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fix(discord): forum channel media + polish

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Extend forum support from PR #10145:

- REST path (_send_discord): forum thread creation now uploads media
  files as multipart attachments on the starter message in a single
  call. Previously media files were silently dropped on the forum
  path.
- Websocket media paths (_send_file_attachment, send_voice, send_image,
  send_animation — covers send_image_file, send_video, send_document
  transitively): forum channels now go through a new _forum_post_file
  helper that creates a thread with the file as starter content,
  instead of failing via channel.send(file=...) which forums reject.
- _send_to_forum chunk follow-up failures are collected into
  raw_response['warnings'] so partial-send outcomes surface.
- Process-local probe cache (_DISCORD_CHANNEL_TYPE_PROBE_CACHE) avoids
  GET /channels/{id} on every uncached send after the first.
- Dedup of TestSendDiscordMedia that the PR merge-resolution left
  behind.
- Docs: Forum Channels section under website/docs/user-guide/messaging/discord.md.

Tests: 117 passed (22 new for forum+media, probe cache, warnings).
This commit is contained in:
Teknium 2026-04-17 19:36:19 -07:00 • committed by Teknium
parent e5333e793c
commit 607be54a24
5 changed files with 540 additions and 186 deletions
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115
gateway/platforms/discord.py
View file

@ -957,7 +957,9 @@ class DiscordAdapter(BasePlatformAdapter):
Forum channels (type 15) don't support direct messages. Instead we
POST to /channels/{forum_id}/threads with a thread name derived from
the first line of the message.
the first line of the message. Any follow-up chunk failures are
reported in ``raw_response['warnings']`` so the caller can surface
partial-send issues.
"""
from tools.send_message_tool import _derive_forum_thread_name
@ -982,19 +984,86 @@ class DiscordAdapter(BasePlatformAdapter):
starter_msg = getattr(thread, "message", None)
message_id = str(getattr(starter_msg, "id", thread_id)) if starter_msg else thread_id
# Send remaining chunks into the newly created thread.
# Send remaining chunks into the newly created thread. Track any
# per-chunk failures so the caller sees partial-send outcomes.
message_ids = [message_id]
warnings: list[str] = []
for chunk in chunks[1:]:
try:
msg = await thread_channel.send(content=chunk)
message_ids.append(str(msg.id))
except Exception as e:
logger.warning("[%s] Failed to send follow-up chunk to forum thread %s: %s", self.name, thread_id, e)
warning = f"Failed to send follow-up chunk to forum thread {thread_id}: {e}"
logger.warning("[%s] %s", self.name, warning)
warnings.append(warning)
raw_response: Dict[str, Any] = {"message_ids": message_ids, "thread_id": thread_id}
if warnings:
raw_response["warnings"] = warnings
return SendResult(
success=True,
message_id=message_ids[0],
raw_response={"message_ids": message_ids, "thread_id": thread_id},
raw_response=raw_response,
)
async def _forum_post_file(
self,
forum_channel: Any,
*,
thread_name: Optional[str] = None,
content: str = "",
file: Any = None,
files: Optional[list] = None,
) -> SendResult:
"""Create a forum thread whose starter message carries file attachments.
Used by the send_voice / send_image_file / send_document paths when
the target channel is a forum (type 15). ``create_thread`` on a
ForumChannel accepts the same file/files/content kwargs as
``channel.send``, creating the thread and starter message atomically.
"""
from tools.send_message_tool import _derive_forum_thread_name
if not thread_name:
# Prefer the text content, fall back to the first attached
# filename, fall back to the generic default.
hint = content or ""
if not hint.strip():
if file is not None:
hint = getattr(file, "filename", "") or ""
elif files:
hint = getattr(files[0], "filename", "") or ""
thread_name = _derive_forum_thread_name(hint) if hint.strip() else "New Post"
kwargs: Dict[str, Any] = {"name": thread_name}
if content:
kwargs["content"] = content
if file is not None:
kwargs["file"] = file
if files:
kwargs["files"] = files
try:
thread = await forum_channel.create_thread(**kwargs)
except Exception as e:
logger.error(
"[%s] Failed to create forum thread with file in %s: %s",
self.name,
getattr(forum_channel, "id", "?"),
e,
)
return SendResult(success=False, error=f"Forum thread creation failed: {e}")
thread_channel = thread if hasattr(thread, "send") else getattr(thread, "thread", None)
thread_id = str(getattr(thread_channel, "id", getattr(thread, "id", "")))
starter_msg = getattr(thread, "message", None)
message_id = str(getattr(starter_msg, "id", thread_id)) if starter_msg else thread_id
return SendResult(
success=True,
message_id=message_id,
raw_response={"thread_id": thread_id},
)
async def edit_message(
@ -1027,7 +1096,11 @@ class DiscordAdapter(BasePlatformAdapter):
caption: Optional[str] = None,
file_name: Optional[str] = None,
) -> SendResult:
"""Send a local file as a Discord attachment."""
