mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2025-11-04 00:22:26 -06:00
211192c482
- replaces the sha256 calculation with an alternative implementation that seems to use more uniform time-taken across different platforms - goes back to the simpler difficulty calculation without a "partial" difficulty level Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4096 Co-authored-by: kim <grufwub@gmail.com> Co-committed-by: kim <grufwub@gmail.com>
95 lines
3.5 KiB
JavaScript
95 lines
3.5 KiB
JavaScript
/*
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GoToSocial
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Copyright (C) GoToSocial Authors admin@gotosocial.org
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SPDX-License-Identifier: AGPL-3.0-or-later
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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const explanation = "Your browser is currently solving a proof-of-work challenge designed to deter \"ai\" scrapers. This should take no more than a few seconds...";
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document.addEventListener("DOMContentLoaded", function() {
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// Get the nollamas section container.
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const nollamas = document.querySelector(".nollamas");
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// Add some "loading" text to show that
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// a proof-of-work captcha is being done.
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const p = this.createElement("p");
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p.className = "nollamas-explanation";
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p.appendChild(document.createTextNode(explanation));
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nollamas.appendChild(p);
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// Add a loading spinner, but only
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// animate it if motion is allowed.
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const spinner = document.createElement("i");
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spinner.className = "fa fa-spinner fa-2x fa-fw nollamas-status";
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if (!window.matchMedia('(prefers-reduced-motion: reduce)').matches) {
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spinner.className += " fa-pulse";
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}
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spinner.setAttribute("title","Solving...");
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spinner.setAttribute("aria-label", "Solving");
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nollamas.appendChild(spinner);
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// Read the challenge and difficulty from
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// data attributes on the nollamas section.
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const challenge = nollamas.dataset.nollamasChallenge;
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const difficulty = nollamas.dataset.nollamasDifficulty;
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console.log("challenge:", challenge); // eslint-disable-line no-console
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console.log("difficulty:", difficulty); // eslint-disable-line no-console
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// Prepare the worker with task function.
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const worker = new Worker("/assets/dist/nollamasworker.js");
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const startTime = performance.now();
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worker.postMessage({
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challenge: challenge,
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difficulty: difficulty,
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});
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// Set the main worker function.
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worker.onmessage = function (e) {
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if (e.data.done) {
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const endTime = performance.now();
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const duration = endTime - startTime;
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// Remove spinner and replace it with a tick
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// and info about how long it took to solve.
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nollamas.removeChild(spinner);
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const solutionWrapper = document.createElement("div");
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solutionWrapper.className = "nollamas-status";
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const tick = document.createElement("i");
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tick.className = "fa fa-check fa-2x fa-fw";
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tick.setAttribute("title","Solved!");
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tick.setAttribute("aria-label", "Solved!");
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solutionWrapper.appendChild(tick);
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const took = document.createElement("span");
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const solvedText = `Solved after ${e.data.nonce} iterations, in ${duration.toString()}ms!`;
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took.appendChild(document.createTextNode(solvedText));
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solutionWrapper.appendChild(took);
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nollamas.appendChild(solutionWrapper);
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// Wait for 500ms before redirecting, to give
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// visitors a shot at reading the message, but
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// not so long that they have to wait unduly.
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setTimeout(() => {
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let url = new URL(window.location.href);
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url.searchParams.set("nollamas_solution", e.data.nonce);
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window.location.replace(url.toString());
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}, 500);
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}
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};
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});
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