WebSocket

Mock 1000 Normal Closure Response

The connection has been closed cleanly, meaning the purpose for which it was established has been fulfilled. Both endpoints agree the session is complete.

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1 HTTP Response

HTTP Response

HTTP/1.1 1000 Normal Closure
Content-Type: application/json
Date: Tue, 25 Feb 2026 12:00:00 GMT

2 Test with curl

terminal

curl -i https://httpbin.org/status/1000

3 Return 1000 Normal Closure in Your Framework

django

from django.http import HttpResponse


def my_view(request):
    return HttpResponse(status=1000)  # Normal Closure

flask

from flask import Flask

app = Flask(__name__)


@app.route("/endpoint")
def my_endpoint():
    return "", 1000  # Normal Closure

fastapi

from fastapi import FastAPI
from fastapi.responses import Response

app = FastAPI()


@app.get("/endpoint")
def my_endpoint():
    return Response(status_code=1000)  # Normal Closure

express.js

// Express.js
app.get('/endpoint', (req, res) => {
  res.sendStatus(1000); // Normal Closure
});

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(1000) // Normal Closure
            .build();
    }
}

go net/http

package main

import "net/http"

func myHandler(w http.ResponseWriter, r *http.Request) {
    w.WriteHeader(1000) // Normal Closure
}

ruby on rails

class MyController < ApplicationController
  def my_action
    head :normal_closure
  end
end

asp.net core

// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
    Results.StatusCode(1000) // Normal Closure
);

More WebSocket Mock Pages

1001 Going Away 1002 Protocol Error 1003 Unsupported Data 1005 No Status Received 1006 Abnormal Closure 1007 Invalid Payload Data 1008 Policy Violation 1009 Message Too Big 1010 Mandatory Extension 1011 Internal Error 1012 Service Restart 1013 Try Again Later