From c2ea40b24023e6ecdb8b3860479f7e2db298f76c Mon Sep 17 00:00:00 2001
From: DarthSim <darthsim@gmail.com>
Date: Tue, 7 Dec 2021 15:16:59 +0600
Subject: [PATCH] Detect deprecated basic URL format

---
 CHANGELOG.md                  | 1 +
 options/processing_options.go | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 343b1c7c..f6792267 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## [Unreleased]
 ### Change
 - Improved ICC profiles handling.
+- Proper error message when the deprecated basic URL format is used.
 
 ### Fix
 - (pro) Fix parsing metadata of extended sequential JPEGs.
diff --git a/options/processing_options.go b/options/processing_options.go
index db19d1c2..091598cb 100644
--- a/options/processing_options.go
+++ b/options/processing_options.go
@@ -942,6 +942,14 @@ func defaultProcessingOptions(headers http.Header) (*ProcessingOptions, error) {
 }
 
 func parsePathOptions(parts []string, headers http.Header) (*ProcessingOptions, string, error) {
+	if _, ok := resizeTypes[parts[0]]; ok {
+		return nil, "", ierrors.New(
+			404,
+			"It looks like you're using the deprecated basic URL format",
+			"Invalid URL",
+		)
+	}
+
 	po, err := defaultProcessingOptions(headers)
 	if err != nil {
 		return nil, "", err