如何使用node.js将文件的下载状态设置为数据表

时间：2015-11-13 06:10:59

标签： node.js

目前，我能够将文件的下载状态提供给控制台。但是现在我正在尝试在UI中显示状态。

我的index.js：

    #!/usr/bin/env node

var http = require('http');
var _ = require('lodash');
var express = require('express');
var fs = require('fs');
var path = require('path');
var util = require('util');
var program = require('commander');

//Downloading a file and displaying the status in the console
var request = require('request');
var progress = require('request-progress');
var DOWNLOAD_DIR = '/usr/local/';
var file_name = 'newgoogle.png' 

progress(request('https://www.google.com/images/srpr/logo3w.png'), {
    throttle:0,   
    delay: 0       
})
.on('progress', function (state) {
    console.log('received size in bytes', state.received);
    console.log('total size in bytes', state.total);
    console.log('percent', state.percent);
})
.pipe(fs.createWriteStream(DOWNLOAD_DIR + file_name))
.on('error', function (err) {
 console.log("error");  
})
.on('close', function (err){
console.log("Download Complete"); 
})


function collect(val, memo) {
  if(val && val.indexOf('.') != 0) val = "." + val;
  memo.push(val);
  return memo;
}

program
  .option('-p, --port <port>', 'Port to run the file-browser. Default value is 8088')
  .option('-e, --exclude <exclude>', 'File extensions to exclude. To exclude multiple extension pass -e multiple times. e.g. ( -e .js -e .cs -e .swp) ', collect, [])
  .parse(process.argv);

var app = express();
var dir =  process.cwd();
app.use(express.static(dir)); //app public directory
app.use(express.static(__dirname)); //module directory
var server = http.createServer(app);

if(!program.port) program.port = 8089;

server.listen(program.port);
console.log("Please open the link in your browser http://<YOUR-IP>:" + program.port);

app.get('/files', function(req, res) {
 var currentDir =  dir;
 var query = req.query.path || '';
 if (query) currentDir = path.join(dir, query);
 console.log("browsing ", currentDir);
 fs.readdir(currentDir, function (err, files) {
     if (err) {
        throw err;
      }
      var data = [];
      files
      .filter(function (file) {
          return true;
      }).forEach(function (file) {
        try {
                //console.log("processing ", file);
                var stats = fs.statSync(path.join(currentDir,file));
                var time = stats["atime"];
                var date = time.toString().substr(4,11);

                var isDirectory = fs.statSync(path.join(currentDir,file)).isDirectory();
                if (isDirectory) {
                  data.push({ Name : file,Date : date, IsDirectory: true, Path : path.join(query, file)  });
                } else {
                  var ext = path.extname(file);
                  if(program.exclude && _.contains(program.exclude, ext)) {
                    console.log("excluding file ", file);
                    return;
                  }       
                  data.push({ Name : file,Date:date, Ext : ext, IsDirectory: false, Path : path.join(query, file) });
                }

        } catch(e) {
          console.log(e); 
        }        

      });
      data = _.sortBy(data, function(f) { return f.Name});
      res.json(data);
  });
});


app.get('/', function(req, res) {
 res.redirect('lib/template.html'); 
});

app.get('/directory', function(req, res) {
  var currentDir =  dir;
  var query = req.query.path || '';
if (query) currentDir = path.join(dir, query);
      var data = { directory: currentDir }
  res.json(data);

});

我的app.js：

(function($){

        var extensionsMap = {
                      ".zip" : "fa-file-archive-o",         
                      ".gz" : "fa-file-archive-o",         
                      ".bz2" : "fa-file-archive-o",         
                      ".xz" : "fa-file-archive-o",         
                      ".rar" : "fa-file-archive-o",         
                      ".tar" : "fa-file-archive-o",         
                      ".tgz" : "fa-file-archive-o",         
                      ".tbz2" : "fa-file-archive-o",         
                      ".z" : "fa-file-archive-o",         
                      ".7z" : "fa-file-archive-o",         
                      ".mp3" : "fa-file-audio-o",         
                      ".cs" : "fa-file-code-o",         
                      ".c++" : "fa-file-code-o",         
                      ".cpp" : "fa-file-code-o",         
                      ".js" : "fa-file-code-o",         
                      ".xls" : "fa-file-excel-o",         
                      ".xlsx" : "fa-file-excel-o",         
                      ".png" : "fa-file-image-o",         
                      ".jpg" : "fa-file-image-o",         
                      ".jpeg" : "fa-file-image-o",         
                      ".gif" : "fa-file-image-o",         
                      ".mpeg" : "fa-file-movie-o",         
                      ".pdf" : "fa-file-pdf-o",         
                      ".ppt" : "fa-file-powerpoint-o",         
                      ".pptx" : "fa-file-powerpoint-o",         
                      ".txt" : "fa-file-text-o",         
                      ".log" : "fa-file-text-o",         
                      ".doc" : "fa-file-word-o",         
                      ".docx" : "fa-file-word-o",         
                    };

