Source Code Cross Referenced for UrlEncoded.java in  » Sevlet-Container » jetty-modules » org » mortbay » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Sevlet Container » jetty modules » org.mortbay.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // ========================================================================
002:        // Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
003:        // ------------------------------------------------------------------------
004:        // Licensed under the Apache License, Version 2.0 (the "License");
005:        // you may not use this file except in compliance with the License.
006:        // You may obtain a copy of the License at 
007:        // http://www.apache.org/licenses/LICENSE-2.0
008:        // Unless required by applicable law or agreed to in writing, software
009:        // distributed under the License is distributed on an "AS IS" BASIS,
010:        // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
011:        // See the License for the specific language governing permissions and
012:        // limitations under the License.
013:        // ========================================================================
014:
015:        package org.mortbay.util;
016:
017:        import java.io.IOException;
018:        import java.io.InputStream;
019:        import java.io.UnsupportedEncodingException;
020:        import java.util.Iterator;
021:        import java.util.Map;
022:
023:        import org.mortbay.log.Log;
024:
025:        /* ------------------------------------------------------------ */
026:        /** Handles coding of MIME  "x-www-form-urlencoded".
027:         * This class handles the encoding and decoding for either
028:         * the query string of a URL or the _content of a POST HTTP request.
029:         *
030:         * <p><h4>Notes</h4>
031:         * The hashtable either contains String single values, vectors
032:         * of String or arrays of Strings.
033:         *
034:         * This class is only partially synchronised.  In particular, simple
035:         * get operations are not protected from concurrent updates.
036:         *
037:         * @see java.net.URLEncoder
038:         * @author Greg Wilkins (gregw)
039:         */
040:        public class UrlEncoded extends MultiMap {
041:
042:            /* ----------------------------------------------------------------- */
043:            public UrlEncoded(UrlEncoded url) {
044:                super (url);
045:            }
046:
047:            /* ----------------------------------------------------------------- */
048:            public UrlEncoded() {
049:                super (6);
050:            }
051:
052:            /* ----------------------------------------------------------------- */
053:            public UrlEncoded(String s) {
054:                super (6);
055:                decode(s, StringUtil.__UTF8);
056:            }
057:
058:            /* ----------------------------------------------------------------- */
059:            public UrlEncoded(String s, String charset) {
060:                super (6);
061:                decode(s, charset);
062:            }
063:
064:            /* ----------------------------------------------------------------- */
065:            public void decode(String query) {
066:                decodeTo(query, this , StringUtil.__UTF8);
067:            }
068:
069:            /* ----------------------------------------------------------------- */
070:            public void decode(String query, String charset) {
071:                decodeTo(query, this , charset);
072:            }
073:
074:            /* -------------------------------------------------------------- */
075:            /** Encode Hashtable with % encoding.
076:             */
077:            public String encode() {
078:                return encode(StringUtil.__UTF8, false);
079:            }
080:
081:            /* -------------------------------------------------------------- */
082:            /** Encode Hashtable with % encoding.
083:             */
084:            public String encode(String charset) {
085:                return encode(charset, false);
086:            }
087:
088:            /* -------------------------------------------------------------- */
089:            /** Encode Hashtable with % encoding.
090:             * @param equalsForNullValue if True, then an '=' is always used, even
091:             * for parameters without a value. e.g. "blah?a=&b=&c=".
092:             */
093:            public synchronized String encode(String charset,
094:                    boolean equalsForNullValue) {
095:                return encode(this , charset, equalsForNullValue);
096:            }
097:
098:            /* -------------------------------------------------------------- */
099:            /** Encode Hashtable with % encoding.
100:             * @param equalsForNullValue if True, then an '=' is always used, even
101:             * for parameters without a value. e.g. "blah?a=&b=&c=".
102:             */
103:            public static String encode(MultiMap map, String charset,
104:                    boolean equalsForNullValue) {
105:                if (charset == null)
106:                    charset = StringUtil.__UTF8;
107:
108:                StringBuffer result = new StringBuffer(128);
109:                synchronized (result) {
110:                    Iterator iter = map.entrySet().iterator();
111:                    while (iter.hasNext()) {
112:                        Map.Entry entry = (Map.Entry) iter.next();
113:
114:                        String key = entry.getKey().toString();
115:                        Object list = entry.getValue();
116:                        int s = LazyList.size(list);
117:
118:                        if (s == 0) {
119:                            result.append(encodeString(key, charset));
120:                            if (equalsForNullValue)
121:                                result.append('=');
122:                        } else {
123:                            for (int i = 0; i < s; i++) {
124:                                if (i > 0)
125:                                    result.append('&');
126:                                Object val = LazyList.get(list, i);
127:                                result.append(encodeString(key, charset));
128:
129:                                if (val != null) {
130:                                    String str = val.toString();
131:                                    if (str.length() > 0) {
132:                                        result.append('=');
133:                                        result
134:                                                .append(encodeString(str,
135:                                                        charset));
136:                                    } else if (equalsForNullValue)
137:                                        result.append('=');
138:                                } else if (equalsForNullValue)
139:                                    result.append('=');
140:                            }
141:                        }
142:                        if (iter.hasNext())
143:                            result.append('&');
144:                    }
145:                    return result.toString();
146:                }
147:            }
148:
149:            /* -------------------------------------------------------------- */
150:            /** Decoded parameters to Map.
151:             * @param content the string containing the encoded parameters
152:             */
153:            public static void decodeTo(String content, MultiMap map,
154:                    String charset) {
155:                if (charset == null)
156:                    charset = StringUtil.__UTF8;
157:
158:                synchronized (map) {
159:                    String key = null;
160:                    String value = null;
161:                    int mark = -1;
162:                    boolean encoded = false;
163:                    for (int i = 0; i < content.length(); i++) {
164:                        char c = content.charAt(i);
165:                        switch (c) {
166:                        case '&':
167:                            int l = i - mark - 1;
168:                            value = l == 0 ? "" : (encoded ? decodeString(
169:                                    content, mark + 1, l, charset) : content
170:                                    .substring(mark + 1, i));
171:                            mark = i;
172:                            encoded = false;
173:                            if (key != null) {
174:                                map.add(key, value);
175:                            } else if (value != null && value.length() > 0) {
176:                                map.add(value, "");
177:                            }
178:                            key = null;
179:                            value = null;
180:                            break;
181:                        case '=':
182:                            if (key != null)
183:                                break;
184:                            key = encoded ? decodeString(content, mark + 1, i
185:                                    - mark - 1, charset) : content.substring(
186:                                    mark + 1, i);
187:                            mark = i;
188:                            encoded = false;
189:                            break;
190:                        case '+':
191:                            encoded = true;
192:                            break;
193:                        case '%':
194:                            encoded = true;
195:                            break;
196:                        }
197:                    }
198:
199:                    if (key != null) {
200:                        int l = content.length() - mark - 1;
201:                        value = l == 0 ? "" : (encoded ? decodeString(content,
202:                                mark + 1, l, charset) : content
203:                                .substring(mark + 1));
204:                        map.add(key, value);
205:                    } else if (mark < content.length()) {
206:                        key = encoded ? decodeString(content, mark + 1, content
207:                                .length()
208:                                - mark - 1, charset) : content
209:                                .substring(mark + 1);
210:                        map.add(key, "");
211:                    }
212:                }
213:            }
214:
215:            /* -------------------------------------------------------------- */
216:            /** Decoded parameters to Map.
217:             * @param data the byte[] containing the encoded parameters
218:             */
219:            public static void decodeUtf8To(byte[] raw, int offset, int length,
220:                    MultiMap map) {
221:                synchronized (map) {
222:                    Utf8StringBuffer buffer = new Utf8StringBuffer();
223:                    String key = null;
224:                    String value = null;
225:
226:                    // TODO cache of parameter names ???
227:                    int end = offset + length;
228:                    for (int i = offset; i < end; i++) {
229:                        byte b = raw[i];
230:                        switch ((char) (0xff & b)) {
231:                        case '&':
232:                            value = buffer.length() == 0 ? "" : buffer
233:                                    .toString();
234:                            buffer.reset();
235:                            if (key != null) {
236:                                map.add(key, value);
237:                            } else if (value != null && value.length() > 0) {
238:                                map.add(value, "");
239:                            }
240:                            key = null;
241:                            value = null;
242:                            break;
243:
244:                        case '=':
245:                            if (key != null) {
246:                                buffer.append(b);
247:                                break;
248:                            }
249:                            key = buffer.toString();
250:                            buffer.reset();
251:                            break;
252:
253:                        case '+':
254:                            buffer.append((byte) ' ');
255:                            break;
256:
257:                        case '%':
258:                            if (i + 2 < end)
259:                                buffer
260:                                        .append((byte) ((TypeUtil
261:                                                .convertHexDigit(raw[++i]) << 4) + TypeUtil
262:                                                .convertHexDigit(raw[++i])));
263:                            break;
264:                        default:
265:                            buffer.append(b);
266:                            break;
267:                        }
268:                    }
269:
270:                    if (key != null) {
271:                        value = buffer.length() == 0 ? "" : buffer.toString();
272:                        buffer.reset();
273:                        map.add(key, value);
274:                    } else if (buffer.length() > 0) {
275:                        map.add(buffer.toString(), "");
276:                    }
277:                }
278:            }
279:
280:            /* -------------------------------------------------------------- */
281:            /** Decoded parameters to Map.
282:             * @param in InputSteam to read
283:             * @param map MultiMap to add parameters to
284:             * @param maxLength maximum length of conent to read 0r -1 for no limit
285:             */
286:            public static void decodeUtf8To(InputStream in, MultiMap map,
287:                    int maxLength) throws IOException {
288:                synchronized (map) {
289:                    Utf8StringBuffer buffer = new Utf8StringBuffer();
290:                    String key = null;
291:                    String value = null;
292:
293:                    int b;
294:
295:                    // TODO cache of parameter names ???
296:                    int totalLength = 0;
297:                    while ((b = in.read()) >= 0) {
298:                        switch ((char) b) {
299:                        case '&':
300:                            value = buffer.length() == 0 ? "" : buffer
301:                                    .toString();
302:                            buffer.reset();
303:                            if (key != null) {
304:                                map.add(key, value);
305:                            } else if (value != null && value.length() > 0) {
306:                                map.add(value, "");
307:                            }
308:                            key = null;
309:                            value = null;
310:                            break;
311:
312:                        case '=':
313:                            if (key != null) {
314:                                buffer.append((byte) b);
315:                                break;
316:                            }
317:                            key = buffer.toString();
318:                            buffer.reset();
319:                            break;
320:
321:                        case '+':
322:                            buffer.append((byte) ' ');
323:                            break;
324:
325:                        case '%':
326:                            int dh = in.read();
327:                            int dl = in.read();
328:                            if (dh < 0 || dl < 0)
329:                                break;
330:                            buffer
331:                                    .append((byte) ((TypeUtil
332:                                            .convertHexDigit((byte) dh) << 4) + TypeUtil
333:                                            .convertHexDigit((byte) dl)));
334:                            break;
335:                        default:
336:                            buffer.append((byte) b);
337:                            break;
338:                        }
339:                        if (maxLength >= 0 && (++totalLength > maxLength))
340:                            throw new IllegalStateException("Form too large");
341:                    }
342:
343:                    if (key != null) {
344:                        value = buffer.length() == 0 ? "" : buffer.toString();
345:                        buffer.reset();
346:                        map.add(key, value);
347:                    } else if (buffer.length() > 0) {
348:                        map.add(buffer.toString(), "");
349:                    }
350:                }
351:            }
352:
353:            /* -------------------------------------------------------------- */
354:            /** Decoded parameters to Map.
