Errors in image format (closes #165)

main.go

@@ -52,14 +52,7 @@ func main() {
 				code = e.Code
 			}
 
-			err = ctx.Status(code).Render("errors/error", fiber.Map{
+			return utils.RenderError(ctx, code)
-				"err": err,
-			})
-			if err != nil {
-				return ctx.Status(fiber.StatusInternalServerError).SendString("Internal Server Error")
-			}
-
-			return nil
 		},
 	})
 
@@ -77,14 +70,23 @@ func main() {
 		app.Get("/errors/429", func(c *fiber.Ctx) error {
 			return c.Render("errors/429", nil)
 		})
+		app.Get("/errors/429/img", func(c *fiber.Ctx) error {
+			return c.Redirect("/static/img/error-429.png")
+		})
 		app.Get("/errors/404", func(c *fiber.Ctx) error {
 			return c.Render("errors/404", nil)
 		})
+		app.Get("/errors/404/img", func(c *fiber.Ctx) error {
+			return c.Redirect("/static/img/error-404.png")
+		})
 		app.Get("/errors/error", func(c *fiber.Ctx) error {
 			return c.Render("errors/error", fiber.Map{
 				"err": "Test error",
 			})
 		})
+		app.Get("/errors/error/img", func(c *fiber.Ctx) error {
+			return c.Redirect("/static/img/error-generic.png")
+		})
 	} else {
 		app.Use("/static", filesystem.New(filesystem.Config{
 			MaxAge: 2592000,

pages/embed.go

@@ -23,10 +23,10 @@ func HandleEmbed(c *fiber.Ctx) error {
 		post, err = ApiClient.FetchMedia(c.Params("postID"))
 	}
 	if err != nil && err.Error() == "ratelimited by imgur" {
-		return c.Status(429).Render("errors/429", nil)
+		return utils.RenderError(c, 429)
 	}
 	if err != nil && post.Id == "" && strings.Contains(err.Error(), "404") {
-		return c.Status(404).Render("errors/404", nil)
+		return utils.RenderError(c, 404)
 	}
  	if err != nil {
 		return err

pages/media.go

@@ -11,6 +11,7 @@ import (
 
 func HandleMedia(c *fiber.Ctx) error {
 	c.Set("Cache-Control", "public,max-age=31557600")
+	c.Set("Content-Security-Policy", "default-src 'none'; style-src 'self'; img-src 'self'")
 	if strings.HasPrefix(c.Path(), "/stack") {
 		return handleMedia(c, "https://i.stack.imgur.com/"+strings.ReplaceAll(c.Params("baseName"), "stack/", "")+"."+c.Params("extension"))
 	} else {
@@ -20,13 +21,15 @@ func HandleMedia(c *fiber.Ctx) error {
 
 func HandleUserCover(c *fiber.Ctx) error {
 	c.Set("Cache-Control", "public,max-age=604800")
+	c.Set("Content-Security-Policy", "default-src 'none'")
 	return handleMedia(c, "https://imgur.com/user/"+c.Params("userID")+"/cover?maxwidth=2560")
-};
+}
 
 func HandleUserAvatar(c *fiber.Ctx) error {
 	c.Set("Cache-Control", "public,max-age=604800")
+	c.Set("Content-Security-Policy", "default-src 'none'")
 	return handleMedia(c, "https://imgur.com/user/"+c.Params("userID")+"/avatar")
-};
+}
 
 func handleMedia(c *fiber.Ctx, url string) error {
 	utils.SetHeaders(c)
@@ -57,19 +60,14 @@ func handleMedia(c *fiber.Ctx, url string) error {
 		return err
 	}
 
-	c.Status(res.StatusCode)
+	if res.StatusCode == 404 || strings.Contains(res.Request.URL.String(), "error/404") {
-	if res.StatusCode == 404 {
+		return utils.RenderError(c, 404)
-		return c.Render("errors/404", fiber.Map{
-			"path": c.Path(),
-		})
 	} else if res.StatusCode == 429 {
-		return c.Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 
 	c.Set("Accept-Ranges", "bytes")
-	c.Set("Content-Type", res.Header.Get("Content-Type"));
+	c.Set("Content-Type", res.Header.Get("Content-Type"))
 	c.Set("Content-Length", res.Header.Get("Content-Length"))
 	if res.Header.Get("Content-Range") != "" {
 		c.Set("Content-Range", res.Header.Get("Content-Range"))

