Merge pull request 'Feat/realtime challenge match' (#12) from feat/realtime-challenge-match into main

Reviewed-on: http://117.72.28.96:8765/Jacky/Hulumath-Web/pulls/12

Makefile

@@ -1,4 +1,4 @@
-.PHONY: install migrate seed run test check
+.PHONY: install migrate seed run run-asgi test check
 
 install:
 	python3 -m venv .venv
@@ -14,6 +14,9 @@ seed:
 run:
 	cd backend && ../.venv/bin/python manage.py runserver
 
+run-asgi:
+	cd backend && ../.venv/bin/uvicorn config.asgi:application --host 127.0.0.1 --port 8000 --reload
+
 test:
 	.venv/bin/python -m pytest -q
 

README.md

@@ -76,6 +76,7 @@ Gitea 会在 PR 合并到 `main` 后自动测试和部署：
 - [Ubuntu + 宝塔面板从零部署](docs/BAOTA_UBUNTU_FROM_ZERO.md)
 - [自动发布机制与运维说明](docs/DEPLOYMENT.md)
 - [MySQL 8 数据迁移说明](docs/MYSQL8_MIGRATION.md)
+- [本地实时 1v1 与联机码约战测试](docs/LOCAL_REALTIME_TEST.md)
 
 ## 目录
 

backend/common/test_frontend_assets.py

@@ -55,3 +55,18 @@ def test_toolbox_and_games_资源入口与移动端触控样式存在():
     assert ".calculator-controls [hidden]" in styles
     assert ".sudoku-board" in styles
     assert "@media (max-width: 700px)" in styles
+
+
+def test_realtime_match_联机码与_websocket_前端资源存在():
+    template = (settings.BASE_DIR / "templates" / "index.html").read_text(encoding="utf-8")
+    realtime = (STATIC_ROOT / "js" / "realtime.js").read_text(encoding="utf-8")
+    styles = (STATIC_ROOT / "css" / "app.css").read_text(encoding="utf-8")
+
+    assert 'id="challenge-create"' in template
+    assert 'id="challenge-join-form"' in template
+    assert template.count("js/realtime.js") == 1
+    assert "new WebSocket" in realtime
+    assert "setInterval(refreshMatch, 2000)" in realtime
+    assert "Idempotency-Key" in realtime
+    assert ".challenge-panel" in styles
+    assert ".realtime-progress-panel" in styles

backend/contest/admin.py

@@ -62,11 +62,32 @@ class QuestionVersionAdmin(admin.ModelAdmin):
 
 
 admin.site.register(ContestAnswer)
-admin.site.register(RealtimeMatch)
 admin.site.register(RatingHistory)
 admin.site.register(LeaderboardSnapshot)
 
 
+@admin.register(RealtimeMatch)
+class RealtimeMatchAdmin(admin.ModelAdmin):
+    list_display = (
+        "id",
+        "contest",
+        "match_type",
+        "challenge_code",
+        "player_one",
+        "player_two",
+        "status",
+        "created_at",
+    )
+    list_filter = ("match_type", "status", "contest__track")
+    search_fields = (
+        "challenge_code",
+        "player_one__username",
+        "player_two__username",
+    )
+    readonly_fields = ("created_at", "started_at", "completed_at")
+    ordering = ("-created_at",)
+
+
 @admin.register(MathGameAttempt)
 class MathGameAttemptAdmin(admin.ModelAdmin):
     list_display = (

backend/contest/consumers.py

@@ -26,7 +26,11 @@ class MatchConsumer(AsyncJsonWebsocketConsumer):
             await self.send_json({"type": "pong"})
             return
         if event_type == "progress":
-            answered_count = max(0, min(int(content.get("answered_count", 0)), 100))
+            try:
+                answered_count = max(0, min(int(content.get("answered_count", 0)), 100))
+            except (TypeError, ValueError):
+                await self.send_json({"type": "error", "message": "答题进度无效"})
+                return
             await self.channel_layer.group_send(
                 self.group_name,
                 {
@@ -45,6 +49,15 @@ class MatchConsumer(AsyncJsonWebsocketConsumer):
             }
         )
 
+    async def match_state(self, event):
+        await self.send_json(
+            {
+                "type": "state",
+                "reason": event["reason"],
+                "match_id": str(self.match_id),
+            }
+        )
+
     @database_sync_to_async
     def _is_participant(self, user_id):
         return RealtimeMatch.objects.filter(id=self.match_id).filter(

backend/contest/migrations/0004_remove_realtimematch_matchmaking_lookup_idx_and_more.py

@@ -0,0 +1,36 @@
+# Generated by Django 4.2.23 on 2026-08-08 18:41
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contest', '0003_mathgameattempt_and_more'),
+    ]
+
+    operations = [
+        migrations.RemoveIndex(
+            model_name='realtimematch',
+            name='matchmaking_lookup_idx',
+        ),
+        migrations.AddField(
+            model_name='realtimematch',
+            name='challenge_code',
+            field=models.CharField(blank=True, max_length=8, null=True, unique=True),
+        ),
+        migrations.AddField(
+            model_name='realtimematch',
+            name='expires_at',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='realtimematch',
+            name='match_type',
+            field=models.CharField(choices=[('random', '随机匹配'), ('challenge', '联机码约战')], default='random', max_length=16),
+        ),
+        migrations.AddIndex(
+            model_name='realtimematch',
+            index=models.Index(fields=['contest', 'match_type', 'status', 'player_one_rating', 'created_at'], name='matchmaking_lookup_idx'),
+        ),
+    ]

backend/contest/models.py

@@ -77,6 +77,10 @@ class ContestQuestion(models.Model):
 
 
 class RealtimeMatch(models.Model):
+    class MatchType(models.TextChoices):
+        RANDOM = "random", "随机匹配"
+        CHALLENGE = "challenge", "联机码约战"
+
     class Status(models.TextChoices):
         WAITING = "waiting", "等待对手"
         ACTIVE = "active", "进行中"
@@ -85,6 +89,12 @@ class RealtimeMatch(models.Model):
 
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     contest = models.ForeignKey(Contest, on_delete=models.PROTECT)
+    match_type = models.CharField(
+        max_length=16,
+        choices=MatchType.choices,
+        default=MatchType.RANDOM,
+    )
+    challenge_code = models.CharField(max_length=8, unique=True, null=True, blank=True)
     player_one = models.ForeignKey(
         settings.AUTH_USER_MODEL, on_delete=models.PROTECT, related_name="matches_as_player_one"
     )
@@ -106,13 +116,20 @@ class RealtimeMatch(models.Model):
         related_name="won_matches",
     )
     created_at = models.DateTimeField(auto_now_add=True)
+    expires_at = models.DateTimeField(null=True, blank=True)
     started_at = models.DateTimeField(null=True, blank=True)
     completed_at = models.DateTimeField(null=True, blank=True)
 
     class Meta:
         indexes = [
             models.Index(
-                fields=("contest", "status", "player_one_rating", "created_at"),
+                fields=(
+                    "contest",
+                    "match_type",
+                    "status",
+                    "player_one_rating",
+                    "created_at",
+                ),
                 name="matchmaking_lookup_idx",
             )
         ]

backend/contest/services.py

@@ -1,5 +1,9 @@
+import secrets
+from datetime import timedelta
 from decimal import Decimal
 
+from asgiref.sync import async_to_sync
+from channels.layers import get_channel_layer
 from django.db import transaction
 from django.db.models import Q
 from django.utils import timezone
@@ -16,6 +20,93 @@ from .models import (
     RealtimeMatch,
 )
 
+CHALLENGE_CODE_ALPHABET = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"
+WAITING_MATCH_TTL = timedelta(minutes=10)
+
+
+def _broadcast_match(match_id, reason):
+    channel_layer = get_channel_layer()
+    if channel_layer is None:
+        return
+    async_to_sync(channel_layer.group_send)(
+        f"match_{match_id}",
+        {
+            "type": "match.state",
+            "reason": reason,
+        },
+    )
+
+
+def notify_match_on_commit(match_id, reason):
+    transaction.on_commit(lambda: _broadcast_match(match_id, reason))
+
+
+def _new_challenge_code():
+    for _ in range(20):
+        code = "".join(secrets.choice(CHALLENGE_CODE_ALPHABET) for _ in range(6))
+        if not RealtimeMatch.objects.filter(challenge_code=code).exists():
+            return code
+    raise ValidationError("暂时无法生成联机码，请稍后重试")
+
+
+def _validate_realtime_contest(contest):
+    if contest.kind != Contest.Kind.REALTIME or contest.status != Contest.Status.PUBLISHED:
+        raise ValidationError("实时比赛不可用")
+
+
+def _cancel_expired_waiting_matches():
+    RealtimeMatch.objects.filter(status=RealtimeMatch.Status.WAITING).filter(
+        Q(expires_at__isnull=True) | Q(expires_at__lte=timezone.now())
+    ).update(status=RealtimeMatch.Status.CANCELLED)
+
+
+def _active_match_for(user):
+    return (
+        RealtimeMatch.objects.filter(
+            Q(player_one=user) | Q(player_two=user),
+            status=RealtimeMatch.Status.ACTIVE,
+        )
+        .select_related("contest", "player_one", "player_two")
+        .first()
+    )
+
+
+def _cancel_other_waiting_matches(user, match_type):
+    matches = list(
+        RealtimeMatch.objects.filter(
+            player_one=user,
+            status=RealtimeMatch.Status.WAITING,
+        )
+        .exclude(match_type=match_type)
+        .values_list("id", flat=True)
+    )
+    if matches:
+        RealtimeMatch.objects.filter(id__in=matches).update(
+            status=RealtimeMatch.Status.CANCELLED
+        )
+        for match_id in matches:
+            notify_match_on_commit(match_id, "cancelled")
+
+
+def _activate_match(match, user):
+    now = timezone.now()
+    match.player_two = user
+    match.player_two_rating = user.rating
+    match.status = RealtimeMatch.Status.ACTIVE
+    match.started_at = now
+    match.save(
+        update_fields=["player_two", "player_two_rating", "status", "started_at"]
+    )
+    ContestAttempt.objects.bulk_create(
+        [
+            ContestAttempt(contest=match.contest, user=match.player_one, match=match),
+            ContestAttempt(contest=match.contest, user=user, match=match),
+        ]
+    )
+    match.attempts.update(started_at=now)
+    notify_match_on_commit(match.id, "matched")
+    return match
+
 
 def normalize_answer(value):
     text = str(value).strip().lower().replace(" ", "")
@@ -35,12 +126,12 @@ def attempt_payload(attempt, include_results=False):
             "metadata": item.question_version.metadata,
             "points": item.points,
         }
-        if include_results and item.id in answers:
-            answer = answers[item.id]
+        if include_results:
+            answer = answers.get(item.id)
             question.update(
                 {
-                    "submitted_answer": answer.submitted_answer,
-                    "is_correct": answer.is_correct,
+                    "submitted_answer": answer.submitted_answer if answer else "",
+                    "is_correct": answer.is_correct if answer else False,
                     "correct_answer": item.question_version.answer,
                     "explanation": item.question_version.explanation,
                 }
@@ -48,6 +139,7 @@ def attempt_payload(attempt, include_results=False):
         questions.append(question)
     return {
         "attempt_id": attempt.id,
+        "match_id": attempt.match_id,
         "contest": attempt.contest.title,
         "kind": attempt.contest.kind,
         "status": attempt.status,
@@ -90,7 +182,10 @@ def submit_attempt(user, attempt_id, raw_answers, submission_key):
     )
     if attempt.status != ContestAttempt.Status.ACTIVE:
         if submission_key and attempt.submission_key == submission_key:
-            return attempt_payload(attempt, include_results=True)
+            include_results = not attempt.match_id or (
+                attempt.match.status == RealtimeMatch.Status.COMPLETED
+            )
+            return attempt_payload(attempt, include_results=include_results)
         raise ValidationError("该答题记录已经结算")
     if not submission_key:
         raise ValidationError({"Idempotency-Key": "正式提交必须提供幂等键"})
@@ -153,20 +248,34 @@ def submit_attempt(user, attempt_id, raw_answers, submission_key):
             },
         )
     if attempt.match_id:
-        finalize_match(attempt.match_id)
+        match = finalize_match(attempt.match_id)
+        if match.status != RealtimeMatch.Status.COMPLETED:
+            notify_match_on_commit(attempt.match_id, "submitted")
+        attempt.match.refresh_from_db()
+        return attempt_payload(
+            attempt,
+            include_results=attempt.match.status == RealtimeMatch.Status.COMPLETED,
+        )
     return attempt_payload(attempt, include_results=True)
 
 
 @transaction.atomic
 def find_match(user, contest):
-    if contest.kind != Contest.Kind.REALTIME or contest.status != Contest.Status.PUBLISHED:
-        raise ValidationError("实时比赛不可用")
+    _validate_realtime_contest(contest)
+    _cancel_expired_waiting_matches()
+    active = _active_match_for(user)
+    if active:
+        if active.contest_id == contest.id:
+            return active
+        raise ValidationError("你已有一场进行中的实时比赛")
+    _cancel_other_waiting_matches(user, RealtimeMatch.MatchType.RANDOM)
     existing = (
         RealtimeMatch.objects.filter(
             Q(player_one=user) | Q(player_two=user),
             contest=contest,
+            match_type=RealtimeMatch.MatchType.RANDOM,
             status__in=[RealtimeMatch.Status.WAITING, RealtimeMatch.Status.ACTIVE],
-        )
+        ).filter(Q(status=RealtimeMatch.Status.ACTIVE) | Q(expires_at__gt=timezone.now()))
         .order_by("-created_at")
         .first()
     )
@@ -177,7 +286,9 @@ def find_match(user, contest):
         RealtimeMatch.objects.select_for_update(skip_locked=True)
         .filter(
             contest=contest,
+            match_type=RealtimeMatch.MatchType.RANDOM,
             status=RealtimeMatch.Status.WAITING,
+            expires_at__gt=timezone.now(),
             player_one_rating__gte=max(0, user.rating - 300),
             player_one_rating__lte=user.rating + 300,
         )
@@ -188,42 +299,198 @@ def find_match(user, contest):
     if waiting is None:
         return RealtimeMatch.objects.create(
             contest=contest,
+            match_type=RealtimeMatch.MatchType.RANDOM,
             player_one=user,
             player_one_rating=user.rating,
+            expires_at=timezone.now() + WAITING_MATCH_TTL,
         )
 
-    waiting.player_two = user
-    waiting.player_two_rating = user.rating
-    waiting.status = RealtimeMatch.Status.ACTIVE
-    waiting.started_at = timezone.now()
-    waiting.save(
-        update_fields=["player_two", "player_two_rating", "status", "started_at"]
+    return _activate_match(waiting, user)
+
+
+@transaction.atomic
+def create_challenge(user, contest):
+    _validate_realtime_contest(contest)
+    _cancel_expired_waiting_matches()
+    active = _active_match_for(user)
+    if active:
+        raise ValidationError("你已有一场进行中的实时比赛")
+    _cancel_other_waiting_matches(user, RealtimeMatch.MatchType.CHALLENGE)
+    existing = (
+        RealtimeMatch.objects.filter(
+            player_one=user,
+            contest=contest,
+            match_type=RealtimeMatch.MatchType.CHALLENGE,
+            status=RealtimeMatch.Status.WAITING,
+            expires_at__gt=timezone.now(),
+        )
+        .order_by("-created_at")
+        .first()
     )
-    ContestAttempt.objects.bulk_create(
-        [
-            ContestAttempt(contest=contest, user=waiting.player_one, match=waiting),
-            ContestAttempt(contest=contest, user=user, match=waiting),
-        ]
+    if existing:
+        return existing
+    return RealtimeMatch.objects.create(
+        contest=contest,
+        match_type=RealtimeMatch.MatchType.CHALLENGE,
+        challenge_code=_new_challenge_code(),
+        player_one=user,
+        player_one_rating=user.rating,
+        expires_at=timezone.now() + WAITING_MATCH_TTL,
     )
-    return waiting
+
+
+@transaction.atomic
+def join_challenge(user, challenge_code):
+    _cancel_expired_waiting_matches()
+    code = str(challenge_code or "").strip().upper()
+    if len(code) != 6 or any(character not in CHALLENGE_CODE_ALPHABET for character in code):
+        raise ValidationError({"challenge_code": "联机码应为 6 位大写字母或数字"})
+    try:
+        match = (
+            RealtimeMatch.objects.select_for_update()
+            .select_related("contest", "player_one")
+            .get(
+                challenge_code=code,
+                match_type=RealtimeMatch.MatchType.CHALLENGE,
+            )
+        )
+    except RealtimeMatch.DoesNotExist as exc:
+        raise ValidationError({"challenge_code": "联机码不存在"}) from exc
+    if match.player_one_id == user.id:
+        raise ValidationError({"challenge_code": "不能加入自己创建的约战"})
+    if match.status != RealtimeMatch.Status.WAITING or (
+        match.expires_at and match.expires_at <= timezone.now()
+    ):
+        raise ValidationError({"challenge_code": "联机码已失效或已被使用"})
+    active = _active_match_for(user)
+    if active and active.id != match.id:
+        raise ValidationError("你已有一场进行中的实时比赛")
+    own_waiting_ids = list(
+        RealtimeMatch.objects.filter(
+            player_one=user,
+            status=RealtimeMatch.Status.WAITING,
+        )
+        .exclude(id=match.id)
+        .values_list("id", flat=True)
+    )
+    if own_waiting_ids:
+        RealtimeMatch.objects.filter(id__in=own_waiting_ids).update(
+            status=RealtimeMatch.Status.CANCELLED
+        )
+        for match_id in own_waiting_ids:
+            notify_match_on_commit(match_id, "cancelled")
+    return _activate_match(match, user)
+
+
+@transaction.atomic
+def cancel_waiting_match(user, match_id):
+    match = RealtimeMatch.objects.select_for_update().get(id=match_id)
+    if match.player_one_id != user.id:
+        raise ValidationError("只有创建者可以取消等待")
+    if match.status != RealtimeMatch.Status.WAITING:
+        raise ValidationError("只能取消等待中的比赛")
+    match.status = RealtimeMatch.Status.CANCELLED
+    match.save(update_fields=["status"])
+    notify_match_on_commit(match.id, "cancelled")
+    return match
 
 
 def match_payload(match, user):
-    attempt = match.attempts.filter(user=user).first()
+    reveal_results = match.status == RealtimeMatch.Status.COMPLETED
+    attempts = {
+        attempt.user_id: attempt
+        for attempt in match.attempts.select_related("user", "contest").all()
+    }
+    attempt = attempts.get(user.id)
     opponent = match.player_two if match.player_one_id == user.id else match.player_one
+    opponent_attempt = attempts.get(opponent.id) if opponent else None
+    rating_change = (
+        match.rating_changes.filter(user=user).values("delta", "rating_after").first()
+        if reveal_results
+        else None
+    )
     return {
         "match_id": match.id,
+        "match_type": match.match_type,
+        "is_owner": match.player_one_id == user.id,
+        "challenge_code": (
+            match.challenge_code
+            if match.match_type == RealtimeMatch.MatchType.CHALLENGE
+            and match.status == RealtimeMatch.Status.WAITING
+            else None
+        ),
         "status": match.status,
+        "contest": match.contest.title,
+        "duration_seconds": match.contest.duration_seconds,
+        "expires_at": match.expires_at,
+        "started_at": match.started_at,
         "opponent": (
-            {"nickname": opponent.nickname, "rating": opponent.rating}
+            {
+                "nickname": opponent.nickname,
+                "rating": opponent.rating,
+                "status": opponent_attempt.status if opponent_attempt else None,
+                "score": opponent_attempt.score if reveal_results and opponent_attempt else None,
+                "correct_count": (
+                    opponent_attempt.correct_count
+                    if reveal_results and opponent_attempt
+                    else None
+                ),
+            }
             if opponent
             else None
         ),
-        "attempt": attempt_payload(attempt) if attempt else None,
+        "attempt": (
+            attempt_payload(attempt, include_results=reveal_results)
+            if attempt
+            else None
+        ),
+        "result": (
+            {
+                "winner": (
+                    "draw"
+                    if match.winner_id is None
+                    else "self"
+                    if match.winner_id == user.id
+                    else "opponent"
+                ),
+                "rating_delta": rating_change["delta"] if rating_change else 0,
+                "rating_after": rating_change["rating_after"] if rating_change else user.rating,
+            }
+            if reveal_results
+            else None
+        ),
         "websocket_path": f"/ws/v1/contest/matches/{match.id}/",
     }
 
 
+@transaction.atomic
+def refresh_match_state(match_id):
+    match = (
+        RealtimeMatch.objects.select_for_update()
+        .select_related("contest", "player_one", "player_two")
+        .get(id=match_id)
+    )
+    if (
+        match.status == RealtimeMatch.Status.WAITING
+        and match.expires_at
+        and match.expires_at <= timezone.now()
+    ):
+        match.status = RealtimeMatch.Status.CANCELLED
+        match.save(update_fields=["status"])
+        notify_match_on_commit(match.id, "expired")
+    elif match.status == RealtimeMatch.Status.ACTIVE and match.started_at:
+        deadline = match.started_at + timedelta(seconds=match.contest.duration_seconds)
+        if timezone.now() >= deadline:
+            elapsed_ms = match.contest.duration_seconds * 1000
+            match.attempts.filter(status=ContestAttempt.Status.ACTIVE).update(
+                status=ContestAttempt.Status.EXPIRED,
+                duration_ms=elapsed_ms,
+                submitted_at=timezone.now(),
+            )
+            match = finalize_match(match.id)
+    return match
+
+
 def _elo_delta(rating, opponent_rating, score, k=32):
     expected = 1 / (1 + 10 ** ((opponent_rating - rating) / 400))
     return round(k * (score - expected))
@@ -277,4 +544,5 @@ def finalize_match(match_id):
     match.status = RealtimeMatch.Status.COMPLETED
     match.completed_at = timezone.now()
     match.save(update_fields=["winner", "status", "completed_at"])
+    notify_match_on_commit(match.id, "completed")
     return match

backend/contest/test_consumers.py

@@ -0,0 +1,87 @@
+import pytest
+from asgiref.sync import async_to_sync
+from channels.layers import get_channel_layer
+from channels.routing import URLRouter
+from channels.testing import WebsocketCommunicator
+from django.urls import path
+
+from accounts.models import User
+from contest.consumers import MatchConsumer
+from contest.models import Contest, Question, RealtimeMatch
+
+
+@pytest.mark.django_db(transaction=True)
+def test_match_consumer_双方连接并同步答题进度():
+    first = User.objects.create_user(
+        username="socket_player_one",
+        password="StrongPass_2026",
+        nickname="WS 玩家一",
+    )
+    second = User.objects.create_user(
+        username="socket_player_two",
+        password="StrongPass_2026",
+        nickname="WS 玩家二",
+    )
+    outsider = User.objects.create_user(
+        username="socket_outsider",
+        password="StrongPass_2026",
+        nickname="WS 局外人",
+    )
+    contest = Contest.objects.create(
+        slug="socket-contest",
+        title="WebSocket 联机赛",
+        kind=Contest.Kind.REALTIME,
+        track=Question.Track.STANDARD,
+        status=Contest.Status.PUBLISHED,
+    )
+    match = RealtimeMatch.objects.create(
+        contest=contest,
+        player_one=first,
+        player_two=second,
+        player_one_rating=first.rating,
+        player_two_rating=second.rating,
+        status=RealtimeMatch.Status.ACTIVE,
+    )
+    application = URLRouter(
+        [
+            path(
+                "ws/test/<uuid:match_id>/",
+                MatchConsumer.as_asgi(),
+            )
+        ]
+    )
+
+    async def scenario():
+        outsider_socket = WebsocketCommunicator(application, f"/ws/test/{match.id}/")
+        outsider_socket.scope["user"] = outsider
+        outsider_connected, close_code = await outsider_socket.connect()
+        assert not outsider_connected
+        assert close_code == 4403
+
+        first_socket = WebsocketCommunicator(application, f"/ws/test/{match.id}/")
+        second_socket = WebsocketCommunicator(application, f"/ws/test/{match.id}/")
+        first_socket.scope["user"] = first
+        second_socket.scope["user"] = second
+        first_connected, _ = await first_socket.connect()
+        second_connected, _ = await second_socket.connect()
+        assert first_connected and second_connected
+        assert (await first_socket.receive_json_from())["type"] == "connected"
+        assert (await second_socket.receive_json_from())["type"] == "connected"
+
+        await first_socket.send_json_to({"type": "progress", "answered_count": 3})
+        first_progress = await first_socket.receive_json_from()
+        second_progress = await second_socket.receive_json_from()
+        assert first_progress["answered_count"] == 3
+        assert second_progress["answered_count"] == 3
+        assert second_progress["user_id"] == str(first.id)
+
+        await get_channel_layer().group_send(
+            f"match_{match.id}",
+            {"type": "match.state", "reason": "completed"},
+        )
+        assert (await first_socket.receive_json_from())["reason"] == "completed"
+        assert (await second_socket.receive_json_from())["reason"] == "completed"
+        await first_socket.disconnect()
+        await second_socket.disconnect()
+
+    async_to_sync(scenario)()

backend/contest/test_realtime_api.py

@@ -0,0 +1,96 @@
+import pytest
+from django.test import Client
+
+from accounts.models import User
+from contest.models import Contest, ContestQuestion, Question, QuestionVersion
+
+
+@pytest.fixture
+def realtime_api_setup(db):
+    question = Question.objects.create(
+        slug="realtime-api-question",
+        track=Question.Track.STANDARD,
+    )
+    version = QuestionVersion.objects.create(
+        question=question,
+        version=1,
+        prompt="18 + 24",
+        answer="42",
+        explanation="18 + 24 = 42",
+    )
+    contest = Contest.objects.create(
+        slug="realtime-api",
+        title="API 联机赛",
+        kind=Contest.Kind.REALTIME,
+        track=Question.Track.STANDARD,
+        status=Contest.Status.PUBLISHED,
+        duration_seconds=60,
+    )
+    ContestQuestion.objects.create(
+        contest=contest,
+        question_version=version,
+        order=1,
+        points=100,
+    )
+    first = User.objects.create_user(
+        username="api_player_one",
+        password="StrongPass_2026",
+        nickname="API 玩家一",
+    )
+    second = User.objects.create_user(
+        username="api_player_two",
+        password="StrongPass_2026",
+        nickname="API 玩家二",
+    )
+    first_client = Client()
+    second_client = Client()
+    first_client.force_login(first)
+    second_client.force_login(second)
+    return contest, first_client, second_client
+
+
+@pytest.mark.django_db
+def test_challenge_api_创建加入状态提交形成完整闭环(realtime_api_setup):
+    contest, first_client, second_client = realtime_api_setup
+    created = first_client.post(
+        f"/api/v1/contests/{contest.slug}/challenges/",
+        {},
+        content_type="application/json",
+    )
+    code = created.json()["challenge_code"]
+
+    joined = second_client.post(
+        "/api/v1/contests/challenges/join/",
+        {"challenge_code": code.lower()},
+        content_type="application/json",
+    )
+    match_id = joined.json()["match_id"]
+    first_state = first_client.get(f"/api/v1/contests/matches/{match_id}/")
+
+    assert created.status_code == 201
+    assert joined.status_code == 200
+    assert joined.json()["status"] == "active"
+    assert first_state.json()["opponent"]["nickname"] == "API 玩家二"
+
+    first_attempt = first_state.json()["attempt"]["attempt_id"]
+    second_attempt = joined.json()["attempt"]["attempt_id"]
+    first_submit = first_client.post(
+        f"/api/v1/contests/attempts/{first_attempt}/submit/",
+        {"answers": [{"order": 1, "answer": "42"}]},
+        content_type="application/json",
+        HTTP_IDEMPOTENCY_KEY="api-submit-one",
+    )
+    second_submit = second_client.post(
+        f"/api/v1/contests/attempts/{second_attempt}/submit/",
+        {"answers": [{"order": 1, "answer": "0"}]},
+        content_type="application/json",
+        HTTP_IDEMPOTENCY_KEY="api-submit-two",
+    )
+
+    assert first_submit.json()["status"] == "active"
+    assert "correct_answer" not in first_submit.json()["attempt"]["questions"][0]
+    assert second_submit.json()["status"] == "completed"
+    assert second_submit.json()["result"]["winner"] == "opponent"
+    final_state = first_client.get(f"/api/v1/contests/matches/{match_id}/").json()
+    assert final_state["result"]["winner"] == "self"
+    assert final_state["attempt"]["questions"][0]["correct_answer"] == "42"

backend/contest/test_services.py

@@ -15,9 +15,14 @@ from contest.models import (
     RealtimeMatch,
 )
 from contest.services import (
+    cancel_waiting_match,
+    create_challenge,
     finalize_match,
     find_match,
+    join_challenge,
+    match_payload,
     normalize_answer,
+    refresh_match_state,
     start_attempt,
     submit_attempt,
 )
@@ -62,6 +67,16 @@ def daily_contest(db):
     return contest
 
 
+@pytest.fixture
+def realtime_contest(daily_contest):
+    daily_contest.kind = Contest.Kind.REALTIME
+    daily_contest.slug = "realtime-with-question"
+    daily_contest.title = "联机测试赛"
+    daily_contest.duration_seconds = 60
+    daily_contest.save(update_fields=["kind", "slug", "title", "duration_seconds"])
+    return daily_contest
+
+
 @pytest.mark.parametrize(
     "raw, expected",
     [
@@ -201,3 +216,147 @@ def test_find_match_同分玩家配对并由_finalize_match_唯一结算_rating(
     assert first.rating == 1016
     assert second.rating == 984
     assert RatingHistory.objects.filter(match=active).count() == 2
+
+
+@pytest.mark.django_db
+def test_challenge_code_创建者和加入者通过联机码进入同一场(realtime_contest):
+    first = User.objects.create_user(
+        username="challenge_owner",
+        password="StrongPass_2026",
+        nickname="房主",
+    )
+    second = User.objects.create_user(
+        username="challenge_guest",
+        password="StrongPass_2026",
+        nickname="访客",
+    )
+
+    waiting = create_challenge(first, realtime_contest)
+    active = join_challenge(second, waiting.challenge_code.lower())
+    owner_payload = match_payload(active, first)
+    guest_payload = match_payload(active, second)
+
+    assert len(waiting.challenge_code) == 6
+    assert active.id == waiting.id
+    assert active.match_type == RealtimeMatch.MatchType.CHALLENGE
+    assert active.status == RealtimeMatch.Status.ACTIVE
+    assert active.attempts.count() == 2
+    assert owner_payload["opponent"]["nickname"] == "访客"
+    assert guest_payload["opponent"]["nickname"] == "房主"
+    assert owner_payload["attempt"]["questions"] == guest_payload["attempt"]["questions"]
+
+
+@pytest.mark.django_db
+def test_random_match_不会加入联机码约战(realtime_contest):
+    owner = User.objects.create_user(
+        username="private_owner",
+        password="StrongPass_2026",
+        nickname="约战房主",
+    )
+    random_player = User.objects.create_user(
+        username="random_player",
+        password="StrongPass_2026",
+        nickname="随机玩家",
+    )
+
+    challenge = create_challenge(owner, realtime_contest)
+    random_match = find_match(random_player, realtime_contest)
+
+    assert challenge.status == RealtimeMatch.Status.WAITING
+    assert random_match.id != challenge.id
+    assert random_match.match_type == RealtimeMatch.MatchType.RANDOM
+
+
+@pytest.mark.django_db
+def test_realtime_submit_双方结束前不泄露答案且结束后结算(realtime_contest):
+    first = User.objects.create_user(
+        username="fair_player_one",
+        password="StrongPass_2026",
+        nickname="公平玩家一",
+    )
+    second = User.objects.create_user(
+        username="fair_player_two",
+        password="StrongPass_2026",
+        nickname="公平玩家二",
+    )
+    match = join_challenge(
+        second,
+        create_challenge(first, realtime_contest).challenge_code,
+    )
+    first_attempt = match.attempts.get(user=first)
+    second_attempt = match.attempts.get(user=second)
+
+    first_result = submit_attempt(
+        first,
+        first_attempt.id,
+        [{"order": 1, "answer": "42"}],
+        "fair-submit-one",
+    )
+    active_payload = match_payload(match, first)
+
+    assert "correct_answer" not in first_result["questions"][0]
+    assert active_payload["status"] == RealtimeMatch.Status.ACTIVE
+    assert active_payload["attempt"]["status"] == ContestAttempt.Status.SUBMITTED
+
+    submit_attempt(
+        second,
+        second_attempt.id,
+        [{"order": 1, "answer": "0"}],
+        "fair-submit-two",
+    )
+    match.refresh_from_db()
+    completed_payload = match_payload(match, first)
+
+    assert match.status == RealtimeMatch.Status.COMPLETED
+    assert completed_payload["result"]["winner"] == "self"
+    assert completed_payload["attempt"]["questions"][0]["correct_answer"] == "42"
+    assert completed_payload["opponent"]["score"] == 0
+
+
+@pytest.mark.django_db
+def test_realtime_timeout_未提交玩家自动过期并完成比赛(realtime_contest):
+    first = User.objects.create_user(
+        username="timeout_one",
+        password="StrongPass_2026",
+        nickname="超时玩家一",
+    )
+    second = User.objects.create_user(
+        username="timeout_two",
+        password="StrongPass_2026",
+        nickname="超时玩家二",
+    )
+    match = join_challenge(
+        second,
+        create_challenge(first, realtime_contest).challenge_code,
+    )
+    RealtimeMatch.objects.filter(id=match.id).update(
+        started_at=timezone.now() - timedelta(seconds=61)
+    )
+
+    refreshed = refresh_match_state(match.id)
+
+    assert refreshed.status == RealtimeMatch.Status.COMPLETED
+    assert not refreshed.attempts.filter(status=ContestAttempt.Status.ACTIVE).exists()
+
+
+@pytest.mark.django_db
+def test_challenge_owner_可取消等待中的联机码(realtime_contest):
+    owner = User.objects.create_user(
+        username="cancel_owner",
+        password="StrongPass_2026",
+        nickname="取消房主",
+    )
+    waiting = create_challenge(owner, realtime_contest)
+
+    cancelled = cancel_waiting_match(owner, waiting.id)
+
+    assert cancelled.status == RealtimeMatch.Status.CANCELLED
+    with pytest.raises(ValidationError, match="失效"):
+        join_challenge(
+            User.objects.create_user(
+                username="late_guest",
+                password="StrongPass_2026",
+                nickname="迟到访客",
+            ),
+            waiting.challenge_code,
+        )

backend/contest/urls.py

@@ -3,8 +3,11 @@ from django.urls import path
 from .views import (
     AttemptStartView,
     AttemptSubmitView,
+    ChallengeCreateView,
+    ChallengeJoinView,
     ContestListView,
     LeaderboardView,
+    MatchCancelView,
     MatchmakingView,
     MatchStateView,
     MathGameCatalogView,
@@ -16,11 +19,18 @@ from .views import (
 
 urlpatterns = [
     path("", ContestListView.as_view(), name="contest-list"),
+    path("challenges/join/", ChallengeJoinView.as_view(), name="challenge-join"),
+    path("matches/<uuid:match_id>/", MatchStateView.as_view(), name="match-state"),
+    path("matches/<uuid:match_id>/cancel/", MatchCancelView.as_view(), name="match-cancel"),
     path("<slug:slug>/start/", AttemptStartView.as_view(), name="attempt-start"),
     path("<slug:slug>/matchmaking/", MatchmakingView.as_view(), name="matchmaking"),
+    path(
+        "<slug:slug>/challenges/",
+        ChallengeCreateView.as_view(),
+        name="challenge-create",
+    ),
     path("<slug:slug>/leaderboard/", LeaderboardView.as_view(), name="leaderboard"),
     path("attempts/<uuid:attempt_id>/submit/", AttemptSubmitView.as_view(), name="attempt-submit"),
-    path("matches/<uuid:match_id>/", MatchStateView.as_view(), name="match-state"),
     path("games/", MathGameCatalogView.as_view(), name="math-game-catalog"),
     path("games/history/", MathGameHistoryView.as_view(), name="math-game-history"),
     path("games/<str:kind>/start/", MathGameStartView.as_view(), name="math-game-start"),

backend/contest/views.py

@@ -6,8 +6,12 @@ from rest_framework.views import APIView
 from .game_services import game_payload, request_sudoku_hint, start_game, submit_game
 from .models import Contest, ContestAttempt, MathGameAttempt, RealtimeMatch
 from .services import (
+    cancel_waiting_match,
+    create_challenge,
     find_match,
+    join_challenge,
     match_payload,
+    refresh_match_state,
     start_attempt,
     submit_attempt,
 )
@@ -44,13 +48,16 @@ class AttemptStartView(APIView):
 
 class AttemptSubmitView(APIView):
     def post(self, request, attempt_id):
-        get_object_or_404(ContestAttempt, id=attempt_id, user=request.user)
+        attempt = get_object_or_404(ContestAttempt, id=attempt_id, user=request.user)
         payload = submit_attempt(
             user=request.user,
             attempt_id=attempt_id,
             raw_answers=request.data.get("answers", []),
             submission_key=request.headers.get("Idempotency-Key"),
         )
+        if attempt.match_id:
+            match = refresh_match_state(attempt.match_id)
+            return Response(match_payload(match, request.user))
         return Response(payload)
 
