在 Google Chrome 中使用 javascript 加载本地 xml 文件
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Load local xml file using javascript in Google Chrome
提问by Cornel
I think until v5 of Google Chrome the below code worked. Now in the latest version I get the following error when opening my webpage locally:
我认为直到谷歌浏览器的 v5 下面的代码才有效。现在在最新版本中，在本地打开我的网页时出现以下错误：
"XMLHttpRequest cannot load file:///C:/Temp/Course.xml. Cross origin requests are only supported for HTTP."
“XMLHttpRequest 无法加载 file:///C:/Temp/Course.xml。只有 HTTP 支持跨源请求。”
The Javascript code:
Javascript代码：
function getXmlDocument(sFile) {
var xmlHttp, oXML;
// try to use the native XML parser
try {
xmlHttp = new XMLHttpRequest();
xmlHttp.open("GET", sFile, false); // Use syncronous communication
xmlHttp.send(null);
oXML = xmlHttp.responseXML;
} catch(e) {
// can't use the native parser, use the ActiveX instead
xmlHttp = getXMLObject();
xmlHttp.async = false; // Use syncronous communication
xmlHttp.resolveExternals = false;
xmlHttp.load(sFile);
oXML = xmlHttp;
}
// return the XML document object
return oXML;
}
// get the best ActiveX object that can read XML
function getXMLObject() {
// create an array with the XML ActiveX versions
var aVersions = new Array("Msxml2.DOMDocument.6.0", "Msxml2.DOMDocument.3.0");
// loop through the array until we can create an activeX control
for (var i=0; i<aVersions.length; i++) {
// return when we can create the activeX control
try {
var oXML = new ActiveXObject(aVersions[i]);
return oXML;
}
catch(e) {
}
}
// could not create an activeX, return a null
return null;
}
I really don't want to be forced to open the web page from a web server every time.
我真的不想每次都被迫从 Web 服务器打开网页。
回答by gregers
Local file access is disabled by default for security reasons. Try starting Google Chrome from the command line with the argument --allow-file-access
出于安全原因，默认情况下禁用本地文件访问。尝试使用参数--allow-file-access从命令行启动 Google Chrome
回答by rdmueller
It would be more secure if you just start a local webserver and fetch your html andxml from localhost.
如果您只是启动本地网络服务器并从本地主机获取 html和xml ，则会更安全。
You can easily avoid deploying of the files by just let the server serve the contents of a local folder in which you place your xml.
您可以轻松地避免部署文件，只需让服务器为您放置 xml 的本地文件夹的内容提供服务。
This way you avoid
这样你就可以避免
- having to start chrome in an unsecure mode
- having problems when you later deploy your app to a server on the internet
- 必须在不安全模式下启动 Chrome
- 稍后将应用程序部署到 Internet 上的服务器时遇到问题
server to go is an example for an easy to install webserver http://www.server2go-web.de/
server to go 是一个易于安装的网络服务器的例子http://www.server2go-web.de/
