//
// ========================================================================
// Copyright (c) 1995-2013 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 static org.eclipse.jetty.util.QuotedStringTokenizer.isQuoted;
import static org.eclipse.jetty.util.QuotedStringTokenizer.quoteOnly;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.Enumeration;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TimeZone;
import org.eclipse.jetty.util.ArrayTernaryTrie;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.DateCache;
import org.eclipse.jetty.util.LazyList;
import org.eclipse.jetty.util.QuotedStringTokenizer;
import org.eclipse.jetty.util.StringMap;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.Trie;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* HTTP Fields. A collection of HTTP header and or Trailer fields.
*
* <p>This class is not synchronised as it is expected that modifications will only be performed by a
* single thread.
*
* <p>The cookie handling provided by this class is guided by the Servlet specification and RFC6265.
*
*/
public class HttpFields implements Iterable<HttpField>
{
private static final Logger LOG = Log.getLogger(HttpFields.class);
public static final TimeZone __GMT = TimeZone.getTimeZone("GMT");
public static final DateCache __dateCache = new DateCache("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US);
public static final String __COOKIE_DELIM="\",;\\ \t";
static
{
__GMT.setID("GMT");
__dateCache.setTimeZone(__GMT);
}
public final static String __separators = ", \t";
private static final String[] DAYS =
{ "Sat", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
private static final String[] MONTHS =
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan"};
public static class DateGenerator
{
private final StringBuilder buf = new StringBuilder(32);
private final GregorianCalendar gc = new GregorianCalendar(__GMT);
/**
* Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'"
*/
public String formatDate(long date)
{
buf.setLength(0);
gc.setTimeInMillis(date);
int day_of_week = gc.get(Calendar.DAY_OF_WEEK);
int day_of_month = gc.get(Calendar.DAY_OF_MONTH);
int month = gc.get(Calendar.MONTH);
int year = gc.get(Calendar.YEAR);
int century = year / 100;
year = year % 100;
int hours = gc.get(Calendar.HOUR_OF_DAY);
int minutes = gc.get(Calendar.MINUTE);
int seconds = gc.get(Calendar.SECOND);
buf.append(DAYS[day_of_week]);
buf.append(',');
buf.append(' ');
StringUtil.append2digits(buf, day_of_month);
buf.append(' ');
buf.append(MONTHS[month]);
buf.append(' ');
StringUtil.append2digits(buf, century);
StringUtil.append2digits(buf, year);
buf.append(' ');
StringUtil.append2digits(buf, hours);
buf.append(':');
StringUtil.append2digits(buf, minutes);
buf.append(':');
StringUtil.append2digits(buf, seconds);
buf.append(" GMT");
return buf.toString();
}
/**
* Format "EEE, dd-MMM-yy HH:mm:ss 'GMT'" for cookies
*/
public void formatCookieDate(StringBuilder buf, long date)
{
gc.setTimeInMillis(date);
int day_of_week = gc.get(Calendar.DAY_OF_WEEK);
int day_of_month = gc.get(Calendar.DAY_OF_MONTH);
int month = gc.get(Calendar.MONTH);
int year = gc.get(Calendar.YEAR);
year = year % 10000;
int epoch = (int) ((date / 1000) % (60 * 60 * 24));
int seconds = epoch % 60;
epoch = epoch / 60;
int minutes = epoch % 60;
int hours = epoch / 60;
buf.append(DAYS[day_of_week]);
buf.append(',');
buf.append(' ');
StringUtil.append2digits(buf, day_of_month);
buf.append('-');
buf.append(MONTHS[month]);
buf.append('-');
StringUtil.append2digits(buf, year/100);
