使用node.js上传文件，获取多个文件
使用node.js上传文件，获取多个文件
提问于 2015-09-26 07:38:25
为了用node.js上传单个文件，我有以下代码，使用express和multer：
var express = require("express");
var app = express();
var fs = require("fs");
var multer = require('multer');
var upload = multer({ dest: 'uploads/' });
// Process upload file
app.post('/file_upload', upload.single('single-file'), function(request, response) {
var fileName = request.file.originalname;
var filePath = request.file.path;
var file = __dirname + "/uploads/" + fileName;
fs.readFile(filePath, function(err, data) {
fs.writeFile(file, data, function(err) {
if (err) {
console.log(err);
} else {
responseData = {
'message' : 'File uploaded successfully',
'fileName' : fileName
};
}
response.end(JSON.stringify(responseData));
})
});
});以下是HTML文件：
<!DOCTYPE html>
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload: <br />
<form action="http://localhost:8081/file_upload" method="POST"
enctype="multipart/form-data">
<input type="file" name="single-file" size="50" />
<br />
<input type="submit" value="Upload File" />
</form>
</body>
</html>在运行代码之后，我能够上传文件。但问题是，每次我都会把两个文件上传到我的“上传”文件夹中。一个文件具有原始名称，另一个文件名奇怪，比如2787ab2db292d90bd2da83a6a6ce1700。
这正常吗？上传时如何处理其他文件？
回答 1
Stack Overflow用户
回答已采纳
发布于 2015-09-26 08:52:41
问题是，您正在从已经上传的文件中创建新文件。
因此，解决方案是用临时名称将上传的文件重命名为原始名称：
var express = require("express");
var app = express();
var fs = require("fs");
var multer = require('multer');
var uploadsFolder = __dirname + '/uploads/'; // defining real upload path
var upload = multer({ dest: uploadsFolder }); // setting path for multer
// Process upload file
app.post('/file_upload', upload.single('single-file'), function(request, response) {
var fileName = request.file.originalname; // original file name
var file = request.file.path; // real file path with temporary name
// renaming real file to it's original name
fs.rename(file, uploadsFolder + fileName, function (err) {
if (err) {
console.log(err);
response.json({success:false, message: err});
return;
}
response.json({success:true, message: 'File uploaded successfully', fileName: fileName});
});
});或让穆特上传到临时文件夹，然后复制或移动到上载文件夹：
额外安装fs：
npm install --save fs.extra和
var express = require("express");
var app = express();
var fs = require('fs.extra'); // extra functionality
var multer = require('multer');
var uploadsFolder = __dirname + '/uploads/'; // defining real upload path
var tempFolder = __dirname + '/tmp/'; // folder for temporary files, must exist
var upload = multer({ dest: tempFolder }); // setting path for multer
// Process upload file
app.post('/file_upload', upload.single('single-file'), function(request, response) {
var fileName = request.file.originalname; // original file name
var file = request.file.path; // real file path with temporary name
// renaming real file to it's original name
fs.move(file, uploadsFolder + fileName, function (err) {
if (err) {
console.log(err);
response.json({success:false, message: err});
return;
}
response.json({success:true, message: 'File uploaded successfully', fileName: fileName});
});
});页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/32794817
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