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-- Generate util/dnsregistry.lua from IANA HTTP status code registry
local xml = require "util.xml";
local registries = xml.parse(io.read("*a"), { allow_processing_instructions = true });
print("-- Source: https://www.iana.org/assignments/dns-parameters/dns-parameters.xml");
print(os.date("-- Generated on %Y-%m-%d"))
local registry_mapping = {
["dns-parameters-2"] = "classes";
["dns-parameters-4"] = "types";
["dns-parameters-6"] = "errors";
};
print("return {");
for registry in registries:childtags("registry") do
local registry_name = registry_mapping[registry.attr.id];
if registry_name then
print("\t" .. registry_name .. " = {");
for record in registry:childtags("record") do
local record_name = record:get_child_text("name");
local record_type = record:get_child_text("type");
local record_desc = record:get_child_text("description");
local record_code = tonumber(record:get_child_text("value"));
if tostring(record):lower():match("reserved") or tostring(record):lower():match("unassigned") then
record_code = nil;
end
if registry_name == "classes" and record_code then
record_type = record_desc and record_desc:match("%((%w+)%)$")
if record_type then
print(("\t\t[%q] = %d; [%d] = %q;"):format(record_type, record_code, record_code, record_type))
end
elseif registry_name == "types" and record_type and record_code then
print(("\t\t[%q] = %d; [%d] = %q;"):format(record_type, record_code, record_code, record_type))
elseif registry_name == "errors" and record_code and record_name then
print(("\t\t[%d] = %q; [%q] = %q;"):format(record_code, record_name, record_name, record_desc or record_name));
end
end
print("\t};");
end
end
print("};");
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