StringUtil.append2digits(buf, year%100);
buf.append(' ');
StringUtil.append2digits(buf, hours);
buf.append(':');
StringUtil.append2digits(buf, minutes);
buf.append(':');
StringUtil.append2digits(buf, seconds);
buf.append(" GMT");
}
}
private static final ThreadLocal<DateGenerator> __dateGenerator =new ThreadLocal<DateGenerator>()
{
@Override
protected DateGenerator initialValue()
{
return new DateGenerator();
}
};
/**
* Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'"
*/
public static String formatDate(long date)
{
return __dateGenerator.get().formatDate(date);
}
/**
* Format "EEE, dd-MMM-yyyy HH:mm:ss 'GMT'" for cookies
*/
public static void formatCookieDate(StringBuilder buf, long date)
{
__dateGenerator.get().formatCookieDate(buf,date);
}
/**
* Format "EEE, dd-MMM-yyyy HH:mm:ss 'GMT'" for cookies
*/
public static String formatCookieDate(long date)
{
StringBuilder buf = new StringBuilder(28);
formatCookieDate(buf, date);
return buf.toString();
}
private final static String __dateReceiveFmt[] =
{
"EEE, dd MMM yyyy HH:mm:ss zzz",
"EEE, dd-MMM-yy HH:mm:ss",
"EEE MMM dd HH:mm:ss yyyy",
"EEE, dd MMM yyyy HH:mm:ss", "EEE dd MMM yyyy HH:mm:ss zzz",
"EEE dd MMM yyyy HH:mm:ss", "EEE MMM dd yyyy HH:mm:ss zzz", "EEE MMM dd yyyy HH:mm:ss",
"EEE MMM-dd-yyyy HH:mm:ss zzz", "EEE MMM-dd-yyyy HH:mm:ss", "dd MMM yyyy HH:mm:ss zzz",
"dd MMM yyyy HH:mm:ss", "dd-MMM-yy HH:mm:ss zzz", "dd-MMM-yy HH:mm:ss", "MMM dd HH:mm:ss yyyy zzz",
"MMM dd HH:mm:ss yyyy", "EEE MMM dd HH:mm:ss yyyy zzz",
"EEE, MMM dd HH:mm:ss yyyy zzz", "EEE, MMM dd HH:mm:ss yyyy", "EEE, dd-MMM-yy HH:mm:ss zzz",
"EEE dd-MMM-yy HH:mm:ss zzz", "EEE dd-MMM-yy HH:mm:ss",
};
private static class DateParser
{
final SimpleDateFormat _dateReceive[]= new SimpleDateFormat[__dateReceiveFmt.length];
long parse(final String dateVal)
{
for (int i = 0; i < _dateReceive.length; i++)
{
if (_dateReceive[i] == null)
{
_dateReceive[i] = new SimpleDateFormat(__dateReceiveFmt[i], Locale.US);
_dateReceive[i].setTimeZone(__GMT);
}
try
{
Date date = (Date) _dateReceive[i].parseObject(dateVal);
return date.getTime();
}
catch (java.lang.Exception e)
{
// LOG.ignore(e);
}
}
if (dateVal.endsWith(" GMT"))
{
final String val = dateVal.substring(0, dateVal.length() - 4);
for (SimpleDateFormat element : _dateReceive)
{
try
{
Date date = (Date) element.parseObject(val);
return date.getTime();
}
catch (java.lang.Exception e)
{
// LOG.ignore(e);
}
}
}
return -1;
}
}
public static long parseDate(String date)
{
return __dateParser.get().parse(date);
}
private static final ThreadLocal<DateParser> __dateParser =new ThreadLocal<DateParser>()
{
@Override
protected DateParser initialValue()
{
return new DateParser();
}
};
public final static String __01Jan1970=formatDate(0);
public final static ByteBuffer __01Jan1970_BUFFER=BufferUtil.toBuffer(__01Jan1970);
public final static String __01Jan1970_COOKIE = formatCookieDate(0).trim();
private final ArrayList<HttpField> _fields = new ArrayList<>(20);
/**
* Constructor.
*/
public HttpFields()
{
}
/**
* Get Collection of header names.
*/
public Collection<String> getFieldNamesCollection()
{
final Set<String> list = new HashSet<>(_fields.size());
for (HttpField f : _fields)
{
if (f!=null)
list.add(f.getName());
}
return list;
}
/**
* Get enumeration of header _names. Returns an enumeration of strings representing the header
* _names for this request.
*/
public Enumeration<String> getFieldNames()
{
return Collections.enumeration(getFieldNamesCollection());
}
public int size()
{
return _fields.size();
}
/**
* Get a Field by index.
