Manesh Manesh - 1 month ago 11
Java Question

Spring Rest Web service returning 415

I have Spring web service from the following. JSON for swagger

{
"swagger": "2.0",
"info": {
"version": "1.0.0",
"title": "Extended User Management API",
"description": "This is communicate with an extended user management webservice to test the swagger API for learning"
},
"schemes": [
"http"
],
"basePath": "/UserManagement/rest/UserService",
"host": "127.0.0.1:8089",
"produces": [
"application/json"
],
"consumes": [
"application/json"
],
"paths": {
"/users": {
"get": {
"responses": {
"200": {
"description": "An array of users",
"schema": {
"type": "array",
"items": {
"$ref": "#/definitions/User"
}
}
},
"default": {
"description": "Unexpected error",
"schema": {
"$ref": "#/definitions/Error"
}
}
}
}
},
"/addUser": {
"post": {
"summary": "Add an additional user",
"description": "This service is used to add and additional user to the list of users.",
"parameters": [
{
"name": "user_id",
"in": "query",
"description": "Unique id of the user to be added.",
"required": true,
"type": "integer",
"format": "int32"
},
{
"name": "name",
"in": "query",
"description": "Name of the user to be added.",
"required": true,
"type": "string"
},
{
"name": "profession",
"in": "query",
"description": "Profession of the user to be added.",
"required": true,
"type": "string"
}
],
"responses": {
"200": {
"description": "OK"
},
"default": {
"description": "Unexpected error",
"schema": {
"$ref": "#/definitions/Error"
}
}
}
}
}
},
"definitions": {
"User": {
"type": "object",
"properties": {
"user_id": {
"type": "integer",
"format": "int32",
"description": "This is unique id that is assigned to each user."
},
"name": {
"type": "string",
"description": "This is the name of the user"
},
"profession": {
"type": "string",
"description": "This is the profession that the user holds"
}
}
},
"Error": {
"type": "object",
"properties": {
"code": {
"type": "integer",
"format": "int32"
},
"message": {
"type": "string"
},
"fields": {
"type": "string"
}
}
}
}
}


I generated the code and resolved all the error in the project. The I got the application to run in Spring boot main with out any problems. The issue that I'm facing now is that on accessing the get web service "/users", I'm getting an error from the service.
Error produced

I tried debugging the spring application I came to find that the intended service is not even hit. The code for service is given below.
@javax.annotation.Generated(value = "class io.swagger.codegen.languages.SpringCodegen", date = "2016-10-24T09:36:32.738Z")

@Api(value = "users", description = "the users API")
public interface UsersApi {

@ApiOperation(value = "", notes = "", response = User.class, responseContainer = "List", tags={ })
@ApiResponses(value = {
@ApiResponse(code = 200, message = "An array of users", response = User.class),
@ApiResponse(code = 200, message = "Unexpected error", response = User.class) })
@RequestMapping(value = "/users",
produces = { "application/json" },
consumes = { "application/json" },
method = RequestMethod.GET)
ResponseEntity<List<User>> usersGet();

}


Implementation of this interface is given below

@javax.annotation.Generated(value = "class io.swagger.codegen.languages.SpringCodegen", date = "2016-10-24T09:36:32.738Z")
@Controller
public class UsersApiController implements UsersApi {

UserDao udao = new UserDao();

public ResponseEntity<List<User>> usersGet() {
return new ResponseEntity<List<User>>(udao.getAllUsers(), HttpStatus.OK);
}
}


Can please some one tell me what is the mistake that I made so that I can solve this.

Answer

Well you are using an unsupported media type as the exception says. Have a look at your @RequestMapping annotation:

@RequestMapping(value = "/users",
produces = { "application/json" }, 
consumes = { "application/json" },
method = RequestMethod.GET)
ResponseEntity<List<User>> usersGet(); 

Either you remove the consumes key or you support the Content-Type in your GET request.

Edit: maybe it would be a better option to remove the consumes key. I don't think it is a good idea to consume any json in a GET request.