"""Send a local file as a Discord attachment.
Forum channels (type 15) get a new thread whose starter message
carries the file — they reject direct POST /messages.
"""
if not self._client:
return SendResult(success=False, error="Not connected")
@ -1040,6 +1113,12 @@ class DiscordAdapter(BasePlatformAdapter):
filename = file_name or os.path.basename(file_path)
with open(file_path, "rb") as fh:
file = discord.File(fh, filename=filename)
if self._is_forum_parent(channel):
return await self._forum_post_file(
channel,
content=(caption or "").strip(),
file=file,
)
msg = await channel.send(content=caption if caption else None, file=file)
return SendResult(success=True, message_id=str(msg.id))
@ -1088,6 +1167,18 @@ class DiscordAdapter(BasePlatformAdapter):
with open(audio_path, "rb") as f:
file_data = f.read()
# Forum channels (type 15) reject direct POST /messages — the
# native voice flag path also targets /messages so it would fail
# too. Create a thread post with the audio as the starter
# attachment instead.
if self._is_forum_parent(channel):
forum_file = discord.File(io.BytesIO(file_data), filename=filename)
return await self._forum_post_file(
channel,
content=(caption or "").strip(),
file=forum_file,
)
# Try sending as a native voice message via raw API (flags=8192).
try:
import base64
@ -1540,6 +1631,13 @@ class DiscordAdapter(BasePlatformAdapter):
import io
file = discord.File(io.BytesIO(image_data), filename=f"image.{ext}")
if self._is_forum_parent(channel):
return await self._forum_post_file(
channel,
content=(caption or "").strip(),
file=file,
)
msg = await channel.send(
content=caption if caption else None,
file=file,
@ -1602,6 +1700,13 @@ class DiscordAdapter(BasePlatformAdapter):
import io
file = discord.File(io.BytesIO(animation_data), filename="animation.gif")
if self._is_forum_parent(channel):
return await self._forum_post_file(
channel,
content=(caption or "").strip(),
file=file,
)
msg = await channel.send(
content=caption if caption else None,
file=file,

110
tests/gateway/test_discord_send.py
View file

@ -276,3 +276,113 @@ async def test_send_to_forum_create_thread_failure():
assert result.success is False
assert "rate limited" in result.error
# ---------------------------------------------------------------------------
# Forum follow-up chunk failure reporting + media on forum paths
# ---------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_send_to_forum_follow_up_chunk_failures_collected_as_warnings():
"""Partial-send chunk failures surface in raw_response['warnings']."""
adapter = DiscordAdapter(PlatformConfig(enabled=True, token="***"))
adapter.MAX_MESSAGE_LENGTH = 20
chunk_msg_1 = SimpleNamespace(id=500)
# Every follow-up chunk fails — we should collect a warning per failure
thread_ch = SimpleNamespace(
id=555,
send=AsyncMock(side_effect=Exception("rate limited")),
)
thread = SimpleNamespace(id=555, message=chunk_msg_1, thread=thread_ch)
forum_channel = _discord_mod.ForumChannel()
forum_channel.id = 999
forum_channel.name = "ideas"
forum_channel.create_thread = AsyncMock(return_value=thread)
adapter._client = SimpleNamespace(
get_channel=lambda _chat_id: forum_channel,
fetch_channel=AsyncMock(),
)
# Long enough to produce multiple chunks
result = await adapter.send("999", "A" * 60)
# Starter message (first chunk) was delivered via create_thread, so send is
# successful overall — but follow-up chunks all failed and are reported.
assert result.success is True
assert result.message_id == "500"
warnings = (result.raw_response or {}).get("warnings") or []
assert len(warnings) >= 1
assert all("rate limited" in w for w in warnings)
@pytest.mark.asyncio
async def test_forum_post_file_creates_thread_with_attachment():
"""_forum_post_file routes file-bearing sends to create_thread with file kwarg."""
