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Utility classes for Jetty
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// ========================================================================
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================
package org.mortbay.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.Map;
import org.mortbay.log.Log;
/* ------------------------------------------------------------ */
/** Handles coding of MIME "x-www-form-urlencoded".
* This class handles the encoding and decoding for either
* the query string of a URL or the _content of a POST HTTP request.
*
* Notes
* The hashtable either contains String single values, vectors
* of String or arrays of Strings.
*
* This class is only partially synchronised. In particular, simple
* get operations are not protected from concurrent updates.
*
* @see java.net.URLEncoder
* @author Greg Wilkins (gregw)
*/
public class UrlEncoded extends MultiMap
{
/* ----------------------------------------------------------------- */
public UrlEncoded(UrlEncoded url)
{
super(url);
}
/* ----------------------------------------------------------------- */
public UrlEncoded()
{
super(6);
}
/* ----------------------------------------------------------------- */
public UrlEncoded(String s)
{
super(6);
decode(s,StringUtil.__UTF8);
}
/* ----------------------------------------------------------------- */
public UrlEncoded(String s, String charset)
{
super(6);
decode(s,charset);
}
/* ----------------------------------------------------------------- */
public void decode(String query)
{
decodeTo(query,this,StringUtil.__UTF8);
}
/* ----------------------------------------------------------------- */
public void decode(String query,String charset)
{
decodeTo(query,this,charset);
}
/* -------------------------------------------------------------- */
/** Encode Hashtable with % encoding.
*/
public String encode()
{
return encode(StringUtil.__UTF8,false);
}
/* -------------------------------------------------------------- */
/** Encode Hashtable with % encoding.
*/
public String encode(String charset)
{
return encode(charset,false);
}
/* -------------------------------------------------------------- */
/** Encode Hashtable with % encoding.
* @param equalsForNullValue if True, then an '=' is always used, even
* for parameters without a value. e.g. "blah?a=&b=&c=".
*/
public synchronized String encode(String charset, boolean equalsForNullValue)
{
return encode(this,charset,equalsForNullValue);
}
/* -------------------------------------------------------------- */
/** Encode Hashtable with % encoding.
* @param equalsForNullValue if True, then an '=' is always used, even
* for parameters without a value. e.g. "blah?a=&b=&c=".
*/
public static String encode(MultiMap map, String charset, boolean equalsForNullValue)
{
if (charset==null)
charset=StringUtil.__UTF8;
StringBuilder result = new StringBuilder(128);
Iterator iter = map.entrySet().iterator();
while(iter.hasNext())
{
Map.Entry entry = (Map.Entry)iter.next();
String key = entry.getKey().toString();
Object list = entry.getValue();
int s=LazyList.size(list);
if (s==0)
{
result.append(encodeString(key,charset));
if(equalsForNullValue)
result.append('=');
}
else
{
for (int i=0;i0)
result.append('&');
Object val=LazyList.get(list,i);
result.append(encodeString(key,charset));
if (val!=null)
{
String str=val.toString();
if (str.length()>0)
{
result.append('=');
result.append(encodeString(str,charset));
}
else if (equalsForNullValue)
result.append('=');
}
else if (equalsForNullValue)
result.append('=');
}
}
if (iter.hasNext())
result.append('&');
}
return result.toString();
}
/* -------------------------------------------------------------- */
/** Decoded parameters to Map.
* @param content the string containing the encoded parameters
*/
public static void decodeTo(String content, MultiMap map, String charset)
{
if (charset==null)
charset=StringUtil.__UTF8;
synchronized(map)
{
String key = null;
String value = null;
int mark=-1;
boolean encoded=false;
for (int i=0;i0)
{
map.add(value,"");
}
key = null;
value=null;
break;
case '=':
if (key!=null)
break;
key = encoded?decodeString(content,mark+1,i-mark-1,charset):content.substring(mark+1,i);
mark=i;
encoded=false;
break;
case '+':
encoded=true;
break;
case '%':
encoded=true;
break;
}
}
if (key != null)
{
int l=content.length()-mark-1;
value = l==0?"":(encoded?decodeString(content,mark+1,l,charset):content.substring(mark+1));
map.add(key,value);
}
else if (mark0)
{
map.add(value,"");
}
key = null;
value=null;
break;
case '=':
if (key!=null)
{
buffer.append(b);
break;
}
key = buffer.toString();
buffer.reset();
break;
case '+':
buffer.append((byte)' ');
break;
case '%':
if (i+20)
{
map.add(buffer.toString(),"");
}
}
}
/* -------------------------------------------------------------- */
/** Decoded parameters to Map.
