/usr/share/linkchecker/lconline/check.js is in linkchecker-web 9.3-1+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | // check url validity
function isValid (thisForm) {
if (thisForm.url.value=="" || thisForm.url.value=="http://") {
alert(gettext("Empty URL was given."));
thisForm.url.select();
thisForm.url.focus();
return false;
}
if (!checkSyntax(thisForm.url.value)) {
alert(gettext("Invalid URL was given."));
thisForm.url.select();
thisForm.url.focus();
return false;
}
return true;
}
// check url syntax
function checkSyntax (url) {
var syntax = /^https?:\/\/[-_a-zA-Z0-9.\/=%?~]+$/;
return syntax.test(url);
}
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