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Here's my thought on 💭 Automatic browser reloading in FastAPI
I just discovered arel for hot reloading python applications when content changes from this snippet that implements it for fatapi.
On app startup add the /hot-reload routes if in DEBUG mode.
import os
import arel
from fastapi import FastAPI, Request
from fastapi.templating import Jinja2Templates
app = FastAPI()
templates = Jinja2Templates("templates")
if _debug := os.getenv("DEBUG"):
hot_reload = arel.HotReload(paths=[arel.Path(".")])
app.add_websocket_route("/hot-reload", route=hot_reload, name="hot-reload")
app.add_event_handler("startup", hot_reload.startup)
app.add_event_handler("shutdown", hot_reload.shutdown)
templates.env.globals["DEBUG"] = _debug
templates.env.globals["hot_reload"] = hot_reload
@app.get("/")
def index(request: Request):
return templates.TemplateResponse("index.html", context={"request": request})
run: #
DEBUG=true uvicorn main:app --reload #
install arel and make sure you have uvicorn[standard] for websocket support.
fastapi
uvicorn[standard]
arel
jinja2
In the template, load the script when in debug mode.
<body>
{% block content %}{% endblock %}
<!-- Hot reload script -->
{% if DEBUG %} {{ hot_reload.script(url_for('hot-reload')) | safe }} {% endif
%}
</body>
!!! note This post is a thought. It's a short note that I make about someone else's content online. Learn more about the process [[ thoughts ]]
{.text-opacity-80} This post was a thought by Waylon Walker see all my thoughts at https://waylonwalker.com/thoughts