node.js 使用multer上传多个文件，但来自不同的领域？
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Uploading multiple files with multer, but from different fields?
提问by Andre M
How can I have multer accept files from multiple file type fields?
如何让multer接受来自多个文件类型字段的文件？
I have the following code that uploads a single file, using multer in node.js:
我有以下代码上传单个文件，在 node.js 中使用multer：
var storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, './public/uploads');
},
filename: function (req, file, callback) {
callback(null, file.fieldname + '-' + Date.now());
}
});
var upload = multer({ storage : storage });
app.post('/rest/upload', upload.array('video', 1), function(req, res, next){
...
}
From the following form, on the condition only the video field has a value (if I specify both I get an 'Unexpected field' error):
从以下表单中，只有视频字段具有值（如果我同时指定两者，则会出现“意外字段”错误）：
<form action="/rest/upload" method="post" enctype="multipart/form-data">
<label>Video file: </label> <input type="file" name="video"/>
<label>Subtitles file: </label> <input type="file" name="subtitles"/>
<input type="submit"/>
</form>
It is not clear from the documentation how to approach this? Any suggestions would be appreciated. BTW I have tried the following parameter variations, without success:
从文档中不清楚如何解决这个问题？任何建议，将不胜感激。顺便说一句，我尝试了以下参数变化，但没有成功：
app.post('/rest/upload', [upload.array('video', 1), upload.array('subtitles', 1)] ...
app.post('/rest/upload', upload.array('video', 1), upload.array('subtitles', 1), ...
app.post('/rest/upload', upload.array(['video', 'subtitles'], 1), ...
回答by mscdex
What you want is upload.fields():
你想要的是upload.fields()：
app.post('/rest/upload',
upload.fields([{
name: 'video', maxCount: 1
}, {
name: 'subtitles', maxCount: 1
}]), function(req, res, next){
// ...
}
回答by Andre M
Using Multer Upload Files From Two Fields of Separate Forms on Different Pages In this example I have two fields - resume and image. Resume in one form and Image in other. Both are on separate pages. First import dependencies
在不同页面上使用来自不同表单的两个字段的 Multer 上传文件 在这个例子中，我有两个字段 - 简历和图像。一种形式的简历和另一种形式的图像。两者都在不同的页面上。首先导入依赖
const path = require('path'); // for getting file extension
const multer = require('multer'); // for uploading files
const uuidv4 = require('uuidv4'); // for naming files with random characters
Define fileStorage and fileFilter:
定义 fileStorage 和 fileFilter：
const fileStorage = multer.diskStorage({
destination: (req, file, cb) => { // setting destination of uploading files
if (file.fieldname === "resume") { // if uploading resume
cb(null, 'resumes');
} else { // else uploading image
cb(null, 'images');
}
},
filename: (req, file, cb) => { // naming file
cb(null, file.fieldname+"-"+uuidv4()+path.extname(file.originalname));
}
});
const fileFilter = (req, file, cb) => {
if (file.fieldname === "resume") { // if uploading resume
if (
file.mimetype === 'application/pdf' ||
file.mimetype === 'application/msword' ||
file.mimetype === 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
) { // check file type to be pdf, doc, or docx
cb(null, true);
} else {
cb(null, false); // else fails
}
} else { // else uploading image
if (
file.mimetype === 'image/png' ||
file.mimetype === 'image/jpg' ||
file.mimetype === 'image/jpeg'
) { // check file type to be png, jpeg, or jpg
cb(null, true);
} else {
cb(null, false); // else fails
}
}
};
Middleware for multer
multer的中间件
app.use(
multer(
{
storage: fileStorage,
limits:
{
fileSize:'2mb'
},
fileFilter: fileFilter
}
).fields(
[
{
name: 'resume',
maxCount: 1
},
{
name: 'image',
maxCount: 1
}
]
)
);
And then call your routes. You may need to add csrf protection or authentication along with this for security. But this should work fine.
然后调用你的路由。为了安全起见，您可能需要添加 csrf 保护或身份验证。但这应该可以正常工作。
回答by Roman Dibikhin
Did you try to use multer().any()?
您是否尝试使用multer().any()？
