javascript - 使用node.js从url下载文件到服务器

Question

我需要将文件从任何 url 下载到运行应用程序的服务器。我在 Node.js 中使用了以下代码。它在本地主机的情况下工作。但在服务器的情况下则不然。

var express = require('express');
var app     = express();
var http    = require('http');
var https   = require('https');
var request = require('request');
var fs      = require('fs');
var path    = require('path');

app.get('/', function( request, response ){
    response.send('connection established...!');
});

app.get('/download', function(request, response){
    var file     = "https://c1.staticflickr.com/6/5219/5450451580_7f066f7868_b.jpg"; 

    var filename = path.basename( file );
    var ssl      = file.split(':')[0];
    var dest     = __dirname +'downloads/'+ filename;
    var stream   = fs.createWriteStream( dest );

    if ( ssl == 'https') {
        https.get( file, function( resp ) {
            resp.pipe( stream );
            response.send('file saved successfully.*');
        }).on('error', function(e) {
            response.send("error connecting" + e.message);
        });
    } else {
        http.get( file, function( resp ) {
            resp.pipe( stream );
            response.send('file saved successfully.*');
        }).on('error', function(e) {
            response.send("error connecting" + e.message);
        });
    }
});
app.listen(process.env.PORT || 3000);

Answer 1

你有服务器的写权限吗(假设你的本地是 mac/windows，服务器是 Linux 机器)？如果不分配权限