2022-09-08 15:12:06 +00:00
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/*
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Copyright © 2022 Seednode <seednode@seedno.de>
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*/
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package cmd
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import (
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2022-09-08 20:57:52 +00:00
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"errors"
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2022-09-08 15:12:06 +00:00
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"fmt"
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"io"
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"log"
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"net/http"
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"net/url"
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"os"
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"strconv"
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"strings"
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)
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func generatePageHtml(w http.ResponseWriter, paths []string) error {
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fileList, err := getFileList(paths)
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if err != nil {
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return err
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}
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fileName, filePath := pickFile(fileList)
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w.Header().Add("Content-Type", "text/html")
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htmlBody := `<html lang="en">
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<head>
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<style>img{max-width:100%;max-height:97vh;height:auto;}</style>
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<title>`
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htmlBody += fileName
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htmlBody += `</title>
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</head>
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<body>
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<a href="/"><img src="`
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htmlBody += filePath
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htmlBody += `"></img></a>
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`
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_, err = io.WriteString(w, htmlBody)
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if err != nil {
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return err
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}
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return nil
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}
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func statusNotFound(w http.ResponseWriter, filePath string) error {
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fmt.Println("Client requested non-existent file " + filePath + ".")
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w.WriteHeader(http.StatusNotFound)
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w.Header().Set("Content-Type", "txt/plain")
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htmlBody := "File not found."
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_, err := io.WriteString(w, htmlBody)
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if err != nil {
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return err
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}
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return nil
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}
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func statusForbidden(w http.ResponseWriter, filePath string) error {
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fmt.Println("Client requested forbidden file " + filePath + ".")
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w.WriteHeader(http.StatusForbidden)
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w.Header().Set("Content-Type", "txt/plain")
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htmlBody := "Access denied."
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_, err := io.WriteString(w, htmlBody)
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if err != nil {
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return err
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}
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return nil
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}
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func serveStaticFile(w http.ResponseWriter, request string, paths []string) error {
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filePath, err := url.QueryUnescape(request)
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if err != nil {
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return err
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}
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var matchesPrefix = false
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for i := 0; i < len(paths); i++ {
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if strings.HasPrefix(filePath, paths[i]) {
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matchesPrefix = true
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}
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}
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if matchesPrefix == false {
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err := statusNotFound(w, filePath)
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if err != nil {
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return err
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}
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return nil
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}
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_, err = os.Stat(filePath)
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if errors.Is(err, os.ErrNotExist) {
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err := statusNotFound(w, filePath)
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if err != nil {
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return err
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}
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return nil
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} else if !errors.Is(err, os.ErrNotExist) && err != nil {
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return err
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}
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buf, err := os.ReadFile(filePath)
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if err != nil {
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return err
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}
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w.Write(buf)
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return nil
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}
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func servePageHandler(paths []string) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if r.RequestURI == "/" {
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err := generatePageHtml(w, paths)
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if err != nil {
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log.Fatal(err)
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}
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} else {
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err := serveStaticFile(w, r.RequestURI, paths)
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if err != nil {
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log.Fatal(err)
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}
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}
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}
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}
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func doNothing(http.ResponseWriter, *http.Request) {}
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func ServePage(args []string) {
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defer HandleExit()
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paths := normalizePaths(args)
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http.HandleFunc("/", servePageHandler(paths))
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http.HandleFunc("/favicon.ico", doNothing)
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port := strconv.Itoa(Port)
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log.Fatal(http.ListenAndServe(":"+port, nil))
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}
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