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// dbasik provides a service with which to convert spreadsheets containing
// data to JSON for further processing.
// Copyright (C) 2024 M R Lemon
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"flag"
"fmt"
"log/slog"
"net/http"
"os"
"time"
)
const version = "0.0.1"
// holds the config for our application
// We will read this from the command line flags when we run the application
type config struct {
port int
env string
}
// This application struct holds the dependencies for our HTTP handlers, helpers and
// middleware.
type application struct {
config config
logger *slog.Logger
}
func main() {
// Instance of config
var cfg config
// Read the flags into the config struct. Defaults are provided if none given.
flag.IntVar(&cfg.port, "port", 4000, "API server port")
flag.StringVar(&cfg.env, "env", "development", "Environment (development|staging|production)")
flag.Parse()
// Initialize a new structured logger which writes to stdout
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
// An instance of application struct, containing the config struct and the logger
app := &application{
config: cfg,
logger: logger,
}
// Declare an http server which listens provided in the config struct and has
// sensible timeout settings and writes log messages to the structured logger at
// Error level.
srv := &http.Server{
Addr: fmt.Sprintf(":%d", cfg.port),
Handler: app.routes(),
IdleTimeout: time.Minute,
ReadTimeout: 5 * time.Second,
WriteTimeout: 10 * time.Second,
ErrorLog: slog.NewLogLogger(logger.Handler(), slog.LevelError),
}
logger.Info("starting server", "addr", srv.Addr, "env", cfg.env)
err := srv.ListenAndServe()
logger.Error(err.Error())
os.Exit(1)
}
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