Question

我是Html编码的新手，我的目标是在单击按钮时发送测量值（在这种情况下为pH）。我不断收到错误消息，无法解析JSON字符串。我相当确定它与var ItemJSON及其表示方式有关。尝试过不同的方法，但希望有人可以指出正确的方向。预先感谢。

   <script type="text/javascript" language="javascript">

function send()
{

    var ItemJSON;

    ItemJSON = '[  {"c8y_ph":{"ph":{"value":11,"unit":"na"}},"time":"2020-06-30T12:46:14.000+02:00","source":{"id":"681700"},"type":"c8y_ph"} ]';

    URL = "https://myurl.com/measurement/measurements" ;  //Your URL

    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = callbackFunction(xmlhttp);
    xmlhttp.open("POST", URL, false);
    xmlhttp.setRequestHeader("Content-Type", "application/json");
    xmlhttp.setRequestHeader("Accept", "application/json");
    xmlhttp.setRequestHeader('Authorization', 'Basic ' + window.btoa('username:pw')); //in prod, you should encrypt user name and password and provide encrypted keys here instead 
    xmlhttp.onreadystatechange = callbackFunction(xmlhttp);
    xmlhttp.send(ItemJSON);
    alert(xmlhttp.responseText);
    document.getElementById("div").innerHTML = xmlhttp.statusText + ":" + xmlhttp.status + "<BR><textarea rows='100' cols='100'>" + xmlhttp.responseText + "</textarea>";
}

function callbackFunction(xmlhttp) 
{
    //alert(xmlhttp.responseXML);
}
</script>


<html>
<body id='bod'><button type="submit" onclick="javascript:send()">call</button>
<div id='div'>

</div></body>
</html>

如何在HTML代码中正确格式化JSON

0 个答案: