author | chegar |
Fri, 16 Sep 2011 12:09:04 -0700 | |
changeset 10596 | 39b3a979e600 |
parent 7668 | d4a77089c587 |
child 14766 | 1f22dd6f2658 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved. |
2 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
|
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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||
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/*- |
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* news stream opener |
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*/ |
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||
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package sun.net.www; |
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||
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import java.io.*; |
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import java.util.Collections; |
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import java.util.Map; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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||
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/** An RFC 844 or MIME message header. Includes methods |
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for parsing headers from incoming streams, fetching |
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values, setting values, and printing headers. |
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Key values of null are legal: they indicate lines in |
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the header that don't have a valid key, but do have |
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a value (this isn't legal according to the standard, |
|
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but lines like this are everywhere). */ |
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public |
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class MessageHeader { |
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private String keys[]; |
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private String values[]; |
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private int nkeys; |
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||
54 |
public MessageHeader () { |
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grow(); |
|
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} |
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||
58 |
public MessageHeader (InputStream is) throws java.io.IOException { |
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parseHeader(is); |
|
60 |
} |
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61 |
||
62 |
/** |
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* Reset a message header (all key/values removed) |
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*/ |
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public synchronized void reset() { |
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keys = null; |
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values = null; |
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nkeys = 0; |
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grow(); |
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} |
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||
72 |
/** |
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* Find the value that corresponds to this key. |
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* It finds only the first occurrence of the key. |
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* @param k the key to find. |
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* @return null if not found. |
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*/ |
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78 |
public synchronized String findValue(String k) { |
|
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if (k == null) { |
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80 |
for (int i = nkeys; --i >= 0;) |
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if (keys[i] == null) |
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return values[i]; |
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} else |
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for (int i = nkeys; --i >= 0;) { |
|
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if (k.equalsIgnoreCase(keys[i])) |
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return values[i]; |
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} |
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return null; |
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} |
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91 |
// return the location of the key |
|
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public synchronized int getKey(String k) { |
|
93 |
for (int i = nkeys; --i >= 0;) |
|
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if ((keys[i] == k) || |
|
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(k != null && k.equalsIgnoreCase(keys[i]))) |
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return i; |