adapter = DiscordAdapter(PlatformConfig(enabled=True, token="***"))
thread_ch = SimpleNamespace(id=777, send=AsyncMock())
thread = SimpleNamespace(id=777, message=SimpleNamespace(id=800), thread=thread_ch)
forum_channel = _discord_mod.ForumChannel()
forum_channel.id = 999
forum_channel.name = "ideas"
forum_channel.create_thread = AsyncMock(return_value=thread)
# discord.File is a real class; build a MagicMock that looks like one
fake_file = SimpleNamespace(filename="photo.png")
result = await adapter._forum_post_file(
forum_channel,
content="here is a photo",
file=fake_file,
)
assert result.success is True
assert result.message_id == "800"
forum_channel.create_thread.assert_awaited_once()
call_kwargs = forum_channel.create_thread.await_args.kwargs
assert call_kwargs["file"] is fake_file
assert call_kwargs["content"] == "here is a photo"
# Thread name derived from content's first line
assert call_kwargs["name"] == "here is a photo"
@pytest.mark.asyncio
async def test_forum_post_file_uses_filename_when_no_content():
"""Thread name falls back to file.filename when no content is provided."""
adapter = DiscordAdapter(PlatformConfig(enabled=True, token="***"))
thread = SimpleNamespace(id=1, message=SimpleNamespace(id=2), thread=SimpleNamespace(id=1, send=AsyncMock()))
forum_channel = _discord_mod.ForumChannel()
forum_channel.id = 10
forum_channel.name = "forum"
forum_channel.create_thread = AsyncMock(return_value=thread)
fake_file = SimpleNamespace(filename="voice-message.ogg")
result = await adapter._forum_post_file(forum_channel, content="", file=fake_file)
assert result.success is True
call_kwargs = forum_channel.create_thread.await_args.kwargs
# Content was empty → thread name derived from filename
assert call_kwargs["name"] == "voice-message.ogg"
@pytest.mark.asyncio
async def test_forum_post_file_creation_failure():
"""_forum_post_file returns a failed SendResult when create_thread raises."""
adapter = DiscordAdapter(PlatformConfig(enabled=True, token="***"))
forum_channel = _discord_mod.ForumChannel()
forum_channel.id = 999
forum_channel.create_thread = AsyncMock(side_effect=Exception("missing perms"))
result = await adapter._forum_post_file(
forum_channel,
content="hi",
file=SimpleNamespace(filename="x.png"),
)
assert result.success is False
assert "missing perms" in (result.error or "")

335
tests/tools/test_send_message_tool.py
View file

@ -1414,145 +1414,6 @@ class TestSendDiscordForum:
assert "403" in result["error"]
# ---------------------------------------------------------------------------
# Discord media attachment support
# ---------------------------------------------------------------------------
class TestSendDiscordMedia:
"""_send_discord uploads media files via multipart/form-data."""
@staticmethod
def _build_mock(response_status, response_data=None, response_text="error body"):
"""Build a properly-structured aiohttp mock chain."""
mock_resp = MagicMock()
mock_resp.status = response_status
mock_resp.json = AsyncMock(return_value=response_data or {"id": "msg123"})
mock_resp.text = AsyncMock(return_value=response_text)
mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
mock_resp.__aexit__ = AsyncMock(return_value=None)
mock_session = MagicMock()
mock_session.__aenter__ = AsyncMock(return_value=mock_session)
mock_session.__aexit__ = AsyncMock(return_value=None)
mock_session.post = MagicMock(return_value=mock_resp)
return mock_session, mock_resp
def test_text_and_media_sends_both(self, tmp_path):
"""Text message is sent first, then each media file as multipart."""
img = tmp_path / "photo.png"
img.write_bytes(b"\x89PNG fake image data")
mock_session, _ = self._build_mock(200, {"id": "msg999"})
with patch("aiohttp.ClientSession", return_value=mock_session):
result = asyncio.run(
_send_discord("tok", "111", "hello", media_files=[(str(img), False)])
)
assert result["success"] is True
assert result["message_id"] == "msg999"
# Two POSTs: one text JSON, one multipart upload
assert mock_session.post.call_count == 2
def test_media_only_skips_text_post(self, tmp_path):
"""When message is empty and media is present, text POST is skipped."""