355:             * @param in the stream containing the encoded parameters
356:             */
357:            public static void decodeTo(InputStream in, MultiMap map,
358:                    String charset, int maxLength) throws IOException {
359:                if (charset == null
360:                        || StringUtil.__UTF8.equalsIgnoreCase(charset)) {
361:                    decodeUtf8To(in, map, maxLength);
362:                    return;
363:                }
364:
365:                synchronized (map) {
366:                    ByteArrayOutputStream2 buf = new ByteArrayOutputStream2(256);
367:                    String key = null;
368:                    String value = null;
369:
370:                    int c;
371:                    int digit = 0;
372:                    int digits = 0;
373:
374:                    // TODO cache of parameter names ???
375:                    byte[] bytes = new byte[256]; // TODO Configure ?? size??? tune??? // reuse???
376:                    int l = -1;
377:                    int totalLength = 0;
378:                    while ((l = in.read(bytes)) >= 0) {
379:                        for (int i = 0; i < l; i++) {
380:                            c = bytes[i];
381:                            switch ((char) c) {
382:                            case '&':
383:                                value = buf.size() == 0 ? "" : new String(buf
384:                                        .getBuf(), 0, buf.size(), charset);
385:                                buf.reset();
386:                                if (key != null) {
387:                                    map.add(key, value);
388:                                } else if (value != null && value.length() > 0) {
389:                                    map.add(value, "");
390:                                }
391:                                key = null;
392:                                value = null;
393:                                break;
394:                            case '=':
395:                                if (key != null) {
396:                                    buf.write(c);
397:                                    break;
398:                                }
399:                                key = new String(buf.getBuf(), 0, buf.size(),
400:                                        charset);
401:                                buf.reset();
402:                                break;
403:                            case '+':
404:                                buf.write(' ');
405:                                break;
406:                            case '%':
407:                                digits = 2;
408:                                break;
409:                            default:
410:                                if (digits == 2) {
411:                                    digit = TypeUtil.convertHexDigit((byte) c);
412:                                    digits = 1;
413:                                } else if (digits == 1) {
414:                                    buf.write((digit << 4)
415:                                            + TypeUtil
416:                                                    .convertHexDigit((byte) c));
417:                                    digits = 0;
418:                                } else
419:                                    buf.write(c);
420:                                break;
421:                            }
422:                        }
423:
424:                        totalLength += l;
425:                        if (maxLength >= 0 && totalLength > maxLength)
426:                            throw new IllegalStateException("Form too large");
427:                    }
428:
429:                    if (key != null) {
430:                        value = buf.size() == 0 ? "" : new String(buf.getBuf(),
431:                                0, buf.size(), charset);
432:                        buf.reset();
433:                        map.add(key, value);
434:                    } else if (buf.size() > 0) {
435:                        map
436:                                .add(new String(buf.getBuf(), 0, buf.size(),
437:                                        charset), "");
438:                    }
439:
440:                }
441:            }
442:
443:            /* -------------------------------------------------------------- */
444:            /** Decode String with % encoding.
445:             * This method makes the assumption that the majority of calls
446:             * will need no decoding.