 
@@ -63,12 +70,33 @@ class MatchmakingView(APIView):
 
 class MatchStateView(APIView):
     def get(self, request, match_id):
-        match = get_object_or_404(
+        existing = get_object_or_404(
             RealtimeMatch.objects.select_related("player_one", "player_two"),
             id=match_id,
         )
-        if request.user.id not in (match.player_one_id, match.player_two_id):
+        if request.user.id not in (existing.player_one_id, existing.player_two_id):
             return Response(status=status.HTTP_403_FORBIDDEN)
+        match = refresh_match_state(match_id)
+        return Response(match_payload(match, request.user))
+
+
+class ChallengeCreateView(APIView):
+    def post(self, request, slug):
+        contest = get_object_or_404(Contest, slug=slug)
+        match = create_challenge(request.user, contest)
+        return Response(match_payload(match, request.user), status=status.HTTP_201_CREATED)
+
+
+class ChallengeJoinView(APIView):
+    def post(self, request):
+        match = join_challenge(request.user, request.data.get("challenge_code"))
+        return Response(match_payload(match, request.user))
+
+
+class MatchCancelView(APIView):
+    def post(self, request, match_id):
+        get_object_or_404(RealtimeMatch, id=match_id)
+        match = cancel_waiting_match(request.user, match_id)
         return Response(match_payload(match, request.user))
 
 

backend/static/css/app.css

@@ -132,6 +132,14 @@ button { color: inherit; }
 .track-switch { display: flex; gap: 5px; margin-bottom: 22px; }
 .track-switch button { border: 1px solid var(--line); padding: 9px 18px; border-radius: 99px; background: transparent; cursor: pointer; }
 .track-switch button.active { background: var(--ink); color: white; }
+.challenge-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, .9fr); gap: 24px; align-items: center; margin-bottom: 22px; padding: 24px 26px; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(120deg, rgba(25,101,72,.07), rgba(204,232,91,.12)); }.challenge-panel h2 { margin: 7px 0 6px; font: 27px Georgia, serif; }.challenge-panel p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }.challenge-actions { display: grid; gap: 9px; }.challenge-actions > .primary-button { width: 100%; }.challenge-actions form { display: grid; grid-template-columns: 1fr auto; gap: 8px; }.challenge-actions input { min-width: 0; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; background: white; text-transform: uppercase; letter-spacing: .18em; font-weight: 700; }.challenge-actions .dark-button { width: auto; margin: 0; white-space: nowrap; }
+.realtime-status-line { display: flex; justify-content: space-between; gap: 15px; margin: 10px 0 18px; color: var(--muted); font-size: 11px; }.realtime-status-line strong { color: var(--green); }
+.realtime-waiting { display: grid; justify-items: center; gap: 16px; padding: 35px 20px; border-radius: 18px; background: #eef1eb; text-align: center; }.realtime-waiting p { max-width: 480px; margin: 0; color: var(--muted); line-height: 1.7; }.realtime-pulse { width: 18px; height: 18px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(25,101,72,.35); animation: realtime-pulse 1.5s infinite; }.challenge-code { border: 1px dashed var(--green); border-radius: 14px; padding: 14px 24px; background: white; color: var(--green); font: 700 31px/1 "SFMono-Regular", Consolas, monospace; letter-spacing: .22em; cursor: pointer; }
+@keyframes realtime-pulse { 70% { box-shadow: 0 0 0 15px rgba(25,101,72,0); } 100% { box-shadow: 0 0 0 0 rgba(25,101,72,0); } }
+.realtime-progress-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }.realtime-progress-panel > div { padding: 13px 15px; border-radius: 12px; background: #eef1eb; }.realtime-progress-panel span, .realtime-progress-panel b { display: block; }.realtime-progress-panel span { color: var(--muted); font-size: 10px; }.realtime-progress-panel b { margin-top: 5px; color: var(--green); }
+.realtime-answer-form input { margin-top: 7px; width: 100%; padding: 12px; border: 1px solid #d6d8d1; border-radius: 9px; }.realtime-submitted { margin-top: 20px; padding: 30px; border-radius: 16px; background: var(--ink); color: white; text-align: center; }.realtime-submitted strong { color: var(--lime); font: 27px Georgia, serif; }.realtime-submitted p { margin-bottom: 0; color: #b9c2bc; }
+.realtime-result { margin: 20px 0; padding: 28px; border-radius: 17px; background: var(--ink); color: white; text-align: center; }.realtime-result > strong { color: var(--lime); font: 38px Georgia, serif; }.realtime-result p { color: #c5cec8; }.realtime-result > b { display: inline-block; padding: 6px 10px; border-radius: 99px; background: rgba(204,232,91,.13); color: var(--lime); }.result-opponent > strong { color: #ef947c; }
+.realtime-review { display: grid; gap: 9px; }.realtime-review article { padding: 15px; border: 1px solid var(--line); border-left: 4px solid var(--green); border-radius: 11px; background: white; }.realtime-review article.incorrect { border-left-color: #c05245; }.realtime-review p { margin: 7px 0; color: #3e4942; }.realtime-review small { color: var(--muted); }
 .math-games-section { margin-top: 60px; }
 .game-card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
 .game-card { min-height: 285px; padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); display: flex; flex-direction: column; overflow: hidden; position: relative; }
@@ -262,6 +270,7 @@ dialog::backdrop { background: rgba(17,25,20,.55); backdrop-filter: blur(5px); }
   .content-grid { gap: 11px; }.editor-shell { min-height: 700px; }.page-title { padding-top: 42px; }.page-title h1 { font-size: 45px; }
   .tool-card { min-height: 125px; }.workspace-heading, .map-heading { display: block; }.workspace-heading p { margin-top: 12px; }.tool-workspace { padding: 16px; }.calculator-controls { grid-template-columns: 1fr 1fr; }.calculator-display { min-height: 120px; padding: 18px; }.calculator-display output { font-size: 34px; }.calc-examples .primary-button { width: 100%; margin-left: 0; }.drawing-toolbar { align-items: stretch; }.drawing-toolbar .primary-button { width: 100%; margin-left: 0; }.canvas-stage canvas { width: 100%; min-width: 0; }
   .math-games-section { margin-top: 45px; }.game-card { min-height: 260px; padding: 21px; }.game-card-controls { align-items: stretch; }.game-card-controls .primary-button { flex: 1; }.twenty-four-numbers { gap: 7px; }.twenty-four-numbers button { border-radius: 13px; font-size: 28px; }.sudoku-board input { font-size: clamp(13px, 4.5vw, 20px); }.sudoku-actions { display: grid; grid-template-columns: 1fr 1fr; }.game-keypad { gap: 5px; }
+  .challenge-panel { grid-template-columns: 1fr; padding: 20px; }.challenge-actions form { grid-template-columns: 1fr; }.challenge-actions .dark-button { width: 100%; }.challenge-code { width: 100%; padding: 14px 10px; font-size: 27px; }.realtime-status-line { display: grid; }.realtime-progress-panel { grid-template-columns: 1fr 1fr; }
   .map-stage { height: 480px; transform: scale(.92); }.ability-node { width: 108px; height: 94px; }.node-vision { left: calc(50% - 54px); }.node-humanities { left: 0; top: 100px; }.node-connection { right: 0; top: 100px; }.node-detection { left: 2%; bottom: 30px; }.node-modeling { right: 2%; bottom: 30px; }.pet-node { top: 190px; }
   .map-lines { display: none; }.ability-legend { margin-top: 14px; justify-content: start; }.video-cover { height: 150px; }
 }

backend/static/js/app.js

@@ -308,12 +308,8 @@ async function beginContest(contest) {
   if (!requireAuth()) return;
   try {
     if (contest.kind === "realtime") {
-      const match = await api(`contests/${contest.slug}/matchmaking/`, { method: "POST", body: {} });
-      if (match.status === "waiting") {
-        showToast("已进入匹配队列，等待同赛道对手");
-        return;
-      }
-      renderAttempt(match.attempt);
+      await window.HuluRealtime.startRandom(contest);
+      return;
     } else {
       renderAttempt(await api(`contests/${contest.slug}/start/`, { method: "POST", body: {} }));
     }
@@ -951,6 +947,7 @@ function bindUI() {
   $("#auth-button").addEventListener("click", async () => {
     if (!state.user) return openAuth();
     await api("accounts/logout/", { method: "POST", body: {} });
+    window.HuluRealtime?.reset();
     state.user = null;
     updateUserUI();
     showToast("已退出登录");
@@ -996,6 +993,7 @@ function bindUI() {
 async function boot() {
   bindUI();
   window.HuluToolbox?.init();
+  window.HuluRealtime?.init();
   renderSymbols();
   await Promise.all([
     loadUser(),