  function getFileIcon(ext) {
    return ( ext && extensionsMap[ext.toLowerCase()]) || 'fa-file-o';
  }



  var currentPath = null;
   var options = {
        "bProcessing": true,
        "bServerSide": false,
        "bPaginate": false,
        "bAutoWidth": false,
         "sScrollY":"250px",
      "fnCreatedRow" :  function( nRow, aData, iDataIndex ) {
    if (!aData.IsDirectory) return;
    var path = aData.Path;
    $(nRow).bind("click", function(e){
        $.get('/files?path='+ path).then(function(data){
            table.fnClearTable();
            table.fnAddData(data);
            currentPath = path;
        });


        $.get('/directory?path='+ path).then(function(data){        
            $("input[name='location']").val(data.directory);
           //$("#showDiv").hide();
         });         
    e.preventDefault();
    });
},



        "aoColumns": [{"sTitle":"File Name", "mData": null, "bSortable": false, "sClass": "head0", "sWidth": "55px",
            "render": function (data, type, row, meta) {
              if (data.IsDirectory) {
                return "<a href='#' target='_blank'><i class='fa fa-folder'></i>&nbsp;"  + data.Name +"</a>";
              } else {
                return "<a href='/" + data.Path + "' target='_balnk'><i class='fa " + getFileIcon(data.Ext) + "'></i>&nbsp;" + data.Name +"</a>";
              }
            }
          },
            {"sTitle":"Date",align: 'Center', "mData": null, "bSortable": false, "sClass": "head1", "sWidth": "55px",
            "render": function (data, type, row, meta) {
              if (data.IsDirectory) {
                 return  data.Date;
             }else{
               return data.Date;

             } 
            }
          },
        {"sTitle":"Status",align: 'Center', "mData": null, "bSortable": false, "sClass": "head1", "sWidth": "55px",
            "render": function (data, type, row, meta) {
              if (data.IsDirectory) {
                 return  data.Date;
             }else{
               return data.Date;

             }
            }
          }
        ]   

     };

  var table = $(".linksholder").dataTable(options);

  $.get('/files').then(function(data){
      table.fnClearTable();
      table.fnAddData(data);
  });

$.get('/directory').then(function(data){        
    $("input[name='location']").val(data.directory);
   $("#showDiv").hide();
});

$(".up").bind("click", function(e){
    if (!currentPath) return;
    var idx = currentPath.lastIndexOf("/");
    var path =currentPath.substr(0, idx);
    $.get('/files?path='+ path).then(function(data){
        table.fnClearTable();
        table.fnAddData(data);
        currentPath = path;
    });

$.get('/directory?path='+path).then(function(data){
    $("input[name='location']").val(data.directory);

 });

});
})(jQuery);

我的template.html：

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>File Browser</title>
    <link rel="stylesheet" href="/lib/bootstrap.min.css">
    <link rel="stylesheet" href="/lib/font-awesome/css/font-awesome.min.css">
    <link rel="stylesheet" href="/lib/app.css">
  </head>
  <body>
   <div id="panelDiv">

           <div class="panel-heading">
                   <button type="button" id="butDiv" >Browse</button>
                    <input type="text" name="location" size="35"/>
                   <span class="up">
                    <i class="fa fa-level-up"></i> Up
                   </span> 
           </div>
      <div id="showDiv" class="panel-body">
              <table class="linksholder">
              </table>
      </div>

  </div> 
    <script src="/lib/jquery.min.js"></script>
    <script src="/lib/bootstrap.min.js"></script>
    <script src="/lib/datatable/js/jquery.datatables.min.js"></script>
    <script src="/lib/app.js"></script>
<script>
$(document).ready(function(){

        $("#showDiv").hide();

});  

$("#butDiv").click(function(){
        $("#showDiv").show();

 });
</script>
</body>
</html>

目前的格式： enter image description here

在当前格式中，在状态列中，我试图显示下载是否已完成（或）已下载了多少百分比。任何人都可以帮助我进一步移动......

0 个答案:

没有答案
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