diff options
Diffstat (limited to 'prosody-module/mod_http_upload_external/dkjson.lib.lua')
| -rw-r--r-- | prosody-module/mod_http_upload_external/dkjson.lib.lua | 714 |
1 files changed, 0 insertions, 714 deletions
diff --git a/prosody-module/mod_http_upload_external/dkjson.lib.lua b/prosody-module/mod_http_upload_external/dkjson.lib.lua deleted file mode 100644 index fa50b9f..0000000 --- a/prosody-module/mod_http_upload_external/dkjson.lib.lua +++ /dev/null @@ -1,714 +0,0 @@ --- Module options: -local always_try_using_lpeg = true -local register_global_module_table = false -local global_module_name = 'json' - ---[==[ - -David Kolf's JSON module for Lua 5.1/5.2 - -Version 2.5 - - -For the documentation see the corresponding readme.txt or visit -<http://dkolf.de/src/dkjson-lua.fsl/>. - -You can contact the author by sending an e-mail to 'david' at the -domain 'dkolf.de'. - - -Copyright (C) 2010-2013 David Heiko Kolf - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS -BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN -CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. - ---]==] - --- global dependencies: -local pairs, type, tostring, tonumber, getmetatable, setmetatable, rawset = - pairs, type, tostring, tonumber, getmetatable, setmetatable, rawset -local error, require, pcall, select = error, require, pcall, select -local floor, huge = math.floor, math.huge -local strrep, gsub, strsub, strbyte, strchar, strfind, strlen, strformat = - string.rep, string.gsub, string.sub, string.byte, string.char, - string.find, string.len, string.format -local strmatch = string.match -local concat = table.concat - -local json = { version = "dkjson 2.5" } - -if register_global_module_table then - _G[global_module_name] = json -end - -local _ENV = nil -- blocking globals in Lua 5.2 - -pcall (function() - -- Enable access to blocked metatables. - -- Don't worry, this module doesn't change anything in them. - local debmeta = require "debug".getmetatable - if debmeta then getmetatable = debmeta end -end) - -json.null = setmetatable ({}, { - __tojson = function () return "null" end -}) - -local function isarray (tbl) - local max, n, arraylen = 0, 0, 0 - for k,v in pairs (tbl) do - if k == 'n' and type(v) == 'number' then - arraylen = v - if v > max then - max = v - end - else - if type(k) ~= 'number' or k < 1 or floor(k) ~= k then - return false - end - if k > max then - max = k - end - n = n + 1 - end - end - if max > 10 and max > arraylen and max > n * 2 then - return false -- don't create an array with too many holes - end - return true, max -end - -local escapecodes = { - ["\""] = "\\\"", ["\\"] = "\\\\", ["\b"] = "\\b", ["\f"] = "\\f", - ["\n"] = "\\n", ["\r"] = "\\r", ["\t"] = "\\t" -} - -local function escapeutf8 (uchar) - local value = escapecodes[uchar] - if value then - return value - end - local a, b, c, d = strbyte (uchar, 1, 4) - a, b, c, d = a or 0, b or 0, c or 0, d or 0 - if a <= 0x7f then - value = a - elseif 0xc0 <= a and a <= 0xdf and b >= 0x80 then - value = (a - 0xc0) * 0x40 + b - 0x80 - elseif 0xe0 <= a and a <= 0xef and b >= 0x80 and c >= 0x80 then - value = ((a - 0xe0) * 0x40 + b - 0x80) * 0x40 + c - 0x80 - elseif 0xf0 <= a and a <= 0xf7 and b >= 0x80 and c >= 0x80 and d >= 0x80 then - value = (((a - 0xf0) * 0x40 + b - 0x80) * 0x40 + c - 0x80) * 0x40 + d - 0x80 - else - return "" - end - if value <= 0xffff then - return strformat ("\\u%.4x", value) - elseif value <= 0x10ffff then - -- encode as UTF-16 surrogate pair - value = value - 0x10000 - local highsur, lowsur = 0xD800 + floor (value/0x400), 0xDC00 + (value % 0x400) - return strformat ("\\u%.4x\\u%.4x", highsur, lowsur) - else - return "" - end -end - -local function fsub (str, pattern, repl) - -- gsub always builds a new string in a buffer, even when no match - -- exists. First using find should be more efficient when most strings - -- don't contain the pattern. - if strfind (str, pattern) then - return gsub (str, pattern, repl) - else - return str - end -end - -local function quotestring (value) - -- based on the regexp "escapable" in https://github.com/douglascrockford/JSON-js - value = fsub (value, "[%z\1-\31\"\\\127]", escapeutf8) - if strfind (value, "[\194\216\220\225\226\239]") then - value = fsub (value, "\194[\128-\159\173]", escapeutf8) - value = fsub (value, "\216[\128-\132]", escapeutf8) - value = fsub (value, "\220\143", escapeutf8) - value = fsub (value, "\225\158[\180\181]", escapeutf8) - value = fsub (value, "\226\128[\140-\143\168-\175]", escapeutf8) - value = fsub (value, "\226\129[\160-\175]", escapeutf8) - value = fsub (value, "\239\187\191", escapeutf8) - value = fsub (value, "\239\191[\176-\191]", escapeutf8) - end - return "\"" .. value .. "\"" -end -json.quotestring = quotestring - -local function replace(str, o, n) - local i, j = strfind (str, o, 1, true) - if i then - return strsub(str, 1, i-1) .. n .. strsub(str, j+1, -1) - else - return str - end -end - --- locale independent num2str and str2num functions -local decpoint, numfilter - -local function updatedecpoint () - decpoint = strmatch(tostring(0.5), "([^05+])") - -- build a filter that can be used to remove group separators - numfilter = "[^0-9%-%+eE" .. gsub(decpoint, "[%^%$%(%)%%%.%[%]%*%+%-%?]", "%%%0") .. "]+" -end - -updatedecpoint() - -local function num2str (num) - return replace(fsub(tostring(num), numfilter, ""), decpoint, ".") -end - -local function str2num (str) - local num = tonumber(replace(str, ".", decpoint)) - if not num then - updatedecpoint() - num = tonumber(replace(str, ".", decpoint)) - end - return num -end - -local function addnewline2 (level, buffer, buflen) - buffer[buflen+1] = "\n" - buffer[buflen+2] = strrep (" ", level) - buflen = buflen + 2 - return buflen -end - -function json.addnewline (state) - if state.indent then - state.bufferlen = addnewline2 (state.level or 0, - state.buffer, state.bufferlen or #(state.buffer)) - end -end - -local encode2 -- forward declaration - -local function addpair (key, value, prev, indent, level, buffer, buflen, tables, globalorder, state) - local kt = type (key) - if kt ~= 'string' and kt ~= 'number' then - return nil, "type '" .. kt .. "' is not supported as a key by JSON." - end - if prev then - buflen = buflen + 1 - buffer[buflen] = "," - end - if indent then - buflen = addnewline2 (level, buffer, buflen) - end - buffer[buflen+1] = quotestring (key) - buffer[buflen+2] = ":" - return encode2 (value, indent, level, buffer, buflen + 2, tables, globalorder, state) -end - -local function appendcustom(res, buffer, state) - local buflen = state.bufferlen - if type (res) == 'string' then - buflen = buflen + 1 - buffer[buflen] = res - end - return buflen -end - -local function exception(reason, value, state, buffer, buflen, defaultmessage) - defaultmessage = defaultmessage or reason - local handler = state.exception - if not handler then - return nil, defaultmessage - else - state.bufferlen = buflen - local ret, msg = handler (reason, value, state, defaultmessage) - if not ret then return nil, msg or defaultmessage end - return appendcustom(ret, buffer, state) - end -end - -function json.encodeexception(reason, value, state, defaultmessage) - return quotestring("<" .. defaultmessage .. ">") -end - -encode2 = function (value, indent, level, buffer, buflen, tables, globalorder, state) - local valtype = type (value) - local valmeta = getmetatable (value) - valmeta = type (valmeta) == 'table' and valmeta -- only tables - local valtojson = valmeta and valmeta.__tojson - if valtojson then - if tables[value] then - return exception('reference cycle', value, state, buffer, buflen) - end - tables[value] = true - state.bufferlen = buflen - local ret, msg = valtojson (value, state) - if not ret then return exception('custom encoder failed', value, state, buffer, buflen, msg) end - tables[value] = nil - buflen = appendcustom(ret, buffer, state) - elseif value == nil then - buflen = buflen + 1 - buffer[buflen] = "null" - elseif valtype == 'number' then - local s - if value ~= value or value >= huge or -value >= huge then - -- This is the behaviour of the original JSON implementation. - s = "null" - else - s = num2str (value) - end - buflen = buflen + 1 - buffer[buflen] = s - elseif valtype == 'boolean' then - buflen = buflen + 1 - buffer[buflen] = value and "true" or "false" - elseif valtype == 'string' then - buflen = buflen + 1 - buffer[buflen] = quotestring (value) - elseif valtype == 'table' then - if tables[value] then - return exception('reference cycle', value, state, buffer, buflen) - end - tables[value] = true - level = level + 1 - local isa, n = isarray (value) - if n == 0 and valmeta and valmeta.