feat: replace text/template with templ and refactor code

handlers/proxy.go

@@ -0,0 +1,58 @@
+package handlers
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/gorilla/mux"
+	"github.com/rramiachraf/dumb/views"
+	"github.com/sirupsen/logrus"
+)
+
+func isValidExt(ext string) bool {
+	valid := []string{"jpg", "jpeg", "png", "gif"}
+	for _, c := range valid {
+		if strings.ToLower(ext) == c {
+			return true
+		}
+	}
+
+	return false
+}
+
+func ImageProxy(l *logrus.Logger) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		v := mux.Vars(r)
+		f := v["filename"]
+		ext := v["ext"]
+
+		if !isValidExt(ext) {
+			w.WriteHeader(http.StatusBadRequest)
+			views.ErrorPage(400, "something went wrong").Render(context.Background(), w)
+			return
+		}
+
+		// first segment of URL resize the image to reduce bandwith usage.
+		url := fmt.Sprintf("https://t2.genius.com/unsafe/300x300/https://images.genius.com/%s.%s", f, ext)
+
+		res, err := sendRequest(url)
+		if err != nil {
+			l.Errorln(err)
+			w.WriteHeader(http.StatusInternalServerError)
+			views.ErrorPage(500, "cannot reach Genius servers").Render(context.Background(), w)
+			return
+		}
+
+		if res.StatusCode != http.StatusOK {
+			w.WriteHeader(http.StatusInternalServerError)
+			views.ErrorPage(500, "something went wrong").Render(context.Background(), w)
+			return
+		}
+
+		w.Header().Add("Content-type", fmt.Sprintf("image/%s", ext))
+		io.Copy(w, res.Body)
+	}
+}