guestbook: fix for when referer contains path

Signed-off-by: x-t <xdasht@pm.me>

apps/guestbook3/src/controllers/post/post.go

@@ -9,19 +9,28 @@
 package post
 
 import (
-	goaway "github.com/TwiN/go-away"
-	"github.com/gin-gonic/gin"
+	"fmt"
 	"log"
 	"net/http"
 	"time"
 	"x-t/guestbook3/src/models"
 	"x-t/guestbook3/src/providers"
 	"x-t/guestbook3/src/settings"
+
+	goaway "github.com/TwiN/go-away"
+	"github.com/gin-gonic/gin"
 )
 
 func Post(c *gin.Context) {
 	postRequest := &models.PostRequest{}
-	referer := c.Request.Referer() + settings.RedirectHTML
+
+	baseReferer, err := providers.RemovePathSegments(c.Request.Referer())
+	if err != nil {
+		fmt.Println("Error:", err)
+		panic(err)
+	}
+
+	referer := baseReferer + settings.RedirectHTML
 
 	if err := c.Bind(postRequest); err != nil {
 		c.HTML(http.StatusBadRequest,

apps/guestbook3/src/providers/uri.go

@@ -0,0 +1,25 @@
+// x-t.github.io (c) 2023
+// This work is licensed under the Creative Commons
+// Attribution-NonCommercial-ShareAlike 4.0 International
+// License. To view a copy of this license, visit
+// http://creativecommons.org/licenses/by-nc-sa/4.0/ or
+// send a letter to Creative Commons, PO Box 1866,
+// Mountain View, CA 94042, USA.
+
+package providers
+
+import (
+	"net/url"
+	"fmt"
+)
+
+func RemovePathSegments(uri string) (string, error) {
+	u, err := url.Parse(uri)
+	if err != nil {
+		return "", err
+	}
+
+	baseURI := fmt.Sprintf("%s://%s", u.Scheme, u.Host)
+
+	return baseURI, nil
+}

apps/guestbook3/src/settings/constants.go

@@ -11,12 +11,4 @@ package settings
 // RedirectHTML Name of HTML document (endpoint) where
 // the post controller (/api/post) will redirect/point to
 // in a concat of Headers[Referer] + RedirectHTML.
-//
-// See:
-//
-// - src/controllers/post/post.go#54
-//
-// - src/controllers/post/post.go#59
-//
-// - src/views/post/validation_errors.html.tmpl#9
 const RedirectHTML = "guestbook.html"