<?php
rcs_id('$Id$');
//FIXME: get rid of this.
function warn ($msg)
{
echo "<br><b>Warning:</b> " . htmlspecialchars($msg) . "<br>\n";
}
/**
* GZIP stuff.
*
* Note that we use gzopen()/gzwrite() instead of gzcompress() even
* if gzcompress() is available. Gzcompress() puts out data with different
* headers --- in particular it includes an "adler-32" checksum rather than
* a "CRC32" checksum. Since we need the CRC-32 checksum, and since not
* all PHP's have gzcompress(), we'll just stick with gzopen().
*/
function gzip_cleanup () {
global $gzip_tmpfile;
if ($gzip_tmpfile)
@unlink($gzip_tmpfile);
}
function gzip_tempnam () {
global $gzip_tmpfile;
if (!$gzip_tmpfile)
{
//FIXME: does this work on non-unix machines?
$gzip_tmpfile = tempnam("/tmp", "wkzip");
register_shutdown_function("gzip_cleanup");
}
return $gzip_tmpfile;
}
function gzip_compress ($data) {
$filename = gzip_tempnam();
if (!($fp = gzopen($filename, "wb")))
die("gzopen failed");
gzwrite($fp, $data, strlen($data));
if (!gzclose($fp))
die("gzclose failed");
$size = filesize($filename);
if (!($fp = fopen($filename, "rb")))
die("fopen failed");
if (!($z = fread($fp, $size)) || strlen($z) != $size)
die("fread failed");
if (!fclose($fp))
die("fclose failed");
unlink($filename);
return $z;
}
function gzip_uncompress ($data) {
$filename = gzip_tempnam();
if (!($fp = fopen($filename, "wb")))
die("fopen failed");
fwrite($fp, $data, strlen($data));
if (!fclose($fp))
die("fclose failed");
if (!($fp = gzopen($filename, "rb")))
die("gzopen failed");
$unz = '';
while ($buf = gzread($fp, 4096))
$unz .= $buf;
if (!gzclose($fp))
die("gzclose failed");
unlink($filename);
return $unz;
}
/**
* CRC32 computation. Hacked from Info-zip's zip-2.3 source code.
*/
/* NOTE: The range of PHP ints seems to be -0x80000000 to 0x7fffffff.
* So, had to munge these constants.
*/
$zip_crc_table = array (
0x00000000, 0x77073096, -0x11f19ed4, -0x66f6ae46, 0x076dc419,
0x706af48f, -0x169c5acb, -0x619b6a5d, 0x0edb8832, 0x79dcb8a4,
-0x1f2a16e2, -0x682d2678, 0x09b64c2b, 0x7eb17cbd, -0x1847d2f9,
-0x6f40e26f, 0x1db71064, 0x6ab020f2, -0x0c468eb8, -0x7b41be22,
0x1adad47d, 0x6ddde4eb, -0x0b2b4aaf, -0x7c2c7a39, 0x136c9856,
0x646ba8c0, -0x029d0686, -0x759a3614, 0x14015c4f, 0x63066cd9,
-0x05f0c29d, -0x72f7f20b, 0x3b6e20c8, 0x4c69105e, -0x2a9fbe1c,
-0x5d988e8e, 0x3c03e4d1, 0x4b04d447, -0x2df27a03, -0x5af54a95,
0x35b5a8fa, 0x42b2986c, -0x2444362a, -0x534306c0, 0x32d86ce3,
0x45df5c75, -0x2329f231, -0x542ec2a7, 0x26d930ac, 0x51de003a,
-0x3728ae80, -0x402f9eea, 0x21b4f4b5, 0x56b3c423, -0x30456a67,
-0x47425af1, 0x2802b89e, 0x5f058808, -0x39f3264e, -0x4ef416dc,
0x2f6f7c87, 0x58684c11, -0x3e9ee255, -0x4999d2c3, 0x76dc4190,
0x01db7106, -0x672ddf44, -0x102aefd6, 0x71b18589, 0x06b6b51f,
-0x60401b5b, -0x17472bcd, 0x7807c9a2, 0x0f00f934, -0x69f65772,
-0x1ef167e8, 0x7f6a0dbb, 0x086d3d2d, -0x6e9b9369, -0x199ca3ff,
0x6b6b51f4, 0x1c6c6162, -0x7a9acf28, -0x0d9dffb2, 0x6c0695ed,
0x1b01a57b, -0x7df70b3f, -0x0af03ba9, 0x65b0d9c6, 0x12b7e950,
-0x74414716, -0x03467784, 0x62dd1ddf, 0x15da2d49, -0x732c830d,
-0x042bb39b, 0x4db26158, 0x3ab551ce, -0x5c43ff8c, -0x2b44cf1e,
0x4adfa541, 0x3dd895d7, -0x5b2e3b93, -0x2c290b05, 0x4369e96a,
0x346ed9fc, -0x529877ba, -0x259f4730, 0x44042d73, 0x33031de5,
-0x55f5b3a1, -0x22f28337, 0x5005713c, 0x270241aa, -0x41f4eff0,
-0x36f3df7a, 0x5768b525, 0x206f85b3, -0x46992bf7, -0x319e1b61,
0x5edef90e, 0x29d9c998, -0x4f2f67de, -0x3828574c, 0x59b33d17,
0x2eb40d81, -0x4842a3c5, -0x3f459353, -0x12477ce0, -0x65404c4a,
0x03b6e20c, 0x74b1d29a, -0x152ab8c7, -0x622d8851, 0x04db2615,
0x73dc1683, -0x1c9cf4ee, -0x6b9bc47c, 0x0d6d6a3e, 0x7a6a5aa8,
-0x1bf130f5, -0x6cf60063, 0x0a00ae27, 0x7d079eb1, -0x0ff06cbc,
-0x78f75c2e, 0x1e01f268, 0x6906c2fe, -0x089da8a3, -0x7f9a9835,
0x196c3671, 0x6e6b06e7, -0x012be48a, -0x762cd420, 0x10da7a5a,
0x67dd4acc, -0x06462091, -0x71411007, 0x17b7be43, 0x60b08ed5,
-0x29295c18, -0x5e2e6c82, 0x38d8c2c4, 0x4fdff252, -0x2e44980f,
-0x5943a899, 0x3fb506dd, 0x48b2364b, -0x27f2d426, -0x50f5e4b4,
0x36034af6, 0x41047a60, -0x209f103d, -0x579820ab, 0x316e8eef,
0x4669be79, -0x349e4c74, -0x43997ce6, 0x256fd2a0, 0x5268e236,
-0x33f3886b, -0x44f4b8fd, 0x220216b9, 0x5505262f, -0x3a45c442,
-0x4d42f4d8, 0x2bb45a92, 0x5cb36a04, -0x3d280059, -0x4a2f30cf,
0x2cd99e8b, 0x5bdeae1d, -0x649b3d50, -0x139c0dda, 0x756aa39c,
0x026d930a, -0x63f6f957, -0x14f1c9c1, 0x72076785, 0x05005713,
-0x6a40b57e, -0x1d4785ec, 0x7bb12bae, 0x0cb61b38, -0x6d2d7165,
-0x1a2a41f3, 0x7cdcefb7, 0x0bdbdf21, -0x792c2d2c, -0x0e2b1dbe,
0x68ddb3f8, 0x1fda836e, -0x7e41e933, -0x0946d9a5, 0x6fb077e1,
0x18b74777, -0x77f7a51a, -0x00f09590, 0x66063bca, 0x11010b5c,
-0x709a6101, -0x079d5197, 0x616bffd3, 0x166ccf45, -0x5ff51d88,
-0x28f22d12, 0x4e048354, 0x3903b3c2, -0x5898d99f, -0x2f9fe909,
0x4969474d, 0x3e6e77db, -0x512e95b6, -0x2629a524, 0x40df0b66,
0x37d83bf0, -0x564351ad, -0x2144613b, 0x47b2cf7f, 0x30b5ffe9,
-0x42420de4, -0x35453d76, 0x53b39330, 0x24b4a3a6, -0x452fc9fb,
-0x3228f96d, 0x54de5729, 0x23d967bf, -0x4c9985d2, -0x3b9eb548,
0x5d681b02, 0x2a6f2b94, -0x4bf441c9, -0x3cf3715f, 0x5a05df1b,
0x2d02ef8d
);
function zip_crc32 ($str, $crc = 0)
{
global $zip_crc_table;
$crc = ~$crc;
for ($i = 0; $i < strlen($str); $i++)
$crc = ( $zip_crc_table[($crc ^ ord($str[$i])) & 0xff]
^ (($crc >> 8) & 0xffffff) );
return ~$crc;
}
define('GZIP_MAGIC', "\037\213");
define('GZIP_DEFLATE', 010);
function zip_deflate ($content)
{
// Compress content, and suck information from gzip header.
