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Im測試Express的例子,但是我遇到了這個問題。使用node.js上傳圖片時出錯 - Express
我想執行這個代碼示例(從網上取得的例子),當我嘗試上傳圖像時出現此錯誤。
TypeError: Cannot read property 'file' of undefined
服務器
var express = require('express');
var app = express();
var fs = require("fs");
var bodyParser = require('body-parser');
var multer = require('multer');
app.use(express.static('public'));
app.use(bodyParser.urlencoded({ extended: false }));
var multer = require('multer');
app.get('/index.html', function (req, res) {
res.sendFile(__dirname + "/" + "index.html");
})
app.post('/file_upload', function (req, res) {
console.log(req.files.file.name);
console.log(req.files.file.path);
console.log(req.files.file.type);
var file = __dirname + "/" + req.files.file.name;
fs.readFile(req.files.file.path, function (err, data) {
fs.writeFile(file, data, function (err) {
if(err){
console.log(err);
}else{
response = {
message:'File uploaded successfully',
filename:req.files.file.name
};
}
console.log(response);
res.end(JSON.stringify(response));
});
});
})
var server = app.listen(8081, function() {
var host = server.address().address
var port = server.address().port
console.log("Example app listening at http://%s:%s", host, port)
})
CLIENT
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload: <br />
<form action = "http://127.0.0.1:8081/file_upload" method = "POST"
enctype = "multipart/form-data">
<input type="file" name="file" size="50" />
<br />
<input type = "submit" value = "Upload File" />
</form>
</body>
</html>
這幾乎可以肯定這一行:'var文件= __dirname + 「/」 + req.files.file。名稱;'確保'req.files.file'是正確的。 –
你說你是「測試例子」,但是說例子的來源是什麼? –