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bookbrowser.go
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bookbrowser.go
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package main
import (
"io/ioutil"
"log"
"os"
"os/signal"
"path/filepath"
"strings"
"syscall"
"github.com/geek1011/BookBrowser/modules/server"
_ "github.com/geek1011/BookBrowser/formats/all"
"github.com/geek1011/BookBrowser/modules/sigusr"
"github.com/geek1011/BookBrowser/modules/util"
"github.com/urfave/cli"
)
var curversion = "dev"
func main() {
workdir, err := os.Getwd()
if err != nil {
log.Fatalf("Fatal error: %s\n", err)
}
deftempdir, err := ioutil.TempDir("", "bookbrowser")
if err != nil {
deftempdir = filepath.Join(workdir, "_temp")
}
app := cli.NewApp()
app.Name = "BookBrowser"
app.Usage = "Web-based eBook server supporting ePub and PDF."
app.Version = curversion
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "bookdir, b",
Value: workdir,
Usage: "Load books from `DIR`. The directory must exist.",
},
cli.StringFlag{
Name: "tempdir, t",
Value: deftempdir,
Usage: "Use `DIR` as the location for storing temporary files such as cover thumbnails. The directory is created on start and deleted on exit, unless it already exists.",
},
cli.StringFlag{
Name: "addr, a",
Value: ":8090",
Usage: "`ADDR` is the address to bind the server to. It is in the format IP:PORT. The IP is optional.",
},
cli.BoolFlag{
Name: "nocovers, n",
Usage: "Do not index covers",
},
}
app.HideHelp = true
app.Action = func(c *cli.Context) {
bookdir := c.String("bookdir")
tempdir := c.String("tempdir")
nocovers := c.Bool("nocovers")
noRemoveTempDir := false
addr := c.String("addr")
log.Printf("BookBrowser %s\n", curversion)
if _, err := os.Stat(bookdir); err != nil {
if os.IsNotExist(err) {
log.Fatalf("Fatal error: book directory %s does not exist\n", bookdir)
}
}
if fi, err := os.Stat(tempdir); err == nil || (fi != nil && fi.IsDir()) {
noRemoveTempDir = true
if tempdir == deftempdir {
noRemoveTempDir = false
}
}
bookdir, err = filepath.Abs(bookdir)
if err != nil {
log.Fatalf("Fatal error: Could not resolve book directory %s: %s\n", bookdir, err)
}
if _, err := os.Stat(tempdir); os.IsNotExist(err) {
os.Mkdir(tempdir, os.ModePerm)
}
tempdir, err = filepath.Abs(tempdir)
if err != nil {
log.Fatalf("Fatal error: Could not resolve temp directory %s: %s\n", tempdir, err)
}
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
go func() {
<-sigs
if noRemoveTempDir {
log.Println("Not removing temp dir because dir already existed at start")
} else {
log.Println("Cleaning up temp dir")
os.RemoveAll(tempdir)
}
os.Exit(0)
}()
if !strings.Contains(addr, ":") {
log.Fatalln("Invalid listening address")
}
sp := strings.SplitN(addr, ":", 2)
if sp[0] == "" {
ip := util.GetIP()
if ip != nil {
log.Printf("This server can be accessed at http://%s:%s\n", ip.String(), sp[1])
}
}
s := server.NewServer(addr, bookdir, tempdir, curversion, true, nocovers)
s.RefreshBookIndex()
if len(*s.Books) == 0 {
log.Fatalln("Fatal error: no books found")
}
sigusr.Handle(func() {
log.Println("Booklist refresh triggered by SIGUSR1")
s.RefreshBookIndex()
})
err = s.Serve()
if err != nil {
log.Fatalf("Error starting server: %s\n", err)
}
}
app.Run(os.Args)
}