从node.js中的webservice下载.pdf文件 [英] Download a .pdf file from a webservice in node.js

问题描述

浏览器直接访问外部Web服务，将用户带到网页，根据网址传递的参数处理请求，然后直接在浏览器视图中返回pdf文件。



我正在开发一个应用程序，旨在调用此Web服务并将生成的.pdf文件返回给用户。



我尝试了什么：



为了得到这个，我尝试使用请求npm包，如下所示：

There's an external webservice accessed directly by browser that takes the user to a web page which deals the request according to the parameters passed in the url and then returns a pdf file directly in the browser view.

I'm working on an application that aims to make a call to this webservice and return a generated .pdf file to the user.

What I have tried:

To get this I tried to use the request npm package as follows:

var request = Meteor.npmRequire ( 'request');

request.GET ({
              url: this_nfse.link_nfse, timeout: 1500 jar: true,
              encoding: 'binary'
              }
             , Meteor.bindEnvironment (function (error, response, body) {
                 if (!error && response)
                 {
                 // Handle result according to the application purpose
                 }
            }));

但我得到的身体对象是处理pdf文件请求时负责的html页面，而不是文件或其自身的表示。



我是nodejs / meteor的初学者，任何欢迎提供帮助。

But the body object that I get is the html page that is reponsible in deal with the pdf file request, not the file or representation of itself.

I'm a beginner in nodejs/meteor, and any help will welcome.

推荐答案

你可以试试。我已经为此工作了。这个例子对你有帮助。

You can try. I have already worked for this. This example will help you.

var path = require('path');
var mime = require('mime');

app.get('/download', function(req, res){

  var file = __dirname + '/upload-folder/dramaticpenguin.MOV';

  var filename = path.basename(file);
  var mimetype = mime.lookup(file);

  res.setHeader('Content-disposition', 'attachment; filename=' + filename);
  res.setHeader('Content-type', mimetype);

  var filestream = fs.createReadStream(file);
  filestream.pipe(res);
});file);
  filestream.pipe(res);
});

如果你想将文件发送到前端以获取句柄，然后您可以尝试：

If you want to send the file to front end for handle then you can try :

exports.sendPdf = function(req, res) {

  var donneRecu = req.body;

  console.log(donneRecu['lien']);

  var url = donneRecu['lien']; //pdf link

  http.get(url, function(response) {

      var chunks = [];

      response.on('data', function(chunk) {

          console.log('downloading');

          chunks.push(chunk);

      });

      response.on("end", function() {
          console.log('downloaded');
          var jsfile = new Buffer.concat(chunks).toString('base64');
          console.log('converted to base64');
          res.header("Access-Control-Allow-Origin", "*");
          res.header("Access-Control-Allow-Headers", "X-Requested-With");
          res.header('content-type', 'application/pdf');
          res.send(jsfile);
      });
  }).on("error", function() {
      callback(null);
  }); 
}

这篇关于从node.js中的webservice下载.pdf文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！