66 lines
1.4 KiB
Lua
66 lines
1.4 KiB
Lua
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#!/usr/bin/lua
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local json = require("json")
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local server = require("nginx.websocket.server")
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local sqlite = require("lsqlite3")
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local basepath = "/home/paul/git/micodus_server"
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local dbfile = string.format("%s/data/tracker.db",basepath)
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local query = [[
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SELECT time,latitude,longitude,height,speed,direction,serial
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FROM log
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ORDER BY time DESC
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LIMIT 1;
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]]
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--ngx.shared.geo:set("last_time","")
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function getdata()
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local db = sqlite.open(dbfile,sqlite3.OPEN_READONLY)
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local res, vm = db:nrows(query)
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local data
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for row in res, vm do
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data = {
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["time"]=row.time,
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["latitude"]=row.latitude,
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["longitude"]=row.longitude,
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["height"]=row.height,
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["speed"]=row.speed,
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["direction"]=row.direction,
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["serial"]=row.serial,
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}
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end
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db:close()
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return data
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end
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function geows()
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local locstr = nil
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local wb, err = server:new {
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timeout = 5000,
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max_payload_len = 65535
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}
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if not wb then
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ngx.log(ngx.ERR, "failed to new websocket: ", err)
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return ngx.exit(444)
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end
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local last_time = nil
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while true do
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local data = getdata()
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if data.time ~= last_time then
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local locstr = json.encode(data)
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local bytes, err = wb:send_text(locstr)
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if not bytes then
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ngx.log(ngx.ERR, "failed to send text: ", err)
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return ngx.exit(444)
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end
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last_time = data.time
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end
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ngx.sleep(1)
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end
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wb:send_close()
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end
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geows()
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