261 lines
5.6 KiB
Go
Executable File
261 lines
5.6 KiB
Go
Executable File
/*
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Serve is a very simple static file server in go
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Usage:
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-p="8100": port to serve on
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-d=".": the directory of static files to host
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Navigating to http://localhost:8100 will display the index.html or directory
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listing file.
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*/
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package main
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"local/args"
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"local/gziphttp"
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"log"
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"net/http"
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"net/http/httptest"
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"os"
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"path"
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"regexp"
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"strings"
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)
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const (
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ENDPOINT_UPLOAD = "__upload__"
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ENDPOINT_DELETE = "__delete__"
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)
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var (
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fs *args.ArgSet
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)
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func main() {
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fs = args.NewArgSet()
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fs.Append(args.STRING, "p", "port to serve", "8100")
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fs.Append(args.STRING, "d", "static path to serve", "./public")
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if err := fs.Parse(); err != nil {
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panic(err)
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}
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d := fs.Get("d").GetString()
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p := strings.TrimPrefix(fs.Get("p").GetString(), ":")
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http.Handle("/", http.HandlerFunc(handler(d)))
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log.Printf("Serving %s on HTTP port: %s\n", d, p)
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log.Fatal(http.ListenAndServe(":"+p, nil))
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}
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func handler(d string) http.HandlerFunc {
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return gzip(endpoints(withDel(fserve(d))))
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}
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func writeMeta(w http.ResponseWriter) {
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fmt.Fprintf(w, `
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<head>
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<meta charset="UTF-8"/>
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<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
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</head>
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`)
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}
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func writeForm(w http.ResponseWriter) {
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fmt.Fprintf(w, `
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<form enctype="multipart/form-data" action="./%s" method="post">
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<input type="file" name="file" required/>
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<input type="submit" value="upload"/>
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</form>
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`, ENDPOINT_UPLOAD)
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}
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func gzip(foo http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if gziphttp.Can(r) {
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gz := gziphttp.New(w)
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defer gz.Close()
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w = gz
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}
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foo(w, r)
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}
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}
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func endpoints(foo http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if isDir(r) {
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writeMeta(w)
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writeForm(w)
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}
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if isUploaded(r) {
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if err := upload(w, r); err != nil {
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fmt.Fprintln(w, err.Error())
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}
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} else if isDeleted(r) {
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if err := del(w, r); err != nil {
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fmt.Fprintln(w, err.Error())
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}
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} else {
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setContentTypeIfMedia(w, r)
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foo(w, r)
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}
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}
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}
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func isUploaded(r *http.Request) bool {
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return path.Base(r.URL.Path) == ENDPOINT_UPLOAD
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}
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func isDeleted(r *http.Request) bool {
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return path.Base(r.URL.Path) == ENDPOINT_DELETE
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}
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func isDir(r *http.Request) bool {
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d := toRealPath(r.URL.Path)
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fi, err := os.Stat(d)
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if err != nil {
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return false
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}
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if !fi.IsDir() {
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return false
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}
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if _, err := os.Stat(path.Join(d, "index.html")); err == nil {
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return false
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}
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return true
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}
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func withDel(foo http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if !isDir(r) {
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foo(w, r)
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return
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}
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fmt.Fprintln(w, `<a href=".."><input type="button" style="padding: .15em 4em .35em 4em" value=".."/></a>`+"\n")
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w2 := httptest.NewRecorder()
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foo(w2, r)
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b := bytes.Split(w2.Body.Bytes(), []byte("\n"))
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buff := bytes.NewBuffer(nil)
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for i := range b {
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if bytes.Contains(b[i], []byte("<a href=")) {
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re := regexp.MustCompile(`href="[^"]*"`)
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match := re.Find(b[i])
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if len(match) > 0 {
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match = bytes.Split(match, []byte(`href="`))[1]
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match = match[:len(match)-1]
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b[i] = []byte(fmt.Sprintf(`<a href="%s/%s"><input type="button" value="❌" style="padding: .40em 1em .10em 1em; margin-right: .5em" onclick='return confirm("Delete "+%q+"?");'></input></a> %s`, match, ENDPOINT_DELETE, match, b[i]))
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}
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}
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buff.Write(b[i])
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buff.Write([]byte("\n"))
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}
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io.Copy(w, buff)
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}
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}
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func fserve(d string) http.HandlerFunc {
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h := http.FileServer(http.Dir(d))
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return h.ServeHTTP
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}
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func upload(w http.ResponseWriter, r *http.Request) error {
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r.ParseMultipartForm(100 << 20)
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file, handler, err := r.FormFile("file")
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if err != nil {
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return err
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}
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defer file.Close()
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p := toRealPath(path.Join(path.Dir(r.URL.Path), handler.Filename))
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if fi, err := os.Stat(p); err == nil && !fi.IsDir() {
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return errors.New("already exists")
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}
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f, err := os.Create(p)
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if err != nil {
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return err
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}
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defer f.Close()
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if _, err := io.Copy(f, file); err != nil {
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return err
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}
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http.Redirect(w, r, path.Dir(r.URL.Path)+"/", http.StatusSeeOther)
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return nil
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}
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func del(w http.ResponseWriter, r *http.Request) error {
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p := toRealPath(path.Dir(r.URL.Path))
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_, err := os.Stat(p)
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if err != nil {
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return err
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}
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err = os.RemoveAll(p)
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if err != nil {
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return err
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}
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http.Redirect(w, r, path.Dir(path.Dir(r.URL.Path))+"/", http.StatusSeeOther)
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return nil
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}
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func toRealPath(p string) string {
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d := path.Join(fs.Get("d").GetString())
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return path.Join(d, p)
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}
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func setContentTypeIfMedia(w http.ResponseWriter, r *http.Request) {
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ext := strings.ToLower(path.Ext(r.URL.Path))
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if i := strings.LastIndex(ext, "."); i != -1 {
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ext = ext[i:]
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}
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k := "Content-Type"
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v := ""
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switch ext {
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case ".mp4":
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v = "video/mp4"
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case ".mkv":
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v = "video/x-matroska"
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case ".mp3":
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v = "audio/mpeg3"
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case ".epub", ".mobi":
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k = "Content-Disposition"
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v = "attachment"
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case ".jpg", ".jpeg":
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v = "image/jpeg"
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case ".gif":
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v = "image/gif"
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case ".png":
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v = "image/png"
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case ".ico":
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v = "image/x-icon"
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case ".svg":
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v = "image/svg+xml"
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case ".css":
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v = "text/css"
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case ".js":
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v = "text/javascript"
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case ".json":
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v = "application/json"
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case ".html", ".htm":
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v = "text/html"
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case ".pdf":
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w.Header().Set("Content-Disposition", fmt.Sprintf("inline; filename=%q", path.Base(r.URL.Path)))
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v = "application/pdf"
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case ".webm":
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v = "video/webm"
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case ".weba":
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v = "audio/webm"
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case ".webp":
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v = "image/webp"
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case ".zip":
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v = "application/zip"
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case ".7z":
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v = "application/x-7z-compressed"
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case ".tar":
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v = "application/x-tar"
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default:
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return
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}
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w.Header().Set(k, v)
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}
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