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Add a bidirectional chat sample to demonstrate SignalR Trigger #101

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Merged
merged 10 commits into from
Mar 16, 2020
Merged

Add a bidirectional chat sample to demonstrate SignalR Trigger #101

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cd4afc9
Add a bi-directional chat sample
zackliu Mar 9, 2020
be8280b
stash
zackliu Mar 10, 2020
fe2c0af
Merge branch 'dev' of github.com:Azure/azure-functions-signalrservice…
zackliu Mar 10, 2020
2519ca3
Merge branch 'dev' into trigger8
zackliu Mar 10, 2020
18dffdc
Merge branch 'dev' into trigger8
zackliu Mar 11, 2020
432cf6d
Simplify trigger usage in C#
zackliu Mar 11, 2020
2f69300
Hide connectionstring
zackliu Mar 11, 2020
31fe376
Add tests and update according to comments
zackliu Mar 12, 2020
3cad150
Improve class based model
zackliu Mar 13, 2020
4ff7265
Fix typo
zackliu Mar 16, 2020
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239 changes: 239 additions & 0 deletions samples/bidirectional-chat/content/index.html
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<html>

<head>
<title>Serverless Chat</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.1.3/dist/css/bootstrap.min.css">
<script>
window.apiBaseUrl = 'http://localhost:7071';
</script>
<style>
.slide-fade-enter-active,
.slide-fade-leave-active {
transition: all 1s ease;
}

.slide-fade-enter,
.slide-fade-leave-to {
height: 0px;
overflow-y: hidden;
opacity: 0;
}
</style>
</head>

<body>
<p>&nbsp;</p>
<div id="app" class="container">
<h3>Serverless chat</h3>
<div class="row" v-if="ready">
<div class="signalr-demo col-sm">
<hr />
<div id='groupchecked'>
<input type="checkbox" id="checkbox" v-model="checked">
<label for="checkbox">Send To Default Group: {{ this.defaultgroup }}</label>
</div>
<form v-on:submit.prevent="sendNewMessage(checked)">
<input type="text" v-model="newMessage" id="message-box" class="form-control" placeholder="Type message here..." />
</form>
</div>
</div>
<div class="row" v-if="!ready">
<div class="col-sm">
<div>Loading...</div>
</div>
</div>
<div v-if="ready">
<transition-group name="slide-fade" tag="div">
<div class="row" v-for="message in messages" v-bind:key="message.id">
<div class="col-sm">
<hr />
<div>
<div style="display: inline-block; padding-left: 12px;">
<div>
<a href="#" v-on:click.prevent="sendPrivateMessage(message.Sender)">
<span class="text-info small">
<strong>{{ message.Sender || message.sender }}</strong>
</span>
</a>
<span v-if="message.ConnectionId || message.connectionId">
<a href="#" v-on:click.prevent="sendToConnection(message.ConnectionId || message.connectionId)">
<span class="badge badge-primary">Connection: {{ message.ConnectionId || message.connectionId }}</span>
</a>
</span>
<a href="#" v-on:click.prevent="addUserToGroup(message.Sender || message.sender)">
<span class="badge badge-primary">AddUserToGroup</span>
</a>
<a href="#" v-on:click.prevent="removeUserFromGroup(message.Sender || message.sender)">
<span class="badge badge-primary">RemoveUserFromGroup</span>
</a>
<a href="#" v-on:click.prevent="addConnectionToGroup(message.ConnectionId || message.connectionId)">
<span v-if="message.ConnectionId || message.connectionId" class="badge badge-primary">AddConnectionToGroup</span>
</a>
<a href="#" v-on:click.prevent="removeConnectionIdFromGroup(message.ConnectionId || message.connectionId)">
<span v-if="message.ConnectionId || message.connectionId" class="badge badge-primary">RemoveConnectionFromGroup</span>
</a>
<span v-if="message.IsPrivate || message.isPrivate" class="badge badge-secondary">private message
</span>
</div>
<div>
{{ message.Text || message.text }}
</div>
</div>
</div>
</div>
</div>
</transition-group>
</div>

