local ngx_var = ngx.var
local ngx_unescape_uri = ngx.unescape_uri
local next_ctx = ngx.ctx.next_ctx or {}
local type = type
local ipairs = ipairs

if type(next_ctx.replace_Mod) ~= "table" then
    return
end

local token_dict = ngx.shared.token_dict
local optl = require("optl")

-- 返回内容的替换使用 ngx.re.gsub 后续会更新用户可指定替换函数(如 ngx.re.sub)
local function ngx_2(reps,str_all)
    for _,v in ipairs(reps) do
        local tmp3 = optl.ngx_find(v[3])
        if v[2] == "" then
            str_all = ngx.re.gsub(str_all,v[1],tmp3)
        else
            str_all = ngx.re.gsub(str_all,v[1],tmp3,v[2])
        end
    end
    ngx.arg[1] = str_all
    token_dict:delete(token_tmp)
end

-- ngx.ctx.next_ctx.request_guid 一定要保证存在
local token_tmp = next_ctx.request_guid

if ngx.arg[1] ~= '' then -- 请求正常
    local chunk = token_dict:get(token_tmp)
    if not chunk then
        chunk = ngx.arg[1]
        token_dict:set(token_tmp,chunk,15)
    else
        chunk = chunk..ngx.arg[1]
        token_dict:set(token_tmp,chunk,15)
    end
end

local tmp_replace_mod = next_ctx.replace_Mod
if ngx.arg[2] then
    ngx_2(tmp_replace_mod.replace_list,token_dict:get(token_tmp))
else
    ngx.arg[1] = nil
end