Support files with spaces

Lean on net/url/URL to properly format filenames when a single file is
being hosted.

3 files changed, 28 insertions, 9 deletions

diff --git a/go.mod b/go.mod
index 0de3a6d..bbc50f0 100644
--- a/go.mod
+++ b/go.mod
@@ -4,4 +4,10 @@ go 1.17
 
 require github.com/mdp/qrterminal/v3 v3.0.0
 
-require rsc.io/qr v0.2.0 // indirect
+require (
+	github.com/yuin/goldmark v1.4.13 // indirect
+	golang.org/x/mod v0.12.0 // indirect
+	golang.org/x/sys v0.12.0 // indirect
+	golang.org/x/tools v0.13.0 // indirect
+	rsc.io/qr v0.2.0 // indirect
+)
diff --git a/go.sum b/go.sum
index e5a936f..4f99edd 100644
--- a/go.sum
+++ b/go.sum
@@ -4,6 +4,14 @@ github.com/mdp/qrterminal v1.0.1 h1:07+fzVDlPuBlXS8tB0ktTAyf+Lp1j2+2zK3fBOL5b7c=
 github.com/mdp/qrterminal v1.0.1/go.mod h1:Z33WhxQe9B6CdW37HaVqcRKzP+kByF3q/qLxOGe12xQ=
 github.com/mdp/qrterminal/v3 v3.0.0 h1:ywQqLRBXWTktytQNDKFjhAvoGkLVN3J2tAFZ0kMd9xQ=
 github.com/mdp/qrterminal/v3 v3.0.0/go.mod h1:NJpfAs7OAm77Dy8EkWrtE4aq+cE6McoLXlBqXQEwvE0=
+github.com/yuin/goldmark v1.4.13 h1:fVcFKWvrslecOb/tg+Cc05dkeYx540o0FuFt3nUVDoE=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
+golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/tools v0.13.0 h1:Iey4qkscZuv0VvIt8E0neZjtPVQFSc870HQ448QgEmQ=
+golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
 rsc.io/qr v0.2.0 h1:6vBLea5/NRMVTz8V66gipeLycZMl/+UlFmk8DvqQ6WY=
 rsc.io/qr v0.2.0/go.mod h1:IF+uZjkb9fqyeF/4tlBoynqmQxUoPfWEKh921coOuXs=
diff --git a/send_over_http.go b/send_over_http.go
index c34145b..98b7e6e 100644
--- a/send_over_http.go
+++ b/send_over_http.go
@@ -6,10 +6,15 @@ import (
 	"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 {
@@ -76,20 +81,20 @@ func (s *Server) Start() error {
 		return err
 	}
 
-	prot := "http"
-	port := "8081"
-
-	url := fmt.Sprintf("%s://%s:%s", prot, ip, port)
+	u := url.URL{
+		Scheme: "http",
+		Host:   fmt.Sprintf("%s:%d", ip, port),
+	}
 	if stat, _ := os.Stat(s.filepath); !stat.IsDir() {
-		url += "/" + filepath.Base(s.filepath)
+		u.Path = filepath.Base(s.filepath)
 	}
 
-	qrCodeShower := NewTerminalQRShower(url)
+	qrCodeShower := NewTerminalQRShower(u.String())
 	go s.mr.Run(qrCodeShower)
 
 	httpRunner := NewRunner()
 	httpSrv := &http.Server{
-		Addr: ":" + port,
+		Addr: ":" + strconv.Itoa(port),
 	}
 
 	var d http.FileSystem = http.Dir(s.filepath)
@@ -100,7 +105,7 @@ func (s *Server) Start() error {
 	httpSrv.Handler = http.FileServer(d)
 
 	httpRunner.OnStart = func() error {
-		l, err := net.Listen("tcp4", ip.String()+":"+port)
+		l, err := net.Listen("tcp4", u.Host)
 		if err != nil {
 			log.Fatal(err)
 		}