backend/static/js/realtime.js

@@ -0,0 +1,451 @@
+(function () {
+  const realtime = {
+    match: null,
+    socket: null,
+    pollTimer: null,
+    clockTimer: null,
+    opponentProgress: 0,
+    reconnectTimer: null,
+  };
+
+  function stopTimers() {
+    if (realtime.pollTimer) window.clearInterval(realtime.pollTimer);
+    if (realtime.clockTimer) window.clearInterval(realtime.clockTimer);
+    realtime.pollTimer = null;
+    realtime.clockTimer = null;
+  }
+
+  function closeSocket() {
+    if (realtime.reconnectTimer) window.clearTimeout(realtime.reconnectTimer);
+    realtime.reconnectTimer = null;
+    if (realtime.socket) {
+      realtime.socket.onclose = null;
+      realtime.socket.close();
+    }
+    realtime.socket = null;
+  }
+
+  function websocketUrl(path) {
+    const protocol = window.location.protocol === "https:" ? "wss:" : "ws:";
+    return `${protocol}//${window.location.host}${path}`;
+  }
+
+  function connectSocket() {
+    closeSocket();
+    if (!realtime.match?.websocket_path) return;
+    const socket = new WebSocket(websocketUrl(realtime.match.websocket_path));
+    realtime.socket = socket;
+    socket.addEventListener("open", () => {
+      updateConnectionStatus("实时连接已建立");
+      socket.send(JSON.stringify({ type: "ping" }));
+    });
+    socket.addEventListener("message", async (event) => {
+      let message;
+      try {
+        message = JSON.parse(event.data);
+      } catch {
+        return;
+      }
+      if (message.type === "state") {
+        await refreshMatch();
+      } else if (
+        message.type === "progress" &&
+        message.user_id !== String(state.user?.id)
+      ) {
+        realtime.opponentProgress = message.answered_count;
+        updateProgressUI();
+      }
+    });
+    socket.addEventListener("close", () => {
+      updateConnectionStatus("实时连接中断，正在使用轮询");
+      if (["waiting", "active"].includes(realtime.match?.status)) {
+        realtime.reconnectTimer = window.setTimeout(connectSocket, 2000);
+      }
+    });
+    socket.addEventListener("error", () => {
+      updateConnectionStatus("WebSocket 不可用，轮询仍在工作");
+    });
+  }
+
+  function updateConnectionStatus(message) {
+    const node = document.querySelector("#realtime-connection");
+    if (node) node.textContent = message;
+  }
+
+  async function refreshMatch() {
+    if (!realtime.match?.match_id) return;
+    try {
+      const match = await api(`contests/matches/${realtime.match.match_id}/`);
+      const previous = realtime.match;
+      const previousStatus = previous.status;
+      realtime.match = match;
+      const shouldRender =
+        previous.status !== match.status ||
+        previous.attempt?.status !== match.attempt?.status;
+      if (shouldRender) renderMatch();
+      else {
+        updateClock();
+        if (
+          previous.opponent?.status !== match.opponent?.status &&
+          match.opponent?.status &&
+          match.opponent.status !== "active"
+        ) {
+          realtime.opponentProgress = match.attempt?.questions.length || 0;
+          updateProgressUI();
+          updateConnectionStatus("对手已提交，完成后将立即结算");
+        }
+      }
+      if (previousStatus === "waiting" && match.status === "active") {
+        showToast(`已匹配到 ${match.opponent.nickname}`);
+      }
+      if (!["waiting", "active"].includes(match.status)) {
+        stopTimers();
+        closeSocket();
+      }
+    } catch (error) {
+      if (error.status === 404) {
+        stopTimers();
+        closeSocket();
+      }
+    }
+  }
+
+  function startPolling() {
+    stopTimers();
+    realtime.pollTimer = window.setInterval(refreshMatch, 2000);
+    realtime.clockTimer = window.setInterval(updateClock, 250);
+  }
+
+  function openMatch(match) {
+    realtime.match = match;
+    realtime.opponentProgress = 0;
+    renderMatch();
+    const dialog = document.querySelector("#experience-dialog");
+    if (!dialog.open) dialog.showModal();
+    connectSocket();
+    if (["waiting", "active"].includes(match.status)) startPolling();
+  }
+
+  function header(root, match) {
+    const label = document.createElement("span");
+    label.className = "kicker";
+    label.textContent =
+      `${match.match_type === "challenge" ? "联机码约战" : "随机匹配"} · REALTIME`;
+    const title = document.createElement("h2");
+    title.textContent = match.contest;
+    const status = document.createElement("div");
+    status.className = "realtime-status-line";
+    const connection = document.createElement("span");
+    connection.id = "realtime-connection";
+    connection.textContent = "正在建立实时连接…";
+    const clock = document.createElement("strong");
+    clock.id = "realtime-clock";
+    status.append(connection, clock);
+    root.append(label, title, status);
+  }
+
+  function updateClock() {
+    const clock = document.querySelector("#realtime-clock");
+    if (!clock || !realtime.match) return;
+    if (realtime.match.status === "waiting") {
+      const expiresAt = new Date(realtime.match.expires_at).getTime();
+      const seconds = Math.max(0, Math.ceil((expiresAt - Date.now()) / 1000));
+      clock.textContent = `联机码 ${Math.floor(seconds / 60)}:${String(seconds % 60).padStart(2, "0")} 后失效`;
+      return;
+    }
+    if (realtime.match.status === "active") {
+      const startedAt = new Date(realtime.match.started_at).getTime();
+      const elapsed = (Date.now() - startedAt) / 1000;
+      const remaining = Math.max(0, Math.ceil(realtime.match.duration_seconds - elapsed));
+      clock.textContent = `剩余 ${remaining} 秒`;
+      if (remaining === 0) refreshMatch();
+      return;
+    }
+    clock.textContent = "";
+  }
+
+  async function copyCode(code) {
+    try {
+      await navigator.clipboard.writeText(code);
+      showToast(`联机码 ${code} 已复制`);
+    } catch {
+      showToast(`联机码：${code}`);
+    }
+  }
+
+  function renderWaiting(root, match) {
+    const panel = document.createElement("div");
+    panel.className = "realtime-waiting";
+    const pulse = document.createElement("span");
+    pulse.className = "realtime-pulse";
+    const message = document.createElement("p");
+    message.textContent =
+      match.match_type === "challenge"
+        ? "把联机码发给朋友。对方加入后会自动开始，无需再次点击。"
+        : "正在寻找同赛道、相近 Rating 的玩家。";
+    panel.append(pulse, message);
+    if (match.challenge_code) {
+      const code = document.createElement("button");
+      code.className = "challenge-code";
+      code.textContent = match.challenge_code;
+      code.title = "点击复制联机码";
+      code.addEventListener("click", () => copyCode(match.challenge_code));
+      panel.append(code);
+    }
+    if (match.is_owner) {
+      const cancel = document.createElement("button");
+      cancel.className = "ghost-button";
+      cancel.textContent = "取消等待";
+      cancel.addEventListener("click", async () => {
+        cancel.disabled = true;
+        try {
+          realtime.match = await api(`contests/matches/${match.match_id}/cancel/`, {
+            method: "POST",
+            body: {},
+          });
+          renderMatch();
+          stopTimers();
+          closeSocket();
+        } catch (error) {
+          showToast(error.message);
+          cancel.disabled = false;
+        }
+      });
+      panel.append(cancel);
+    }
+    root.append(panel);
+    updateClock();
+  }
+
+  function progressPanel(root, match) {
+    const panel = document.createElement("div");
+    panel.className = "realtime-progress-panel";
+    const self = document.createElement("div");
+    self.innerHTML = `<span>你</span><b id="self-progress">0 / ${match.attempt.questions.length}</b>`;
+    const opponent = document.createElement("div");
+    opponent.innerHTML =
+      `<span>${match.opponent?.nickname || "对手"}</span>` +
+      `<b id="opponent-progress">${realtime.opponentProgress} / ${match.attempt.questions.length}</b>`;
+    panel.append(self, opponent);
+    root.append(panel);
+  }
+
+  function updateProgressUI(selfCount) {
+    if (Number.isInteger(selfCount)) {
+      const self = document.querySelector("#self-progress");
+      if (self && realtime.match?.attempt) {
+        self.textContent = `${selfCount} / ${realtime.match.attempt.questions.length}`;
+      }
+    }
+    const opponent = document.querySelector("#opponent-progress");
+    if (opponent && realtime.match?.attempt) {
+      opponent.textContent =
+        `${realtime.opponentProgress} / ${realtime.match.attempt.questions.length}`;
+    }
+  }
+
+  function sendProgress(answeredCount) {
+    if (realtime.socket?.readyState === WebSocket.OPEN) {
+      realtime.socket.send(
+        JSON.stringify({ type: "progress", answered_count: answeredCount })
+      );
+    }
+  }
+
+  function renderActive(root, match) {
+    progressPanel(root, match);
+    const attempt = match.attempt;
+    if (attempt.status !== "active") {
+      const waiting = document.createElement("div");
+      waiting.className = "realtime-submitted";
+      waiting.innerHTML =
+        "<strong>答案已锁定</strong><p>等待对手提交。双方完成后才会公开答案和 Rating 变化。</p>";
+      root.append(waiting);
+      updateClock();
+      return;
+    }
+    const form = document.createElement("form");
+    form.className = "choice-list realtime-answer-form";
+    attempt.questions.forEach((question) => {
+      const field = document.createElement("label");
+      field.textContent = `${question.order}. ${question.prompt}`;
+      const input = document.createElement("input");
+      input.name = String(question.order);
+      input.inputMode = "decimal";
+      input.autocomplete = "off";
+      input.addEventListener("input", () => {
+        const answered = [...form.querySelectorAll("input")].filter(
+          (item) => item.value.trim()
+        ).length;
+        updateProgressUI(answered);
+        sendProgress(answered);
+      });
+      field.append(input);
+      form.append(field);
+    });
+    const submit = document.createElement("button");
+    submit.className = "primary-button";
+    submit.type = "submit";
+    submit.textContent = "提交并等待对手";
+    form.append(submit);
+    form.addEventListener("submit", async (event) => {
+      event.preventDefault();
+      submit.disabled = true;
+      const data = new FormData(form);
+      try {
+        realtime.match = await api(
+          `contests/attempts/${attempt.attempt_id}/submit/`,
+          {
+            method: "POST",
+            headers: { "Idempotency-Key": createIdempotencyKey() },
+            body: {
+              answers: attempt.questions.map((question) => ({
+                order: question.order,
+                answer: data.get(String(question.order)) || "",
+              })),
+            },
+          },
+        );
+        renderMatch();
+      } catch (error) {
+        showToast(error.message);
+        submit.disabled = false;
+      }
+    });
+    root.append(form);
+    updateClock();
+  }
+
+  function renderCompleted(root, match) {
+    const result = document.createElement("section");
+    result.className = `realtime-result result-${match.result.winner}`;
+    const outcome = document.createElement("strong");
+    outcome.textContent =
+      match.result.winner === "self"
+        ? "获胜"
+        : match.result.winner === "opponent"
+        ? "本局惜败"
+        : "平局";
+    const score = document.createElement("p");
+    score.textContent =
+      `你 ${match.attempt.score} 分 · ${match.opponent.score} 分 ${match.opponent.nickname}`;
+    const rating = document.createElement("b");
+    const sign = match.result.rating_delta > 0 ? "+" : "";
+    rating.textContent =
+      `Rating ${sign}${match.result.rating_delta} → ${match.result.rating_after}`;
+    result.append(outcome, score, rating);
+    root.append(result);
+
+    const review = document.createElement("div");
+    review.className = "realtime-review";
+    match.attempt.questions.forEach((question) => {
+      const item = document.createElement("article");
+      const title = document.createElement("b");
+      title.textContent = `${question.order}. ${question.prompt}`;
+      const answer = document.createElement("p");
+      answer.textContent =
+        `你的答案：${question.submitted_answer || "未作答"} · 正确答案：${question.correct_answer}`;
+      const explanation = document.createElement("small");
+      explanation.textContent = question.explanation || "";
+      item.className = question.is_correct ? "correct" : "incorrect";
+      item.append(title, answer, explanation);
+      review.append(item);
+    });
+    root.append(review);
+  }
+
+  function renderMatch() {
+    const root = document.querySelector("#experience-content");
+    const match = realtime.match;
+    root.replaceChildren();
+    header(root, match);
+    if (match.status === "waiting") renderWaiting(root, match);
+    else if (match.status === "active") renderActive(root, match);
+    else if (match.status === "completed") renderCompleted(root, match);
+    else {
+      const message = document.createElement("p");
+      message.className = "scene";
+      message.textContent = "这场匹配已取消或联机码已过期。";
+      root.append(message);
+    }
+  }
+
+  function currentRealtimeContest() {
+    return state.contests.find(
+      (contest) => contest.kind === "realtime" && contest.track === state.track
+    );
+  }
+
+  async function startRandom(contest) {
+    const match = await api(`contests/${contest.slug}/matchmaking/`, {
+      method: "POST",
+      body: {},
+    });
+    openMatch(match);
+  }
+
+  async function createChallenge() {
+    if (!requireAuth()) return;
+    const contest = currentRealtimeContest();
+    if (!contest) {
+      showToast("当前赛道没有可用的实时比赛");
+      return;
+    }
+    try {
+      const match = await api(`contests/${contest.slug}/challenges/`, {
+        method: "POST",
+        body: {},
+      });
+      openMatch(match);
+    } catch (error) {
+      showToast(error.message);
+    }
+  }
+
+  async function joinChallenge(event) {
+    event.preventDefault();
+    if (!requireAuth()) return;
+    const input = document.querySelector("#challenge-code-input");
+    const challengeCode = input.value.trim().toUpperCase();
+    if (challengeCode.length !== 6) {
+      showToast("请输入 6 位联机码");
+      return;
+    }
+    try {
+      const match = await api("contests/challenges/join/", {
+        method: "POST",
+        body: { challenge_code: challengeCode },
+      });
+      input.value = "";
+      openMatch(match);
+    } catch (error) {
+      showToast(error.message);
+    }
+  }
+
+  function init() {
+    document
+      .querySelector("#challenge-create")
+      .addEventListener("click", createChallenge);
+    document
+      .querySelector("#challenge-join-form")
+      .addEventListener("submit", joinChallenge);
+    document
+      .querySelector("#challenge-code-input")
+      .addEventListener("input", (event) => {
+        event.target.value = event.target.value
+          .toUpperCase()
+          .replace(/[^ABCDEFGHJKLMNPQRSTUVWXYZ23456789]/g, "")
+          .slice(0, 6);
+      });
+  }
+
+  function reset() {
+    stopTimers();
+    closeSocket();
+    realtime.match = null;
+    realtime.opponentProgress = 0;
+  }
+
+  window.HuluRealtime = { init, startRandom, refreshMatch, reset };
+})();