img = tmp_path / "photo.png"
img.write_bytes(b"\x89PNG fake image data")
mock_session, _ = self._build_mock(200, {"id": "media_only"})
with patch("aiohttp.ClientSession", return_value=mock_session):
result = asyncio.run(
_send_discord("tok", "222", " ", media_files=[(str(img), False)])
)
assert result["success"] is True
# Only one POST: the media upload (text was whitespace-only)
assert mock_session.post.call_count == 1
def test_missing_media_file_collected_as_warning(self):
"""Non-existent media paths produce warnings but don't fail."""
mock_session, _ = self._build_mock(200, {"id": "txt_ok"})
with patch("aiohttp.ClientSession", return_value=mock_session):
result = asyncio.run(
_send_discord("tok", "333", "hello", media_files=[("/nonexistent/file.png", False)])
)
assert result["success"] is True
assert "warnings" in result
assert any("not found" in w for w in result["warnings"])
# Only the text POST was made, media was skipped
assert mock_session.post.call_count == 1
def test_media_upload_failure_collected_as_warning(self, tmp_path):
"""Failed media upload becomes a warning, text still succeeds."""
img = tmp_path / "photo.png"
img.write_bytes(b"\x89PNG fake image data")
# First call (text) succeeds, second call (media) returns 413
text_resp = MagicMock()
text_resp.status = 200
text_resp.json = AsyncMock(return_value={"id": "txt_ok"})
text_resp.__aenter__ = AsyncMock(return_value=text_resp)
text_resp.__aexit__ = AsyncMock(return_value=None)
media_resp = MagicMock()
media_resp.status = 413
media_resp.text = AsyncMock(return_value="Request Entity Too Large")
media_resp.__aenter__ = AsyncMock(return_value=media_resp)
media_resp.__aexit__ = AsyncMock(return_value=None)
mock_session = MagicMock()
mock_session.__aenter__ = AsyncMock(return_value=mock_session)
mock_session.__aexit__ = AsyncMock(return_value=None)
mock_session.post = MagicMock(side_effect=[text_resp, media_resp])
with patch("aiohttp.ClientSession", return_value=mock_session):
result = asyncio.run(
_send_discord("tok", "444", "hello", media_files=[(str(img), False)])
)
assert result["success"] is True
assert result["message_id"] == "txt_ok"
assert "warnings" in result
assert any("413" in w for w in result["warnings"])
def test_no_text_no_media_returns_error(self):
"""Empty text with no media returns error dict."""
mock_session, _ = self._build_mock(200)
with patch("aiohttp.ClientSession", return_value=mock_session):
result = asyncio.run(
_send_discord("tok", "555", "", media_files=[])
)
# Text is empty but media_files is empty, so text POST fires
# (the "skip text if media present" condition isn't met)
assert result["success"] is True
def test_multiple_media_files_uploaded_separately(self, tmp_path):
"""Each media file gets its own multipart POST."""
img1 = tmp_path / "a.png"
img1.write_bytes(b"img1")
img2 = tmp_path / "b.jpg"
img2.write_bytes(b"img2")
mock_session, _ = self._build_mock(200, {"id": "last"})
with patch("aiohttp.ClientSession", return_value=mock_session):
result = asyncio.run(
_send_discord("tok", "666", "hi", media_files=[
(str(img1), False), (str(img2), False)
])
)
assert result["success"] is True
# 1 text POST + 2 media POSTs = 3
assert mock_session.post.call_count == 3
# ---------------------------------------------------------------------------
# Tests for _send_to_platform with forum channel detection
# ---------------------------------------------------------------------------
class TestSendToPlatformDiscordForum:
"""_send_to_platform delegates forum detection to _send_discord."""
@ -1594,3 +1455,199 @@ class TestSendToPlatformDiscordForum:
assert result["success"] is True
_, call_kwargs = send_mock.await_args
assert call_kwargs["thread_id"] == "17585"
# ---------------------------------------------------------------------------
# Tests for _send_discord forum + media multipart upload
# ---------------------------------------------------------------------------
class TestSendDiscordForumMedia:
"""_send_discord uploads media as part of the starter message when the target is a forum."""
