HTTP
103 Early Hints レスポンスのモック
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
完全なリファレンスを見る →1 HTTP レスポンス
HTTP/1.1 103 Early Hints Content-Type: application/json Date: Tue, 25 Feb 2026 12:00:00 GMT
2 curl でテストする
curl -i https://httpbin.org/status/103
3 フレームワークで 103 Early Hints を返す
django
from django.http import HttpResponse
def my_view(request):
return HttpResponse(status=103) # Early Hints
flask
from flask import Flask
app = Flask(__name__)
@app.route("/endpoint")
def my_endpoint():
return "", 103 # Early Hints
fastapi
from fastapi import FastAPI
from fastapi.responses import Response
app = FastAPI()
@app.get("/endpoint")
def my_endpoint():
return Response(status_code=103) # Early Hints
express.js
// Express.js
app.get('/endpoint', (req, res) => {
res.sendStatus(103); // Early Hints
});
spring boot
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
@RestController
public class MyController {
@GetMapping("/endpoint")
public ResponseEntity<Void> myEndpoint() {
return ResponseEntity
.status(103) // Early Hints
.build();
}
}
go net/http
package main
import "net/http"
func myHandler(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(103) // Early Hints
}
ruby on rails
class MyController < ApplicationController
def my_action
head :early_hints
end
end
asp.net core
// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
Results.StatusCode(103) // Early Hints
);