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|
package sendoverhttp
import (
"fmt"
"io/fs"
"log"
"net"
"net/http"
"net/url"
"os"
"path/filepath"
"strconv"
)
// port is the IP port address to listen on.
const port = 8081
func preferredIP() (*net.IP, error) {
ips, err := net.InterfaceAddrs()
if err != nil {
return nil, err
}
for _, addr := range ips {
ipNet, ok := addr.(*net.IPNet)
if !ok {
continue
}
if ipNet.IP.IsLoopback() {
continue
}
return &ipNet.IP, nil
}
return nil, nil
}
type Server struct {
filepath string
closeCh chan struct{}
mr *MultiRunner
}
type SingleFileDir string
func (s SingleFileDir) Open(name string) (http.File, error) {
if name == "index.html" {
return nil, fs.ErrNotExist
}
fp := string(s)
stat, err := os.Stat(fp)
if err != nil {
return nil, err
}
if stat.IsDir() {
return http.Dir(fp).Open(name)
}
switch name {
case "/":
return nil, os.ErrNotExist
case "/" + filepath.Base(fp):
return os.Open(fp)
default:
return nil, os.ErrNotExist
}
}
func NewServer(fp string) *Server {
return &Server{
closeCh: make(chan struct{}),
filepath: fp,
mr: NewMultiRunner(),
}
}
func (s *Server) Start() error {
ip, err := preferredIP()
if err != nil {
return err
}
u := url.URL{
Scheme: "http",
Host: fmt.Sprintf("%s:%d", ip, port),
}
if stat, _ := os.Stat(s.filepath); !stat.IsDir() {
u.Path = filepath.Base(s.filepath)
}
qrCodeShower := NewTerminalQRShower(u.String())
go s.mr.Run(qrCodeShower)
httpRunner := NewRunner()
httpSrv := &http.Server{
Addr: ":" + strconv.Itoa(port),
}
var d http.FileSystem = http.Dir(s.filepath)
if stat, _ := os.Stat(s.filepath); !stat.IsDir() {
// Show user the name of the file
d = SingleFileDir(s.filepath)
}
httpSrv.Handler = http.FileServer(d)
httpRunner.OnStart = func() error {
l, err := net.Listen("tcp4", u.Host)
if err != nil {
log.Fatal(err)
}
return httpSrv.Serve(l)
}
httpRunner.OnStop = func() {
_ = httpSrv.Close()
}
go s.mr.Run(httpRunner)
<-s.closeCh
close(s.closeCh)
return nil
}
func (s *Server) Stop() {
s.mr.Stop()
return
}
|