* @return A Field value or null if the Field value has not been set
*
*/
public HttpField getField(int i)
{
return _fields.get(i);
}
@Override
public Iterator<HttpField> iterator()
{
return _fields.iterator();
}
public HttpField getField(HttpHeader header)
{
for (int i=0;i<_fields.size();i++)
{
HttpField f=_fields.get(i);
if (f.getHeader()==header)
return f;
}
return null;
}
public HttpField getField(String name)
{
for (int i=0;i<_fields.size();i++)
{
HttpField f=_fields.get(i);
if (f.getName().equalsIgnoreCase(name))
return f;
}
return null;
}
public boolean contains(HttpHeader header, String value)
{
for (int i=0;i<_fields.size();i++)
{
HttpField f=_fields.get(i);
if (f.getHeader()==header && f.contains(value))
return true;
}
return false;
}
public boolean contains(String name, String value)
{
for (int i=0;i<_fields.size();i++)
{
HttpField f=_fields.get(i);
if (f.getName().equalsIgnoreCase(name) && f.contains(value))
return true;
}
return false;
}
public boolean containsKey(String name)
{
for (int i=0;i<_fields.size();i++)
{
HttpField f=_fields.get(i);
if (f.getName().equalsIgnoreCase(name))
return true;
}
return false;
}
public String getStringField(HttpHeader header)
{
return getStringField(header.asString());
}
public String get(HttpHeader header)
{
return getStringField(header.asString());
}
public String get(String header)
{
return getStringField(header);
}
/**
* @return the value of a field, or null if not found. For multiple fields of the same name,
* only the first is returned.
* @param name the case-insensitive field name
*/
public String getStringField(String name)
{
HttpField field = getField(name);
return field==null?null:field.getValue();
}
/**
* Get multi headers
*
* @return Enumeration of the values, or null if no such header.
* @param name the case-insensitive field name
*/
public Collection<String> getValuesCollection(String name)
{
final List<String> list = new ArrayList<>();
for (HttpField f : _fields)
if (f.getName().equalsIgnoreCase(name))
list.add(f.getValue());
return list;
}
/**
* Get multi headers
*
* @return Enumeration of the values
* @param name the case-insensitive field name
*/
public Enumeration<String> getValues(final String name)
{
for (int i=0;i<_fields.size();i++)
{
final HttpField f = _fields.get(i);
if (f.getName().equalsIgnoreCase(name))
{
final int first=i;
return new Enumeration<String>()
{
HttpField field=f;
int i = first+1;
@Override
public boolean hasMoreElements()
{
if (field==null)
{
while (i<_fields.size())
{
field=_fields.get(i++);
if (field.getName().equalsIgnoreCase(name))
return true;
}
field=null;
return false;
}
return true;
}
@Override
public String nextElement() throws NoSuchElementException
{
if (hasMoreElements())
{
String value=field.getValue();
field=null;
return value;
}
throw new NoSuchElementException();
}
};
}
}
List<String> empty=Collections.emptyList();
return Collections.enumeration(empty);
}
/**
* Get multi field values with separator. The multiple values can be represented as separate
* headers of the same name, or by a single header using the separator(s), or a combination of
* both. Separators may be quoted.
*
* @param name the case-insensitive field name
* @param separators String of separators.
* @return Enumeration of the values, or null if no such header.
*/
public Enumeration<String> getValues(String name, final String separators)
{
final Enumeration<String> e = getValues(name);
if (e == null)
return null;
return new Enumeration<String>()
{
QuotedStringTokenizer tok = null;
@Override
public boolean hasMoreElements()
{
if (tok != null && tok.hasMoreElements()) return true;
while (e.hasMoreElements())
{
String value = e.nextElement();
if (value!=null)
{
tok = new QuotedStringTokenizer(value, separators, false, false);
if (tok.hasMoreElements()) return true;
}
}
tok = null;
return false;
}
@Override
public String nextElement() throws NoSuchElementException
{
if (!hasMoreElements()) throw new NoSuchElementException();
String next = (String) tok.nextElement();
if (next != null) next = next.trim();
return next;
}
};
}
public void put(HttpField field)
{
boolean put=false;
for (int i=_fields.size();i-->0;)
{
HttpField f=_fields.get(i);
if (f.isSame(field))
{
if (put)
_fields.remove(i);
else
{
_fields.set(i,field);
put=true;
}
}
}
if (!put)
_fields.add(field);
}
/**
* Set a field.
*
* @param name the name of the field
* @param value the value of the field. If null the field is cleared.
*/
public void put(String name, String value)
{
if (value == null)
remove(name);
else
put(new HttpField(name, value));
}
public void put(HttpHeader header, HttpHeaderValue value)
{
put(header,value.toString());
}
/**
* Set a field.
*
* @param header the header name of the field
* @param value the value of the field. If null the field is cleared.
*/
public void put(HttpHeader header, String value)
{
if (value == null)
remove(header);
else
put(new HttpField(header, value));
}
/**
* Set a field.
*
* @param name the name of the field
* @param list the List value of the field. If null the field is cleared.
