From 645475e459b61ef1bcb53ebdb4d60e694a072bb5 Mon Sep 17 00:00:00 2001
From: Lars Holmberg <lars.holmberg@svenskaspel.se>
Date: Thu, 2 Sep 2021 12:39:57 +0200
Subject: [PATCH] Disable setting custom parameters of None or boolean type in
 web UI. Fixes #1870

---
 locust/templates/index.html | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/locust/templates/index.html b/locust/templates/index.html
index 6c7aba27d5..3fc4921987 100644
--- a/locust/templates/index.html
+++ b/locust/templates/index.html
@@ -80,8 +80,20 @@ <h2>Start new load test</h2>
                     <input type="text" name="host" id="host" class="val" autocapitalize="off" autocorrect="off" value="{{ host  or "" }}" onfocus="this.select()"/><br>
                     {% if extra_options %}<label>Custom parameters:</label>{% endif %}
                     {% for key, value in extra_options.items() %}
-                        <label for="{{key}}">{{key}}</label>
-                        <input type="text" name="{{key}}" id="{{key}}" class="val" value="{{value}}" /><br>
+                        {% if not ((value is none) or (value is boolean)) %}
+                            <label for="{{key}}">{{key}}</label>
+                            <input type="text" name="{{key}}" id="{{key}}" class="val" value="{{value}}" /><br>
+                        {% endif %}
+                    {% endfor %}
+                    {% set glob={'header_printed': False} %}
+                    {% for key, value in extra_options.items() %}
+                        {% if (value is none) or (value is boolean) %}
+                            {% if not glob.header_printed %}
+                                The following custom parameters can't be set in the Web UI, because it is a boolean or None type:<br>
+                                {% set _ = glob.update({'header_printed':True}) %}
+                            {% endif %}
+                            {{key}}<br>
+                        {% endif %}
                     {% endfor %}
                     <button type="submit">Start swarming</button>
                 </form>