$z = gzip_compress($content);
// Suck OS type byte from gzip header. FIXME: this smells bad.
extract(unpack("a2magic/Ccomp_type/Cflags/@9/Cos_type", $z));
if ($magic != GZIP_MAGIC)
die("Bad gzip magic");
if ($comp_type != GZIP_DEFLATE)
die("Bad gzip comp type");
if (($flags & 0x3e) != 0)
die(sprintf("Bad flags (0x%02x)", $flags));
$gz_header_len = 10;
$gz_data_len = strlen($z) - $gz_header_len - 8;
if ($gz_data_len < 0)
die("not enough gzip output?");
extract(unpack("Vcrc32", substr($z, $gz_header_len + $gz_data_len)));
return array(substr($z, $gz_header_len, $gz_data_len), // gzipped data
$crc32, // crc
$os_type // OS type
);
}
function zip_inflate ($data, $crc32, $uncomp_size)
{
if (!function_exists('gzopen'))
die("Can't inflate data: zlib support not enabled in this PHP");
// Reconstruct gzip header and ungzip the data.
$mtime = time(); //(Bogus mtime)
return gzip_uncompress( pack("a2CxV@10", GZIP_MAGIC, GZIP_DEFLATE, $mtime)
. $data
. pack("VV", $crc32, $uncomp_size) );
}
function unixtime2dostime ($unix_time) {
if ($unix_time % 1)
$unix_time++; // Round up to even seconds.
list ($year,$month,$mday,$hour,$min,$sec)
= explode(" ", date("Y n j G i s", $unix_time));
if ($year < 1980)
list ($year,$month,$mday,$hour,$min,$sec) = array(1980, 1, 1, 0, 0, 0);
$dosdate = (($year - 1980) << 9) | ($month << 5) | $mday;
$dostime = ($hour << 11) | ($min << 5) | ($sec >> 1);
return array($dosdate, $dostime);
}
function dostime2unixtime ($dosdate, $dostime) {
$mday = $dosdate & 0x1f;
$month = ($dosdate >> 5) & 0x0f;
$year = 1980 + (($dosdate >> 9) & 0x7f);
$sec = ($dostime & 0x1f) * 2;
$min = ($dostime >> 5) & 0x3f;
$hour = ($dostime >> 11) & 0x1f;
return mktime($hour, $min, $sec, $month, $mday, $year);
}
/**
* Class for zipfile creation.
*/
define('ZIP_DEFLATE', GZIP_DEFLATE);
define('ZIP_STORE', 0);
define('ZIP_CENTHEAD_MAGIC', "PK\001\002");
define('ZIP_LOCHEAD_MAGIC', "PK\003\004");
define('ZIP_ENDDIR_MAGIC', "PK\005\006");
class ZipWriter
{
function ZipWriter ($comment = "", $zipname = "archive.zip") {
$this->comment = $comment;
$this->nfiles = 0;
$this->dir = ""; // "Central directory block"
$this->offset = 0; // Current file position.
$zipname = addslashes($zipname);
header("Content-Type: application/zip; name=\"$zipname\"");
header("Content-Disposition: save; filename=\"$zipname\"");
}
function addRegularFile ($filename, $content, $attrib = false) {
if (!$attrib)
$attrib = array();
$size = strlen($content);
if (function_exists('gzopen'))
{
list ($data, $crc32, $os_type) = zip_deflate($content);
if (strlen($data) < $size)
{
$content = $data; // Use compressed data.
$comp_type = ZIP_DEFLATE;
}
else
unset($crc32); // force plain store.
}
if (!isset($crc32))
{
$comp_type = ZIP_STORE;
$crc32 = zip_crc32($content);
}
if (!empty($attrib['write_protected']))
$atx = (0100444 << 16) | 1; // S_IFREG + read permissions to everybody.
else
$atx = (0100644 << 16); // Add owner write perms.
