From d7a41c813fc94c560d8ccad46e2d17dc38300b84 Mon Sep 17 00:00:00 2001
From: m-tartari <37861893+m-tartari@users.noreply.github.com>
Date: Thu, 26 Sep 2024 16:29:23 +0200
Subject: [PATCH] fix(#72): disable http caching of `index.html`

set response headers to:
HTTP/1.1 200 OK
Expires: Fri, May 11 2018 10:48:51 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
---
 src/modular/web/RobotDesignStudio.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/modular/web/RobotDesignStudio.py b/src/modular/web/RobotDesignStudio.py
index 32eac1e..a26e96c 100755
--- a/src/modular/web/RobotDesignStudio.py
+++ b/src/modular/web/RobotDesignStudio.py
@@ -24,7 +24,7 @@
 import numpy as np
 
 import rospy
-from flask import Flask, Response, render_template, request, jsonify, send_from_directory, abort, session, send_file
+from flask import Flask, Response, make_response, render_template, request, jsonify, send_from_directory, abort, session, send_file
 from apscheduler.schedulers.background import BackgroundScheduler
 import werkzeug
 
@@ -192,7 +192,14 @@ def index():
             last_updated= datetime.now(),
             )
 
-    return render_template('index.html')
+    # for the index page we want to disable caching
+    index_page = make_response(render_template('index.html'))
+    # exparies in the past (date of the first commit of the project)
+    index_page.headers['Expires'] = 'Fri, May 11 2018 10:48:51 GMT'
+    index_page.headers['Cache-Control'] = 'max-age=0, no-cache, no-store'
+    index_page.headers['Pragma'] = 'no-cache'
+    return index_page
+
 
 # Get workspace mode
 @app.route(f'{api_base_route}/mode', methods=['GET'])