HTTP
Simuler une réponse 422 Unprocessable Content
The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
Voir la référence complète →1 Réponse HTTP
HTTP/1.1 422 Unprocessable Content
Content-Type: application/json
Date: Tue, 25 Feb 2026 12:00:00 GMT
Content-Length: 90
{
"error": "validation_error",
"errors": [
{
"field": "email",
"message": "Invalid format"
}
]
}
2 Tester avec curl
curl -i https://httpbin.org/status/422
3 Retourner 422 Unprocessable Content dans votre framework
django
from django.http import JsonResponse
def my_view(request):
return JsonResponse(
{"error": "validation_error", "errors": [{"field": "email", "message": "Invalid format"}]},
status=422,
)
flask
from flask import Flask, jsonify
app = Flask(__name__)
@app.route("/endpoint")
def my_endpoint():
return jsonify({"error": "validation_error", "errors": [{"field": "email", "message": "Invalid format"}]}), 422
fastapi
from fastapi import FastAPI
from fastapi.responses import JSONResponse
app = FastAPI()
@app.get("/endpoint")
def my_endpoint():
return JSONResponse(
content={"error": "validation_error", "errors": [{"field": "email", "message": "Invalid format"}]},
status_code=422,
)
express.js
// Express.js
app.get('/endpoint', (req, res) => {
res.status(422).json({"error": "validation_error", "errors": [{"field": "email", "message": "Invalid format"}]});
});
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(422)
.body(Map.of("error", "unprocessable_content",
"message", "Unprocessable Content"));
}
}
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(422)
json.NewEncoder(w).Encode(map[string]string{
"error": "unprocessable_content",
"message": "Unprocessable Content",
})
}
ruby on rails
class MyController < ApplicationController
def my_action
render json: {"error": "validation_error", "errors": [{"field": "email", "message": "Invalid format"}]},
status: :unprocessable_content
end
end
asp.net core
// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
Results.Json(
new { error = "unprocessable_content", message = "Unprocessable Content" },
statusCode: 422
)
);