We often get HTTP/1.1 415 status code for server error Unsupported Media Type. This error occurs when any HTTP client sends the wrong Content-Type.
When using CURL or any other HTTP client tool to invoke REST API with POST or PUT, the default content type is application/x-www-form-urlencoded or multipart/form-data which is wrong if the server is expecting another content type like application/json or something else.
For the example here is Spring Rest Controller method
@ApiOperation(value = "Add new email and company for 2F authentication",response = TotpResource.class)
@PostMapping(consumes = "application/json", produces = "application/json")
public ResponseEntity<TotpResource> addNew(@Valid @RequestBody TotpResource totpResource) {
totpResource = this.totpService.addNew(totpResource);
return ResponseEntity.created(URI.create("/" + totpResource.getEmailId())).body(totpResource);
}
In this case, the expected correct headers would be
Accept: application/json"
Content-Type: application/json
For calling the above API we need to use the following CURL command
curl --header "Content-Type: application/json" \
--header "Accept: application/json" \
--request POST \
--data '{...}' \
http://localhost:8080/api/totp
You should check CURL options documentation for more details curl man page (mit.edu)