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https://github.com/luapower/mysql.git
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unimportant
This commit is contained in:
Cosmin Apreutesei
parent
cb7ae6e888
commit
7e7d7501eb
272
mysql_client.lua
272
mysql_client.lua
@ -3,7 +3,7 @@
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-- Written by Yichun Zhang (agentzh). BSD license.
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local tcp = require'sock'.tcp
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local sha1 = require'sha1'
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local sha1 = require'sha1'.sha1
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local bit = require'bit'
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local sub = string.sub
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@ -165,7 +165,7 @@ end
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local function _from_cstring(data, i)
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local last = strfind(data, "\0", i, true)
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local last = strfind(data, '\0', i, true)
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if not last then
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return nil, nil
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end
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@ -175,7 +175,7 @@ end
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local function _to_cstring(data)
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return data .. "\0"
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return data .. '\0'
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end
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@ -188,9 +188,9 @@ local function _dump(data)
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local len = #data
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local bytes = new_tab(len, 0)
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for i = 1, len do
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bytes[i] = format("%x", strbyte(data, i))
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bytes[i] = format('%x', strbyte(data, i))
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end
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return concat(bytes, " ")
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return concat(bytes, ' ')
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end
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@ -200,13 +200,13 @@ local function _dumphex(data)
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for i = 1, len do
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bytes[i] = tohex(strbyte(data, i), 2)
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end
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return concat(bytes, " ")
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return concat(bytes, ' ')
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end
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local function _compute_token(password, scramble)
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if password == "" then
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return ""
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if password == '' then
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return ''
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end
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local stage1 = sha1(password)
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@ -227,68 +227,101 @@ local function _send_packet(self, req, size)
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self.packet_no = self.packet_no + 1
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-- print("packet no: ", self.packet_no)
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-- print('packet no: ', self.packet_no)
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local packet = _set_byte3(size) .. strchar(band(self.packet_no, 255)) .. req
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-- print("sending packet: ", _dump(packet))
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-- print('sending packet: ', _dump(packet))
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-- print("sending packet... of size " .. #packet)
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-- print('sending packet... of size ' .. #packet)
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return sock:send(packet)
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end
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--static, auto-growing buffer allocation pattern (ctype must be vla).
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local function grow_buffer(ctype)
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local vla = ffi.typeof(ctype)
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local buf, len = nil, -1
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return function(minlen)
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if minlen == false then
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buf, len = nil, -1
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elseif minlen > len then
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len = glue.nextpow2(minlen)
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buf = vla(len)
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end
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return buf, len
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end
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end
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local function _recv(self, sz)
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local buf = self.buf
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if not buf then
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buf = grow_buffer'char[?]'
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self.buf = buf
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end
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local buf = buf(sz)
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local sock = self.sock
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local offset = 0
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while sz > 0 do
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local n, err = sock:recv(buf + offset, sz)
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if not n then return nil, err end
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sz = sz - n
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offset = offset + n
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end
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return ffi.string(buf, offset)
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end
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local function _recv_packet(self)
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local sock = self.sock
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local data, err = sock:receive(4) -- packet header
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local data, err = _recv(self, 4) -- packet header
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if not data then
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return nil, nil, "failed to receive packet header: " .. err
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return nil, nil, 'failed to receive packet header: ' .. err
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end
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--print("packet header: ", _dump(data))
