156 lines
9.4 KiB
HTML
156 lines
9.4 KiB
HTML
<!DOCTYPE html>
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<title>JSDoc: Source: utils/linkUtils.js</title>
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<h1 class="page-title">Source: utils/linkUtils.js</h1>
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<section>
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<article>
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<pre class="prettyprint source linenums"><code>/*Canopy - The next generation of stoner streaming software
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Copyright (C) 2024-2025 Rainbownapkin and the TTN Community
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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
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published by the Free Software Foundation, either version 3 of the
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License, or (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 <https://www.gnu.org/licenses/>.*/
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//NPM Imports
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const validator = require('validator');//No express here, so regular validator it is!
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//Create link cache
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/**
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* Basic RAM-Based cache of links, so we don't have to re-pull things after we get them
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*/
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module.exports.cache = new Map();
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/**
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* Validates links and returns a marked link object that can be returned to the client to format/embed accordingly
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* @param {String} link - URL to Validate
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* @returns {Object} Marked link object
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*/
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module.exports.markLink = async function(link){
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//Check link cache for the requested link
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const cachedLink = module.exports.cache.get(link);
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//If we have a cached result
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if(cachedLink){
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//return the cached link
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return cachedLink;
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}
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//Set max file size to 4MB
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const maxSize = 4000000;
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//Assume links are guilty until proven innocent
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var type = "malformedLink"
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//Make sure we have an actual, factual URL
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if(validator.isURL(link)){
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//The URL is valid, so this is at least a dead link
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type = 'deadLink';
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//Don't try this at home, we're what you call "Experts"
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//TODO: Handle this shit simultaneously and send the chat before its done, then send updated types for each link as they're pulled individually
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try{
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//Pull content type
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var response = await fetch(link,{
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method: "HEAD",
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});
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//If we made it this far then the link is, at the very least, not dead.
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type = 'link'
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//Get file type from header
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const fileType = response.headers.get('content-type');
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const fileSize = response.headers.get('content-length');
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//If they're reporting file types
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if(fileType != null){
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//If we have an image
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if(fileType.match('image/')){
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//If the file size is unreported OR it's smaller than 4MB (not all servers report this and images that big are pretty rare)
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if(fileSize == null || fileSize <= maxSize){
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//Mark link as an image
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type = 'image';
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}
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//If it's a video
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}else if(fileType.match('video/mp4' || 'video/webm')){
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//If the server is reporting file-size and it's reporting under 4MB (Reject unreported sizes to be on the safe side is video is huge)
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if(fileSize != null && fileSize <= maxSize){
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//mark link as a video
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type = 'video';
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}
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}
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}
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//Probably bad form but if something happens in here I'm blaming whoever hosted the link
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//maybe don't host a fucked up server and I wouldn't handle with an empty catch
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}catch{};
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}
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//Create the link object from processed information
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const linkObj = {
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link,
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type
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}
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//Cache the result
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module.exports.cache.set(link, linkObj);
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//Set timer to remove cache entry in five minutes
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setTimeout(()=>{
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module.exports.cache.delete(link);
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}, 300000)
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//return the link
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return linkObj;
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}</code></pre>
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</article>
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</section>
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Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.4</a> on Tue Sep 02 2025 07:28:58 GMT-0400 (Eastern Daylight Time)
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