diff --git a/js/ui/webui/file.js b/js/ui/webui/file.js
new file mode 100644
index 0000000..3ecdcdf
--- /dev/null
+++ b/js/ui/webui/file.js
@@ -0,0 +1,395 @@
+FileDialog = {
+  locked : false,
+  lock : function () {
+    if (FileDialog.locked) return false;
+    FileDialog.locked=true;
+    return true;
+  },
+  unlock : function () { FileDialog.locked=false },
+  refreshFileDialog : function (handle) {
+    var lastselect;
+    console.log('refreshFileDialog',handle.dir);
+    handle.list(handle.dir, function (res) {
+      if (Utils.isError(res)) {
+        return handle.onerror(res);
+      }
+      var input=$('#fileDialogListFileName');
+      if (res && res.status==0) {
+        var list = $('#fileDialogList');
+        list.empty();
+        var entries=res.dirs;
+        if (handle.mode=='Open' || handle.mode=='Load') entries=entries.concat(res.files);
+        $('#fileDialogListLabel').html(handle.dir);
+        entries.forEach(function (entry) {
+          if (entry.name[0]=='.' && entry.name!='..') return;
+          var listentry = $('<p/>',{
+            class:'nav-entry '+(entry.dir?'nav-entry-directory':'nav-entry-file'),
+            style:'cursor: pointer'
+          }).append('<span>'+entry.name+'</span>').appendTo(list);
+          if (entry.dir)
+            listentry.bind('click',function () {
+              if (entry.name=='..')
+                handle.dir = handle.dir.replace(/(\/[^\/]+)$/,'');
+              else
+                handle.dir += ((handle.dir=='/'?'':'/')+entry.name);
+              handle.dir=handle.dir||'/'; 
+              handle.selected=entry.name;
+              FileDialog.refreshFileDialog(handle);
+            });
+          else {
+            listentry.bind('click',function () {
+              if (lastselect) $(lastselect).removeClass('nav-selected');
+              $(listentry).addClass('nav-selected');
+              lastselect=listentry;
+              handle.selected=entry.name;
+              input.val(entry.name);
+            });
+          }
+          return entry;
+        })
+      }
+    })  
+  },
+  dialog : function (title, mode, dir, filename, fs, callback) {
+    if (!FileDialog.lock()) return;
+    var handle={selected:filename, dir:dir, mode:mode, list:fs.list};
+    var html='<div><b>'+title+
+             '</b><br><hr><div style="word-wrap: break-word;"id="fileDialogListLabel"></div>';
+    html += '<input id="fileDialogListFileName" style="width:97%; height-max:400px; margin-top:5px;" value="'+filename+'">';
+    html += '<div id="fileDialogList">';
+    html += '</div></div>';
+    var input,options
+    handle.onerror=function (err) {
+      // Fallback: Browser file dialog
+      console.log('dialog',err);
+      options.close();
+      FileDialog.unlock();
+      if (callback) callback(null,null,err);
+    };
+    setTimeout(function () { FileDialog.refreshFileDialog(handle); input=$('#fileDialogListFileName'); },1);
+    popup.custom(options={content:html,default_btns:{ok:mode}},function (reply) {
+      FileDialog.unlock();
+      if (reply.proceed) {
+        filename=input.val();
+        if (callback) callback(handle.dir,filename);
+      }
+    });
+  },
+}
+
+
+if (!Config.wex) Config.wex={http:'http://localhost:11111' };
+if (!Config.workdir) Config.workdir='/';
+
+// FS APi using the WEX server
+FS = {
+  list : async function (dir,cb) {
+    var result;
+    function handler (response) {
+      if (Utils.isError(response)) {
+        if (cb) cb(response);
+        return;        
+      }
+      if (!Utils.isObject(response) || response.status!=0) {
+        result=response;
+        if (cb) cb(result);
+        return;
+      }
+      var dirs=response.reply.filter(function (entry) { return entry.dir })
+                             .sort(function (a,b) { return a.name<b.name?-1:1 }),
+          files=response.reply.filter(function (entry) { return !entry.dir })
+                              .sort(function (a,b) { return a.name<b.name?-1:1 });
+      result = {dirs:dirs,files:files,status:response.status};
+      if (cb) cb(result);
+    }
+    {
+      if (cb) {
+        Utils.POST(FS.url,{
+          command:  'list',
+          dir:  dir,
+        },handler,false);
+      } else {
+        return new Promise (function (resolve,reject) {
+          cb=resolve;
+          Utils.POST(FS.url,{
+            command:  'list',
+            dir:  dir,
+          },handler,false);      
+        })
+      }
