/usr/lib/nanoweb/modules/mod_unzip.php is in nanoweb 2.2.9-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138  | <?php
/*
 mod_unzip allows to access files inside a .zip archive, just be
 referencing them:
 http://localhost/path/packed.zip/subdir/index.html
 this of course only works if your PHP interpreter was compiled with
 zzlib support 
*/
class mod_unzip {
	var $modname = "transparent ZIP archive decompression";
	var $modtype = "parser_UNZIP";
	function mod_unzip() {
		if (!function_exists("zip_open")) {
			$this->modname .= " (disabled)";
			$this->modtype = "disabled";
		}
	}
	function parser_open($args, $filename, &$rq_err, &$cgi_headers) {
		global $path_info, $docroot, $add_errmsg, $rq_file, $mime, $http_uri, $pri_redir, $out_contenttype;
		if (empty($path_info)) {
			return(loadfile($docroot.$http_uri, $rq_file["extension"], $rq_err, $cgi_headers));
		}
		if (! ($this->ziphandle = zip_open($docroot.DIRECTORY_SEPARATOR.$filename))) {
			$rq_err = 500;
			$add_errmsg = "Accessed file was not in correct .ZIP format.";
		}
		else {
			$this->fp=$this->fpos=$this->size=0;
			$pi = trim($path_info, "/");
			$pi_dir = substr($path_info, strlen($path_info)-1) == "/";
			$dirname = false;
			$dirlist = array();
			while ($this->fp = zip_read($this->ziphandle)) {
				$fn = zip_entry_name($this->fp);
				$fn = ltrim(str_replace("\\", "/", $fn), "/");
				if ($fn == $pi) {
					break;
				}
				elseif (($dirname) && (strpos($fn, $dirname)===0) || ($dirname==="")){
					$is_dir = substr($fn, strlen($fn)-1) == "/";
					$fn = substr($fn, strlen($dirname));
					if (!strpos(trim($fn, "/"), "/")) {
						$dirlist[] = array("filename"=>$fn, "size"=>zip_entry_filesize($this->fp), "is_dir"=>$is_dir);
					}
				}
				elseif (($path_info == "/") || ($fn == $pi."/") && !zip_entry_filesize($this->fp)) {
					if ($pi_dir) {
						$dirname = $pi;
						$dirlist[] = array("filename"=>"..", "is_dir"=>1, "size"=>0);
					}
					else {
						$pri_redir = $http_uri . $path_info . "/";
						return;
					}
				}
			}
			if (!$this->fp) {
				if (count($dirlist) || ($dirname!==false)) {
					$rq_err = 501;
					$add_errmsg = "<h3>ZIP contents:</h3>\n";
					foreach ($dirlist as $i) {
						$add_errmsg .= ($i["is_dir"]?'[dir] ':'') . '<a href="'.$i["filename"].'">'.$i["filename"].'</a> ('.$i['size'].' bytes)<br>'."\n";
					}
					$add_errmsg .= "<br>\n";
				}
				else {
					$rq_err = 404;
				}
			}
			elseif (zip_entry_open($this->ziphandle, $this->fp, "rb")) {
				$this->size = zip_entry_filesize($this->fp);
				$this->fpos = 0;
				$http_uri .= $path_info;
				$rq_file = pathinfo($http_uri);
				($out_contenttype = $mime[strtolower($rq_file["extension"])]) or ($out_contenttype = $default_ct);
				$cgi_headers["X-Powered-By"] = "zziplib";
				$cgi_headers["Content-Length"] = $this->size;
			}
		}
	}
	function parser_get_output() {
		$buf = zip_entry_read($this->fp, 16384);
		if ($n = strlen($buf)) {
			$this->fpos += $n;
			return($buf);
		}
		else {
			$GLOBALS["rq_err"] = 500;
			$this->fpos = $this->size;
		}
	}
	function parser_eof() {
		return($this->fpos < $this->size);
	}
	function parser_close() {
		zip_entry_close($this->fp);
		zip_close($this->ziphandle);
	}
}
?>
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