Variables 如何从GM_xmlhttprequest返回值？

我这里有这个代码：

var infiltrationResult;

while(thisOption) {
    var trNode = document.createElement('tr');
    var tdNode = document.createElement('td');
    var hrefNode = document.createElement('a');

    infPlanetID = thisOption.getAttribute('value');

  var myURL = "http://www.hyperiums.com/servlet/Planetinf?securitylevel=90&newinfiltr=New+infiltration&planetid=" + PlanetID + "&infplanetid=" + infPlanetID;

    GM_xmlhttpRequest({
        method: 'GET',
        url: myURL,
        headers: {
            'User-agent': 'Mozilla/4.0 (compatible) Greasemonkey',
            'Accept': 'application/atom+xml,application/xml,text/xml',
        },
        onload: function(responseDetails) {
                if (responseDetails.responseText.match(/<b>Invalid order<\/td><\/tr><tr><td><BR><center><font color=#AAAA77 face=verdana,arial size=2>The target planet is blocking all infiltrations[\s\S]<BR><BR>/im)) {
                    // Successful match
                    infiltrationResult = 'Invalid Order';
                } else {
                    // Match attempt failed
                    infiltrationResult = 'Infiltration Successfully Created';
                }
        }
    });

---

知道我做错了什么吗？

请求异步运行。这就是为什么函数首先采用

onload

回调函数的原因。如果是同步的，

GM_xmlhttpRequest

将像普通函数一样简单地返回响应细节

在等待请求返回时，调用

GM_xmlhttpRequest

后的代码继续运行。您的脚本正确地识别出，

infiltrationResult

未定义，因为请求尚未完成

如果您需要在请求返回时不仅仅分配变量，那么请在

onload

回调中执行此操作。

尝试以下操作：

var infiltrationResult;

while(thisOption) {
    var trNode = document.createElement('tr');
    var tdNode = document.createElement('td');
    var hrefNode = document.createElement('a');

    infPlanetID = thisOption.getAttribute('value');

  var myURL = "http://www.hyperiums.com/servlet/Planetinf?securitylevel=90&newinfiltr=New+infiltration&planetid=" + PlanetID + "&infplanetid=" + infPlanetID;

    GM_xmlhttpRequest({
        method: 'GET',
        url: myURL,
        headers: {
            'User-agent': 'Mozilla/4.0 (compatible) Greasemonkey',
            'Accept': 'application/atom+xml,application/xml,text/xml',
        },
        onload: function(responseDetails) {
                        if (responseDetails.responseText.match(/<b>Invalid order<\/td><\/tr><tr><td><BR><center><font color=#AAAA77 face=verdana,arial size=2>The target planet is blocking all infiltrations[\s\S]<BR><BR>/im)) {
                                // Successful match
                                infiltrationResult = 'Invalid Order';
                        } else {
                                // Match attempt failed
                                infiltrationResult = 'Infiltration Successfully Created';
                        }
                        sentback(infiltrationResult);//Sent it when it loads only
        }
    });

function sentback(x){
    alert(x);
}

var渗透结果；
while（此选项）{
var trNode=document.createElement（'tr'）；
var tdNode=document.createElement（'td'）；
var hrefNode=document.createElement（'a'）；
infPlanetID=thispoption.getAttribute（'value'）；
var myURL=”http://www.hyperiums.com/servlet/Planetinf?securitylevel=90&newinfiltr=New+渗透&planetid=“+planetid+”&infplanetid=“+infplanetid；
GMxmlHttpRequest({
方法：“GET”，
url:myURL，
标题：{
“用户代理”：“Mozilla/4.0（兼容）Greasemonkey”，
“接受”：“application/atom+xml，application/xml，text/xml”，
},
onload：函数（responseDetails）{
if（responseDetails.responseText.match（/Invalid order
目标行星正在阻止所有渗透[\s\s]

/im））{
//成功的比赛
渗透结果='无效顺序'；
}否则{
//匹配尝试失败
渗透结果='渗透成功创建'；
}
sentback（渗透结果）；//仅在加载时发送
}
});
函数sentback（x）{
警报（x）；
}

你说得绝对正确。将与该结果有关的代码移到函数中修复了所有问题。谢谢！G-Man

var infiltrationResult;

while(thisOption) {
    var trNode = document.createElement('tr');
    var tdNode = document.createElement('td');
    var hrefNode = document.createElement('a');

    infPlanetID = thisOption.getAttribute('value');

  var myURL = "http://www.hyperiums.com/servlet/Planetinf?securitylevel=90&newinfiltr=New+infiltration&planetid=" + PlanetID + "&infplanetid=" + infPlanetID;

    GM_xmlhttpRequest({
        method: 'GET',
        url: myURL,
        headers: {
            'User-agent': 'Mozilla/4.0 (compatible) Greasemonkey',
            'Accept': 'application/atom+xml,application/xml,text/xml',
        },
        onload: function(responseDetails) {
                        if (responseDetails.responseText.match(/<b>Invalid order<\/td><\/tr><tr><td><BR><center><font color=#AAAA77 face=verdana,arial size=2>The target planet is blocking all infiltrations[\s\S]<BR><BR>/im)) {
                                // Successful match
                                infiltrationResult = 'Invalid Order';
                        } else {
                                // Match attempt failed
                                infiltrationResult = 'Infiltration Successfully Created';
                        }
                        sentback(infiltrationResult);//Sent it when it loads only
        }
    });

function sentback(x){
    alert(x);
}