2 rcs_id('$Id: ziplib.php,v 1.2 2001-01-01 23:13:32 ahollosi Exp $');
4 //FIXME: get rid of this.
7 echo "<br><b>Warning:</b> " . htmlspecialchars($msg) . "<br>\n";
13 * Note that we use gzopen()/gzwrite() instead of gzcompress() even
14 * if gzcompress() is available. Gzcompress() puts out data with different
15 * headers --- in particular it includes an "adler-32" checksum rather than
16 * a "CRC32" checksum. Since we need the CRC-32 checksum, and since not
17 * all PHP's have gzcompress(), we'll just stick with gzopen().
19 function gzip_cleanup () {
23 @unlink($gzip_tmpfile);
26 function gzip_tempnam () {
31 //FIXME: does this work on non-unix machines?
32 $gzip_tmpfile = tempnam("/tmp", "wkzip");
33 register_shutdown_function("gzip_cleanup");
38 function gzip_compress ($data) {
39 $filename = gzip_tempnam();
40 if (!($fp = gzopen($filename, "wb")))
42 gzwrite($fp, $data, strlen($data));
44 die("gzclose failed");
46 $size = filesize($filename);
48 if (!($fp = fopen($filename, "rb")))
50 if (!($z = fread($fp, $size)) || strlen($z) != $size)
59 function gzip_uncompress ($data) {
60 $filename = gzip_tempnam();
61 if (!($fp = fopen($filename, "wb")))
63 fwrite($fp, $data, strlen($data));
67 if (!($fp = gzopen($filename, "rb")))
69 while ($buf = gzread($fp, 4096))
72 die("gzclose failed");
79 * CRC32 computation. Hacked from Info-zip's zip-2.3 source code.
81 /* NOTE: The range of PHP ints seems to be -0x80000000 to 0x7fffffff.
82 * So, had to munge these constants.
84 $zip_crc_table = array (
85 0x00000000, 0x77073096, -0x11f19ed4, -0x66f6ae46, 0x076dc419,
86 0x706af48f, -0x169c5acb, -0x619b6a5d, 0x0edb8832, 0x79dcb8a4,
87 -0x1f2a16e2, -0x682d2678, 0x09b64c2b, 0x7eb17cbd, -0x1847d2f9,
88 -0x6f40e26f, 0x1db71064, 0x6ab020f2, -0x0c468eb8, -0x7b41be22,
89 0x1adad47d, 0x6ddde4eb, -0x0b2b4aaf, -0x7c2c7a39, 0x136c9856,
90 0x646ba8c0, -0x029d0686, -0x759a3614, 0x14015c4f, 0x63066cd9,
91 -0x05f0c29d, -0x72f7f20b, 0x3b6e20c8, 0x4c69105e, -0x2a9fbe1c,
92 -0x5d988e8e, 0x3c03e4d1, 0x4b04d447, -0x2df27a03, -0x5af54a95,
93 0x35b5a8fa, 0x42b2986c, -0x2444362a, -0x534306c0, 0x32d86ce3,
94 0x45df5c75, -0x2329f231, -0x542ec2a7, 0x26d930ac, 0x51de003a,
95 -0x3728ae80, -0x402f9eea, 0x21b4f4b5, 0x56b3c423, -0x30456a67,
96 -0x47425af1, 0x2802b89e, 0x5f058808, -0x39f3264e, -0x4ef416dc,
97 0x2f6f7c87, 0x58684c11, -0x3e9ee255, -0x4999d2c3, 0x76dc4190,
98 0x01db7106, -0x672ddf44, -0x102aefd6, 0x71b18589, 0x06b6b51f,
99 -0x60401b5b, -0x17472bcd, 0x7807c9a2, 0x0f00f934, -0x69f65772,
100 -0x1ef167e8, 0x7f6a0dbb, 0x086d3d2d, -0x6e9b9369, -0x199ca3ff,
101 0x6b6b51f4, 0x1c6c6162, -0x7a9acf28, -0x0d9dffb2, 0x6c0695ed,
102 0x1b01a57b, -0x7df70b3f, -0x0af03ba9, 0x65b0d9c6, 0x12b7e950,
103 -0x74414716, -0x03467784, 0x62dd1ddf, 0x15da2d49, -0x732c830d,
104 -0x042bb39b, 0x4db26158, 0x3ab551ce, -0x5c43ff8c, -0x2b44cf1e,
105 0x4adfa541, 0x3dd895d7, -0x5b2e3b93, -0x2c290b05, 0x4369e96a,
106 0x346ed9fc, -0x529877ba, -0x259f4730, 0x44042d73, 0x33031de5,
107 -0x55f5b3a1, -0x22f28337, 0x5005713c, 0x270241aa, -0x41f4eff0,
108 -0x36f3df7a, 0x5768b525, 0x206f85b3, -0x46992bf7, -0x319e1b61,
109 0x5edef90e, 0x29d9c998, -0x4f2f67de, -0x3828574c, 0x59b33d17,
110 0x2eb40d81, -0x4842a3c5, -0x3f459353, -0x12477ce0, -0x65404c4a,
111 0x03b6e20c, 0x74b1d29a, -0x152ab8c7, -0x622d8851, 0x04db2615,
112 0x73dc1683, -0x1c9cf4ee, -0x6b9bc47c, 0x0d6d6a3e, 0x7a6a5aa8,
113 -0x1bf130f5, -0x6cf60063, 0x0a00ae27, 0x7d079eb1, -0x0ff06cbc,
114 -0x78f75c2e, 0x1e01f268, 0x6906c2fe, -0x089da8a3, -0x7f9a9835,
115 0x196c3671, 0x6e6b06e7, -0x012be48a, -0x762cd420, 0x10da7a5a,
116 0x67dd4acc, -0x06462091, -0x71411007, 0x17b7be43, 0x60b08ed5,
117 -0x29295c18, -0x5e2e6c82, 0x38d8c2c4, 0x4fdff252, -0x2e44980f,
118 -0x5943a899, 0x3fb506dd, 0x48b2364b, -0x27f2d426, -0x50f5e4b4,
119 0x36034af6, 0x41047a60, -0x209f103d, -0x579820ab, 0x316e8eef,
120 0x4669be79, -0x349e4c74, -0x43997ce6, 0x256fd2a0, 0x5268e236,
121 -0x33f3886b, -0x44f4b8fd, 0x220216b9, 0x5505262f, -0x3a45c442,
122 -0x4d42f4d8, 0x2bb45a92, 0x5cb36a04, -0x3d280059, -0x4a2f30cf,
123 0x2cd99e8b, 0x5bdeae1d, -0x649b3d50, -0x139c0dda, 0x756aa39c,
124 0x026d930a, -0x63f6f957, -0x14f1c9c1, 0x72076785, 0x05005713,
125 -0x6a40b57e, -0x1d4785ec, 0x7bb12bae, 0x0cb61b38, -0x6d2d7165,
126 -0x1a2a41f3, 0x7cdcefb7, 0x0bdbdf21, -0x792c2d2c, -0x0e2b1dbe,
127 0x68ddb3f8, 0x1fda836e, -0x7e41e933, -0x0946d9a5, 0x6fb077e1,
128 0x18b74777, -0x77f7a51a, -0x00f09590, 0x66063bca, 0x11010b5c,
129 -0x709a6101, -0x079d5197, 0x616bffd3, 0x166ccf45, -0x5ff51d88,
130 -0x28f22d12, 0x4e048354, 0x3903b3c2, -0x5898d99f, -0x2f9fe909,
131 0x4969474d, 0x3e6e77db, -0x512e95b6, -0x2629a524, 0x40df0b66,
132 0x37d83bf0, -0x564351ad, -0x2144613b, 0x47b2cf7f, 0x30b5ffe9,
133 -0x42420de4, -0x35453d76, 0x53b39330, 0x24b4a3a6, -0x452fc9fb,
134 -0x3228f96d, 0x54de5729, 0x23d967bf, -0x4c9985d2, -0x3b9eb548,
135 0x5d681b02, 0x2a6f2b94, -0x4bf441c9, -0x3cf3715f, 0x5a05df1b,
139 function zip_crc32 ($str, $crc = 0)
141 global $zip_crc_table;
143 for ($i = 0; $i < strlen($str); $i++)
144 $crc = ( $zip_crc_table[($crc ^ ord($str[$i])) & 0xff]
145 ^ (($crc >> 8) & 0xffffff) );
149 define('GZIP_MAGIC', "\037\213");
150 define('GZIP_DEFLATE', 010);
152 function zip_deflate ($content)
154 // Compress content, and suck information from gzip header.
