Luaにおけるphpシーケンス化および逆シーケンス化関数の実現
9310 ワード
嬉しいですね.昨日luaが持っているライブラリをめくって、ネット上で一日luaでどのようにシーケンス化するか、逆シーケンス化するかを探しましたが、結果は私が望んでいるものではありません.phpシーケンス化関数によってシーケンス化された文字列をluaで逆シーケンス化するからです.例えば、
a:9:{s:10:"comment_id";s:1:"1";s:7:"user_id";s:7:"7082457";s:9:"user_name";s:9:"putulbaby";s:11:"user_avatar";s:68:"http://avatar.bbs.miui.com/data/avatar/001/05/37/38_avatar_small.jpg";s:15:"comment_content";s:63:"青が好きで、そう決めました～～～～～～～～～～～～～～～";s:13:"comment_grade";s:1:"1";s:13:"average_grade";s:3:"5.0";s:6:"up_num";s:1:"0";s:13:"reply_content";s:0:""""";しかし、ネット上のいくつかの関数はluaのtableタイプのデータを文字列に変換するだけで、変換された文字列のスタイルが異なり、上記の文字列を配列に解析することはできません.の
今日1つ書こうと思っていたのですが、何気なく昨日の帰りに開いたページにこんな関数があることに気づき、よく見てみると、私のニーズに満足しているようで、一度実行した後、やはり上の文字列を解析してしまいました!!しかし、送信された配列に値が数字の文字列が含まれている場合、シーケンス化された後、文字列ではなく数字として認識されるという問題があるようです.のコードは次のとおりです.
--[[ @file Lua port of PHP serialization functions. Port based on PHPSerialize and PHPUnserialize by Scott Hurring http://hurring.com/scott/code/python/serialize/v0.4 @version v0.1 BETA @author Fernando P. García; fernando at develcuy dot com @copyright Copyright (c) 2009 Fernando P. García @license http://opensource.org/licenses/gpl-license.php GNU Public License $Id$ ]] local _serialize_key, _read_chars, _read_until, _unknown_type function _serialize_key(data) --[[ Serialize a key, which follows different rules than when serializing values. Many thanks to Todd DeLuca for pointing out that keys are serialized differently than values! From http://us2.php.net/manual/en/language.types.array.php A key may be either an integer or a string. If a key is the standard representation of an integer, it will be interpreted as such (i.e. "8"will be interpreted as int 8, while "08"will be interpreted as "08"). Floats in key are truncated to integer. ]] -- Integer, Long, Float if type(data) == 'number' then return 'i:' .. tonumber(data) .. ';' -- Boolean => integer elseif type(data) == 'boolean' then if data then return 'i:1;' else return 'i:0;' end -- String => string or String => int (if string looks like int) elseif type(data) == 'string' then if tonumber(data) == nil then return 's:' .. string.len(data) .. ':"' .. data .. '";' else return 'i:' .. tonumber(data) .. ';' end -- None/NULL => empty string elseif type(data) == 'nil' then return 's:0:"";' -- I dont know how to serialize this else error('Unknown/Unhandled key type (' .. type(data) .. ')!') end end function serialize(data) --[[ Serialize a value. ]] local i, out, key, value -- Numbers if type(data) == 'number' then -- Integer => integer if math.floor(data) == data then return 'i:' .. data .. ';' -- Float, Long => double else return 'd:' .. data .. ';' end -- String => string or String => int (if string looks like int) -- Thanks to Todd DeLuca for noticing that PHP strings that -- look like integers are serialized as ints by PHP elseif type(data) == 'string' then if tonumber(data) == nil then return 's:' .. string.len(data) .. ':"' .. data .. '";' else return 'i:' .. tonumber(data) .. ';' end -- Nil/NULL elseif type(data) == 'nil' then return 'N;' -- Tuple and List => array -- The 'a' array type is the only kind of list supported by PHP. -- array keys are automagically numbered up from 0 elseif type(data) == 'table' then i = 0 out = {} -- All arrays must have keys for key, value in pairs(data) do table.insert(out, _serialize_key(key)) table.insert(out, serialize(value)) i = i + 1 end return 'a:' .. i .. ':{' .. table.concat(out) .. '}' -- Boolean => bool elseif type(data) == 'boolean' then if data then return 'b:1;' else return 'b:0;' end --~ TODO: --~ -- Table + Functions => stdClass --~ elseif type(data) == 'function' then --~ # I dont know how to serialize this else error('Unknown/Unhandled data type (' .. type(data) .. ')!') end end function _read_until(data, offset, stopchar) --[[ Read from data[offset] until you encounter some char 'stopchar'. ]] local buf = {} local char = string.sub(data, offset + 1, offset + 1) local i = 2 while not (char == stopchar) do -- Consumed all the characters and havent found ';' if i + offset > string.len(data) then error('Invalid') end table.insert(buf, char) char = string.sub(data, offset + i, offset + i) i = i + 1 end -- (chars_read, data) return i - 2, table.concat(buf) end function _read_chars(data, offset, length) --[[ Read 'length' number of chars from data[offset]. ]] local buf = {}, char -- Account for the starting quote char -- offset += 1 for i = 0, length -1 do char = string.sub(data, offset + i, offset + i) table.insert(buf, char) end -- (chars_read, data) return length, table.concat(buf) end function unserialize(data, offset) offset = offset or 0 --[[ Find the next token and unserialize it. Recurse on array. offset = raw offset from start of data --]] local buf, dtype, dataoffset, typeconvert, datalength, chars, readdata, i, key, value, keys, properties, otchars, otype, property buf = {} dtype = string.lower(string.sub(data, offset + 1, offset + 1)) -- 't:' = 2 chars dataoffset = offset + 2 typeconvert = function(x) return x end datalength = 0 chars = datalength -- int or double => Number if dtype == 'i' or dtype == 'd' then typeconvert = function(x) return tonumber(x) end chars, readdata = _read_until(data, dataoffset, ';') -- +1 for end semicolon dataoffset = dataoffset + chars + 1 -- bool => Boolean elseif dtype == 'b' then typeconvert = function(x) return tonumber(x) == 1 end chars, readdata = _read_until(data, dataoffset, ';') -- +1 for end semicolon dataoffset = dataoffset + chars + 1 -- n => None elseif dtype == 'n' then readdata = nil -- s => String elseif dtype == 's' then chars, stringlength = _read_until(data, dataoffset, ':') -- +2 for colons around length field dataoffset = dataoffset + chars + 2 -- +1 for start quote chars, readdata = _read_chars(data, dataoffset + 1, tonumber(stringlength)) -- +2 for endquote semicolon dataoffset = dataoffset + chars + 2 --[[ TODO review original: if chars != int(stringlength) != int(readdata): ]] if not (chars == tonumber(stringlength)) then error('String length mismatch') end -- array => Table -- If you originally serialized a Tuple or List, it will -- be unserialized as a Dict. PHP doesn't have tuples or lists, -- only arrays - so everything has to get converted into an array -- when serializing and the original type of the array is lost elseif dtype == 'a' then readdata = {} -- How many keys does this list have? chars, keys = _read_until(data, dataoffset, ':') -- +2 for colons around length field dataoffset = dataoffset + chars + 2 -- Loop through and fetch this number of key/value pairs for i = 0, tonumber(keys) - 1 do -- Read the key key, ktype, kchars = unserialize(data, dataoffset) dataoffset = dataoffset + kchars -- Read value of the key value, vtype, vchars = unserialize(data, dataoffset) -- Cound ending bracket of nested array if vtype == 'a' then vchars = vchars + 1 end dataoffset = dataoffset + vchars -- Set the list element readdata[key] = value end -- object => Table elseif dtype == 'o' then readdata = {} -- How log is the type of this object? chars, otchars = _read_until(data, dataoffset, ':') dataoffset = dataoffset + chars + 2 -- Which type is this object? otype = string.sub(data, dataoffset + 1, dataoffset + otchars) dataoffset = dataoffset + otchars + 2 if otype == 'stdClass' then -- How many properties does this list have? chars, properties = _read_until(data, dataoffset, ':') -- +2 for colons around length field dataoffset = dataoffset + chars + 2 -- Loop through and fetch this number of key/value pairs for i = 0, tonumber(properties) - 1 do -- Read the key property, ktype, kchars = unserialize(data, dataoffset) dataoffset = dataoffset + kchars -- Read value of the key value, vtype, vchars = unserialize(data, dataoffset) -- Cound ending bracket of nested array if vtype == 'a' then vchars = vchars + 1 end dataoffset = dataoffset + vchars -- Set the list element readdata[property] = value end else _unknown_type(dtype) end else _unknown_type(dtype) end --~ return (dtype, dataoffset-offset, typeconvert(readdata)) return typeconvert(readdata), dtype, dataoffset - offset end -- I don't know how to unserialize this function _unknown_type(type_) error('Unknown/Unhandled data type (' .. type_ .. ')!', 2) end
その後も質問がありましたが、私のシーケンス化されたデータはredisからlrange法で読み込まれたもので、ボスに聞いてみましたが、読み込んだときはphpでシーケンス化されていましたが、読み込まれたものはシーケンス化されたデータだと思いますluaのtype関数で検出したところtableタイプでした..これによりunserialize法を直接逆シーケンス化することはできない.その後luaで配列を便利にする方法for key,value in pairs(lists)do print(key.value)endを用いて,シーケンス化された値がvalueの中にあることを発見し,これでやりやすくなり,valueを直接逆シーケンス化すればよい.お疲れ様でした...