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return -1; |
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} |
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100 |
public synchronized String getKey(int n) { |
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101 |
if (n < 0 || n >= nkeys) return null; |
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return keys[n]; |
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} |
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public synchronized String getValue(int n) { |
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if (n < 0 || n >= nkeys) return null; |
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return values[n]; |
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} |
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/** Deprecated: Use multiValueIterator() instead. |
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* |
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* Find the next value that corresponds to this key. |
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* It finds the first value that follows v. To iterate |
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* over all the values of a key use: |
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* <pre> |
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116 |
* for(String v=h.findValue(k); v!=null; v=h.findNextValue(k, v)) { |
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* ... |
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* } |
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* </pre> |
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*/ |
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121 |
public synchronized String findNextValue(String k, String v) { |
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122 |
boolean foundV = false; |
|
123 |
if (k == null) { |
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124 |
for (int i = nkeys; --i >= 0;) |
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125 |
if (keys[i] == null) |
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if (foundV) |
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return values[i]; |
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else if (values[i] == v) |
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foundV = true; |
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} else |
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131 |
for (int i = nkeys; --i >= 0;) |
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132 |
if (k.equalsIgnoreCase(keys[i])) |
|
133 |
if (foundV) |
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return values[i]; |
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135 |
else if (values[i] == v) |
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foundV = true; |
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return null; |
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} |
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||
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class HeaderIterator implements Iterator<String> { |
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int index = 0; |
142 |
int next = -1; |
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143 |
String key; |
|
144 |
boolean haveNext = false; |
|
145 |
Object lock; |
|
146 |
||
147 |
public HeaderIterator (String k, Object lock) { |
|
148 |
key = k; |
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149 |
this.lock = lock; |
|
150 |
} |
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151 |
public boolean hasNext () { |
|
152 |
synchronized (lock) { |
|
153 |
if (haveNext) { |
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154 |
return true; |
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155 |
} |
|
156 |
while (index < nkeys) { |
|
157 |
if (key.equalsIgnoreCase (keys[index])) { |
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haveNext = true; |
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next = index++; |
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160 |
return true; |
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} |
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162 |
index ++; |
|
163 |
} |
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164 |
return false; |
|
165 |
} |
|
166 |
} |
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public String next() { |
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synchronized (lock) { |
169 |
if (haveNext) { |
|
170 |
haveNext = false; |
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171 |
return values [next]; |
|
172 |
} |
|
173 |
if (hasNext()) { |
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return next(); |
|
175 |
} else { |
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176 |
throw new NoSuchElementException ("No more elements"); |
|
177 |
} |
|
178 |
} |
|
179 |
} |
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180 |
public void remove () { |
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181 |
throw new UnsupportedOperationException ("remove not allowed"); |
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} |
