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wxMsgProxy.lua
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wxMsgProxy.lua
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---Wechat Message Proxy(Half Bi-directional)
-- 微信消息加解密
-- 明文模式 plian_mode：维持现有模式，没有适配加解密新特性，消息体明文收发，默认设置为明文模式
-- 兼容模式 cpt_mode：公众平台发送消息内容将同时包括明文和密文，消息包长度增加到原来的3倍左右；公众号回复明文或密文均可，不影响现有消息收发；开发者可在此模式下进行调试
-- 安全模式（推荐）safe_mode：公众平台发送消息体的内容只含有密文，公众账号回复的消息体也为密文，建议开发者在调试成功后使用此模式收发消息
--
--- Program Begin
---以下path env正式上线后可写入nginx的配置中
package.path = package.path .. ";/srv/wxproxy/pkgs/lua/?.lua;/srv/wxproxy/pkgs/lua/?/init.lua"
package.cpath = package.cpath .. ";/srv/wxproxy/pkgs/lib/?.so"
--模块加载
local redis = require("resty.redis")
local mysql = require("resty.mysql")
--以下线上植入nginx的配置中
local cjson = require("cjson")
require("wxutil")
---参数配置
dofile('/srv/wxproxy/config/init.lua')
-- -- local function Begin
local function close_redis(red)
if not red then
return
end
local ok, err =red:close()
if not ok then
ngx.say("close redis error :" , err)
end
end
local function close_mysql(db)
if not db then
return
end
local ok, err = db:close()
if not ok then
ngx.say('close mysql error : ', err)
end
end
local function to_hex(str)
return ({str:gsub(".", function(c) return string.format("%02X", c:byte(1)) end)})[1]
end
--sha1
local function sha1(str)
return string.lower(to_hex(ngx.sha1_bin(str)))
end
local function prTable(tbl)
for k,v in pairs(tbl) do
if type(v) == 'table' then
ngx.say(k,":",table.concat(v))
elseif type(v) == 'function' then
ngx.say(k,":","function")
else
ngx.say(k,":",v)
end
end
end
--微信服务器请求签名检测
local function checkSignature(timestamp,nonce,token,signature)
local tmpArr={timestamp,token,nonce}
table.sort(tmpArr)
local tmpStr = table.concat(tmpArr)
if signature == sha1(tmpStr) then
return true;
else
return false;
end
end
----入队列 todo: 出错处理
local function push_queue(msg,channel,ttr,red)
local id, err = red:incr(channel .. ".message_id")
local res,err = red:hset(channel ..".messages", id, ttr ..";" ..msg)
local res,err = red:lpush(channel .. ".waiting", id)
end
-- 微信事件处理
-- 关注回复
local function subscribe_ev(wxobj,data)
local ret,err = wxobj:toXml(
{
ToUserName = data['FromUserName'],
FromUserName = data['ToUserName'],
CreateTime = os.time(),
MsgType = 'text',
Content = data['subscription']
})
if ret then
ngx.say(ret);
else
ngx.say('')
end
end
local function unsubscribe_ev(red,id)
-- 删除open_id对应的信息
red:hdel("pstats",id)
ngx.say('')
end
--
local function exit(red,db,status)
collectgarbage()
close_redis(red)
close_mysql(db)
ngx.exit(status)
end
-- --function END
local setting = getSetting()
local redis_conn = setting.redis_conn
local mysql_conn = setting.mysql_conn
--local variables
local method_name = ngx.req.get_method()
local uri = ngx.var.uri
local server_name = ngx.var.server_name
local scheme = ngx.var.scheme
local request = ngx.var.request
local remote_addr = ngx.var.remote_addr
local hostname = ngx.var.hostname
local args, err = ngx.req.get_uri_args()
local ok, error, res, sqlstate, errno
local open_id, token, aeskey,keywords,appid,MsgSignature,subscription
local rtflag = {
OK=0,
ValidateSignature_Error = -40001,
ParseXml_Error = -40002,
ComputeSignature_Error = -40003,
IllegalAesKey = -40004,
ValidateAppid_Error = -40005,
EncryptAES_Error = -40006,
DecryptAES_Error = -40007,
IllegalBuffer = -40008,
EncodeBase64_Error = -40009,
DecodeBase64_Error = -40010,
GenReturnXml_Error = -40011,
GenLuaTable_error = -40012,
ValidateLuaTable_error =-40013,
}
local qMsg --入队信息结构
local idInfo --用户访问信息
local sql_1=''
local sql_2=''
local Event_trigger = {
'scancode_waitmsg', --扫码推事件且弹出“消息接收中”提示框的事件推送
'scancode_push', --扫码推事件的事件推送
'CLICK', --点击菜单拉取消息时的事件推送
'SCAN' --扫码事件
}
-- Wechat Event process function table
local wx_ev_fun_tbl ={
subscribe=subscribe_ev,
unsubscribe=unsubscribe_ev
}
if not args['shop_id'] or not args['timestamp'] or not args['nonce'] or not args['signature'] then
ngx.say('params are invalid!')
