forked from WEB-IMB-WS2526/lab-development-imb
07: Lösungen
parent
8284e554da
commit
b392786fe4
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@ -0,0 +1,48 @@
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package main
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import (
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"encoding/json"
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"os"
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)
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type Book struct {
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ID int `json:"id"`
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Title string `json:"title"`
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Author string `json:"author"`
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Read bool `json:"read"`
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}
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type Library struct {
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Books []Book `json:"books"`
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}
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func (lib *Library) Add(title, author string) {
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id := len(lib.Books) + 1
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lib.Books = append(lib.Books, Book{ID: id, Title: title, Author: author, Read: false})
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}
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func (lib *Library) MarkRead(id int) {
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for i := range lib.Books {
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if lib.Books[i].ID == id {
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lib.Books[i].Read = true
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}
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}
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}
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func (lib *Library) Save(filename string) error {
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data, err := json.MarshalIndent(lib, "", " ")
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if err != nil {
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return err
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}
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return os.WriteFile(filename, data, 0644)
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}
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func LoadLibrary(filename string) (*Library, error) {
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data, err := os.ReadFile(filename)
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if err != nil {
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return &Library{}, nil
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}
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var lib Library
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err = json.Unmarshal(data, &lib)
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return &lib, err
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}
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@ -0,0 +1,16 @@
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{
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"books": [
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{
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"id": 1,
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"title": "Der Steppenwolf",
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"author": "Hermann Hesse",
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"read": false
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},
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{
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"id": 2,
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"title": "Clean Code",
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"author": "Robert C. Martin",
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"read": true
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}
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]
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}
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@ -0,0 +1,50 @@
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package main
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import (
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"fmt"
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"os"
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"strconv"
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)
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func main() {
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if len(os.Args) < 2 {
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fmt.Println("Usage: add <title> <author> | list | read <id>")
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return
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}
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lib, _ := LoadLibrary("books.json")
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switch os.Args[1] {
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case "add":
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if len(os.Args) < 4 {
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fmt.Println("Usage: add <title> <author>")
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return
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}
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lib.Add(os.Args[2], os.Args[3])
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lib.Save("books.json")
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fmt.Println("Buch hinzugefügt.")
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case "list":
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for _, b := range lib.Books {
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status := " "
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if b.Read {
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status = "✓"
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}
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fmt.Printf("[%s] %d: \"%s\" by %s\n", status, b.ID, b.Title, b.Author)
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}
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case "read":
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if len(os.Args) < 3 {
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fmt.Println("Geben Sie eine Buch-ID ein.")
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return
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}
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id, err := strconv.Atoi(os.Args[2])
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if err != nil {
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fmt.Println("Ungültige ID-Eingabe.")
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return
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}
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lib.MarkRead(id)
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lib.Save("books.json")
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fmt.Println("Buch als gelesen markiert.")
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}
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}
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@ -0,0 +1,92 @@
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package main
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import (
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"errors"
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"fmt"
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"log"
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"net/http"
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)
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type workshopHandler int
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func parseCheckboxValue(value string) string {
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if value == "" || (value != "ja" && value != "on") {
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return "nein"
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}
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return "ja"
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}
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func parseRadiobuttonValue(value string) (string, error) {
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if value == "" || (value != "praesenz" && value != "online") {
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return "", errors.New("Auswahl nicht erlaubt.")
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}
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return value, nil
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}
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func (worksh workshopHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "Nur POST-Anfragen erlaubt", http.StatusMethodNotAllowed)
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return
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}
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// Formulardaten parsen und Überprüfen, ob ungültige Formulardaten gesendet wurde
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if err := r.ParseForm(); err != nil {
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http.Error(w, "Fehler beim Parsen des Formulars", http.StatusBadRequest)
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return
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}
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// Überprüfen, ob leeres Formular gesendet wurde
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if len(r.PostForm) == 0 {
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http.Error(w, "Kein Formular gesendet", http.StatusBadRequest)
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return
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}
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// Formulardaten auslesen und ggf. überprüfen
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vorname := r.PostForm.Get("vorname")
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if vorname == "" {
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http.Error(w, "Pflichtfeld fehlt.", http.StatusBadRequest)
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return
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}
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nachname := r.PostForm.Get("nachname")
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if nachname == "" {
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http.Error(w, "Pflichtfeld fehlt.", http.StatusBadRequest)
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return
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}
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email := r.PostForm.Get("email")
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telefon := r.PostForm.Get("telefon")
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sessions := r.PostForm["sessions"]
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agb := parseCheckboxValue(r.PostForm.Get("agb"))
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if agb == "nein" {
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http.Error(w, "AGB wurde nicht akzeptiert.", http.StatusBadRequest)
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return
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}
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newsletter := parseCheckboxValue(r.PostForm.Get("newsletter"))
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equipment := parseCheckboxValue(r.PostForm.Get("equipment"))
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format, err := parseRadiobuttonValue(r.PostForm.Get("format"))
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if err != nil {
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http.Error(w, "Ungültige Auswahl des Formats.", http.StatusBadRequest)
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return
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}
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// Ausgabe im Terminal
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fmt.Fprintf(w, "Neue Registrierung erhalten:\n")
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fmt.Fprintf(w, "Vorname: %s\n", vorname)
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fmt.Fprintf(w, "Nachname: %s\n", nachname)
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fmt.Fprintf(w, "E-Mail: %s\n", email)
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fmt.Fprintf(w, "Telefon: %s\n", telefon)
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fmt.Fprintf(w, "Bevorzugte Sessions: \n")
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for _, session := range sessions {
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fmt.Fprintf(w, " - %s\n", session)
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}
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fmt.Fprintf(w, "AGB: %s\n", agb)
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fmt.Fprintf(w, "Newsletter: %s\n", newsletter)
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fmt.Fprintf(w, "Equipment benötigt: %s\n", equipment)
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fmt.Fprintf(w, "Teilnahmeformat: %s", format)
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}
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func main() {
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var workshop workshopHandler
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fmt.Println("Server läuft auf localhost:8080...")
