probe-clear-shop-cache.lua

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-- Internal function
------------------------------------------------------------------------------------- 
function delete_by_wild (red, wild)
  local result, err = red:keys(wild)
  if not result then
      ngx.say("failed to get keys : " .. wild .. ", reason :", err)
      return nil
  end
  for i, k in ipairs(result) do
      red:del(k)
  end
  return true
end

function init_redis()
  local redis = require "resty.redis"
  local red = redis:new()
  red:set_timeout(1000)

  local ok, err = red:connect("redis.server.address.com", 6379)
  if not ok then
      ngx.say("failed to connect: ", err)
      return false
  end

  local res, err = red:auth("instanceId:password")
  if not res then
      ngx.say("failed to authenticate: ", err)
      return false
  end

  -- add commands
  red:add_commands("keys","del")
  ngx.say(" ** add commands ok ** ")
  return red
end

function delete_shop (red, merchant_id, probe_sn_list) 
  delete_by_wild(red, "probe_online_" .. merchant_id)
  for i, probe in ipairs(probe_sn_list) do
    delete_by_wild(red, "probe_online_1001_" .. probe)
  end
  
  delete_by_wild(red, "probe_visitor_*_" .. merchant_id)
  for i, probe in ipairs(probe_sn_list) do
    delete_by_wild(red, "probe_visitor_*_1001_" .. probe)
  end
  
  delete_by_wild(red, "dev_merchant_probe_status_" .. merchant_id)
  delete_by_wild(red, "dev_merchant_last_leave_" .. merchant_id)
  delete_by_wild(red, "dev_merchant_online_probe_" .. merchant_id)
end
  
  
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--
-- Main handler
--
------------------------------------------------------------------------------------- 

local red = init_redis()
if not red then
   ngx.say("initailize redis failed")
   return
end

-- do delete

delete_shop(red, "bf0cf2586dfe11e4a4eed8490b8ac7cb", {"P12015042101002808","P12015042101002807","P12015042101002809"})

ngx.say("Sir, It's finished. ( Lua is a pretty Girl ! )")

-- or just close the connection right away:
local ok, err = red:close()
if not ok then
    ngx.say("failed to close: ", err)
    return
end

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lua_package_path "/usr/local/lib/lua/resty/redis.lua;;";

server {
    listen 9119;
    server_name china-tree.com;
    location /probe/clear/shop/cache/ {
        content_by_lua_file /home/admin/nginx/conf/probe-clear-shop-cache.lua;
    }
}