gemini.class.php

   1 <?php
   2 error_reporting(E_ALL);
   3 set_time_limit(0);
   4 ob_implicit_flush();
   5
   6 class Gemini {
   7
   8         function __construct($config) {
   9                 if(empty($config['certificate_file']))
  10                         die("Missing certificate file.  Edit config.php\n");
  11                 $this->ip = "0";
  12                 $this->port = "1965";
  13                 $this->data_dir = "hosts/";
  14                 $this->default_host_dir = "default/";
  15                 $this->default_index_file = "index.gemini";
  16                 $this->logging = 1;
  17                 $this->log_file = "logs/gemini-php.log";
  18                 $this->log_sep = "\t";
  19                 $settings = array('ip', 'port', 'data_dir', 'default_host_dir', 'default_index_file',
  20                                 'certificate_file', 'certificate_passphrase');
  21                 foreach($settings as $setting_key) {
  22                         if(!empty($config[$setting_key]))
  23                                 $this->$setting_key = $config[$setting_key];
  24                 }
  25                 // append the required filepath slashes if they're missing
  26                 if(substr($this->data_dir, -1) != "/")
  27                         $this->data_dir .= "/";
  28                 if(substr($this->default_host_dir, -1) != "/")
  29                         $this->default_host_dir .= "/";
  30                 if($this->logging) {
  31                         if(!file_exists($this->log_file)) {
  32                                 $this->log_to_file("Log created", null, null, null, null);
  33                         }
  34                         if(!is_writable($this->log_file)) {
  35                                 die("{$this->log_file} is not writable.\n");
  36                         }
  37                 }
  38                 if(!is_readable($this->certificate_file))
  39                         die("Certificate file {$this->certificate_file} not readable.\n");
  40         }
  41
  42         function parse_request($request) {
  43                 $url = trim($request); // strip <CR><LF> from the end
  44                 return parse_url($url);
  45         }
  46
  47         function get_valid_hosts() {
  48                 $dirs = array_map('basename', glob($this->data_dir.'*', GLOB_ONLYDIR));
  49                 return $dirs;
  50         }
  51
  52         function get_status_code($filepath) {
  53                 if(is_file($filepath) and file_exists($filepath))
  54                         return "20";
  55                 if(!file_exists($filepath))
  56                         return "51";
  57                 return "50";
  58         }
  59
  60         function get_mime_type($filepath) {
  61                 $type = mime_content_type($filepath);
  62                 // we need a way to detect gemini file types, which PHP doesn't
  63                 // so.. if it ends with gemini (or if it has no extension), assume
  64                 $path_parts = pathinfo($filepath);
  65                 if(empty($path_parts['extension']) or $path_parts['extension'] == "gemini")
  66                         $type = "text/gemini";
  67                 return $type;
  68         }
  69
  70         /**
  71         * Gets the full file path (assumes directory structure based on host)
  72         *
  73         * This function determines where the requested file is stored
  74         * based on the hostname supplied in the request from the client.
  75         * If no host is supplied, the default directory is assumed.
  76         *
  77         * @param array $url An array returned by the parse_request() method
  78         *
  79         * @return string
  80         */
  81         function get_filepath($url) {
  82                 $hostname = "";
  83                 if(!is_array($url))
  84                         return false;
  85                 if(!empty($url['host']))
  86                         $hostname = $url['host'];
  87
  88                 $valid_hosts = $this->get_valid_hosts();
  89                 if(!in_array($hostname, $valid_hosts))
  90                         $hostname = "default";
  91
  92                 // Kristall Browser is adding "__" to the end of the filenames
  93                 // wtf am I missing?
  94                 $url['path'] = str_replace("__", "", $url['path']);
  95                 // force an index file to be appended if a filename is missing
  96                 if(empty($url['path'])) {
  97                         $url['path'] = "/".$this->default_index_file;
  98                 } elseif(substr($url['path'], -1) == "/") {
  99                         $url['path'] .= $this->default_index_file;
 100                 }
 101
 102                 return $this->data_dir.$hostname.$url['path'];
 103         }
 104
 105         function log_to_file($ip, $status_code, $meta, $filepath, $filesize) {
 106                 $ts = date("Y-m-d H:i:s", strtotime('now'));
 107                 $this->log_sep;
 108                 $str = $ts.$this->log_sep.$ip.$this->log_sep.$status_code.$this->log_sep.
 109                 $meta.$this->log_sep.$filepath.$this->log_sep.$filesize."\n";
 110                 file_put_contents($this->log_file, $str, FILE_APPEND);
 111         }
 112 }
 113
 114 ?>