diff --git a/src/hooks/dcs-fiddle-server.lua b/src/hooks/dcs-fiddle-server.lua index 25baf66..c49314c 100644 --- a/src/hooks/dcs-fiddle-server.lua +++ b/src/hooks/dcs-fiddle-server.lua @@ -1,6 +1,3 @@ --- Note: This is a modified version of the DCS Fiddle Server to add authentication for public servers. --- All credit goes to the original authors of DCS Fiddle: JonathanTurnock and john681611 - FIDDLE = {} -- Configs: @@ -10,430 +7,6 @@ FIDDLE.USERNAME = 'username' FIDDLE.PASSWORD = 'password' FIDDLE.BIND_IP = '0.0.0.0' -- for remote access FIDDLE.BYPASS_LOCAL = true -- allow requests to 127.0.0.1:12080 without auth, so DCS Fiddle website can still work. (Not a very secure implementation. Use at your own risk if your 12080 port is public) ---[[ -Custom JSON Serialization Module that handles DCS' usage of integers as table keys such as {[1]=1, ["name"]="Enfield11", [2]=1, [3]=1} which is not valid json - -This is handled by encoding tables with mixed key types as objects so the above example would be - -{ - "_1": 1, - "_2": 1, - "name": "Enfield11", - "_3": 1 -} - -Anything that is clearly a table is still converted to a table - -]]-- - -fiddlejson = { _version = "0.2.0" } - -------------------------------------------------------------------------------- --- Encode -------------------------------------------------------------------------------- - -local encode - -local escape_char_map = { - [ "\\" ] = "\\", - [ "\"" ] = "\"", - [ "\b" ] = "b", - [ "\f" ] = "f", - [ "\n" ] = "n", - [ "\r" ] = "r", - [ "\t" ] = "t", -} - -local escape_char_map_inv = { [ "/" ] = "/" } -for k, v in pairs(escape_char_map) do - escape_char_map_inv[v] = k -end - - -local function escape_char(c) - return "\\" .. (escape_char_map[c] or string.format("u%04x", c:byte())) -end - - -local function encode_nil(val) - return "null" -end - ---- Checks if a given table is an array. --- The function verifies that all keys are numeric and sequential starting from 1. --- @param val Table to be checked. --- @return boolean Returns true if the table is an array, otherwise false. -local function is_table_array(val) - -- Check if the first element of the table is not nil or the table is empty. - -- These are two signs that the table might be an array. - if rawget(val, 1) ~= nil or next(val) == nil then - -- Extract all numeric keys and sort them. - local keys = {} - for k in pairs(val) do - if type(k) == "number" then - table.insert(keys, k) - else - -- If any key is not a number, the table is not an array. - return false - end - end - table.sort(keys) - - -- Check the sorted keys to see if they form a continuous sequence starting from 1. - for i, k in ipairs(keys) do - if i ~= k then - return false - end - end - - -- If all keys were numeric and in sequence, then the table is an array. - return true - else - -- If the first element of the table is nil and the table isn't empty, - -- then it's not an array. - return false - end -end - - -local function encode_table(val, stack) - local res = {} - stack = stack or {} - - -- Circular reference? - if stack[val] then error("circular reference") end - - stack[val] = true - - - - if is_table_array(val) then - -- Treat as array -- check keys are valid and it is not sparse - -- Encode - for i, v in ipairs(val) do - table.insert(res, encode(v, stack)) - end - stack[val] = nil - return "[" .. table.concat(res, ",") .. "]" - - else - -- Treat as an object - for k, v in pairs(val) do - if type(k) ~= "string" then - table.insert(res, encode("_"..k, stack) .. ":" .. encode(v, stack)) - else - table.insert(res, encode(k, stack) .. ":" .. encode(v, stack)) - end - end - stack[val] = nil - return "{" .. table.concat(res, ",") .. "}" - end -end - - -local function encode_string(val) - return '"' .. val:gsub('[%z\1-\31\\"]', escape_char) .. '"' -end - - -local function encode_number(val) - -- Check for NaN, -inf and inf - if val ~= val or val <= -math.huge or val >= math.huge then - error("unexpected number value '" .. tostring(val) .. "'") - end - return string.format("%.14g", val) -end - - -local type_func_map = { - [ "nil" ] = encode_nil, - [ "table" ] = encode_table, - [ "string" ] = encode_string, - [ "number" ] = encode_number, - [ "boolean" ] = tostring, -} - - -encode = function(val, stack) - local t = type(val) - local f = type_func_map[t] - if f then - return f(val, stack) - end - error("unexpected type '" .. t .. "'") -end - - -function fiddlejson.encode(val) - return ( encode(val) ) -end - - -------------------------------------------------------------------------------- --- Decode -------------------------------------------------------------------------------- - -local parse - -local function create_set(...) - local res = {} - for i = 1, select("#", ...) do - res[ select(i, ...) ] = true - end - return res -end - -local space_chars = create_set(" ", "\t", "\r", "\n") -local delim_chars = create_set(" ", "\t", "\r", "\n", "]", "}", ",") -local escape_chars = create_set("\\", "/", '"', "b", "f", "n", "r", "t", "u") -local literals = create_set("true", "false", "null") - -local literal_map = { - [ "true" ] = true, - [ "false" ] = false, - [ "null" ] = nil, -} - - -local function next_char(str, idx, set, negate) - for i = idx, #str do - if set[str:sub(i, i)] ~= negate then - return i - end - end - return #str + 1 -end - - -local function decode_error(str, idx, msg) - local line_count = 1 - local col_count = 1 - for i = 1, idx - 1 do - col_count = col_count + 1 - if str:sub(i, i) == "\n" then - line_count = line_count + 1 - col_count = 1 - end - end - error( string.format("%s at line %d col %d", msg, line_count, col_count) ) -end - - -local function codepoint_to_utf8(n) - -- http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=iws-appendixa - local f = math.floor - if n <= 0x7f then - return string.char(n) - elseif n <= 0x7ff then - return string.char(f(n / 64) + 192, n % 64 + 128) - elseif n <= 0xffff then - return string.char(f(n / 4096) + 224, f(n % 4096 / 64) + 128, n % 64 + 128) - elseif n <= 0x10ffff then - return string.char(f(n / 262144) + 240, f(n % 262144 / 4096) + 128, - f(n % 4096 / 64) + 128, n % 64 + 128) - end - error( string.format("invalid unicode codepoint '%x'", n) ) -end - - -local function parse_unicode_escape(s) - local n1 = tonumber( s:sub(1, 4), 16 ) - local n2 = tonumber( s:sub(7, 10), 16 ) - -- Surrogate pair? - if n2 then - return codepoint_to_utf8((n1 - 0xd800) * 0x400 + (n2 - 0xdc00) + 0x10000) - else - return codepoint_to_utf8(n1) - end -end - - -local function parse_string(str, i) - local res = "" - local j = i + 1 - local k = j - - while j <= #str do - local x = str:byte(j) - - if x < 32 then - decode_error(str, j, "control character in string") - - elseif x == 92 then -- `\`: Escape - res = res .. str:sub(k, j - 1) - j = j + 1 - local c = str:sub(j, j) - if c == "u" then - local hex = str:match("^[dD][89aAbB]%x%x\\u%x%x%x%x", j + 1) - or str:match("^%x%x%x%x", j + 1) - or decode_error(str, j - 1, "invalid unicode escape in string") - res = res .. parse_unicode_escape(hex) - j = j + #hex - else - if not escape_chars[c] then - decode_error(str, j - 1, "invalid escape char '" .. c .. "' in string") - end - res = res .. escape_char_map_inv[c] - end - k = j + 1 - - elseif x == 34 then -- `"`: End of string - res = res .. str:sub(k, j - 1) - return res, j + 1 - end - - j = j + 1 - end - - decode_error(str, i, "expected closing quote for string") -end - - -local function parse_number(str, i) - local x = next_char(str, i, delim_chars) - local s = str:sub(i, x - 1) - local n = tonumber(s) - if not n then - decode_error(str, i, "invalid number '" .. s .. "'") - end - return n, x -end - - -local function parse_literal(str, i) - local x = next_char(str, i, delim_chars) - local word = str:sub(i, x - 1) - if not literals[word] then - decode_error(str, i, "invalid literal '" .. word .. "'") - end - return literal_map[word], x -end - - -local function parse_array(str, i) - local res = {} - local n = 1 - i = i + 1 - while 1 do - local x - i = next_char(str, i, space_chars, true) - -- Empty / end of array? - if str:sub(i, i) == "]" then - i = i + 1 - break - end - -- Read token - x, i = parse(str, i) - res[n] = x - n = n + 1 - -- Next token - i = next_char(str, i, space_chars, true) - local chr = str:sub(i, i) - i = i + 1 - if chr == "]" then break end - if chr ~= "," then decode_error(str, i, "expected ']' or ','") end - end - return res, i -end - -function set_table(res, key, val) - -- Check if the key starts with an underscore - if string.sub(key, 1, 1) == "_" then - -- Remove the underscore and try to convert the rest to a number - local numKey = tonumber(string.sub(key, 2)) - - -- If the result is not nil, meaning the conversion was successful - if numKey then - -- Update the table with the number key instead of the string key - res[numKey] = val - end - else - -- If the key does not start with an underscore, just use it as is - res[key] = val - end -end - -local function parse_object(str, i) - local res = {} - i = i + 1 - while 1 do - local key, val - i = next_char(str, i, space_chars, true) - -- Empty / end of object? - if str:sub(i, i) == "}" then - i = i + 1 - break - end - -- Read key - if str:sub(i, i) ~= '"' then - decode_error(str, i, "expected string for key") - end - key, i = parse(str, i) - -- Read ':' delimiter - i = next_char(str, i, space_chars, true) - if str:sub(i, i) ~= ":" then - decode_error(str, i, "expected ':' after key") - end - i = next_char(str, i + 1, space_chars, true) - -- Read value - val, i = parse(str, i) - -- Set - --res[key] = val - set_table(res, key, val) - -- Next token - i = next_char(str, i, space_chars, true) - local chr = str:sub(i, i) - i = i + 1 - if chr == "}" then break end - if chr ~= "," then decode_error(str, i, "expected '}' or ','") end - end - return res, i -end - - -local char_func_map = { - [ '"' ] = parse_string, - [ "0" ] = parse_number, - [ "1" ] = parse_number, - [ "2" ] = parse_number, - [ "3" ] = parse_number, - [ "4" ] = parse_number, - [ "5" ] = parse_number, - [ "6" ] = parse_number, - [ "7" ] = parse_number, - [ "8" ] = parse_number, - [ "9" ] = parse_number, - [ "-" ] = parse_number, - [ "t" ] = parse_literal, - [ "f" ] = parse_literal, - [ "n" ] = parse_literal, - [ "[" ] = parse_array, - [ "{" ] = parse_object, -} - - -parse = function(str, idx) - local chr = str:sub(idx, idx) - local f = char_func_map[chr] - if f then - return f(str, idx) - end - decode_error(str, idx, "unexpected character '" .. chr .. "'") -end - - -function fiddlejson.decode(str) - if type(str) ~= "string" then - error("expected argument of type string, got " .. type(str)) - end - local res, idx = parse(str, next_char(str, 1, space_chars, true)) - idx = next_char(str, idx, space_chars, true) - if idx <= #str then - decode_error(str, idx, "trailing garbage") - end - return res -end - --[[ base64 -- v1.5.3 public domain Lua base64 encoder/decoder no warranty implied; use at your own risk @@ -967,11 +540,11 @@ local function handle_client_connection(client) local success, res = pcall(handle_request, res, env) if (not success) then __error("Failed to handle request due to \n" .. res) - response.body = fiddlejson.encode({error=tostring(res)}) + response.body = net.lua2json({error=tostring(res)}) response.status = INTERNAL_SERVER_ERROR else __info("Handled request") - response.body = fiddlejson.encode({result=res}) + response.body = net.lua2json({result=res}) response.status = OK end end @@ -1040,7 +613,6 @@ if (isMission) then __info("DCS Fiddle server running") env.info("DCS Fiddle successfully initialized.\n\nHappy Hacking!!", false) - -- trigger.action.outText("DCS Fiddle successfully initialized.", 5) elseif (not isMission) then __info("Starting fiddle server in the Hooks environment...")