pnacl/crftp.js

   1 // Written by Mike Frysinger <vapier@gmail.com>.  Released into the public domain.  Suck it.
   2
   3 function $(s) { return document.querySelector(s); }
   4
   5 var crftp = (function() {
   6
   7         var nacl_module = null;
   8
   9         var mimeType = 'application/x-pnacl';
  10
  11         // Generate the NaCl module.  We do this on the fly so we can attach to events
  12         // in the parent element in case loading the NaCl module crashed.
  13         function create(nmf)
  14         {
  15                 // Attach listeners early.
  16                 var listener = document.getElementById('listener');
  17                 listener.addEventListener('load', moduleDidLoad, true);
  18                 listener.addEventListener('message', handleMessage, true);
  19                 listener.addEventListener('error', handleError, true);
  20                 listener.addEventListener('crash', handleCrash, true);
  21
  22                 // Create the NaCl module.
  23                 var embed = nacl_module = document.createElement('embed');
  24                 embed.name = embed.id = 'nacl_module';
  25                 // Don't hide it in case there is a plugin/load error.
  26                 embed.width = embed.height = 200;
  27                 embed.src = nmf;
  28                 embed.type = mimeType;
  29
  30                 // Attach it to the DOM so it'll start running.
  31                 listener.appendChild(embed);
  32
  33                 crftp.module = nacl_module;
  34         }
  35
  36         function handleError(event)
  37         {
  38                 set_status('ERROR [' + nacl_module.lastError + ']');
  39         }
  40
  41         function handleCrash(event)
  42         {
  43                 if (nacl_module.exitStatus == -1)
  44                         set_status('CRASHED');
  45                 else
  46                         set_status('EXITED [' + nacl_module.exitStatus + ']');
  47                 set_ui(false);
  48         }
  49
  50         function moduleDidLoad()
  51         {
  52                 set_status('RUNNING');
  53                 nacl_module.style.height = '0';
  54
  55                 set_ui(true);
  56                 $('#connect').focus();
  57         }
  58
  59         // Callback from the NaCl module (PPB_Messaging.PostMessage).
  60         var levels = Array('status', 'response', 'cmd', 'error', 'release');
  61         function handleMessage(message_event)
  62         {
  63                 if (typeof message_event.data == "string") {
  64                         log(message_event.data, levels[0]);
  65                 } else {
  66                         var event = message_event.data[0];
  67                         var data = message_event.data[1];
  68                         if (event == 4)
  69                                 URL.revokeObjectURL(data);
  70                         else
  71                                 log(data, levels[event]);
  72                 }
  73         }
  74
  75         // Unload the NaCl module.
  76         function destroy()
  77         {
  78                 nacl_module.parentNode.removeChild(nacl_module);
  79                 crftp.module = nacl_module = null;
  80         }
  81
  82         var log_ele = undefined;
  83         function log(message, opt_class)
  84         {
  85                 var span = document.createElement('span');
  86                 span.className = opt_class || 'status';
  87                 if (message.substr(-1) != '\n')
  88                         message += '\n';
  89                 span.textContent = message;
  90                 log_ele.appendChild(span);
  91                 log_ele.scrollTop = log_ele.scrollHeight;
  92         }
  93
  94         var status_ele = undefined;
  95         function set_status(status)
  96         {
  97                 status_ele.innerHTML = status;
  98         }
  99
 100         function initialize(nmf)
 101         {
 102                 set_ui(false);
 103
 104                 log_ele = document.getElementById('log');
 105                 status_ele = document.getElementById('status');
 106
 107                 set_status('Page loaded');
 108
 109                 // See if NaCl is even supported.  Makes debugging easier.
 110                 if (navigator.mimeTypes[mimeType] === undefined) {
 111                         set_status('Browser does not support ' + mimeType + ' or is disabled');
 112
 113                 // We're good, so try loading the module if needed.
 114                 } else if (nacl_module == null) {
 115                         set_status('Loading NaCl module');
 116                         create(nmf);
 117                 } else {
 118                         set_status('Waiting');
 119                 }
 120         }
 121
 122         function postMessage()
 123         {
 124                 var args = Array.prototype.slice.call(arguments);
 125                 nacl_module.postMessage(args);
 126         }
 127
 128         function connect(host, opt_port, opt_user, opt_pass)
 129         {
 130                 if (opt_port === undefined) {
 131                         if (host.indexOf(':') == -1)
 132                                 host += ':21';
 133                 } else
 134                         host += ':' + port
 135
 136                 postMessage('connect', host);
 137
 138                 if (opt_user !== undefined)
 139                         login(opt_user, opt_pass);
 140         }
 141
 142         function login(user, opt_pass)
 143         {
 144                 var pass = opt_pass || 'luser@crftp';
 145                 postMessage('login', user, pass);
 146         }
 147
 148         function disconnect()
 149         {
 150                 postMessage('disconnect');
 151         }
 152
 153         function chdir(path)
 154         {
 155                 postMessage('chdir', path);
 156         }
 157         function dir(path)
 158         {
 159                 postMessage('dir', path);
 160         }
 161         function list(path)
 162         {
 163                 postMessage('list', path);
 164         }
 165         function put(files)
 166         {
 167                 files.forEach(function(file) {
 168                         var url = file[0], name = file[1];
 169                         postMessage('put', url, name);
 170                 });
 171         }
 172         function get(files)
 173         {
 174                 files.forEach(function(file) {
 175                         var url = file[0], name = file[1];
 176                         postMessage('get', url, name);
 177                 });
 178         }
 179
 180         return {
 181                 module: null,
 182
 183                 create: create,
 184                 destroy: destroy,
 185                 initialize: initialize,
 186
 187                 connect: connect,
 188                 disconnect: disconnect,
 189                 login: login,
 190                 chdir: chdir,
 191                 dir: dir,
 192                 list: list,
 193                 put: put,
 194                 get: get,
 195                 raw: postMessage,
 196         };
 197
 198 }());