@staticmethod
def _build_thread_resp(thread_id="th_999", msg_id="msg_500"):
resp = MagicMock()
resp.status = 201
resp.json = AsyncMock(return_value={"id": thread_id, "message": {"id": msg_id}})
resp.text = AsyncMock(return_value="")
resp.__aenter__ = AsyncMock(return_value=resp)
resp.__aexit__ = AsyncMock(return_value=None)
return resp
def test_forum_with_media_uses_multipart(self, tmp_path, monkeypatch):
"""Forum + media → single multipart POST to /threads carrying the starter + files."""
from tools import send_message_tool as smt
img = tmp_path / "photo.png"
img.write_bytes(b"\x89PNGbytes")
monkeypatch.setattr(smt, "lookup_channel_type", lambda p, cid: "forum", raising=False)
monkeypatch.setattr(
"gateway.channel_directory.lookup_channel_type", lambda p, cid: "forum"
)
thread_resp = self._build_thread_resp()
session = MagicMock()
session.__aenter__ = AsyncMock(return_value=session)
session.__aexit__ = AsyncMock(return_value=None)
session.post = MagicMock(return_value=thread_resp)
post_calls = []
orig_post = session.post
def track_post(url, **kwargs):
post_calls.append({"url": url, "kwargs": kwargs})
return thread_resp
session.post = MagicMock(side_effect=track_post)
with patch("aiohttp.ClientSession", return_value=session):
result = asyncio.run(
_send_discord("tok", "forum_ch", "Thread title\nbody", media_files=[(str(img), False)])
)
assert result["success"] is True
assert result["thread_id"] == "th_999"
assert result["message_id"] == "msg_500"
# Exactly one POST — the combined thread-creation + attachments call
assert len(post_calls) == 1
assert post_calls[0]["url"].endswith("/threads")
# Multipart form, not JSON
assert post_calls[0]["kwargs"].get("data") is not None
assert post_calls[0]["kwargs"].get("json") is None
def test_forum_without_media_still_json_only(self, tmp_path, monkeypatch):
"""Forum + no media → JSON POST (no multipart overhead)."""
monkeypatch.setattr(
"gateway.channel_directory.lookup_channel_type", lambda p, cid: "forum"
)
thread_resp = self._build_thread_resp("t1", "m1")
session = MagicMock()
session.__aenter__ = AsyncMock(return_value=session)
session.__aexit__ = AsyncMock(return_value=None)
post_calls = []
def track_post(url, **kwargs):
post_calls.append({"url": url, "kwargs": kwargs})
return thread_resp
session.post = MagicMock(side_effect=track_post)
with patch("aiohttp.ClientSession", return_value=session):
result = asyncio.run(_send_discord("tok", "forum_ch", "Hello forum"))
assert result["success"] is True
assert len(post_calls) == 1
# JSON path, no multipart
assert post_calls[0]["kwargs"].get("json") is not None
assert post_calls[0]["kwargs"].get("data") is None
def test_forum_missing_media_file_collected_as_warning(self, tmp_path, monkeypatch):
"""Missing media files produce warnings but the thread is still created."""
monkeypatch.setattr(
"gateway.channel_directory.lookup_channel_type", lambda p, cid: "forum"
)
thread_resp = self._build_thread_resp()
session = MagicMock()
session.__aenter__ = AsyncMock(return_value=session)
session.__aexit__ = AsyncMock(return_value=None)
session.post = MagicMock(return_value=thread_resp)
with patch("aiohttp.ClientSession", return_value=session):
result = asyncio.run(
_send_discord(
"tok", "forum_ch", "hi",
media_files=[("/nonexistent/does-not-exist.png", False)],
)
)
assert result["success"] is True
assert "warnings" in result
assert any("not found" in w for w in result["warnings"])
# ---------------------------------------------------------------------------
# Tests for the process-local forum-probe cache
# ---------------------------------------------------------------------------
class TestForumProbeCache:
"""_DISCORD_CHANNEL_TYPE_PROBE_CACHE memoizes forum detection results."""
def setup_method(self):
from tools import send_message_tool as smt
smt._DISCORD_CHANNEL_TYPE_PROBE_CACHE.clear()
def test_cache_round_trip(self):
from tools.send_message_tool import (
_probe_is_forum_cached,
_remember_channel_is_forum,
)
assert _probe_is_forum_cached("xyz") is None
_remember_channel_is_forum("xyz", True)
assert _probe_is_forum_cached("xyz") is True
_remember_channel_is_forum("xyz", False)
assert _probe_is_forum_cached("xyz") is False
def test_probe_result_is_memoized(self, monkeypatch):
"""An API-probed channel type is cached so subsequent sends skip the probe."""
