[英]Edit JSON file on local server
我正在開發要在本地服務器上托管的項目,我的目標是能夠編輯和保存一個JSON文件,該文件將存儲我的項目的配置。 我能夠讀取文件並使用axios請求對其進行訪問,但是我對如何通過前端編輯和保存文件感到有些困惑。
Server.JS文件
const fs = require('fs');
var userSettings = JSON.parse(fs.readFileSync('config.json'));
var express = require('express');
var app = express();
var server = app.listen(3000, listening);
function listening(){
console.log("listening ...")
}
app.use(express.static('public'))
app.get('/api/settings', getSettings);
function getSettings(req,res){
res.send(userSettings)
}
config.json
{
"CurrentOperation": {
"numberOfReadingsToBeAveraged": 30,
"totalNumberOfSensorRunsBeforeRunEnds": 236,
"waitTimeBetweenSensorReadingsInSeconds": 3342,
"nameOfDataFileOutput": "DataOutput"
},
"Mash": {
"numberOfReadingsToBeAveraged": 40,
"totalNumberOfSensorRunsBeforeRunEnds": 203,
"waitTimeBetweenSensorReadingsInSeconds": 382,
"nameOfDataFileOutput": "MashOutput"
},
"Boil": {
"numberOfReadingsToBeAveraged": 12,
"totalNumberOfSensorRunsBeforeRunEnds": 23,
"waitTimeBetweenSensorReadingsInSeconds": 32,
"nameOfDataFileOutput": "BoilOutput"
},
"Ferment": {
"numberOfReadingsToBeAveraged": 3,
"totalNumberOfSensorRunsBeforeRunEnds": 13,
"waitTimeBetweenSensorReadingsInSeconds": 32,
"nameOfDataFileOutput": "FermentOutput"
}
}
公共目錄中的index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Project</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" media="screen" href="main.css" />
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<ul>
<li v-for="(settings,key) in userSettings">
{{key}}:{{settings}}
</li>
</ul>
</div>
</body>
<script>
var app = new Vue({
el: '#app',
data (){
return{
userSettings:'',
}
},
mounted(){
axios
.get('api/settings')
.then(res=>(this.userSettings = res.data))
.catch(function (error) {
// handle error
console.log(error);
})
}
})
</script>
</html>
您將需要創建一個新端點來接受一個POST
請求,該請求將接受您的新配置並觸發服務器上文件的重寫。
app.post('/api/settings', postSettings);
function postSettings(req,res){
var fileContent = JSON.stringify(req.body.settings);
fs.writeFile('config.json', content, 'utf8', function (err) {
if (err) {
res.status(400).send({error: 'some error'})
} else {
res.send({message: 'success'})
}
});
}
一些注意事項:
上面的代碼假設前端將發送一個對象,該對象帶有一個名為settings
的字段,其中將包含您要寫入的文件的詳細信息。
您可能知道這一點,但是建議您將數據存儲在數據庫中,而不是允許前端在服務器上重寫文件
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