pages/post.go

@@ -26,12 +26,10 @@ func HandlePost(c *fiber.Ctx) error {
 		post, err = ApiClient.FetchMedia(c.Params("postID"))
 	}
 	if err != nil && err.Error() == "ratelimited by imgur" {
-		return c.Status(429).Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 	if err != nil && post.Id == "" && strings.Contains(err.Error(), "404") {
-		return c.Status(404).Render("errors/404", nil)
+		return utils.RenderError(c, 404)
 	}
 	if err != nil {
 		return err

pages/privacy.go

@@ -9,6 +9,7 @@ import (
 func HandlePrivacy(c *fiber.Ctx) error {
 	utils.SetHeaders(c)
 	c.Set("X-Frame-Options", "DENY")
+	c.Set("Content-Security-Policy", "default-src 'none'; form-action 'self'; style-src 'self'; img-src 'self'; manifest-src 'self'; block-all-mixed-content")
 
 	return c.Render("privacy", fiber.Map{
 		"config":  utils.Config,

pages/tag.go

@@ -25,15 +25,13 @@ func HandleTag(c *fiber.Ctx) error {
 
 	tag, err := ApiClient.FetchTag(c.Params("tag"), c.Query("sort"), page)
 	if err != nil && err.Error() == "ratelimited by imgur" {
-		return c.Status(429).Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 	if err != nil {
 		return err
 	}
 	if tag.Display == "" {
-		return c.Status(404).Render("errors/404", nil)
+		return utils.RenderError(c, 404)
 	}
 
 	return c.Render("tag", fiber.Map{

pages/user.go

@@ -25,23 +25,19 @@ func HandleUser(c *fiber.Ctx) error {
 
 	user, err := ApiClient.FetchUser(c.Params("userID"))
 	if err != nil && err.Error() == "ratelimited by imgur" {
-		return c.Status(429).Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 	if err != nil {
 		return err
 	}
 	if user.Username == "" {
-		return c.Status(404).Render("errors/404", nil)
+		return utils.RenderError(c, 404)
 	}
 
 	submissions, err := ApiClient.FetchSubmissions(c.Params("userID"), "newest", page)
 	if err != nil && err.Error() == "ratelimited by imgur" {
 		c.Status(429)
-		return c.Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 	if err != nil {
 		return err
@@ -64,23 +60,19 @@ func HandleUserComments(c *fiber.Ctx) error {
 
 	user, err := ApiClient.FetchUser(c.Params("userID"))
 	if err != nil && err.Error() == "ratelimited by imgur" {
-		return c.Status(429).Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 	if err != nil {
 		return err
 	}
 	if user.Username == "" {
-		return c.Status(404).Render("errors/404", nil)
+		return utils.RenderError(c, 404)
 	}
 
 	comments, err := ApiClient.FetchUserComments(c.Params("userID"))
 	if err != nil && err.Error() == "ratelimited by imgur" {
 		c.Status(429)
-		return c.Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 	if err != nil {
 		return err
@@ -110,23 +102,18 @@ func HandleUserFavorites(c *fiber.Ctx) error {
 
 	user, err := ApiClient.FetchUser(c.Params("userID"))
 	if err != nil && err.Error() == "ratelimited by imgur" {
-		return c.Status(429).Render("errors/429", fiber.Map{
+		return utils.RenderError(c, 429)
-			"path": c.Path(),
-		})
 	}
 	if err != nil {
 		return err
 	}
 	if user.Username == "" {
-		return c.Status(404).Render("errors/404", nil)
+		return utils.RenderError(c, 404)
 	}
 
 	favorites, err := ApiClient.FetchUserFavorites(c.Params("userID"), "newest", page)
 	if err != nil && err.Error() == "ratelimited by imgur" {
-		c.Status(429)
+		return utils.RenderError(c, 429)
-		return c.Render("errors/429", fiber.Map{
-			"path": c.Path(),
-		})
 	}
 	if err != nil {
 		return err

utils/error.go

@@ -0,0 +1,25 @@
+package utils
+
+import (
+	"strconv"
+	"strings"
+
+	"codeberg.org/rimgo/rimgo/static"
+	"github.com/gofiber/fiber/v2"
+)
+
+func RenderError(c *fiber.Ctx, code int) error {
+	if !strings.Contains(c.Get("Accept"), "html") {
+		codeStr := "generic"
+		if code != 0 {
+			codeStr = strconv.Itoa(code)
+		}
+		img, _ := static.GetFiles().ReadFile("img/error-" + codeStr + ".png")
+		c.Set("Content-Type", "image/png")
+		return c.Status(code).Send(img)
+	} else {
+		return c.Status(code).Render("errors/" + strconv.Itoa(code), fiber.Map{
+			"path": c.Path(),
+		})
+	}
+}