|
183 |
} |
|
184 |
||
185 |
/** |
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186 |
* return an Iterator that returns all values of a particular |
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187 |
* key in sequence |
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188 |
*/ |
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51 | 189 |
public Iterator<String> multiValueIterator (String k) { |
2 | 190 |
return new HeaderIterator (k, this); |
191 |
} |
|
192 |
||
51 | 193 |
public synchronized Map<String, List<String>> getHeaders() { |
2 | 194 |
return getHeaders(null); |
195 |
} |
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196 |
||
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public synchronized Map<String, List<String>> getHeaders(String[] excludeList) { |
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return filterAndAddHeaders(excludeList, null); |
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} |
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public synchronized Map<String, List<String>> filterAndAddHeaders( |
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String[] excludeList, Map<String, List<String>> include) { |
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boolean skipIt = false; |
51 | 204 |
Map<String, List<String>> m = new HashMap<String, List<String>>(); |
2 | 205 |
for (int i = nkeys; --i >= 0;) { |
206 |
if (excludeList != null) { |
|
207 |
// check if the key is in the excludeList. |
|
208 |
// if so, don't include it in the Map. |
|
209 |
for (int j = 0; j < excludeList.length; j++) { |
|
210 |
if ((excludeList[j] != null) && |
|
211 |
(excludeList[j].equalsIgnoreCase(keys[i]))) { |
|
212 |
skipIt = true; |
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213 |
break; |
|
214 |
} |
|
215 |
} |
|
216 |
} |
|
217 |
if (!skipIt) { |
|
51 | 218 |
List<String> l = m.get(keys[i]); |
2 | 219 |
if (l == null) { |
51 | 220 |
l = new ArrayList<String>(); |
2 | 221 |
m.put(keys[i], l); |
222 |
} |
|
223 |
l.add(values[i]); |
|
224 |
} else { |
|
225 |
// reset the flag |
|
226 |
skipIt = false; |
|
227 |
} |
|
228 |
} |
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if (include != null) { |
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for (Map.Entry<String,List<String>> entry: include.entrySet()) { |
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List<String> l = m.get(entry.getKey()); |
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if (l == null) { |
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l = new ArrayList<String>(); |
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m.put(entry.getKey(), l); |
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} |
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l.addAll(entry.getValue()); |
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} |
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} |
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|
51 | 241 |
for (String key : m.keySet()) { |
242 |
m.put(key, Collections.unmodifiableList(m.get(key))); |
|
2 | 243 |
} |
244 |
||
245 |
return Collections.unmodifiableMap(m); |
|
246 |
} |
|
247 |
||
248 |
/** Prints the key-value pairs represented by this |
|
249 |
header. Also prints the RFC required blank line |
|
250 |
at the end. Omits pairs with a null key. */ |
|
251 |
public synchronized void print(PrintStream p) { |
|
252 |
for (int i = 0; i < nkeys; i++) |
|
253 |
if (keys[i] != null) { |
|
254 |
p.print(keys[i] + |
|
255 |
(values[i] != null ? ": "+values[i]: "") + "\r\n"); |
|
256 |
} |
|
257 |
p.print("\r\n"); |
|
258 |
p.flush(); |
|
259 |
} |
|
260 |
||
261 |
/** Adds a key value pair to the end of the |
|
262 |
header. Duplicates are allowed */ |
|
263 |
public synchronized void add(String k, String v) { |
|
264 |
grow(); |
|
265 |
keys[nkeys] = k; |
|
266 |
values[nkeys] = v; |
|
267 |
nkeys++; |
|
268 |
} |
|
269 |
||
270 |
/** Prepends a key value pair to the beginning of the |
|
271 |
header. Duplicates are allowed */ |
|
272 |
public synchronized void prepend(String k, String v) { |
|
273 |
grow(); |
|
274 |
for (int i = nkeys; i > 0; i--) { |
|
275 |
keys[i] = keys[i-1]; |
|
276 |
values[i] = values[i-1]; |
|
277 |
} |
|
278 |
keys[0] = k; |
|
279 |
values[0] = v; |
|
280 |
nkeys++; |
|
281 |
} |
|
282 |
||
283 |
/** Overwrite the previous key/val pair at location 'i' |
|
284 |
* with the new k/v. If the index didn't exist before |
|
285 |
* the key/val is simply tacked onto the end. |
|
286 |
*/ |
|
287 |
||
288 |
public synchronized void set(int i, String k, String v) { |
|
289 |
grow(); |
|
290 |
if (i < 0) { |
|
291 |
return; |
|
292 |
} else if (i >= nkeys) { |
|
293 |
add(k, v); |
|
294 |
} else { |
|
295 |
keys[i] = k; |
|
296 |
values[i] = v; |
|
297 |
} |
|
298 |
} |
|
299 |
||
300 |
||
301 |
/** grow the key/value arrays as needed */ |
|
302 |
||
303 |
private void grow() { |
|
304 |
if (keys == null || nkeys >= keys.length) { |
|
305 |
String[] nk = new String[nkeys + 4]; |
|
306 |
String[] nv = new String[nkeys + 4]; |
|
307 |
if (keys != null) |
|
308 |
System.arraycopy(keys, 0, nk, 0, nkeys); |
|
309 |
if (values != null) |
|
310 |
