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main.go
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main.go
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package main
import (
"fmt"
"io/ioutil"
"os"
"flag"
"gopkg.in/yaml.v3"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"net/http"
)
type Config struct {
Port *int `json:"port"`
Data *string `json:"data"`
}
func readConfig(filename string) (*Config,error) {
config := &Config{
Port: new(int),
Data: new(string),
}
// Default values
*config.Port = 3000
*config.Data = "public"
log.Info().Str("file",filename).Msg("Reading configuration")
buffer, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
err = yaml.Unmarshal(buffer, config)
if err != nil {
return nil, err
}
return config, nil
}
func main() {
log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stdout})
filename := flag.String("config","config.yaml","configuration file localtion")
flag.Parse()
config , err := readConfig(*filename)
if err != nil {
log.Error().Err(err).Msg("Can't read configuration")
os.Exit(1)
}
log.Info().Interface("config", *config).Msg("Config read")
http.Handle("/", http.FileServer(http.Dir(*config.Data)))
log.Info().Msg("Serving...")
bindAddr := fmt.Sprintf(":%d",*config.Port)
log.Info().Str("addr", bindAddr).Msg("Serving...")
err = http.ListenAndServe(bindAddr, nil)
if err != nil {
log.Error().Err(err).Msg("can't start server")
os.Exit(1)
}
os.Exit(0)
}