feat: Add error message to header for HTML error responses

server.py

@@ -149,6 +149,18 @@ def javascript_get(name):
         return error_response(request)
     return send_from_directory("templates/assets/js", request.path.split("/")[-1])
 
+
+@app.route("/download/<path:path>")
+def download_get(path):
+    if path not in DOWNLOAD_ROUTES:
+        return error_response(request, message="Invalid download")
+    # Check if file exists
+    path = DOWNLOAD_ROUTES[path]
+    if os.path.isfile(path):
+        return send_file(path)
+
+    return error_response(request, message="File not found")
+
 # endregion
 # region PWA routes
 
@@ -553,7 +565,7 @@ def qrcode_get(data):
     qr.make()
 
     qr_image: Image.Image = qr.make_image(
-        fill_color="black", back_color="white").convert('RGB') # type: ignore
+        fill_color="black", back_color="white").convert('RGB')  # type: ignore
 
     # Add logo
     logo = Image.open("templates/assets/img/favicon/logo.png")
@@ -583,18 +595,6 @@ def supersecretpath_get():
     return render_template("ascii.html", ascii_art=ascii_art_html)
 
 
-@app.route("/download/<path:path>")
-def download_get(path):
-    if path not in DOWNLOAD_ROUTES:
-        return error_response(request, message="Invalid download")
-    # Check if file exists
-    path = DOWNLOAD_ROUTES[path]
-    if os.path.isfile(path):
-        return send_file(path)
-    
-    return error_response(request, message="File not found")
-
-
 @app.route("/hosting/send-enquiry", methods=["POST"])
 def hosting_post():
     global EMAIL_REQUEST_COUNT
@@ -681,7 +681,7 @@ def hosting_post():
     webhook_url = os.getenv("HOSTING_WEBHOOK")
     if not webhook_url:
         return json_response(request, "Hosting webhook not set", 500)
-    
+
     data = {
         "content": "",
         "embeds": [
@@ -756,11 +756,13 @@ def catch_all_get(path: str):
 
     return error_response(request)
 
+
 @app.errorhandler(404)
 def not_found(e):
     return error_response(request)
 
 # endregion
 
+
 if __name__ == "__main__":
     app.run(debug=True, port=5000, host="127.0.0.1")

tools.py

@@ -1,7 +1,8 @@
-from flask import Request, render_template, jsonify
+from flask import Request, render_template, jsonify, make_response
 import os
 from functools import cache
 
+
 def getClientIP(request):
     x_forwarded_for = request.headers.get("X-Forwarded-For")
     if x_forwarded_for:
@@ -10,6 +11,7 @@ def getClientIP(request):
         ip = request.remote_addr
     return ip
 
+
 def getGitCommit():
     # if .git exists, get the latest commit hash
     if os.path.isdir(".git"):
@@ -34,7 +36,7 @@ def getGitCommit():
 def isCurl(request: Request) -> bool:
     """
     Check if the request is from curl
-    
+
     Args:
         request (Request): The Flask request object
     Returns:
@@ -47,6 +49,7 @@ def isCurl(request: Request) -> bool:
             return True
     return False
 
+
 def isCrawler(request: Request) -> bool:
     """
     Check if the request is from a web crawler (e.g., Googlebot, Bingbot)
@@ -79,6 +82,7 @@ def getFilePath(name, path):
         if name in files:
             return os.path.join(root, name)
 
+
 def json_response(request: Request, message: str = "404 Not Found", code: int = 404):
     return jsonify(
         {
@@ -92,8 +96,14 @@ def json_response(request: Request, message: str = "404 Not Found", code: int =
 def error_response(request: Request, message: str = "404 Not Found", code: int = 404, force_json: bool = False):
     if force_json or isCurl(request):
         return json_response(request, message, code)
-    
+
     # Check if <error code>.html exists in templates
+    response = make_response(render_template(
+        "404.html", code=code, message=message), code)
     if os.path.isfile(f"templates/{code}.html"):
-        return render_template(f"{code}.html"), code
+        response = make_response(render_template(
-    return render_template("404.html"), code
+            f"{code}.html", code=code, message=message), code)
+
+    # Add message to response headers
+    response.headers["X-Error-Message"] = message
+    return response