如何将发布数据从NodeMCU获取到Node.js服务器

Question

我正在尝试将数据从我的NodeMCU获取到Node.js服务器，但是它不起作用。但是，它与WAMP中的PHP服务器一起工作时，我在做什么错了？

我的Node.js代码：

const server = http.createServer((request, res) => {
    res.statusCode = 200;
    res.setHeader('Content-Type', 'text/plain');
    console.log('Got a request!');
    res.end('I am working fine ok');
    if (request.method === 'POST') {
        console.log('Got post data');
        var body = '';
        request.on('data', function (data) {
            console.log(data);       
            body += data;
            // Too much POST data, kill the connection!
            // 1e6 === 1 * Math.pow(10, 6) === 1 * 1000000 ~~~ 1MB
            if (body.length > 1e6)
                request.connection.destroy();
        });
    }

});

Arduino代码：

void postdata(String text) {
  String postData = "msg=" + text;
  //String url = "http://" + ip + "/post";
  String url = "http://192.168.1.2/";
  http.begin(url);
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  Serial.println("Sending Data :-  " + text);
  int httpCode = http.POST(postData);
  //String payload = http.getString();
//  Serial.println("httpCode: " + httpCode);
  //Serial.println("payload: " +payload);
  http.end();
}

循环

void loop() {
  server.handleClient();
  postdata("ping");
  delay(3000);
  //  String value = String(analogRead(0));
}

不是必需的PHP，但是它可以与PHP“ wampserver文本日志”一起使用？ PHP代码。

<?php
$handle = fopen("log.txt", "a");
foreach($_POST as $variable => $value) {
fwrite($handle, $variable);
fwrite($handle, "=");
fwrite($handle, $value);
fwrite($handle, "\r\n");
}
fwrite($handle, "\r\n");
fclose($handle);
echo 'ok';
exit;

我得到了这样的日志（log.txt）

msg=ping

msg=ping

重复