我有一台运行Node.js的服务器。我必须从html页面读取表单数据(" index.html")并将该数据写入txt文件。
这是我的index.html:
<form action="/uploads" method="post">
<table>
<tr>
<td><img src="images/ktulogo.png" width="100" height="100"></td>
<td>
<h3>Karadeniz Teknik Üniversitesi Bilgisayar Mühendisliği Bölümü</h3>
</td>
</tr>
<tr>
<td><br></td>
<td>
<hr>
</td>
</tr>
<tr>
<td>
<h4>Adınız Soyadınız :</h4>
</td>
<td><input type="text" style="margin-left: 5%; width: 40%"></td>
</tr>
<tr>
<td>
<h4>Öğrenci Numaranız :</h4>
</td>
<td><input name="ogrNo" type="text" style="margin-left: 5%; width: 40%"></td>
</tr>
<tr>
<td>
<h4>Cevabınız :</h4>
</td>
<td><textarea name="answer" datatype="text" rows="10" cols="100" style="margin-left: 5%; resize: none"></textarea></td>
</tr>
</table>
</br>
<center>
<button id="saveFile" class="btn btn-success" style="width: 30%">Sisteme Yükle</button>
</center>
</form>
这是我的app.js:
var express = require('express');
var app = express();
var path = require('path');
var fs = require('fs');
app.use(express.static(path.join(__dirname, 'public')));
app.get('/', function(req, res){
res.sendFile(path.join(__dirname, 'views/index.html'));
});
app.post('/uploads', function (req, res) {
var file_name = req.body.ogrNo;
var file_content = req.body.answer;
file_content = file_content.replace(/\n/g, "\r\n");
var stream = fs.createWriteStream(file_name+".txt");
stream.once('open', function () {
stream.write(file_content);
stream.end();
});
});
var server = app.listen(3000, function(){
console.log('Server listening on port 3000');
});
当我运行它时,它会抛出一个错误:
TypeError:无法读取属性&#39; ogrNo&#39;未定义的 在c:\ Users \ Volkan \ IdeaProjects \ File Upload \ app.js:13:27 在Layer.handle [as handle_request](c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ layer.js:95:5) 在下一个(c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ route.js:131:13) 在Route.dispatch(c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ route.js:112:3) 在Layer.handle [as handle_request](c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ layer.js:95:5) 在c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ index.js:277:22 在Function.process_params(c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ index.js:330:12) 在下一个(c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ index.js:271:10) 在serveStatic(c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ serve-static \ index.js:75:16) 在Layer.handle [as handle_request](c:\ Users \ Volkan \ IdeaProjects \ File Upload \ node_modules \ express \ lib \ router \ layer.js:95:5)
那么,问题的原因是什么或我如何处理这项工作?
答案 0 :(得分:2)
您必须解析传入的数据,为此目的使用body-parser
首先安装
npm i -S body-parser
然后将其导入您的代码
var bodyParser = require('body-parser')
添加解析器
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: true }));
// parse application/json
app.use(bodyParser.json());
这就是全部。