/
main.go
125 lines (103 loc) · 2.46 KB
/
main.go
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package main
import (
"context"
"flag"
"fmt"
"log"
"os"
"os/signal"
"runtime/debug"
"syscall"
"github.com/levmv/imgserv/config"
"github.com/levmv/imgserv/params"
"github.com/levmv/imgserv/storage"
"github.com/levmv/imgserv/vips"
"golang.org/x/sync/semaphore"
)
const version = "0.1.1"
const help = `usage: imgserv <action>
actions:
server -config=<path to config.json>
stat [-config=<path to config.json>]
version`
var (
maxSem *semaphore.Weighted
queueSem *semaphore.Weighted
sign UrlSignature
imgStorage *storage.Cached
cfg *config.Config
)
func run(cfgPath string) error {
var err error
cfg, err = config.Parse(cfgPath)
if err != nil {
log.Fatal(err)
}
if cfg.Resizer.Presets != nil {
if err = params.InitPresets(string(cfg.Resizer.Presets)); err != nil {
log.Fatal(err)
}
}
if cfg.Server.MemoryLimit > 0 {
debug.SetMemoryLimit(cfg.Server.MemoryLimit)
}
if cfg.Server.LogFile != "" {
file, err := os.OpenFile(cfg.Server.LogFile, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0666)
if err != nil {
log.Fatal(err)
}
log.SetOutput(file)
}
sign = NewUrlSignature(cfg.Resizer.SignatureMethod, cfg.Resizer.SignatureSecret)
if err = vips.Init(nil); err != nil {
log.Fatal(err)
}
defer vips.Shutdown()
stop := make(chan os.Signal, 1)
signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
ctx, cancel := context.WithCancel(context.Background())
imgStorage, err = storage.NewCached(cfg.Storage)
if err != nil {
log.Fatalf("Fail to init storage: %v", err)
}
initUpload(cfg.Storage)
if cfg.Sharer != nil {
if err = initSharer(ctx, cfg.Sharer); err != nil {
log.Fatalf("Fail to init sharer: %v", err)
}
}
startServer(cancel, cfg.Server)
select {
case <-ctx.Done():
case <-stop:
}
return nil
}
func main() {
if len(os.Args) == 1 {
fmt.Println(help)
os.Exit(0)
}
var configArg string
serverCmd := flag.NewFlagSet("server", flag.ExitOnError)
serverCmd.StringVar(&configArg, "config", "./config.json", "path to config json file")
serverCmd.StringVar(&configArg, "c", "./config.json", "path to config json file (shorthand)")
action := os.Args[1]
switch action {
case "version":
fmt.Println(version)
case "server":
serverCmd.Parse(os.Args[2:])
if err := run(configArg); err != nil {
log.Fatal(err)
}
case "stat":
serverCmd.Parse(os.Args[2:])
if err := showStats(configArg); err != nil {
log.Fatal(err)
}
default:
fmt.Println("expected 'server', `stat` or 'version'")
os.Exit(1)
}
}