From b84678a8ab186e7b6038a74f14b7f993369a693f Mon Sep 17 00:00:00 2001
From: Minhao Qiu <minhao.qiu@fau.de>
Date: Tue, 24 Sep 2019 17:29:44 +0200
Subject: [PATCH] add web socket io demo
---
app_9/__pycache__/app.cpython-36.pyc | Bin 0 -> 782 bytes
app_9/app.py | 26 ++++++++++++++++++++++++++
app_9/static/js/index.js | 26 ++++++++++++++++++++++++++
app_9/templates/index.html | 16 ++++++++++++++++
4 files changed, 68 insertions(+)
create mode 100644 app_9/__pycache__/app.cpython-36.pyc
create mode 100644 app_9/app.py
create mode 100644 app_9/static/js/index.js
create mode 100644 app_9/templates/index.html
diff --git a/app_9/__pycache__/app.cpython-36.pyc b/app_9/__pycache__/app.cpython-36.pyc
new file mode 100644
index 0000000000000000000000000000000000000000..36157c048ca7cee25fb7a9fac47caf3e442510db
GIT binary patch
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diff --git a/app_9/app.py b/app_9/app.py
new file mode 100644
index 0000000..74ada1a
--- /dev/null
+++ b/app_9/app.py
@@ -0,0 +1,26 @@
+import os
+import requests
+
+from flask import Flask, jsonify, render_template, request
+from flask_socketio import SocketIO, emit
+
+app = Flask(__name__)
+app.config["SECRET_KEY"] = os.getenv("SECRET_KEY")
+socketio = SocketIO(app)
+
+# A list which is used to save the history vote
+history = []
+
+@app.route("/")
+def index():
+ return render_template("index.html")
+
+@socketio.on('submit vote')
+def vote(data):
+ selection = data["selection"]
+ history.append("selection: " + selection)
+ emit('announce vote', {"selection": selection}, broadcast=True)
+ print(history)
+
+if __name__ == '__main__':
+ socketio.run(app)
\ No newline at end of file
diff --git a/app_9/static/js/index.js b/app_9/static/js/index.js
new file mode 100644
index 0000000..3f403d9
--- /dev/null
+++ b/app_9/static/js/index.js
@@ -0,0 +1,26 @@
+
+document.addEventListener('DOMContentLoaded', () => {
+
+ // Connect to websocket
+ var socket = io.connect(location.protocol + '//' + document.domain + ':' + location.port);
+
+ // When connected, configure buttons
+ socket.on('connect', () => {
+
+ // Each button should emit a "submit vote" event
+ document.querySelectorAll('button').forEach(button => {
+ button.onclick = () => {
+ const selection = button.dataset.vote;
+ socket.emit('submit vote', {'selection': selection});
+ };
+ });
+ });
+
+ // When a new vote is announced, add to the unordered list
+ socket.on('announce vote', data => {
+ const li = document.createElement('li');
+ li.innerHTML = `Vote recorded: ${data.selection}`;
+ document.querySelector('#votes').append(li);
+ });
+
+});
\ No newline at end of file
diff --git a/app_9/templates/index.html b/app_9/templates/index.html
new file mode 100644
index 0000000..09b764c
--- /dev/null
+++ b/app_9/templates/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.js"></script>
+ <script src="{{ url_for('static', filename='js/index.js') }}"></script>
+ <title>Vote</title>
+ </head>
+ <body>
+ <ul id="votes">
+ </ul>
+ <hr>
+ <button data-vote="yes">Yes</button>
+ <button data-vote="no">No</button>
+ <button data-vote="maybe">Maybe</button>
+ </body>
+</html>
\ No newline at end of file
--
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