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authorpabs <pabs@pablotron.org>2007-08-22 21:26:39 -0400
committerpabs <pabs@pablotron.org>2007-08-22 21:26:39 -0400
commitf11b211f154ec56dc860a2b3bfadb17f2a3325dc (patch)
tree3fa7c90051fb4a24eb9af11f6b8cbc42c7bd4e19
downloadzipstream-php-f11b211f154ec56dc860a2b3bfadb17f2a3325dc.tar.bz2
zipstream-php-f11b211f154ec56dc860a2b3bfadb17f2a3325dc.zip
Initial commit.
-rw-r--r--extras/README3
-rw-r--r--extras/zipfile.class.php190
-rw-r--r--zipstream.php181
3 files changed, 374 insertions, 0 deletions
diff --git a/extras/README b/extras/README
new file mode 100644
index 0000000..1023832
--- /dev/null
+++ b/extras/README
@@ -0,0 +1,3 @@
+
+Based on:
+http://phpmyadmin.svn.sourceforge.net/viewvc/*checkout*/phpmyadmin/trunk/phpMyAdmin/libraries/zip.lib.php?revision=10240
diff --git a/extras/zipfile.class.php b/extras/zipfile.class.php
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+++ b/extras/zipfile.class.php
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+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ *
+ * @version $Id$
+ */
+
+/**
+ * Zip file creation class.
+ * Makes zip files.
+ *
+ * Based on :
+ *
+ * http://www.zend.com/codex.php?id=535&single=1
+ * By Eric Mueller <eric@themepark.com>
+ *
+ * http://www.zend.com/codex.php?id=470&single=1
+ * by Denis125 <webmaster@atlant.ru>
+ *
+ * a patch from Peter Listiak <mlady@users.sourceforge.net> for last modified
+ * date and time of the compressed file
+ *
+ * Official ZIP file format: http://www.pkware.com/appnote.txt
+ *
+ * @access public
+ */
+class zipfile
+{
+ /**
+ * Array to store compressed data
+ *
+ * @var array $datasec
+ */
+ var $datasec = array();
+
+ /**
+ * Central directory
+ *
+ * @var array $ctrl_dir
+ */
+ var $ctrl_dir = array();
+
+ /**
+ * End of central directory record
+ *
+ * @var string $eof_ctrl_dir
+ */
+ var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
+
+ /**
+ * Last offset position
+ *
+ * @var integer $old_offset
+ */
+ var $old_offset = 0;
+
+
+ /**
+ * Converts an Unix timestamp to a four byte DOS date and time format (date
+ * in high two bytes, time in low two bytes allowing magnitude comparison).
+ *
+ * @param integer the current Unix timestamp
+ *
+ * @return integer the current date in a four byte DOS format
+ *
+ * @access private
+ */
+ function unix2DosTime($unixtime = 0) {
+ $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
+
+ if ($timearray['year'] < 1980) {
+ $timearray['year'] = 1980;
+ $timearray['mon'] = 1;
+ $timearray['mday'] = 1;
+ $timearray['hours'] = 0;
+ $timearray['minutes'] = 0;
+ $timearray['seconds'] = 0;
+ } // end if
+
+ return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
+ ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
+ } // end of the 'unix2DosTime()' method
+
+
+ /**
+ * Adds "file" to archive
+ *
+ * @param string file contents
+ * @param string name of the file in the archive (may contains the path)
+ * @param integer the current timestamp
+ *
+ * @access public
+ */
+ function addFile($data, $name, $time = 0)
+ {
+ $name = str_replace('\\', '/', $name);
+
+ $dtime = dechex($this->unix2DosTime($time));
+ $hexdtime = '\x' . $dtime[6] . $dtime[7]
+ . '\x' . $dtime[4] . $dtime[5]
+ . '\x' . $dtime[2] . $dtime[3]
+ . '\x' . $dtime[0] . $dtime[1];
+ eval('$hexdtime = "' . $hexdtime . '";');
+
+ $fr = "\x50\x4b\x03\x04";
+ $fr .= "\x14\x00"; // ver needed to extract
+ $fr .= "\x00\x00"; // gen purpose bit flag
