mapserver/app/config.go

package app

import (
	"encoding/json"
	"io/ioutil"
	"os"
)

type Config struct {
	Port                   int  `json:"port"`
	EnableInitialRendering bool `json:"enableinitialrendering"`
}

func ParseConfig(filename string) (*Config, error) {
	cfg := Config{
		Port:                   80,
		EnableInitialRendering: true,
	}

	info, err := os.Stat(filename)
	if info != nil && err == nil {
		data, err := ioutil.ReadFile(filename)
		if err != nil {
			return nil, err
		}

		err = json.Unmarshal(data, &cfg)
		if err != nil {
			return nil, err
		}
	}

	return &cfg, nil
}