fix(reddit): detect auth status in doctor check

agent_reach/channels/reddit.py

@@ -1,10 +1,19 @@
 # -*- coding: utf-8 -*-
-"""Reddit — search and read via rdt-cli (public-clis/rdt-cli)."""
+"""Reddit — search and read via rdt-cli (public-clis/rdt-cli).
 
+NOTE: Reddit requires authentication since 2024. All API requests
+(including public subreddit reads) return HTTP 403 without a valid
+session cookie. Run `rdt login` after installation to authenticate.
+"""
+
+import json
 import shutil
 import subprocess
+
 from .base import Channel
 
+_CREDENTIAL_FILE = "~/.config/rdt-cli/credential.json"
+
 
 class RedditChannel(Channel):
     name = "reddit"
@@ -14,18 +23,54 @@ class RedditChannel(Channel):
 
     def can_handle(self, url: str) -> bool:
         from urllib.parse import urlparse
+
         d = urlparse(url).netloc.lower()
         return "reddit.com" in d or "redd.it" in d
 
     def check(self, config=None):
         rdt = shutil.which("rdt")
-        if rdt:
-            return "ok", (
-                "rdt-cli 可用（搜索帖子、阅读全文、查看评论，无需登录）"
+        if not rdt:
+            return "off", (
+                "需要安装 rdt-cli（推荐使用最新版 v0.4.2+）：\n"
+                "  pip install 'rdt-cli>=0.4.2'\n"
+                "或：\n"
+                "  uv tool install rdt-cli\n"
+                "最新源码：https://github.com/public-clis/rdt-cli\n"
+                "安装后运行 `rdt login` 登录（需先在浏览器登录 reddit.com）"
+            )
+
+        try:
+            r = subprocess.run(
+                [rdt, "status", "--json"],
+                capture_output=True,
+                encoding="utf-8",
+                errors="replace",
+                timeout=10,
             )
-        return "off", (
-            "需要安装 rdt-cli：\n"
-            "  pipx install rdt-cli\n"
-            "或：\n"
-            "  uv tool install rdt-cli"
-        )
+            data = json.loads(r.stdout or "{}")
+            authenticated = data.get("data", {}).get("authenticated", False)
+            username = data.get("data", {}).get("username") or ""
+
+            if authenticated:
+                suffix = f"（已登录：{username}）" if username else ""
+                return "ok", (f"rdt-cli 可用{suffix}（搜索帖子、阅读全文、查看评论）")
+
+            return "warn", (
+                "rdt-cli 已安装但未登录。Reddit 自 2024 年起要求认证，"
+                "未登录时所有请求均返回 403。\n\n"
+                "方法一（自动）：运行 `rdt login`\n"
+                "  先在浏览器登录 reddit.com，再运行此命令自动提取 Cookie。\n\n"
+                "方法二（手动，适用于 Chrome/Edge 127+ 无法自动提取时）：\n"
+                "  1. Chrome 应用商店安装 Cookie-Editor 扩展：\n"
+                "     https://chromewebstore.google.com/detail/cookie-editor/hlkenndednhfkekhgcdicdfddnkalmdm\n"
+                "  2. 在浏览器打开 reddit.com（确保已登录）\n"
+                "  3. 点击 Cookie-Editor 图标，找到 `reddit_session`，复制其 Value\n"
+                f"  4. 将以下内容写入 {_CREDENTIAL_FILE}：\n"
+                '     {"cookies": {"reddit_session": "<粘贴 Value>"}, '
+                '"source": "manual", "username": "<你的用户名>", '
+                '"modhash": null, "saved_at": 0, "last_verified_at": null}\n\n'
+                "验证：`rdt status --json` 确认 authenticated: true"
+            )
+
+        except (json.JSONDecodeError, FileNotFoundError, subprocess.TimeoutExpired):
+            return "warn", "rdt-cli 已安装但状态检查失败，运行 `rdt status` 查看详情"

tests/test_channels.py

@@ -7,9 +7,9 @@
 from urllib.error import URLError
 
 from agent_reach.channels import get_all_channels, get_channel
+from agent_reach.channels.v2ex import V2EXChannel
 from agent_reach.channels.xiaohongshu import XiaoHongShuChannel
 from agent_reach.channels.xueqiu import XueqiuChannel
-from agent_reach.channels.v2ex import V2EXChannel
 
 
 class TestChannelRegistry:
@@ -223,8 +223,6 @@ def test_get_topic_returns_detail_and_replies(self, monkeypatch):
             },
         ]
 
-        call_count = {"n": 0}
-
         class FakeResponse:
             def __init__(self, payload):
                 self._payload = payload
@@ -648,6 +646,72 @@ def fake_open(req, timeout=None):
         assert "agent-reach" not in captured["ua"]
 
 
+class TestRedditChannel:
+    def test_reports_off_when_not_installed(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: None)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "off"
+        assert "rdt-cli" in msg
+        assert "public-clis/rdt-cli" in msg
+
+    def test_reports_ok_when_authenticated(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/rdt")
+        fake_output = json.dumps({
+            "ok": True,
+            "schema_version": "1",
+            "data": {"authenticated": True, "username": "testuser", "cookie_count": 1},
+        })
+
+        def fake_run(cmd, **kwargs):
+            return subprocess.CompletedProcess(cmd, 0, fake_output, "")
+
+        monkeypatch.setattr(subprocess, "run", fake_run)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "ok"
+        assert "testuser" in msg
+
+    def test_reports_warn_when_not_authenticated(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/rdt")
+        fake_output = json.dumps({
+            "ok": True,
+            "schema_version": "1",
+            "data": {"authenticated": False, "username": None, "cookie_count": 0},
+        })
+
+        def fake_run(cmd, **kwargs):
+            return subprocess.CompletedProcess(cmd, 0, fake_output, "")
+
+        monkeypatch.setattr(subprocess, "run", fake_run)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "warn"
+        assert "403" in msg
+        assert "rdt login" in msg
+        assert "Cookie-Editor" in msg
+        assert "chromewebstore.google.com" in msg
+
+    def test_reports_warn_when_status_check_fails(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/rdt")
+
+        def fake_run(cmd, **kwargs):
+            return subprocess.CompletedProcess(cmd, 1, "not valid json{{{", "")
+
+        monkeypatch.setattr(subprocess, "run", fake_run)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "warn"
+
+    def test_can_handle_reddit_urls(self):
+        from agent_reach.channels.reddit import RedditChannel
+        ch = RedditChannel()
+        assert ch.can_handle("https://www.reddit.com/r/python/comments/abc123/")
+        assert ch.can_handle("https://redd.it/abc123")
+        assert not ch.can_handle("https://github.com/user/repo")
+        assert not ch.can_handle("https://v2ex.com/t/123")
+
+
 class TestXiaoHongShuChannel:
     def test_reports_ok_when_cli_authenticated(self, monkeypatch):
         monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/xhs")