我正在使用Alamofire将多部分数据发送到我的Nodejs和Express API。我正在使用Multer上传图像文件和一些文本参数。出于某种原因，我可以上传图片文件，但我无法发送文字，例如＆＃34; title＆＃34;，＆＃34; price＆＃34;和＆＃34; description＆＃34; - 当我尝试从Swift应用程序上传时，这可能是我继续收到500错误代码的原因。我不确定是什么问题。我究竟做错了什么？这是我的快车路线：
var multer = require('multer');
var upload = multer({ dest: 'public/uploads/'})
var app = express();
app.use(function(err, req, res, next) {
console.log(err);
next(err);
});
var server = app.listen(3000, () => {
console.log('listening on *:3000');
});
app.get('/', (req, res) => {
res.sendFile(__dirname + '/index.html');
});
// get request params
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
// log to console
app.use(morgan('dev'));
app.use(express.static('public'));
// use passport package in app
app.use(passport.initialize());
app.use(passport.session());
app.use(multer({dest:'./uploads/'}).single('images'));
/*
app.get('/', function(req, res) {
res.send('Hello! Welcome to the land of dragons!');
})
*/
// pass passport for config
require('./config/passport')(passport);
// create new product
app.post('/newproduct', upload.single('images'), function (req, res) {
if (req.body.title == '' || req.body.price == '') {
res.json({success: false, msg: 'Please add title and price.'});
console.log('title: ' + req.body.title);
console.log('price: ' + req.body.price);
} else {
var newProduct = new Product({
title: req.body.title,
price: req.body.price,
description: req.body.description,
images: req.file
});
console.log(req.body);
console.log(req.file);
// save the new product
newProduct.save(function(err) {
if (err) {
res.json({success: false, msg: 'Listing was unsuccessful.'});
} else {
res.json({success: true, msg: 'Successful creating a new product!'});
console.log(newProduct.createdAt);
console.log(newProduct.updatedAt);
}
});
}
});
当我尝试在Postman中发出POST请求时，它会给我错误信息＆＃34;列表不成功。＆＃34;因为保存对象需要标题和价格。
这就是我在终端中得到的结果：
{}
{ fieldname: 'images',
originalname: 'Screen Shot 2016-07-27 at 2.48.14 PM.png',
encoding: '7bit',
mimetype: 'image/png',
destination: './uploads/',
filename: 'b3247d2b48591c1d6e47f5413647979b',
path: 'uploads/b3247d2b48591c1d6e47f5413647979b',
size: 285034 }
POST /newproduct 200 14.081 ms - 51
当我尝试在iOS模拟器中发出POST请求时，我收到此错误：
Error Domain=com.alamofire.error Code=-6003
"Response status code was unacceptable: 500"
UserInfo={StatusCode=500, NSLocalizedFailureReason=Response status code was unacceptable: 500}
我读到500错误代码很可能是服务器端问题，但只是为了确定 - 这是我的Swift代码：
let url = "http://localhost:3000/newproduct"
Alamofire.upload(.POST, url, multipartFormData: { multipartFormData in
let image: UIImage = self.productImage.image!
if let imageData = UIImagePNGRepresentation(image) {
multipartFormData.appendBodyPart(data: imageData, name: "file", fileName: "fileName.png", mimeType: "image/png")
multipartFormData.appendBodyPart(data: self.titleLabel.text!.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"title")
multipartFormData.appendBodyPart(data: self.descriptionLabel.text!.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"description")
multipartFormData.appendBodyPart(data: self.priceLabel.text!.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name :"price")
}
}, encodingCompletion: { encodingResult in
switch encodingResult {
case .Success(let upload, _, _):
upload.validate()
upload.responseJSON { response in
switch response.result {
case .Success:
print("success")
case .Failure(let error):
print(error)
}
}
case .Failure(let encodingError):
print(encodingError)
}
})
我也提到了这篇文章on Stackoverflow。
如果您需要更多详情，请告诉我们。我的API是一个大文件，因此我不想上传所有内容。