${title}

-- SPDX-FileCopyrightText: © 2022—2026 Vladimir Zorin -- SPDX-License-Identifier: LicenseRef-OWL-1.0-or-later -- Licensed under OWL v1.0+. See LICENSE. local std = require("std") local markdown = require("markdown") local template = { head = [[ ${title} ]], body = [[

${title}

]], footer = "", error_section = [[

${error_code}

${error_message}

${error_code}

${img}

Take me home, country roads...

]], error_404_footer = [[]], errors = { [401] = { title = "Unauthorized", msg = "Your papers expired three weeks ago!" }, [403] = { title = "Forbidden", msg = { "You are too ugly to get in.", "Beat it.", "Take a hike, Mike." } }, [404] = { title = "Page Not Found", msg = { "You must be coming from AltaVista, right?", "Elvis has left the building, baby.", "Paginam perdidi.", "Pagina niet gevonden. Wie vult dat lege gat?...", "The train has long been gone.", "Oh, this overwhelming sense of loss...", "Nope, no such page. Why are you looking for it, anyway? What is it, your relative? Who told you to go looking for pages on the internet?! Some people have no shame!", "I think I saw that page somewhere...Might be over the sofa...", "Oops. No page found. That's sad.", }, }, [405] = { title = "Method Not Allowed", msg = { "Hey! Looky, no touchy.", "This ain't a POST Office, mate." } }, [429] = { title = "Too Many Requests", msg = { "You better slow down before it gets ugly, I'm warning you!", "Take a pause for the cause, will ya?", "Pēdīcābo ego vōs et irrumābō!", "Quo usque tandem abutere, Catilina, patientia nostra?", }, }, [503] = { title = "Service Unavailable", msg = "Sad days." }, [501] = { title = "Not Implemented", msg = "You can't implement everything, can you?" }, [500] = { title = "Internal Server Error", msg = { "I'm feeling sick. I hope it's not smallpox again...", "Sometimes you just can't go on...I mean what's the point? There is no meaning in anything", "Things break.", "Nobody knows the troubles I've seen...", }, }, }, } local error_page = function(code, hit_count, user_tmpl, img) local user_tmpl = user_tmpl or {} local vars = { title = "Unknown error", css_file = "/css/default.css", favicon_file = "/images/error/favicon.svg", hit_count = hit_count or 0, error_message = "Never seen such a thing in my life!", error_code = code, class = "error", img = img or "", } local tmpl = std.tbl.copy(template) tmpl = std.tbl.merge(tmpl, user_tmpl) if tmpl.errors[code] then local msg if type(tmpl.errors[code].msg) == "table" then msg = tmpl.errors[code].msg[math.random(1, #tmpl.errors[code].msg)] else msg = tmpl.errors[code].msg end vars.title = tmpl.errors[code].title vars.error_message = msg end if code == 404 then return std.txt.template( -- I wonder if it's worth to use string.buffer here... tmpl.head .. tmpl.body .. tmpl.error_section .. tmpl.error_404_footer .. tmpl.footer, vars ) end return std.txt.template(tmpl.head .. tmpl.body .. tmpl.error_section .. tmpl.footer, vars) end local markdown_to_html = function(content) local html = markdown.render_html(content) if not html then return nil end local h1_inner = html:match("]*>(.-)") if h1_inner then local title = h1_inner:gsub("<[^>]+>", ""):gsub("^%s+", ""):gsub("%s+$", "") html = html:gsub("]*>.-%s*", "", 1) return html, title end return html end local render_page = function(content, vars, user_tmpl) local vars = vars or {} local user_tmpl = user_tmpl or {} local tmpl = std.tbl.copy(template) tmpl = std.tbl.merge(tmpl, user_tmpl) local page_header = tmpl.head .. tmpl.body if not vars.css_file then page_header = page_header:gsub('%s+', "") end if not vars.favicon_file then page_header = page_header:gsub('%s+', "") end return std.txt.template(page_header, vars) .. content .. std.txt.template(tmpl.footer, vars) end return { error_page = error_page, markdown_to_html = markdown_to_html, render_page = render_page, }