return
end
local red, err = redis:new()
red:set_timeout(1000) -- 1 sec
if redis_conn.host ~='' then
ok, error = red:connect(redis_conn.host, redis_conn.port, redis_conn.database)
else
ok, error = red:connect(redis_conn.unixsocket,redis_conn.database)
end
if not ok then
ngx.say("failed to connect: ", err)
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
red:select(redis_conn.database) --源库无法在connect方法选择数据库
if redis_conn.password ~='' then
res, err = red:auth(redis_conn)
if not res then
ngx.say("failed to authenticate: ", err)
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
end
local wxset, err = red:get("wxbus:" .. args['shop_id'])
if args['openid'] then
open_id = args['openid']
--设置用户:openid本次访问时间戳到缓存
idInfo, err = red:hget("pstats", open_id)
if idInfo ~=ngx.null or not idInfo then
idInfo = cjson.decode(tostring(idInfo))
idInfo.timestamp = args['timestamp']
else
idInfo = {}
idInfo.open_id = open_id
idInfo.timestamp = args['timestamp']
sql_1 = " select a.member_id ,a.tag_name,b.member_name,b.tele_sales_staff_id,b.sales_staff_id, b.shop_id from md_pam_bind_tag a inner join md_member b on a.member_id=b.member_id " ..
"where a.open_id='" .. open_id .. "' and a.tag_type='weixin' and a.flag=0;" --and b.shop_id='" .. args['shop_id'] .."';"
-- if not db then
-- end
-- res, err, errno, sqlstate =
-- db:query("select * from md_pam_bind_tag where open_id='" .. open_id .. "' and flag=0;")
-- if not res then
-- ngx.say("bad result: ", err, ": ", errno, ": ", sqlstate, ".")
-- return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
-- end
-- red:set("wxbus_openid:" .. open_id,[[{"open_id":"]] ..open_id..[[","timestamp":"]]..args['timestamp']..[["}]])
end
else
open_id = ''
end
if wxset ~=ngx.null or not wxset then
local wt = cjson.decode(tostring(wxset))
token = wt['token']
aeskey = wt['aeskey']
keywords = wt['keywords']
appid = wt['appid']
subscription = wt['subscription']
red:set("wxbus:" .. args['shop_id'], cjson.encode(wt))
else
sql_2 = "select * from md_wechat_config where shop_id='" .. args['shop_id'] .. "';"..
"select keywords,content from md_wechat_keywords where shop_id='" .. args['shop_id'] .. "' and flag<>'1';"
end
if sql_2 ~='' or sql_1 ~='' then
local db, err = mysql:new()
if not db then
ngx.say("failed to instantiate mysql: ", err)
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
db:set_timeout(1000) -- 1 sec
local dbconn = function()
local ok, err, errno, sqlstate = db:connect{
host = mysql_conn.host,
port = mysql_conn.port,
database = mysql_conn.database,
user = mysql_conn.user,
password = mysql_conn.password,
max_packet_size = 1024 * 1024 }
if not ok then
ngx.say("failed to connect: ", err, ": ", errno, " ", sqlstate)
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
end
-- ok, err = db:set_keepalive(10000, 100)
-- if not ok then
-- ngx.say("failed to set keepalive: ", err)
-- return
-- end
-- Mysql Server 后台原因，resty-mysql 有问题,一次connection 送一次send_query后断开
-- 按店铺设置缓存，PHP后台关键字回复、账号配置、关注回复需增添删除 wxbus:$shop_id 项
if sql_2 ~='' then
dbconn()
res, err, errno, sqlstate = db:query(sql_2)
if not res then
ngx.say("bad result: ", err, ": ", errno, ": ", sqlstate, ".")
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
wxset = res[1]
while err == "again" do
res, err, errno, sqlstate = db:read_result()
if not res then
ngx.log(ngx.ERR, "bad result #2: ", err, ": ", errno, ": ", sqlstate, ".")