backend/templates/index.html

@@ -89,6 +89,20 @@
         <div class="track-switch" id="track-switch">
           <button class="active" data-track="standard">标准</button><button data-track="beginner">入门</button><button data-track="advanced">进阶</button>
         </div>
+        <section class="challenge-panel">
+          <div>
+            <span class="kicker">FRIEND CHALLENGE</span>
+            <h2>联机码约战</h2>
+            <p>创建 6 位联机码发给朋友，或输入朋友的联机码加入同一场对局。</p>
+          </div>
+          <div class="challenge-actions">
+            <button id="challenge-create" class="primary-button">创建当前赛道约战</button>
+            <form id="challenge-join-form">
+              <input id="challenge-code-input" maxlength="6" autocomplete="off" placeholder="输入 6 位联机码" aria-label="联机码">
+              <button class="dark-button" type="submit">加入约战</button>
+            </form>
+          </div>
+        </section>
         <div id="contest-list" class="content-grid loading">正在读取比赛…</div>
         <section class="math-games-section">
           <div class="section-heading">
@@ -305,6 +319,7 @@
   <div class="csrf-token">{% csrf_token %}</div>
   <script src="{% static 'js/toolbox.js' %}" defer></script>
   <script src="{% static 'js/games.js' %}" defer></script>
+  <script src="{% static 'js/realtime.js' %}" defer></script>
   <script src="{% static 'js/app.js' %}" defer></script>
 </body>
 </html>

docs/LOCAL_REALTIME_TEST.md

@@ -0,0 +1,132 @@
+# 本地实时 1v1 与联机码约战测试
+
+本指南用于在一台电脑上使用两个浏览器会话验证完整联机流程。
+
+## 1. 准备数据
+
+```bash
+make install
+make migrate
+make seed
+```
+
+种子数据会创建三个赛道的实时 1v1 比赛。本地邀请码为：
+
+```text
+HULU2026
+```
+
+## 2. 使用 ASGI 启动
+
+实时比赛依赖 WebSocket。不要使用普通 WSGI 服务测试联机。
+
+```bash
+make run-asgi
+```
+
+访问：
+
+```text
+http://127.0.0.1:8000/
+```
+
+本地没有配置 `REDIS_URL` 时会使用进程内 Channel Layer，适合单进程开发测试。生产环境必须使用 Redis。
+
+### 一键端到端验证
+
+保持 `make run-asgi` 运行，另开终端执行：
+
+```bash
+.venv/bin/python scripts/test_realtime_local.py
+```
+
+脚本会临时创建两个本地账号，通过真实 HTTP Session 和两个真实 WebSocket 完成：
+
+```text
+创建联机码
+→ 第二位玩家加入
+→ matched 状态推送
+→ 答题进度同步
+→ 第一位提交且不泄露答案
+→ 第二位提交
+→ completed 推送
+→ 胜负、Rating 和解析检查
+```
+
+结束后脚本自动清理临时用户和比赛记录。
+
+## 3. 准备两个独立登录会话
+
+使用下列任一组合：
+
+- Chrome 普通窗口 + 无痕窗口
+- Chrome + Safari
+- 两个不同浏览器 Profile
+
+两个窗口分别使用邀请码 `HULU2026` 注册不同账号。不要在同一浏览器 Profile 的两个普通标签页登录不同账号，因为它们会共享 Session Cookie。
+
+## 4. 联机码约战
+
+玩家 A：
+
+1. 打开“比赛”。
+2. 选择双方约定的赛道。
+3. 点击“创建当前赛道约战”。
+4. 复制 6 位联机码。
+
+玩家 B：
+
+1. 打开“比赛”。
+2. 输入联机码。
+3. 点击“加入约战”。
+
+预期结果：
+
+- 玩家 A 无需再次点击，自动进入答题。
+- 双方显示相同题目和同一个倒计时。
+- 任一方填写答案时，另一方看到答题数量变化。
+- 第一位提交者只看到“答案已锁定”，看不到正确答案。
+- 双方提交或倒计时结束后，同时展示胜负、双方分数、Rating 变化和题目解析。
+
+## 5. 随机匹配
+
+双方选择同一赛道并点击“开始匹配”。
+
+预期结果：
+
+- 第一位玩家进入等待状态。
+- 第二位玩家加入后，第一位玩家自动进入答题。
+- 私人联机码房间不会被随机匹配玩家加入。
+
+## 6. 断线与超时
+
+验证以下场景：
+
+1. 答题时短暂关闭网络，再恢复。
+2. WebSocket 断开后页面仍每 2 秒轮询比赛状态。
+3. 关闭其中一个窗口，另一方等待倒计时结束。
+4. 服务端到时后将未提交 Attempt 标记为过期并完成结算。
+5. 等待中的联机码 10 分钟后失效。
+
+## 7. 排查
+
+浏览器开发者工具应看到：
+
+```text
+WS /ws/v1/contest/matches/<match_id>/
+GET /api/v1/contests/matches/<match_id>/
+```
+
+检查 Redis：
+
+```bash
+redis-cli ping
+```
+
+检查 ASGI：
+
+```bash
+curl http://127.0.0.1:8000/health/
+```
+
+生产 Nginx 必须为 `/ws/` 设置 `Upgrade` 和 `Connection` 请求头。详见 `docs/DEPLOYMENT.md`。