a:9:{s:10:"comment_id";s:1:"1";s:7:"user_id";s:7:"7082457";s:9:"user_name";s:9:"putulbaby";s:11:"user_avatar";s:68:"http://avatar.bbs.miui.com/data/avatar/001/05/37/38_avatar_small.jpg";s:15:"comment_content";s:63:"青が好きで、そう決めました～～～～～～～～～～～～～～～";s:13:"comment_grade";s:1:"1";s:13:"average_grade";s:3:"5.0";s:6:"up_num";s:1:"0";s:13:"reply_content";s:0:""""";しかし、ネット上のいくつかの関数はluaのtableタイプのデータを文字列に変換するだけで、変換された文字列のスタイルが異なり、上記の文字列を配列に解析することはできません.の
今日1つ書こうと思っていたのですが、何気なく昨日の帰りに開いたページにこんな関数があることに気づき、よく見てみると、私のニーズに満足しているようで、一度実行した後、やはり上の文字列を解析してしまいました!!しかし、送信された配列に値が数字の文字列が含まれている場合、シーケンス化された後、文字列ではなく数字として認識されるという問題があるようです.のコードは次のとおりです.
--[[ @file Lua port of PHP serialization functions. Port based on PHPSerialize and PHPUnserialize by Scott Hurring http://hurring.com/scott/code/python/serialize/v0.4 @version v0.1 BETA @author Fernando P. García; fernando at develcuy dot com @copyright Copyright (c) 2009 Fernando P. García @license http://opensource.org/licenses/gpl-license.php GNU Public License $Id$ ]] local _serialize_key, _read_chars, _read_until, _unknown_type function _serialize_key(data) --[[ Serialize a key, which follows different rules than when serializing values. Many thanks to Todd DeLuca for pointing out that keys are serialized differently than values! From http://us2.php.net/manual/en/language.types.array.php A key may be either an integer or a string. If a key is the standard representation of an integer, it will be interpreted as such (i.e. "8"will be interpreted as int 8, while "08"will be interpreted as "08"). Floats in key are truncated to integer. ]] -- Integer, Long, Float if type(data) == 'number' then return 'i:' .. tonumber(data) .. ';' -- Boolean => integer elseif type(data) == 'boolean' then if data then return 'i:1;' else return 'i:0;' end -- String => string or String => int (if string looks like int) elseif type(data) == 'string' then if tonumber(data) == nil then return 's:' .. string.len(data) .. ':"' .. data .. '";' else return 'i:' .. tonumber(data) .. ';' end -- None/NULL => empty string elseif type(data) == 'nil' then return 's:0:"";' -- I dont know how to serialize this else error('Unknown/Unhandled key type (' .. type(data) .. ')!') end end function serialize(data) --[[ Serialize a value. ]] local i, out, key, value -- Numbers if type(data) == 'number' then -- Integer => integer if math.floor(data) == data then return 'i:' .. data .. ';' -- Float, Long => double else return 'd:' .. data .. ';' end -- String => string or String => int (if string looks like int) -- Thanks to Todd DeLuca for noticing that PHP strings that -- look like integers are serialized as ints by PHP elseif type(data) == 'string' then if tonumber(data) == nil then return 's:' .. string.len(data) .. ':"' .. data .. '";' else return 'i:' .. tonumber(data) .. ';' end -- Nil/NULL elseif type(data) == 'nil' then return 'N;' -- Tuple and List => array -- The 'a' array type is the only kind of list supported by PHP. -- array keys are automagically numbered up from 0 elseif type(data) == 'table' then i = 0 out = {} -- All arrays must have keys for key, value in pairs(data) do table.insert(out, _serialize_key(key)) table.insert(out, serialize(value)) i = i + 1 end return 'a:' .. i .. ':{' .. table.concat(out) .. '}' -- Boolean => bool elseif type(data) == 'boolean' then if data then return 'b:1;' else return 'b:0;' end --~ TODO: --~ -- Table + Functions => stdClass --~ elseif type(data) == 'function' then --~ # I dont know how to serialize this else error('Unknown/Unhandled data type (' .. type(data) .. ')!') end end function _read_until(data, offset, stopchar) --[[ Read from data[offset] until you encounter some char 'stopchar'. ]] local buf = {} local char = string.sub(data, offset + 1, offset + 1) local i = 2 while not (char == stopchar) do -- Consumed all the characters and havent found ';' if i + offset > string.len(data) then error('Invalid') end table.insert(buf, char) char = string.sub(data, offset + i, offset + i) i = i + 1 end -- (chars_read, data) return i - 2, table.concat(buf) end function _read_chars(data, offset, length) --[[ Read 'length' number of chars from data[offset]. ]] local buf = {}, char -- Account