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
end
-- wxset.timestamp = args['timestamp']
wxset['keywords'] = (not res and {}) or res
red:set("wxbus:" .. args['shop_id'], cjson.encode(wxset))
token = wxset['token']
aeskey = wxset['aeskey']
keywords = wxset['keywords']
appid = wxset['appid']
subscription = wxset['subscription']
end
-- 微信用户php绑定时需要处理，取消关注时需要将该idInfo删除
if sql_1 ~= '' then
dbconn()
res, err, errno, sqlstate = db:query(sql_1)
if not res then
ngx.say("bad result: ", err, ": ", errno, ": ", sqlstate, ".")
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
if res then
idInfo.member_info = res
-- idInfo.member_id =res.member_id
-- idInfo.member_name = res[1].member_name
-- idInfo.tag_name = res[1].tag_name
else
-- idInfo.member_id = 0
-- idInfo.member_name = 'Guest'
idInfo.member_info = {{member_id=0,member_name='Guest',shop_id=shop_id}}
end
end
end
---Check Signature
if not checkSignature(args['timestamp'],args['nonce'],token,args['signature']) then
return exit(red,db,ngx.HTTP_INTERNAL_SERVER_ERROR)
end
local encrypt_type = (args['encrypt_type'] and "AES" ) or ''
local encrypt_mode = {'plain','cpt','safe'}
local msgStruct = {
Msg_direc = 'IN', --IN,OUT,PXY
Msg_Plt_Type = 'wechat', --kefu,wechat...
Msg_Enc_Type = 'plain', --plain,cpt,safe
Msg_Enc_Sign = '',
Msg_Dep = args['shop_id'],
Msg_adapter = '',
Msg_Req_url = '',
Msg_lst_from = {}, --from='kefu',user=xxx
Msg_Param = {},
Msg_Body = {},
}
if method_name == "GET" then
if not args['echostr'] then
ngx.print('')
else
ngx.print(args['echostr'])
end
exit(red,db,ngx.HTTP_OK)
else
if not args['openid'] then
return exit(red,db,ngx.HTTP_OK)
end
ngx.req.read_body()
local raw_body =ngx.req.get_body_data()-- ngx.req.read_body() --ngx.req.get_body_data
if not raw_body then exit(red,db,ngx.HTTP_OK) end
local wxObj = wxutil:new(token, aeskey, appid, encrypt_type)
MsgSignature = (args['msg_signature'] and args['msg_signature'] ) or ''
-- open_id = args['openid']
local En_mode = encrypt_mode[1]
if encrypt_type then
if string.find(raw_body,"<FromUserName>") then
En_mode=encrypt_mode[2]
else
En_mode=encrypt_mode[3]
-- raw_body = "<xml><ToUserName><![CDATA[toUser]]></ToUserName><Encrypt><![CDATA["
-- .. raw_body .. "]]></Encrypt></xml>"
end
-- MsgSignature = args['msg_signature']
end
local ret,wxmsg_tbl = wxObj:getMsg(MsgSignature, args['timestamp'], args['nonce'], raw_body)
if ret == 0 then
if not wxmsg_tbl['MsgType'] then
ngx.say('')
return exit(red,db,ngx.HTTP_OK)
end
if not idInfo.msgid then
idInfo.msgid = wxmsg_tbl['MsgId']
else
-- 调试关闭
-- if idInfo.msgid == wxmsg_tbl['MsgId'] then
-- ngx.say('')
-- return exit(red,db,ngx.HTTP_OK)
-- end
end
if wxmsg_tbl['MsgType'] == 'event' then
--事件处理
local evt_fun = string.lower( wxmsg_tbl['Event'] )
if wx_ev_fun_tbl[evt_fun] then
if evt_fun =='subscribe' then
wx_ev_fun_tbl[evt_fun](wxObj,wxmsg_tbl)
end
if evt_fun == 'unsubscribe' then
wx_ev_fun_tbl[evt_fun](red,open_id)
end
else
local args_proxy = ''
for k,v in pairs(args) do
if args_proxy == '' then
args_proxy = k .. '=' .. v
else
args_proxy =args_proxy .. '&' .. k ..'='.. v
end
end
local body_str = 'ToUserName' .. wxmsg_tbl['ToUserName'] ..
'FromUserName' .. wxmsg_tbl['FromUserName'] ..
'CreateTime' .. wxmsg_tbl['CreateTime'] ..
'MsgType' .. wxmsg_tbl['MsgType'] ..
