参考
https://blog.csdn.net/orangleliu/article/details/50898014
利用redis的subscribe
参考 http://www.runoob.com/redis/pub-sub-subscribe.html
安装redis
brew install redis
安装openresty：
brew install openssl ./configure --prefix=/usr/local/openresty --with-openssl=/usr/local/Cellar/openssl/1.0.2o_1 make make install
openssl还是有问题 shared等
参考
https://blog.csdn.net/csdncqmyg/article/details/73835354
bundle/nginx-x-x-x(版本号)/auto/lib/openssl/conf
把.openssl删掉 ，只删这个单词
nginx调用的lua模块
ws_resdis_json.lua
local server = require "resty.websocket.server"
local redis = require "resty.redis"
local cjson = require "cjson"
--local channel_name = "chat"
local msg_id = 0
local wb, err = server:new{
timeout = 10000,
max_payload_len = 65535
}
if not wb then
ngx.log(ngx.ERR, "failed to new websocket: ", err)
return ngx.exit(444)
end
function creatChanel(channel_name)
push = function()
-- --create redis
local red = redis:new()
red:set_timeout(5000) -- 1 sec
local ok, err = red:connect("127.0.0.1", 6379)
if not ok then
ngx.log(ngx.ERR, "failed to connect redis: ", err)
wb:send_close()
return
end
--sub
local res, err = red:subscribe(channel_name)
if not res then
ngx.log(ngx.ERR, "failed to sub redis: ", err)
wb:send_close()
return
end
-- loop : read from redis
while true do
local res, err = red:read_reply()
if res then
local item = res[3]
local bytes, err = wb:send_text(tostring(msg_id).." "..item)
if not bytes then
-- better error handling
ngx.log(ngx.ERR, "failed to send text: ", err)
return ngx.exit(444)
end
msg_id = msg_id + 1
end
end
end
co = ngx.thread.spawn(push)
end
--main loop
while true do
local data, typ, err = wb:recv_frame()
if wb.fatal then
ngx.log(ngx.ERR, "failed to receive frame: ", err)
return ngx.exit(444)
end
if not data then
local bytes, err = wb:send_ping()
if not bytes then
ngx.log(ngx.ERR, "failed to send ping: ", err)
return ngx.exit(444)
end
ngx.log(ngx.ERR, "send ping: ", data)
elseif typ == "close" then
break
elseif typ == "ping" then
local bytes, err = wb:send_pong()
if not bytes then
ngx.log(ngx.ERR, "failed to send pong: ", err)
return ngx.exit(444)
end
elseif typ == "pong" then
ngx.log(ngx.ERR, "client ponged")
elseif typ == "text" then
--local json_str = '{"name": "Bruce.Lin", "age": 25}'
local json_str = data
local json = cjson.decode(json_str)
local channel_name = json["name"]
creatChanel(channel_name)
--send to redis
local red2 = redis:new()
red2:set_timeout(1000) -- 1 sec
local ok, err = red2:connect("127.0.0.1", 6379)
if not ok then
ngx.log(ngx.ERR, "failed to connect redis: ", err)
break
end
local res, err = red2:publish(channel_name, data)
if not res then
ngx.log(ngx.ERR, "failed to publish redis: ", err)
end
end
end
wb:send_close()
ngx.thread.wait(co)
nginx的配置文件
加入
location = /sredis {
content_by_lua_file conf/lua/ws_redis_json.lua;
}
客户端代码
{"name": "Bruce.Lin", "age": 25}
测试，进入聊天室
{"name": "Bruce.Lin", "age": 25}
name就是发给聊天室的name