[TECH-DEBT] - Handle multivalue support for www urlencoded header

This is a tech-debt ticket. Before implementing, please check if the framework(Apache Http Client) is already taking care of this situation. If not, then implement it and raise a PR. TODO-

• Add an end point or use the existing end point in the Spring Boot demo repo to reproduce this
  • See the relevant repo/class in the below section
• Add a simple brand new test-case with couple of Key-Values to the above repo
• Please take care of "body" and "queryParams" while fixing the same.
  • The fix is similar for both. You might reuse the same code.

Spring boot repo: https://github.com/authorjapps/spring-boot-integration-test

Controller class: https://github.com/authorjapps/spring-boot-integration-test/blob/master/src/main/java/com/springboot/controller/CustomerController.java

Relevant comments from the old ticket: Comment Link: https://github.com/authorjapps/zerocode/issues/141#issuecomment-432700435

That sounds correct. 👍 This will make everyone's life a lot easy now. Postman accepts both as key-value and combines them if both are present(shown below).

Folks, Let's go with PR review n approval please !

• Then in server app-

If same key is present, they server receives as multivalue(means client also sends as multi value) - see below:

• postman client

• spring boot server

@arunvelusamyd , Good job mate ! Have you taken care of the above(same key situation) in your PR ? If not can you please take care now ? 👍

@macrocks , @cooljavadev @nirmalchandra - Please review n approve -or- express your view points if disagree or think any other way 🙏