Initial commit.

3 files changed, 374 insertions, 0 deletions

diff --git a/extras/README b/extras/README
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+
+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));
+  }
+};
+
+?>