lua-resty-websocket能不能在定时器里面主动发送数据到客户端

[omega-pw]

我试过用ngx.timer.every在websocket连接之后设置定时器，定时器能够正常执行，但是一到wb:send_text方法就报错，如果服务端不能主动推送数据，只能在wb:recv_frame()之后才能发送的话，就不如用简单的http请求了。
求帮助！

测试代码
local server = require "resty.websocket.server"
local wb, err = server:new{
timeout = 5000, -- in milliseconds
max_payload_len = 65535,
}
if not wb then
ngx.log(ngx.ERR, "failed to new websocket: ", err)
return ngx.exit(444)
end

ngx.timer.every(5, function (premature, wb)
ngx.log(ngx.ERR, nil == wb)
local bytes, err = wb:send_text("hello")--此处报错
if not bytes then
ngx.log(ngx.ERR, "failed to send text: ", err)
return ngx.exit(444)
end
end, wb)

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
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.INFO, "client ponged")
elseif typ == "text" then
local bytes, err = wb:send_text("hello")
if not bytes then
ngx.log(ngx.ERR, "failed to send text: ", err)
return ngx.exit(444)
end
end
end
wb:send_close()

[agentzh]

@omega4github Please, do not use Chinese here. This place is considered English only. If you
really want to use Chinese, please join and post to the openresty (Chinese)
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your cooperation.

[agentzh]

@omega4github Regarding your question, it is officially documented: https://github.com/openresty/lua-resty-websocket#limitations You are just using the websocket object in the wrong context.