requirements-dev.txt

@@ -3,3 +3,4 @@ pytest==8.3.5
 pytest-django==4.11.1
 pytest-cov==6.2.1
 ruff==0.11.13
+daphne==4.1.2

scripts/test_realtime_local.py

@@ -0,0 +1,241 @@
+#!/usr/bin/env python3
+import argparse
+import asyncio
+import http.cookiejar
+import json
+import os
+import sys
+import time
+import urllib.error
+import urllib.request
+from pathlib import Path
+from urllib.parse import urlparse
+
+from django.db.models import Q
+
+PROJECT_ROOT = Path(__file__).resolve().parent.parent
+sys.path.insert(0, str(PROJECT_ROOT / "backend"))
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings")
+
+import django  # noqa: E402
+
+django.setup()
+
+from django.conf import settings  # noqa: E402
+from websockets.asyncio.client import connect  # noqa: E402
+
+from accounts.models import User  # noqa: E402
+from contest.models import (  # noqa: E402
+    Contest,
+    ContestAttempt,
+    RatingHistory,
+    RealtimeMatch,
+)
+
+
+class ApiClient:
+    def __init__(self, base_url):
+        self.base_url = base_url.rstrip("/")
+        self.cookies = http.cookiejar.CookieJar()
+        self.opener = urllib.request.build_opener(
+            urllib.request.HTTPCookieProcessor(self.cookies)
+        )
+
+    def request(self, method, path, payload=None, extra_headers=None):
+        body = json.dumps(payload).encode() if payload is not None else None
+        headers = {"Accept": "application/json"}
+        if body is not None:
+            headers["Content-Type"] = "application/json"
+        csrf_token = self.cookie("csrftoken")
+        if csrf_token:
+            headers["X-CSRFToken"] = csrf_token
+        headers.update(extra_headers or {})
+        request = urllib.request.Request(
+            f"{self.base_url}{path}",
+            data=body,
+            headers=headers,
+            method=method,
+        )
+        try:
+            with self.opener.open(request, timeout=10) as response:
+                content = response.read()
+                if not content:
+                    return None
+                if "application/json" in response.headers.get("Content-Type", ""):
+                    return json.loads(content)
+                return content.decode()
+        except urllib.error.HTTPError as exc:
+            content = exc.read().decode()
+            raise RuntimeError(f"{method} {path} -> HTTP {exc.code}: {content}") from exc
+
+    def get(self, path):
+        return self.request("GET", path)
+
+    def post(self, path, payload, extra_headers=None):
+        return self.request("POST", path, payload, extra_headers)
+
+    def cookie(self, name):
+        return next((item.value for item in self.cookies if item.name == name), "")
+
+    @property
+    def cookie_header(self):
+        return "; ".join(f"{item.name}={item.value}" for item in self.cookies)
+
+
+async def receive_until(websocket, event_type, reason=None):
+    for _ in range(10):
+        payload = json.loads(await asyncio.wait_for(websocket.recv(), timeout=5))
+        if payload.get("type") == event_type and (
+            reason is None or payload.get("reason") == reason
+        ):
+            return payload
+    raise RuntimeError(f"未收到 WebSocket 事件: type={event_type}, reason={reason}")
+
+
+def websocket_url(base_url, path):
+    parsed = urlparse(base_url)
+    scheme = "wss" if parsed.scheme == "https" else "ws"
+    return f"{scheme}://{parsed.netloc}{path}"
+
+
+async def run_flow(base_url, first_client, second_client, contest):
+    created = first_client.post(
+        f"/api/v1/contests/{contest.slug}/challenges/",
+        {},
+    )
+    code = created["challenge_code"]
+    print(f"[1/7] 玩家 A 创建联机码: {code}")
+
+    async with connect(
+        websocket_url(base_url, created["websocket_path"]),
+        additional_headers={"Cookie": first_client.cookie_header},
+        open_timeout=10,
+    ) as first_socket:
+        await receive_until(first_socket, "connected")
+        joined = second_client.post(
+            "/api/v1/contests/challenges/join/",
+            {"challenge_code": code},
+        )
+        await receive_until(first_socket, "state", "matched")
+        print("[2/7] 玩家 B 加入，玩家 A 收到 matched 事件")
+
+        first_state = first_client.get(
+            f"/api/v1/contests/matches/{created['match_id']}/"
+        )
+        if first_state["status"] != "active":
+            raise RuntimeError("匹配后状态不是 active")
+
+        async with connect(
+            websocket_url(base_url, joined["websocket_path"]),
+            additional_headers={"Cookie": second_client.cookie_header},
+            open_timeout=10,
+        ) as second_socket:
+            await receive_until(second_socket, "connected")
+            await first_socket.send(
+                json.dumps({"type": "progress", "answered_count": 1})
+            )
+            progress = await receive_until(second_socket, "progress")
+            if progress["answered_count"] != 1:
+                raise RuntimeError("答题进度同步失败")
+            print("[3/7] 两个 WebSocket 已连接，答题进度同步成功")
+
+            first_attempt = first_state["attempt"]
+            second_attempt = joined["attempt"]
+            first_answers = [
+                {"order": item["order"], "answer": "0"}
+                for item in first_attempt["questions"]
+            ]
+            second_answers = [
+                {"order": item["order"], "answer": "0"}
+                for item in second_attempt["questions"]
+            ]
+            first_result = first_client.post(
+                f"/api/v1/contests/attempts/{first_attempt['attempt_id']}/submit/",
+                {"answers": first_answers},
+                {"Idempotency-Key": f"local-first-{created['match_id']}"},
+            )
+            if first_result["status"] != "active":
+                raise RuntimeError("首位玩家提交后比赛不应立即完成")
+            if "correct_answer" in first_result["attempt"]["questions"][0]:
+                raise RuntimeError("首位玩家提前看到了正确答案")
+            await receive_until(second_socket, "state", "submitted")
+            print("[4/7] 玩家 A 提交后答案锁定，未提前泄露正确答案")
+
+            second_result = second_client.post(
+                f"/api/v1/contests/attempts/{second_attempt['attempt_id']}/submit/",
+                {"answers": second_answers},
+                {"Idempotency-Key": f"local-second-{created['match_id']}"},
+            )
+            if second_result["status"] != "completed":
+                raise RuntimeError("双方提交后比赛没有完成")
+            await receive_until(first_socket, "state", "completed")
+            print("[5/7] 玩家 B 提交后双方收到 completed 事件")
+
+            final_state = first_client.get(
+                f"/api/v1/contests/matches/{created['match_id']}/"
+            )
+            if "correct_answer" not in final_state["attempt"]["questions"][0]:
+                raise RuntimeError("完成后没有公开题目解析")
+            if final_state["result"] is None:
+                raise RuntimeError("完成后没有胜负与 Rating 结果")
+            print("[6/7] 最终比分、Rating 和题目解析均可读取")
+    print("[7/7] 本地联机码约战端到端测试通过")
+
+
+def cleanup(users):
+    user_ids = [user.id for user in users]
+    matches = RealtimeMatch.objects.filter(
+        Q(player_one_id__in=user_ids) | Q(player_two_id__in=user_ids)
+    )
+    match_ids = list(matches.values_list("id", flat=True))
+    ContestAttempt.objects.filter(
+        Q(user_id__in=user_ids) | Q(match_id__in=match_ids)
+    ).delete()
+    RatingHistory.objects.filter(match_id__in=match_ids).delete()
+    matches.delete()
+    User.objects.filter(id__in=user_ids).delete()
+
+
+def main():
+    parser = argparse.ArgumentParser(description="本地实时联机码约战端到端测试")
+    parser.add_argument("--base-url", default="http://127.0.0.1:8000")
+    args = parser.parse_args()
+    hostname = urlparse(args.base_url).hostname
+    if not settings.DEBUG or hostname not in {"127.0.0.1", "localhost"}:
+        raise RuntimeError("该脚本只允许在 DEBUG=true 的本机地址运行")
+    stamp = str(int(time.time() * 1000))
+    password = "LocalRealtime2026!"
+    users = [
+        User.objects.create_user(
+            username=f"local_ws_a_{stamp}",
+            password=password,
+            nickname="本地联机 A",
+        ),
+        User.objects.create_user(
+            username=f"local_ws_b_{stamp}",
+            password=password,
+            nickname="本地联机 B",
+        ),
+    ]
+    try:
+        contest = Contest.objects.filter(
+            kind=Contest.Kind.REALTIME,
+            status=Contest.Status.PUBLISHED,
+            track="standard",
+        ).first()
+        if contest is None:
+            raise RuntimeError("缺少标准赛道实时比赛，请先执行 make seed")
+        clients = [ApiClient(args.base_url), ApiClient(args.base_url)]
+        for client, user in zip(clients, users):
+            client.get("/")
+            client.post(
+                "/api/v1/accounts/login/",
+                {"username": user.username, "password": password},
+            )
+        asyncio.run(run_flow(args.base_url, clients[0], clients[1], contest))
+    finally:
+        cleanup(users)
+
+
+if __name__ == "__main__":
+    main()