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// ========================================================================
// Copyright (c) 2004-2009 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.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.Map;


/* ------------------------------------------------------------ */
/** 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 UTF-8 charset is assumed, unless otherwise defined by either * passing a parameter or setting the "org.eclipse.jetty.util.UrlEncoding.charset" * System property. *

* 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 */ public class UrlEncoded extends MultiMap { public static final String ENCODING = System.getProperty("org.eclipse.jetty.util.UrlEncoding.charset",StringUtil.__UTF8); /* ----------------------------------------------------------------- */ public UrlEncoded(UrlEncoded url) { super(url); } /* ----------------------------------------------------------------- */ public UrlEncoded() { super(6); } /* ----------------------------------------------------------------- */ public UrlEncoded(String s) { super(6); decode(s,ENCODING); } /* ----------------------------------------------------------------- */ public UrlEncoded(String s, String charset) { super(6); decode(s,charset); } /* ----------------------------------------------------------------- */ public void decode(String query) { decodeTo(query,this,ENCODING); } /* ----------------------------------------------------------------- */ public void decode(String query,String charset) { decodeTo(query,this,charset); } /* -------------------------------------------------------------- */ /** Encode Hashtable with % encoding. */ public String encode() { return encode(ENCODING,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=ENCODING; 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=ENCODING; 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(' '); 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 content 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 || StringUtil.isUTF8(charset)) { Utf8StringBuffer buffer=null; for (int i=0;i0xff) { if (buffer==null) { buffer=new Utf8StringBuffer(length); buffer.getStringBuffer().append(encoded,offset,offset+i+1); } else buffer.getStringBuffer().append(c); } else if (c=='+') { if (buffer==null) { buffer=new Utf8StringBuffer(length); buffer.getStringBuffer().append(encoded,offset,offset+i); } buffer.getStringBuffer().append(' '); } else if (c=='%' && (i+2)0xff) { if (buffer==null) { buffer=new StringBuffer(length); buffer.append(encoded,offset,offset+i+1); } else buffer.append(c); } else if (c=='+') { if (buffer==null) { buffer=new StringBuffer(length); buffer.append(encoded,offset,offset+i); } buffer.append(' '); } else if (c=='%' && (i+2)=0 && c<=0xff) { if (c=='%') { if(i+2=length) break; c = encoded.charAt(offset+i); } i--; buffer.append(new String(ba,0,n,charset)); } else if (buffer!=null) buffer.append(c); } if (buffer==null) { if (offset==0 && encoded.length()==length) return encoded; return encoded.substring(offset,offset+length); } return buffer.toString(); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } } } /* ------------------------------------------------------------ */ /** Perform URL encoding. * @param string * @return encoded string. */ public static String encodeString(String string) { return encodeString(string,ENCODING); } /* ------------------------------------------------------------ */ /** Perform URL encoding. * @param string * @return encoded string. */ public static String encodeString(String string,String charset) { if (charset==null) charset=ENCODING; 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); } } /* ------------------------------------------------------------ */ /** */ @Override public Object clone() { return new UrlEncoded(this); } }





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