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--print('packet header: ', _dump(data))
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local len, pos = _get_byte3(data, 1)
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--print("packet length: ", len)
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--print('packet length: ', len)
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if len == 0 then
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return nil, nil, "empty packet"
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return nil, nil, 'empty packet'
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end
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if len > self._max_packet_size then
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return nil, nil, "packet size too big: " .. len
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return nil, nil, 'packet size too big: ' .. len
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end
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local num = strbyte(data, pos)
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--print("recv packet: packet no: ", num)
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--print('recv packet: packet no: ', num)
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self.packet_no = num
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data, err = sock:receive(len)
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data, err = _recv(self, len)
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--print("receive returned")
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--print('receive returned')
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if not data then
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return nil, nil, "failed to read packet content: " .. err
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return nil, nil, 'failed to read packet content: ' .. err
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end
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--print("packet content: ", _dump(data))
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--print("packet content (ascii): ", data)
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--print('packet content: ', _dump(data))
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--print('packet content (ascii): ', data)
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local field_count = strbyte(data, 1)
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local typ
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if field_count == 0x00 then
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typ = "OK"
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typ = 'OK'
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elseif field_count == 0xff then
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typ = "ERR"
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typ = 'ERR'
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elseif field_count == 0xfe then
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typ = "EOF"
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typ = 'EOF'
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else
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typ = "DATA"
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typ = 'DATA'
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end
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return data, typ
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@ -298,7 +331,7 @@ end
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local function _from_length_coded_bin(data, pos)
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local first = strbyte(data, pos)
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--print("LCB: first: ", first)
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--print('LCB: first: ', first)
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if not first then
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return nil, pos
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@ -348,26 +381,26 @@ local function _parse_ok_packet(packet)
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res.affected_rows, pos = _from_length_coded_bin(packet, 2)
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--print("affected rows: ", res.affected_rows, ", pos:", pos)
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--print('affected rows: ', res.affected_rows, ', pos:', pos)
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res.insert_id, pos = _from_length_coded_bin(packet, pos)
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--print("insert id: ", res.insert_id, ", pos:", pos)
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--print('insert id: ', res.insert_id, ', pos:', pos)
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res.server_status, pos = _get_byte2(packet, pos)
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--print("server status: ", res.server_status, ", pos:", pos)
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--print('server status: ', res.server_status, ', pos:', pos)
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res.warning_count, pos = _get_byte2(packet, pos)
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--print("warning count: ", res.warning_count, ", pos: ", pos)
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--print('warning count: ', res.warning_count, ', pos: ', pos)
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local message = _from_length_coded_str(packet, pos)
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if message and message ~= null then
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res.message = message
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end
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--print("message: ", res.message, ", pos:", pos)
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--print('message: ', res.message, ', pos:', pos)
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return res
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end
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@ -437,7 +470,7 @@ local function _parse_field_packet(data)
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col.decimals = strbyte(data, pos)
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pos = pos + 1
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local default = sub(data, pos + 2)
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if default and default ~= "" then
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if default and default ~= '' then
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col.default = default
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end
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return col
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@ -460,7 +493,7 @@ local function _parse_row_data_packet(data, cols, compact)
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local typ = col.type
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local name = col.name
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--print("row field value: ", value, ", type: ", typ)
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--print('row field value: ', value, ', type: ', typ)
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if value ~= null then
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local conv = converters[typ]
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@ -486,13 +519,13 @@ local function _recv_field_packet(self)
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return nil, err
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end