155 $z = gzip_compress($content);
157 // Suck OS type byte from gzip header. FIXME: this smells bad.
159 extract(unpack("a2magic/Ccomp_type/Cflags/@9/Cos_type", $z));
161 if ($magic != GZIP_MAGIC)
162 die("Bad gzip magic");
163 if ($comp_type != GZIP_DEFLATE)
164 die("Bad gzip comp type");
165 if (($flags & 0x3e) != 0)
166 die(sprintf("Bad flags (0x%02x)", $flags));
169 $gz_data_len = strlen($z) - $gz_header_len - 8;
170 if ($gz_data_len < 0)
171 die("not enough gzip output?");
173 extract(unpack("Vcrc32", substr($z, $gz_header_len + $gz_data_len)));
175 return array(substr($z, $gz_header_len, $gz_data_len), // gzipped data
181 function zip_inflate ($data, $crc32, $uncomp_size)
183 if (!function_exists('gzopen'))
184 die("Can't inflate data: zlib support not enabled in this PHP");
186 // Reconstruct gzip header and ungzip the data.
187 $mtime = time(); //(Bogus mtime)
189 return gzip_uncompress( pack("a2CxV@10", GZIP_MAGIC, GZIP_DEFLATE, $mtime)
191 . pack("VV", $crc32, $uncomp_size) );
194 function unixtime2dostime ($unix_time) {
196 $unix_time++; // Round up to even seconds.
198 list ($year,$month,$mday,$hour,$min,$sec)
199 = explode(" ", date("Y n j G i s", $unix_time));
202 list ($year,$month,$mday,$hour,$min,$sec) = array(1980, 1, 1, 0, 0, 0);
204 $dosdate = (($year - 1980) << 9) | ($month << 5) | $mday;
205 $dostime = ($hour << 11) | ($min << 5) | ($sec >> 1);
207 return array($dosdate, $dostime);
210 function dostime2unixtime ($dosdate, $dostime) {
211 $mday = $dosdate & 0x1f;
212 $month = ($dosdate >> 5) & 0x0f;
213 $year = 1980 + (($dosdate >> 9) & 0x7f);
215 $sec = ($dostime & 0x1f) * 2;
216 $min = ($dostime >> 5) & 0x3f;
217 $hour = ($dostime >> 11) & 0x1f;
219 return mktime($hour, $min, $sec, $month, $mday, $year);
224 * Class for zipfile creation.
226 define('ZIP_DEFLATE', GZIP_DEFLATE);
227 define('ZIP_STORE', 0);
228 define('ZIP_CENTHEAD_MAGIC', "PK\001\002");
229 define('ZIP_LOCHEAD_MAGIC', "PK\003\004");
230 define('ZIP_ENDDIR_MAGIC', "PK\005\006");
234 function ZipWriter ($comment = "", $zipname = "archive.zip") {
235 $this->comment = $comment;
237 $this->dir = ""; // "Central directory block"
238 $this->offset = 0; // Current file position.
240 $zipname = addslashes($zipname);
241 header("Content-Type: application/zip; name=\"$zipname\"");
242 header("Content-Disposition: save; filename=\"$zipname\"");
245 function addRegularFile ($filename, $content, $attrib = false) {
249 $size = strlen($content);
250 if (function_exists('gzopen'))
252 list ($data, $crc32, $os_type) = zip_deflate($content);
253 if (strlen($data) < $size)
255 $content = $data; // Use compressed data.
256 $comp_type = ZIP_DEFLATE;
259 unset($crc32); // force plain store.
