Question

我试图从带有javascript的web服务器获取json，但XMLHttoRequest返回0，尽管来自服务器的200 OK响应。以下是来自wireshark的网络跟踪和来自w3schools的javascript，可以从以下地址外部访问REST服务：

http://ogy.noip.me:5678/home

网络追踪：

GET /home HTTP/1.1
Host: 192.168.0.240:6666
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://www.w3schools.com/json/tryit.asp?filename=tryjson_http
Origin: http://www.w3schools.com
Connection: keep-alive

HTTP/1.1 200 OK
Content-Type: application/json
Server: HomefrogREST/0.1 HomeAutomation
Content-Length: 2037

{
    "/home/floor1/Bedroom2/Temperature":{
        "units":"C",
        "device-id":"4",
        "units_humanized":"Celsius",
        "rest.timestamp":"2016-06-24 19-47-07",
        "temperature":26.200001,
        "name":"ds1820digitemp"
    },
    "/home/floor1/LivingRoom/Temperature":{
        "units":"C",
        "device-id":"2",
        "units_humanized":"Celsius",
        "rest.timestamp":"2016-06-24 19-47-02",
        "temperature":24.100000,
        "name":"ds1820digitemp"
    },
    "/home/floor1/Garage/Temperature":{
        "units":"C",
        "device-id":"1",
        "units_humanized":"Celsius",
        "rest.timestamp":"2016-06-24 19-47-07",
        "temperature":20.799999,
        "name":"ds1820digitemp"
    },
    "/home/floor1/Bedroom1/Temperature":{
        "units":"C",
        "device-id":"3",
        "units_humanized":"Celsius",
        "rest.timestamp":"2016-06-24 19-47-07",
        "temperature":23.799999,
        "name":"ds1820digitemp"
    },
    "/home/floor1/LivingRoom/AllDevicesOff":{
        "/home/floor1/LivingRoom/Heater1":"no_name",
        "/home/floor1/LivingRoom/Heater2":"no_name",
        "name":"scenectl",
        "rest.timestamp":"2016-06-24 19-45-07"
    },
    "/home/floor1/LivingRoom/Heater1":{
        "device-id":2,
        "status":"on",
        "rest.timestamp":"2016-06-24 19-45-07",
        "name":"telldus"
    },
    "/home/floor1/StorageRoom/Temperature":{
        "units":"C",
        "device-id":"0",
        "units_humanized":"Celsius",
        "rest.timestamp":"2016-06-24 19-47-07",
        "temperature":24.100000,
        "name":"ds1820digitemp"
    },
    "/home/floor1/LivingRoom/Heater2":{
        "device-id":1,
        "status":"off",
        "rest.timestamp":"2016-06-24 19-45-07",
        "name":"telldus"
    }
}

java脚本：

<!DOCTYPE html>
<html>
<body>

<div id="id01"></div>

<script>
var xmlhttp = new XMLHttpRequest();
var url = "http://192.168.0.240:6666/home";

xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
        var myArr = JSON.parse(xmlhttp.responseText);
        myFunction(myArr);
    }
};
xmlhttp.open("GET", url, true);
xmlhttp.send();

function myFunction(arr) {

    document.getElementById("id01").innerHTML = arr;
}
</script>

</body>
</html>

请告诉我我的设置有什么问题？

XMLHttpRequest返回状态0作为响应

0 个答案: