From 030625afa842b179ac6d14622337c2bb2175065e Mon Sep 17 00:00:00 2001 From: flashwave Date: Mon, 28 Oct 2024 03:40:26 +0000 Subject: [PATCH] Switched to Deno + WIP. --- LICENCE | 30 ++ README.md | 6 + deno.lock | 28 + ecosystem.config.js | 9 + extract.mjs | 75 --- package-lock.json | 1237 ------------------------------------------- package.json | 7 - uiharu.js | 77 --- uiharu.ts | 665 +++++++++++++++++++++++ 9 files changed, 738 insertions(+), 1396 deletions(-) create mode 100644 LICENCE create mode 100644 README.md create mode 100644 deno.lock create mode 100644 ecosystem.config.js delete mode 100644 extract.mjs delete mode 100644 package-lock.json delete mode 100644 package.json delete mode 100644 uiharu.js create mode 100644 uiharu.ts diff --git a/LICENCE b/LICENCE new file mode 100644 index 0000000..c9caa9a --- /dev/null +++ b/LICENCE @@ -0,0 +1,30 @@ +Copyright (c) 2021-2024, flashwave +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted (subject to the limitations in the disclaimer +below) provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + * Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from this + software without specific prior written permission. + +NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY +THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND +CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR +BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER +IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..4d010a7 --- /dev/null +++ b/README.md @@ -0,0 +1,6 @@ +# Uiharu + +Uiharu is a service that looks up metadata for a given URL. + +It runs on the [Deno](https://deno.com/) Javascript runtime and requires a [Memcached](https://www.memcached.org/) server for caching. +HTML wrangling is done using the [Cheerio](https://github.com/cheeriojs/cheerio) library. diff --git a/deno.lock b/deno.lock new file mode 100644 index 0000000..7b19394 --- /dev/null +++ b/deno.lock @@ -0,0 +1,28 @@ +{ + "version": "4", + "specifiers": { + "jsr:@std/fs@*": "1.0.5", + "jsr:@std/path@*": "1.0.7", + "jsr:@std/path@^1.0.7": "1.0.7" + }, + "jsr": { + "@std/fs@1.0.5": { + "integrity": "41806ad6823d0b5f275f9849a2640d87e4ef67c51ee1b8fb02426f55e02fd44e", + "dependencies": [ + "jsr:@std/path@^1.0.7" + ] + }, + "@std/path@1.0.7": { + "integrity": "76a689e07f0e15dcc6002ec39d0866797e7156629212b28f27179b8a5c3b33a1" + } + }, + "workspace": { + "packageJson": { + "dependencies": [ + "npm:cheerio@1", + "npm:express@^5.0.1", + "npm:memcache-client@^1.0.5" + ] + } + } +} diff --git a/ecosystem.config.js b/ecosystem.config.js new file mode 100644 index 0000000..344f813 --- /dev/null +++ b/ecosystem.config.js @@ -0,0 +1,9 @@ +module.exports = { + apps: [ + { + script: './uiharu.ts', + interpreter: 'deno', + interpreterArgs: 'run --allow-net --allow-read --allow-run --allow-env', + }, + ], +}; diff --git a/extract.mjs b/extract.mjs deleted file mode 100644 index 73ce1cc..0000000 --- a/extract.mjs +++ /dev/null @@ -1,75 +0,0 @@ -import * as cheerio from 'cheerio'; - -const readStdIn = () => { - return new Promise((resolve, reject) => { - let stdIn = ''; - - process.stdin.on('data', data => stdIn += data); - process.stdin.on('end', () => resolve(stdIn)); - process.stdin.on('error', err => reject(err)); - }); -}; - -const $ = cheerio.load(await readStdIn()); -const info = { - title: '', - metaTitle: '', - desc: '', - siteName: '', - image: '', - colour: '', - type: 'website', -}; - -const titleTag = $('title').first(); -if(titleTag.length > 0) - info.title = titleTag.text().trim(); - -const metaTags = $('meta'); -for(const elemInfo