447:             */
448:            public static String decodeString(String encoded, int offset,
449:                    int length, String charset) {
450:                if (charset == null)
451:                    charset = StringUtil.__UTF8;
452:                byte[] bytes = null;
453:                int n = 0;
454:
455:                for (int i = 0; i < length; i++) {
456:                    char c = encoded.charAt(offset + i);
457:                    if (c < 0 || c > 0xff)
458:                        throw new IllegalArgumentException("Not encoded");
459:
460:                    if (c == '+') {
461:                        if (bytes == null) {
462:                            bytes = new byte[length * 2];
463:                            encoded.getBytes(offset, offset + i, bytes, 0);
464:                            n = i;
465:                        }
466:                        bytes[n++] = (byte) ' ';
467:                    } else if (c == '%' && (i + 2) < length) {
468:                        byte b;
469:                        char cn = encoded.charAt(offset + i + 1);
470:                        if (cn >= 'a' && cn <= 'z')
471:                            b = (byte) (10 + cn - 'a');
472:                        else if (cn >= 'A' && cn <= 'Z')
473:                            b = (byte) (10 + cn - 'A');
474:                        else
475:                            b = (byte) (cn - '0');
476:                        cn = encoded.charAt(offset + i + 2);
477:                        if (cn >= 'a' && cn <= 'z')
478:                            b = (byte) (b * 16 + 10 + cn - 'a');
479:                        else if (cn >= 'A' && cn <= 'Z')
480:                            b = (byte) (b * 16 + 10 + cn - 'A');
481:                        else
482:                            b = (byte) (b * 16 + cn - '0');
483:
484:                        if (bytes == null) {
485:                            bytes = new byte[length];
486:                            encoded.getBytes(offset, offset + i, bytes, 0);
487:                            n = i;
488:                        }
489:                        i += 2;
490:                        bytes[n++] = b;
491:                    } else if (n > 0)
492:                        bytes[n++] = (byte) c;
493:                }
494:
495:                if (bytes == null) {
496:                    if (offset == 0 && encoded.length() == length)
497:                        return encoded;
498:                    return encoded.substring(offset, offset + length);
499:                }
500:
501:                try {
502:                    return new String(bytes, 0, n, charset);
503:                } catch (UnsupportedEncodingException e) {
504:                    Log.warn(e.toString());
505:                    Log.debug(e);
506:                    return new String(bytes, 0, n);
507:                }
508:
509:            }
510:
511:            /* ------------------------------------------------------------ */
512:            /** Perform URL encoding.
513:             * Assumes 8859 charset
514:             * @param string 
515:             * @return encoded string.
516:             */
517:            public static String encodeString(String string) {
518:                return encodeString(string, StringUtil.__UTF8);
519:            }
520:
521:            /* ------------------------------------------------------------ */
522:            /** Perform URL encoding.
523:             * @param string 
524:             * @return encoded string.
525:             */
526:            public static String encodeString(String string, String charset) {
527:                if (charset == null)
528:                    charset = StringUtil.__UTF8;
529:                byte[] bytes = null;
530:                try {
531:                    bytes = string.getBytes(charset);
532:                } catch (UnsupportedEncodingException e) {
533:                    // Log.warn(LogSupport.EXCEPTION,e);
534:                    bytes = string.getBytes();
535:                }
536:
537:                int len = bytes.length;
538:                byte[] encoded = new byte[bytes.length * 3];
539:                int n = 0;
540:                boolean noEncode = true;
541:
542:                for (int i = 0; i < len; i++) {
543:                    byte b = bytes[i];
544:
545:                    if (b == ' ') {
546:                        noEncode = false;
547:                        encoded[n++] = (byte) '+';
548:                    } else if (b >= 'a' && b <= 'z' || b >= 'A' && b <= 'Z'
549:                            || b >= '0' && b <= '9') {
550:                        encoded[n++] = b;
551:                    } else {
552:                        noEncode = false;
553:                        encoded[n++] = (byte) '%';
554:                        byte nibble = (byte) ((b & 0xf0) >> 4);
555:                        if (nibble >= 10)
556:                            encoded[n++] = (byte) ('A' + nibble - 10);
557:                        else
558:                            encoded[n++] = (byte) ('0' + nibble);
559:                        nibble = (byte) (b & 0xf);
560:                        if (nibble >= 10)
561:                            encoded[n++] = (byte) ('A' + nibble - 10);
562:                        else
563:                            encoded[n++] = (byte) ('0' + nibble);
564:                    }
565:                }
566:
567:                if (noEncode)
568:                    return string;
569:
570:                try {
571:                    return new String(encoded, 0, n, charset);
572:                } catch (UnsupportedEncodingException e) {
573:                    // Log.warn(LogSupport.EXCEPTION,e);
574:                    return new String(encoded, 0, n);
575:                }
576:            }
577:
578:            /* ------------------------------------------------------------ */
579:            /** 
580:             */
581:            public Object clone() {
582:                return new UrlEncoded(this);
583:            }
584:        }
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