initial program commit
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>ha.mr - link compressor</title>
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<style>
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@import url('https://fonts.googleapis.com/css2?family=Hammersmith+One&display=swap');
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html, body {
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margin: 0;
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width: 100%;
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height: 100%;
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}
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body {
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display: flex;
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justify-content: center;
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align-items: center;
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font-size: 120%;
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}
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* {
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font-family: "Hammersmith One", sans-serif;
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}
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#loader {
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position: absolute;
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border: 0.5em solid lightgray;
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border-radius: 50%;
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border-top: 0.5em solid gray;
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width: 3em;
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height: 3em;
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-webkit-animation: spin 1.5s linear infinite;
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animation: spin 1.5s linear infinite;
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opacity: 1;
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pointer-events: none;
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transition: opacity 1s;
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}
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@-webkit-keyframes spin {
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0% { -webkit-transform: rotate(0deg); }
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100% { -webkit-transform: rotate(360deg); }
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}
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@keyframes spin {
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0% { transform: rotate(0deg); }
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100% { transform: rotate(360deg); }
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}
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#content {
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display: flex;
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flex-direction: column;
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align-items: center;
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opacity: 0;
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pointer-events: none;
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transition: opacity 1s;
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}
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h1 {
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margin: 0;
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}
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p {
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margin-top: 0;
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}
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label {
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font-size: 0.9em;
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}
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span {
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text-align: center;
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}
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.title {
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font-size: 2.5em;
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}
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.subtitle {
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font-size: 0.6em;
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margin-top: -10px;
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font-style: italic;
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opacity: 0.8;
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}
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#input-link {
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padding: 5px 8px;
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border: 0;
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outline: 0;
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border-bottom: 2px solid darkgray;
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border-radius: 10px;
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margin: 10px 0;
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font-size: 16px;
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background-color: rgb(230, 230, 230);
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}
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#output-link-container {
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margin: 10px 0 0 0;
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text-align: center;
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}
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#output-link {
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color: rgb(50, 100, 255);
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word-break: break-all;
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}
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#output-ratio {
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transition: color 0.5s;
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color: gray;
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user-select: none;
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}
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#qrcode {
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display: none;
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}
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#qr-correct-level-container {
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display: none;
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}
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#query-warning {
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display: none;
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font-size: 1rem;
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text-align: justify;
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text-align-last: center;
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max-width: 80vmin;
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background-color: gold;
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padding: 5px 10px;
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border-radius: 10px;
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margin: 5px 0 15px 0;
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}
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#query-warning summary {
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cursor: pointer;
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}
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</style>
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<script src="/qrcode.js"></script>
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</head>
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<body>
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<div id="loader"></div>
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<div id="content">
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<h1 class="title">ha.mr</h1>
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<p class="subtitle">(read: "hammer")</p>
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<input type="text" id="input-link" placeholder="https://some-long.link/" autofocus>
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<details id="query-warning">
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<summary>Consider removing parameters...</summary>
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<br>
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Some links include data that isn't necessary for the link to function,
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such as tracking information or page state. This data comes in the
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form of <i>query parameters</i>, marked by "?" and "&" characters.
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<br><br>
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Removing these segments can sometimes significantly shorten the link
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without breaking it. For example, an Amazon product link contains a lot
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of tracking information. Everything past the "?" symbol can be safely
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removed, making the link much shorter.