+ $fr .= "\x08\x00"; // compression method
+ $fr .= $hexdtime; // last mod time and date
+
+ // "local file header" segment
+ $unc_len = strlen($data);
+ $crc = crc32($data);
+ $zdata = gzcompress($data);
+ $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
+ $c_len = strlen($zdata);
+ $fr .= pack('V', $crc); // crc32
+ $fr .= pack('V', $c_len); // compressed filesize
+ $fr .= pack('V', $unc_len); // uncompressed filesize
+ $fr .= pack('v', strlen($name)); // length of filename
+ $fr .= pack('v', 0); // extra field length
+ $fr .= $name;
+
+ // "file data" segment
+ $fr .= $zdata;
+
+ // "data descriptor" segment (optional but necessary if archive is not
+ // served as file)
+ // nijel(2004-10-19): this seems not to be needed at all and causes
+ // problems in some cases (bug #1037737)
+ //$fr .= pack('V', $crc); // crc32
+ //$fr .= pack('V', $c_len); // compressed filesize
+ //$fr .= pack('V', $unc_len); // uncompressed filesize
+
+ // add this entry to array
+ $this -> datasec[] = $fr;
+
+ // now add to central directory record
+ $cdrec = "\x50\x4b\x01\x02";
+ $cdrec .= "\x00\x00"; // version made by
+ $cdrec .= "\x14\x00"; // version needed to extract
+ $cdrec .= "\x00\x00"; // gen purpose bit flag
+ $cdrec .= "\x08\x00"; // compression method
+ $cdrec .= $hexdtime; // last mod time & date
+ $cdrec .= pack('V', $crc); // crc32
+ $cdrec .= pack('V', $c_len); // compressed filesize
+ $cdrec .= pack('V', $unc_len); // uncompressed filesize
+ $cdrec .= pack('v', strlen($name)); // length of filename
+ $cdrec .= pack('v', 0); // extra field length
+ $cdrec .= pack('v', 0); // file comment length
+ $cdrec .= pack('v', 0); // disk number start
+ $cdrec .= pack('v', 0); // internal file attributes
+ $cdrec .= pack('V', 32); // external file attributes - 'archive' bit set
+
+ $cdrec .= pack('V', $this -> old_offset); // relative offset of local header
+ $this -> old_offset += strlen($fr);
+
+ $cdrec .= $name;
+
+ // optional extra field, file comment goes here
+ // save to central directory
+ $this -> ctrl_dir[] = $cdrec;
+ } // end of the 'addFile()' method
+
+
+ /**
+ * Dumps out file
+ *
+ * @return string the zipped file
+ *
+ * @access public
+ */
+ function file()
+ {
+ $data = implode('', $this -> datasec);
+ $ctrldir = implode('', $this -> ctrl_dir);
+
+ return
+ $data .
+ $ctrldir .
+ $this -> eof_ctrl_dir .
+ pack('v', sizeof($this -> ctrl_dir)) . // total # of entries "on this disk"
+ pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
+ pack('V', strlen($ctrldir)) . // size of central dir
+ pack('V', strlen($data)) . // offset to start of central dir
+ "\x00\x00"; // .zip file comment length
+ } // end of the 'file()' method
+
+} // end of the 'zipfile' class
+?>
diff --git a/zipstream.php b/zipstream.php
new file mode 100644
index 0000000..03fb96b
--- /dev/null
+++ b/zipstream.php
@@ -0,0 +1,181 @@
+<?php
+
+#
+# ZipStream - Streamed, dynamically generated zip archives.
+# Paul Duncan <pabs@pablotron.org>
+#
+# Usage:
+#
+# # create a new zip stream object
+# $zs = new ZipStream();
+#
+# # list of local files
+# $files = array('foo.txt', 'bar.jpg');
+#
+# # read and add each file to the archive
+# foreach ($files as $path)
+# $zs->add_file($path, file_get_contents($path));
+#
+# # write archive footer to stream
+# $zs->finish();
+#
+class ZipStream {
+ var $files = array(),
+ $cdr_ofs = 0,
+ $ofs = 0;
+
+ #
+ # add_file - add a file to the archive
+ #
+ # Parameters:
+ #
+ # $name - path of file in archive (including directory).