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if typ == "ERR" then
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if typ == 'ERR' then
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local errno, msg, sqlstate = _parse_err_packet(packet)
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return nil, msg, errno, sqlstate
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end
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if typ ~= 'DATA' then
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return nil, "bad field packet type: " .. typ
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return nil, 'bad field packet type: ' .. typ
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end
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-- typ == 'DATA'
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@ -513,7 +546,7 @@ end
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function _M.connect(self, opts)
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local sock = self.sock
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if not sock then
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return nil, "not initialized"
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return nil, 'not initialized'
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end
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local max_packet_size = opts.max_packet_size
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@ -526,79 +559,52 @@ function _M.connect(self, opts)
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self.compact = opts.compact_arrays
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local database = opts.database or ""
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local user = opts.user or ""
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local database = opts.database or ''
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local user = opts.user or ''
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local charset = CHARSET_MAP[opts.charset or "_default"]
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local charset = CHARSET_MAP[opts.charset or '_default']
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if not charset then
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return nil, "charset '" .. opts.charset .. "' is not supported"
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return nil, 'charset \'' .. opts.charset .. '\' is not supported'
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end
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local pool = opts.pool
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local host = opts.host
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if host then
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local port = opts.port or 3306
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if not pool then
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pool = user .. ":" .. database .. ":" .. host .. ":" .. port
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end
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ok, err = sock:connect(host, port, { pool = pool })
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else
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local path = opts.path
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if not path then
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return nil, 'neither "host" nor "path" options are specified'
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end
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if not pool then
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pool = user .. ":" .. database .. ":" .. path
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end
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ok, err = sock:connect("unix:" .. path, { pool = pool })
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end
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local port = opts.port or 3306
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ok, err = sock:connect(host, port)
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if not ok then
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return nil, 'failed to connect: ' .. err
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end
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local reused = sock:getreusedtimes()
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if reused and reused > 0 then
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self.state = STATE_CONNECTED
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return 1
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end
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local packet, typ, err = _recv_packet(self)
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if not packet then
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return nil, err
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end
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if typ == "ERR" then
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if typ == 'ERR' then
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local errno, msg, sqlstate = _parse_err_packet(packet)
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return nil, msg, errno, sqlstate
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end
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self.protocol_ver = strbyte(packet)
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--print("protocol version: ", self.protocol_ver)
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--print('protocol version: ', self.protocol_ver)
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local server_ver, pos = _from_cstring(packet, 2)
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if not server_ver then
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return nil, "bad handshake initialization packet: bad server version"
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return nil, 'bad handshake initialization packet: bad server version'
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end
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--print("server version: ", server_ver)
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--print('server version: ', server_ver)
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self._server_ver = server_ver
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local thread_id, pos = _get_byte4(packet, pos)
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--print("thread id: ", thread_id)
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--print('thread id: ', thread_id)
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local scramble = sub(packet, pos, pos + 8 - 1)
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if not scramble then
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return nil, "1st part of scramble not found"
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return nil, '1st part of scramble not found'
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end
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pos = pos + 9 -- skip filler
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@ -607,38 +613,38 @@ function _M.connect(self, opts)
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local capabilities -- server capabilities
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capabilities, pos = _get_byte2(packet, pos)
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-- print(format("server capabilities: %#x", capabilities))
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-- print(format('server capabilities: %#x', capabilities))