*/
public void put(String name, List<String> list)
{
remove(name);
for (String v : list)
if (v!=null)
add(name,v);
}
/**
* Add to or set a field. If the field is allowed to have multiple values, add will add multiple
* headers of the same name.
*
* @param name the name of the field
* @param value the value of the field.
* @exception IllegalArgumentException If the name is a single valued field and already has a
* value.
*/
public void add(String name, String value) throws IllegalArgumentException
{
if (value == null)
return;
HttpField field = new HttpField(name, value);
_fields.add(field);
}
public void add(HttpHeader header, HttpHeaderValue value) throws IllegalArgumentException
{
add(header,value.toString());
}
/**
* Add to or set a field. If the field is allowed to have multiple values, add will add multiple
* headers of the same name.
*
* @param header the header
* @param value the value of the field.
* @exception IllegalArgumentException
*/
public void add(HttpHeader header, String value) throws IllegalArgumentException
{
if (value == null) throw new IllegalArgumentException("null value");
HttpField field = new HttpField(header, value);
_fields.add(field);
}
/**
* Remove a field.
*
* @param name the field to remove
*/
public void remove(HttpHeader name)
{
for (int i=_fields.size();i-->0;)
{
HttpField f=_fields.get(i);
if (f.getHeader()==name)
_fields.remove(i);
}
}
/**
* Remove a field.
*
* @param name the field to remove
*/
public void remove(String name)
{
for (int i=_fields.size();i-->0;)
{
HttpField f=_fields.get(i);
if (f.getName().equalsIgnoreCase(name))
_fields.remove(i);
}
}
/**
* Get a header as an long value. Returns the value of an integer field or -1 if not found. The
* case of the field name is ignored.
*
* @param name the case-insensitive field name
* @exception NumberFormatException If bad long found
*/
public long getLongField(String name) throws NumberFormatException
{
HttpField field = getField(name);
return field==null?-1L:field.getLongValue();
}
/**
* Get a header as a date value. Returns the value of a date field, or -1 if not found. The case
* of the field name is ignored.
*
* @param name the case-insensitive field name
*/
public long getDateField(String name)
{
HttpField field = getField(name);
if (field == null)
return -1;
String val = valueParameters(field.getValue(), null);
if (val == null)
return -1;
final long date = __dateParser.get().parse(val);
if (date==-1)
throw new IllegalArgumentException("Cannot convert date: " + val);
return date;
}
/**
* Sets the value of an long field.
*
* @param name the field name
* @param value the field long value
*/
public void putLongField(HttpHeader name, long value)
{
String v = Long.toString(value);
put(name, v);
}
/**
* Sets the value of an long field.
*
* @param name the field name
* @param value the field long value
*/
public void putLongField(String name, long value)
{
String v = Long.toString(value);
put(name, v);
}
/**
* Sets the value of a date field.
*
* @param name the field name
* @param date the field date value
*/
public void putDateField(HttpHeader name, long date)
{
String d=formatDate(date);
put(name, d);
}
/**
* Sets the value of a date field.
*
* @param name the field name
* @param date the field date value
*/
public void putDateField(String name, long date)
{
String d=formatDate(date);
put(name, d);
}
/**
* Sets the value of a date field.
*
* @param name the field name
* @param date the field date value
*/
public void addDateField(String name, long date)
{
String d=formatDate(date);
add(name,d);
}
/**
* Format a set cookie value
*
* @param cookie The cookie.