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log.Fatal(http.ListenAndServe(":8080", workshop))
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}
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@ -0,0 +1,66 @@
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<!DOCTYPE html>
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<html lang="de">
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<head>
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<meta charset="utf-8">
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<title>Workshop-Anmeldung</title>
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</head>
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<body>
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<form action="http://localhost:8080/registrierung" method="post">
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<fieldset>
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<legend>Persönliche Angaben:</legend>
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<label for="vorname">Vorname:</label><br>
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<input type="text" name="vorname" id="vorname" placeholder="Vorname" required><br>
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<label for="nachname">Nachname:</label><br>
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<input type="text" name="nachname" id="nachname" placeholder="Nachname" required><br>
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<label for="email">E-Mail:</label><br>
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<input type="email" name="email" id="email" autocomplete="email"><br>
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<label for="telefon">Handynummer:</label><br>
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<input type="tel" name="telefon" id="telefon" pattern="^01[5-7][0-9]{7,10}$"><br><br>
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</fieldset>
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<fieldset>
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<legend>Kursauswahl:</legend>
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<label for="kurs">Kurs:</label><br>
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<input type="text" name="kurs" id="kurs" value="Webentwicklung Basics" readonly disabled><br><br>
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<label for="sessions">Bevorzugte Session:</label><br>
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<select id="sessions" name="sessions" multiple size="4">
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<option value="vormittag">Vormittag</option>
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<option value="nachmittag">Nachmittag</option>
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<option value="abendsession">Abend</option>
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<option value="wochenende">Wochenende</option>
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</select><br>
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</fieldset>
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<fieldset>
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<legend>Zusätzliche Optionen:</legend>
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<input type="checkbox" id="agb" name="agb" required>
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<label for="agb">Ich akzeptiere die Teilnahmebedingungen.</label><br>
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<input type="checkbox" id="newsletter" name="newsletter" value="ja">
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<label for="newsletter">Newsletter abonnieren.</label><br>
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<input type="checkbox" id="equipment" name="equipment" value="ja">
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<label for="equipment">Ich benötige spezielles Equipment.</label><br>
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</fieldset>
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<fieldset>
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<legend>Teilnahmeformat:</legend>
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Format wählen:<br>
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<input type="radio" id="online" name="format" value="online" required>
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<label for="online">Online</label><br>
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<input type="radio" id="praesenz" name="format" value="praesenz">
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<label for="praesenz">Präsenz</label><br>
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</fieldset>
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<br>
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<input type="submit" value="Jetzt anmelden">
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</form>
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</body>
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</html>
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@ -0,0 +1,119 @@
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{
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"openapi": "3.0.0",
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"info": {
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"title": "Workshop API",
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"version": "1.0.0"
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},
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"servers": [
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{
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"url": "http://localhost:8080"
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}
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],
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"paths": {
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"/registrierung": {
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"post": {
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"summary": "Sends all information needed for registering at a workshop",
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"requestBody": {
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"required": false,
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"content": {
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"application/x-www-form-urlencoded": {
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"schema": {
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"$ref": "#/components/schemas/RegistrierungForm"
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}
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},
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"application/json": {
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"schema": {
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"$ref": "#/components/schemas/RegistrierungForm"
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}
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}
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}
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},
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"responses": {
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"200": {
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"description": "Success",
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"content": {
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"text/html": {
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"schema": {
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"type": "string"
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}
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}
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}
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},
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"400": {
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"description": "Bad Request",
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"content": {
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"text/plain": {
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"schema": {
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"type": "string",
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"example": "Kein Formular gesendet"
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}
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}
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}
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}
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}
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}
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}
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},
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"components": {
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"schemas": {
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"RegistrierungForm": {
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"type": "object",
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"required": [
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"vorname",
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"nachname",
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"agb",
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"format"
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],
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"properties": {
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"vorname": {
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"type": "string",
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"example": "Zoya"
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},
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"nachname": {
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"type": "string",
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"example": "Akhtar"
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},
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"email": {
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"type": "string",
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"example": "z.akhtar@test.de"
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},
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"telefon": {
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"type": "string",
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"example": "Zoya"
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},
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"sessions": {
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"type": "array",
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"items": {
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"type": "string",
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"example": "vormittag"
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},
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"example": [
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"vormittag",
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"nachmittag"
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]
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},
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"agb": {
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"type": "string",
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"enum": ["on","ja"],
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"example": "on"
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},
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"newsletter": {
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"type": "string",
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"enum": ["on","ja"],
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"example": "ja"
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},
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"equipment": {
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"type": "string",
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"enum": ["on","ja"],
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"example": "ja"
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},
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"format": {
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"type": "string",
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"enum": ["online","praesenz"],
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"example": "online"
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}
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}
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}
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}
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}
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}
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