$ati = $attrib['is_ascii'] ? 1 : 0;
if (empty($attrib['mtime']))
$attrib['mtime'] = time();
list ($mod_date, $mod_time) = unixtime2dostime($attrib['mtime']);
// Construct parts common to "Local file header" and "Central
// directory file header."
if (!isset($attrib['extra_field']))
$attrib['extra_field'] = '';
if (!isset($attrib['file_comment']))
$attrib['file_comment'] = '';
$head = pack("vvvvvVVVvv",
20, // Version needed to extract (FIXME: is this right?)
0, // Gen purp bit flag
$comp_type,
$mod_time,
$mod_date,
$crc32,
strlen($content),
$size,
strlen($filename),
strlen($attrib['extra_field']));
// Construct the "Local file header"
$lheader = ZIP_LOCHEAD_MAGIC . $head . $filename . $attrib['extra_field'];
// Construct the "central directory file header"
$this->dir .= pack("a4CC",
ZIP_CENTHEAD_MAGIC,
23, // Version made by (FIXME: is this right?)
$os_type);
$this->dir .= $head;
$this->dir .= pack("vvvVV",
strlen($attrib['file_comment']),
0, // Disk number start
$ati, // Internal file attributes
$atx, // External file attributes
$this->offset); // Relative offset of local header
$this->dir .= $filename . $attrib['extra_field'] . $attrib['file_comment'];
// Output the "Local file header" and file contents.
echo $lheader;
echo $content;
$this->offset += strlen($lheader) + strlen($content);
$this->nfiles++;
}
function finish () {
// Output the central directory
echo $this->dir;
// Construct the "End of central directory record"
echo ZIP_ENDDIR_MAGIC;
echo pack("vvvvVVv",
0, // Number of this disk.
0, // Number of disk with start of c dir
$this->nfiles, // Number entries on this disk
$this->nfiles, // Number entries
strlen($this->dir), // Size of central directory
$this->offset, // Offset of central directory
strlen($this->comment));
echo $this->comment;
}
}
/**
* Class for reading zip files.
*
* BUGS:
*
* Many of the die()'s should probably be warn()'s (eg. CRC mismatch).
*
* Only a subset of zip formats is recognized. (I think that unsupported
* formats will be recognized as such rather than silently munged.)
*
* We don't read the central directory. This means we don't see the
* file attributes (text? read-only?), or file comments.
*
* Right now we ignore the file mod date and time, since we don't need it.
*/
class ZipReader
{
function ZipReader ($zipfile) {
if (!($this->fp = fopen($zipfile, "rb")))
die("Can't open zip file '$zipfile' for reading");
}
function _read ($nbytes) {
$chunk = fread($this->fp, $nbytes);
if (strlen($chunk) != $nbytes)
die("Unexpected EOF in zip file");
return $chunk;
}
function done () {
fclose($this->fp);
return false;
}
function readFile () {
$head = $this->_read(30);
extract(unpack("a4magic/vreq_version/vflags/vcomp_type"
. "/vmod_time/vmod_date"
. "/Vcrc32/Vcomp_size/Vuncomp_size"
. "/vfilename_len/vextrafld_len",
$head));
//FIXME: we should probably check $req_version.
$attrib['mtime'] = dostime2unixtime($mod_date, $mod_time);
if ($magic != ZIP_LOCHEAD_MAGIC)
{
if ($magic != ZIP_CENTHEAD_MAGIC)
die("Bad header type: " . htmlspecialchars($magic)); // FIXME: better message?
return $this->done();
}
if (($flags & 0x21) != 0)
die("Encryption and/or zip patches not supported.");
if (($flags & 0x08) != 0)
die("Postponed CRC not yet supported."); // FIXME: ???
$filename = $this->_read($filename_len);
if ($extrafld_len != 0)
$attrib['extra_field'] = $this->_read($extrafld_len);
$data = $this->_read($comp_size);
if ($comp_type == ZIP_DEFLATE)
{
$data = zip_inflate($data, $crc32, $uncomp_size);
}
else if ($comp_type == ZIP_STORE)
{
$crc = zip_crc32($data);
if ($crc32 != $crc)
die(sprintf("CRC mismatch %x != %x", $crc, $crc32));
}
else
die("Compression method $comp_method unsupported");
if (strlen($data) != $uncomp_size)
die(sprintf("Uncompressed size mismatch %d != %d",
strlen($data), $uncomp_size));
return array($filename, $data, $attrib);
}
}
/**
* Routines for Mime mailification of pages.
