Javascript 在流结束之前调用节点(express.js)next()
我有以下中间件功能Javascript 在流结束之前调用节点(express.js)next(),javascript,node.js,express,fs,Javascript,Node.js,Express,Fs,我有以下中间件功能 var bodyParser = require('body-parser'), fs = require('fs'); module.exports = function(req, res, next) { // Add paths to this array to allow binary uploads var pathsAllowingBinaryBody = [ '/api2/information/upload', '/api2/kpi
var bodyParser = require('body-parser'),
fs = require('fs');
module.exports = function(req, res, next) {
// Add paths to this array to allow binary uploads
var pathsAllowingBinaryBody = [
'/api2/information/upload',
'/api2/kpi/upload',
];
if (pathsAllowingBinaryBody.indexOf(req._parsedUrl.pathname) !== -1) {
var date = new Date();
req.filePath = "uploads/" + date.getTime() + "_" + date.getMilliseconds() + "_" + Math.floor(Math.random() * 1000000000) + "_" + parseInt(req.headers['content-length']);
var writeStream = fs.createWriteStream(req.filePath);
req.on('data', function(chunk) {
writeStream.write(chunk);
});
req.on('end', function() {
writeStream.end();
next();
});
} else {
bodyParser.json()(req, res, next);
}
};
文件正在正确传输,但在
req.on('end', function() {
writeStream.end();
next();
});
在将所有数据写入新文件之前调用
我的问题是我做错了什么?如何修复它?使用可写文件流的
close
事件了解文件描述符何时关闭
替换此项:
var writeStream = fs.createWriteStream(req.filePath);
req.on('data', function(chunk) {
writeStream.write(chunk);
});
req.on('end', function() {
writeStream.end();
next();
});
为此:
req.pipe(fs.createWriteStream(req.filePath)).on('close', next);
真 的。那很容易!非常感谢你!我已经更新了我的答案,从技术上讲,它应该是
close
事件,这是来自fs
模块的文件流使用的特殊事件。