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Create app.py
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app.py
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import asyncio
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from starlette.applications import Starlette
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from starlette.endpoints import WebSocketEndpoint, HTTPEndpoint
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from starlette.responses import HTMLResponse
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from starlette.routing import Route, WebSocketRoute, Mount
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from starlette.websockets import WebSocket
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from starlette.types import Message, Receive, Scope, Send
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# -------------------- gradio ------------------------
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import gradio as gr
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async def name_fn(name):
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await mbase.add_msg(f'gradio_name: {name}')
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return "Name: " + name + "!"
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io = gr.Interface(fn=name_fn, inputs=gr.Textbox(lines=2, placeholder="Name Here..."), outputs="text")
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gradio_app = gr.routes.App.create_app(io)
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# -------------------- shiny ------------------------
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import shiny
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from shiny import App, render, ui, reactive
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import numpy as np
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import matplotlib.pyplot as plt
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app_ui = ui.page_fluid(
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ui.input_slider("n", "Number of bins", 1, 100, 20),
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ui.output_plot("plot", width='30%', height='120px'),
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)
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def server(input, output, session):
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@output
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@render.plot(alt="A histogram")
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async def plot():
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await mbase.add_msg(f'shiny_bin: {input.n()}')
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x = 100 + 15 * np.random.randn(120)
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fig, ax = plt.subplots()
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ax.hist(x, input.n(), density=True)
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return fig
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app_shiny = App(ui = app_ui, server = server)
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# -------------------- main + msg store and dispatch ------------------------
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ws_list = []
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class MsgBase():
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""" Store and send messages to clients """
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msg_history = ['start logging..',]
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async def add_msg(self, msg):
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self.msg_history.insert(0, msg)
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if len(self.msg_history) > 15:
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self.msg_history.pop()
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for ws in ws_list:
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await ws.send_text(msg)
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async def send_all_msg(self, ws):
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""" Restore all messages in new page or reloaded page"""
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ws_list.append(ws)
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for msg in self.msg_history:
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await ws.send_text(msg)
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mbase = MsgBase()
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html = """
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<!DOCTYPE html>
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<html><head><title>Shiny and Gradio Test App</title>
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<style>
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.bottom_div { position:absolute; background: #E8F8E8; bottom:0; width:99%; height:100px; max-height: 30%; overflow-y: auto;}
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.log_msg { font-size: 0.75em; font-family: sans-serif; padding: .2em; margin: 0; line-height: 1em;}
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</style>
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</head>
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<body>
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<script type="text/javascript">
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var ws = new WebSocket("ws://localhost:8000/ws");
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ws.onmessage = function(event) {
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var newNode = document.createElement('li');
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var content = document.createTextNode(event.data);
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newNode.appendChild(content);
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var messages = document.getElementById('log_msg');
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messages.insertBefore(newNode, messages.children[0]);
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// remove last evement
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remove_idx = messages.getElementsByTagName("li").length -1;
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if (remove_idx > 15) {
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messages.children[remove_idx].remove();
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}
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}
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</script>
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Shiny App
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<iframe src="/shiny/" width="100%" height="250" style="border:1px solid blue;"></iframe>
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Gradio App
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<iframe src="/gradio/" width="100%" height="250" style="border:1px solid red;"></iframe>
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<div class="bottom_div"><ul class="log_msg" id="log_msg"></ul></div>
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</body>
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</html>"""
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class Homepage(HTTPEndpoint):
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async def get(self, request):
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return HTMLResponse(html)
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class Echo(WebSocketEndpoint):
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async def on_connect(self, websocket: WebSocket) -> None:
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await websocket.accept()
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await mbase.send_all_msg(websocket)
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async def on_disconnect(self, websocket: WebSocket, close_code: int) -> None:
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ws_list.remove(websocket)
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routes = [
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Route("/", Homepage),
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WebSocketRoute("/ws", Echo),
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Mount('/shiny', app=app_shiny),
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Mount('/gradio', app=gradio_app)
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]
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app = Starlette(routes=routes)
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# as a main work loop..
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@app.on_event("startup")
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async def startup_event():
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asyncio.create_task(dispatch_task())
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async def dispatch_task():
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""" background task to dispatch autonomous events """
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for i in range(20):
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await mbase.add_msg(f'(main loop) I am work!({i})')
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await asyncio.sleep(8)
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