modify: auth插件拆分，将token签发部分交给网关

auth_oauth/router/github.py

@@ -0,0 +1,86 @@
+"""GitHub OAuth 授权码模式端点（SPA 友好的 JSON 流程）。
+
+流程：前端调 authorize 拿 authorize_url → 浏览器跳转 GitHub →
+GitHub 回跳前端页（带 code+state）→ 前端调 callback 换平台 token。
+"""
+import logging
+import secrets
+from urllib.parse import urlencode
+
+from chongming_worker import rpc_method
+
+from ..models import GithubAuthorizeGetResponse, GithubCallbackPostRequest, LoginPostResponse
+from ..providers import github as github_provider
+from .. import store
+
+logger = logging.getLogger("plugins.auth_oauth.github")
+
+_STATE_TTL = 300  # state 有效期（秒），一次性消费防 CSRF
+
+
+@rpc_method(
+    subject="auth_oauth.github_authorize",
+    method="GET",
+    summary="GitHub 授权登录：生成授权跳转 URL（state 存缓存防 CSRF）",
+)
+async def github_authorize() -> GithubAuthorizeGetResponse:
+    from ..global_var import cache, plugin_config
+
+    gh = plugin_config.get("github") or {}
+    client_id = gh.get("client_id", "")
+    if not client_id or client_id.startswith("your-"):
+        return GithubAuthorizeGetResponse(
+            result="fail", authorize_url="",
+            state="GitHub OAuth 未配置（config/workers/auth_oauth/config.toml 的 [workers.config.github]）",
+        )
+
+    state = secrets.token_urlsafe(24)
+    cache.set(f"auth_oauth:state:{state}", "1", expire=_STATE_TTL)
+
+    params = urlencode({
+        "client_id": client_id,
+        "redirect_uri": gh.get("redirect_uri", ""),
+        "scope": gh.get("scope", "read:user user:email"),
+        "state": state,
+    })
+    return GithubAuthorizeGetResponse(
+        result="success",
+        authorize_url=f"https://github.com/login/oauth/authorize?{params}",
+        state=state,
+    )
+
+
+@rpc_method(
+    subject="auth_oauth.github_callback",
+    method="POST",
+    summary="GitHub 授权回调：校验 state、换取用户信息，find-or-create 后签发平台 token",
+)
+async def github_callback(req: GithubCallbackPostRequest) -> LoginPostResponse:
+    from ..global_var import cache, db, plugin_config
+
+    if db is None or cache is None:
+        return store.fail_response("插件未初始化")
+
+    # state 一次性消费（防 CSRF / 重放）
+    state_key = f"auth_oauth:state:{req.state}"
+    if not cache.get(state_key):
+        return store.fail_response("state 无效或已过期，请重新发起授权")
+    cache.delete(state_key)
+
+    gh = plugin_config.get("github") or {}
+    try:
+        access_token = await github_provider.exchange_code(
+            gh.get("client_id", ""), gh.get("client_secret", ""),
+            req.code, gh.get("redirect_uri", ""),
+        )
+        profile = await github_provider.fetch_user(access_token)
+    except RuntimeError as e:
+        logger.warning("GitHub 回调失败: %s", e)
+        return store.fail_response(str(e))
+
+    user, message = await store.find_or_create_user(
+        db, "github", profile["uid"], profile
+    )
+    if user is None:
+        return store.fail_response(message)
+    return store.issue_login_response(user)