如何将文件（exe或rar）提供给客户端以便从node.js服务器下载？

我有一个node.js服务器，它为文件输入密码提供index.html服务。经过服务器端密码检查后，客户端应该开始下载。客户端应该无法看到文件位于服务器上的位置路径。如何将文件（exe或rar）提供给客户端以便从node.js服务器下载？

这里是我的server.js：

var 
    http = require('http'), 
    qs = require('querystring'), 
     fs = require('fs') ; 
console.log('server started'); 

var host = process.env.VCAP_APP_HOST || "127.0.0.1"; 
var port = process.env.VCAP_APP_PORT || 1337; 

http.createServer(function (req, res) { 

    if(req.method=='GET') { 

     console.log (' login request from ' + req.connection.remoteAddress); 



      fs.readFile(__dirname +'/index.html', function(error, content) { 
       if (error) { 
        res.writeHead(500); 
        res.end(); 
       } 
       else { 
        res.writeHead(200, { 'Content-Type': 'text/html' }); 
        res.end(content, 'utf-8'); 
       } 
      }); 


    } // method GET end 

    else{ // method POST start 


     console.log('POST request from ' + req.connection.remoteAddress); 
     var body = ''; 
     req.on('data', function (data) { 
      body += data; 

      if (body.length > 500) { 
       // FLOOD ATTACK OR FAULTY CLIENT, NUKE REQUEST 
       req.connection.destroy(); console.log('too much data')} 
     }); 

     req.on('end', function() { 

      var postdata = qs.parse(body); 
      var password = postdata.passwordpost ; 


     if (password == '7777777') { 
       console.log('the password is right, download starting'); 

      // ???????????????????????????????????       here I need help from stackoverflow 



     } 


      else{ 
      console.log ('password wrong'); 
      fs.readFile(__dirname +'/wrongpassword.html', function(error, content) { 
       if (error) { 
        res.writeHead(500); 
        res.end(); 
       } 
       else { 
        res.writeHead(200, { 'Content-Type': 'text/html' }); 
        res.end(content, 'utf-8'); 
       } 
      }); 
     } 
     });  // req on end function end 

    } 
}).listen(port, host);

在我需要帮助标有部分????????

这里是我的index.html：

<html> 
<body> 
<br> <br> 
&nbsp;&nbsp;&nbsp; please enter your password to start your download 
<br> <br> 

<form method="post" action="http://localhost:1337"> 
    &nbsp;&nbsp;&nbsp; 
    <input type="text" name="passwordpost" size="50"><br><br> 
    &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; 
    <input type="submit" value="download" /> 
</form> 

</body> 
</html>

你知道如何做到这一点？

来源

2013-05-11 Bud Wieser

当然，你可以在你的代码中使用此：

res.setHeader('Content-disposition', 'attachment; filename='+filename); 
//filename is the name which client will see. Don't put full path here. 

res.setHeader('Content-type', 'application/x-msdownload');  //for exe file 
res.setHeader('Content-type', 'application/x-rar-compressed'); //for rar file 

var file = fs.createReadStream(filepath); 
//replace filepath with path of file to send 
file.pipe(res); 
//send file

来源

2013-05-11 20:38:58 user568109

惊人的快速响应，将测试此之后，THX :) – 2013-05-11 20:54:10

只是复制粘贴此，我不得不问号和像你说的那样添加了文件路径，工作完美！ – 2013-05-11 21:37:37

您需要声明并要求path：path = require("path")

那么可以这样做：

var uri = url.parse(request.url).pathname 
    , filename = path.join(process.cwd(), uri); 

path.exists(filename, function(exists) { 
    if(!exists) { 
     response.writeHead(404, {"Content-Type": "text/plain"}); 
     response.write("404 Not Found\n"); 
     response.end(); 
     return; 
    } 
response.writeHead(200); 
response.write(file, "binary"); 
response.end(); 
}

检查这些完整example。

来源

2013-05-11 19:10:33 jmingov

哇，没想到在这里快速的答案，谢谢:) – 2013-05-11 20:52:22

我发现了大约fs.createReadStream（）（尤其是错误处理）here一些额外的信息，并与user568109的回答结合它。这是我的工作downloadserver：

var 
    http = require('http'), 
    qs = require('querystring'), 
     fs = require('fs') ; 
console.log('server started'); 

var host = process.env.VCAP_APP_HOST || "127.0.0.1"; 
var port = process.env.VCAP_APP_PORT || 1337; 

http.createServer(function (req, res) { 

    if(req.method=='GET') { 

     console.log (' login request from ' + req.connection.remoteAddress); 



      fs.readFile(__dirname +'/index.html', function(error, content) { 
       if (error) { 
        res.writeHead(500); 
        res.end(); 
       } 
       else { 
        res.writeHead(200, { 'Content-Type': 'text/html' }); 
        res.end(content, 'utf-8'); 
       } 
      }); 


    } // method GET end 

    else{ // method POST start 


     console.log('POST request from ' + req.connection.remoteAddress); 
     var body = ''; 
     req.on('data', function (data) { 
      body += data; 

      if (body.length > 500) { 
       // FLOOD ATTACK OR FAULTY CLIENT, NUKE REQUEST 
       req.connection.destroy(); console.log('too much data')} 
     }); 

     req.on('end', function() { 

      var postdata = qs.parse(body); 
      var password = postdata.passwordpost ; 


     if (password == '7777777') { 
       console.log('the password is right, download starting'); 


      res.setHeader('Content-disposition', 'attachment; filename='+'test1.exe'); 
//filename is the name which client will see. Don't put full path here. 

      res.setHeader('Content-type', 'application/x-msdownload');  //for exe file 
      res.setHeader('Content-type', 'application/x-rar-compressed'); //for rar file 

      var readStream = fs.createReadStream('/test1.exe'); 
//replace filepath with path of file to send 
      readStream.on('open', function() { 
       // This just pipes the read stream to the response object (which goes to the client) 
       readStream.pipe(res); 
      }); 

      // This catches any errors that happen while creating the readable stream (usually invalid names) 
      readStream.on('error', function(err) { 
       console.log (err) ; 
       res.writeHead(200, { 'Content-Type': 'text/html' }); 
       res.end('an error occured', 'utf-8'); 

      }); 
//send file 



     } 


      else{ 
      console.log ('password wrong'); 
      fs.readFile(__dirname +'/wrongpassword.html', function(error, content) { 
       if (error) { 
        res.writeHead(500); 
        res.end(); 
       } 
       else { 
        res.writeHead(200, { 'Content-Type': 'text/html' }); 
        res.end(content, 'utf-8'); 
       } 
      }); 
     } 
     });  // req on end function end 

    } 
}).listen(port, host);

来源

2013-05-12 15:03:29

如果你愿意用快递的web框架，那么就可以在一个更简单的方法来完成。

app.get('/download', function(req, res){ 
    var file = __dirname + 'learn_express.mp4'; 
    res.download(file); // Sets disposition, content-type etc. and sends it 
});

Express download API

来源

2014-09-10 08:24:23

如何将文件（exe或rar）提供给客户端以便从node.js服务器下载？

回答

相关问题