415 Unsupported Media Type

[xuanswe]

Describe the bug
Execute all operations, get the same error message:

{
  "timestamp": "2020-02-27T22:00:18.456+0000",
  "status": 415,
  "error": "Unsupported Media Type",
  "message": "Content type '' not supported",
  "path": "/api/todos"
}

To Reproduce
Steps to reproduce the behavior:

• Spring boot 2.2.4.RELEASE
• Gradle (Kotlin DSL): implementation("org.springdoc:springdoc-openapi-ui:1.2.32")
• Kotlin JVM version 1.3.61
• Redhat OpenJDK 11.0.3

@RestController
@RequestMapping(
    path = ["/api/todos"],
    consumes = [MediaType.APPLICATION_JSON_VALUE],
    produces = [MediaType.APPLICATION_JSON_VALUE]
)
@Tag(name = "Todo", description = "Todo API")
class TodoRestController {
    @GetMapping
    fun getTodos(@RequestParam("id", required = false) ids: Array<Int>?): ResponseEntity<List<Todo>> {
        //...
    }
}

Expected behavior
Content-Type header should be the same as configured in @RequestMapping(consumes = "...").

Screenshots

[xuanswe]

It seems that springfox-swagger2 also has the same problem.
springfox/springfox#2036

[bnasslahsen]

@nguyenxndaidev,

This is related to OpenAPI Specification, even its allowed in spring.
You can have a look at the following thread:

• Clarify when consumes/produces take effect OAI/OpenAPI-Specification#581