263 $comp_type = ZIP_STORE;
264 $crc32 = zip_crc32($content);
267 if ($attrib['write_protected'])
268 $atx = (0100444 << 16) | 1; // S_IFREG + read permissions to everybody.
270 $atx = (0100644 << 16); // Add owner write perms.
272 $ati = $attrib['is_ascii'] ? 1 : 0;
274 if (!$attrib['mtime'])
275 $attrib['mtime'] = time();
276 list ($mod_date, $mod_time) = unixtime2dostime($attrib['mtime']);
278 // Construct parts common to "Local file header" and "Central
279 // directory file header."
281 $head = pack("vvvvvVVVvv",
282 20, // Version needed to extract (FIXME: is this right?)
283 0, // Gen purp bit flag
291 strlen($attrib['extra_field']));
293 // Construct the "Local file header"
294 $lheader = ZIP_LOCHEAD_MAGIC . $head . $filename . $attrib['extra_field'];
296 // Construct the "central directory file header"
297 $this->dir .= pack("a4CC",
299 23, // Version made by (FIXME: is this right?)
302 $this->dir .= pack("vvvVV",
303 strlen($attrib['file_comment']),
304 0, // Disk number start
305 $ati, // Internal file attributes
306 $atx, // External file attributes
307 $this->offset); // Relative offset of local header
308 $this->dir .= $filename . $attrib['extra_field'] . $attrib['file_comment'];
310 // Output the "Local file header" and file contents.
314 $this->offset += strlen($lheader) + strlen($content);
319 // Output the central directory
322 // Construct the "End of central directory record"
323 echo ZIP_ENDDIR_MAGIC;
325 0, // Number of this disk.
326 0, // Number of disk with start of c dir
327 $this->nfiles, // Number entries on this disk
328 $this->nfiles, // Number entries
329 strlen($this->dir), // Size of central directory
330 $this->offset, // Offset of central directory
331 strlen($this->comment));
338 * Class for reading zip files.
342 * Many of the die()'s should probably be warn()'s (eg. CRC mismatch).
344 * Only a subset of zip formats is recognized. (I think that unsupported
345 * formats will be recognized as such rather than silently munged.)
347 * We don't read the central directory. This means we don't see the
348 * file attributes (text? read-only?), or file comments.
350 * Right now we ignore the file mod date and time, since we don't need it.
354 function ZipReader ($zipfile) {
355 if (!($this->fp = fopen($zipfile, "rb")))
356 die("Can't open zip file '$zipfile' for reading");
359 function _read ($nbytes) {
360 $chunk = fread($this->fp, $nbytes);
361 if (strlen($chunk) != $nbytes)
362 die("Unexpected EOF in zip file");
371 function readFile () {
372 $head = $this->_read(30);
374 extract(unpack("a4magic/vreq_version/vflags/vcomp_type"
375 . "/vmod_time/vmod_date"
376 . "/Vcrc32/Vcomp_size/Vuncomp_size"
377 . "/vfilename_len/vextrafld_len",
380 //FIXME: we should probably check $req_version.
381 $attrib['mtime'] = dostime2unixtime($mod_date, $mod_time);
383 if ($magic != ZIP_LOCHEAD_MAGIC)
385 if ($magic != ZIP_CENTHEAD_MAGIC)
386 die("Bad header type: " . htmlspecialchars($magic)); // FIXME: better message?
387 return $this->done();
389 if (($flags & 0x21) != 0)
390 die("Encryption and/or zip patches not supported.");
391 if (($flags & 0x08) != 0)
392 die("Postponed CRC not yet supported."); // FIXME: ???
394 $filename = $this->_read($filename_len);
395 if ($extrafld_len != 0)
396 $attrib['extra_field'] = $this->_read($extrafld_len);
398 $data = $this->_read($comp_size);
400 if ($comp_type == ZIP_DEFLATE)
402 $data = zip_inflate($data, $crc32, $uncomp_size);
404 else if ($comp_type == ZIP_STORE)
406 $crc = zip_crc32($data);
408 die(sprintf("CRC mismatch %x != %x", $crc, $crc32));
411 die("Compression method $comp_method unsupported");
413 if (strlen($data) != $uncomp_size)
414 die(sprintf("Uncompressed size mismatch %d != %d",
415 strlen($data), $uncomp_size));
417 return array($filename, $data, $attrib);
422 * Routines for Mime mailification of pages.
