DNS
Giả lập phản hồi 21 BADALG
Algorithm not supported. The cryptographic algorithm specified in the TKEY or SIG record is not supported by the server.
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HTTP/1.1 21 BADALG
Content-Type: application/json
Date: Tue, 25 Feb 2026 12:00:00 GMT
Content-Length: 21
{
"status": "success"
}
2 Kiểm tra với curl
curl -i https://httpbin.org/status/21
3 Trả về 21 BADALG trong Framework của bạn
django
from django.http import JsonResponse
def my_view(request):
return JsonResponse(
{"status": "success"},
status=21,
)
flask
from flask import Flask, jsonify
app = Flask(__name__)
@app.route("/endpoint")
def my_endpoint():
return jsonify({"status": "success"}), 21
fastapi
from fastapi import FastAPI
from fastapi.responses import JSONResponse
app = FastAPI()
@app.get("/endpoint")
def my_endpoint():
return JSONResponse(
content={"status": "success"},
status_code=21,
)
express.js
// Express.js
app.get('/endpoint', (req, res) => {
res.status(21).json({"status": "success"});
});
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(21)
.body(Map.of("error", "badalg",
"message", "BADALG"));
}
}
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(21)
json.NewEncoder(w).Encode(map[string]string{
"error": "badalg",
"message": "BADALG",
})
}
ruby on rails
class MyController < ApplicationController
def my_action
render json: {"status": "success"},
status: :badalg
end
end
asp.net core
// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
Results.Json(
new { error = "badalg", message = "BADALG" },
statusCode: 21
)
);