of metaTags) { - const elem = $(elemInfo); - - const nameAttr = (elem.attr('name') ?? elem.attr('property') ?? '').trim(); - if(nameAttr === '') - continue; - - const valueAttr = (elem.attr('value') ?? elem.attr('content') ?? '').trim(); - - switch(nameAttr) { - case 'og:title': - case 'twitter:title': - if(info.metaTitle === '' || valueAttr.length > info.metaTitle.length) - info.metaTitle = valueAttr; - break; - - case 'description': - case 'og:description': - case 'twitter:description': - if(info.desc === '' || valueAttr.length > info.desc.length) - info.desc = valueAttr; - break; - - case 'og:site_name': - if(info.siteName === '') - info.siteName = valueAttr; - break; - - case 'og:image': - case 'twitter:image': - if(info.image === '') - info.image = valueAttr; - break; - - case 'theme-color': - if(info.colour === '') - info.colour = valueAttr; - break; - - case 'og:type': - if(info.type === '') - info.type = `website:${valueAttr}`; - break; - } -} - -console.log(JSON.stringify(info)); diff --git a/package-lock.json b/package-lock.json deleted file mode 100644 index b52159f..0000000 --- a/package-lock.json +++ /dev/null @@ -1,1237 +0,0 @@ -{ - "name": "uiharu.edgii.net", - "lockfileVersion": 3, - "requires": true, - 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"version": "4.0.0", - "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-4.0.0.tgz", - "integrity": "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==", - "license": "MIT", - "engines": { - "node": ">=18" - } - }, - "node_modules/wrappy": { - "version": "1.0.2", - "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz", - "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==", - "license": "ISC" - } - } -} diff --git a/package.json b/package.json deleted file mode 100644 index c04dbdf..0000000 --- a/package.json +++ /dev/null @@ -1,7 +0,0 @@ -{ - "dependencies": { - "cheerio": "^1.0.0", - "express": "^5.0.1", - "memcache-client": "^1.0.5" - } -} diff --git a/uiharu.js b/uiharu.js deleted file mode 100644 index e57d339..0000000 --- a/uiharu.js +++ /dev/null @@ -1,77 +0,0 @@ -const express = require('express'); -const fs = require('fs'); -const memcache = require('memcache-client'); -const { join: pathJoin } = require('path'); - -// todo: these should not be hardcoded lol -const port = 3009; -const memcacheServer = "localhost:11211"; -const allowedOrigins = [ - 'edgii.net', - 'chat.edgii.net', - 'sockchat.edgii.net', - 'ajaxchat.edgii.net', -]; - -const app = express(); -const isDebug = fs.existsSync(pathJoin(__dirname, '.debug')); -const cache = new memcache.MemcacheClient({ server: memcacheServer }); - -const handleMetadata = (res, req, url) => { - // -}; - -app.use((req, res, next) => { - res.set('X-Powered-By', 'Uiharu'); - - const origin = req.get('origin'); - if(origin !== undefined) { - const originObj = new URL(origin); - if(!allowedOrigins.includes(originObj.host)) { - res.status(403).end(); - return; - } - - res.set('Access-Control-Allow-Origin', origin); - res.set('Vary', 'Origin'); - } - - if(req.method === 'OPTIONS') - res.set('Access-Control-Allow-Methods', 'OPTIONS, GET, POST'); - - next(); -}); - -app.use(express.static('public')); - -app.get('/metadata', (req, res) => { - res.status(501).send('Not Implemented'); -}); - -app.post('/metadata', (req, res) => { - res.status(501).send('Not Implemented'); -}); - -app.get('/metadata/batch', (req, res) => { - res.type('application/json') - .send('{"took":0,"results":[]}') - .end(); -}); - -app.post('/metadata/batch', (req, res) => { - res.type('application/json') - .send('{"took":0,"results":[]}') - .end(); -}); - -app.get('/metadata/thumb/audio', (req, res) => { - res.status(501).send('Not Implemented'); -}); - -app.get('/metadata/thumb/video', (req, res) => { - res.status(501).send('Not Implemented'); -}); - -app.listen(port, () => { - console.log(`Uiharu listening to port ${port}!