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<\/a><\/p>\nArtificial Intelligence > Amazon Polly (was just “Polly”)<\/p>\n
Create a DynamoDB table<\/p>\n
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- New Table: posts<\/li>\n
- Partition Key: id<\/li>\n<\/ul>\n
Setup S3<\/p>\n
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- Create 2 buckets.\n
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- One for the website (enable static web hosting)<\/li>\n
- One for the files.\u00a0 (Why shouldn’t this be the same?)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Setup Messenging<\/p>\n
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- Messaging > Simple Notification Service<\/li>\n
- Create a topic\n
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- Name: new_posts<\/li>\n
- Display Name: New Posts<\/li>\n
- [Create topic]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Create a Role for the Lambda functions<\/p>\n
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- Security, Identity & Complience > IAM > Roles > [Create role]<\/li>\n
- Select type of role\n
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- AWS Service > Lambda<\/li>\n
- [Next: Permissions]<\/li>\n<\/ul>\n<\/li>\n
- Attach Policy\n
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- Will create a custom role, so we’ll skip this for now.<\/li>\n
- [Next: Review]<\/li>\n<\/ul>\n<\/li>\n
- Review\n
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- Role Name: LambdaPostsReaderRole<\/li>\n
- Role Description: Allows Lambda Function to call AWS services on your behalf<\/li>\n
- [Create role]<\/li>\n<\/ul>\n<\/li>\n
- Assign the policies\n
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- IAM > Roles > LambdaPostsReaderRole<\/li>\n
- “Permissions” tab > Inline Policies > + Add inline policy<\/li>\n<\/ul>\n<\/li>\n
- Set Permissions\n
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- (*) Custom Policy<\/li>\n
- [Select]<\/li>\n<\/ul>\n<\/li>\n
- Review Policy\n
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- Policy Name: LambdaPolicy<\/li>\n
- Policy Document: Paste the code found lambdapolicy.json<\/a>.<\/li>\n
- [Validate Policy] to see if there are any errors (There is on the video)<\/li>\n
- [Apply Policy]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Create Lambda Functions<\/h3>\n
Write text to the DynamoDB Table<\/p>\n
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- Compute > Lambda > [Create a function]<\/li>\n
- Select Blueprint\n
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- [Author from scratch]<\/li>\n<\/ul>\n<\/li>\n
- Configure Triggers\n
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- No triggers<\/li>\n
- [Next]<\/li>\n<\/ul>\n<\/li>\n
- Configure Function\n
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- Name: PostReader_NewPosts<\/li>\n
- Description: Lambda function for new posts<\/li>\n
- Runtime: Python 2.7<\/li>\n
- Lambda function code\n
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- Insert the code located here: newposts.py<\/a><\/li>\n
- Environmental Variables (You can see these in the code.)\n
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- DB_TABLE_NAME = posts<\/li>\n
- SNS_TOPIC = Get the ARN value for the new_posts topic\n
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- arn:aws:sns:us-east-2:727545344356:new_posts<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- Lambda function handler and role\n
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- Handler: lambda_function.lambda_handler\n
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- This is not explained in the video.<\/li>\n
- Mine defaulted to index.handler, so I changed it to match his.<\/li>\n<\/ul>\n<\/li>\n
- Role: Choose and existing role<\/li>\n
- Existing role: LambdaPostsReaderRole<\/li>\n
- [Next]<\/li>\n<\/ul>\n<\/li>\n
- Review\n
- \n
- [Create function]<\/li>\n<\/ul>\n<\/li>\n
- Test\n
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- “voice”: “Joanna”<\/li>\n
- “text”: “This is working!”<\/li>\n
- – Success!<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Create Polly Service<\/p>\n
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- Lambda > Functions > [Create function] > [Author from scratch]<\/li>\n
- Configure triggers\n
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- Select SNS<\/li>\n
- Topic = new_posts<\/li>\n
- [x] Enable trigger<\/li>\n
- [Next]<\/li>\n<\/ul>\n<\/li>\n
- Configure function\n
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- Name: PostReader_ConvertToAudio<\/li>\n
- Description: Convert our posts to audio<\/li>\n
- Runtime: Python 2.7<\/li>\n
- Advanced settings\n
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- timeout: 5 minutes 0 seconds (might take a while to convert a lot of text!)<\/li>\n<\/ul>\n<\/li>\n
- Code: Insert code found here: convertoaudio.py<\/a><\/li>\n
- Environmental Variables\n
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- DB_TABLE_NAME = posts<\/li>\n
- BUCKET_NAME = your_bucket_name (s3.thomasandsofia.com)<\/li>\n<\/ul>\n<\/li>\n
- Handler: lambda_function.lambda_handler<\/li>\n
- Role: Choose and existing role<\/li>\n
- Existing role: LambdaPostsReaderRole<\/li>\n
- [Next]<\/li>\n<\/ul>\n<\/li>\n
- Review\n
- \n
- [Create function]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Get Posts from DynamoDB<\/p>\n
(might explain why I didn’t understand some of the code….)<\/p>\n
- \n
- Lambda > Functions > [Create function] > [Author from scratch]<\/li>\n
- Configure triggers\n
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- Will be triggered by API Gateway, so leave blank<\/li>\n
- [Next]<\/li>\n<\/ul>\n<\/li>\n
- Configure function\n
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- Name: PostReader_GetPosts<\/li>\n
- Desc: PostReader_GetPosts<\/li>\n
- Runtime: Python 2.7<\/li>\n
- Code: Insert code found here: getposts.py<\/a><\/li>\n
- Environmental Variables\n
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- DB_TABLE_NAME = posts<\/li>\n
- BUCKET_NAME = your_bucket_name (s3.thomasandsofia.com)<\/li>\n<\/ul>\n<\/li>\n
- Handler: lambda_function.lambda_handler<\/li>\n
- Role: Choose and existing role<\/li>\n
- Existing role: LambdaPostsReaderRole<\/li>\n
- [Next]<\/li>\n<\/ul>\n<\/li>\n
- Review\n
- \n
- [Create function]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Configure API Gateway<\/p>\n
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- Application Services > API Gateway<\/li>\n
- Create new API\n
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- (*) New API<\/li>\n
- Name and description\n
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- API name: PostReaderAPI<\/li>\n
- Description: API to read my posts<\/li>\n<\/ul>\n<\/li>\n
- [Create API]<\/li>\n<\/ul>\n<\/li>\n
- Resources – Actions > Create Method\n
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- Blank dropdown: POST<\/li>\n
- Click the Checkmark Icon<\/li>\n
- – POST – Setup\n
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- Integration type: (*) Lambda Function<\/li>\n
- Use Lambda Proxy integration [ ] (do not check)<\/li>\n
- Lambda Region: Select your region (us-east-2)<\/li>\n
- Lambda Function: click in box, type a character and select ‘PostReader_NewPost’<\/li>\n<\/ul>\n
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- [Save]<\/li>\n
- “Add Permission to Lambda Function”\n
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- [OK]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- Resources – Actions > Create Method\n
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- Blank dropdown: GET<\/li>\n
- Click the Checkmark Icon<\/li>\n
- – POST – Setup\n
- \n
- Integration type: (*) Lambda Function<\/li>\n
- Use Lambda Proxy integration [ ] (do not check)<\/li>\n
- Lambda Region: Select your region (us-east-2)<\/li>\n
- Lambda Function: click in box, type a character and select ‘PostReader_GetPost’<\/li>\n<\/ul>\n
- \n
- [Save]<\/li>\n
- “Add Permission to Lambda Function”\n
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- [OK]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- “Cross Origin Resource Sharing” aka CORS\n
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- Resources – Actions > Enable CORS<\/li>\n
- Enable CORS\n
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- This enables you to invoke your API from a website\/domain name that has a different hostname to that API.\u00a0 In this instance, it will be our S3 bucket.<\/li>\n
- Methods: [x]POST [X]GET [x]Options<\/li>\n
- [Enable CORS and replace existing CORS headers]<\/li>\n
- Confirm method changes\n
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- [Yes, replace existing values]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- Resources > click ‘GET’ > Method Request<\/li>\n
- – GET – Method Request > URL Query String Parameters<\/li>\n
- + Add query string\n
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- Name: postId (Case sensitive!)<\/li>\n
- Click the Checkmark Icon<\/li>\n<\/ul>\n<\/li>\n
- Resources > click ‘GET’ > Integration Request<\/li>\n
- – GET – Method Request > Body Mapping Templates<\/li>\n
- Request body passthrough\n
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- (*) When there are no templates defined (recommended)<\/li>\n
- + Add mapping template\n
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- Under ‘Content-Type’ (above, I know, strange): application\/json<\/li>\n
- Click Checkmark<\/li>\n
- application\/json code: Paste contents found here: mappings.json<\/a><\/li>\n
- [Save]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- Resource – Actions > Deploy API\n
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- Deployment stage: [New Stage]<\/li>\n
- Stage name: Dev<\/li>\n
- Stage description: Dev<\/li>\n
- Deployment description: Dev<\/li>\n
- [Deploy]<\/li>\n<\/ul>\n<\/li>\n
- dev Stage Editor – Get the URL!!\n
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- Invoke URL:\u00a0 https:\/\/oep9d88gib.execute-api.us-east-2.amazonaws.com\/dev<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Deploy the website<\/p>\n
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- Storage > S3 > Select Bucket > Permissions > Bucket Policy<\/li>\n
- Insert the JSON code found here: bucketpolicypermissions.json<\/a>\n
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- Over-write “arn:aws:s3:::BUCKET_NAME” with the actual ARN of the bucket.\u00a0 This is posted above the code window. arn:aws:s3:::s3.thomasandsofia.com<\/span><\/li>\n
- [Save]<\/li>\n<\/ul>\n<\/li>\n
- Edit scripts.js<\/a>\n
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- Replace YOUR-API-GATEWAY-HERE with the URL you saved from the API gateway.<\/li>\n
- Upload to the bucket<\/li>\n<\/ul>\n<\/li>\n
- Upload index.html<\/a><\/li>\n
- Upload styles.css<\/a><\/li>\n<\/ul>\n
<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Polly is Amazon’s text to speech service. Requires API Gateway and Cross Origin Resource Sharing* Part of the exam! Artificial Intelligence > Amazon Polly (was just “Polly”) Create a DynamoDB table New Table: posts Partition Key: id Setup S3 Create 2 buckets. One for the website (enable static web hosting) One for the files.\u00a0 (Why ..<\/p>\n
- Upload styles.css<\/a><\/li>\n<\/ul>\n
- Over-write “arn:aws:s3:::BUCKET_NAME” with the actual ARN of the bucket.\u00a0 This is posted above the code window. arn:aws:s3:::s3.thomasandsofia.com<\/span><\/li>\n
- Invoke URL:\u00a0 https:\/\/oep9d88gib.execute-api.us-east-2.amazonaws.com\/dev<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
- [Create function]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
- Environmental Variables\n
- [Create function]<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
- Environmental Variables\n
- Handler: lambda_function.lambda_handler\n
- Environmental Variables (You can see these in the code.)\n
- Insert the code located here: newposts.py<\/a><\/li>\n
- Create 2 buckets.\n