*/
public void addSetCookie(HttpCookie cookie)
{
addSetCookie(
cookie.getName(),
cookie.getValue(),
cookie.getDomain(),
cookie.getPath(),
cookie.getMaxAge(),
cookie.getComment(),
cookie.isSecure(),
cookie.isHttpOnly(),
cookie.getVersion());
}
/**
* Format a set cookie value
*
* @param name the name
* @param value the value
* @param domain the domain
* @param path the path
* @param maxAge the maximum age
* @param comment the comment (only present on versions > 0)
* @param isSecure true if secure cookie
* @param isHttpOnly true if for http only
* @param version version of cookie logic to use (0 == default behavior)
*/
public void addSetCookie(
final String name,
final String value,
final String domain,
final String path,
final long maxAge,
final String comment,
final boolean isSecure,
final boolean isHttpOnly,
int version)
{
// Check arguments
if (name == null || name.length() == 0)
throw new IllegalArgumentException("Bad cookie name");
// Format value and params
StringBuilder buf = new StringBuilder(128);
// Name is checked for legality by servlet spec, but can also be passed directly so check again for quoting
boolean quote_name=isQuoteNeededForCookie(name);
quoteOnlyOrAppend(buf,name,quote_name);
buf.append('=');
// Remember name= part to look for other matching set-cookie
String name_equals=buf.toString();
// Append the value
boolean quote_value=isQuoteNeededForCookie(value);
quoteOnlyOrAppend(buf,value,quote_value);
// Look for domain and path fields and check if they need to be quoted
boolean has_domain = domain!=null && domain.length()>0;
boolean quote_domain = has_domain && isQuoteNeededForCookie(domain);
boolean has_path = path!=null && path.length()>0;
boolean quote_path = has_path && isQuoteNeededForCookie(path);
// Upgrade the version if we have a comment or we need to quote value/path/domain or if they were already quoted
if (version==0 && ( comment!=null || quote_name || quote_value || quote_domain || quote_path || isQuoted(name) || isQuoted(value) || isQuoted(path) || isQuoted(domain)))
version=1;
// Append version
if (version==1)
buf.append (";Version=1");
else if (version>1)
buf.append (";Version=").append(version);
// Append path
if (has_path)
{
buf.append(";Path=");
quoteOnlyOrAppend(buf,path,quote_path);
}
// Append domain
if (has_domain)
{
buf.append(";Domain=");
quoteOnlyOrAppend(buf,domain,quote_domain);
}
// Handle max-age and/or expires
if (maxAge >= 0)
{
// Always use expires
// This is required as some browser (M$ this means you!) don't handle max-age even with v1 cookies
buf.append(";Expires=");
if (maxAge == 0)
buf.append(__01Jan1970_COOKIE);
else
formatCookieDate(buf, System.currentTimeMillis() + 1000L * maxAge);
// for v1 cookies, also send max-age
if (version>=1)
{
buf.append(";Max-Age=");
buf.append(maxAge);
}
}
// add the other fields
if (isSecure)
buf.append(";Secure");
if (isHttpOnly)
buf.append(";HttpOnly");
if (comment != null)
{
buf.append(";Comment=");
quoteOnlyOrAppend(buf,comment,isQuoteNeededForCookie(comment));
}
// remove any existing set-cookie fields of same name
Iterator<HttpField> i=_fields.iterator();
while (i.hasNext())
{
HttpField field=i.next();
if (field.getHeader()==HttpHeader.SET_COOKIE)
{
String val = field.getValue();
if (val!=null && val.startsWith(name_equals))
{
//existing cookie has same name, does it also match domain and path?
if (((!has_domain && !val.contains("Domain")) || (has_domain && val.contains(domain))) &&
((!has_path && !val.contains("Path")) || (has_path && val.contains(path))))
{
i.remove();
}
}
}
}
// add the set cookie
add(HttpHeader.SET_COOKIE.toString(), buf.toString());
// Expire responses with set-cookie headers so they do not get cached.
put(HttpHeader.EXPIRES.toString(), __01Jan1970);
}
public void putTo(ByteBuffer bufferInFillMode)
{
for (HttpField field : _fields)
{
if (field != null)
field.putTo(bufferInFillMode);
}
BufferUtil.putCRLF(bufferInFillMode);
}
@Override
public String
toString()
{
try
{
StringBuilder buffer = new StringBuilder();
for (HttpField field : _fields)
{
if (field != null)
{
String tmp = field.getName();
if (tmp != null) buffer.append(tmp);
buffer.append(": ");
tmp = field.getValue();
if (tmp != null) buffer.append(tmp);
buffer.append("\r\n");
}
}
buffer.append("\r\n");
return buffer.toString();
}
catch (Exception e)
{
LOG.warn(e);
return e.toString();
}
}
/**
* Clear the header.
*/
public void clear()
{
_fields.clear();
}
public void add(HttpField field)
{
_fields.add(field);
}
/**
* Add fields from another HttpFields instance. Single valued fields are replaced, while all
* others are added.
*
* @param fields the fields to add
*/
public void add(HttpFields fields)
{
if (fields == null) return;
Enumeration<String> e = fields.getFieldNames();
while (e.hasMoreElements())
{
String name = e.nextElement();
Enumeration<String> values = fields.getValues(name);
while (values.hasMoreElements())
add(name, values.nextElement());
}
}
/**
* Get field value parameters. Some field values can have parameters. This method separates the
* value from the parameters and optionally populates a map with the parameters. For example:
*
* <PRE>
*
* FieldName : Value ; param1=val1 ; param2=val2
*
* </PRE>
*
* @param value The Field value, possibly with parameteres.
