local response_codes = {

	-- Source: http://www.iana.org/assignments/http-status-codes

	[100] = "Continue"; -- RFC7231, Section 6.2.1

	[101] = "Switching Protocols"; -- RFC7231, Section 6.2.2

	[102] = "Processing";

	[103] = "Early Hints";

	-- [104-199] = "Unassigned";

	[200] = "OK"; -- RFC7231, Section 6.3.1

	[201] = "Created"; -- RFC7231, Section 6.3.2

	[202] = "Accepted"; -- RFC7231, Section 6.3.3

	[203] = "Non-Authoritative Information"; -- RFC7231, Section 6.3.4

	[204] = "No Content"; -- RFC7231, Section 6.3.5

	[205] = "Reset Content"; -- RFC7231, Section 6.3.6

	[206] = "Partial Content"; -- RFC7233, Section 4.1

	[207] = "Multi-Status";

	[208] = "Already Reported";

	-- [209-225] = "Unassigned";

	[226] = "IM Used";

	-- [227-299] = "Unassigned";

	[300] = "Multiple Choices"; -- RFC7231, Section 6.4.1

	[301] = "Moved Permanently"; -- RFC7231, Section 6.4.2

	[302] = "Found"; -- RFC7231, Section 6.4.3

	[303] = "See Other"; -- RFC7231, Section 6.4.4

	[304] = "Not Modified"; -- RFC7232, Section 4.1

	[305] = "Use Proxy"; -- RFC7231, Section 6.4.5

	-- [306] = "(Unused)"; -- RFC7231, Section 6.4.6

	[307] = "Temporary Redirect"; -- RFC7231, Section 6.4.7

	[308] = "Permanent Redirect";

	-- [309-399] = "Unassigned";

	[400] = "Bad Request"; -- RFC7231, Section 6.5.1

	[401] = "Unauthorized"; -- RFC7235, Section 3.1

	[402] = "Payment Required"; -- RFC7231, Section 6.5.2

	[403] = "Forbidden"; -- RFC7231, Section 6.5.3

	[404] = "Not Found"; -- RFC7231, Section 6.5.4

	[405] = "Method Not Allowed"; -- RFC7231, Section 6.5.5

	[406] = "Not Acceptable"; -- RFC7231, Section 6.5.6

	[407] = "Proxy Authentication Required"; -- RFC7235, Section 3.2

	[408] = "Request Timeout"; -- RFC7231, Section 6.5.7

	[409] = "Conflict"; -- RFC7231, Section 6.5.8

	[410] = "Gone"; -- RFC7231, Section 6.5.9

	[411] = "Length Required"; -- RFC7231, Section 6.5.10

	[412] = "Precondition Failed"; -- RFC7232, Section 4.2

	[413] = "Payload Too Large"; -- RFC7231, Section 6.5.11

	[414] = "URI Too Long"; -- RFC7231, Section 6.5.12

	[415] = "Unsupported Media Type"; -- RFC7231, Section 6.5.13

	[416] = "Range Not Satisfiable"; -- RFC7233, Section 4.4

	[417] = "Expectation Failed"; -- RFC7231, Section 6.5.14

	[418] = "I'm a teapot"; -- RFC2324, Section 2.3.2

	-- [419-420] = "Unassigned";

	[421] = "Misdirected Request"; -- RFC7540, Section 9.1.2

	[422] = "Unprocessable Entity";

	[423] = "Locked";

	[424] = "Failed Dependency";

	[425] = "Too Early";

	[426] = "Upgrade Required"; -- RFC7231, Section 6.5.15

	-- [427] = "Unassigned";

	[428] = "Precondition Required";

	[429] = "Too Many Requests";

	-- [430] = "Unassigned";

	[431] = "Request Header Fields Too Large";

	-- [432-450] = "Unassigned";

	[451] = "Unavailable For Legal Reasons";

	-- [452-499] = "Unassigned";

	[500] = "Internal Server Error"; -- RFC7231, Section 6.6.1

	[501] = "Not Implemented"; -- RFC7231, Section 6.6.2

	[502] = "Bad Gateway"; -- RFC7231, Section 6.6.3

	[503] = "Service Unavailable"; -- RFC7231, Section 6.6.4

	[504] = "Gateway Timeout"; -- RFC7231, Section 6.6.5

	[505] = "HTTP Version Not Supported"; -- RFC7231, Section 6.6.6

	[506] = "Variant Also Negotiates";

	[507] = "Insufficient Storage";

	[508] = "Loop Detected";

	-- [509] = "Unassigned";

	[510] = "Not Extended";

	[511] = "Network Authentication Required";

	-- [512-599] = "Unassigned";

};

for k,v in pairs(response_codes) do response_codes[k] = ("%03d %s"):format(k, v); end

return setmetatable(response_codes, { __index = function(_, k) return k.." Unassigned"; end })