141 lines
4.4 KiB
JavaScript
141 lines
4.4 KiB
JavaScript
function onChange(event) {
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var file = event.target.files[0];
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var reader = new FileReader();
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reader.onload = function(event) {
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let self = this;
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window.crypto.subtle.generateKey({
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name: "AES-CBC",
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length: 128
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},
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true,
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["encrypt", "decrypt"])
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.then(function(key){
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var arrayBuffer = self.result;
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var array = new Uint8Array(arrayBuffer);
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var random_iv = window.crypto.getRandomValues(new Uint8Array(16));
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window.crypto.subtle.encrypt({
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name: "AES-CBC",
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iv: random_iv },
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key,
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array)
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.then(function(encrypted){
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var dataView = new DataView(encrypted);
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var blob = new Blob([dataView], { type: file.type });
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var fd = new FormData();
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fd.append("fname", file.name);
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fd.append("data", blob, file.name);
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var xhr = new XMLHttpRequest();
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var hex = ivToStr(random_iv);
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xhr.open("post", "/upload/" + hex, true);
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var li = document.createElement("li");
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var name = document.createElement("p");
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name.innerHTML = file.name;
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li.appendChild(name);
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var link = document.createElement("a");
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li.appendChild(link);
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var progress = document.createElement("p");
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li.appendChild(progress);
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document.getElementById("uploaded_files").appendChild(li);
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xhr.upload.addEventListener("progress", returnBindedLI(progress, name, link, li));
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xhr.onreadystatechange = function() {
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if (xhr.readyState == XMLHttpRequest.DONE) {
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window.crypto.subtle.exportKey("jwk", key).then(function(keydata) {
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var curr_name = localStorage.getItem(file.name);
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localStorage.setItem(hex, xhr.responseText);
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link.innerHTML = "http://localhost:3000/download/" + hex + "/#" + keydata.k;
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link.setAttribute("href", "http://localhost:3000/download/" + hex + "/#" + keydata.k);
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console.log("Share this link with a friend: http://localhost:3000/download/" + hex + "/#" + keydata.k);
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})
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}
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};
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xhr.send(fd);
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})
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.catch(function(err){
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console.error(err);
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});
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})
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.catch(function(err){
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console.error(err);
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});
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};
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reader.readAsArrayBuffer(file);
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}
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function ivToStr(iv) {
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let hexStr = "";
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for (var i in iv) {
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if (iv[i] < 16) {
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hexStr += "0" + iv[i].toString(16);
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} else {
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hexStr += iv[i].toString(16);
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}
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}
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window.hexStr = hexStr;
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return hexStr;
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}
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function strToIv(str) {
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var iv = new Uint8Array(16);
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for (var i = 0; i < str.length; i += 2) {
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iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
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}
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return iv;
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}
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function returnBindedLI(a_element, name, link, li) {
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return function updateProgress(e) {
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if (e.lengthComputable) {
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var percentComplete = Math.floor((e.loaded / e.total) * 100);
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a_element.innerHTML = "Progress: " + percentComplete + "%";
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if (percentComplete === 100) {
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var btn = document.createElement("button");
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btn.innerHTML = "Delete from server";
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btn.addEventListener("click", function() {
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var segments = link.innerHTML.split("/");
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var key = segments[segments.length - 2];
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var xhr = new XMLHttpRequest();
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xhr.open("post", "/delete/" + key, true);
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xhr.setRequestHeader("Content-Type", "application/json");
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if (!localStorage.getItem(key)) return;
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xhr.send(JSON.stringify({delete_token: localStorage.getItem(key)}));
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xhr.onreadystatechange = function() {
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if (xhr.readyState === XMLHttpRequest.DONE) {
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document.getElementById("uploaded_files").removeChild(li);
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localStorage.removeItem(key);
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}
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if (xhr.status === 200) {
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console.log("The file was successfully deleted.");
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} else {
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console.log("The file has expired, or has already been deleted.");
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}
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}
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});
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li.appendChild(btn);
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}
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}
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}
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}
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