Handle HTTP errors gracefully.

2 files changed, 28 insertions, 1 deletions

diff --git a/qc_app/errors.py b/qc_app/errors.py
index 1ce0d1f..bcd3543 100644
--- a/qc_app/errors.py
+++ b/qc_app/errors.py
@@ -13,8 +13,17 @@ def handle_general_exception(exc: Exception):
         exc.__class__.__module__, exc.__class__.__name__, request.url, trace)
     return render_template("unhandled_exception.html", trace=trace)
 
+def handle_http_exception(exc: HTTPException):
+    """Handle HTTP exceptions."""
+    app.logger.error(
+        "HTTP Error %s: %s", exc.code, exc.description, exc_info=True)
+    return render_template(f"http-error.html",
+                           request_url=request.url,
+                           exc=exc,
+                           trace=traceback.format_exception(exc)), exc.code
+
 def register_error_handlers(appl: Flask):
     """Register top-level error/exception handlers."""
     appl.register_error_handler(Exception, handle_general_exception)
-    appl.register_error_handler(HTTPException, handle_general_exception)
+    appl.register_error_handler(HTTPException, handle_http_exception)
     appl.register_error_handler(mdb.MySQLError, handle_general_exception)
diff --git a/qc_app/templates/http-error.html b/qc_app/templates/http-error.html
new file mode 100644
index 0000000..6a74ae8
--- /dev/null
+++ b/qc_app/templates/http-error.html
@@ -0,0 +1,18 @@
+{%extends "base.html"%}
+
+{%block title%}HTTP Error: {{exc.code}}{%endblock%}
+
+{%block contents%}
+<h1>{{exc.code}}: {{exc.description}}</h1>
+
+<div class="row">
+  <p>
+    You attempted to access {{request_url}} which failed with the following
+    error:
+  </p>
+</div>
+
+<div class="row">
+  <pre>{{trace}}</pre>
+</div>
+{%endblock%}