* @param in InputSteam to read
* @param map MultiMap to add parameters to
* @param maxLength maximum length of content to read 0r -1 for no limit
*/
public static void decode88591To(InputStream in, MultiMap map, int maxLength)
throws IOException
{
synchronized(map)
{
StringBuffer buffer = new StringBuffer();
String key = null;
String value = null;
int b;
// TODO cache of parameter names ???
int totalLength=0;
while ((b=in.read())>=0)
{
switch ((char) b)
{
case '&':
value = buffer.length()==0?"":buffer.toString();
buffer.setLength(0);
if (key != null)
{
map.add(key,value);
}
else if (value!=null&&value.length()>0)
{
map.add(value,"");
}
key = null;
value=null;
break;
case '=':
if (key!=null)
{
buffer.append((char)b);
break;
}
key = buffer.toString();
buffer.setLength(0);
break;
case '+':
buffer.append((char)' ');
break;
case '%':
int dh=in.read();
int dl=in.read();
if (dh<0||dl<0)
break;
buffer.append((char)((TypeUtil.convertHexDigit((byte)dh)<<4) + TypeUtil.convertHexDigit((byte)dl)));
break;
default:
buffer.append((char)b);
break;
}
if (maxLength>=0 && (++totalLength > maxLength))
throw new IllegalStateException("Form too large");
}
if (key != null)
{
value = buffer.length()==0?"":buffer.toString();
buffer.setLength(0);
map.add(key,value);
}
else if (buffer.length()>0)
{
map.add(buffer.toString(), "");
}
}
}
/* -------------------------------------------------------------- */
/** Decoded parameters to Map.
* @param in InputSteam to read
* @param map MultiMap to add parameters to
* @param maxLength maximum length of conent to read 0r -1 for no limit
*/
public static void decodeUtf8To(InputStream in, MultiMap map, int maxLength)
throws IOException
{
synchronized(map)
{
Utf8StringBuilder buffer = new Utf8StringBuilder();
String key = null;
String value = null;
int b;
// TODO cache of parameter names ???
int totalLength=0;
while ((b=in.read())>=0)
{
switch ((char) b)
{
case '&':
value = buffer.length()==0?"":buffer.toString();
buffer.reset();
if (key != null)
{
map.add(key,value);
}
else if (value!=null&&value.length()>0)
{
map.add(value,"");
}
key = null;
value=null;
break;
case '=':
if (key!=null)
{
buffer.append((byte)b);
break;
}
key = buffer.toString();
buffer.reset();
break;
case '+':
buffer.append((byte)' ');
break;
case '%':
int dh=in.read();
int dl=in.read();
if (dh<0||dl<0)
break;
buffer.append((byte)((TypeUtil.convertHexDigit((byte)dh)<<4) + TypeUtil.convertHexDigit((byte)dl)));
break;
default:
buffer.append((byte)b);
break;
}
if (maxLength>=0 && (++totalLength > maxLength))
throw new IllegalStateException("Form too large");
}
if (key != null)
{
value = buffer.length()==0?"":buffer.toString();
buffer.reset();
map.add(key,value);
}
else if (buffer.length()>0)
{
map.add(buffer.toString(), "");
}
}
}
/* -------------------------------------------------------------- */
public static void decodeUtf16To(InputStream in, MultiMap map, int maxLength) throws IOException
{
InputStreamReader input = new InputStreamReader(in,StringUtil.__UTF16);
StringBuffer buf = new StringBuffer();
int c;
int length=0;
if (maxLength<0)
maxLength=Integer.MAX_VALUE;
while ((c=input.read())>0 && length++0)
{
switch ((char) c)
{
case '&':
size=output.size();
value = size==0?"":output.toString(charset);
output.setCount(0);
if (key != null)
{
map.add(key,value);
}
else if (value!=null&&value.length()>0)
{
map.add(value,"");
}
key = null;
value=null;
break;
case '=':
if (key!=null)
{
output.write(c);
break;
}
size=output.size();
key = size==0?"":output.toString(charset);
output.setCount(0);
break;
case '+':
output.write(' ');
break;
case '%':
digits=2;
break;
default:
if (digits==2)
{
digit=TypeUtil.convertHexDigit((byte)c);
digits=1;
}
else if (digits==1)
{
output.write((digit<<4) + TypeUtil.convertHexDigit((byte)c));
digits=0;
}
else
output.write(c);
break;
}
totalLength++;
if (maxLength>=0 && totalLength > maxLength)
throw new IllegalStateException("Form too large");
}
size=output.size();
if (key != null)
{
value = size==0?"":output.toString(charset);
output.setCount(0);
map.add(key,value);
}
else if (size>0)
map.add(output.toString(charset),"");
}
}
/* -------------------------------------------------------------- */
/** Decode String with % encoding.