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self._server_lang = strbyte(packet, pos)
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pos = pos + 1
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--print("server lang: ", self._server_lang)
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--print('server lang: ', self._server_lang)
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self._server_status, pos = _get_byte2(packet, pos)
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--print("server status: ", self._server_status)
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--print('server status: ', self._server_status)
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local more_capabilities
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more_capabilities, pos = _get_byte2(packet, pos)
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capabilities = bor(capabilities, lshift(more_capabilities, 16))
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--print("server capabilities: ", capabilities)
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--print('server capabilities: ', capabilities)
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-- local len = strbyte(packet, pos)
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local len = 21 - 8 - 1
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--print("scramble len: ", len)
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--print('scramble len: ', len)
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pos = pos + 1 + 10
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local scramble_part2 = sub(packet, pos, pos + len - 1)
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if not scramble_part2 then
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return nil, "2nd part of scramble not found"
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return nil, '2nd part of scramble not found'
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end
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scramble = scramble .. scramble_part2
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--print("scramble: ", _dump(scramble))
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--print('scramble: ', _dump(scramble))
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local client_flags = 0x3f7cf;
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@ -647,37 +653,37 @@ function _M.connect(self, opts)
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if use_ssl then
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if band(capabilities, CLIENT_SSL) == 0 then
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return nil, "ssl disabled on server"
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return nil, 'ssl disabled on server'
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end
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-- send a SSL Request Packet
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local req = _set_byte4(bor(client_flags, CLIENT_SSL))
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.. _set_byte4(self._max_packet_size)
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.. strchar(charset)
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.. strrep("\0", 23)
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.. strrep('\0', 23)
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local packet_len = 4 + 4 + 1 + 23
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local bytes, err = _send_packet(self, req, packet_len)
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if not bytes then
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return nil, "failed to send client authentication packet: " .. err
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return nil, 'failed to send client authentication packet: ' .. err
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end
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local ok, err = sock:sslhandshake(false, nil, ssl_verify)
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if not ok then
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return nil, "failed to do ssl handshake: " .. (err or "")
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return nil, 'failed to do ssl handshake: ' .. (err or '')
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end
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end
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local password = opts.password or ""
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local password = opts.password or ''
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local token = _compute_token(password, scramble)
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--print("token: ", _dump(token))
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--print('token: ', _dump(token))
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local req = _set_byte4(client_flags)
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.. _set_byte4(self._max_packet_size)
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.. strchar(charset)
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.. strrep("\0", 23)
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.. strrep('\0', 23)
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.. _to_cstring(user)
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.. _to_binary_coded_string(token)
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.. _to_cstring(database)
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@ -685,19 +691,19 @@ function _M.connect(self, opts)
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local packet_len = 4 + 4 + 1 + 23 + #user + 1
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+ #token + 1 + #database + 1
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-- print("packet content length: ", packet_len)
|
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-- print("packet content: ", _dump(concat(req, "")))
|
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-- print('packet content length: ', packet_len)
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-- print('packet content: ', _dump(concat(req, '')))
|
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local bytes, err = _send_packet(self, req, packet_len)
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if not bytes then
|
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return nil, "failed to send client authentication packet: " .. err
|
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return nil, 'failed to send client authentication packet: ' .. err
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end
|
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|
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--print("packet sent ", bytes, " bytes")
|
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--print('packet sent ', bytes, ' bytes')
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local packet, typ, err = _recv_packet(self)
|
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if not packet then
|
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return nil, "failed to receive the result packet: " .. err
|
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return nil, 'failed to receive the result packet: ' .. err
|
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end
|
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|
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if typ == 'ERR' then
|
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@ -706,11 +712,11 @@ function _M.connect(self, opts)
|
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end
|
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|
