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Jetty example source code file (UrlEncoded.java)
This example Jetty source code file (UrlEncoded.java) is included in the DevDaily.com
"Java Source Code
Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.
The Jetty UrlEncoded.java source code
// ========================================================================
// 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.
*
* <p>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;
StringBuffer result = new StringBuffer(128);
synchronized(result)
{
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;i<s;i++)
{
if (i>0)
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;i<content.length();i++)
{
char c = content.charAt(i);
switch (c)
{
case '&':
int l=i-mark-1;
value = l==0?"":
(encoded?decodeString(content,mark+1,l,charset):content.substring(mark+1,i));
mark=i;
encoded=false;
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)
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 (mark<content.length())
{
key = encoded
?decodeString(content,mark+1,content.length()-mark-1,charset)
:content.substring(mark+1);
map.add(key,"");
}
}
}
/* -------------------------------------------------------------- */
/** Decoded parameters to Map.
* @param data the byte[] containing the encoded parameters
*/
public static void decodeUtf8To(byte[] raw,int offset, int length, MultiMap map)
{
synchronized(map)
{
Utf8StringBuffer buffer = new Utf8StringBuffer();
String key = null;
String value = null;
// TODO cache of parameter names ???
int end=offset+length;
for (int i=offset;i<end;i++)
{
byte b=raw[i];
switch ((char)(0xff&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(b);
break;
}
key = buffer.toString();
buffer.reset();
break;
case '+':
buffer.append((byte)' ');
break;
case '%':
if (i+2<end)
buffer.append((byte)((TypeUtil.convertHexDigit(raw[++i])<<4) + TypeUtil.convertHexDigit(raw[++i])));
break;
default:
buffer.append(b);
break;
}
}
if (key != null)
{
value = buffer.length()==0?"":buffer.toString();
buffer.reset();
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)
{
Utf8StringBuffer buffer = new Utf8StringBuffer();
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++<maxLength)
buf.append((char)c);
decodeTo(buf.toString(),map,StringUtil.__UTF8);
}
/* -------------------------------------------------------------- */
/** Decoded parameters to Map.
* @param in the stream containing the encoded parameters
*/
public static void decodeTo(InputStream in, MultiMap map, String charset, int maxLength)
throws IOException
{
if (charset==null || StringUtil.__UTF8.equalsIgnoreCase(charset) || StringUtil.__ISO_8859_1.equalsIgnoreCase(charset))
{
decodeUtf8To(in,map,maxLength);
return;
}
if (StringUtil.__UTF16.equalsIgnoreCase(charset)) // Should be all 2 byte encodings
{
decodeUtf16To(in,map,maxLength);
return;
}
synchronized(map)
{
String key = null;
String value = null;
int c;
int digit=0;
int digits=0;
int l=-1;
int totalLength = 0;
ByteArrayOutputStream2 output = new ByteArrayOutputStream2();
int size=0;
while ((c=in.read())>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;i<length;i++)
{
char c = encoded.charAt(offset+i);
if (c<0||c>0xff)
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)<length)
{
byte b;
char cn = encoded.charAt(offset+i+1);
if (cn>='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<len;i++)
{
byte b = bytes[i];
if (b==' ')
{
noEncode=false;
encoded[n++]=(byte)'+';
}
else if (b>='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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