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Creating Product Microservices Serverless CRUD REST API

Pragya Keshap answered on February 13, 2023 Popularity 1/10 Helpfulness 1/10

answer Creating Product Microservices Serverless CRUD REST API

Creating Product Microservices Serverless CRUD REST API

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We will create a Lambda function for the backend of your API. This Lambda function creates, reads, updates, and deletes items. The function uses events from API Gateway to determine how to perform crud operations.

Goto Console — Lambda — Choose Create function. — For Function name, enter productFunction — Choose Create function.

The example function returns a 200 response to clients, and the text Hello from Lambda. The default Lambda function code should look similar to the following: And please add logging line of code:

exports.handler = async (event) => {
 console.log(“event:”, JSON.stringify(event, undefined, 2));
let body;
 
 try {
 switch (event.httpMethod) {
 case “GET”:
 if(event.queryStringParameters != null) { 
 body = `Processing Get Product Id with “${event.pathParameters.id}” and Category with “${event.queryStringParameters.category}” `; // GET product/1234?category=Phone
 }
 else if (event.pathParameters != null) {
 body = `Processing Get Product Id with “${event.pathParameters.id}”`; // GET product/1234
 } else {
 body = `Processing Get All Products`; // GET product
 }
 break; 
 case “POST”:
 let payload = JSON.parse(event.body);
 body = `Processing Post Product with “${payload}”`; // POST /product
 break;
 case “DELETE”:
 if(event.pathParameters != null) {
 body = `Processing Delete Product Id with “${event.pathParameters.id}”`; // DELETE product/1234
 }
 break;
 default:
 throw new Error(`Unsupported route: “${event.httpMethod}”`);
 }
console.log(body);
 return {
 statusCode: 200,
 body: JSON.stringify({
 message: `Successfully finished operation: “${event.httpMethod}”`,
 body: body
 })
 };
} catch (e) {
 console.error(e);
 return {
 statusCode: 400,
 body: JSON.stringify({
 message: “Failed to perform operation.”,
 errorMsg: e.message 
 })
 };
 }
};
Basi

https://medium.com/aws-lambda-serverless-developer-guide-with-hands/amazon-api-gateway-build-crud-microservice-with-rest-api-and-lambda-cd7e9230a1f2

Popularity 1/10 Helpfulness 1/10 Language typescript

Source: Grepper

Tags: api crud microservices product rest serverless typescript

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Contributed on Feb 13 2023

Pragya Keshap

0 Answers Avg Quality 2/10

Creating Product Microservices Serverless CRUD REST API

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