* This method makes the assumption that the majority of calls
* will need no decoding.
*/
public static String decodeString(String encoded,int offset,int length,String charset)
{
if (charset==null)
charset=StringUtil.__UTF8;
byte[] bytes=null;
int n=0;
for (int i=0;i0xff)
throw new IllegalArgumentException("Not encoded");
if (c=='+')
{
if (bytes==null)
{
bytes=new byte[length*2];
encoded.getBytes(offset, offset+i, bytes, 0);
n=i;
}
bytes[n++] = (byte) ' ';
}
else if (c=='%' && (i+2)='a' && cn<='z')
b=(byte)(10+cn-'a');
else if (cn>='A' && cn<='Z')
b=(byte)(10+cn-'A');
else
b=(byte)(cn-'0');
cn = encoded.charAt(offset+i+2);
if (cn>='a' && cn<='z')
b=(byte)(b*16+10+cn-'a');
else if (cn>='A' && cn<='Z')
b=(byte)(b*16+10+cn-'A');
else
b=(byte)(b*16+cn-'0');
if (bytes==null)
{
bytes=new byte[length];
encoded.getBytes(offset, offset+i, bytes, 0);
n=i;
}
i+=2;
bytes[n++]=b;
}
else if (n>0)
bytes[n++] = (byte) c;
}
if (bytes==null)
{
if (offset==0 && encoded.length()==length)
return encoded;
return encoded.substring(offset,offset+length);
}
try
{
return new String(bytes,0,n,charset);
}
catch (UnsupportedEncodingException e)
{
Log.warn(e.toString());
Log.debug(e);
return new String(bytes,0,n);
}
}
/* ------------------------------------------------------------ */
/** Perform URL encoding.
* Assumes 8859 charset
* @param string
* @return encoded string.
*/
public static String encodeString(String string)
{
return encodeString(string,StringUtil.__UTF8);
}
/* ------------------------------------------------------------ */
/** Perform URL encoding.
* @param string
* @return encoded string.
*/
public static String encodeString(String string,String charset)
{
if (charset==null)
charset=StringUtil.__UTF8;
byte[] bytes=null;
try
{
bytes=string.getBytes(charset);
}
catch(UnsupportedEncodingException e)
{
// Log.warn(LogSupport.EXCEPTION,e);
bytes=string.getBytes();
}
int len=bytes.length;
byte[] encoded= new byte[bytes.length*3];
int n=0;
boolean noEncode=true;
for (int i=0;i='a' && b<='z' ||
b>='A' && b<='Z' ||
b>='0' && b<='9')
{
encoded[n++]=b;
}
else
{
noEncode=false;
encoded[n++]=(byte)'%';
byte nibble= (byte) ((b&0xf0)>>4);
if (nibble>=10)
encoded[n++]=(byte)('A'+nibble-10);
else
encoded[n++]=(byte)('0'+nibble);
nibble= (byte) (b&0xf);
if (nibble>=10)
encoded[n++]=(byte)('A'+nibble-10);
else
encoded[n++]=(byte)('0'+nibble);
}
}
if (noEncode)
return string;
try
{
return new String(encoded,0,n,charset);
}
catch(UnsupportedEncodingException e)
{
// Log.warn(LogSupport.EXCEPTION,e);
return new String(encoded,0,n);
}
}
/* ------------------------------------------------------------ */
/**
*/
public Object clone()
{
return new UrlEncoded(this);
}
}
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