424 //FIXME: these should go elsewhere (stdlib.php).
425 function ctime ($unix_time)
427 return date("D M j H:i:s Y", $unix_time);
430 function rfc1123date ($unix_time)
434 $zonesecs = date("Z", $unix_time);
438 $zonemins = (int)((abs($zonesecs) + 30) / 60);
439 $zonehrs = (int)(($zonemins + 30) / 60);
440 $zonemins -= $zonehrs * 60;
441 $zone .= sprintf("%02d%02d", $zonehrs, $zonemins);
443 return date("D, j M Y H:i:s", $unix_time) . $zone;
447 * Routines for quoted-printable en/decoding.
449 function QuotedPrintableEncode ($string)
451 // Quote special characters in line.
455 // The complicated regexp is to force quoting of trailing spaces.
456 preg_match('/^([ !-<>-~]*)(?:([!-<>-~]$)|(.))/s', $string, $match);
457 $quoted .= $match[1] . $match[2];
459 $quoted .= sprintf("=%02X", ord($match[3]));
460 $string = substr($string, strlen($match[0]));
463 // This splits the line (preferably after white-space) into lines
464 // which are no longer than 76 chars (after adding trailing '=' for
465 // soft line break, but before adding \r\n.)
466 return preg_replace('/(?=.{77})(.{10,74}[ \t]|.{71,73}[^=][^=])/s',
467 "\\1=\r\n", $quoted);
470 function QuotedPrintableDecode ($string)
472 // Eliminate soft line-breaks.
473 $string = preg_replace('/=[ \t\r]*\n/', '', $string);
474 return quoted_printable_decode($string);
477 define('MIME_TOKEN_REGEXP', "[-!#-'*+.0-9A-Z^-~]+");
479 function MimeContentTypeHeader ($type, $subtype, $params)
481 $header = "Content-Type: $type/$subtype";
483 while (list($key, $val) = each($params))
485 //FIXME: what about non-ascii printables in $val?
486 if (!preg_match('/^' . MIME_TOKEN_REGEXP . '$/', $val))
487 $val = '"' . addslashes($val) . '"';
488 $header .= ";\r\n $key=$val";
490 return "$header\r\n";
493 function MimeMultipart ($parts)
495 global $mime_multipart_count;
497 // The string "=_" can not occur in quoted-printable encoded data.
498 $boundary = "=_multipart_boundary_" . ++$mime_multipart_count;
500 $head = MimeContentTypeHeader('multipart', 'mixed',
501 array('boundary' => $boundary));
503 $sep = "\r\n--$boundary\r\n";
505 return $head . $sep . implode($sep, $parts) . "\r\n--${boundary}--\r\n";
508 function MimeifyPage ($pagehash) {
510 // FIXME: add 'hits' to $params
511 $params = array('pagename' => rawurlencode($pagename),
512 'author' => rawurlencode($author),
513 'version' => $version,
515 'lastmodified' => $lastmodified,
516 'created' => $created);
518 if (($flags & FLAG_PAGE_LOCKED) != 0)
519 $params['flags'] = 'PAGE_LOCKED';
520 for ($i = 1; $i <= NUM_LINKS; $i++)
521 if ($ref = $refs[$i])
522 $params["ref$i"] = rawurlencode($ref);
524 $out = MimeContentTypeHeader('application', 'x-phpwiki', $params);
525 $out .= "Content-Transfer-Encoding: quoted-printable\r\n";
529 while (list($junk, $line) = each($content))
530 $out .= QuotedPrintableEncode(chop($line)) . "\r\n";
534 function MimeifyPages ($pagehashes)
536 $npages = sizeof($pagehashes);
537 for ($i = 0; $i < $npages; $i++)
538 $parts[$i] = MimeifyPage($pagehashes[$i]);
539 return $npages == 1 ? $parts[0] : MimeMultipart($parts);
544 * Routines for parsing Mime-ified phpwiki pages.
