我想创建一个API以接收来自网络的上传文件。然后,我将对文件进行检查(以查看.png是否是真正的.png而不是.exe),然后将文件发送到另一个API。
但是现在我被困在接收文件部分。
我一直在google和stackoverflow中搜索,但是这两种方法都不起作用。
我在哪里托管我的API: Firebase函数
示例代码:
html代码:
<html>
<body>
<form ref='uploadForm'
id='uploadForm'
action='https://<project>.cloudfunctions.net/api/upload'
method='post'
encType="multipart/form-data">
<input type="file" name="sampleFile" />
<input type='submit' value='Upload!' />
</form>
</body>
</html>
NodeJS代码:
formidable
const functions = require('firebase-functions');
const express = require('express');
const app = express();
app.post('/upload', function (req, res) {
console.log('initializing upload')
var IncomingForm = require('formidable').IncomingForm
var form = new IncomingForm()
form.uploadDir = 'uploads'
form.parse(req, function (err, fields, files) {
if (err) {
console.log('some error', err)
res.status(400).send(err)
} else if (!files.file) {
console.log('no file received')
res.status(400).send('no file received')
} else {
var file = files.file
console.log('saved file to', file.path)
console.log('original name', file.name)
console.log('type', file.type)
console.log('size', file.size)
res.status(400).send(file.path, file.name, file.type, file.size)
}
})
});
exports.api = functions.https.onRequest(app)
connect-busboy
const functions = require('firebase-functions');
const express = require('express');
const app = express();
var fs = require('fs');
var busboy = require('connect-busboy');
//...
app.use(busboy());
//...
app.post('/upload', function(req, res) {
var fstream;
req.pipe(req.busboy);
req.busboy.on('file', function (fieldname, file, filename) {
console.log("Uploading: " + filename);
res.status('200').send('uploaded')
// fstream = fs.createWriteStream(__dirname + '/files/' + filename);
// file.pipe(fstream);
// fstream.on('close', function () {
// res.redirect('back');
// });
});
});
exports.api = functions.https.onRequest(app)
express-fileupload
const functions = require('firebase-functions');
const express = require('express');
const fileUpload = require('express-fileupload');
const app = express();
// default options
app.use(fileUpload());
app.post('/upload', function(req, res) {
console.log('upload initializing')
if (!req.files)
return res.status(400).send('No files were uploaded.');
// The name of the input field (i.e. "sampleFile") is used to retrieve the uploaded file
let sampleFile = req.files.sampleFile;
if(req.files){
console.log('File Uploaded')
res.status('200').send('File uploaded!');
}
});
exports.api = functions.https.onRequest(app)
multer
const functions = require('firebase-functions');
const express = require('express'); // call express
const app = express(); // define our app using express
const bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
const router = express.Router();
const multer = require('multer');
var storage = multer.memoryStorage()
var upload = multer({ storage: storage })
const readChunk = require('read-chunk');
const fileType = require('file-type');
var returnSuccess = {
resultCode: 1,
resultDesc: '',
resultData: '',
dataCount: 0,
resultAction: '',
timeStamp: Date.now()
}
var returnFailed = {
resultCode: -1,
resultDesc: '',
resultAction: '',
timeStamp: Date.now()
}
router.post('/fileChecker', upload.single('doc'), function (req, res, next) {
console.log('Initilize FileChecker')
var files = []
var checkResults = []
var file = req.file
files = req.files
console.log(file)
console.log(files)
if(file){
console.log('got the FILE!')
}
res.status(200).send('Processed Ntg')
});
app.use(router)
exports.api = functions.https.onRequest(app)
*附加说明:
1)对于multer,firebase托管似乎与dest选项不兼容。如果设置dest选项,将会出现部署错误。
2)所有代码在部署到Firebase托管后都经过测试,我没有在本地进行测试。
我不知道发生了什么问题。.请帮助..
答案 0 :(得分:0)
对不起,不是一个完整的答案,但太冗长了,无法评论。只是为了测试multer是否正常工作,请尝试使用通用的中间件并将其放在您的中间件链中(我在cors处理之后但在人体解析之前拥有我的):
onFileUploadStart(file / *,req,res * /){
console.log('multer.onFileUploadStart!',文件);
绝对可以捕获任何发送文件的东西。
编辑:我正在使用旧版本和不推荐使用的东西,看来...抱歉。
哪个又一次查看您的代码?您的CORS处理在哪里?您需要它来满足跨域,跨协议甚至跨端口的浏览器请求。
在此处https://enable-cors.org/server_expressjs.html或尝试cors package。
答案 1 :(得分:0)
Multer:内存存储引擎将文件作为<li draggable="true">Tab</li>
...
$('.tabpane__tabs li').on('dragover', function(e) {
alert('test'); // Does not trigger
e.preventDefault();
});
$('.tabpane__tabs li').on('dragstart', function(e) {
e.originalEvent.dataTransfer.setData('text/html', $('.tabpane__panes > li').eq($(this).index()).html());
});
$('.tabpane__tabs li').on('drop', function(e) {
alert('test'); // Does not trigger
});
对象存储在内存中。它没有任何选择。
使用内存存储时,文件信息将包含一个名为Buffer
的字段,其中包含整个文件。
See docs
因为您正在执行内存上载。看看您是否真的要上传到内存或磁盘?