System.arraycopy(values, 0, nv, 0, nkeys); |
|
311 |
keys = nk; |
|
312 |
values = nv; |
|
313 |
} |
|
314 |
} |
|
315 |
||
316 |
/** |
|
317 |
* Remove the key from the header. If there are multiple values under |
|
318 |
* the same key, they are all removed. |
|
319 |
* Nothing is done if the key doesn't exist. |
|
320 |
* After a remove, the other pairs' order are not changed. |
|
321 |
* @param k the key to remove |
|
322 |
*/ |
|
323 |
public synchronized void remove(String k) { |
|
324 |
if(k == null) { |
|
325 |
for (int i = 0; i < nkeys; i++) { |
|
326 |
while (keys[i] == null && i < nkeys) { |
|
327 |
for(int j=i; j<nkeys-1; j++) { |
|
328 |
keys[j] = keys[j+1]; |
|
329 |
values[j] = values[j+1]; |
|
330 |
} |
|
331 |
nkeys--; |
|
332 |
} |
|
333 |
} |
|
334 |
} else { |
|
335 |
for (int i = 0; i < nkeys; i++) { |
|
336 |
while (k.equalsIgnoreCase(keys[i]) && i < nkeys) { |
|
337 |
for(int j=i; j<nkeys-1; j++) { |
|
338 |
keys[j] = keys[j+1]; |
|
339 |
values[j] = values[j+1]; |
|
340 |
} |
|
341 |
nkeys--; |
|
342 |
} |
|
343 |
} |
|
344 |
} |
|
345 |
} |
|
346 |
||
347 |
/** Sets the value of a key. If the key already |
|
348 |
exists in the header, it's value will be |
|
349 |
changed. Otherwise a new key/value pair will |
|
350 |
be added to the end of the header. */ |
|
351 |
public synchronized void set(String k, String v) { |
|
352 |
for (int i = nkeys; --i >= 0;) |
|
353 |
if (k.equalsIgnoreCase(keys[i])) { |
|
354 |
values[i] = v; |
|
355 |
return; |
|
356 |
} |
|
357 |
add(k, v); |
|
358 |
} |
|
359 |
||
360 |
/** Set's the value of a key only if there is no |
|
361 |
* key with that value already. |
|
362 |
*/ |
|
363 |
||
364 |
public synchronized void setIfNotSet(String k, String v) { |
|
365 |
if (findValue(k) == null) { |
|
366 |
add(k, v); |
|
367 |
} |
|
368 |
} |
|
369 |
||
370 |
/** Convert a message-id string to canonical form (strips off |
|
371 |
leading and trailing <>s) */ |
|
372 |
public static String canonicalID(String id) { |
|
373 |
if (id == null) |
|
374 |
return ""; |
|
375 |
int st = 0; |
|
376 |
int len = id.length(); |
|
377 |
boolean substr = false; |
|
378 |
int c; |
|
379 |
while (st < len && ((c = id.charAt(st)) == '<' || |
|
380 |
c <= ' ')) { |
|
381 |
st++; |
|
382 |
substr = true; |
|
383 |
} |
|
384 |
while (st < len && ((c = id.charAt(len - 1)) == '>' || |
|
385 |
c <= ' ')) { |
|
386 |
len--; |
|
387 |
substr = true; |
|
388 |
} |
|
389 |
return substr ? id.substring(st, len) : id; |
|
390 |
} |
|
391 |
||
392 |
/** Parse a MIME header from an input stream. */ |
|
393 |
public void parseHeader(InputStream is) throws java.io.IOException { |
|
394 |
synchronized (this) { |
|
395 |
nkeys = 0; |
|
396 |
} |
|
397 |
mergeHeader(is); |
|
398 |
} |
|
399 |
||
400 |
/** Parse and merge a MIME header from an input stream. */ |
|
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401 |
@SuppressWarnings("fallthrough") |
2 | 402 |
public void mergeHeader(InputStream is) throws java.io.IOException { |
403 |
if (is == null) |
|
404 |
return; |
|
405 |
char s[] = new char[10]; |
|
406 |
int firstc = is.read(); |
|
407 |
while (firstc != '\n' && firstc != '\r' && firstc >= 0) { |
|
408 |
int len = 0; |
|
409 |
int keyend = -1; |
|
410 |
int c; |
|
411 |
boolean inKey = firstc > ' '; |
|
412 |
s[len++] = (char) firstc; |
|
413 |
parseloop:{ |
|
414 |
while ((c = is.read()) >= 0) { |
|
415 |
switch (c) { |
|
416 |
case ':': |
|
417 |
if (inKey && len > 0) |
|
418 |
keyend = len; |
|
419 |
inKey = false; |
|
420 |
break; |
|
421 |
case '\t': |
|
422 |
c = ' '; |
|
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423 |
/*fall through*/ |
2 | 424 |
case ' ': |
425 |
inKey = false; |
|
426 |
break; |
|
427 |
case '\r': |
|
428 |
case '\n': |
|
429 |
firstc = is.read(); |
|
430 |
if (c == '\r' && firstc == '\n') { |
|
431 |
firstc = is.read(); |
|
432 |
if (firstc == '\r') |
|
433 |
firstc = is.read(); |
|
434 |
} |
|
435 |
if (firstc == '\n' || firstc == '\r' || firstc > ' ') |
|
436 |
break parseloop; |
|
437 |
/* continuation */ |
|
438 |
c = ' '; |
|
439 |
break; |
|
440 |
} |
|
441 |
if (len >= s.length) { |
|
442 |
char ns[] = new char[s.length * 2]; |
|
443 |
System.arraycopy(s, 0, ns, 0, len); |
|
444 |
s = ns; |
|
445 |
} |
|
446 |
s[len++] = (char) c; |
|
447 |
} |
|
448 |
firstc = -1; |
|
449 |
} |
|
450 |
while (len > 0 && s[len - 1] <= ' ') |
|
451 |
len--; |
|
452 |
String k; |
|
453 |
if (keyend <= 0) { |
|
454 |
k = null; |
|
455 |
keyend = 0; |
|
456 |
} else { |
|
457 |
k = String.copyValueOf(s, 0, keyend); |
|
458 |
if (keyend < len && s[keyend] == ':') |
|
459 |
keyend++; |
|
460 |
while (keyend < len && s[keyend] <= ' ') |
|
461 |
keyend++; |
|
462 |
} |
|
463 |
String v; |
|
464 |
if (keyend >= len) |
|
465 |
v = new String(); |
|
466 |
else |
|
467 |
v = String.copyValueOf(s, keyend, len - keyend); |
|
468 |
add(k, v); |
|
469 |
} |
|
470 |
} |
|
471 |
||
472 |
public synchronized String toString() { |
|
473 |
String result = super.toString() + nkeys + " pairs: "; |
|
474 |
for (int i = 0; i < keys.length && i < nkeys; i++) { |
|
475 |
result += "{"+keys[i]+": "+values[i]+"}"; |
|
476 |
} |
|
477 |
return result; |
|
478 |
} |
|
479 |
} |