* Compatibility mapping to real path.
*/
private String pathMappingToRealPath(String uri)
{
if (_pathMapping == null)
return _appDir.lookup("./" + uri).getNativePath();
ArrayList<String> regexpVars = new ArrayList<String>();
String map = _pathMapping.map(uri, regexpVars);
Path path;
if (map == null)
path = _appDir.lookup("./" + uri);
else {
try {
path = PathBuilder.lookupPath(map, regexpVars);
} catch (Exception e) {
log.log(Level.WARNING, e.toString(), e);
path = _appDir.lookup(map);
}
String match = (String) regexpVars.get(0);
String tail = uri.substring(match.length());
// hacks to get the trailing '/' correct
if (uri.endsWith("/") && ! tail.endsWith("/"))
tail = tail + '/';
if (tail.startsWith("/"))
tail = '.' + tail;
if (! tail.equals(""))
path = path.lookup(tail);
}
String nativePath = path.getNativePath();
// server/108j expects case insensitive
/*
if (CaseInsensitive.isCaseInsensitive())
return nativePath.toLowerCase(Locale.ENGLISH);
else
return nativePath;
*/
return nativePath;
}
static class Program {
public String rewrite(String uri)
{
return uri;
}
public String toRealPath(String uri)
{
return null;
}
}
public static class Rewrite extends Program {
private Pattern _regexp;
private String _replacement;
/**
* Sets the regular expression.
*/
public void setRegexp(String regexp)
{
_regexp = Pattern.compile(regexp);
}
/**
* Sets the target.
*/
public void setReplacement(String replacement)
{
_replacement = replacement;
}
/**
* Init
*/
@PostConstruct
public void init()
throws ConfigException
{
if (_regexp == null)
throw new ConfigException(L.l("rewrite needs 'regexp' attribute."));
if (_replacement == null)
throw new ConfigException(L.l("rewrite needs 'replacement' attribute."));
}
public String rewrite(String uri)
{
Matcher matcher = _regexp.matcher(uri);
if (matcher.find()) {
matcher.reset();
return matcher.replaceAll(_replacement);
}
else
return uri;
}
}
public static class RealPath extends Program {
private Pattern _regexp;
private String _target;
/**
* Sets the regular expression.
*/
public void setRegexp(String regexp)
{
_regexp = Pattern.compile(regexp);
}
/**
* Sets the target.
*/
public void setTarget(String target)
{
StringBuilder sb = new StringBuilder();
int length = target.length();
for (int i = 0; i < length; i++) {
char ch = target.charAt(i);
char ch1;
if (ch == '\\' && i + 1 < length
&& ! ('0' <= (ch1 = target.charAt(i + 1)) && ch1 <= '9')) {
sb.append("\\\\");
}
else
sb.append(ch);
}
_target = sb.toString();
}
/**
* Init
*/
@PostConstruct
public void init()
throws ConfigException
{
if (_regexp == null)
throw new ConfigException(L.l("real-path needs 'regexp' attribute."));
if (_target == null)
throw new ConfigException(L.l("real-path needs 'target' attribute."));
}
public String toRealPath(String uri)
{
Matcher matcher = _regexp.matcher(uri);
if (matcher.find()) {
matcher.reset();
return matcher.replaceAll(_target);
}
else
return null;
}
}
}