for the starting quote char -- offset += 1 for i = 0, length -1 do char = string.sub(data, offset + i, offset + i) table.insert(buf, char) end -- (chars_read, data) return length, table.concat(buf) end function unserialize(data, offset) offset = offset or 0 --[[ Find the next token and unserialize it. Recurse on array. offset = raw offset from start of data --]] local buf, dtype, dataoffset, typeconvert, datalength, chars, readdata, i, key, value, keys, properties, otchars, otype, property buf = {} dtype = string.lower(string.sub(data, offset + 1, offset + 1)) -- 't:' = 2 chars dataoffset = offset + 2 typeconvert = function(x) return x end datalength = 0 chars = datalength -- int or double => Number if dtype == 'i' or dtype == 'd' then typeconvert = function(x) return tonumber(x) end chars, readdata = _read_until(data, dataoffset, ';') -- +1 for end semicolon dataoffset = dataoffset + chars + 1 -- bool => Boolean elseif dtype == 'b' then typeconvert = function(x) return tonumber(x) == 1 end chars, readdata = _read_until(data, dataoffset, ';') -- +1 for end semicolon dataoffset = dataoffset + chars + 1 -- n => None elseif dtype == 'n' then readdata = nil -- s => String elseif dtype == 's' then chars, stringlength = _read_until(data, dataoffset, ':') -- +2 for colons around length field dataoffset = dataoffset + chars + 2 -- +1 for start quote chars, readdata = _read_chars(data, dataoffset + 1, tonumber(stringlength)) -- +2 for endquote semicolon dataoffset = dataoffset + chars + 2 --[[ TODO review original: if chars != int(stringlength) != int(readdata): ]] if not (chars == tonumber(stringlength)) then error('String length mismatch') end -- array => Table -- If you originally serialized a Tuple or List, it will -- be unserialized as a Dict. PHP doesn't have tuples or lists, -- only arrays - so everything has to get converted into an array -- when serializing and the original type of the array is lost elseif dtype == 'a' then readdata = {} -- How many keys does this list have? chars, keys = _read_until(data, dataoffset, ':') -- +2 for colons around length field dataoffset = dataoffset + chars + 2 -- Loop through and fetch this number of key/value pairs for i = 0, tonumber(keys) - 1 do -- Read the key key, ktype, kchars = unserialize(data, dataoffset) dataoffset = dataoffset + kchars -- Read value of the key value, vtype, vchars = unserialize(data, dataoffset) -- Cound ending bracket of nested array if vtype == 'a' then vchars = vchars + 1 end dataoffset = dataoffset + vchars -- Set the list element readdata[key] = value end -- object => Table elseif dtype == 'o' then readdata = {} -- How log is the type of this object? chars, otchars = _read_until(data, dataoffset, ':') dataoffset = dataoffset + chars + 2 -- Which type is this object? otype = string.sub(data, dataoffset + 1, dataoffset + otchars) dataoffset = dataoffset + otchars + 2 if otype == 'stdClass' then -- How many properties does this list have? chars, properties = _read_until(data, dataoffset, ':') -- +2 for colons around length field dataoffset = dataoffset + chars + 2 -- Loop through and fetch this number of key/value pairs for i = 0, tonumber(properties) - 1 do -- Read the key property, ktype, kchars = unserialize(data, dataoffset) dataoffset = dataoffset + kchars -- Read value of the key value, vtype, vchars = unserialize(data, dataoffset) -- Cound ending bracket of nested array if vtype == 'a' then vchars = vchars + 1 end dataoffset = dataoffset + vchars -- Set the list element readdata[property] = value end else _unknown_type(dtype) end else _unknown_type(dtype) end --~ return (dtype, dataoffset-offset, typeconvert(readdata)) return typeconvert(readdata), dtype, dataoffset - offset end -- I don't know how to unserialize this function _unknown_type(type_) error('Unknown/Unhandled data type (' .. type_ .. ')!', 2) end
その後も質問がありましたが、私のシーケンス化されたデータはredisからlrange法で読み込まれたもので、ボスに聞いてみましたが、読み込んだときはphpでシーケンス化されていましたが、読み込まれたものはシーケンス化されたデータだと思いますluaのtype関数で検出したところtableタイプでした..これによりunserialize法を直接逆シーケンス化することはできない.その後luaで配列を便利にする方法for key,value in pairs(lists)do print(key.value)endを用いて,シーケンス化された値がvalueの中にあることを発見し,これでやりやすくなり,valueを直接逆シーケンス化すればよい.お疲れ様でした...