Add endpoint for logging uncaught client exceptions (hedyorg#498)

* Add endpoint for logging uncaught client exceptions

app.py

@@ -338,6 +338,21 @@ def report_error():
 
     return 'logged'
 
+@app.route('/client_exception', methods=['POST'])
+def report_client_exception():
+    post_body = request.json
+
+    querylog.log_value(
+        session=session_id(),
+        date=str(datetime.datetime.now()),
+        client_error=post_body,
+        version=version(),
+        username=current_user(request) ['username'] or None,
+        is_test=1 if os.getenv ('IS_TEST_ENV') else None
+    )
+
+    return 'logged', 500
+
 @app.route('/version', methods=['GET'])
 def version_page():
     """

static/js/app.js

@@ -321,6 +321,23 @@ function reportClientError(level, code, client_error) {
   });
 }
 
+window.onerror = function reportClientException(message, source, line_number, column_number, error) {
+
+  $.ajax({
+    type: 'POST',
+    url: '/client_exception',
+    data: JSON.stringify({
+      message: message,
+      source: source,
+      line_number: line_number,
+      column_number: column_number,
+      error: error
+    }),
+    contentType: 'application/json',
+    dataType: 'json'
+  });
+}
+
 function runPythonProgram(code, cb) {
   const outputDiv = $('#output');
   outputDiv.empty();