2023-10-26 14:13:04 +00:00
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package main
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import (
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2023-10-27 07:01:55 +00:00
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"encoding/json"
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"flag"
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"html/template"
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"io"
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2023-10-26 14:13:04 +00:00
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"log"
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"math/rand"
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"net/http"
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"os"
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"strconv"
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"time"
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"github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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2023-10-26 14:13:04 +00:00
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)
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2023-10-27 07:01:55 +00:00
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var images []string
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var logger = logrus.New()
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var port string
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func init() {
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// Log as JSON instead of the default ASCII formatter
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logger.SetFormatter(&logrus.JSONFormatter{})
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// Output to stdout (or any other output you prefer)
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logger.SetOutput(os.Stdout)
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// Set the log level (info, warning, error, etc.)
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logger.SetLevel(logrus.InfoLevel)
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}
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func main() {
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viper.SetConfigName("config") // name of config file (without extension)
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viper.SetConfigType("yaml") // REQUIRED if the config file does not have the extension in the name
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viper.AddConfigPath(".") // path to look for the config file in
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if err := viper.ReadInConfig(); err != nil {
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log.Fatalf("Error reading configuration file: %v", err)
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}
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port := viper.GetString("server.port")
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flag.Parse()
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if err := viper.ReadInConfig(); err != nil {
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log.Fatalf("Error reading configuration file: %v", err)
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}
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images = getImages()
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http.HandleFunc("/", homeHandler)
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http.HandleFunc("/api/id", idHandler)
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http.HandleFunc("/api/list", listHandler)
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http.HandleFunc("/api/random", randomHandler)
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http.HandleFunc("/api/", func(w http.ResponseWriter, r *http.Request) {
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http.Error(w, "Invalid API path", http.StatusNotFound)
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})
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log.Println("Server started at port", port)
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log.Fatal(http.ListenAndServe(":"+port, nil))
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}
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func getImages() []string {
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files, err := os.ReadDir("images/")
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if err != nil {
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logger.WithError(err).Fatal("Error reading images directory")
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}
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var images []string
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for _, file := range files {
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images = append(images, file.Name())
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logger.Info("Loaded image:", file.Name())
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}
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return images
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}
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func sanitizeInput(input string) string {
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return template.HTMLEscapeString(input)
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}
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func homeHandler(w http.ResponseWriter, r *http.Request) {
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io.WriteString(w, "<html><body><div style=\"display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); grid-gap: 10px;\">")
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for i := range images {
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io.WriteString(w, `<a href="/api/id?id=`+strconv.Itoa(i)+`">`)
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io.WriteString(w, `<img src="/api/id?id=`+strconv.Itoa(i)+`" style="width: 100%; height: auto;"/>`)
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io.WriteString(w, `</a>`)
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}
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io.WriteString(w, "</div></body></html>")
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}
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func idHandler(w http.ResponseWriter, r *http.Request) {
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id := sanitizeInput(r.URL.Query().Get("id"))
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if id == "" {
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http.Error(w, "Missing id", http.StatusBadRequest)
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return
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}
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i, err := strconv.Atoi(id)
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if err != nil || i < 0 || i >= len(images) {
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http.Error(w, "Invalid id", http.StatusBadRequest)
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return
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}
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http.ServeFile(w, r, "images/"+images[i])
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}
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func listHandler(w http.ResponseWriter, r *http.Request) {
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imageList := []map[string]string{}
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for i := range images {
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imageInfo := map[string]string{
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"id": strconv.Itoa(i),
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"url": "/api/id?id=" + strconv.Itoa(i),
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}
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imageList = append(imageList, imageInfo)
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}
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jsonData, err := json.Marshal(imageList)
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if err != nil {
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(jsonData)
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}
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func randomHandler(w http.ResponseWriter, r *http.Request) {
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rand.Seed(time.Now().UnixNano())
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i := rand.Intn(len(images))
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http.Redirect(w, r, "/api/id?id="+strconv.Itoa(i), http.StatusSeeOther)
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}
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