<script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@aspnet/signalr@1.0.3/dist/browser/signalr.js"></script>
<script src="https://cdn.jsdelivr.net/npm/axios@0.18.0/dist/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/crypto-js@3.1.9-1/crypto-js.js"></script>
<script src="https://cdn.jsdelivr.net/npm/crypto-js@3.1.9-1/enc-base64.js"></script>
<script>
const data = {
username: '',
defaultgroup: 'AzureSignalR',
checked: false,
newMessage: '',
messages: [],
myConnectionId: '',
ready: false
};
const app = new Vue({
el: '#app',
data: data,
methods: {
sendNewMessage: function (isToGroup) {
if (isToGroup) {
connection.invoke("sendToGroup", this.defaultgroup, this.newMessage);
}
else {
connection.invoke("broadcast", this.newMessage);
}
this.newMessage = '';
},
sendPrivateMessage: function (user) {
const messageText = prompt('Send private message to ' + user);

if (messageText) {
connection.invoke("sendToUser", user, messageText);
}
},
sendToConnection: function (connectionId) {
const messageText = prompt('Send private message to connection ' + connectionId);

if (messageText) {
connection.invoke("sendToConnection", connectionId, messageText);
}
},
addConnectionToGroup: function(connectionId) {
confirm('Add connection ' + connectionId + ' to group: ' + this.defaultgroup);
connection.invoke("joinGroup", connectionId, this.defaultgroup);
},
addUserToGroup: function (user) {
r = confirm('Add user ' + user + ' to group: ' + this.defaultgroup);
connection.invoke("joinUserToGroup", user, this.defaultgroup);
},
removeConnectionIdFromGroup: function(connectionId) {
confirm('Remove connection ' + connectionId + ' from group: ' + this.defaultgroup);
connection.invoke("leaveGroup", connectionId, this.defaultgroup);
},
removeUserFromGroup: function(user) {
confirm('Remove user ' + user + ' from group: ' + this.defaultgroup);
connection.invoke("leaveUserFromGroup", user, this.defaultgroup);
}
}
});
const apiBaseUrl = prompt('Enter the Azure Function app base URL', window.apiBaseUrl);
data.username = prompt("Enter your username");
const isAdmin = confirm('Work as administrator? (only an administrator can broadcast messages)');
if (!data.username) {
alert("No username entered. Reload page and try again.");
throw "No username entered";
}
const connection = new signalR.HubConnectionBuilder()
.withUrl(apiBaseUrl + '/api', {
accessTokenFactory: () => {
return generateAccessToken(data.username)
}
})
.configureLogging(signalR.LogLevel.Information)
.build();
connection.on('newMessage', onNewMessage);
connection.on('newConnection', onNewConnection)
connection.onclose(() => console.log('disconnected'));
console.log('connecting...');
connection.start()
.then(() => {
data.ready = true;
console.log('connected!');
})
.catch(console.error);
function getAxiosConfig() {
const config = {
headers: {
'x-ms-signalr-user-id': data.username,
'Authorization': 'Bearer ' + generateAccessToken(data.username)
}
};
return config;
}
let counter = 0;
function onNewMessage(message) {
message.id = counter++; // vue transitions need an id
data.messages.unshift(message);
};
function onNewConnection(message) {
data.myConnectionId = message.ConnectionId;
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Do we want to do a camel case conversion for class members? (ConnectionId -> connectionId) I think SignalR by default does this conversion.

}

function base64url(source) {
// Encode in classical base64
encodedSource = CryptoJS.enc.Base64.stringify(source);

// Remove padding equal characters
encodedSource = encodedSource.replace(/=+$/, '');

// Replace characters according to base64url specifications
encodedSource = encodedSource.replace(/\+/g, '-');
encodedSource = encodedSource.replace(/\//g, '_');

return encodedSource;
}

// this function should be in auth server, do not expose your secret
function generateAccessToken(userName) {
var header = {
"alg": "HS256",
"typ": "JWT"
};

var stringifiedHeader = CryptoJS.enc.Utf8.parse(JSON.stringify(header));
var encodedHeader = base64url(stringifiedHeader);

// customize your JWT token payload here
var data = {
"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name": userName,
"exp": 1699819025,
'admin': isAdmin
};

var stringifiedData = CryptoJS.enc.Utf8.parse(JSON.stringify(data));
var encodedData = base64url(stringifiedData);

var token = encodedHeader + "." + encodedData;

var secret = "myfunctionauthtest"; // do not expose your secret here

var signature = CryptoJS.HmacSHA256(token, secret);
signature = base64url(signature);

var signedToken = token + "." + signature;

return signedToken;
}
</script>
</body>

</html>
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