Spring Boot: RestTemplate

When you need to access other APIs from the backend of your Spring Boot Application

Suppose you are in the backend code of your Spring Boot application and you want to access some other API, e.g. the https://developer.ucsb.edu API.

What code can you use?

Here is a tutorial on the REST client built into Spring Boot called RestTemplate:

This one covers the Maven dependencies that need to be in the pom.xml

https://www.baeldung.com/how-to-use-resttemplate-with-basic-authentication-in-spring

Setting Headers

Many APIs (including, for example, https://developer.ucsb.edu) require setting headers.

For example, https://developer.ucsb.edu requires you to set:

accept: application/json
ucsb-api-version: 1.0
ucsb-api-key: value-specific-to-each-api-user

How do you set these headers? This article explains:

https://stackoverflow.com/questions/32623407/add-my-custom-http-header-to-spring-resttemplate-request-extend-resttemplate/32623548

Related topics:

Spring Boot: —A Java web application framework
Spring Boot: Actuator—Checking the endpoint mappings, health or other info about your Spring Boot app
Spring Boot: Application Properties—Defining the application.properties
Spring Boot: ControllerAdvice—A place to factor out common ExceptionHandler, ModelAttribute and InitBinder code across multiple controllers
Spring Boot: CSV—Downloading and Uploading CSV files with Spring Boot
Spring Boot: Database Migrations—When you need to make a change to your database schema for an app in progress
Spring Boot: Heroku—Tips for running with Spring Boot applications on Heroku
Spring Boot: Logging—How to write information to the log in Spring Boot
Spring Boot: OAuth—How to implement OAuth for authentication in Spring Boot
Spring Boot: POST and CSRF—If you get 403 forbidden messages when using POST
Spring Boot: Postgres—Using Spring Boot with Postgres
Spring Boot: RestTemplate—When you need to access other APIs from the backend of your Spring Boot Application
Spring Boot: Secrets—Ways of keepings database credentials and OAuth client secrets out of Github
Spring Boot: Security—Authentication, Authorization and other Security issues
Spring Boot: Sessions—How to make the stateless HTTP protocol stateful
Spring Boot: SQL—Working with SQL and Databases in Spring Boot
Spring Boot: VS Code—Suggested VS Code extensions for working with Spring Boot