`); -}); diff --git a/uiharu.ts b/uiharu.ts new file mode 100644 index 0000000..208b9ac --- /dev/null +++ b/uiharu.ts @@ -0,0 +1,665 @@ +import * as cheerio from 'npm:cheerio@^1.0.0'; +import { MemcacheClient } from 'npm:memcache-client@^1.0.5'; +import { existsSync } from "jsr:@std/fs"; +import { basename, join as pathJoin } from "jsr:@std/path"; +import { normalize as pathNormalize } from "jsr:@std/path/normalize"; +import { encodeBase64Url } from "jsr:@std/encoding/base64url"; +import { brotliCompressSync, brotliDecompressSync } from "node:zlib"; +import { parseMediaType } from "jsr:@std/media-types"; +import { Color } from "https://deno.land/x/color@v0.3.0/mod.ts"; + +// todo: these should not be hardcoded lol +const port: Number = 3009; +const memcacheServer: String = "127.0.0.1:11211"; +const allowedOrigins: String[] = [ + 'edgii.net', + 'chat.edgii.net', + 'sockchat.edgii.net', + 'ajaxchat.edgii.net', +]; +const allowOEmbed: String[] = [ // copied from wordpress source sorta + '.youtube.com', + '.youtu.be', + '.vimeo.com', + '.dailymotion.com', + '.dai.ly', + '.flickr.com', + '.flic.kr', + '.smugmug.com', + '.scribd.com', + '.wordpress.tv', + '.crowdsignal.net', + '.polldaddy.com', + '.poll.fm', + '.survey.fm', + '.twitter.com', + '.soundcloud.com', + '.spotify.com', + '.imgur.com', + '.issuu.com', + '.mixcloud.com', + '.ted.com', + '.animoto.com', + '.video214.com', + '.tumblr.com', + '.kickstarter.com', + '.kck.st', + '.cloudup.com', + '.reverbnation.com', + '.videopress.com', + '.reddit.com', + '.speakerdeck.com', + '.screencast.com', + '.amazon.com', + '.amazon.com.mx', + '.amazon.com.br', + '.amazon.ca', + '.amazon.co.uk', + '.amazon.de', + '.amazon.fr', + '.amazon.it', + '.amazon.es', + '.amazon.in', + '.amazon.nl', + '.amazon.ru', + '.amazon.co.jp', + '.amazon.com.au', + '.amazon.cn', + '.a.co', + '.amzn.to', + '.amzn.eu', + '.amzn.in', + '.amzn.asia', + '.z.cn', + '.somecards.com', + '.some.ly', + '.tiktok.com', + '.pinterest.com', + '.pinterest.com.au', + '.pinterest.com.mx', + '.wolframcloud.com', + '.pca.st', + '.anghami.com', + '.bsky.app', + '.apple.com', +]; + +const isDebug: Boolean = existsSync(pathJoin(import.meta.dirname, '.debug')); +const cache: MemcacheClient = new MemcacheClient({ + server: memcacheServer, + compressor: { + // fuck it lol + compressSync: buffer => buffer, + decompressSync: buffer => buffer, + }, +}); + +const readableStreamToString = async (stream?: ReadableStream): string => { + if(stream === null) + return ''; + + const reader = stream.getReader(); + const decoder = new TextDecoder; + let result = ''; + + for(;;) { + const { done, value } = await reader.read(); + if(done) break; + result += decoder.decode(value, { stream: true }); + } + + result += decoder.decode(); + + return result; +}; + +const isAllowedOEmbedDomain = (domain: string): Boolean => { + if(!domain.startsWith('.')) + domain = '.' + domain; + + for(const suffix of allowOEmbed) + if(domain.endsWith(suffix)) + return true; + + return false; +}; + +const extractHtmlMetaData = (html) => { + const values = {}; + + const titleTag = html('title')?.first()?.text().trim() ?? ''; + if(titleTag.length > 0) + values.title = titleTag; + + const metaDescriptionTag = html('meta[name="description"]').first()?.attr('content')?.trim() ?? ''; + if(metaDescriptionTag.length > 0) + values.description = metaDescriptionTag; + + const metaThumbnailTag = html('meta[name="thumbnail"]').first()?.attr('content')?.trim() ?? ''; + if(metaThumbnailTag.length > 0) + values.thumbnail = metaThumbnailTag; + + const metaThemeColorTag = html('meta[name="theme-color"]').first()?.attr('content')?.trim() ?? ''; + if(metaThemeColorTag.length > 0) + values.theme_color = Color.string(metaThemeColorTag).hex(); + + const linkImageSrcTag = html('link[rel="image_src"]').first()?.attr('href')?.trim() ?? ''; + if(linkImageSrcTag.length > 0) + values.image = linkImageSrcTag; + + const linkCanonicalTag = html('link[rel="canonical"]').first()?.attr('href')?.trim() ?? ''; + if(linkCanonicalTag.length > 0) + values.canonical_url = linkCanonicalTag; + + return values; +}; + +const extractOpenGraphData = (html) => { + const values = {}; + + // this is hateful + const properties = { + 'url': { type: 'url' }, + 'type': { type: 'str' }, + 'title': { type: 'str' }, + 'locale': { type: 'str' }, + 'locale:alternate': { type: 'str', array: 'locales' }, + 'description': { type: 'str' }, + 'determiner': { type: 'str' }, + 'site_name': { type: 'str' }, + + 'image': { alias: 'image:url', array: 'images' }, + 'image:url': { of: 'image', type: 'url' }, + 'image:secure_url': { of: 'image', type: 'url', protos: ['https:'] }, + 'image:type': { of: 'image', type: 'mime' }, + 'image:width': { of: 'image', type: 'int' }, + 'image:height': { of: 'image', type: 'int' }, + 'image:alt': { of: 'image', type: 'string' }, + + 'video': { alias: 'video:url', array: 'videos' }, + 'video:url': { of: 'video', type: 'url' }, + 'video:secure_url': { of: 'video', type: 'url', protos: ['https:'] }, + 'video:type': { of: 'video', type: 'mime' }, + 'video:width': { of: 'video', type: 'int' }, + 'video:height': { of: 'video', type: 'int' }, + 'video:tag': { of: 'video', type: 'str', array: 'tags' }, + + 'audio': { alias: 'audio:url', array: 'audios' }, + 'audio:url': { of: 'audio', type: 'url' }, + 'audio:secure_url': { of: 'audio', type: 'url', protos: ['https:'] }, + 'audio:type': { of: 'audio', type: 'mime' }, + }; + + const tags = html('meta[property^="og:"]'); + for(const tagInfo of tags) { + const tag = html(tagInfo); + + let name = (tag.attr('property')?.trim() ?? '').substring(3); + if(!(name in properties)) + continue; + + let value = tag.attr('content')?.trim() ?? ''; + + let propInfo = properties[name]; + let target = values; + + if(propInfo.alias) { + name = propInfo.alias; + propInfo = properties[name]; + } + + if(propInfo.of) { + name = name.substring(propInfo.of.length + 1); + const objInfo = properties[propInfo.of]; + + if(objInfo.array) { + if(objInfo.array in target) + target = target[objInfo.array]; + else + target = target[objInfo.array] = []; + + const lastItem = target[target.length - 1]; + if(lastItem === undefined || name in lastItem) { + const newItem = {}; + target.push(newItem); + target = newItem; + } else + target = lastItem; + } else { + if(!(name in target)) + target[name] = {}; + + target = target[name]; + } + } + + if(propInfo.array) { + if(propInfo.array in target) + target = target[propInfo.array]; + else + target = target[propInfo.array] = []; + } else if(name in target) + continue; + + if(propInfo.type === 'int') + value = parseInt(value); + else { + if(propInfo.type === 'mime') { + // world's most naive validation + if(value.indexOf('/') < 0) + value = undefined; + } else if(propInfo.type === 'url') { + try { + const protos = propInfo.protos ?? ['https:', 'http:']; + if(!protos.includes(new URL(value).protocol)) + value = undefined; + } catch(ex) { + console.error(ex); + value = undefined; + } + } else if(propInfo.type !