113 lines
2.9 KiB
Go
113 lines
2.9 KiB
Go
package main
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import (
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"context"
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"errors"
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"fmt"
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"html"
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"io"
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"io/fs"
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"log"
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"net"
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"net/http"
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"os"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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)
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func sendThatFile(basepath string) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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filename := filepath.Join(basepath, filepath.Clean(string([]rune{filepath.Separator})+filepath.FromSlash(r.URL.Path)))
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f, err := os.Open(filename)
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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http.NotFound(w, r)
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return
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}
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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defer f.Close()
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finfo, err := f.Stat()
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if err != nil {
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http.Error(w, fmt.Sprintf("checking file info: %v", err), http.StatusInternalServerError)
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return
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}
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content := io.ReadSeeker(f)
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if finfo.IsDir() {
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names, err := f.ReadDir(-1)
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if err != nil {
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http.Error(w, fmt.Sprintf("reading directory: %v", err), http.StatusInternalServerError)
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}
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var builder strings.Builder
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builder.WriteString("<body><html>")
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for _, name := range names {
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suffix := ""
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if name.IsDir() {
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suffix = "/"
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}
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builder.WriteString(fmt.Sprintf("<a href=%q>%s</a><br/>\n", path.Join(r.URL.Path, name.Name())+suffix, html.EscapeString(fs.FormatDirEntry(name))))
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}
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builder.WriteString("</html></body>")
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content = strings.NewReader(builder.String())
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}
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http.ServeContent(w, r, filename, finfo.ModTime(), content)
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}
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}
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func main() {
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args := os.Args
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if len(args) < 2 {
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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]]]]")
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}
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basedir := args[1]
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port := "0"
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if len(args) > 2 {
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port = args[2]
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}
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certs, key := "", ""
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if len(args) > 5 && args[4] != "" && args[5] != "" {
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certs = args[4]
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key = args[5]
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}
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if len(args) > 6 && args[6] != "" {
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err := os.WriteFile(args[6], []byte(strconv.Itoa(os.Getpid())), 0o644)
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if err != nil {
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log.Fatalf("%v", err)
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}
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}
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http.HandleFunc("/", sendThatFile(basedir))
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server := http.Server{
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Addr: ":" + port,
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BaseContext: func(l net.Listener) context.Context {
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if tcp, ok := l.Addr().(*net.TCPAddr); ok {
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if len(args) > 3 {
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f, err := os.CreateTemp(filepath.Dir(args[3]), filepath.Base(args[3]))
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if err != nil {
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log.Fatalf("%v", err)
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}
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tempName := f.Name()
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port := strconv.Itoa(tcp.Port)
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if n, err := f.WriteString(port); err != nil || n != len(port) {
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if err != nil {
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log.Fatalf("%v", err)
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}
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log.Fatalf("short write: %d != %d", n, len(port))
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}
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f.Close()
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if err := os.Rename(tempName, args[3]); err != nil {
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log.Fatalf("rename: %v", err)
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}
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}
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}
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return context.Background()
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},
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}
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if certs != "" && key != "" {
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log.Fatal(server.ListenAndServeTLS(certs, key))
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}
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log.Fatal(server.ListenAndServe())
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}
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