__jsontype == 'object' then - isa = false - end - local msg - if isa then -- JSON array - buflen = buflen + 1 - buffer[buflen] = "[" - for i = 1, n do - buflen, msg = encode2 (value[i], indent, level, buffer, buflen, tables, globalorder, state) - if not buflen then return nil, msg end - if i < n then - buflen = buflen + 1 - buffer[buflen] = "," - end - end - buflen = buflen + 1 - buffer[buflen] = "]" - else -- JSON object - local prev = false - buflen = buflen + 1 - buffer[buflen] = "{" - local order = valmeta and valmeta.__jsonorder or globalorder - if order then - local used = {} - n = #order - for i = 1, n do - local k = order[i] - local v = value[k] - if v then - used[k] = true - buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state) - prev = true -- add a seperator before the next element - end - end - for k,v in pairs (value) do - if not used[k] then - buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state) - if not buflen then return nil, msg end - prev = true -- add a seperator before the next element - end - end - else -- unordered - for k,v in pairs (value) do - buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state) - if not buflen then return nil, msg end - prev = true -- add a seperator before the next element - end - end - if indent then - buflen = addnewline2 (level - 1, buffer, buflen) - end - buflen = buflen + 1 - buffer[buflen] = "}" - end - tables[value] = nil - else - return exception ('unsupported type', value, state, buffer, buflen, - "type '" .. valtype .. "' is not supported by JSON.") - end - return buflen -end - -function json.encode (value, state) - state = state or {} - local oldbuffer = state.buffer - local buffer = oldbuffer or {} - state.buffer = buffer - updatedecpoint() - local ret, msg = encode2 (value, state.indent, state.level or 0, - buffer, state.bufferlen or 0, state.tables or {}, state.keyorder, state) - if not ret then - error (msg, 2) - elseif oldbuffer == buffer then - state.bufferlen = ret - return true - else - state.bufferlen = nil - state.buffer = nil - return concat (buffer) - end -end - -local function loc (str, where) - local line, pos, linepos = 1, 1, 0 - while true do - pos = strfind (str, "\n", pos, true) - if pos and pos < where then - line = line + 1 - linepos = pos - pos = pos + 1 - else - break - end - end - return "line " .. line .. ", column " .. (where - linepos) -end - -local function unterminated (str, what, where) - return nil, strlen (str) + 1, "unterminated " .. what .. " at " .. loc (str, where) -end - -local function scanwhite (str, pos) - while true do - pos = strfind (str, "%S", pos) - if not pos then return nil end - local sub2 = strsub (str, pos, pos + 1) - if sub2 == "\239\187" and strsub (str, pos + 2, pos + 2) == "\191" then - -- UTF-8 Byte Order Mark - pos = pos + 3 - elseif sub2 == "//" then - pos = strfind (str, "[\n\r]", pos + 2) - if not pos then return nil end - elseif sub2 == "/*" then - pos = strfind (str, "*/", pos + 2) - if not pos then return nil end - pos = pos + 2 - else - return pos - end - end -end - -local escapechars = { - ["\""] = "\"", ["\\"] = "\\", ["/"] = "/", ["b"] = "\b", ["f"] = "\f", - ["n"] = "\n", ["r"] = "\r", ["t"] = "\t" -} - -local function unichar (value) - if value < 0 then - return nil - elseif value <= 0x007f then - return strchar (value) - elseif value <= 0x07ff then - return strchar (0xc0 + floor(value/0x40), - 0x80 + (floor(value) % 0x40)) - elseif value <= 0xffff then - return strchar (0xe0 + floor(value/0x1000), - 0x80 + (floor(value/0x40) % 0x40), - 0x80 + (floor(value) % 0x40)) - elseif value <= 0x10ffff then - return strchar (0xf0 + floor(value/0x40000), - 0x80 + (floor(value/0x1000) % 0x40), - 0x80 + (floor(value/0x40) % 0x40), - 0x80 + (floor(value) % 0x40)) - else - return nil - end -end - -local function scanstring (str, pos) - local lastpos = pos + 1 - local buffer, n = {}, 0 - while true do - local nextpos = strfind (str, "[\"\\]", lastpos) - if not nextpos then - return unterminated (str, "string", pos) - end - if nextpos > lastpos then - n = n + 1 - buffer[n] = strsub (str, lastpos, nextpos - 1) - end - if strsub (str, nextpos, nextpos) == "\"" then - lastpos = nextpos + 1 - break - else - local escchar = strsub (str, nextpos + 1, nextpos + 1) - local value - if escchar == "u" then - value = tonumber (strsub (str, nextpos + 2, nextpos + 5), 16) - if value then - local value2 - if 0xD800 <= value and value <= 0xDBff then - -- we have the high surrogate of UTF-16. Check if there is a - -- low surrogate escaped nearby to combine them. - if strsub (str, nextpos + 6, nextpos + 7) == "\\u" then - value2 = tonumber (strsub (str, nextpos + 8, nextpos + 11), 16) - if value2 and 0xDC00 <= value2 and value2 <= 0xDFFF then - value = (value - 0xD800) * 0x400 + (value2 - 0xDC00) + 0x10000 - else - value2 = nil -- in case it was out of range for a low surrogate - end - end - end - value = value and unichar (value) - if value then - if value2 then - lastpos = nextpos + 12 - else - lastpos = nextpos + 6 - end - end - end - end - if not value then - value = escapechars[escchar] or escchar - lastpos = nextpos + 2 - end - n = n + 1 - buffer[n] = value - end - end - if n == 1 then - return buffer[1], lastpos - elseif n > 1 then - return concat (buffer), lastpos - else - return "", lastpos - end -end - -local scanvalue -- forward declaration - -local function scantable (what, closechar, str, startpos, nullval, objectmeta, arraymeta) - local len = strlen (str) - local tbl, n = {}, 0 - local pos = startpos + 1 - if what == 'object' then - setmetatable (tbl, objectmeta) - else - setmetatable (tbl, arraymeta) - end - while true do - pos = scanwhite (str, pos) - if not pos then return unterminated (str, what, startpos) end - local char = strsub (str, pos, pos) - if char == closechar then - return tbl, pos + 1 - end - local val1, err - val1, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta) - if err then return nil, pos, err end - pos = scanwhite (str, pos) - if not pos then return unterminated (str, what, startpos) end - char = strsub (str, pos, pos) - if char == ":" then - if val1 == nil then - return nil, pos, "cannot use nil as table index (at " .. loc (str, pos) .. ")" - end - pos = scanwhite (str, pos + 1) - if not pos then return unterminated (str, what, startpos) end - local val2 - val2, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta) - if err then return nil, pos, err end - tbl[val1] = val2 - pos = scanwhite (str, pos) - if not pos then return unterminated (str, what, startpos) end - char = strsub (str, pos, pos) - else - n = n + 1 - tbl[n] = val1 - end - if char == "," then - pos = pos + 1 - end - end -end - -scanvalue = function (str, pos, nullval, objectmeta, arraymeta) - pos = pos or 1 - pos = scanwhite (str, pos) - if not pos then - return nil, strlen (str) + 1, "no valid JSON value (reached the end)" - end - local char = strsub (str, pos, pos) - if char == "{" then - return scantable ('object', "}", str, pos, nullval, objectmeta, arraymeta) - elseif char == "[" then - return scantable ('array', "]", str, pos, nullval, objectmeta, arraymeta) - elseif char == "\"" then - return scanstring (str, pos) - else - local pstart, pend = strfind (str, "^%-?[%d%.]+[eE]?[%+%-]?%d*", pos) - if pstart then - local number = str2num (strsub (str, pstart, pend)) - if number then - return number, pend + 1 - end - end - pstart, pend = strfind (str, "^%a%w*", pos) - if pstart then - local name = strsub (str, pstart, pend) - if name == "true" then - return true, pend + 1 - elseif name == "false" then - return false, pend + 1 - elseif name == "null" then - return nullval, pend + 1 - end - end - return nil, pos, "no valid JSON value at " .. loc (str, pos) - end -end - -local function optionalmetatables(...) - if select("#", ...) > 0 then - return ... - else - return {__jsontype = 'object'}, {__jsontype = 