== 'str') + value = undefined; + } + + if(value) { + if(propInfo.array) + target.push(value); + else + target[name] = value; + } + } + + return values; +}; + +const extractTwitterData = (html) => { + const values = {}; + const properties = [ + 'card', + 'site', + 'site:id', + 'creator', + 'creator:id', + 'description', + 'title', + 'image', + 'image:alt', + 'player', + 'player:width', + 'player:height', + 'player:stream', + ]; + + for(const property of properties) { + const tag = html(`meta[name="twitter:${property}"]`)?.first()?.attr('content')?.trim() ?? ''; + if(tag.length > 0) + values[property.replace(':', '_')] = tag; + } + + return values; +}; + +const extractLinkedData = (html) => { + const values = []; + + const tags = html('script[type="application/ld+json"]'); + for(const tagInfo of tags) + try { + values.push(JSON.parse(html(tagInfo).text().trim())); + } catch(ex) { + console.error(ex); + } + + return values; +}; + +const extractOEmbedData = async (html, url: string, urlInfo: URL) => { + // TODO: this should also support header discovery + + let oEmbedUrl: string = ''; + + // idk how long i'll bother with this for + if(urlInfo.host === 'x.com' || urlInfo.host === 'twitter.com') + oEmbedUrl = `https://publish.twitter.com/oembed?dnt=true&omit_script=true&url=${encodeURIComponent(url)}`; + else + oEmbedUrl = html('link[rel="alternate"][type="application/json+oembed"]').first()?.attr('href')?.trim() ?? ''; + + if(oEmbedUrl === '') + return {}; + + try { + return (await fetch(oEmbedUrl)).json(); + } catch(ex) { + console.error(ex); + return {}; + } +}; + +const extractMetadata = async (url: string, urlInfo: URL) => { + const data = await fetch(url); + const contentTypeRaw = data.headers.get('content-type') ?? ''; + const contentType = parseMediaType(contentTypeRaw); + + const info = {}; + const addInfoOrDont = (prop, value) => { + if(value !== null && value !== undefined) + info[prop] = value; + }; + + if(contentTypeRaw) + info.media_type = contentType[0]; + + if(['text/html', 'application/xhtml+xml'].includes(contentType[0])) { + const html = cheerio.load(await readableStreamToString(data.body)); + + const metaData = extractHtmlMetaData(html); + const ogData = extractOpenGraphData(html); + const twitterData = extractTwitterData(html); + + addInfoOrDont('url', ogData.url ?? metaData.canonical_url ?? url); + addInfoOrDont('title', ogData.title ?? twitterData.title ?? metaData.title); + addInfoOrDont('site_name', ogData.site_name); + addInfoOrDont('description', ogData.description ?? twitterData.description ?? metaData.description); + addInfoOrDont('color', metaData.theme_color); + + if(ogData.images?.length > 0) { + const image = ogData.images[0]; + info.image = info.image_url = image.secure_url ?? image.url; + if(image.width > 0) + info.image_width = image.width; + if(image.height > 0) + info.image_height = image.height; + if(image.type) + info.image_type = image.type; + if(image.alt) + info.image_alt = image.alt; + if(info.image_width > 0) + info.width = info.image_width; + if(info.image_height > 0) + info.height = info.image_height; + } else { + addInfoOrDont('image_url', twitterData.image ?? metaData.image ?? metaData.thumbnail); + addInfoOrDont('image_alt', twitterData.image_alt); + if(info.image_url) + info.image = info.image_url; + } + + if(ogData.audios?.length > 0) { + const audio = ogData.audios[0]; + info.audio_url = audio.secure_url ?? audio.url; + if(audio.type) + info.audio_type = audio.type; + } + + if(ogData.videos?.length > 0) { + const video = ogData.videos[0]; + info.video_url = video.secure_url ?? video.url; + if(video.width > 0) + info.video_width = video.width; + if(video.height > 0) + info.video_height = video.height; + if(video.type) + info.video_type = video.type; + if(video.tags?.length > 0) + info.video_tags = video.tags; + if(info.video_width > 0) + info.width = info.video_width; + if(info.video_height > 0) + info.height = info.video_height; + } else { + addInfoOrDont('video_url', twitterData.player); + addInfoOrDont('video_width', twitterData.player_width); + addInfoOrDont('video_height', twitterData.player_height); + if(info.video_width > 0) + info.width = info.video_width; + if(info.video_height > 0) + info.height = info.video_height; + } + + const linkedDatas = extractLinkedData(html); + if(linkedDatas.length > 0) + info.lds = linkedDatas; + + if(isAllowedOEmbedDomain(urlInfo.host)) { + const oEmbedData = await extractOEmbedData(html, url, urlInfo); + if(oEmbedData.version) + info.oembed = oEmbedData; + } + } else { + info.url = url; + info.title = decodeURIComponent(basename(urlInfo.pathname)); + info.site_name = urlInfo.host; + + if(contentType[0].startsWith('image/')) { + // + } else if(contentType[0].startsWith('video/')) { + // + } else if(contentType[0].startsWith('audio/')) { + // + } + } + + return info; +}; + +const requestHandler = async (req: Request): Response => { + const url = new URL(req.url); + const headers = { 'X-Powered-By': 'Uiharu' }; + + if(req.headers.has('origin')) { + const originRaw = req.headers.get('origin'); + const origin = new URL(originRaw); + + if(!allowedOrigins.includes(origin.host)) + return new Response('403', { status: 403, headers }); + + headers['Access-Control-Allow-Origin'] = originRaw; + headers['Vary'] = 'Origin'; + } + + if(req.method === 'OPTIONS') { + headers['Allow'] = 'OPTIONS, GET, HEAD, POST'; + headers['Access-Control-Allow-Methods'] = 'OPTIONS, GET, HEAD, POST'; + + // idk if this is the appropriate status code but: balls + return new Response('', { status: 204, headers }); + } + + if(url.pathname === '/metadata') { + if(!['GET', 'HEAD', 'POST'].includes(req.method)) + return new Response('', { status: 405, headers }); + + const started = performance.now(); + + headers['Content-Type'] = 'application/json;charset=utf-8'; + + let urlParamRaw: String = ''; + if(req.method === 'POST') + urlParamRaw = (await readableStreamToString(req.body)).trim(); + else + urlParamRaw = (new URLSearchParams(url.search)).get('url')?.trim() ?? ''; + + if(urlParamRaw === '') + return new Response('{"error":"metadata:uri"}', { status: 400, headers }); + if(urlParamRaw.startsWith('//')) + urlParamRaw = 'https:' + urlParamRaw; + + let urlParam: URL; + try { + urlParam = new URL(urlParamRaw); + } catch(ex) { + return new Response('{"error":"metadata:uri"}', { status: 400, headers }); + } + + urlParamRaw = urlParam.toString(); + + const urlHash = encodeBase64Url( + await crypto.subtle.digest('SHA-256', new TextEncoder().encode(urlParamRaw)) + ); + const cacheKey = `uiharu:metadata:${urlHash}`; + // const cacheInfo = await cache.get(cacheKey); + // if(cacheInfo !== undefined) + // return new Response( + // brotliDecompressSync(cacheInfo.value), + // { + // status: 200, + // headers: { + // ...headers, + // ...{ + // 'Server-Timing': `metadata;dur=${(performance.now() - started).toFixed(6)}`, + // 'X-Uiharu-State': 'cache', + // }, + // }, + // } + // ); + + try { + const json = JSON.stringify( + await extractMetadata(urlParamRaw, urlParam) + ); + + cache.set(cacheKey, brotliCompressSync(json), { + compress: false, + lifetime: 600 + }); + + return new Response(json, { + status: 200, + headers: { + ...headers, + ...