* @param parameters A map to populate with the parameters, or null
* @return The value.
*/
public static String valueParameters(String value, Map<String,String> parameters)
{
if (value == null) return null;
int i = value.indexOf(';');
if (i < 0) return value;
if (parameters == null) return value.substring(0, i).trim();
StringTokenizer tok1 = new QuotedStringTokenizer(value.substring(i), ";", false, true);
while (tok1.hasMoreTokens())
{
String token = tok1.nextToken();
StringTokenizer tok2 = new QuotedStringTokenizer(token, "= ");
if (tok2.hasMoreTokens())
{
String paramName = tok2.nextToken();
String paramVal = null;
if (tok2.hasMoreTokens()) paramVal = tok2.nextToken();
parameters.put(paramName, paramVal);
}
}
return value.substring(0, i).trim();
}
private static final Float __one = new Float("1.0");
private static final Float __zero = new Float("0.0");
private static final Trie<Float> __qualities = new ArrayTernaryTrie<>();
static
{
__qualities.put("*", __one);
__qualities.put("1.0", __one);
__qualities.put("1", __one);
__qualities.put("0.9", new Float("0.9"));
__qualities.put("0.8", new Float("0.8"));
__qualities.put("0.7", new Float("0.7"));
__qualities.put("0.66", new Float("0.66"));
__qualities.put("0.6", new Float("0.6"));
__qualities.put("0.5", new Float("0.5"));
__qualities.put("0.4", new Float("0.4"));
__qualities.put("0.33", new Float("0.33"));
__qualities.put("0.3", new Float("0.3"));
__qualities.put("0.2", new Float("0.2"));
__qualities.put("0.1", new Float("0.1"));
__qualities.put("0", __zero);
__qualities.put("0.0", __zero);
}
public static Float getQuality(String value)
{
if (value == null) return __zero;
int qe = value.indexOf(";");
if (qe++ < 0 || qe == value.length()) return __one;
if (value.charAt(qe++) == 'q')
{
qe++;
Float q = __qualities.get(value, qe, value.length() - qe);
if (q != null)
return q;
}
Map<String,String> params = new HashMap<>(4);
valueParameters(value, params);
String qs = params.get("q");
if (qs==null)
qs="*";
Float q = __qualities.get(qs);
if (q == null)
{
try
{
q = new Float(qs);
}
catch (Exception e)
{
q = __one;
}
}
return q;
}
/**
* List values in quality order.
*
* @param e Enumeration of values with quality parameters
* @return values in quality order.
*/
public static List<String> qualityList(Enumeration<String> e)
{
if (e == null || !e.hasMoreElements())
return Collections.emptyList();
Object list = null;
Object qual = null;
// Assume list will be well ordered and just add nonzero
while (e.hasMoreElements())
{
String v = e.nextElement();
Float q = getQuality(v);
if (q >= 0.001)
{
list = LazyList.add(list, v);
qual = LazyList.add(qual, q);
}
}
List<String> vl = LazyList.getList(list, false);
if (vl.size() < 2)
return vl;
List<Float> ql = LazyList.getList(qual, false);
// sort list with swaps
Float last = __zero;
for (int i = vl.size(); i-- > 0;)
{
Float q = ql.get(i);
if (last.compareTo(q) > 0)
{
String tmp = vl.get(i);
vl.set(i, vl.get(i + 1));
vl.set(i + 1, tmp);
ql.set(i, ql.get(i + 1));
ql.set(i + 1, q);
last = __zero;
i = vl.size();
continue;
}
last = q;
}
ql.clear();
return vl;
}
/* ------------------------------------------------------------ */
/** Does a cookie value need to be quoted?
* @param s value string
* @return true if quoted;
* @throws IllegalArgumentException If there a control characters in the string
*/
public static boolean isQuoteNeededForCookie(String s)
{
if (s==null || s.length()==0)
return true;
if (QuotedStringTokenizer.isQuoted(s))
return false;
for (int i=0;i<s.length();i++)
{
char c = s.charAt(i);
if (__COOKIE_DELIM.indexOf(c)>=0)
return true;
if (c<0x20 || c>=0x7f)
throw new IllegalArgumentException("Illegal character in cookie value");
}
return false;
}
private static void quoteOnlyOrAppend(StringBuilder buf, String s, boolean quote)
{
if (quote)
QuotedStringTokenizer.quoteOnly(buf,s);
else
buf.append(s);
}
}
