diff options
| -rw-r--r-- | net/http/codes.lua | 66 | ||||
| -rw-r--r-- | net/http/parser.lua | 116 | ||||
| -rw-r--r-- | net/http/server.lua | 223 |
3 files changed, 405 insertions, 0 deletions
diff --git a/net/http/codes.lua b/net/http/codes.lua new file mode 100644 index 00000000..2e701027 --- /dev/null +++ b/net/http/codes.lua @@ -0,0 +1,66 @@ + +local response_codes = { + -- Source: http://www.iana.org/assignments/http-status-codes + -- s/^\(\d*\)\s*\(.*\S\)\s*\[RFC.*\]\s*$/^I["\1"] = "\2"; + [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"; + [226] = "IM Used"; + + [300] = "Multiple Choices"; + [301] = "Moved Permanently"; + [302] = "Found"; + [303] = "See Other"; + [304] = "Not Modified"; + [305] = "Use Proxy"; + -- The 306 status code was used in a previous version of [RFC2616], is no longer used, and the code is reserved. + [307] = "Temporary 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"; + [422] = "Unprocessable Entity"; + [423] = "Locked"; + [424] = "Failed Dependency"; + -- The 425 status code is reserved for the WebDAV advanced collections expired proposal [RFC2817] + [426] = "Upgrade Required"; + + [500] = "Internal Server Error"; + [501] = "Not Implemented"; + [502] = "Bad Gateway"; + [503] = "Service Unavailable"; + [504] = "Gateway Timeout"; + [505] = "HTTP Version Not Supported"; + [506] = "Variant Also Negotiates"; -- Experimental + [507] = "Insufficient Storage"; + [508] = "Loop Detected"; + [510] = "Not Extended"; +}; + +for k,v in pairs(response_codes) do response_codes[k] = k.." "..v; end +return setmetatable(response_codes, { __index = function(t, k) return k.." Unassigned"; end }) diff --git a/net/http/parser.lua b/net/http/parser.lua new file mode 100644 index 00000000..c98c75af --- /dev/null +++ b/net/http/parser.lua @@ -0,0 +1,116 @@ + +local tonumber = tonumber; +local assert = assert; + +local httpstream = {}; + +function httpstream.new(success_cb, error_cb, parser_type, options_cb) + local client = true; + if not parser_type or parser_type == "server" then client = false; else assert(parser_type == "client", "Invalid parser type"); end + local buf = ""; + local chunked; + local state = nil; + local packet; + local len; + local have_body; + local error; + return { + feed = function(self, data) + if error then return nil, "parse has failed"; end + if not data then -- EOF + if state and client and not len then -- reading client body until EOF + packet.body = buf; + success_cb(packet); + elseif buf ~= "" then -- unexpected EOF + error = true; return error_cb(); + end + return; + end + buf = buf..data; + while #buf > 0 do + if state == nil then -- read request + local index = buf:find("\r\n\r\n", nil, true); + if not index then return; end -- not enough data + local method, path, httpversion, status_code, reason_phrase; + local first_line; + local headers = {}; + for line in buf:sub(1,index+1):gmatch("([^\r\n]+)\r\n") do -- parse request + if first_line then + local key, val = line:match("^([^%s:]+): *(.*)$"); + if not key then error = true; return error_cb("invalid-header-line"); end -- TODO handle multi-line and invalid headers + key = key:lower(); + headers[key] = headers[key] and headers[key]..","..val or val; + else + first_line = line; + if client then + httpversion, status_code, reason_phrase = line:match("^HTTP/(1%.[01]) (%d%d%d) (.*)$"); + if not status_code then error = true; return error_cb("invalid-status-line"); end + have_body = not + ( (options_cb and options_cb().method == "HEAD") + or (status_code == 204 or status_code == 304 or status_code == 301) + or (status_code >= 100 and status_code < 200) ); + chunked = have_body and headers["transfer-encoding"] == "chunked"; + else + method, path, httpversion = line:match("^(%w+) (%S+) HTTP/(1%.[01])$"); + if not method then error = true; return error_cb("invalid-status-line"); end + path = path:gsub("^//+", "/"); -- TODO parse url more + end + end + end + len = tonumber(headers["content-length"]); -- TODO check for invalid len + if client then + -- FIXME handle '100 Continue' response (by skipping it) + if not have_body then len = 0; end + packet = { + code = status_code; + httpversion = httpversion; + headers = headers; + body = have_body and "" or nil; + -- COMPAT the properties below are deprecated + responseversion = httpversion; + responseheaders = headers; + }; + else + len = len or 0; + packet = { + method = method; + path = path; + httpversion = httpversion; + headers = headers; + body = nil; + }; + end + buf = buf:sub(index + 4); + state = true; + end + if state then -- read body + if client then + if chunked then + local index = buf:find("\r\n", nil, true); + if not index then return; end -- not enough data + local chunk_size = buf:match("^%x+"); + if not chunk_size then error = true; return error_cb("invalid-chunk-size"); end + chunk_size = tonumber(chunk_size, 16); + index = index + 2; + if chunk_size == 0 then + state = nil; success_cb(packet); + elseif #buf - index + 1 >= chunk_size then -- we have a chunk + packet.body = packet.body..buf:sub(index, index + chunk_size - 1); + buf = buf:sub(index + chunk_size); + end + error("trailers"); -- FIXME MUST read trailers + elseif len and #buf >= len then + packet.body, buf = buf:sub(1, len), buf:sub(len + 1); + state = nil; success_cb(packet); + end + elseif #buf >= len then + packet.body, buf = buf:sub(1, len), buf:sub(len + 1); + state = nil; success_cb(packet); + end + end + end + end; + }; +end + +return httpstream; diff --git a/net/http/server.lua b/net/http/server.lua new file mode 100644 index 00000000..788f046b --- /dev/null +++ b/net/http/server.lua @@ -0,0 +1,223 @@ + +local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat; +local parser_new = require "net.http.parser".new; +local events = require "util.events".new(); +local addserver = require "net.server".addserver; +local log = require "util.logger".init("http.server"); +local os_date = os.date; +local pairs = pairs; +local s_upper = string.upper; +local setmetatable = setmetatable; +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 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 + +function listener.onconnect(conn) + local secure = conn:ssl() and true or nil; + local pending = {}; + local waiting = false; + local function process_next(last_response) + --if waiting then log("debug", "can't process_next, waiting"); return; end + if sessions[conn] and #pending > 0 then + local request = t_remove(pending); + --log("debug", "process_next: %s", request.path); + waiting = true; + --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:close(); + end + else + --log("debug", "ready for more"); + waiting = false; + end + end + local function success_cb(request) + --log("debug", "success_cb: %s", request.path); + request.secure = secure; + t_insert(pending, request); + if not waiting then + process_next(); + end + end + local function error_cb(err) + log("debug", "error_cb: %s", err or "<nil>"); + -- FIXME don't close immediately, wait until we process current stuff + -- FIXME if err, send off a bad-request response + sessions[conn] = nil; + conn:close(); + end + sessions[conn] = parser_new(success_cb, error_cb); +end + +function listener.ondisconnect(conn) + sessions[conn] = nil; +end + +function listener.onincoming(conn, data) + sessions[conn]:feed(data); +end + +local headerfix = setmetatable({}, { + __index = function(t, k) + local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": "; + t[k] = v; + return v; + end +}); + +function _M.hijack_response(response, listener) + error("TODO"); +end +function handle_request(conn, request, finish_cb) + --log("debug", "handler: %s", request.path); + local headers = {}; + for k,v in pairs(request.headers) do headers[k:gsub("-", "_")] = v; end + request.headers = headers; + request.conn = conn; + + local date_header = os_date('!%a, %d %b %Y %H:%M:%S GMT'); -- FIXME use + local conn_header = request.headers.connection; + local keep_alive = conn_header == "Keep-Alive" or (request.httpversion == "1.1" and conn_header ~= "close"); + + local response = { + request = request; + status_code = 200; + headers = { date = date_header, connection = (keep_alive and "Keep-Alive" or "close") }; + conn = conn; + send = _M.send_response; + finish_cb = finish_cb; + }; + + 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 + end + + -- if handler not called, fallback to legacy httpserver handlers + _M.legacy_handler(request, response); + end +end +function _M.send_response(response, body) + local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]); + local headers = response.headers; + body = body or ""; + headers.content_length = #body; + + local output = { status_line }; + for k,v in pairs(headers) do + t_insert(output, headerfix[k]..v); + end + t_insert(output, "\r\n\r\n"); + t_insert(output, body); + + response.conn:write(t_concat(output)); + 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 +function _M.remove_handler(event, handler) + events.remove_handler(event, handler); +end + +function _M.listen_on(port, interface, ssl) + addserver(interface or "*", port, listener, "*a", ssl); +end + +_M.listener = listener; +_M.codes = codes; +return _M; |