FTP
Mock 553 File Name Not Allowed Response
Requested action not taken. File name not allowed. The file or directory name violates the server's naming rules or filesystem restrictions.
View full reference →1 HTTP Response
HTTP/1.1 553 File Name Not Allowed
Content-Type: application/json
Date: Tue, 25 Feb 2026 12:00:00 GMT
Content-Length: 61
{
"error": "server_error",
"message": "File Name Not Allowed"
}
2 Test with curl
curl -i https://httpbin.org/status/553
3 Return 553 File Name Not Allowed in Your Framework
django
from django.http import JsonResponse
def my_view(request):
return JsonResponse(
{"error": "server_error", "message": "File Name Not Allowed"},
status=553,
)
flask
from flask import Flask, jsonify
app = Flask(__name__)
@app.route("/endpoint")
def my_endpoint():
return jsonify({"error": "server_error", "message": "File Name Not Allowed"}), 553
fastapi
from fastapi import FastAPI
from fastapi.responses import JSONResponse
app = FastAPI()
@app.get("/endpoint")
def my_endpoint():
return JSONResponse(
content={"error": "server_error", "message": "File Name Not Allowed"},
status_code=553,
)
express.js
// Express.js
app.get('/endpoint', (req, res) => {
res.status(553).json({"error": "server_error", "message": "File Name Not Allowed"});
});
spring boot
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.util.Map;
@RestController
public class MyController {
@GetMapping("/endpoint")
public ResponseEntity<Map<String, Object>> myEndpoint() {
return ResponseEntity
.status(553)
.body(Map.of("error", "file_name_not_allowed",
"message", "File Name Not Allowed"));
}
}
go net/http
package main
import (
"encoding/json"
"net/http"
)
func myHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(553)
json.NewEncoder(w).Encode(map[string]string{
"error": "file_name_not_allowed",
"message": "File Name Not Allowed",
})
}
ruby on rails
class MyController < ApplicationController
def my_action
render json: {"error": "server_error", "message": "File Name Not Allowed"},
status: :file_name_not_allowed
end
end
asp.net core
// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
Results.Json(
new { error = "file_name_not_allowed", message = "File Name Not Allowed" },
statusCode: 553
)
);