Response = {
	status: int, 
	body: Buffer, 
	headers: Map
};

status_table = {
	100: "Continue",
	101: "Switching Protocols",
	102: "Processing",

	200: "OK",
	201: "Created",
	202: "Accepted",
	203: "Non-Authoritative Information",
	204: "No Content",
	205: "Reset Content",
	206: "Partial Content",
	207: "Multi-Status",
	208: "Already Reported",

	300: "Multiple Choices",
	301: "Moved Permanently",
	302: "Found",
	303: "See Other",
	304: "Not Modified",
	305: "Use Proxy",
	306: "Switch Proxy",
	307: "Temporary Redirect",
	308: "Permanent Redirect",

	400: "Bad Request",
	401: "Unauthorized",
	402: "Payment Required",
	403: "Forbidden",
	404: "Not Found",
	405: "Method Not Allowed",
	406: "Not Acceptable",
	407: "Proxy Authentication Required",
	408: "Request Timeout",
	409: "Conflict",
	410: "Gone",
	411: "Length Required",
	412: "Precondition Failed",
	413: "Request Entity Too Large",
	414: "Request-URI Too Long",
	415: "Unsupported Media Type",
	416: "Requested Range Not Satisfiable",
	417: "Expectation Failed",
	418: "I'm a teapot",
	420: "Enhance your calm",
	422: "Unprocessable Entity",
	426: "Upgrade Required",
	429: "Too many requests",
	431: "Request Header Fields Too Large",
	449: "Retry With",
	451: "Unavailable For Legal Reasons",

	500: "Internal Server Error",
	501: "Not Implemented",
	502: "Bad Gateway",
	503: "Service Unavailable",
	504: "Gateway Timeout",
	505: "HTTP Version Not Supported",
	509: "Bandwidth Limit Exceeded"
};

fun getStatusText(code: int) {
	text = status_table[code];
	if text == none:
		return "???";
	return text;
}

fun new(status: int = 200, 
		body: Buffer | String = "", 
		headers: Map = {}) {
	
	if type(body) == String:
		body = buffer.fromString(body);

	# It's important to cast the body from a
	# string to a buffer before calculating
	# the Content-Length because the count of
	# a string doesn't necessarily match the
	# number of bytes!
	headers['Content-Length'] = count(body);

	return {status: status, body: body, headers: headers};
}

fun toBuffer(res: Response) {

	cat = string.cat;
	text = cat("HTTP/1.0 ", toString(res.status), " ", getStatusText(res.status), "\r\n");
	
	i = 0;
	header_names = keysof(res.headers);
	while i < count(header_names): {
		name = header_names[i];
		body = toString(res.headers[name]);
		text = cat(text, name, ": ", body, "\r\n");
		i = i+1;
	}
	text = cat(text, "\r\n", buffer.toString(res.body));
	return buffer.fromString(text);
}

fun toSocket(fd: int, res: Response) {
	buf = toBuffer(res);
	_, error = net.send(fd, buf);
	return error;
}