+ # $data - contents of file
+ # $time - last-modified timestamp of file (optional)
+ #
+ # Example:
+ #
+ # $data = file_get_contents('foo.txt');
+ # $zs->add_file('foo.txt', $data);
+ #
+ function add_file($name, $data, $time = 0) {
+ # compress data
+ $zdata = substr(gzcompress($data), 2, -4);
+
+ # calculate header attributes
+ $crc = crc32($data));
+ $zlen = strlen($zdata));
+ $nlen = strlen($name);
+ $len = strlen($data));
+
+ # TODO: create unix timestamp
+
+ # build file header
+ $fields = array( # (from V.A of APPNOTE.TXT)
+ array('V', 0x04034b50), # local file header signature
+ array('v', 0x14), # version needed to extract
+ array('v', 0x00), # general purpose bit flag
+ array('v', 0x08), # compresion method (deflate)
+ array('v', 0x08), # file mod time (dos) FIXME
+ array('v', 0x08), # file mod date (dos) FIXME
+ array('V', $crc), # crc32 of data
+ array('V', $zlen), # compressed data length
+ array('V', $len), # uncompressed data length
+ array('v', $nlen), # filename length
+ array('v', 0), # extra data len
+ );
+
+ # pack fields
+ $ret = $this->pack_fields($fields) . $name . $zdata;
+ $full_len = strlen($ret);
+
+ # add to central directory record and increment offset
+ $this->add_to_cdr($name, $time, $crc, $zlen, $len, $full_len);
+
+ # print data
+ echo $ret;
+ }
+
+ #
+ # finish - Write zip footer to stream.
+ #
+ # Example:
+ #
+ # # add a list of files to the archive
+ # $files = array('foo.txt', 'bar.jpg');
+ # foreach ($files as $path)
+ # $zs->add_file($path, file_get_contents($path));
+ #
+ # # write footer to stream
+ # $zs->finish();
+ #
+ function finish() {
+ $this->add_cdr();
+ $this->clear();
+ }
+
+ function clear() {
+ $this->files = array(0;
+ $this->ofs = 0;
+ $this->cdr_ofs = 0;
+ }
+
+
+ ###################
+ # PRIVATE METHODS #
+ ###################
+
+ function add_to_cdr($name, $time, $crc, $zlen, $len, $full_len) {
+ $this->files[] = array($this->ofs, $name, $time, $crc32, $zlen, $len);
+ $this->ofs += $full_len;
+ }
+
+ function add_cdr_file($args) {
+ list ($name, $time, $crc32, $zlen, $len, $ofs) = $args;
+
+ $fields = array( # (from V,F of APPNOTE.TXT)
+ array('V', 0x02014b50), # central file header signature
+ array('v', 0x14), # version needed to extract
+ array('v', 0x00), # general purpose bit flag
+ array('v', 0x08), # compresion method (deflate)
+ array('v', 0x08), # file mod time (dos) FIXME
+ array('v', 0x08), # file mod date (dos) FIXME
+ array('V', $crc), # crc32 of data
+ array('V', $zlen), # compressed data length
+ array('V', $len), # uncompressed data length
+ array('v', $nlen), # filename length
+ array('v', 0), # extra data len
+ array('v', 0), # file comment length
+ array('v', 0), # disk number start
+ array('v', 0), # internal file attributes
+ array('V', 0), # external file attributes
+ array('V', $ofs), # relative offset of local header
+ );
+
+ # pack fields and append name
+ $ret = $this->pack_fields($fields) . $name;
+
+ # increment cdr offset
+ $this->cdr_ofs += strlen($ret);
+ }
+
+ function add_cdr_eof() {
+ $num = count($this->files);
+ $cdr_len = $this->cdr_ofs;
+ $cdr_ofs = $this->ofs;
+
+ $fields = array( # (from V,F of APPNOTE.TXT)
+ array('V', 0x06054b50), # end of central file header signature
+ array('v', 0x00), # disk number
+ array('v', 0x00), # number of disk with cdr
+ array('v', $num), # number of entries in the cdr on this disk
+ array('v', $num), # number of entries in the cdr
+ array('V', $cdr_len), # cdr size
+ array('V', $cdr_ofs), # cdr ofs
+ array('v', 0x00), # zip file comment length
+ );
+ }
+
+ function add_cdr() {
+ foreach ($this->files as $file)
+ $this->add_cdr_file($file);
+ $this->add_cdr_eof();
+ }
+
+ function pack_fields($fields) {
+ # populate format string and argument list
+ list ($pack_fmt, $args) = array('', array());
+ foreach ($fields as $field) {
+ $fmt .= $field[0];
+ $args[] = $field[1];
+ }
+
+ # prepend format string to argument list
+ array_unshift($args, $fmt);
+
+ # build output string from header and compressed data
+ return call_user_func('pack', $args));
+ }
+};
+
+?>