kong自定义插件实现——使用post发送请求

kong插件机制

代码实现

-- handler.lua
local BasePlugin    = require "kong.plugins.base_plugin"
-- 调用模块
local zhttp = require "resty.http" #一个resty 包，需要下载到指定目录
local XngAuthHandler    = BasePlugin:extend()
local timeout = 5000
local uri = "http://localhost:8500/auth/v1/api/valid"
XngAuthHandler.VERSION  = "1.0.0"
XngAuthHandler.PRIORITY = 10 # 优先级

#在转发到你的服务之前，会走这个，所以在这里添加你的逻辑就可以
function XngAuthHandler:access(config)
  local httpc = zhttp.new()
  httpc:set_timeout(timeout)
  local res, err = httpc:request_uri(uri, {
    method = "POST",
    headers = kong.request.get_headers()#获取请求的所有头部
    }
  )
  httpc:set_keepalive(5000, 100)
  httpc:close()
  local mid = "0"
  if not res then
    kong.log.err("res is nil")
  else
    mid = res.headers["X-Mid"]
    if not mid then
      mid = "0"
    end
  end
  kong.service.request.set_header("X-Mid", mid)#透传到服务前，添加字段
end

return XngAuthHandler

一些概念参考文档：

https://cloud.tencent.com/developer/article/1489438

https://docs.konghq.com/getting-started-guide/latest/overview/

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