├── .gitignore ├── LICENSE ├── README.md ├── cloudformation └── template.yaml ├── deploy.sh ├── fn └── index.js ├── iam ├── cognito.json └── fn.json ├── iot └── rules.txt ├── sync_static.sh ├── undeploy.sh └── www ├── custom.css ├── index.html └── index.js /.gitignore: -------------------------------------------------------------------------------- 1 | tmp 2 | cloudformation/* 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Serverless Chat 2 | 3 | A serverless web chat built using AWS Lambda, AWS IoT (for WebSockets) and Amazon DynamoDB. 4 | 5 | The architecture of this application is described in this article: 6 | 7 | - [Serverless beyond Functions](https://medium.com/danilop/serverless-beyond-functions-cd81ee4c6b8d) 8 | 9 | ## Deploying to AWS 10 | 11 | A script is provided, `deploy.sh` which uses AWS CloudFormation to provision all the resources needed for this demo. To use it: 12 | 13 | - Create an AWS account. 14 | - Visit the [IoT management page](https://console.aws.amazon.com/iot/home) in the AWS web console and ensure that an IoT endpoint has been provisioned for your account. 15 | - Install the [AWS command line tools](https://aws.amazon.com/cli/) and set up your credentials. 16 | - Run the `deploy.sh` script, specifying a name for your new CloudFormation stack, an AWS region and the name of an S3 bucket where the CloudFormation config files will be stored. The S3 bucket will be created if it does not exist. 17 | 18 | ./deploy.sh LambdaChatStack us-west-1 my.s3.bucket.name 19 | 20 | Once the AWS resources have been provisioned, the script will print a URL to visit in your browser to see the demo. 21 | 22 | NB: The Kinesis functionality has been disabled because it is billed per shard-hour. To enable it, edit `cloudformation/template.yaml` and uncomment the relevant lines before running `deploy.sh`. 23 | -------------------------------------------------------------------------------- /cloudformation/template.yaml: -------------------------------------------------------------------------------- 1 | AWSTemplateFormatVersion: '2010-09-09' 2 | Parameters: 3 | AwsIoTEndpoint: 4 | Type: String 5 | Outputs: 6 | IdentityPoolId: 7 | Value: !Ref ChatIdentityPool 8 | Resources: 9 | ChatFunction: 10 | Type: AWS::Lambda::Function 11 | Properties: 12 | Handler: index.handler 13 | Code: ../fn 14 | Runtime: nodejs6.10 15 | Role: !GetAtt ChatFunctionRole.Arn 16 | Environment: 17 | Variables: 18 | AWS_IOT_ENDPOINT: !Ref AwsIoTEndpoint 19 | ChatIdentityPool: 20 | Type: AWS::Cognito::IdentityPool 21 | Properties: 22 | IdentityPoolName: chatPool 23 | AllowUnauthenticatedIdentities: true 24 | ChatIdentityPoolRoleAttachment: 25 | Type: AWS::Cognito::IdentityPoolRoleAttachment 26 | Properties: 27 | IdentityPoolId: !Ref ChatIdentityPool 28 | Roles: 29 | unauthenticated: !GetAtt CognitoUnauthenticatedRole.Arn 30 | ChatTable: 31 | Type: AWS::DynamoDB::Table 32 | Properties: 33 | AttributeDefinitions: 34 | - 35 | AttributeName: room 36 | AttributeType: S 37 | - 38 | AttributeName: timestamp 39 | AttributeType: N 40 | KeySchema: 41 | - 42 | AttributeName: room 43 | KeyType: HASH 44 | - 45 | AttributeName: timestamp 46 | KeyType: RANGE 47 | ProvisionedThroughput: 48 | ReadCapacityUnits: 2 49 | WriteCapacityUnits: 2 50 | TableName: chat 51 | TimeToLiveSpecification: 52 | AttributeName: ttl 53 | Enabled: true 54 | ChatRule: 55 | Type: AWS::IoT::TopicRule 56 | Properties: 57 | RuleName: chatRule 58 | TopicRulePayload: 59 | AwsIotSqlVersion: '2016-03-23' 60 | RuleDisabled: false 61 | Sql: "SELECT *, clientId() AS clientId, timestamp() AS timestamp FROM 'chat/out'" 62 | Actions: 63 | - Lambda: 64 | FunctionArn: !GetAtt ChatFunction.Arn 65 | ChatPresenceRule: 66 | Type: AWS::IoT::TopicRule 67 | Properties: 68 | RuleName: chatPresenceRule 69 | TopicRulePayload: 70 | AwsIotSqlVersion: '2016-03-23' 71 | RuleDisabled: false 72 | Sql: "SELECT * FROM '$aws/events/presence/#'" 73 | Actions: 74 | - Lambda: 75 | FunctionArn: !GetAtt ChatFunction.Arn 76 | ChatStoreRule: 77 | Type: AWS::IoT::TopicRule 78 | Properties: 79 | RuleName: chatStore 80 | TopicRulePayload: 81 | AwsIotSqlVersion: '2016-03-23' 82 | RuleDisabled: false 83 | Sql: "SELECT *, timestamp() AS timestamp, round(timestamp() / 1000) + 86400 AS ttl FROM 'chat/pub/#'" 84 | Actions: 85 | - DynamoDBv2: 86 | PutItem: 87 | TableName: chat 88 | RoleArn: !GetAtt ChatStoreRole.Arn 89 | ChatStoreRole: 90 | Type: AWS::IAM::Role 91 | Properties: 92 | AssumeRolePolicyDocument: 93 | Version: '2012-10-17' 94 | Statement: 95 | - 96 | Action: sts:AssumeRole 97 | Effect: Allow 98 | Principal: 99 | Service: ['iot.amazonaws.com'] 100 | Policies: 101 | - 102 | PolicyName: ChatStorePolicy 103 | PolicyDocument: 104 | Version: '2012-10-17' 105 | Statement: 106 | - 107 | Action: dynamodb:PutItem 108 | Effect: Allow 109 | Resource: 110 | - !GetAtt ChatTable.Arn 111 | ChatPublishRule: 112 | Type: AWS::IoT::TopicRule 113 | Properties: 114 | RuleName: chatPubRule 115 | TopicRulePayload: 116 | AwsIotSqlVersion: '2016-03-23' 117 | RuleDisabled: false 118 | Sql: "SELECT *, clientId() AS clientId, timestamp() AS timestamp FROM 'chat/out' WHERE NOT isUndefined(message) AND NOT isUndefined(room)" 119 | Actions: 120 | - Republish: 121 | Topic: 'chat/pub${room}' 122 | RoleArn: !GetAtt ChatPublishRole.Arn 123 | ChatPublishRole: 124 | Type: AWS::IAM::Role 125 | Properties: 126 | AssumeRolePolicyDocument: 127 | Version: 2012-10-17 128 | Statement: 129 | - Effect: Allow 130 | Action: sts:AssumeRole 131 | Principal: 132 | Service: 133 | - iot.amazonaws.com 134 | Policies: 135 | - PolicyName: ChatPublishPolicy 136 | PolicyDocument: 137 | Version: 2012-10-17 138 | Statement: 139 | - Effect: Allow 140 | Action: iot:Publish 141 | Resource: !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topic/chat/pub/*' 142 | ChatRulePermission: 143 | Type: AWS::Lambda::Permission 144 | Properties: 145 | SourceArn: !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:rule/${ChatRule}' 146 | Action: lambda:InvokeFunction 147 | Principal: iot.amazonaws.com 148 | FunctionName: !GetAtt ChatFunction.Arn 149 | SourceAccount: !Ref AWS::AccountId 150 | ChatPresenceRulePermission: 151 | Type: AWS::Lambda::Permission 152 | Properties: 153 | SourceArn: !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:rule/${ChatPresenceRule}' 154 | Action: lambda:InvokeFunction 155 | Principal: iot.amazonaws.com 156 | FunctionName: !GetAtt ChatFunction.Arn 157 | SourceAccount: !Ref AWS::AccountId 158 | ChatFunctionRole: 159 | Type: AWS::IAM::Role 160 | Properties: 161 | ManagedPolicyArns: ['arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'] 162 | AssumeRolePolicyDocument: 163 | Version: '2012-10-17' 164 | Statement: 165 | - 166 | Action: sts:AssumeRole 167 | Effect: Allow 168 | Principal: 169 | Service: ['lambda.amazonaws.com'] 170 | Policies: 171 | - 172 | PolicyName: ChatFunctionRolePolicy 173 | PolicyDocument: 174 | Version: '2012-10-17' 175 | Statement: 176 | - 177 | Action: iot:Connect 178 | Effect: Allow 179 | Resource: ['*'] 180 | - 181 | Action: dynamodb:Query 182 | Effect: Allow 183 | Resource: 184 | - !GetAtt ChatTable.Arn 185 | - 186 | Action: iot:Publish 187 | Effect: Allow 188 | Resource: 189 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topic/chat/in/*' 190 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topic/chat/pub/*' 191 | # Uncomment to enable Kinesis 192 | # - 193 | # Action: 194 | # - 'kinesis:DescribeStream' 195 | # - 'kinesis:GetShardIterator' 196 | # - 'kinesis:GetRecords' 197 | # - 'kinesis:ListStreams' 198 | # Effect: Allow 199 | # Resource: 200 | # - !GetAtt ChatStream.Arn 201 | CognitoUnauthenticatedRole: 202 | Type: AWS::IAM::Role 203 | Properties: 204 | AssumeRolePolicyDocument: 205 | Version: "2012-10-17" 206 | Statement: 207 | - Effect: Allow 208 | Principal: 209 | Federated: cognito-identity.amazonaws.com 210 | Action: sts:AssumeRoleWithWebIdentity 211 | Condition: 212 | StringEquals: 213 | "cognito-identity.amazonaws.com:aud": !Ref ChatIdentityPool 214 | Policies: 215 | - 216 | PolicyName: CognitoUnauthenticatedPolicy 217 | PolicyDocument: 218 | Version: '2012-10-17' 219 | Statement: 220 | - 221 | Action: iot:Connect 222 | Effect: Allow 223 | Resource: ['*'] 224 | - 225 | Action: iot:Publish 226 | Effect: Allow 227 | Resource: 228 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topic/chat/out' 229 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topic/chat/stream' 230 | - 231 | Action: iot:Subscribe 232 | Effect: Allow 233 | Resource: 234 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topicfilter/chat/in/*' 235 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topicfilter/chat/pub/*' 236 | - 237 | Action: iot:Receive 238 | Effect: Allow 239 | Resource: 240 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topic/chat/in/*' 241 | - !Sub 'arn:aws:iot:${AWS::Region}:${AWS::AccountId}:topic/chat/pub/*' 242 | - 243 | Action: 244 | - translate:TranslateText 245 | - comprehend:DetectDominantLanguage 246 | Effect: Allow 247 | Resource: ['*'] 248 | # Uncomment to enable Kinesis 249 | # ChatStream: 250 | # Type: AWS::Kinesis::Stream 251 | # Properties: 252 | # Name: chat 253 | # ShardCount: 1 254 | # ChatStreamRule: 255 | # Type: AWS::IoT::TopicRule 256 | # Properties: 257 | # RuleName: chatStreamRule 258 | # TopicRulePayload: 259 | # AwsIotSqlVersion: '2016-03-23' 260 | # RuleDisabled: false 261 | # Sql: "SELECT *, clientId() AS clientId, timestamp() AS timestamp FROM 'chat/stream'" 262 | # Actions: 263 | # - Kinesis: 264 | # StreamName: chat 265 | # PartitionKey: '${topic()}' 266 | # RoleArn: !GetAtt ChatStreamRole.Arn 267 | # ChatStreamRole: 268 | # Type: AWS::IAM::Role 269 | # Properties: 270 | # AssumeRolePolicyDocument: 271 | # Version: 2012-10-17 272 | # Statement: 273 | # - Effect: Allow 274 | # Action: 275 | # - sts:AssumeRole 276 | # Principal: 277 | # Service: 278 | # - iot.amazonaws.com 279 | # Policies: 280 | # - PolicyName: ChatStreamPolicy 281 | # PolicyDocument: 282 | # Version: 2012-10-17 283 | # Statement: 284 | # - Effect: Allow 285 | # Action: kinesis:PutRecord 286 | # Resource: !GetAtt ChatStream.Arn 287 | -------------------------------------------------------------------------------- /deploy.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | set -e 3 | 4 | # Before runing this script, open the IoT console to create an endpoint for your account. 5 | 6 | STACK_NAME=${1:?Usage: deploy.sh } 7 | AWS_REGION=${2:?Usage: deploy.sh } 8 | S3_BUCKET=${3:?Usage: deploy.sh } 9 | 10 | mkdir -p tmp 11 | 12 | echo Fetching IoT endpoint URL 13 | AWS_IOT_ENDPOINT=`aws iot describe-endpoint --endpoint-type iot:Data-ATS --region eu-west-1 | perl -lne 'print $1 if /"endpointAddress": "([^"]+)"/'` 14 | 15 | echo Checking S3 bucket 16 | if ! aws s3 ls s3://${S3_BUCKET} >/dev/null; then 17 | echo Creating S3 bucket to host CloudFormation config files 18 | aws s3 mb s3://${S3_BUCKET} --region ${AWS_REGION} 19 | fi 20 | 21 | # Zips up the current directory, writes the zip file to S3, adds a 22 | # CodeUri property for any lambdas with the S3 path to the zip file 23 | # (the template file on S3 does not contain the CodeUri) 24 | echo Packaging CloudFormation template 25 | aws cloudformation package \ 26 | --template-file cloudformation/template.yaml \ 27 | --output-template-file tmp/app.yaml \ 28 | --s3-bucket ${S3_BUCKET} >/dev/null 29 | 30 | echo Creating CloudFormation stack 31 | aws cloudformation deploy \ 32 | --region ${AWS_REGION} \ 33 | --template-file tmp/app.yaml \ 34 | --stack-name ${STACK_NAME} \ 35 | --capabilities CAPABILITY_IAM \ 36 | --parameter-overrides AwsIoTEndpoint=${AWS_IOT_ENDPOINT} 37 | 38 | echo Fetching identity pool id 39 | AWS_IDENTITY_POOL_ID=`aws cloudformation describe-stacks --region ${AWS_REGION} --stack-name ${STACK_NAME} | grep -A 1 '"OutputKey": "IdentityPoolId"' | perl -lne 'print $1 if /"OutputValue": "([^"]+)"/'` 40 | 41 | echo Patching AWS settings into index.js 42 | sed -e "s//${AWS_REGION}/g" \ 43 | -e "s//${AWS_IDENTITY_POOL_ID}/g" \ 44 | -e "s//${AWS_IOT_ENDPOINT}/g" \ 45 | < www/index.js > tmp/index.js 46 | 47 | echo Uploading static website files 48 | aws s3 cp tmp/index.js s3://${S3_BUCKET} --region ${AWS_REGION} --acl public-read-write 49 | aws s3 cp www/index.html s3://${S3_BUCKET} --region ${AWS_REGION} --acl public-read-write 50 | aws s3 cp www/custom.css s3://${S3_BUCKET} --region ${AWS_REGION} --acl public-read-write 51 | # Setting the error document to index.html is a hack to make /myroom load the chat application. 52 | aws s3 website s3://${S3_BUCKET} --region ${AWS_REGION} --index-document index.html --error-document index.html 53 | 54 | echo Visit http://${S3_BUCKET}.s3-website-${AWS_REGION}.amazonaws.com 55 | 56 | rm tmp/* 57 | -------------------------------------------------------------------------------- /fn/index.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | console.log('Loading function'); 4 | 5 | const APP_NAME = 'chat'; 6 | const DB_TABLE = 'chat'; 7 | const WINDOW_TITLE = 'Chat'; 8 | const AWS_IOT_ENDPOINT = process.env.AWS_IOT_ENDPOINT; 9 | 10 | const AWS = require('aws-sdk'); 11 | const iotdata = new AWS.IotData({endpoint: AWS_IOT_ENDPOINT}); 12 | const dynamodb = new AWS.DynamoDB.DocumentClient(); 13 | 14 | const htmlPage = ` 15 | 16 | 17 | 18 | Babel Chat 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
