专做定制旅游网站有哪些,最新新闻十条,网站关键词分隔符,东营企业网站seoRate Limiting限流插件
https://docs.konghq.com/hub/kong-inc/rate-limiting/
它可以针对consumer ,credential ,ip ,service,path,header 等多种维度来进行限流.流量控制的精准度也有多种方式可以参考,比如可以做到秒级,分钟级,小时级等限流控制. 基于IP限流
源码地址 kong/kong/plugins/ip-restriction/handler.lua at master · Kong/kong · GitHub
local lrucache require resty.lrucache
local ipmatcher require resty.ipmatcher
local kong_meta require kong.metalocal error error
local kong kong
local log kong.log
local ngx_var ngx.varlocal IPMATCHER_COUNT 512
local IPMATCHER_TTL 3600
local cache lrucache.new(IPMATCHER_COUNT)local IpRestrictionHandler {PRIORITY 990,VERSION kong_meta.version,
}local isempty
dolocal tb_isempty require table.isemptyisempty function(t)return t nil or tb_isempty(t)end
endlocal function do_exit(status, message)status status or 403message message orstring.format(IP address not allowed: %s, ngx_var.remote_addr)log.warn(message)return kong.response.error(status, message)
endlocal function match_bin(list, binary_remote_addr)local matcher, errmatcher cache:get(list)if not matcher thenmatcher, err ipmatcher.new(list)if err thenreturn error(failed to create a new ipmatcher instance: .. err)endcache:set(list, matcher, IPMATCHER_TTL)endlocal is_matchis_match, err matcher:match_bin(binary_remote_addr)if err thenreturn error(invalid binary ip address: .. err)endreturn is_match
endlocal function do_restrict(conf)local binary_remote_addr ngx_var.binary_remote_addrif not binary_remote_addr thenreturn do_exit(403,Cannot identify the client IP address, ..unix domain sockets are not supported.)endlocal deny conf.denyif not isempty(deny) thenlocal blocked match_bin(deny, binary_remote_addr)if blocked thenreturn do_exit(conf.status, conf.message)endendlocal allow conf.allowif not isempty(allow) thenlocal allowed match_bin(allow, binary_remote_addr)if not allowed thenreturn do_exit(conf.status, conf.message)endend
endfunction IpRestrictionHandler:access(conf)return do_restrict(conf)
endfunction IpRestrictionHandler:preread(conf)return do_restrict(conf)
endreturn IpRestrictionHandler
