BadRequest - Send and encode an invalid input problem.

DecodeStruct -- Decode a struct from JSON, XML or Protobuf.

Forbidden -- Send a ForbiddenResponse as JSON or XML.

InternalServerError -- Send an InternalServerErrorResponse as JSON or XML.

NewProblem -- Create a new Problem.

NoContent -- Send a no content response as JSON or XML.

NotFound -- Send a NotFoundResponse as JSON or XML.

SendStruct -- Send a struct as JSON, XML or Protobuf.

StructOK -- Send a struct as a success response.

Success -- Send a success response as JSON or XML.

Unauthorized -- Send an UnauthorizedResponse as JSON or XML.

ProtoEncoder -- Interface for encoding a struct as a protobuf message Useful for complex types that don't conform to auto-generated protobuf structs.