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if typ == 'EOF' then
|
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return nil, "old pre-4.1 authentication protocol not supported"
|
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return nil, 'old pre-4.1 authentication protocol not supported'
|
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end
|
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|
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if typ ~= 'OK' then
|
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return nil, "bad packet type: " .. typ
|
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return nil, 'bad packet type: ' .. typ
|
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end
|
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|
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self.state = STATE_CONNECTED
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@ -718,37 +724,10 @@ function _M.connect(self, opts)
|
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return 1
|
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end
|
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|
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|
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function _M.set_keepalive(self, ...)
|
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local sock = self.sock
|
||||
if not sock then
|
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return nil, "not initialized"
|
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end
|
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|
||||
if self.state ~= STATE_CONNECTED then
|
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return nil, "cannot be reused in the current connection state: "
|
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.. (self.state or "nil")
|
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end
|
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|
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self.state = nil
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return sock:setkeepalive(...)
|
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end
|
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|
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|
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function _M.get_reused_times(self)
|
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local sock = self.sock
|
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if not sock then
|
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return nil, "not initialized"
|
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end
|
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|
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return sock:getreusedtimes()
|
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end
|
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|
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|
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function _M.close(self)
|
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local sock = self.sock
|
||||
if not sock then
|
||||
return nil, "not initialized"
|
||||
return nil, 'not initialized'
|
||||
end
|
||||
|
||||
self.state = nil
|
||||
@ -761,21 +740,19 @@ function _M.close(self)
|
||||
return sock:close()
|
||||
end
|
||||
|
||||
|
||||
function _M.server_ver(self)
|
||||
return self._server_ver
|
||||
end
|
||||
|
||||
|
||||
local function send_query(self, query)
|
||||
if self.state ~= STATE_CONNECTED then
|
||||
return nil, "cannot send query in the current context: "
|
||||
.. (self.state or "nil")
|
||||
return nil, 'cannot send query in the current context: '
|
||||
.. (self.state or 'nil')
|
||||
end
|
||||
|
||||
local sock = self.sock
|
||||
if not sock then
|
||||
return nil, "not initialized"
|
||||
return nil, 'not initialized'
|
||||
end
|
||||
|
||||
self.packet_no = -1
|
||||
@ -790,22 +767,21 @@ local function send_query(self, query)
|
||||
|
||||
self.state = STATE_COMMAND_SENT
|
||||
|
||||
--print("packet sent ", bytes, " bytes")
|
||||
--print('packet sent ', bytes, ' bytes')
|
||||
|
||||
return bytes
|
||||
end
|
||||
_M.send_query = send_query
|
||||
|
||||
|
||||
local function read_result(self, est_nrows)
|
||||
if self.state ~= STATE_COMMAND_SENT then
|
||||
return nil, "cannot read result in the current context: "
|
||||
.. (self.state or "nil")
|
||||
return nil, 'cannot read result in the current context: '
|
||||
.. (self.state or 'nil')
|
||||
end
|
||||
|
||||
local sock = self.sock
|
||||
if not sock then
|
||||
return nil, "not initialized"
|
||||
return nil, 'not initialized'
|
||||
end
|
||||
|
||||
local packet, typ, err = _recv_packet(self)
|
||||
@ -813,7 +789,7 @@ local function read_result(self, est_nrows)
|
||||
return nil, err
|
||||
end
|
||||
|
||||
if typ == "ERR" then
|
||||
if typ == 'ERR' then
|
||||
self.state = STATE_CONNECTED
|
||||
|
||||
local errno, msg, sqlstate = _parse_err_packet(packet)
|
||||
@ -823,7 +799,7 @@ local function read_result(self, est_nrows)
|
||||
if typ == 'OK' then
|
||||
local res = _parse_ok_packet(packet)
|
||||
if res and band(res.server_status, SERVER_MORE_RESULTS_EXISTS) ~= 0 then
|
||||
return res, "again"
|
||||
return res, 'again'
|
||||
end
|
||||
|
||||
self.state = STATE_CONNECTED
|
||||
@ -833,16 +809,16 @@ local function read_result(self, est_nrows)
|
||||
if typ ~= 'DATA' then
|
||||
self.state = STATE_CONNECTED
|
||||
|
||||
return nil, "packet type " .. typ .. " not supported"
|
||||
return nil, 'packet type ' .. typ .. ' not supported'
|
||||
end
|
||||
|
||||
-- typ == 'DATA'
|
||||
|
||||
--print("read the result set header packet")
|
||||
--print('read the result set header packet')
|
||||
|
||||
local field_count, extra = _parse_result_set_header_packet(packet)
|
||||
|
||||
--print("field count: ", field_count)
|
||||
--print('field count: ', field_count)
|
||||
|
||||
local cols = new_tab(field_count, 0)
|
||||
for i = 1, field_count do
|
||||
@ -860,8 +836,8 @@ local function read_result(self, est_nrows)
|
||||
end
|
||||
|
||||
if typ ~= 'EOF' then
|
||||
return nil, "unexpected packet type " .. typ .. " while eof packet is "
|
||||
.. "expected"
|
||||
return nil, 'unexpected packet type ' .. typ .. ' while eof packet is '
|
||||
.. 'expected'
|
||||
end
|
||||
|
||||
-- typ == 'EOF'
|
||||
@ -871,7 +847,7 @@ local function read_result(self, est_nrows)
|
||||
local rows = new_tab(est_nrows or 4, 0)
|
||||
local i = 0
|
||||
while true do
|
||||
--print("reading a row")
|
||||
--print('reading a row')
|
||||
|
||||
packet, typ, err = _recv_packet(self)
|
||||
if not packet then
|
||||
@ -881,10 +857,10 @@ local function read_result(self, est_nrows)
|
||||
if typ == 'EOF' then
|
||||
local warning_count, status_flags = _parse_eof_packet(packet)
|
||||
|
||||
--print("status flags: ", status_flags)
|
||||
--print('status flags: ', status_flags)
|
||||
|
||||
if band(status_flags, SERVER_MORE_RESULTS_EXISTS) ~= 0 then
|
||||
return rows, "again", cols
|
||||
return rows, 'again', cols
|
||||
end
|
||||
|
||||
break
|
||||
@ -907,17 +883,15 @@ local function read_result(self, est_nrows)
|
||||
end
|
||||
_M.read_result = read_result
|
||||
|
||||
|
||||
function _M.query(self, query, est_nrows)
|
||||
local bytes, err = send_query(self, query)
|
||||
if not bytes then
|
||||
return nil, "failed to send query: " .. err
|
||||
return nil, 'failed to send query: ' .. err
|
||||
end
|
||||
|
||||
return read_result(self, est_nrows)
|
||||
end
|
||||
|
||||
|
||||
function _M.set_compact_arrays(self, value)
|
||||
self.compact = value
|
||||
end
|
||||
|
||||
Loading…
Reference in New Issue
Block a user