142 lines
3.8 KiB
JavaScript
142 lines
3.8 KiB
JavaScript
const EventEmitter = require('events');
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const UIWrapper = require('./file').UIWrapper;
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let onChange = (event) => {
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let file = event.target.files[0];
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let reader = new FileReader();
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reader.readAsArrayBuffer(file);
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let random_iv = window.crypto.getRandomValues(new Uint8Array(16));
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let hex = ivToStr(random_iv);
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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((key) => {
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let arrayBuffer = self.result;
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let array = new Uint8Array(arrayBuffer);
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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(uploadFile.bind(null, file, hex, key))
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.catch((err) => console.error(err));
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}).catch((err) => console.error(err));
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};
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}
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window.onChange = onChange;
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let uploadFile = (file, hex, key, encrypted) => {
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let dataView = new DataView(encrypted);
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let blob = new Blob([dataView], { type: file.type });
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let 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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let xhr = new XMLHttpRequest();
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xhr.open("post", "/upload/" + hex, true);
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let listelem = setupUI();
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listelem.emit('name', file.name);
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xhr.upload.addEventListener("progress", updateProgress.bind(null, listelem));
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xhr.onreadystatechange = () => {
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if (xhr.readyState == XMLHttpRequest.DONE) {
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window.crypto.subtle.exportKey("jwk", key).then((keydata) => {
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localStorage.setItem(hex, xhr.responseText);
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listelem.emit('link', "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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let updateProgress = (UIelem, e) => {
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if (e.lengthComputable) {
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let percentComplete = Math.floor((e.loaded / e.total) * 100);
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UIelem.emit('progress', "Progress: " + percentComplete + "%")
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if (percentComplete === 100) {
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let btn = document.createElement("button");
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btn.innerText = "Delete from server";
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btn.addEventListener("click", () => {
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let segments = UIelem.link.innerText.split("/");
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let key = segments[segments.length - 2];
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let 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 = () => {
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if (xhr.readyState === XMLHttpRequest.DONE) {
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document.getElementById("uploaded_files").removeChild(UIelem.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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UIelem.li.appendChild(btn);
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}
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}
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}
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let setupUI = () => {
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let li = document.createElement("li");
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let name = document.createElement("p");
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li.appendChild(name);
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let link = document.createElement("a");
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li.appendChild(link);
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let 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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return new UIWrapper(li, name, link, progress);
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}
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let ivToStr = (iv) => {
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let hexStr = "";
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for (let 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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let strToIv = (str) => {
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let iv = new Uint8Array(16);
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for (let 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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} |