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https://github.com/bjc/prosody.git
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39cb7aabe0
Per the unspoken internal standard of -1 as priority for most built-in event handlers, since this makes it easy for 3rd party plugins to override behavior by hooking at the default priority of 0.
111 lines
3.9 KiB
Lua
111 lines
3.9 KiB
Lua
module:set_global();
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local server = require "net.http.server";
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local codes = require "net.http.codes";
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local xml_escape = require "util.stanza".xml_escape;
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local render = require "util.interpolation".new("%b{}", xml_escape);
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local show_private = module:get_option_boolean("http_errors_detailed", false);
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local always_serve = module:get_option_boolean("http_errors_always_show", true);
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local default_message = { module:get_option_string("http_errors_default_message", "That's all I know.") };
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local default_messages = {
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[400] = { "What kind of request do you call that??" };
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[403] = { "You're not allowed to do that." };
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[404] = { "Whatever you were looking for is not here. %";
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"Where did you put it?", "It's behind you.", "Keep looking." };
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[500] = { "% Check your error log for more info.";
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"Gremlins.", "It broke.", "Don't look at me." };
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["/"] = {
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"A study in simplicity.";
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"Better catch it!";
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"Don't just stand there, go after it!";
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"Well, say something, before it runs too far!";
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"Welcome to the world of XMPP!";
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"You can do anything in XMPP!"; -- "The only limit is XML.";
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"You can do anything with Prosody!"; -- the only limit is memory?
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};
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};
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local messages = setmetatable(module:get_option("http_errors_messages", {}), { __index = default_messages });
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local html = [[
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>{title}</title>
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<style>
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body{margin-top:14%;text-align:center;background-color:#f8f8f8;font-family:sans-serif}
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h1{font-size:xx-large}
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p{font-size:x-large}
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p.warning>span{font-size:large;background-color:yellow}
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p.extra{font-size:large;font-family:courier}
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@media(prefers-color-scheme:dark){
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body{background-color:#161616;color:#eee}
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p.warning>span{background-color:inherit;color:yellow}
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}
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</style>
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</head>
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<body>
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<h1>{icon?{icon_raw!?}} {title}</h1>
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<p>{message}</p>
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{warning&<p class="warning"><span>⚠ {warning?} ⚠</span></p>}
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{extra&<p class="extra">{extra?}</p>}
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</body>
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</html>
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]];
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local function get_page(code, extra)
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local message = messages[code];
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if always_serve or message then
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message = message or default_message;
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return render(html, {
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title = rawget(codes, code) or ("Code "..tostring(code));
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message = message[1]:gsub("%%", function ()
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return message[math.random(2, math.max(#message,2))];
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end);
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extra = extra;
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});
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end
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end
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-- Main error page handler
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module:hook_object_event(server, "http-error", function (event)
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if event.response then
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event.response.headers.content_type = "text/html; charset=utf-8";
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end
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return get_page(event.code, (show_private and event.private_message) or event.message or (event.error and event.error.text));
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end);
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-- Way to use the template for other things so to give a consistent appearance
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module:hook("http-message", function (event)
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if event.response then
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event.response.headers.content_type = "text/html; charset=utf-8";
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end
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return render(html, event);
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end, -1);
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local icon = [[
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<svg xmlns="http://www.w3.org/2000/svg" height="0.7em" viewBox="0 0 480 480" width="0.7em">
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<rect fill="#6197df" height="220" rx="60" ry="60" width="220" x="10" y="10"></rect>
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<rect fill="#f29b00" height="220" rx="60" ry="60" width="220" x="10" y="240"></rect>
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<rect fill="#f29b00" height="220" rx="60" ry="60" width="220" x="240" y="10"></rect>
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<rect fill="#6197df" height="220" rx="60" ry="60" width="220" x="240" y="240"></rect>
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</svg>
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]];
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-- Something nicer shown instead of 404 at the root path, if nothing else handles this path
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module:hook_object_event(server, "http-error", function (event)
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local request, response = event.request, event.response;
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if request and response and request.path == "/" and response.status_code == 404 then
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response.status_code = 200;
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response.headers.content_type = "text/html; charset=utf-8";
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local message = messages["/"];
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return render(html, {
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icon_raw = icon,
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title = "Prosody is running!";
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message = message[math.random(#message)];
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});
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end
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end, 1);
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