+    }
+    return result;
+  },
+  load : async function(dir,file,mimetype,cb) { 
+    var result;
+    if (typeof mimetype == 'function') { cb=mimetype; mimetype='text' };
+    if (mimetype != 'binary') mimetype='text';
+    function handler(response) {
+      if (Utils.isError(response)) {
+        if (cb) cb(response);
+        return;        
+      }
+      if (!Utils.isObject(response) || response.status!=0) {
+        result=response;
+        if (cb) cb(result);
+        return;
+      }
+      result=response;
+      if (mimetype=='binary' && typeof result.reply=='string') result.reply=Buffer.from(result.reply,'binary');
+      if (cb) cb(result);          
+    } 
+    {
+      if (cb) Utils.POST(FS.url,{
+        command:  'load',
+        dir:  dir,
+        file: file,
+        mimetype : mimetype,
+      },handler,false);
+      else return new Promise (function (resolve,reject) {
+        cb=resolve;
+        Utils.POST(FS.url,{
+          command:  'load',
+          dir:  dir,
+          file: file,
+          mimetype : mimetype,
+        },handler,false);      
+      })
+    }
+    return result;
+  },
+  save : async function(dir,file,data,mimetype,cb) { 
+    var result;
+    if (typeof mimetype == 'function') { cb=mimetype; mimetype='text' };
+    if (mimetype != 'binary') mimetype='text';
+    function handler(response) {
+      if (Utils.isError(response)) {
+        if (cb) cb(response);
+        return;        
+      }
+      result=response;
+      if (cb) cb(result);          
+    }
+    // console.log(data.length);
+    {
+      if (cb) Utils.POST(FS.url,{
+        command:  'save',
+        dir   : dir,
+        file  : file,
+        data  : data,
+        mimetype : mimetype||'text',
+      },handler,false);
+      else return new Promise (function (resolve,reject) {
+        cb=resolve;
+        Utils.POST(FS.url,{
+          command:  'save',
+          dir   : dir,
+          file  : file,
+          data  : data,
+          mimetype : mimetype,
+        },handler,false)
+      })
+    }
+    return result;
+  },
+  shell : async function (exec,dir,cb) {
+    var result;
+    function handler(response) {
+      result=response;
+      if (cb) cb(result);
+    }    
+    {
+      if (cb) Utils.POST(FS.url,{
+          command:  'shell',
+          exec:  exec,
+          dir:   FS.workdir,
+      },handler,false);
+      else return new Promise (function (resolve,reject) {
+        cb=resolve;
+        Utils.POST(FS.url,{
+          command:  'shell',
+          exec:  exec,
+          dir:   FS.workdir,
+        },handler,false);
+      })
+    }
+    return result;
+  },
+  
+  url : Config.wex.url||Config.wex.http,
+  workdir : Config.workdir||'/',
+  workdirs : [],
+
+  // GUI API
+  API : {     
+    loadFile: function loadFile(mimetype,callback,workdirCustom) {
+      if (typeof callback == 'string') { workdirCustom=callback; callback=undefined; }
+      var api = FS, workdir=(workdirCustom?FS.workdirs[workdirCustom]||FS.workdir1:FS.workdir1)||FS.workdir;
+      FileDialog.dialog('Open','Open',
+        workdir,'',api,function (dir,filename,err) {
+        if (err) {
+          console.log('FS.loadFile',err);
+          if (callback) callback(err);
+          return;
+        }
+        if (workdirCustom) FS.workdirs[workdirCustom]=dir;
+        else FS.workdir1=dir;
+        api.load(dir,filename,mimetype, function (result) {
+          if (Utils.isError(result) || result.status!=0) return;
+          if (callback) callback(result.reply,filename,dir);        
+        });
+      });
+    },
+
+    saveFile: function saveFile(data, filename, mimetype, callback, workdirCustom) {
+      if (typeof callback == 'string') { workdirCustom=callback; callback=undefined; }
+      var api = FS, workdir=(workdirCustom?FS.workdirs[workdirCustom]||FS.workdir1:FS.workdir1)||FS.workdir;
+      FileDialog.dialog('Save','Save',
+        workdir,filename,api,function (dir,filename,err) {
+        if (err) {
+          console.log('FS.saveFile',err);
+          if (callback) callback(err);
+          return;
+        }
+        if (workdirCustom) FS.workdirs[workdirCustom]=dir;
+        else FS.workdir1=dir;
+        api.save(dir,filename,data,mimetype, function (stat) {
+          if (callback) callback(stat,filename,dir);        
+        })
+      });
+    },
+
+    importFile: function importFile(mimetype,callback) {
+      var api = FS;
