1 files changed, 122 insertions, 0 deletions
diff --git a/send_over_http.go b/send_over_http.go
new file mode 100644
index 0000000..c34145b
--- /dev/null
+++ b/send_over_http.go
@@ -0,0 +1,122 @@
+package sendoverhttp
+
+import (
+	"fmt"
+	"io/fs"
+	"log"
+	"net"
+	"net/http"
+	"os"
+	"path/filepath"
+)
+
+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
+	}
+
+	prot := "http"
+	port := "8081"
+
+	url := fmt.Sprintf("%s://%s:%s", prot, ip, port)
+	if stat, _ := os.Stat(s.filepath); !stat.IsDir() {
+		url += "/" + filepath.Base(s.filepath)
+	}
+
+	qrCodeShower := NewTerminalQRShower(url)
+	go s.mr.Run(qrCodeShower)
+
+	httpRunner := NewRunner()
+	httpSrv := &http.Server{
+		Addr: ":" + 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", ip.String()+":"+port)
+		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
+}