抱歉缩进不佳 我是node.js新手,尝试将图像上传到node.js 检查了很多答案,如果我错了请纠正我
1.bodyParser需要一个中间件来处理二进制文件,例如IMAGE 如果我不使用它,它会显示
undefine token
2.使用Multer作为中间件,像这样
var multer = require('multer') var upload = multer({ dest:'/Node/file-upload/uploads/' }); app.post('/upload',upload.array(),songs.upload);
- 关注this ,req.files是图像文件,req.body是文件名 所以我使用 fs.readFile 来读取文件
fs.readFile(req.files.image.path, function (err, data)
4.比我需要文件路径和文件名,我使用req.body
var dirname = "/Node/file-upload/uploads/"; var newPath = dirname + req.body.image.filename;
5.然后将数据写入目的地
fs.writeFile(newPath, data, function (err)
我不确定我错过了哪一部分,我花了 10 个小时才完成此操作,请帮忙
它总是告诉我类型错误:无法读取未定义的属性“图像”
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',upload.array(),songs.upload);
路由.js
var mongoose = require('mongoose');
var uri = "mongodb://xxxxxx:xxxxxxx@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');
db.on('error', console.error.bind(console, 'connection errrrrrrrror:'));
db.once('open', function() {
console.log("mongodb is connected!!");
});
exports.upload = function(req, res) {
console.log(req.body);
fs.readFile(req.files.image.path, function (err, data){
var dirname = "/Node/file-upload/uploads/";
var newPath = dirname + req.body.image.filename;
fs.writeFile(newPath, data, function (err) {
if(err){
res.json({'response':"Error"});
}else {
res.json({'response':"Saved"});
}
});
});
};
错误
TypeError: Cannot read property 'image' of undefined
at exports.upload (c:\Users\awei\WebstormProjects\untitled\routes\girlshanlder.js:92:26)
at Layer.handle [as handle_request] (c:\Users\awei\node_modules\express\lib\router\layer.js:95:5)
at next (c:\Users\awei\node_modules\express\lib\router\route.js:131:13)
at multerMiddleware (c:\node_modules\multer\lib\make-middleware.js:18:41)
at Layer.handle [as handle_request] (c:\Users\awei\node_modules\express\lib\router\layer.js:95:5)
at next (c:\Users\awei\node_modules\express\lib\router\route.js:131:13)
at Route.dispatch (c:\Users\awei\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (c:\Users\awei\node_modules\express\lib\router\layer.js:95:5)
at c:\Users\awei\node_modules\express\lib\router\index.js:277:22
at Function.process_params (c:\Users\awei\node_modules\express\lib\router\index.js:330:12)
at next (c:\Users\awei\node_modules\express\lib\router\index.js:271:10)
at jsonParser (c:\Users\awei\node_modules\body-parser\lib\types\json.js:107:37)
at Layer.handle [as handle_request] (c:\Users\awei\node_modules\express\lib\router\layer.js:95:5)
at trim_prefix (c:\Users\awei\node_modules\express\lib\router\index.js:312:13)
at c:\Users\awei\node_modules\express\lib\router\index.js:280:7
at Function.process_params (c:\Users\awei\node_modules\express\lib\router\index.js:330:12)
最佳答案
app.js
中的 upload.array()
应该是
upload.array('image',1) // 1 here is number of files you would upload
在您的 songs.upload
中间件中,您将获得 req.files.image 作为数组,
因此,您最好检查数组的长度并迭代它以保存每个文件,或者如果您只想保存 1 个文件,您可以执行以下操作。
示例:
app.js
app.post('/upload',upload.array('image',1),songs.upload);
路由.js
var mongoose = require('mongoose');
var uri = "mongodb://xxxxxx:xxxxxxx@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');
db.on('error', console.error.bind(console, 'connection errrrrrrrror:'));
db.once('open', function() {
console.log("mongodb is connected!!");
});
exports.upload = function(req, res) {
console.log(req.body);
fs.readFile(req.files.image[0].path, function (err, data){
var dirname = "/Node/file-upload/uploads/";
var newPath = dirname + req.body.image.filename;
fs.writeFile(newPath, data, function (err) {
if(err){
res.json({'response':"Error"});
}else {
res.json({'response':"Saved"});
}
});
});
};
关于javascript - 将图像上传到未定义的 Node.js image',我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35628540/