Node.js 在multer上载文件之前获取除文件以外的其他字段的req.body
我有一个使用multer上传文件的函数:Node.js 在multer上载文件之前获取除文件以外的其他字段的req.body,node.js,multer,Node.js,Multer,我有一个使用multer上传文件的函数: exports.create = (req, res) => { console.log("req.body1 : ") console.log(req.body) var fileFilter = function (req, file, cb) { console.log("req.body2: ") console.log(req.body) // supported i
exports.create = (req, res) => {
console.log("req.body1 : ")
console.log(req.body)
var fileFilter = function (req, file, cb) {
console.log("req.body2: ")
console.log(req.body)
// supported image file mimetypes
var allowedMimes = ['image/jpeg', 'image/pjpeg', 'image/png', 'image/gif'];
if (_.includes(allowedMimes, file.mimetype)) {
// allow supported image files
cb(null, true);
} else {
// throw error for invalid files
cb(new Error('Invalid file type. Only jpg, png and gif image files are allowed.'));
}
};
let upload = multer({
storage: multer.diskStorage({
destination: (req, file, callback) => {
console.log("req.body3 : ")
console.log(req.body)
let userId = req.params.userId;
let pathToSave = `./public/uploads/${userId}/store`;
fs.mkdirsSync(pathToSave);
callback(null, pathToSave);
},
filename: (req, file, callback) => {
callback(null, uuidv1() + path.extname(file.originalname));
}
}),
limits: {
files: 5, // allow only 1 file per request
fileSize: 5 * 1024 * 1024, // 5 MB (max file size)
},
fileFilter: fileFilter
}).array('photo');
upload(req, res, function (err) {
console.log("req.body4 : ")
console.log(req.body)
...
...
req.body :
{}
req.body2:
{}
req.body3 :
{}
req.body4 :
{ name: '1111111111',
price: '1212',
cid: '1',
...
正如您所看到的,有很多console.log通过POST方法打印出传入数据的信息。奇怪的是,文件以外的字段直到进入上次上传功能后才会出现
所以问题是,我无法使用这些字段验证内容,直到它到达最后一个上传函数。因此,如果文件以外的其他字段中存在任何错误,我无法取消和删除上传的文件
以下是上述代码的输出:
exports.create = (req, res) => {
console.log("req.body1 : ")
console.log(req.body)
var fileFilter = function (req, file, cb) {
console.log("req.body2: ")
console.log(req.body)
// supported image file mimetypes
var allowedMimes = ['image/jpeg', 'image/pjpeg', 'image/png', 'image/gif'];
if (_.includes(allowedMimes, file.mimetype)) {
// allow supported image files
cb(null, true);
} else {
// throw error for invalid files
cb(new Error('Invalid file type. Only jpg, png and gif image files are allowed.'));
}
};
let upload = multer({
storage: multer.diskStorage({
destination: (req, file, callback) => {
console.log("req.body3 : ")
console.log(req.body)
let userId = req.params.userId;
let pathToSave = `./public/uploads/${userId}/store`;
fs.mkdirsSync(pathToSave);
callback(null, pathToSave);
},
filename: (req, file, callback) => {
callback(null, uuidv1() + path.extname(file.originalname));
}
}),
limits: {
files: 5, // allow only 1 file per request
fileSize: 5 * 1024 * 1024, // 5 MB (max file size)
},
fileFilter: fileFilter
}).array('photo');
upload(req, res, function (err) {
console.log("req.body4 : ")
console.log(req.body)
...
...
req.body :
{}
req.body2:
{}
req.body3 :
{}
req.body4 :
{ name: '1111111111',
price: '1212',
cid: '1',
...
文件上传是通过console.log(“req.body3:”)完成的。然后它在console.log(“req.body4:”)中输出其他字段。我需要出现在req.body4中的其他字段在实际上载文件之前验证内容。但我不能,因为这些字段是在上传文件后检索的
在multer实际上传文件之前,如何获取其他人的字段
===============================================
追加:
exports.create = (req, res) => {
console.log("req.body1 : ")
console.log(req.body)
var fileFilter = function (req, file, cb) {
console.log("req.body2: ")
console.log(req.body)
// supported image file mimetypes
var allowedMimes = ['image/jpeg', 'image/pjpeg', 'image/png', 'image/gif'];
if (_.includes(allowedMimes, file.mimetype)) {
// allow supported image files
cb(null, true);
} else {
// throw error for invalid files
cb(new Error('Invalid file type. Only jpg, png and gif image files are allowed.'));
}
};
let upload = multer({
storage: multer.diskStorage({
destination: (req, file, callback) => {
console.log("req.body3 : ")
console.log(req.body)
let userId = req.params.userId;
let pathToSave = `./public/uploads/${userId}/store`;
fs.mkdirsSync(pathToSave);
callback(null, pathToSave);
},
filename: (req, file, callback) => {
callback(null, uuidv1() + path.extname(file.originalname));
}
}),
limits: {
files: 5, // allow only 1 file per request
fileSize: 5 * 1024 * 1024, // 5 MB (max file size)
},
fileFilter: fileFilter
}).array('photo');
upload(req, res, function (err) {
console.log("req.body4 : ")
console.log(req.body)
...
...
req.body :
{}
req.body2:
{}
req.body3 :
{}
req.body4 :
{ name: '1111111111',
price: '1212',
cid: '1',
...
我发现如果我使用.any()而不是.array('photo'),那么我可以访问字段和文件。但问题仍然是,它首先上传这些文件,然后让我访问位于console.log(“req.body4:”)底部的uploads函数中的那些字段所以问题仍然是,在我需要使用这些字段进行验证之前,先上载文件。您应该在
正文中只接收一个对象,这样您就可以像访问任何其他对象一样访问它
{
object1: 'something here',
object2: {
nestedObj1: {
something: 123,
arrInObj: ['hello', 123, 'cool'],
}
}
然后你就可以像这样访问这些东西:
console.log(req.body.object1)/“这里有些东西”
console.log(req.body.object2.nestedObj1[0])/“hello”
console.log(req.body.object2.nestedObj1.forEach(item=>console.log(item))/'hello'123'cool'
是的,我应该在req.body中接收到一些东西,但正如上面的输出所说,在我进入上传函数之前,我不会在req.body中接收到任何东西,这是在multer上传文件之后访问的。我在express设置中有“server.use(bodyParser.json())”和“server.use(bodyParser.urlcoded({extended:true}))。不过,我发现如果我使用.any()我可以访问字段和文件,而不是.array('photo')。但问题是,它首先上载这些文件,然后让我可以访问位于控制台.log(“req.body4:”)底部的uploads函数中的那些字段是的。所以问题仍然是在我需要使用这些字段进行验证之前先上传文件。你找到解决方案了吗?或者multer的其他替代方案这非常重要。