{ + 'Server-Timing': `metadata;dur=${(performance.now() - started).toFixed(6)}`, + 'X-Uiharu-State': 'fresh', + }, + }, + }); + } catch(ex) { + console.error(ex); + return new Response('{"error":"metadata:lookup"}', { status: 500, headers }); + } + } + + if(url.pathname === '/metadata/batch') { + if(!['GET', 'HEAD', 'POST'].includes(req.method)) + return new Response('', { status: 405, headers }); + + return new Response('{"took":0,"results":[]}', { + headers: { + ...headers, + ...{ 'Content-Type': 'application/json' }, + }, + }); + } + + const isAudio = url.pathname === '/metadata/thumb/audio'; + const isVideo = url.pathname === '/metadata/thumb/video'; + if(isAudio || isVideo) { + if(!['HEAD', 'GET'].includes(req.method)) + return new Response('', { status: 405, headers }); + + let urlParamRaw: String = (new URLSearchParams(url.search)).get('url')?.trim() ?? ''; + if(urlParamRaw === '') + return new Response('missing url parameter', { status: 400, headers }); + + let scheme: String = ''; + try { + const urlParam = new URL(urlParamRaw); + if(typeof urlParam.protocol === 'string') + scheme = urlParam.protocol; + + urlParamRaw = urlParam.toString(); + } catch(ex) { + return new Response('invalid url parameter', { status: 400, headers }); + } + + if(!['http:', 'https:'].includes(scheme)) + return new Response('unsupported url scheme', { status: 400, headers }); + + // this seems like a terrible idea lol + const args = ['-i', urlParamRaw]; + if(isAudio) args.push('-an'); + args.push('-f'); + args.push('image2pipe'); + args.push('-c:v'); + args.push(isVideo ? 'png' : 'copy'); + args.push('-frames:v'); + args.push('1'); + args.push('-'); + + const { code, stdout, stderr } = await (new Deno.Command('ffmpeg', { + stdin: 'null', + stdout: 'piped', + stderr: 'piped', + args, + })).output(); + + if(code !== 0) { + console.error(new TextDecoder().decode(stderr)); + return new Response('decode failed', { status: 500, headers }); + } + + // TODO: bother with cache someday maybe + const thumb = stdout; + + return new Response(thumb, { + headers: { + ...headers, + ...{ + 'Content-Type': 'image/png', + 'Cache-Control': 'public, max-age=31536000, immutable', + }, + }, + }); + } + + // serving files from /public dir + if(['HEAD', 'GET'].includes(req.method)) { + const localPathPrefix = import.meta.dirname + '/public/'; + const localPathSuffix = pathNormalize(url.pathname === '/' ? '/index.html' : url.pathname); + const localPath = pathNormalize(localPathPrefix + localPathSuffix); + if(localPath.startsWith(localPathPrefix) && existsSync(localPath)) { + const mediaTypes = { + 'html': 'text/html;charset=utf-8', + 'css': 'text/css;charset=utf-8', + 'txt': 'text/plain;charset=utf-8', + 'png': 'image/png', + }; + + let mediaType: String = 'application/octet-stream'; + const dotIndex = localPathSuffix.lastIndexOf('.'); + if(dotIndex >= 0) { + const ext = localPathSuffix.substring(dotIndex + 1); + if(ext in mediaTypes) + mediaType = mediaTypes[ext]; + } + + return new Response('', { + status: 200, + headers: { + ...headers, + ...{ + 'Content-Type': mediaType, + 'X-Accel-Redirect': `/_public${localPathSuffix}`, + } + }, + }); + } + + // 404 page + return new Response('404 Not Found

404 Not Found

', { + status: 404, + headers: { + ...headers, + ...{ 'Content-Type': 'text/html;charset=utf-8' }, + }, + }); + } + + // 404 fallback + return new Response('', { + status: ['OPTIONS', 'HEAD', 'GET', 'POST'].includes(req.method) ? 404 : 405, + headers, + }); +}; + +Deno.serve({ port }, requestHandler);