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-rw-r--r--net/http/server.lua222
1 files changed, 136 insertions, 86 deletions
diff --git a/net/http/server.lua b/net/http/server.lua
index 788f046b..69908e4e 100644
--- a/net/http/server.lua
+++ b/net/http/server.lua
@@ -12,25 +12,83 @@ local xpcall = xpcall;
local debug = debug;
local tostring = tostring;
local codes = require "net.http.codes";
-local _G = _G;
local _M = {};
local sessions = {};
-local handlers = {};
-
local listener = {};
+local hosts = {};
+local default_host;
+
+local function is_wildcard_event(event)
+ return event:sub(-2, -1) == "/*";
+end
+local function is_wildcard_match(wildcard_event, event)
+ return wildcard_event:sub(1, -2) == event:sub(1, #wildcard_event-1);
+end
+
+local event_map = events._event_map;
+setmetatable(events._handlers, {
+ __index = function (handlers, curr_event)
+ if is_wildcard_event(curr_event) then return; end -- Wildcard events cannot be fired
+ -- Find all handlers that could match this event, sort them
+ -- and then put the array into handlers[curr_event] (and return it)
+ local matching_handlers_set = {};
+ local handlers_array = {};
+ for event, handlers_set in pairs(event_map) do
+ if event == curr_event or
+ is_wildcard_event(event) and is_wildcard_match(event, curr_event) then
+ for handler, priority in pairs(handlers_set) do
+ matching_handlers_set[handler] = { (select(2, event:gsub("/", "%1"))), is_wildcard_event(event) and 0 or 1, priority };
+ table.insert(handlers_array, handler);
+ end
+ end
+ end
+ if #handlers_array > 0 then
+ table.sort(handlers_array, function(b, a)
+ local a_score, b_score = matching_handlers_set[a], matching_handlers_set[b];
+ for i = 1, #a_score do
+ if a_score[i] ~= b_score[i] then -- If equal, compare next score value
+ return a_score[i] < b_score[i];
+ end
+ end
+ return false;
+ end);
+ else
+ handlers_array = false;
+ end
+ rawset(handlers, curr_event, handlers_array);
+ return handlers_array;
+ end;
+ __newindex = function (handlers, curr_event, handlers_array)
+ if handlers_array == nil
+ and is_wildcard_event(curr_event) then
+ -- Invalidate the indexes of all matching events
+ for event in pairs(handlers) do
+ if is_wildcard_match(curr_event, event) then
+ handlers[event] = nil;
+ end
+ end
+ end
+ rawset(handlers, curr_event, handlers_array);
+ end;
+});
local handle_request;
local _1, _2, _3;
local function _handle_request() return handle_request(_1, _2, _3); end
-local function _traceback_handler(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug.traceback()); end
+
+local last_err;
+local function _traceback_handler(err) last_err = err; log("error", "Traceback[http]: %s: %s", tostring(err), debug.traceback()); end
+events.add_handler("http-error", function (error)
+ return "Error processing request: "..codes[error.code]..". Check your error log for more information.";
+end, -1);
function listener.onconnect(conn)
local secure = conn:ssl() and true or nil;
local pending = {};
local waiting = false;
- local function process_next(last_response)
+ local function process_next()
--if waiting then log("debug", "can't process_next, waiting"); return; end
if sessions[conn] and #pending > 0 then
local request = t_remove(pending);
@@ -39,7 +97,7 @@ function listener.onconnect(conn)
--handle_request(conn, request, process_next);
_1, _2, _3 = conn, request, process_next;
if not xpcall(_handle_request, _traceback_handler) then
- conn:write("HTTP/1.0 503 Internal Server Error\r\n\r\nAn error occured during the processing of this request.");
+ conn:write("HTTP/1.0 500 Internal Server Error\r\n\r\n"..events.fire_event("http-error", { code = 500, private_message = last_err }));
conn:close();
end
else
@@ -66,6 +124,11 @@ function listener.onconnect(conn)
end
function listener.ondisconnect(conn)
+ local open_response = conn._http_open_response;
+ if open_response and open_response.on_destroy then
+ open_response.finished = true;
+ open_response:on_destroy();
+ end
sessions[conn] = nil;
end
@@ -103,42 +166,67 @@ function handle_request(conn, request, finish_cb)
send = _M.send_response;
finish_cb = finish_cb;
};
+ conn._http_open_response = response;
- if not request.headers.host then
- response.status_code = 400;
- response.headers.content_type = "text/html";
- response:send("<html><head>400 Bad Request</head><body>400 Bad Request: No Host header.</body></html>");
- else
- -- TODO call handler
- --response.headers.content_type = "text/plain";
- --response:send("host="..(request.headers.host or "").."\npath="..request.path.."\n"..(request.body or ""));
- local host = request.headers.host;
- if host then
- host = host:match("[^:]*"):lower();
- local event = request.method.." "..host..request.path:match("[^?]*");
- local payload = { request = request, response = response };
- --[[repeat
