我正在尝试将图片上传到node.js express
令牌取消定义
问题是,我从Postman上传了一张图片,我只写console.log(req.file)
它显示undefined
。
如果我尝试编写req.file.image.path
来获取文件路径,则错误为image undefined
,好像我没有使用multer,所以req.file
没有&# 39; t保存数据信息,我应该创建一些临时文件夹来进行修改或......?
app.js
var express = require('express')
,bodyParser = require('body-parser')
,app = express()
,multer = require('multer')
,binary = require('binary')
,fs = require('fs')
,util= require('util')
,http = require('http')
,multer = require('multer')
,upload = multer({ dest: '/Node/file-upload/uploads/' });
app.use(bodyParser.urlencoded({ extended: true })); // support encoded bodies.
app.use(bodyParser.json({limit: '5mb'}));
songs = require('./routes/route');
app.listen(3000, function () {
console.log('Example app listening on port 3000!');
});
app.post('/upload',songs.upload);
route.js
var mongoose = require('mongoose');
var uri = "mongodb://1111:1111@ds061365.mongolab.com:61365/aweitest";
mongoose.connect(uri);
// we're connected!
var db = mongoose.connection.db;
var BSON = require('bson').BSONPure;
var binary = require('binary');
var body = require('body-parser');
var fs = require('fs');
var multer = require('multer');
var storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, '/Node/file-upload/uploads/');
},
filename: function (req, file, callback) {
callback(null, file.fieldname + '-' + Date.now());
}
});
var upload = multer({ storage : storage}).single('image');
db.on('error', console.error.bind(console, 'connection errrrrrrrror:'));
db.once('open', function() {
console.log("mongodb is connected!!");
});
exports.upload = function(req, res) {
upload(req,res,function(err) {
console.log(req.file);
fs.readFile(req.file.image.path, function (err, data){
var dirname = "/Node/file-upload/uploads/";
var newPath = dirname + req.body.filename;
fs.writeFile(newPath, data, function (err) {
if(err) {
return res.end("Error uploading file.");
}
res.end("File is uploaded");
});
});
});
};
错误
TypeError: Cannot read property 'image' of undefined
at c:\Users\awei\WebstormProjects\untitled\routes\girlshanlder.js:107:28
答案 0 :(得分:2)
您需要在Postman中发送图像之前设置文件名,如图here
所示干杯。
答案 1 :(得分:0)
在MySQL数据库和文件夹中上传图像的完整代码。
只需定义模块并安装multer和路径并保存即可。
var multer = require('multer');
var path = require('path');
var storage = multer.diskStorage({
destination: function(req, file, callback) {
callback(null, './uploadimages')
},
filename: function(req, file, callback) {
callback(null, file.fieldname + '-' + Date.now() + path.extname(file.originalname))
}
})
app.post('/imginsert',multer({
storage: storage,
fileFilter: function(req, file, callback) {
var ext = path.extname(file.originalname)
if (ext !== '.png' && ext !== '.jpg' && ext !== '.gif' && ext !== '.jpeg')
{
return callback(res.end('Only images are allowed'), null)
}
callback(null, true)
}
}).single('img'), function(req, res) {
/*img is the name that you define in the html input type="file" name="img" */
var data = {
table_column_name(your database table column field name) :req.file
};
var query = connection.query("Insert into tablename set ?" ,data,function(err, rows)
{
if (err)
throw err;
res.redirect('/blog');
});
console.log(query.sql);
console.log(req.file);
});