通过ajax发送图像到multer
[我正在使用Multer将图像文件上传到我的节点服务器,并且总是会因为使用ajax发送图像而给我未定义的含义。
Ajax:
image = $("#input-file-img").val()
const data = new FormData();
data.append("image", image);
$.ajax({
url: '/uploadfile/' + userName,
method: 'POST',
async: false,
processData: false ,
contentType: false,
data: data
})
Upload.js
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'uploads')
},
filename: function (req, file, cb) {
cb(null, file.originalname)
}
})
var upload = multer({ storage: storage })
router.post('/uploadfile/:userName', upload.single('image'), async (req, res, next) => {
let user = await User.findOne({ userName: req.params.userName })
let file = req.file
let fileName = file.filename
let path = variables.kepler + 'uploads/' + fileName
user.image = path
await user.save()
if (!path) {
const error = new Error('Please upload a file ...')
error.httpStatusCode = 400
return next(error)
}
if (path) {
return res.status(200).send({
status: '200',
message: 'Operation completed successfully ...',
data: user,
path
})
}
})
[我用控制台检查了图像值,它显示了C:\ fakepath \ Capture d'écrande 2019-09-19 11-33-59.png'
非常感谢您的帮助。
回答如下:[我认为您的服务器端代码很好,如果我按如下所示修改客户端代码,一切正常,我们最终在/ uploads文件夹中找到图像:
function base64toBlob(base64, mimeType) {
const bytes = atob(base64.split(',')[1]);
const arrayBuffer = new ArrayBuffer(bytes.length);
const uintArray = new Uint8Array(arrayBuffer);
for (let i = 0; i < bytes.length; i++) {
uintArray[i] = bytes.charCodeAt(i);
}
return new Blob([ arrayBuffer ], { type: mimeType });
}
function submitForm() {
const imgRegEx = /^data:(image\/(gif|png|jpg|jpeg))/;
const imageData = $('#input-file-img').attr('src');
const mimeType = imgRegEx.exec(imageData)[1];
const blob = base64toBlob(imageData, mimeType);
const fileExt = mimeType.replace("image/", "");
const fileName = "test-image." + fileExt; // Change as appropriate..
const data = new FormData();
data.append("image", blob, fileName);
$.ajax({
url: '/uploadfile/' + userName,
method: 'POST',
async: false,
processData: false ,
contentType: false,
data: data
})
}
通过ajax发送图像到multer
[我正在使用Multer将图像文件上传到我的节点服务器,并且总是会因为使用ajax发送图像而给我未定义的含义。
Ajax:
image = $("#input-file-img").val()
const data = new FormData();
data.append("image", image);
$.ajax({
url: '/uploadfile/' + userName,
method: 'POST',
async: false,
processData: false ,
contentType: false,
data: data
})
Upload.js
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'uploads')
},
filename: function (req, file, cb) {
cb(null, file.originalname)
}
})
var upload = multer({ storage: storage })
router.post('/uploadfile/:userName', upload.single('image'), async (req, res, next) => {
let user = await User.findOne({ userName: req.params.userName })
let file = req.file
let fileName = file.filename
let path = variables.kepler + 'uploads/' + fileName
user.image = path
await user.save()
if (!path) {
const error = new Error('Please upload a file ...')
error.httpStatusCode = 400
return next(error)
}
if (path) {
return res.status(200).send({
status: '200',
message: 'Operation completed successfully ...',
data: user,
path
})
}
})
[我用控制台检查了图像值,它显示了C:\ fakepath \ Capture d'écrande 2019-09-19 11-33-59.png'
非常感谢您的帮助。
回答如下:[我认为您的服务器端代码很好,如果我按如下所示修改客户端代码,一切正常,我们最终在/ uploads文件夹中找到图像:
function base64toBlob(base64, mimeType) {
const bytes = atob(base64.split(',')[1]);
const arrayBuffer = new ArrayBuffer(bytes.length);
const uintArray = new Uint8Array(arrayBuffer);
for (let i = 0; i < bytes.length; i++) {
uintArray[i] = bytes.charCodeAt(i);
}
return new Blob([ arrayBuffer ], { type: mimeType });
}
function submitForm() {
const imgRegEx = /^data:(image\/(gif|png|jpg|jpeg))/;
const imageData = $('#input-file-img').attr('src');
const mimeType = imgRegEx.exec(imageData)[1];
const blob = base64toBlob(imageData, mimeType);
const fileExt = mimeType.replace("image/", "");
const fileName = "test-image." + fileExt; // Change as appropriate..
const data = new FormData();
data.append("image", blob, fileName);
$.ajax({
url: '/uploadfile/' + userName,
method: 'POST',
async: false,
processData: false ,
contentType: false,
data: data
})
}