angularjs - express 4 : How do I send JSON object to view?

Question

我研究了几天，但我无法弄清楚这个问题。

目标:用户使用 angular-file-upload 表单上传文本文件，然后 multer 将文件保存到临时文件夹。然后数据会 POST，用户可以在同一页面或重定向页面上查看文件元数据和内容。

问题:在我的 POST 路由中，我可以 console.log(req.file) 并且它显示文件元数据。文件保存到临时文件夹。

我尝试过 res.send(req.file)、res.json(req.file)、数据绑定(bind) Controller 范围中的元数据、res.locals、中间件函数以及许多其他我什至不记得的东西。 json 对象永远不会到达 View 。

这是我正在处理的内容的片段。

routes.js

var express = require('express');
var app = express();
var router = express.Router();

router.get('/test', function(req, res, next){
  res.render('test', {title: 'Test'});
});

router.post('/test', function(req, res, next){
  console.log(req.file);
  res.json(req.file);
});

module.exports = router;

app.js

var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var logger = require('morgan');
var sys = require('sys');
var multer = require('multer');
var app = express();
 // Local Files
var routes = require('./routes/index');
var users = require('./routes/users');
var favicon = require('serve-favicon');
// console.log(__dirname + '/public/scripts/test.py');

// Create multer object for file uploads
var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, './tmp/')
  }
  // filename: function (req, file, cb) {
  //   cb(null, file.originalname + "%" + Date.now())
  // }
});

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(cookieParser());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
// app.use(express.bodyParser( { keepExtensions: true, uploadDir: __dirname + '/photos' } ));
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'bower_components')));
app.use(multer({ storage: storage }).single('file'));
app.use('/', routes);
app.use('/users', users);

controller.js

var t = angular.module('upload', ['ngFileUpload']);

t.controller('ctrl', ['$scope', 'Upload', '$timeout', function ($scope, Upload, $timeout) {
    $scope.f = '';
    $scope.uploadFiles = function(file) {
        $scope.f = file;
        console.log(file);
        if (file && !file.$error) {
            file.upload = Upload.upload({
                url: '/test',
                file: file
            });
            file.upload.then(function (response) {
                $timeout(function () {
                    file.result = response.data;
                });
            }, function (response) {
                if (response.status > 0)
                    $scope.errorMsg = response.status + ': ' + response.data;
            });
            file.upload.progress(function (evt) {
                file.progress = Math.min(100, parseInt(100.0 * evt.loaded / evt.total));
            });
        }
    }
}]);

req.file

{ fieldname: 'file',
  originalname: 'lorem.rtf',
  encoding: '7bit',
  mimetype: 'text/rtf',
  destination: './tmp/',
  filename: '0b9d25cc663a05628059bd56a0aef4bc',
  path: 'tmp/0b9d25cc663a05628059bd56a0aef4bc',
  size: 815 }

Answer 1

您始终可以尝试 JSON.stringify 来序列化它。查看是否正确渲染 req.file 。您仍然可以手动将 header 设置为 text/json。