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A Software Engineer with more than 7 years of experience.

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https://www.linkedin.com/in/harsha-jayamanna-26996827/
https://github.com/h-hub
https://stackoverflow.com/users/2184946/harshakj89
https://twitter.com/HarshaJayamanna

Email: harsha.kj89[at]gmail[dot]com

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Web Server vs Application Server

What is a Sever? Server is a Computer that provides data to another Computer. Computer that provides data can be named as the server and the computer that requests data can be named as the client. Internet consists a network of servers and clients or We can say Internet consists People, Computers and other devices. Software is the factor which turns a computer into a Server. Normal Desktop Computers can be turned into a Server by installing specific software and configuring them. There are several types of servers and the installed software depends on the purpose or the type of the server. Below are several types of servers. File server Print server Communications server Application server Database server Domain server Web server Examples :Examples for Web Server are Apache HTTP Server and Microsoft IIS. Examples for Mail Servers are Exim and iMail. Examples for File Server are Samba and Linux Network File System. Example for Application Server are JBoss,

Use Spring Resource Server with AWS Cognito

What is the resource server? The resource server is the OAuth 2.0 term for your API server. For example, In your company, you might have servers such as user details server, invoices server, and order server. These servers implement the use cases of your business. These resource servers can be secured using AWS Cognito. First, the application obtains the access token from Cognito Then, the token will be included in the request header. Finally, you can call the resource server Access server-side resources How to implement it? You can use Spring boot to develop resource servers. Dependencies Spring boot: 2.4.0-M1 OpenJDK 11 Step 1 Add spring-security-oauth2-resource-server as a dependency and set jwk-set-uri and issuer-uri to your properties file. Get jwk-set-uri and issuer-uri values from AWS Cognito Console. Get the user pool id from the user pool and construct the URLs using that values and the region. User pool Step 2 Configure Spring security. "/statu

Upload files to AWS S3 using Java, Spring Boot, and Angular

In this post, I have explained how to securely upload files(Images) to AWS S3 using Spring boot and Angular. This application is secured using AWS Cognito. Even though I'm going to explain how to secure the application using AWS Cognito, Below blog posts contain more details. Please check those too. Use Spring Resource Server with AWS Cognito Secure APIs and Access AWS Resources with Angular and Cognito Securing the Application In order to secure your Spring boot application, we can use the Spring boot oauth2 resource server. To use the resource server with AWS Cognito, you have to configure the application by putting spring.security.oauth2.resourceserver.jwt.issuer-uri and spring.security.oauth2.resourceserver.jwt.jwk-set-uri in the application.properties file. To integrate the secured Spring boot application with the Angular application, we need to configure the Angular application by including a configuration file which contains the Cognito user pool and identity pool values

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