增加redis类进行redis数据库的操作

src/share/redis.lua

@@ -0,0 +1,62 @@
+local redis = require("resty.redis")
+local conf = require('config')
+
+local _M = setmetatable({}, {__index=function(self, key)
+	local red = redis:new()
+	local ok,err = red:connect(conf.REDIS.HOST, conf.REDIS.POST, conf.REDIS.PASSWORD)
+	if not ok then
+		ngx.log(ngx.ERR, err)
+	end
+	if key == 'red' then
+		return red
+	end
+end})
+
+function _M:set(key, value, time)
+	local ok, err = self.red:set(key, value)
+	if not ok then
+	    return false, "redis failed to set data: " .. err
+	end
+	if time then
+		ok,err = self.red:expire(key, time) -- default expire time is seconds
+		if not ok then
+			return false,err
+		end
+	end
+	return true
+end
+
+function _M:get(key)
+	local value = self.red:get(key)
+	if value == ngx.null then
+		return nil
+	else
+		return value
+	end
+end
+
+function _M:del(key)
+	return self.red:del(key)
+end
+
+function _M:expire(key, time)
+	local ok,err = self.red:expire(key, time) -- default time is seconds
+	if not ok then
+		return false,err
+	end
+	return true
+end
+
+function _M:incr(key)
+	local ok,err = self.red:incr(key)
+	if not ok then
+		return false, err
+	end
+	return true
+end
+
+function _M:ttl(key)
+	return self.red:ttl(key)
+end
+
+return _M