%CONTENT%
31 | 32 | 33 | 34 | `; 35 | 36 | const htmlContent = ` 37 |
38 |
39 |
40 |
41 |
42 | Translate to: 43 | 55 |
56 |
57 |
58 |
59 | 60 |
61 |
62 | 63 |
64 |
65 | 66 |
67 |
68 |
69 | 70 | 71 | `; 72 | 73 | exports.handler = (event, context, callback) => { 74 | console.log(event); 75 | 76 | if ('Records' in event) { 77 | event.Records.forEach((record) => { 78 | // Kinesis data is base64 encoded so decode here 79 | const payload = new Buffer(record.kinesis.data, 'base64').toString('ascii'); 80 | console.log('Decoded payload:', payload); 81 | routeData(JSON.parse(payload)); 82 | }); 83 | callback(null, `Successfully processed ${event.Records.length} records.`); 84 | } else if ('httpMethod' in event) { 85 | processHttpRequest(event, callback); 86 | } else { 87 | routeData(event); 88 | } 89 | }; 90 | 91 | function routeData(data) { 92 | if ('eventType' in data) { 93 | console.log(data.eventType + ': ' + data.clientId); 94 | } else if ('connected' in data && data.connected === true) { 95 | clientConnected(data); 96 | } else if ('sendroom' in data) { 97 | sendAllMessages(data); 98 | } else { 99 | console.log('ignored: ' + data); 100 | } 101 | } 102 | 103 | function sendAllMessages(inputData) { 104 | var params = { 105 | TableName: DB_TABLE, 106 | KeyConditionExpression: 'room = :hkey', 107 | ExpressionAttributeValues: { 108 | ':hkey': inputData.sendroom 109 | } 110 | } 111 | 112 | dynamodb.query(params, function(err, data) { 113 | if (err) console.log(err); 114 | else { 115 | console.log(data); 116 | var clientTopic = APP_NAME + "/in/" + inputData.clientId; 117 | 118 | var messages = []; 119 | data.Items.forEach((item) => { 120 | messages.push(item.message); 121 | }); 122 | 123 | function run(message) { 124 | store.messages = store.messages.concat(message.messages); 125 | store.renderMessages(); 126 | } 127 | 128 | var message = { 129 | run: run.toString(), 130 | room: inputData.sendroom, 131 | messages: messages 132 | }; 133 | 134 | sendMessage(clientTopic, message); 135 | } 136 | }); 137 | } 138 | 139 | function clientConnected(data) { 140 | 141 | var clientTopic = APP_NAME + "/in/" + data.clientId; 142 | 143 | function run(message) { 144 | store.messages = message.messages; 145 | store.room = message.room; 146 | store.windowTitle = message.windowTitle; 147 | var pubTopic = APP_NAME + "/pub" + store.room; 148 | console.log('subscribe: ' + pubTopic); 149 | client.subscribe(pubTopic); 150 | 151 | document.getElementById('container').innerHTML = message.htmlContent; 152 | 153 | store.replaceURLWithHTMLLinks = function(text) { 154 | var exp = /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig; 155 | return text.replace(exp,"$1"); 156 | } 157 | store.htmlEntities = function(str) { 158 | return String(str).replace(/&/g, '&').replace(//g, '>').replace(/"/g, '"'); 159 | } 160 | store.renderMessages = function() { 161 | var html = ''; 162 | store.messages.forEach((m) => { 163 | console.log(m); 164 | var displayText = store.replaceURLWithHTMLLinks(store.htmlEntities(m.text)); 165 | if ('user' in m) { 166 | html += '

' + m.user + ': ' + displayText + '

'; 167 | } else { 168 | html += '

' + displayText + '

'; 169 | } 170 | }); 171 | document.getElementById('messages').innerHTML = html; 172 | }; 173 | store.sendMessage = function(msg) { 174 | var mqttMsg = new Paho.MQTT.Message(JSON.stringify(msg)); 175 | mqttMsg.destinationName = APP_NAME + "/out"; 176 | client.send(mqttMsg); 177 | }; 178 | store.onMessageArrived = function(topic, msg) { 179 | if ('message' in msg) { 180 | store.messages.push(msg.message); 181 | store.renderMessages(); 182 | } 183 | }; 184 | 185 | if (localStorage.getItem(store.room) != null) { 186 | document.getElementById('user').value = JSON.parse(localStorage.getItem(store.room)).user; 187 | } 188 | 189 | var form = document.getElementById('lineForm'); 190 | form.addEventListener('submit', function(evt) { 191 | evt.preventDefault(); 192 | var user = document.getElementById('user'); 193 | var line = document.getElementById('line'); 194 | //var source_language = document.getElementById('source_lang'); 195 | var target_language = document.getElementById('target_lang'); 196 | var timestamp_date = Date.now(); 197 | if (user.value !== '' && line.value !== '') { 198 | localStorage.setItem(store.room, JSON.stringify({ user: user.value })); 199 | store.sendMessage({ room: store.room, message: { user: user.value, text: line.value, source_lang: 'en', timestamp: timestamp_date}}); 200 | line.value = ''; 201 | } 202 | }); 203 | 204 | document.title = store.windowTitle + ' ' + store.room; 205 | 206 | store.renderMessages(); 207 | store.sendMessage({ sendroom: message.room }); 208 | 209 | } 210 | 211 | var message = { 212 | run: run.toString(), 213 | htmlContent: htmlContent, 214 | windowTitle: WINDOW_TITLE, 215 | room: data.path, 216 | messages: [ { text: 'Welcome to chat room ' + data.path } ] 217 | }; 218 | 219 | sendMessage(clientTopic, message); 220 | } 221 | 222 | function sendMessage(topic, message) { 223 | 224 | var params = { 225 | topic: topic, 226 | payload: JSON.stringify(message), 227 | qos: 1 228 | }; 229 | 230 | console.log('publishing to topic: ' + topic); 231 | 232 | iotdata.publish(params, function(err, data) { 233 | if (err) console.log(err, err.stack); // an error occurred 234 | else console.log(data); // successful response 235 | }); 236 | } 237 | 238 | function processHttpRequest(req, callback) { 239 | var response = { 240 | statusCode: 200, 241 | headers: { 242 | "Content-Type": "text/html" 243 | }, 244 | body: htmlPage.replace("%CONTENT%", 245 | '

Loading chat room ' + 246 | req.path + ' ...

' 247 | ) 248 | }; 249 | console.log("response: " + JSON.stringify(response)); 250 | callback(null, response); 251 | } 252 | -------------------------------------------------------------------------------- /iam/cognito.json: -------------------------------------------------------------------------------- 1 | { 2 | "Version": "2012-10-17", 3 | "Statement": [ 4 | { 5 | "Effect": "Allow", 6 | "Action": [ 7 | "iot:Connect" 8 | ], 9 | "Resource": [ 10 | "arn:aws:iot:::client/*" 11 | ] 12 | }, 13 | { 14 | "Effect": "Allow", 15 | "Action": [ 16 | "iot:Publish" 17 | ], 18 | "Resource": [ 19 | "arn:aws:iot:::topic/chat/out", 20 | "arn:aws:iot:::topic/chat/stream" 21 | ] 22 | }, 23 | { 24 | "Effect": "Allow", 25 | "Action": [ 26 | "iot:Subscribe" 27 | ], 28 | "Resource": [ 29 | "arn:aws:iot:::topicfilter/chat/in/${iot:ClientId}", 30 | "arn:aws:iot:::topicfilter/chat/pub/*" 31 | ] 32 | }, 33 | { 34 | "Effect": "Allow", 35 | "Action": [ 36 | "iot:Receive" 37 | ], 38 | "Resource": [ 39 | "arn:aws:iot:::topic/chat/in/${iot:ClientId}", 40 | "arn:aws:iot:::topic/chat/pub/*" 41 | ] 42 | } 43 | ] 44 | } 45 | -------------------------------------------------------------------------------- /iam/fn.json: -------------------------------------------------------------------------------- 1 | { 2 | "Version": "2012-10-17", 3 | "Statement": [ 4 | { 5 | "Effect": "Allow", 6 | "Action": [ 7 | "iot:Connect" 8 | ], 9 | "Resource": [ 10 | "*" 11 | ] 12 | }, 13 | { 14 | "Effect": "Allow", 15 | "Action": [ 16 | "iot:Publish" 17 | ], 18 | "Resource": [ 19 | "arn:aws:iot:::topic/chat/in/*", 20 | "arn:aws:iot:::topic/chat/pub/*" 21 | ] 22 | }, 23 | { 24 | "Sid": "Stmt1500489818000", 25 | "Effect": "Allow", 26 | "Action": [ 27 | "dynamodb:Query" 28 | ], 29 | "Resource": [ 30 | "arn:aws:dynamodb:::table/chat" 31 | ] 32 | }, 33 | { 34 | "Effect": "Allow", 35 | "Action": [ 36 | "kinesis:DescribeStream", 37 | "kinesis:GetShardIterator", 38 | "kinesis:GetRecords", 39 | "kinesis:ListStreams" 40 | ], 41 | "Resource": [ 42 | "arn:aws:kinesis:::stream/chat" 43 | ] 44 | } 45 | ] 46 | } 47 | -------------------------------------------------------------------------------- /iot/rules.txt: -------------------------------------------------------------------------------- 1 | for r in $(aws iot list-topic-rules |grep -i chat|grep ruleName|cut -c 26-|sed 's/.$//'); do aws iot get-topic-rule --rule-name $r; done > rules.txt 2 | 3 | { 4 | "ruleArn": "arn:aws:iot:::rule/chatStreamRule", 5 | "rule": { 6 | "awsIotSqlVersion": "2016-03-23", 7 | "sql": "SELECT *, clientId() AS clientId, timestamp() AS timestamp FROM 'chat/stream'", 8 | "ruleDisabled": false, 9 | "actions": [ 10 | { 11 | "kinesis": { 12 | "roleArn": "arn:aws:iam:::role/service-role/chatStreamRole", 13 | "streamName": "chat", 14 | "partitionKey": "${topic()}" 15 | } 16 | } 17 | ], 18 | "ruleName": "chatStreamRule" 19 | } 20 | } 21 | { 22 | "ruleArn": "arn:aws:iot:::rule/chatRule", 23 | "rule": { 24 | "awsIotSqlVersion": "2016-03-23", 25 | "sql": "SELECT *, clientId() AS clientId, timestamp() AS timestamp FROM 'chat/out'", 26 | "ruleDisabled": false, 27 | "actions": [ 28 | { 29 | "lambda": { 30 | "functionArn": "arn:aws:lambda:::function:chat" 31 | } 32 | } 33 | ], 34 | "ruleName": "chatRule" 35 | } 36 | } 37 | { 38 | "ruleArn": "arn:aws:iot:::rule/chatPubRule", 39 | "rule": { 40 | "awsIotSqlVersion": "2016-03-23", 41 | "sql": "SELECT *, clientId() AS clientId, timestamp() AS timestamp FROM 'chat/out' WHERE NOT isUndefined(message) AND NOT isUndefined(room)", 42 | "ruleDisabled": false, 43 | "actions": [ 44 | { 45 | "republish": { 46 | "topic": "chat/pub${room}", 47 | "roleArn": "arn:aws:iam:::role/service-role/aws_iot_republish" 48 | } 49 | } 50 | ], 51 | "ruleName": "chatPubRule" 52 | } 53 | } 54 | { 55 | "ruleArn": "arn:aws:iot:::rule/chatPresenceRule", 56 | "rule": { 57 | "awsIotSqlVersion": "2016-03-23", 58 | "sql": "SELECT * FROM '$aws/events/presence/#'", 59 | "ruleDisabled": false, 60 | "actions": [ 61 | { 62 | "lambda": { 63 | "functionArn": "arn:aws:lambda:::function:chat" 64 | } 65 | } 66 | ], 67 | "ruleName": "chatPresenceRule" 68 | } 69 | } 70 | { 71 | "ruleArn": "arn:aws:iot:::rule/chatStore", 72 | "rule": { 73 | "awsIotSqlVersion": "2016-03-23", 74 | "sql": "SELECT *, concat(timestamp, clientId) AS timestamp_clientId, round(timestamp / 1000) + 86400 AS ttl FROM 'chat/pub/#'", 75 | "ruleDisabled": false, 76 | "actions": [ 77 | { 78 | "dynamoDBv2": { 79 | "putItem": { 80 | "tableName": "chat" 81 | }, 82 | "roleArn": "arn:aws:iam:::role/aws_iot_dynamoDB" 83 | } 84 | } 85 | ], 86 | "ruleName": "chatStore" 87 | } 88 | } 89 | -------------------------------------------------------------------------------- /sync_static.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | set -e 3 | 4 | # Before runing this script, open the IoT console to create an endpoint for your account. 5 | 6 | STACK_NAME=${1:?Usage: deploy.sh } 7 | AWS_REGION=${2:?Usage: deploy.sh } 8 | S3_BUCKET=${3:?Usage: deploy.sh } 9 | 10 | mkdir -p tmp 11 | 12 | echo Checking S3 bucket 13 | if ! aws s3 ls s3://${S3_BUCKET} >/dev/null; then 14 | echo Error - bucket ${S3_BUCKET} does not exist 15 | exit 16 | fi 17 | 18 | echo Fetching identity pool id 19 | AWS_IDENTITY_POOL_ID=`aws cloudformation describe-stacks --region ${AWS_REGION} --stack-name ${STACK_NAME} | grep -A 1 '"OutputKey": "IdentityPoolId"' | perl -lne 'print $1 if /"OutputValue": "([^"]+)"/'` 20 | 21 | echo Fetching IoT endpoint URL 22 | AWS_IOT_ENDPOINT=`aws iot describe-endpoint --region eu-west-1 | perl -lne 'print $1 if /"endpointAddress": "([^"]+)"/'` 23 | 24 | echo Patching AWS settings into index.js 25 | sed -e "s//${AWS_REGION}/g" \ 26 | -e "s//${AWS_IDENTITY_POOL_ID}/g" \ 27 | -e "s//${AWS_IOT_ENDPOINT}/g" \ 28 | < www/index.js > tmp/index.js 29 | 30 | echo Uploading static website files 31 | aws s3 cp tmp/index.js s3://${S3_BUCKET} --region ${AWS_REGION} --acl public-read-write 32 | aws s3 cp www/index.html s3://${S3_BUCKET} --region ${AWS_REGION} --acl public-read-write 33 | aws s3 cp www/custom.css s3://${S3_BUCKET} --region ${AWS_REGION} --acl public-read-write 34 | # Setting the error document to index.html is a hack to make /myroom load the chat application. 35 | aws s3 website s3://${S3_BUCKET} --region ${AWS_REGION} --index-document index.html --error-document index.html 36 | 37 | echo Visit http://${S3_BUCKET}.s3-website-${AWS_REGION}.amazonaws.com 38 | 39 | rm tmp/* 40 | -------------------------------------------------------------------------------- /undeploy.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | set -e 3 | 4 | STACK_NAME=${1:?Usage: undeploy.sh } 5 | AWS_REGION=${2:?Usage: undeploy.sh } 6 | 7 | echo Deleting stack 8 | aws cloudformation delete-stack --region ${AWS_REGION} --stack-name ${STACK_NAME} 9 | 10 | echo Waiting for stack to be deleted 11 | while aws cloudformation describe-stacks --region ${AWS_REGION} --stack-name ${STACK_NAME} >/dev/null 2>&1; 12 | do sleep 3; 13 | done 14 | -------------------------------------------------------------------------------- /www/custom.css: -------------------------------------------------------------------------------- 1 | html, 2 | body { 3 | height: 100%; 4 | width: 100%; 5 | font-family: 'Open Sans','Helvetica Neue',Arial,sans-serif; 6 | } 7 | 8 | body { 9 | display: -ms-flexbox; 10 | display: flex; 11 | -ms-flex-align: center; 12 | padding-top: 40px; 13 | padding-bottom: 40px; 14 | background-color: #f5f5f5; 15 | } 16 | 17 | .form-chat { 18 | padding: 15px; 19 | margin: auto; 20 | } 21 | 22 | .form-chat .form-control { 23 | position: relative; 24 | box-sizing: border-box; 25 | height: auto; 26 | padding: 10px; 27 | font-size: 16px; 28 | } 29 | .form-chat .form-control:focus { 30 | z-index: 2; 31 | } 32 | .form-chat input[type="email"] { 33 | margin-bottom: -1px; 34 | border-bottom-right-radius: 0; 35 | border-bottom-left-radius: 0; 36 | } 37 | .form-signin input[type="password"] { 38 | margin-bottom: 10px; 39 | border-top-left-radius: 0; 40 | border-top-right-radius: 0; 41 | } 42 | 43 | .custom-select { 44 | width: auto; 45 | } 46 | 47 | #translateBox { 48 | padding: 10px 0px 10px 15px; 49 | } 50 | 51 | .light { 52 | color: #bbb; 53 | } 54 | 55 | .f-100 { 56 | font-size: 100%; 57 | } 58 | -------------------------------------------------------------------------------- /www/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Babel Chat 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 |
20 |
21 |

Loading Babel Chat...

22 |
23 |
24 |
25 | 26 | 27 | 28 | -------------------------------------------------------------------------------- /www/index.js: -------------------------------------------------------------------------------- 1 | const AWS_REGION = ''; 2 | const AWS_IDENTITY_POOL_ID = ''; 3 | const AWS_IOT_ENDPOINT = ''; 4 | const APP_NAME = 'chat'; 5 | 6 | var store = {}; // To be used for "global" variables 7 | 8 | /** 9 | * utilities to do sigv4 10 | * @class SigV4Utils 11 | */ 12 | function SigV4Utils() {} 13 | 14 | SigV4Utils.getSignatureKey = function(key, date, region, service) { 15 | var kDate = AWS.util.crypto.hmac('AWS4' + key, date, 'buffer'); 16 | var kRegion = AWS.util.crypto.hmac(kDate, region, 'buffer'); 17 | var kService = AWS.util.crypto.hmac(kRegion, service, 'buffer'); 18 | var kCredentials = AWS.util.crypto.hmac(kService, 'aws4_request', 'buffer'); 19 | return kCredentials; 20 | }; 21 | 22 | SigV4Utils.getSignedUrl = function(host, region, credentials) { 23 | var datetime = AWS.util.date.iso8601(new Date()).replace(/[:\-]|\.\d{3}/g, ''); 24 | var date = datetime.substr(0, 8); 25 | 26 | var method = 'GET'; 27 | var protocol = 'wss'; 28 | var uri = '/mqtt'; 29 | var service = 'iotdevicegateway'; 30 | var algorithm = 'AWS4-HMAC-SHA256'; 31 | 32 | var credentialScope = date + '/' + region + '/' + service + '/' + 'aws4_request'; 33 | var canonicalQuerystring = 'X-Amz-Algorithm=' + algorithm; 34 | canonicalQuerystring += '&X-Amz-Credential=' + encodeURIComponent(credentials.accessKeyId + '/' + credentialScope); 35 | canonicalQuerystring += '&X-Amz-Date=' + datetime; 36 | canonicalQuerystring += '&X-Amz-SignedHeaders=host'; 37 | 38 | var canonicalHeaders = 'host:' + host + '\n'; 39 | var payloadHash = AWS.util.crypto.sha256('', 'hex') 40 | var canonicalRequest = method + '\n' + uri + '\n' + canonicalQuerystring + '\n' + canonicalHeaders + '\nhost\n' + payloadHash; 41 | 42 | var stringToSign = algorithm + '\n' + datetime + '\n' + credentialScope + '\n' + AWS.util.crypto.sha256(canonicalRequest, 'hex'); 43 | var signingKey = SigV4Utils.getSignatureKey(credentials.secretAccessKey, date, region, service); 44 | var signature = AWS.util.crypto.hmac(signingKey, stringToSign, 'hex'); 45 | 46 | canonicalQuerystring += '&X-Amz-Signature=' + signature; 47 | if (credentials.sessionToken) { 48 | canonicalQuerystring += '&X-Amz-Security-Token=' + encodeURIComponent(credentials.sessionToken); 49 | } 50 | 51 | var requestUrl = protocol + '://' + host + uri + '?' + canonicalQuerystring; 52 | return requestUrl; 53 | }; 54 | 55 | function initClient(requestUrl, clientId) { 56 | 57 | var client = new Paho.MQTT.Client(requestUrl, clientId); 58 | var connectOptions = { 59 | onSuccess: onConnect, 60 | useSSL: true, 61 | timeout: 3, 62 | mqttVersion: 4, 63 | onFailure: onFailure 64 | }; 65 | // set callback handlers 66 | client.onConnectionLost = onConnectionLost; 67 | client.onMessageArrived = onMessageArrived; 68 | client.connect(connectOptions); 69 | 70 | // called when the client connects 71 | function onConnect() { 72 | // Once a connection has been made, make a subscription and send a message. 73 | console.log("onConnect"); 74 | client.subscribe(APP_NAME + "/in/" + clientId); 75 | var message; 76 | message = new Paho.MQTT.Message(JSON.stringify({ 77 | connected: true, 78 | host: window.location.hostname, 79 | path: window.location.pathname 80 | })); 81 | message.destinationName = APP_NAME + "/out"; 82 | client.send(message); 83 | } 84 | 85 | function onFailure() { 86 | console.log("onFailure"); 87 | } 88 | 89 | // called when the client loses its connection 90 | function onConnectionLost(responseObject) { 91 | if (responseObject.errorCode !== 0) { 92 | console.log("onConnectionLost:" + responseObject.errorMessage); 93 | } else { 94 | console.log("onConnectionLost"); 95 | } 96 | connectClient(); // try to reconnect 97 | } 98 | 99 | // called when a message arrives 100 | function onMessageArrived(message) { 101 | console.log("onMessageArrived:" + message.destinationName + " -> " + message.payloadString); 102 | var payload = JSON.parse(message.payloadString); 103 | if (message.destinationName == APP_NAME + '/in/' + clientId && 'run' in payload) { 104 | // Only eval messages coming from the "in" topic 105 | eval(payload.run); 106 | run(payload); 107 | } 108 | else if ('onMessageArrived' in store) { 109 | translation = translateInput(payload.message.text, payload.message.timestamp); 110 | store.onMessageArrived(message.destinationName, payload); 111 | } else { 112 | console.log('ignored: ' + message.destinationName + " -> " + message.payloadString); 113 | } 114 | } 115 | 116 | } 117 | 118 | function connectClient() { 119 | AWS.config.credentials.get(function(err) { 120 | if (err) { 121 | console.log(err); 122 | return; 123 | } 124 | // var clientId = AWS.config.credentials.identityId; 125 | var clientId = String(Math.random()).replace('.', ''); 126 | console.log('clientId: ' + clientId); 127 | var requestUrl = SigV4Utils.getSignedUrl( 128 | AWS_IOT_ENDPOINT, AWS.config.region, AWS.config.credentials); 129 | initClient(requestUrl, clientId); 130 | }); 131 | } 132 | 133 | function translateInput(text, id) { 134 | //var source_language = document.getElementById('source_lang'); 135 | var source_language = 'auto' 136 | var target_language = document.getElementById('target_lang'); 137 | var target_language = target_language.options[target_language.selectedIndex].value 138 | var translate = new AWS.Translate(); 139 | var params = { 140 | SourceLanguageCode: source_language, 141 | TargetLanguageCode: target_language, 142 | Text: text 143 | }; 144 | translate.translateText(params, function (err, data) { 145 | if (err) { 146 | console.log(err, err.stack); 147 | textBox = document.getElementById(id); 148 | textBox.classList.add('badge'); 149 | textBox.classList.add('badge-warning'); 150 | textBox.classList.add('f-100'); 151 | textBox.innerText = textBox.innerText + ' (Translate Error)' 152 | } 153 | else { 154 | console.log(data); 155 | var storeText = {sourceLanguage: data.SourceLanguageCode, sourceText: text, targetLanguage: target_language, translatedText: data.TranslatedText} 156 | localStorage.setItem('translatesCache.' + id, JSON.stringify(storeText)); 157 | $.each(localStorage, function(key, value){ 158 | if (key.substring(0,15) == 'translatesCache') { 159 | values = JSON.parse(value); 160 | strId = key.substring(16); 161 | textBox = document.getElementById(strId); 162 | if (values['sourceLanguage'] != values['targetLanguage']) textBox.innerHTML = values['translatedText'] + ' (' + textBox.innerText + ')'; 163 | } 164 | }); 165 | } 166 | callScroll(); 167 | }); 168 | } 169 | 170 | function callScroll() { 171 | $('#messages').scrollTop($('#messages')[0].scrollHeight - $('#messages')[0].clientHeight); 172 | } 173 | 174 | function init() { 175 | 176 | // Initialize the Amazon Cognito credentials provider 177 | 178 | AWS.config.region = AWS_REGION; // Region 179 | AWS.config.credentials = new AWS.CognitoIdentityCredentials({ 180 | IdentityPoolId: AWS_IDENTITY_POOL_ID, 181 | }); 182 | var userName = localStorage[window.location.pathname]; 183 | localStorage.clear(); 184 | if (userName) localStorage[window.location.pathname] = userName; 185 | connectClient(); 186 | 187 | } 188 | 189 | init(); 190 | --------------------------------------------------------------------------------