- if events.fire_event(event, payload) ~= nil then return; end
- event = (event:sub(-1) == "/") and event:sub(1, -1) or event:gsub("[^/]*$", "");
- if event:sub(-1) == "/" then
- event = event:sub(1, -1);
- else
- event = event:gsub("[^/]*$", "");
- end
- until not event:find("/", 1, true);]]
- --log("debug", "Event: %s", event);
- if events.fire_event(event, payload) ~= nil then return; end
- -- TODO try adding/stripping / at the end, but this needs to work via an HTTP redirect
+ local host = (request.headers.host or ""):match("[^:]+");
+
+ -- Some sanity checking
+ local err_code, err;
+ if not request.path then
+ err_code, err = 400, "Invalid path";
+ elseif not hosts[host] then
+ if hosts[default_host] then
+ host = default_host;
+ elseif host then
+ err_code, err = 404, "Unknown host: "..host;
+ else
+ err_code, err = 400, "Missing or invalid 'Host' header";
end
+ end
+
+ if err then
+ response.status_code = err_code;
+ response:send(events.fire_event("http-error", { code = err_code, message = err }));
+ return;
+ end
- -- if handler not called, fallback to legacy httpserver handlers
- _M.legacy_handler(request, response);
+ local event = request.method.." "..host..request.path:match("[^?]*");
+ local payload = { request = request, response = response };
+ --log("debug", "Firing event: %s", event);
+ local result = events.fire_event(event, payload);
+ if result ~= nil then
+ if result ~= true then
+ local body;
+ local result_type = type(result);
+ if result_type == "number" then
+ response.status_code = result;
+ if result >= 400 then
+ body = events.fire_event("http-error", { code = result });
+ end
+ elseif result_type == "string" then
+ body = result;
+ elseif result_type == "table" then
+ for k, v in pairs(result) do
+ response[k] = v;
+ end
+ end
+ response:send(body);
+ end
+ return;
end
+
+ -- if handler not called, return 404
+ response.status_code = 404;
+ response:send(events.fire_event("http-error", { code = 404 }));
end
function _M.send_response(response, body)
+ if response.finished then return; end
+ response.finished = true;
+ response.conn._http_open_response = nil;
+
local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]);
local headers = response.headers;
- body = body or "";
+ body = body or response.body or "";
headers.content_length = #body;
local output = { status_line };
@@ -149,64 +237,16 @@ function _M.send_response(response, body)
t_insert(output, body);
response.conn:write(t_concat(output));
+ if response.on_destroy then
+ response:on_destroy();
+ response.on_destroy = nil;
+ end
if headers.connection == "Keep-Alive" then
response:finish_cb();
else
response.conn:close();
end
end
-function _M.legacy_handler(request, response)
- log("debug", "Invoking legacy handler");
- local base = request.path:match("^/([^/?]+)");
- local legacy_server = _G.httpserver and _G.httpserver.new.http_servers[5280];
- local handler = legacy_server and legacy_server.handlers[base];
- if not handler then handler = _G.httpserver and _G.httpserver.set_default_handler.default_handler; end
- if handler then
- -- add legacy properties to request object
- request.url = { path = request.path };
- request.handler = response.conn;
- request.id = tostring{}:match("%x+$");
- local headers = {};
- for k,v in pairs(request.headers) do
- headers[k:gsub("_", "-")] = v;
- end
- request.headers = headers;
- function request:send(resp)
- if self.destroyed then return; end
- if resp.body or resp.headers then
- if resp.headers then
- for k,v in pairs(resp.headers) do response.headers[k] = v; end
- end
- response:send(resp.body)
- else
- response:send(resp)
- end
- self.sent = true;
- self:destroy();
- end
- function request:destroy()
- if self.destroyed then return; end
- if not self.sent then return self:send(""); end
- self.destroyed = true;
- if self.on_destroy then
- log("debug", "Request has destroy callback");
- self:on_destroy();
- else
- log("debug", "Request has no destroy callback");
- end
- end
- local r = handler(request.method, request.body, request);
- if r ~= true then
- request:send(r);
- end
- else
- log("debug", "No handler found");
- response.status_code = 404;
- response.headers.content_type = "text/html";
- response:send("<html><head>404 Not Found</head><body>404 Not Found: No such page.</body></html>");
- end
-end
-
function _M.add_handler(event, handler, priority)
events.add_handler(event, handler, priority);
end
@@ -217,7 +257,17 @@ end
function _M.listen_on(port, interface, ssl)
addserver(interface or "*", port, listener, "*a", ssl);
end
+function _M.add_host(host)
+ hosts[host] = true;
+end
+function _M.remove_host(host)
+ hosts[host] = nil;
+end
+function _M.set_default_host(host)
+ default_host = host;
+end
_M.listener = listener;
_M.codes = codes;
+_M._events = events;
return _M;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 11:22:30 +0000