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XMLHttpRequestを使ったときのエラー

Last updated at Posted at 2018-11-01

javascriptで現在のURLをもとにタイトルを取得しようとしたらエラーが出た。
その時のソースコードがこちら




var checkurl = location.href;

function getTitle(url,callback)
{
	var tit=new XMLHttpRequest()
	tit.onload = function()
	{
		var title=this.responseXML.title||"notitle"
		callback(url,title)
	}
	tit.open("GET", url, true);
	tit.responseType="document";
	tit.send();
}

getTitle(checkurl,consoleTitle)
function consoleTitle(url,title)
{
console.log(title);
};

これをhtmlファイルのscriptタグの中に記入しgooglechromeで開くとコンソールログのほうでエラーが出ていた。
内容はセキュリティエラーのようだったのでコマンドプロンプトから以下を実行した。
cd C:\Program Files (x86)\Google\Chrome\Application
chrome.exe -allow-file-access-from-files
これで(多分)解決した。
ーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーー
ps.実際のエラーコードを載せておきます

横書きver


pagelog.html:27 Access to XMLHttpRequest at 'file:///F:/%E5%8D%92%E6%96%B0%E3%83%91%E3%83%BC%E3%83%84/pagelog.html' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.

改行ver

pagelog.html:27 Access to XMLHttpRequest at 'file:///F:/%E5%8D%92%E6%96%B0%E3%83%91%E3%83%BC%E3%83%84/pagelog.html' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.

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