Spring Cloud Config Parameter of type Map with some symbols (dot ., slash / and etc) in key is not supported

Property key with square bracket is not support. Config server responses with HTTP error code 400, "error": "Bad Request". But such properties is supported by Spring Boot.

Spring Boot documentation https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-Configuration-Binding For YAML files, the brackets need to be surrounded by quotes for the key to be parsed properly.

foo:
  nested:
    "[bar.baz]":
      bling: 2

Or another documentation: https://docs.spring.io/spring-boot/docs/2.7.6/reference/pdf/spring-boot-reference.pdf s. 96

For example, consider binding the following properties to a Map<String,String>: Yaml

my:
  map:
  "[/key1]": "value1"
  "[/key2]": "value2"
  "/key3": "value3"

NOTE For YAML files, the brackets need to be surrounded by quotes for the keys to be parsed properly. The properties above will bind to a Map with /key1, /key2 and key3 as the keys in the map. The slash has been removed from key3 because it was not surrounded by square brackets.

Sample Config file: example.yml

foo:
  nested:
    "[bar.baz]":
      bling: 2
my:
  map:
  "[/key1]": "value1"
  "[/key2]": "value2"
  "/key3": "value3"

curl localhost:8888/example-default.yml

400 error code is returned

Comment From: woshikid

As in my test with config file:

my:
  map:
  "[/key1]": "value1"
  "[/key2]": "value2"
  "/key3": "value3"

curl localhost:8888/example/default works fine curl localhost:8888/example-default.yml 500 errors (class java.util.LinkedHashMap cannot be cast to class java.util.List)