我正在嘗試使用XPath,基本上我試圖使用XMLHttpRequest加載一個HTML頁面,並從它的XPath中選擇一個元素。Javascript/XPath錯誤
這裏是我的代碼(Greasemonkey的/ JS):
GM_xmlhttpRequest({
method: 'GET',
url: url,
headers: {
'User-agent': 'Mozilla/4.0 (compatible) Greasemonkey',
'Accept': 'application/atom+xml,application/xml,text/xml',
},
onload: function(responseDetails)
{
var rs = document.evaluate("/html/body/div",responseDetails.responseText,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
var n = rs.snapshotItem(0);
alert(n.innerHTML);
}});
但它無法正常工作。
這是我得到的錯誤:
uncaught exception: [Exception... "Could not convert JavaScript argument arg 1
[nsIDOMXPathEvaluator.evaluate]" nsresult: "0x80570009 (NS_ERROR_XPC_BAD_CONVERT_JS)"
location: "JS frame :: file:///C:/Documents%20and%20Settings/Admin/Application%20Data
/Mozilla/Firefox/Profiles/mq3w8kw4.default/extensions/%7Be4a8a97b-f2ed-450b-
b12d-ee082ba24781%7D/components/greasemonkey.js :: anonymous :: line 587" data: no]
「它不工作」是不是非常有用的消息。你得到的結果是什麼?錯誤消息? XMLHttpRequest是否失敗? 'onload'從不叫? – 2010-08-02 17:32:04
對不起,我的壞。這是我得到的錯誤: 未捕獲的異常:[Exception ...「無法轉換JavaScript參數arg 1 [nsIDOMXPathEvaluator.evaluate]」nsresult:「0x80570009(NS_ERROR_XPC_BAD_CONVERT_JS)」location:「JS frame :: file: ///C:/Documents%20and%20Settings/Admin/Application%20Data/Mozilla/Firefox/Profiles/mq3w8kw4.default/extensions/%7Be4a8a97b-f2ed-450b-b12d-ee082ba24781%7D/components/greasemonkey.js :: anonymous:line 587「data:no] – 2010-08-02 17:40:49
當添加到帖子時,請修改帖子並在其中添加額外的信息,而不是添加評論。這一次我照顧了你 – 2010-08-02 18:00:13