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//
// ========================================================================
// Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.http;
import java.util.AbstractSet;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import org.eclipse.jetty.util.ArrayTernaryTrie;
import org.eclipse.jetty.util.IncludeExclude;
import org.eclipse.jetty.util.Predicate;
import org.eclipse.jetty.util.Trie;
import org.eclipse.jetty.util.URIUtil;
/* ------------------------------------------------------------ */
/** URI path map to Object.
* This mapping implements the path specification recommended
* in the 2.2 Servlet API.
*
* Path specifications can be of the following forms:
* /foo/bar - an exact path specification.
* /foo/* - a prefix path specification (must end '/*').
* *.ext - a suffix path specification.
* / - the default path specification.
* "" - the / path specification
*
* Matching is performed in the following order
* Exact match.
* Longest prefix match.
* Longest suffix match.
* default.
*
* Multiple path specifications can be mapped by providing a list of
* specifications. By default this class uses characters ":," as path
* separators, unless configured differently by calling the static
* method @see PathMap#setPathSpecSeparators(String)
*
* Special characters within paths such as '?� and ';' are not treated specially
* as it is assumed they would have been either encoded in the original URL or
* stripped from the path.
*
* This class is not synchronized. If concurrent modifications are
* possible then it should be synchronized at a higher level.
*
*
*/
public class PathMap extends HashMap
{
/* ------------------------------------------------------------ */
private static String __pathSpecSeparators = ":,";
/* ------------------------------------------------------------ */
/** Set the path spec separator.
* Multiple path specification may be included in a single string
* if they are separated by the characters set in this string.
* By default this class uses ":," characters as path separators.
* @param s separators
*/
public static void setPathSpecSeparators(String s)
{
__pathSpecSeparators=s;
}
/* --------------------------------------------------------------- */
Trie> _prefixMap=new ArrayTernaryTrie<>(false);
Trie> _suffixMap=new ArrayTernaryTrie<>(false);
final Map> _exactMap=new HashMap<>();
List> _defaultSingletonList=null;
MappedEntry _prefixDefault=null;
MappedEntry _default=null;
boolean _nodefault=false;
/* --------------------------------------------------------------- */
public PathMap()
{
this(11);
}
/* --------------------------------------------------------------- */
public PathMap(boolean noDefault)
{
this(11, noDefault);
}
/* --------------------------------------------------------------- */
public PathMap(int capacity)
{
this(capacity, false);
}
/* --------------------------------------------------------------- */
private PathMap(int capacity, boolean noDefault)
{
super(capacity);
_nodefault=noDefault;
}
/* --------------------------------------------------------------- */
/** Construct from dictionary PathMap.
*/
public PathMap(Map m)
{
putAll(m);
}
/* --------------------------------------------------------------- */
/** Add a single path match to the PathMap.
* @param pathSpec The path specification, or comma separated list of
* path specifications.
* @param object The object the path maps to
*/
@Override
public O put(String pathSpec, O object)
{
if ("".equals(pathSpec.trim()))
{
MappedEntry entry = new MappedEntry<>("",object);
entry.setMapped("");
_exactMap.put("", entry);
return super.put("", object);
}
StringTokenizer tok = new StringTokenizer(pathSpec,__pathSpecSeparators);
O old =null;
while (tok.hasMoreTokens())
{
String spec=tok.nextToken();
if (!spec.startsWith("/") && !spec.startsWith("*."))
throw new IllegalArgumentException("PathSpec "+spec+". must start with '/' or '*.'");
old = super.put(spec,object);
// Make entry that was just created.
MappedEntry entry = new MappedEntry<>(spec,object);
if (entry.getKey().equals(spec))
{
if (spec.equals("/*"))
_prefixDefault=entry;
else if (spec.endsWith("/*"))
{
String mapped=spec.substring(0,spec.length()-2);
entry.setMapped(mapped);
while (!_prefixMap.put(mapped,entry))
_prefixMap=new ArrayTernaryTrie<>((ArrayTernaryTrie>)_prefixMap,1.5);
}
else if (spec.startsWith("*."))
{
String suffix=spec.substring(2);
while(!_suffixMap.put(suffix,entry))
_suffixMap=new ArrayTernaryTrie<>((ArrayTernaryTrie>)_suffixMap,1.5);
}
else if (spec.equals(URIUtil.SLASH))
{
if (_nodefault)
_exactMap.put(spec,entry);
else
{
_default=entry;
_defaultSingletonList=Collections.singletonList(_default);
}
}
else
{
entry.setMapped(spec);
_exactMap.put(spec,entry);
}
}
}
return old;
}
/* ------------------------------------------------------------ */
/** Get object matched by the path.
* @param path the path.
* @return Best matched object or null.
*/
public O match(String path)
{
MappedEntry entry = getMatch(path);
if (entry!=null)
return entry.getValue();
return null;
}
/* --------------------------------------------------------------- */
/** Get the entry mapped by the best specification.
* @param path the path.
* @return Map.Entry of the best matched or null.
*/
public MappedEntry getMatch(String path)
{
if (path==null)
return null;
int l=path.length();
MappedEntry entry=null;
//special case
if (l == 1 && path.charAt(0)=='/')
{
entry = _exactMap.get("");
if (entry != null)
return entry;
}
// try exact match
entry=_exactMap.get(path);
if (entry!=null)
return entry;
// prefix search
int i=l;
final Trie> prefix_map=_prefixMap;
while(i>=0)
{
entry=prefix_map.getBest(path,0,i);
if (entry==null)
break;
String key = entry.getKey();
if (key.length()-2>=path.length() || path.charAt(key.length()-2)=='/')
return entry;
i=key.length()-3;
}
// Prefix Default
if (_prefixDefault!=null)
return _prefixDefault;
// Extension search
i=0;
final Trie> suffix_map=_suffixMap;
while ((i=path.indexOf('.',i+1))>0)
{
entry=suffix_map.get(path,i+1,l-i-1);
if (entry!=null)
return entry;
}
// Default
return _default;
}
/* --------------------------------------------------------------- */
/** Get all entries matched by the path.
* Best match first.
* @param path Path to match
* @return List of Map.Entry instances key=pathSpec
*/
public List> getMatches(String path)
{
MappedEntry entry;
List> entries=new ArrayList<>();
if (path==null)
return entries;
if (path.length()==0)
return _defaultSingletonList;
// try exact match
entry=_exactMap.get(path);
if (entry!=null)
entries.add(entry);
// prefix search
int l=path.length();
int i=l;
final Trie> prefix_map=_prefixMap;
while(i>=0)
{
entry=prefix_map.getBest(path,0,i);
if (entry==null)
break;
String key = entry.getKey();
if (key.length()-2>=path.length() || path.charAt(key.length()-2)=='/')
entries.add(entry);
i=key.length()-3;
}
// Prefix Default
if (_prefixDefault!=null)
entries.add(_prefixDefault);
// Extension search
i=0;
final Trie> suffix_map=_suffixMap;
while ((i=path.indexOf('.',i+1))>0)
{
entry=suffix_map.get(path,i+1,l-i-1);
if (entry!=null)
entries.add(entry);
}
// root match
if ("/".equals(path))
{
entry=_exactMap.get("");
if (entry!=null)
entries.add(entry);
}
// Default
if (_default!=null)
entries.add(_default);
return entries;
}
/* --------------------------------------------------------------- */
/** Return whether the path matches any entries in the PathMap,
* excluding the default entry
* @param path Path to match
* @return Whether the PathMap contains any entries that match this
*/
public boolean containsMatch(String path)
{
MappedEntry match = getMatch(path);
return match!=null && !match.equals(_default);
}
/* --------------------------------------------------------------- */
@Override
public O remove(Object pathSpec)
{
if (pathSpec!=null)
{
String spec=(String) pathSpec;
if (spec.equals("/*"))
_prefixDefault=null;
else if (spec.endsWith("/*"))
_prefixMap.remove(spec.substring(0,spec.length()-2));
else if (spec.startsWith("*."))
_suffixMap.remove(spec.substring(2));
else if (spec.equals(URIUtil.SLASH))
{
_default=null;
_defaultSingletonList=null;
}
else
_exactMap.remove(spec);
}
return super.remove(pathSpec);
}
/* --------------------------------------------------------------- */
@Override
public void clear()
{
_exactMap.clear();
_prefixMap=new ArrayTernaryTrie<>(false);
_suffixMap=new ArrayTernaryTrie<>(false);
_default=null;
_defaultSingletonList=null;
_prefixDefault=null;
super.clear();
}
/* --------------------------------------------------------------- */
/**
* @return true if match.
*/
public static boolean match(String pathSpec, String path)
throws IllegalArgumentException
{
return match(pathSpec, path, false);
}
/* --------------------------------------------------------------- */
/**
* @return true if match.
*/
public static boolean match(String pathSpec, String path, boolean noDefault)
throws IllegalArgumentException
{
if (pathSpec.length()==0)
return "/".equals(path);
char c = pathSpec.charAt(0);
if (c=='/')
{
if (!noDefault && pathSpec.length()==1 || pathSpec.equals(path))
return true;
if(isPathWildcardMatch(pathSpec, path))
return true;
}
else if (c=='*')
return path.regionMatches(path.length()-pathSpec.length()+1,
pathSpec,1,pathSpec.length()-1);
return false;
}
/* --------------------------------------------------------------- */
private static boolean isPathWildcardMatch(String pathSpec, String path)
{
// For a spec of "/foo/*" match "/foo" , "/foo/..." but not "/foobar"
int cpl=pathSpec.length()-2;
if (pathSpec.endsWith("/*") && path.regionMatches(0,pathSpec,0,cpl))
{
if (path.length()==cpl || '/'==path.charAt(cpl))
return true;
}
return false;
}
/* --------------------------------------------------------------- */
/** Return the portion of a path that matches a path spec.
* @return null if no match at all.
*/
public static String pathMatch(String pathSpec, String path)
{
char c = pathSpec.charAt(0);
if (c=='/')
{
if (pathSpec.length()==1)
return path;
if (pathSpec.equals(path))
return path;
if (isPathWildcardMatch(pathSpec, path))
return path.substring(0,pathSpec.length()-2);
}
else if (c=='*')
{
if (path.regionMatches(path.length()-(pathSpec.length()-1),
pathSpec,1,pathSpec.length()-1))
return path;
}
return null;
}
/* --------------------------------------------------------------- */
/** Return the portion of a path that is after a path spec.
* @return The path info string
*/
public static String pathInfo(String pathSpec, String path)
{
if ("".equals(pathSpec))
return path; //servlet 3 spec sec 12.2 will be '/'
char c = pathSpec.charAt(0);
if (c=='/')
{
if (pathSpec.length()==1)
return null;
boolean wildcard = isPathWildcardMatch(pathSpec, path);
// handle the case where pathSpec uses a wildcard and path info is "/*"
if (pathSpec.equals(path) && !wildcard)
return null;
if (wildcard)
{
if (path.length()==pathSpec.length()-2)
return null;
return path.substring(pathSpec.length()-2);
}
}
return null;
}
/* ------------------------------------------------------------ */
/** Relative path.
* @param base The base the path is relative to.
* @param pathSpec The spec of the path segment to ignore.
* @param path the additional path
* @return base plus path with pathspec removed
*/
public static String relativePath(String base,
String pathSpec,
String path )
{
String info=pathInfo(pathSpec,path);
if (info==null)
info=path;
if( info.startsWith( "./"))
info = info.substring( 2);
if( base.endsWith( URIUtil.SLASH))
if( info.startsWith( URIUtil.SLASH))
path = base + info.substring(1);
else
path = base + info;
else
if( info.startsWith( URIUtil.SLASH))
path = base + info;
else
path = base + URIUtil.SLASH + info;
return path;
}
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
public static class MappedEntry implements Map.Entry
{
private final String key;
private final O value;
private String mapped;
MappedEntry(String key, O value)
{
this.key=key;
this.value=value;
}
@Override
public String getKey()
{
return key;
}
@Override
public O getValue()
{
return value;
}
@Override
public O setValue(O o)
{
throw new UnsupportedOperationException();
}
@Override
public String toString()
{
return key+"="+value;
}
public String getMapped()
{
return mapped;
}
void setMapped(String mapped)
{
this.mapped = mapped;
}
}
public static class PathSet extends AbstractSet implements Predicate
{
private final PathMap _map = new PathMap<>();
@Override
public Iterator iterator()
{
return _map.keySet().iterator();
}
@Override
public int size()
{
return _map.size();
}
@Override
public boolean add(String item)
{
return _map.put(item,Boolean.TRUE)==null;
}
@Override
public boolean remove(Object item)
{
return _map.remove(item)!=null;
}
@Override
public boolean contains(Object o)
{
return _map.containsKey(o);
}
@Override
public boolean test(String s)
{
return _map.containsMatch(s);
}
public boolean containsMatch(String s)
{
return _map.containsMatch(s);
}
public boolean matches(String item)
{
return _map.containsMatch(item);
}
}
}