+      FileDialog.dialog('Load Data','Load',
+        FS.workdir2||FS.workdir,'',api,function (dir,filename) {
+        FS.workdir2=dir;
+        api.load(dir,filename,mimetype, function (result) {
+          if (Utils.isError(result) || result.status!=0) return;
+          if (callback) callback(result.reply,filename,dir);        
+        });
+      });
+    },
+
+    exportFile:function exportFile(data, filename, mimetype, callback) {
+      var api = FS;
+      FileDialog.dialog('Save Data','Save',
+        FS.workdir2||FS.workdir,filename,api,function (dir,filename) {
+        FS.workdir2=dir;
+        api.save(dir,filename,data,mimetype, function (stat) {
+          if (callback) callback(stat,filename,dir);        
+        });
+      });
+    },
+
+    selectDirectory: function selectFile(title,callback, workdirCustom) {
+      if (typeof callback == 'string') { workdirCustom=callback; callback=undefined; }
+      var api = FS, workdir=(workdirCustom?FS.workdirs[workdirCustom]||FS.workdir2||FS.workdir1:FS.workdir2)||FS.workdir;;
+      FileDialog.dialog(title||'Select Directory','Open',
+        workdir,'',api,function (dir,filename) {
+        if (workdirCustom) FS.workdirs[workdirCustom]=dir;
+        else FS.workdir2=dir;
+        if (callback) callback(filename,dir);
+      });
+    },
+    selectFile: function selectFile(title,callback, workdirCustom) {
+      if (typeof callback == 'string') { workdirCustom=callback; callback=undefined; }
+      var api = FS, workdir=(workdirCustom?FS.workdirs[workdirCustom]||FS.workdir2||FS.workdir1:FS.workdir2)||FS.workdir;;
+      FileDialog.dialog(title||'Select File','Open',
+        workdir,'',api,function (dir,filename) {
+        if (workdirCustom) FS.workdirs[workdirCustom]=dir;
+        else FS.workdir2=dir;
+        if (callback) callback(filename,dir);
+      });
+    },
+  },
+  version : '1.2.5L',
+}
+
+PATH = {
+  basename : function (path,extension) {
+    if (path[path.length-1]=='/') return '/';
+    return extension?
+            path.split('/').reverse()[0].replace(RegExp(extension.replace(/\./,'\\.')+'$'),'')
+            :
+            path.split('/').reverse()[0];
+  },
+  dirname : function (path) {
+    var el=path.split('/');
+    el.pop();
+    return el.join('/');
+  },
+  
+  extension : function (file) {
+    return file.replace(/^[^\.]+\./,'');
+  }
+}
+
+function loadFile (cb,binary) {
+  if (Config.workdir) {
+    // Try WEX service?
+    return FS.API.loadFile(binary?'binary':'text',function (result,file) {
+      if (Utils.isError(result)) {
+        Config.workdir='';
+        return nativeDialog();
+      }
+      if (cb) cb(result,file);
+    })
+  }
+  function nativeDialog() {
+    var input = document.createElement('input');
+    input.type = 'file';
+    input.onchange = function (e) { 
+      // getting a hold of the file reference
+      var file = e.target.files[0]; 
+
+      // setting up the reader
+      var reader = new FileReader();
+      if (binary)
+        reader.readAsArrayBuffer(file);
+      else  
+        reader.readAsText(file,'UTF-8');
+
+       // here we tell the reader what to do when it's done reading...
+       reader.onload = function (readerEvent) {
+          var content = readerEvent.target.result; // this is the content!
+          // console.log( content );
+          if (binary)
+            cb(new Uint8Array(content),input.files[0].name);
+          else
+            cb(content,input.files[0].name)
+       }
+    }
+    input.click();
+  }
+  nativeDialog();
+}
+
+function saveFile(data, filename, mimetype, callback) {
+    if (Config.workdir) {
+      // Try WEX service?
+      return FS.API.saveFile(data, filename, mimetype||'text',function (stat,filename) {
+        if (Utils.isError(stat)) {
+          return nativeDialog();
+        }
+        callback(filename)
+      })
+    }
+    function nativeDialog() {
+      var file = new Blob([data], {type: mimetype});
+      if (window.navigator.msSaveOrOpenBlob) // IE10+
+          window.navigator.msSaveOrOpenBlob(file, filename);
+      else { // Others
+          var a = document.createElement("a"),
+              url = URL.createObjectURL(file);
+          a.href = url;
+          a.download = filename;
+          document.body.appendChild(a);
+          a.click();
+          setTimeout(function() {
+              document.body.removeChild(a);
+              window.URL.revokeObjectURL(url);  
+          }, 0); 
+      }
+    }
+}
+