初始化提交

doc/nginx/lua/redisOps.lua

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+-- 导入redis的Lua模块
+local redis = require('resty.redis')
+-- 初始化redis
+local red = redis:new()
+red:set_timeouts(1000, 1000, 1000)
+
+-- 关闭redis连接的工具方法，其实是放入连接池
+local function close_redis(red)
+    local pool_max_idle_time = 10000 -- 连接的空闲时间，单位是毫秒
+    local pool_size = 100 --连接池大小
+    local ok, err = red:set_keepalive(pool_max_idle_time, pool_size)
+    if not ok then
+        ngx.log(ngx.ERR, "放入redis连接池失败: ", err)
+    end
+end
+
+-- 查询redis的方法 ip和port是redis地址，key是查询的key
+local function read_redis(ip, port, key)
+    -- 获取一个连接
+    local ok, err = red:connect(ip, port)
+    if not ok then
+        ngx.log(ngx.ERR, "连接redis失败 : ", err)
+        return nil
+    end
+    -- 查询redis
+    local resp, err = red:get(key)
+    -- 查询失败处理
+    if not resp then
+        ngx.log(ngx.ERR, "查询Redis失败: ", err, ", key = " , key)
+    end
+    --得到的数据为空处理
+    if resp == ngx.null then
+        resp = nil
+        ngx.log(ngx.ERR, "查询Redis数据为空, key = ", key)
+    end
+    close_redis(red)
+    return resp
+end
+
+-- 封装函数，发送http请求，并解析响应
+local function read_http(path, params)
+    local resp = ngx.location.capture(path,{
+        method = ngx.HTTP_GET,
+        args = params,
+    })
+    if not resp then
+        -- 记录错误信息，返回404
+        ngx.log(ngx.ERR, "http查询失败, path: ", path , ", args: ", args)
+        ngx.exit(404)
+    end
+    return resp.body
+end
+-- 将方法导出
+local _M = {
+    read_http = read_http,
+    read_redis = read_redis
+}
+return _M