Hijack Phicomm K3 weather service to darksky weather API

weather.conf

server {
  listen 443 ssl;
  listen [::]:443 ssl;

  ssl_certificate certs/default.crt;
  ssl_certificate_key certs/default.key;

  server_name phiclouds.phicomm.com;

  access_log /var/log/nginx/weather-access.log;
  error_log /var/log/nginx/weather-error.log info;

  location / {
    content_by_lua_block {
      local code_map = {
        sunny = 0,
        cloudy = 4,
        ["partly-cloudy-day"] = 5,
        ["partly-cloudy-night"] = 6,
        rain = 13,
        wind = 32
      }
      local res = ngx.location.capture('/proxy')
      local cjson = require("cjson")
      local data = cjson.decode(res.body).hourly.data[1]

      ret = { data = {
        -- last_update = "2019-03-01T16:25:00+08:00",
        now = {
          code = tostring(code_map[data.icon]),
          text = data.icon,
          -- wind_scale = data.windSpeed,
          temperature = math.floor((data.temperature - 32) * 5 / 9),
          humidity = data.humidity * 100,
          -- wind_direction = data.windBearing,
        },
        -- name = "City",
      } }
      if not code_map[data.icon] then
        ngx.log(ngx.ERR, data.icon, " not defined in code_map")
      end
      ngx.say(cjson.encode(ret))
    }
  }

  location = /proxy {
    internal;
    proxy_pass "https://api.darksky.net/forecast/API KEY/30.12345,120.123456";
  }
}