/** HTML escape */
function escapeHtml(unsafe) {
return unsafe
.replace(/&/g, "&")
.replace(//g, ">")
.replace(/"/g, """)
.replace(/'/g, "'");
}
/** Escape URL chars that could throw off the meta redirect tag */
function sanitizeUrl(unsafe) {
return unsafe
.replace(/;/g, "%3B");
}
/** Remove the most risky characters from a filename string */
function cleanFilename(unsafe) {
return unsafe
.replace(/[/\\?*|"'<>:]+/g, " ")
.replace(/\s+/g, " ");
}
browser.browserAction.onClicked.addListener((tab) => {
const escapedUrl = escapeHtml(sanitizeUrl(tab.url));
const escapedTitle = escapeHtml(tab.title);
const filename = cleanFilename(tab.title);
const content = new Blob([
`
${escapedTitle}
Redirecting to: ${escapedUrl}
`]);
browser.downloads.download({
filename: `${filename}.link.html`,
url: URL.createObjectURL(content)
});
});