Question

我是AngularJS和Node.js的新手。

我想使用REST API，AngularJS和Express.js实现文件（.pdf，.jpg，.doc）上传功能。

我试图从Use NodeJS to upload file in an API call获得一个想法，但我仍然不清楚如何在REST API中使用AngularJS和Express.js上传文件。

有人可以向我解释如何使用REST API在AngularJS和Express.js中上传文件，并提供基本示例吗？

Answer 1

参考： https://github.com/danialfarid/angular-file-upload
我使用以下代码解决了这个问题：

Angularjs

HTML

<input type="file" ng-file-select="onFileSelect($files)" multiple>

JS

  $scope.onFileSelect = function($files) {
    //$files: an array of files selected, each file has name, size, and type.
    for (var i = 0; i < $files.length; i++) {
      var file = $files[i];
      $scope.upload = $upload.upload({
        url: 'server/upload/url', //upload.php script, node.js route, or servlet url
        // method: 'POST' or 'PUT',
        // headers: {'header-key': 'header-value'},
        // withCredentials: true,
        data: {myObj: $scope.myModelObj},
        file: file, // or list of files: $files for html5 only
        /* set the file formData name ('Content-Desposition'). Default is 'file' */
        //fileFormDataName: myFile, //or a list of names for multiple files (html5).
        /* customize how data is added to formData. See #40#issuecomment-28612000 for sample code */
        //formDataAppender: function(formData, key, val){}
      }).progress(function(evt) {
        console.log('percent: ' + parseInt(100.0 * evt.loaded / evt.total));
      }).success(function(data, status, headers, config) {
        // file is uploaded successfully
        console.log(data);
      });
      //.error(...)
      //.then(success, error, progress); 
      //.xhr(function(xhr){xhr.upload.addEventListener(...)})// access and attach any event listener to XMLHttpRequest.
    }
    /* alternative way of uploading, send the file binary with the file's content-type.
       Could be used to upload files to CouchDB, imgur, etc... html5 FileReader is needed. 
       It could also be used to monitor the progress of a normal http post/put request with large data*/
    // $scope.upload = $upload.http({...})  see 88#issuecomment-31366487 for sample code.
  };

使用expressJS

的Nodej

var path = require('path'),
    fs = require('fs');
var tempPath = req.files.file.path,
    targetPath = path.resolve('./uploadFiles/' + req.files.file.name);
fs.rename(tempPath, targetPath, function(err) {
if (err) throw err;
console.log("Upload completed!");

Answer 2

我最近一直在处理类似的问题。事实上，angular并不是对输入类型＆＃34; file＆＃34;的最佳支持，因为你不能双向绑定它。这就是人们为此制定自定义指令的原因。我使用的那个有一些简洁的例子。

它被称为angular-file-upload

使用REST API在ExpressJS和AngularJS中上传文件

2 个答案:

Angularjs

使用expressJS