546 function ParseRFC822Headers (&$string)
548 if (preg_match("/^From (.*)\r?\n/", $string, $match))
550 $headers['from '] = preg_replace('/^\s+|\s+$/', '', $match[1]);
551 $string = substr($string, strlen($match[0]));
554 while (preg_match('/^([!-9;-~]+) [ \t]* : [ \t]* '
555 . '( .* \r?\n (?: [ \t] .* \r?\n)* )/x',
558 $headers[strtolower($match[1])]
559 = preg_replace('/^\s+|\s+$/', '', $match[2]);
560 $string = substr($string, strlen($match[0]));
566 if (! preg_match("/^\r?\n/", $string, $match))
567 die("No blank line after headers:\n '"
568 . htmlspecialchars($string) . "'");
569 $string = substr($string, strlen($match[0]));
575 function ParseMimeContentType ($string)
577 // FIXME: Remove (RFC822 style comments).
580 if (!preg_match(':^\s*(' . MIME_TOKEN_REGEXP . ')\s*'
582 . '\s*(' . MIME_TOKEN_REGEXP . ')\s*:x',
584 die ("Bad MIME content-type");
586 $type = strtolower($match[1]);
587 $subtype = strtolower($match[2]);
588 $string = substr($string, strlen($match[0]));
592 while (preg_match('/^;\s*(' . MIME_TOKEN_REGEXP . ')\s*=\s*'
593 . '(?:(' . MIME_TOKEN_REGEXP . ')|"((?:[^"\\\\]|\\.)*)") \s*/sx',
596 if (strlen($match[2]))
599 $val = preg_replace('/[\\\\](.)/s', '\\1', $match[3]);
601 $param[strtolower($match[1])] = $val;
603 $string = substr($string, strlen($match[0]));
606 return array($type, $subtype, $param);
609 function ParseMimeMultipart($data, $boundary)
614 $boundary = preg_quote($boundary);
616 while (preg_match("/^(|.*?\n)--$boundary((?:--)?)[^\n]*\n/s",
619 $data = substr($data, strlen($match[0]));
620 if ( ! isset($parts) )
621 $parts = array(); // First time through: discard leading chaff
624 if ($content = ParseMimeifiedPages($match[1]))
625 for (reset($content); $p = current($content); next($content))
630 return $parts; // End boundary found.
632 die("No end boundary?");
635 function ParseMimeifiedPages ($data)
637 if (!($headers = ParseRFC822Headers($data))
638 || !($typeheader = $headers['content-type']))
640 //warn("Can't find content-type header");
644 if (!(list ($type, $subtype, $params) = ParseMimeContentType($typeheader)))
646 warn("Can't parse content-type: ("
647 . htmlspecialchars($typeheader) . ")");
650 if ("$type/$subtype" == 'multipart/mixed')
651 return ParseMimeMultipart($data, $params['boundary']);
652 else if ("$type/$subtype" != 'application/x-phpwiki')
654 warn("Bad content-type: $type/$subtype");
658 // FIXME: more sanity checking?
659 $pagehash = array('pagename' => rawurldecode($params['pagename']),
660 'author' => rawurldecode($params['author']),
661 'version' => $params['version'],
662 'lastmodified' => $params['lastmodified'],
663 'created' => $params['created']);
664 $pagehash['flags'] = 0;
665 if (preg_match('/PAGE_LOCKED/', $params['flags']))
666 $pagehash['flags'] |= FLAG_PAGE_LOCKED;
667 for ($i = 1; $i <= NUM_LINKS; $i++)
668 if ($ref = $params["ref$i"])
669 $pagehash['refs'][$i] = rawurldecode($ref);
671 $encoding = strtolower($headers['content-transfer-encoding']);
672 if ($encoding == 'quoted-printable')
673 $data = QuotedPrintableDecode($data);
674 else if ($encoding && $encoding == 'binary')
675 die("Unknown encoding type: $encoding");
677 $pagehash['content'] = preg_split('/[ \t\r]*\n/', chop($data));
679 return array($pagehash);