我正在使用一个名为angular-file-upload的AngularJS指令。我已经设置好了,图片上传工作正常,但我似乎无法将文件解析到服务器端(表达js)。
玉:
input.form-input(ng-model="userAvatarFile" ng-file-select="onFileSelect($files)" name="userAvatarFile" type="file")
这是AngularJS的代码:
$scope.onFileSelect = function($files) {
console.log($files);
for (var i = 0; i < $files.length; i++) {
var file = $files[i];
$scope.upload = $upload.upload({
url: '/api/user/upload',
method: 'POST',
data: {myObj: $scope.userAvatarFile},
file: file,
}).progress(function(evt) {
console.log('percent: ' + parseInt(100.0 * evt.loaded / evt.total));
}).success(function(data, status, headers, config) {
console.log(data);
});
}
};
并表达:
exports.upload = function(req, res) {
console.log(req.body);
console.log(req.files);
};
控制台总是打印出以下快递:
{}
undefined
任何想法可能出错?
答案 0 :(得分:0)
在Connect 3.0中删除了多部分中间件。 Connect建议connect-multiparty
或connect-busboy
。恕我直言connect-busboy
更好,所以这里是如何做到的:
(当然,运行npm install --save connect-busboy
)
// Main file, stays the same for all the other examples
var express = require('express'),
busboy = require('connect-busboy');
app.use(busboy({ immediate: true }));
// Route file
exports.upload = function (req, res) {
req.busboy.on('file', function (fieldname, file, filename) {
// fieldname will be 'file', file will be... um... the file (in binary encoding), filename will be the file's name
});
req.busboy.on('field', function (key, value) {
// key will be 'myObj', value will be $scope.userAvatarFile
});
};
如果要将图像保存到文件,可以执行以下操作:
exports.upload = function (req, res) {
req.busboy.on('file', function (fieldname, file, filename) {
// saveTo is the temporary path
var saveTo = path.join(os.tmpDir(), path.basename(fieldname));
file.pipe(fs.createWriteStream(saveTo));
// Do stuff with saveTo
});
};
然而,这是一个安全风险(保存到磁盘,这就是为什么req.files不再存在),所以大多数(?)库使用文件(例如Cloudinary)提供WriteStream(或看起来像什么感觉就像一个)。以下是Cloudinary的工作原理:
exports.upload = function (req, res) {
req.busboy.on('file', function (fieldname, file, filename) {
var stream = cloudinary.uploader.upload_stream(function(result) { console.log(result); });
// You should have been able to do file.pipe(stream), but Cloudinary's stream isn't a real WriteStream, but just an object with two functions. Well, the following works too:
file.on('data', stream.write);
file.on('end', stream.end);
});
};
FWIW,我复制了你的代码并测试了它,它运行得很好。如果你有任何问题,请告诉我。一周前我遇到了同样的问题,所以我要调查一下。
答案 1 :(得分:0)
tgkokk's示例不再适用于Cloudinary v1.1.1。 Cloudinary更新了upload_stream方法以返回Transform流对象。所以使用&#39; pipe&#39;而不是手动添加事件(&#39;数据&#39;)和(&#39;结束&#39;)。
https://github.com/cloudinary/cloudinary_npm#version-11-upload_stream-change-notes
exports.upload = function (req, res) {
req.busboy.on('file', function (fieldname, file, filename) {
var stream = cloudinary.uploader.upload_stream(function(result) { console.log(result);
});
// pipe can be used now
file.pipe(stream);
});
};