'Event' .. wxmsg_tbl['Event'] ..
'EventKey' .. wxmsg_tbl['EventKey']
local res_in = ngx.location.capture(
setting.real_wx_url,
{method = ngx.HTTP_POST, args = args_proxy,body = body_str}
)
ngx.say(res_in.body)
-- return exit(red,db,ngx.HTTP_OK)
end
else
msgStruct.Msg_Body =wxmsg_tbl;
msgStruct.Msg_Body.ProxyTime = os.time();
if wxmsg_tbl['MsgType'] == "text" then
ret = 0
-- 关键词回复
ret = table.foreach(keywords,function( i,v )
if wxmsg_tbl['Content']==keywords[i]['keywords'] then
local key_ret,key_err =
wxObj:toXml(
{
ToUserName = wxmsg_tbl['FromUserName'],
FromUserName = wxmsg_tbl['ToUserName'],
CreateTime = os.time(),
Content = keywords[i]['content'],
MsgType = 'text'
}
)
if key_ret then
ngx.say(key_ret)
else
ngx.say('')
end
return 1;
end
end)
msgStruct.Msg_adapter = setting.wxmsg_queue["text"].adapter
if not idInfo.last_from then
msgStruct.Msg_lst_from = {
from = idInfo.last_from,
user = idInfo.last_user
}
end
if ret == nil then
--文本消息
-- menu entry process
local wsg_content = wxmsg_tbl['Content']
if string.len(wsg_content)==1 then
local sw_ret,sw_err
if tonumber(wsg_content) == 0 then -- using (content)０ switch to kefu,1 to AI
-- idInfo.status =1 (kefu）， 0(ai)
idInfo.status = 1
sw_ret,sw_err =
wxObj:toXml(
{
ToUserName = wxmsg_tbl['FromUserName'],
FromUserName = wxmsg_tbl['ToUserName'],
CreateTime = os.time(),
Content = "欢迎进入人工客服模式！ \n（１＝>AI智能应答模式)",
MsgType = 'text'
}
)
if sw_ret then
ngx.say(sw_ret)
else
ngx.say('')
end
elseif tonumber(wsg_content) == 1 then
idInfo.status = 0
-- ngx.say("欢迎进入AI智能应答模式！")
sw_ret,sw_err =
wxObj:toXml(
{
ToUserName = wxmsg_tbl['FromUserName'],
FromUserName = wxmsg_tbl['ToUserName'],
CreateTime = os.time(),
Content = "欢迎进入AI智能应答模式！（０＝＞人工客服模式）",
MsgType = 'text'
}
)
if sw_ret then
ngx.say(sw_ret)
else
ngx.say('')
end
end
else
qMsg = cjson.encode(
{
class=setting.wxmsg_queue["text"].class,
data=msgStruct
}
)
push_queue(
qMsg,
setting.wxmsg_queue["text"].channel,
setting.wxmsg_queue["text"].ttr,red
)
ngx.say('') --返回空，防止重复发
end
end
else
--媒体消息
if next(setting.wxmsg_queue[wxmsg_tbl['MsgType']]) == nil then
ngx.log(ngx.WARN,'目前不支持：'.. setting.wxmsg_queue[wxmsg_tbl['MsgType']])
ngx.say('')
red.hset('pstats',open_id,red:encode(idInfo))
return exit(red,db,ngx.OK)
end
if idInfo.member_id ==0 then
ngx.say('未绑定用户不能发送'.. setting.wxmsg_queue[wxmsg_tbl['MsgType']].cn_name)
red.hset('pstats',open_id,red:encode(idInfo))
return exit(red,db,ngx.OK)
end
qMsg = cjson.encode(
{
class=setting.wxmsg_queue[wxmsg_tbl['MsgType']].class,
data=msgStruct
}
)
push_queue(
qMsg,
setting.wxmsg_queue[wxmsg_tbl['MsgType']].channel,
setting.wxmsg_queue[wxmsg_tbl['MsgType']].ttr,red
)
ngx.say('') --返回空，防止重复发
end
end
red:hset('pstats',open_id,cjson.encode(idInfo))
exit(red,db,ngx.HTTP_OK)
else
ngx.say('') --返回空
table.foreach(rtflag,function(k,v)
if ret == v then
ngx.say("error:",k," error_no:",v) --最后改写入log
exit(red,db,ngx.HTTP_OK)
end
end)
end
end
-- exit(red,db,ngx.HTTP_OK)
---Program End