*/
//FIXME: these should go elsewhere (stdlib.php).
function ctime ($unix_time)
{
return date("D M j H:i:s Y", $unix_time);
}
function rfc1123date ($unix_time)
{
$zone = ' +';
$zonesecs = date("Z", $unix_time);
if ($zonesecs < 0)
$zone = ' -';
$zonemins = (int)((abs($zonesecs) + 30) / 60);
$zonehrs = (int)(($zonemins + 30) / 60);
$zonemins -= $zonehrs * 60;
$zone .= sprintf("%02d%02d", $zonehrs, $zonemins);
return date("D, j M Y H:i:s", $unix_time) . $zone;
}
/**
* Routines for quoted-printable en/decoding.
*/
function QuotedPrintableEncode ($string)
{
// Quote special characters in line.
$quoted = "";
while ($string)
{
// The complicated regexp is to force quoting of trailing spaces.
preg_match('/^([ !-<>-~]*)(?:([!-<>-~]$)|(.))/s', $string, $match);
$quoted .= $match[1] . $match[2];
if (!empty($match[3]))
$quoted .= sprintf("=%02X", ord($match[3]));
$string = substr($string, strlen($match[0]));
}
// Split line.
// This splits the line (preferably after white-space) into lines
// which are no longer than 76 chars (after adding trailing '=' for
// soft line break, but before adding \r\n.)
return preg_replace('/(?=.{77})(.{10,74}[ \t]|.{71,73}[^=][^=])/s',
"\\1=\r\n", $quoted);
}
function QuotedPrintableDecode ($string)
{
// Eliminate soft line-breaks.
$string = preg_replace('/=[ \t\r]*\n/', '', $string);
return quoted_printable_decode($string);
}
define('MIME_TOKEN_REGEXP', "[-!#-'*+.0-9A-Z^-~]+");
function MimeContentTypeHeader ($type, $subtype, $params)
{
$header = "Content-Type: $type/$subtype";
reset($params);
while (list($key, $val) = each($params))
{
//FIXME: what about non-ascii printables in $val?
if (!preg_match('/^' . MIME_TOKEN_REGEXP . '$/', $val))
$val = '"' . addslashes($val) . '"';
$header .= ";\r\n $key=$val";
}
return "$header\r\n";
}
function MimeMultipart ($parts)
{
global $mime_multipart_count;
// The string "=_" can not occur in quoted-printable encoded data.
$boundary = "=_multipart_boundary_" . ++$mime_multipart_count;
$head = MimeContentTypeHeader('multipart', 'mixed',
array('boundary' => $boundary));
$sep = "\r\n--$boundary\r\n";
return $head . $sep . implode($sep, $parts) . "\r\n--${boundary}--\r\n";
}
function MimeifyPage ($pagehash) {
extract($pagehash);
// FIXME: add 'hits' to $params
$params = array('pagename' => rawurlencode($pagename),
'author' => rawurlencode($author),
'version' => $version,
'flags' =>"",
'lastmodified' => $lastmodified,
'created' => $created);
if (($flags & FLAG_PAGE_LOCKED) != 0)
$params['flags'] = 'PAGE_LOCKED';
for ($i = 1; $i <= NUM_LINKS; $i++)
if ($ref = $refs[$i])
$params["ref$i"] = rawurlencode($ref);
$out = MimeContentTypeHeader('application', 'x-phpwiki', $params);
$out .= "Content-Transfer-Encoding: quoted-printable\r\n";
$out .= "\r\n";
reset($content);
while (list($junk, $line) = each($content))
$out .= QuotedPrintableEncode(chop($line)) . "\r\n";
return $out;
}
function MimeifyPages ($pagehashes)
{
$npages = sizeof($pagehashes);
for ($i = 0; $i < $npages; $i++)
$parts[$i] = MimeifyPage($pagehashes[$i]);
return $npages == 1 ? $parts[0] : MimeMultipart($parts);
}
/**
* Routines for parsing Mime-ified phpwiki pages.
