1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
package main
import (
"context"
"errors"
"fmt"
"html"
"io"
"io/fs"
"log"
"net"
"net/http"
"os"
"path"
"path/filepath"
"strconv"
"strings"
)
func sendThatFile(basepath string) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
filename := filepath.Join(basepath, filepath.Clean(string([]rune{filepath.Separator})+filepath.FromSlash(r.URL.Path)))
f, err := os.Open(filename)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
http.NotFound(w, r)
return
}
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer f.Close()
finfo, err := f.Stat()
if err != nil {
http.Error(w, fmt.Sprintf("checking file info: %v", err), http.StatusInternalServerError)
return
}
content := io.ReadSeeker(f)
if finfo.IsDir() {
names, err := f.ReadDir(-1)
if err != nil {
http.Error(w, fmt.Sprintf("reading directory: %v", err), http.StatusInternalServerError)
}
var builder strings.Builder
builder.WriteString("<body><html>")
for _, name := range names {
suffix := ""
if name.IsDir() {
suffix = "/"
}
builder.WriteString(fmt.Sprintf("<a href=%q>%s</a><br/>\n", path.Join(r.URL.Path, name.Name())+suffix, html.EscapeString(fs.FormatDirEntry(name))))
}
builder.WriteString("</html></body>")
content = strings.NewReader(builder.String())
}
http.ServeContent(w, r, filename, finfo.ModTime(), content)
}
}
func main() {
args := os.Args
if len(args) < 2 {
log.Fatal("requires subdirectory path [and optional port [and optional port file name [and optional TLS cert and key file names [and optional pid file name]]]]")
}
basedir := args[1]
port := "0"
if len(args) > 2 {
port = args[2]
}
certs, key := "", ""
if len(args) > 5 && args[4] != "" && args[5] != "" {
certs = args[4]
key = args[5]
}
if len(args) > 6 && args[6] != "" {
err := os.WriteFile(args[6], []byte(strconv.Itoa(os.Getpid())), 0o644)
if err != nil {
log.Fatalf("%v", err)
}
}
http.HandleFunc("/", sendThatFile(basedir))
server := http.Server{
Addr: ":" + port,
BaseContext: func(l net.Listener) context.Context {
if tcp, ok := l.Addr().(*net.TCPAddr); ok {
if len(args) > 3 {
f, err := os.CreateTemp(filepath.Dir(args[3]), filepath.Base(args[3]))
if err != nil {
log.Fatalf("%v", err)
}
tempName := f.Name()
port := strconv.Itoa(tcp.Port)
if n, err := f.WriteString(port); err != nil || n != len(port) {
if err != nil {
log.Fatalf("%v", err)
}
log.Fatalf("short write: %d != %d", n, len(port))
}
f.Close()
if err := os.Rename(tempName, args[3]); err != nil {
log.Fatalf("rename: %v", err)
}
}
}
return context.Background()
},
}
if certs != "" && key != "" {
log.Fatal(server.ListenAndServeTLS(certs, key))
}
log.Fatal(server.ListenAndServe())
}
|