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</details>
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<p id="output-link-container">
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<a id="output-link" target="_blank">Enter a link above to compress</a>
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<br><span id="output-ratio"> </span>
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</p>
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<image width="256" height="256" id="qrcode"></image>
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<span id="qr-correct-level-container">
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<label>QR code error correction threshold</label>
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<br>
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<input type="range" name="qr-correct-level" id="qr-correct-level" autocomplete="off" min="0" max="3" value="1">
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</span>
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<span style="margin-top:20px">
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<input type="checkbox" id="settings-emoji" name="settings-emoji" autocomplete="off">
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<label for="settings-emoji"> Use emoji in text output</label><br>
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</span>
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<span>
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<input type="checkbox" id="settings-qr" name="settings-qr" autocomplete="off">
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<label for="settings-qr"> Output QR code</label><br>
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</span>
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<br><br>
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</div>
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<script type="module" src="/main.js"></script>
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</body>
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</html>
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import { compress, decompress } from "./compress.js";
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import {
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outputAlphabetASCII,
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outputAlphabetQR,
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outputAlphabetEmoji
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} from "./alphabets.js";
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var settings = {
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emoji: false,
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qr: false
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};
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const settingsElements = {
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emoji: "#settings-emoji",
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qr: "#settings-qr"
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};
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for (const setting in settingsElements) {
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const element = document.querySelector(settingsElements[setting]);
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settings[setting] = element.checked;
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element.addEventListener("change", (event) => {
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settings[setting] = element.checked;
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updateOutput();
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});
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}
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function countSymbols (string, alphabet) {
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let count = 0;
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while (string) {
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const symbol = alphabet.find(c => string.endsWith(c));
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string = string.slice(0, symbol ? -symbol.length : -1);
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count ++;
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}
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return count;
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}
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const inputLinkElement = document.querySelector("#input-link");
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const outputLinkElement = document.querySelector("#output-link");
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const outputRatioElement = document.querySelector("#output-ratio");
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const queryWarningElement = document.querySelector("#query-warning");
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const qrCodeImage = document.querySelector("#qrcode");
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const qrCodeCorrectionLevelContainer = document.querySelector("#qr-correct-level-container");
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const qrCodeCorrectionLevelElement = document.querySelector("#qr-correct-level");
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qrCodeCorrectionLevelElement.addEventListener("change", updateOutput);
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function updateOutput () {
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const input = inputLinkElement.value.trim();
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try {
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const alphabet = settings.emoji ? outputAlphabetEmoji : outputAlphabetASCII;
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const output = compress(input, alphabet);
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let inputNormalized = input;
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if (input.startsWith("https://")) {
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inputNormalized = input.slice(8);
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} else if (input.startsWith("http://")) {
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inputNormalized = input.slice(7);
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}
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let excessiveParams = false;
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if (URL.canParse("http://" + inputNormalized)) {
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const url = new URL("http://" + inputNormalized);
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if (url.searchParams.size > 1) {
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excessiveParams = true;
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}
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}
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if (excessiveParams) {
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queryWarningElement.style.display = "inline";
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} else {
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queryWarningElement.style.display = "none";
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}
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const ratio = (1 - (countSymbols(output, alphabet) + 6) / inputNormalized.length) * 100;
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if (ratio < -300) {
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outputRatioElement.textContent = `Output is much larger than the input`;
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outputRatioElement.style.color = "rgb(255, 50, 50)";
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} else if (ratio < 0) {
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outputRatioElement.textContent = `Output is ${Math.floor(-ratio)}% larger than the input`;
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outputRatioElement.style.color = "rgb(255, 50, 50)";
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} else if (ratio > 0) {
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outputRatioElement.textContent = `Output is ${Math.ceil(ratio)}% smaller than the input`;
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outputRatioElement.style.color = "rgb(15, 190, 15)";
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} else {
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outputRatioElement.textContent = "Output is the same length as the input";
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outputRatioElement.style.color = "gray";
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}
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outputLinkElement.textContent = `http://ha.mr#${output}`;
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outputLinkElement.href = `http://ha.mr#${output}`;
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outputLinkElement.style.color = "";
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if (settings.qr) {
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const errorCorrection = ["L", "M", "Q", "H"][qrCodeCorrectionLevelElement.value];
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qrCodeImage.style.display = "inline";