'array'} - end -end - -function json.decode (str, pos, nullval, ...) - local objectmeta, arraymeta = optionalmetatables(...) - return scanvalue (str, pos, nullval, objectmeta, arraymeta) -end - -function json.use_lpeg () - local g = require ("lpeg") - - if g.version() == "0.11" then - error "due to a bug in LPeg 0.11, it cannot be used for JSON matching" - end - - local pegmatch = g.match - local P, S, R = g.P, g.S, g.R - - local function ErrorCall (str, pos, msg, state) - if not state.msg then - state.msg = msg .. " at " .. loc (str, pos) - state.pos = pos - end - return false - end - - local function Err (msg) - return g.Cmt (g.Cc (msg) * g.Carg (2), ErrorCall) - end - - local SingleLineComment = P"//" * (1 - S"\n\r")^0 - local MultiLineComment = P"/*" * (1 - P"*/")^0 * P"*/" - local Space = (S" \n\r\t" + P"\239\187\191" + SingleLineComment + MultiLineComment)^0 - - local PlainChar = 1 - S"\"\\\n\r" - local EscapeSequence = (P"\\" * g.C (S"\"\\/bfnrt" + Err "unsupported escape sequence")) / escapechars - local HexDigit = R("09", "af", "AF") - local function UTF16Surrogate (match, pos, high, low) - high, low = tonumber (high, 16), tonumber (low, 16) - if 0xD800 <= high and high <= 0xDBff and 0xDC00 <= low and low <= 0xDFFF then - return true, unichar ((high - 0xD800) * 0x400 + (low - 0xDC00) + 0x10000) - else - return false - end - end - local function UTF16BMP (hex) - return unichar (tonumber (hex, 16)) - end - local U16Sequence = (P"\\u" * g.C (HexDigit * HexDigit * HexDigit * HexDigit)) - local UnicodeEscape = g.Cmt (U16Sequence * U16Sequence, UTF16Surrogate) + U16Sequence/UTF16BMP - local Char = UnicodeEscape + EscapeSequence + PlainChar - local String = P"\"" * g.Cs (Char ^ 0) * (P"\"" + Err "unterminated string") - local Integer = P"-"^(-1) * (P"0" + (R"19" * R"09"^0)) - local Fractal = P"." * R"09"^0 - local Exponent = (S"eE") * (S"+-")^(-1) * R"09"^1 - local Number = (Integer * Fractal^(-1) * Exponent^(-1))/str2num - local Constant = P"true" * g.Cc (true) + P"false" * g.Cc (false) + P"null" * g.Carg (1) - local SimpleValue = Number + String + Constant - local ArrayContent, ObjectContent - - -- The functions parsearray and parseobject parse only a single value/pair - -- at a time and store them directly to avoid hitting the LPeg limits. - local function parsearray (str, pos, nullval, state) - local obj, cont - local npos - local t, nt = {}, 0 - repeat - obj, cont, npos = pegmatch (ArrayContent, str, pos, nullval, state) - if not npos then break end - pos = npos - nt = nt + 1 - t[nt] = obj - until cont == 'last' - return pos, setmetatable (t, state.arraymeta) - end - - local function parseobject (str, pos, nullval, state) - local obj, key, cont - local npos - local t = {} - repeat - key, obj, cont, npos = pegmatch (ObjectContent, str, pos, nullval, state) - if not npos then break end - pos = npos - t[key] = obj - until cont == 'last' - return pos, setmetatable (t, state.objectmeta) - end - - local Array = P"[" * g.Cmt (g.Carg(1) * g.Carg(2), parsearray) * Space * (P"]" + Err "']' expected") - local Object = P"{" * g.Cmt (g.Carg(1) * g.Carg(2), parseobject) * Space * (P"}" + Err "'}' expected") - local Value = Space * (Array + Object + SimpleValue) - local ExpectedValue = Value + Space * Err "value expected" - ArrayContent = Value * Space * (P"," * g.Cc'cont' + g.Cc'last') * g.Cp() - local Pair = g.Cg (Space * String * Space * (P":" + Err "colon expected") * ExpectedValue) - ObjectContent = Pair * Space * (P"," * g.Cc'cont' + g.Cc'last') * g.Cp() - local DecodeValue = ExpectedValue * g.Cp () - - function json.decode (str, pos, nullval, ...) - local state = {} - state.objectmeta, state.arraymeta = optionalmetatables(...) - local obj, retpos = pegmatch (DecodeValue, str, pos, nullval, state) - if state.msg then - return nil, state.pos, state.msg - else - return obj, retpos - end - end - - -- use this function only once: - json.use_lpeg = function () return json end - - json.using_lpeg = true - - return json -- so you can get the module using json = require "dkjson".use_lpeg() -end - -if always_try_using_lpeg then - pcall (json.use_lpeg) -end - -return json - |