*/
function ParseRFC822Headers (&$string)
{
if (preg_match("/^From (.*)\r?\n/", $string, $match))
{
$headers['from '] = preg_replace('/^\s+|\s+$/', '', $match[1]);
$string = substr($string, strlen($match[0]));
}
while (preg_match('/^([!-9;-~]+) [ \t]* : [ \t]* '
. '( .* \r?\n (?: [ \t] .* \r?\n)* )/x',
$string, $match))
{
$headers[strtolower($match[1])]
= preg_replace('/^\s+|\s+$/', '', $match[2]);
$string = substr($string, strlen($match[0]));
}
if (empty($headers))
return false;
if (! preg_match("/^\r?\n/", $string, $match))
die("No blank line after headers:\n '"
. htmlspecialchars($string) . "'");
$string = substr($string, strlen($match[0]));
return $headers;
}
function ParseMimeContentType ($string)
{
// FIXME: Remove (RFC822 style comments).
// Get type/subtype
if (!preg_match(':^\s*(' . MIME_TOKEN_REGEXP . ')\s*'
. '/'
. '\s*(' . MIME_TOKEN_REGEXP . ')\s*:x',
$string, $match))
die ("Bad MIME content-type");
$type = strtolower($match[1]);
$subtype = strtolower($match[2]);
$string = substr($string, strlen($match[0]));
$param = array();
while (preg_match('/^;\s*(' . MIME_TOKEN_REGEXP . ')\s*=\s*'
. '(?:(' . MIME_TOKEN_REGEXP . ')|"((?:[^"\\\\]|\\.)*)") \s*/sx',
$string, $match))
{
if (strlen($match[2]))
$val = $match[2];
else
$val = preg_replace('/[\\\\](.)/s', '\\1', $match[3]);
$param[strtolower($match[1])] = $val;
$string = substr($string, strlen($match[0]));
}
return array($type, $subtype, $param);
}
function ParseMimeMultipart($data, $boundary)
{
if (!$boundary)
die("No boundary?");
$boundary = preg_quote($boundary);
while (preg_match("=^(|.*?\n)--$boundary((?:--)?)[^\n]*\n=s",
$data, $match))
{
$data = substr($data, strlen($match[0]));
if ( ! isset($parts) )
$parts = array(); // First time through: discard leading chaff
else
{
if ($content = ParseMimeifiedPages($match[1]))
for (reset($content); $p = current($content); next($content))
$parts[] = $p;
}
if ($match[2])
return $parts; // End boundary found.
}
die("No end boundary?");
}
function ParseMimeifiedPages ($data)
{
if (!($headers = ParseRFC822Headers($data))
|| !($typeheader = $headers['content-type']))
{
//warn("Can't find content-type header");
return false;
}
if (!(list ($type, $subtype, $params) = ParseMimeContentType($typeheader)))
{
warn("Can't parse content-type: ("
. htmlspecialchars($typeheader) . ")");
return false;
}
if ("$type/$subtype" == 'multipart/mixed')
return ParseMimeMultipart($data, $params['boundary']);
else if ("$type/$subtype" != 'application/x-phpwiki')
{
warn("Bad content-type: $type/$subtype");
return false;
}
// FIXME: more sanity checking?
$pagehash = array('pagename' => rawurldecode($params['pagename']),
'author' => rawurldecode($params['author']),
'version' => $params['version'],
'lastmodified' => $params['lastmodified'],
'created' => $params['created']);
$pagehash['flags'] = 0;
if (preg_match('/PAGE_LOCKED/', $params['flags']))
$pagehash['flags'] |= FLAG_PAGE_LOCKED;
for ($i = 1; $i <= NUM_LINKS; $i++)
if ($ref = $params["ref$i"])
$pagehash['refs'][$i] = rawurldecode($ref);
$encoding = strtolower($headers['content-transfer-encoding']);
if ($encoding == 'quoted-printable')
$data = QuotedPrintableDecode($data);
else if ($encoding && $encoding != 'binary')
die("Unknown encoding type: $encoding");
$pagehash['content'] = preg_split('/[ \t\r]*\n/', chop($data));
return array($pagehash);
}
?>
