const userIP = document.getElementById("fileUrl");
const dBtn = document.getElementById("downloadBtn");
const errMsg = document.getElementById("error-message");
dBtn.addEventListener("click", (e) => {
e.preventDefault();
dBtn.innerText = "Downloading file...";
downFn(userIP.value);
});
function downFn(url) {
const pattern = /^(ftp|http|https):\/\/[^ "]+$/;
if (!pattern.test(url)) {
errMsg.textContent = "Wrong URL Entered";
dBtn.innerText = "Download File";
return;
}
errMsg.textContent = "";
fetch(url)
.then((res) => {
if (!res.ok) {
throw new Error("Network Problem");
}
return res.blob();
})
.then((file) => {
const ex = extFn(url);
let tUrl = URL.createObjectURL(file);
const tmp1 = document.createElement("a");
tmp1.href = tUrl;
tmp1.download = `downloaded_file.${ex}`;
document.body.appendChild(tmp1);
tmp1.click();
dBtn.innerText = "Download File";
URL.revokeObjectURL(tUrl);
tmp1.remove();
})
.catch(() => {
errMsg.textContent =
"Cannot Download Restricted Content!";
dBtn.innerText = "Download File";
});
}
function extFn(url) {
const match = url.match(/\.[0-9a-z]+$/i);
return match ? match[0].slice(1) : "";
}