File

net/http/errors.lua @ 11395:d336b28b4002

mod_http_errors: Style tweak Weird to have the background all the way to the edge of the viewport. Would be nice if this could be done without the extra span.
author Kim Alvefur <zash@zash.se>
date Sun, 21 Feb 2021 07:59:17 +0100
parent 11225:8c17c08d100e
child 12974:ba409c67353b
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-- This module returns a table that is suitable for use as a util.error registry,
-- and a function to return a util.error object given callback 'code' and 'body'
-- parameters.

local codes = require "net.http.codes";
local util_error = require "util.error";

local error_templates = {
	-- This code is used by us to report a client-side or connection error.
	-- Instead of using the code, use the supplied body text to get one of
	-- the more detailed errors below.
	[0] = {
		code = 0, type = "cancel", condition = "internal-server-error";
		text = "Connection or internal error";
	};

	-- These are net.http built-in errors, they are returned in
	-- the body parameter when code == 0
	["cancelled"] = {
		code = 0, type = "cancel", condition = "remote-server-timeout";
		text = "Request cancelled";
	};
	["connection-closed"] = {
		code = 0, type = "wait", condition = "remote-server-timeout";
		text = "Connection closed";
	};
	["certificate-chain-invalid"] = {
		code = 0, type = "cancel", condition = "remote-server-timeout";
		text = "Server certificate not trusted";
	};
	["certificate-verify-failed"] = {
		code = 0, type = "cancel", condition = "remote-server-timeout";
		text = "Server certificate invalid";
	};
	["connection failed"] = {
		code = 0, type = "cancel", condition = "remote-server-not-found";
		text = "Connection failed";
	};
	["invalid-url"] = {
		code = 0, type = "modify", condition = "bad-request";
		text = "Invalid URL";
	};
	["unable to resolve service"] = {
		code = 0, type = "cancel", condition = "remote-server-not-found";
		text = "DNS resolution failed";
	};

	-- This doesn't attempt to map every single HTTP code (not all have sane mappings),
	-- but all the common ones should be covered. XEP-0086 was used as reference for
	-- most of these.
	[400] = { type = "modify", condition = "bad-request" };
	[401] = { type = "auth", condition = "not-authorized" };
	[402] = { type = "auth", condition = "payment-required" };
	[403] = { type = "auth", condition = "forbidden" };
	[404] = { type = "cancel", condition = "item-not-found" };
	[405] = { type = "cancel", condition = "not-allowed" };
	[406] = { type = "modify", condition = "not-acceptable" };
	[407] = { type = "auth", condition = "registration-required" };
	[408] = { type = "wait", condition = "remote-server-timeout" };
	[409] = { type = "cancel", condition = "conflict" };
	[410] = { type = "cancel", condition = "gone" };
	[411] = { type = "modify", condition = "bad-request" };
	[412] = { type = "cancel", condition = "conflict" };
	[413] = { type = "modify", condition = "resource-constraint" };
	[414] = { type = "modify", condition = "resource-constraint" };
	[415] = { type = "cancel", condition = "feature-not-implemented" };
	[416] = { type = "modify", condition = "bad-request" };

	[422] = { type = "modify", condition = "bad-request" };
	[423] = { type = "wait", condition = "resource-constraint" };

	[429] = { type = "wait", condition = "resource-constraint" };
	[431] = { type = "modify", condition = "resource-constraint" };
	[451] = { type = "auth", condition = "forbidden" };

	[500] = { type = "wait", condition = "internal-server-error" };
	[501] = { type = "cancel", condition = "feature-not-implemented" };
	[502] = { type = "wait", condition = "remote-server-timeout" };
	[503] = { type = "cancel", condition = "service-unavailable" };
	[504] = { type = "wait", condition = "remote-server-timeout" };
	[507] = { type = "wait", condition = "resource-constraint" };
	[511] = { type = "auth", condition = "not-authorized" };
};

for k, v in pairs(codes) do
	if error_templates[k] then
		error_templates[k].code = k;
		error_templates[k].text = v;
	else
		error_templates[k] = { type = "cancel", condition = "undefined-condition", text = v, code = k };
	end
end

setmetatable(error_templates, {
	__index = function(_, k)
		if type(k) ~= "number" then
			return nil;
		end
		return {
			type = "cancel";
			condition = "undefined-condition";
			text = codes[k] or (k.." Unassigned");
			code = k;
		};
	end
});

local function new(code, body, context)
	if code == 0 then
		return util_error.new(body, context, error_templates);
	else
		return util_error.new(code, context, error_templates);
	end
end

return {
	registry = error_templates;
	new = new;
};