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qrCodeCorrectionLevelContainer.style.display = "inline";
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let qrCodeLink = `HTTP://HA.MR/${compress(input, outputAlphabetQR)}`;
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QRCode.toDataURL(qrCodeLink, {
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errorCorrectionLevel: errorCorrection,
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scale: 8
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}, (err, url) => {
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if (err) {
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qrCodeImage.style.display = "none";
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qrCodeCorrectionLevelContainer.style.display = "none";
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return;
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}
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qrCodeImage.src = url;
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qrCodeImage.title = qrCodeLink;
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});
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} else {
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qrCodeImage.style.display = "none";
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qrCodeCorrectionLevelContainer.style.display = "none";
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}
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} catch (e) {
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if (!input.trim()) {
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outputLinkElement.textContent = "Enter a link above to compress";
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} else {
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outputLinkElement.textContent = "Invalid link";
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outputLinkElement.style.color = "rgb(255, 50, 50)";
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console.error(e);
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}
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qrCodeImage.style.display = "none";
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qrCodeCorrectionLevelContainer.style.display = "none";
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outputRatioElement.style.color = "rgba(255, 255, 255, 0)";
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outputLinkElement.removeAttribute("href");
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queryWarningElement.style.display = "none";
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}
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}
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inputLinkElement.addEventListener("input", updateOutput);
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(() => {
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let payload = null;
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let alphabet = outputAlphabetASCII;
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// Get hash value of current address bar
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if (window.location.hash) {
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// Decode hash value in case it's non-ASCII
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payload = decodeURIComponent(window.location.hash.slice(1));
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// Remove all whitespace - we never use whitespace when encoding hash values
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payload = payload.replaceAll(" ", "");
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// Check if input is pure ASCII - potentially unreliable?
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const useEmoji = Array.from(payload).some(c => !outputAlphabetASCII.includes(c));
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alphabet = useEmoji ? outputAlphabetEmoji : outputAlphabetASCII;
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} else {
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// If no hash value, we're likely reading a QR code
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// For that, use the path instead
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payload = decodeURIComponent(window.location.pathname.slice(1));
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alphabet = outputAlphabetQR;
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}
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if (payload && payload.trim()) {
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try {
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const target = decompress(payload, alphabet);
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window.location.href = target;
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return;
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} catch (e) {
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console.warn(`Redirect failed. Could not decode input.`);
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console.error(e);
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}
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}
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updateOutput();
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document.querySelector("#loader").style.opacity = 0;
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document.querySelector("#content").style.opacity = 1;
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document.querySelector("#content").style.pointerEvents = "auto";
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})();
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import { compress, decompress } from "./compress.js";
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import {
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outputAlphabetASCII,
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outputAlphabetQR,
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outputAlphabetEmoji
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} from "./alphabets.js";
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const input = process.argv[2]?.trim();
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const alphabetName = process.argv[3]?.trim() || "ascii";
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if (!input) {
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console.error(`Usage: hamr <link> [ascii|qr|emoji]`);
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process.exit(1);
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}
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let payload = "";
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if (input.toLowerCase().startsWith("http://ha.mr")) {
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payload = input.slice(12);
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} else if (input.toLowerCase().startsWith("https://ha.mr")) {
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payload = input.slice(13);
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} else if (input.toLowerCase().startsWith("ha.mr")) {
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payload = input.slice(5);
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}
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if (payload) {
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const isQRCode = input[0] === "/";
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payload = payload.slice(1);
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const useEmoji = Array.from(payload).some(c => !outputAlphabetASCII.includes(c));
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if (isQRCode) console.log(decompress(payload, outputAlphabetQR));
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else console.log(decompress(payload, useEmoji ? outputAlphabetEmoji : outputAlphabetASCII));
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process.exit(0);
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}
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let alphabet = outputAlphabetASCII;
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if (alphabetName === "qr") alphabet = outputAlphabetQR;
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else if (alphabetName === "emoji") alphabet = outputAlphabetEmoji;
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else if (alphabetName !== "ascii") {
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console.error(`Unknown alphabet "${alphabetName}".`);
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console.error("Select one of: ascii, qr, emoji");
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process.exit(2);
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}
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if (alphabetName === "qr") {
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console.log("HTTP://HA.MR/" + compress(input, alphabet));
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} else {
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console.log("http://ha.mr#" + compress(input, alphabet));
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}
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