a simple url shortener in Go (check it out at qurl.org)
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package main
import (
"flag"
"fmt"
"net"
"net/http"
"os"
"qurl/pages"
"qurl/static"
"qurl/storage"
"runtime"
)
//go:generate bindata -m Assets -r assets -p static -o static/assets.go assets
func main() {
dburl := flag.String("u", "bolt:./qurl.db", "url to database")
lsaddr := flag.String("l", "127.0.0.1:8080", "listen address/port")
jsonfile := flag.String("j", "", "path to json to load into database")
maxpro := flag.Int("m", runtime.NumCPU()+2,
"maximum number of threads to use")
flag.Parse()
if *maxpro < 3 {
fmt.Fprintf(os.Stderr, "Thread limit too low: %d (min 3)\n", *maxpro)
return
}
// Limit max processes
runtime.GOMAXPROCS(*maxpro)
// Open storage backend
stor, err := storage.NewStorage(*dburl)
if err != nil {
fmt.Fprintf(os.Stderr, "Database connection error: %s\n", err.Error())
return
}
defer stor.Shutdown()
// Load data if asked
if *jsonfile != "" {
err := loadjson(stor, *jsonfile)
if err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return
}
}
// Open listener port
listen, err := net.Listen("tcp", *lsaddr)
if err != nil {
fmt.Fprintf(os.Stderr, "Listen error: %s\n", err.Error())
return
}
mux := http.NewServeMux()
mux.Handle("/index.html", &static.StaticContent{Content: "index.html"})
mux.Handle("/favicon.ico", &static.StaticContent{Content: "favicon.ico"})
mux.Handle("/qurl.css", &static.StaticContent{Content: "qurl.css"})
submit := &pages.SubmitHandler{Storage: stor}
err = submit.Init()
if err != nil {
fmt.Fprintf(os.Stderr, "Submit init error: %s\n", err.Error())
return
}
mux.Handle("/submit.html", submit)
fmt.Fprintf(os.Stdout, "qurl listening .. \n")
err = http.Serve(listen, mux)
if err != nil {
fmt.Fprintf(os.Stderr, "Serve error: %s\n", err.Error())
}
}