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Add simple sse example #293

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Add simple sse example #293

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aa10ee5
Add simple SSE example
audreyfeldroy Aug 14, 2024
3e5b263
Remove clock class, don't need it
audreyfeldroy Aug 14, 2024
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25 changes: 25 additions & 0 deletions examples/sse_clock.py
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Original file line number Diff line number Diff line change
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import asyncio
from datetime import datetime
from fasthtml.common import *
from starlette.responses import StreamingResponse

sselink = Script(src="https://unpkg.com/htmx-ext-sse@2.2.1/sse.js")
app, rt = fast_app(hdrs=(sselink,))

@rt("/")
def get():
return Titled("SSE Clock",
P("XX:XX", sse_swap="TimeUpdateEvent",
hx_ext="sse", sse_connect="/time-sender"))

async def time_generator():
while True:
yield f"""event: TimeUpdateEvent\ndata: {to_xml(P(datetime.now().strftime('%H:%M:%S'), sse_swap="TimeUpdateEvent"))}\n\n"""
await asyncio.sleep(1)

@rt("/time-sender")
async def get():
"Send time to all connected clients every second"
return StreamingResponse(time_generator(), media_type="text/event-stream")

serve()
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