monkeypatch.setattr(
"gateway.channel_directory.lookup_channel_type", lambda p, cid: None
)
# First probe response: type=15 (forum)
probe_resp = MagicMock()
probe_resp.status = 200
probe_resp.json = AsyncMock(return_value={"type": 15})
probe_resp.__aenter__ = AsyncMock(return_value=probe_resp)
probe_resp.__aexit__ = AsyncMock(return_value=None)
thread_resp = MagicMock()
thread_resp.status = 201
thread_resp.json = AsyncMock(return_value={"id": "t1", "message": {"id": "m1"}})
thread_resp.__aenter__ = AsyncMock(return_value=thread_resp)
thread_resp.__aexit__ = AsyncMock(return_value=None)
probe_session = MagicMock()
probe_session.__aenter__ = AsyncMock(return_value=probe_session)
probe_session.__aexit__ = AsyncMock(return_value=None)
probe_session.get = MagicMock(return_value=probe_resp)
thread_session = MagicMock()
thread_session.__aenter__ = AsyncMock(return_value=thread_session)
thread_session.__aexit__ = AsyncMock(return_value=None)
thread_session.post = MagicMock(return_value=thread_resp)
# Two _send_discord calls: first does probe + thread-create; second should skip probe
from tools import send_message_tool as smt
sessions_created = []
def session_factory(**kwargs):
# Alternate: each new ClientSession() call returns a probe_session, thread_session pair
idx = len(sessions_created)
sessions_created.append(idx)
# Returns the same mocks; the real code opens a probe session then a thread session.
# Hand out probe_session if this is the first time called within _send_discord,
# otherwise thread_session.
if idx % 2 == 0:
return probe_session
return thread_session
with patch("aiohttp.ClientSession", side_effect=session_factory):
result1 = asyncio.run(_send_discord("tok", "ch1", "first"))
assert result1["success"] is True
assert smt._probe_is_forum_cached("ch1") is True
# Second call: cache hits, no new probe session needed. We need to only
# return thread_session now since probe is skipped.
sessions_created.clear()
with patch("aiohttp.ClientSession", return_value=thread_session):
result2 = asyncio.run(_send_discord("tok", "ch1", "second"))
assert result2["success"] is True
# Only one session opened (thread creation) — no probe session this time
# (verified by not raising from our side_effect exhaustion)

113
tools/send_message_tool.py
View file

@ -10,6 +10,7 @@ import json
import logging
import os
import re
from typing import Dict, Optional
import ssl
import time
@ -695,6 +696,20 @@ def _derive_forum_thread_name(message: str) -> str:
return first_line[:100]
# Process-local cache for Discord channel-type probes. Avoids re-probing the
# same channel on every send when the directory cache has no entry (e.g. fresh
# install, or channel created after the last directory build).
_DISCORD_CHANNEL_TYPE_PROBE_CACHE: Dict[str, bool] = {}
def _remember_channel_is_forum(chat_id: str, is_forum: bool) -> None:
_DISCORD_CHANNEL_TYPE_PROBE_CACHE[str(chat_id)] = bool(is_forum)
def _probe_is_forum_cached(chat_id: str) -> Optional[bool]:
return _DISCORD_CHANNEL_TYPE_PROBE_CACHE.get(str(chat_id))
async def _send_discord(token, chat_id, message, thread_id=None, media_files=None):
"""Send a single message via Discord REST API (no websocket client needed).
@ -703,14 +718,16 @@ async def _send_discord(token, chat_id, message, thread_id=None, media_files=Non
When thread_id is provided, the message is sent directly to that thread
via the /channels/{thread_id}/messages endpoint.
Forum channels (type 15) reject POST /messages — auto-create a thread
post instead via POST /channels/{id}/threads.
Channel type is resolved from the channel directory first; only falls
back to a GET /channels/{id} probe when the directory has no entry.
Media files are uploaded one-by-one via multipart/form-data after the
text message is sent (same pattern as Telegram).
Forum channels (type 15) reject POST /messages — a thread post is created
automatically via POST /channels/{id}/threads. Media files are uploaded
as multipart attachments on the starter message of the new thread.
Channel type is resolved from the channel directory first, then a
process-local probe cache, and only as a last resort with a live
GET /channels/{id} probe (whose result is memoized).
"""
try:
import aiohttp
@ -720,7 +737,11 @@ async def _send_discord(token, chat_id, message, thread_id=None, media_files=Non
from gateway.platforms.base import resolve_proxy_url, proxy_kwargs_for_aiohttp
_proxy = resolve_proxy_url(platform_env_var="DISCORD_PROXY")
_sess_kw, _req_kw = proxy_kwargs_for_aiohttp(_proxy)
headers = {"Authorization": f"Bot {token}", "Content-Type": "application/json"}
auth_headers = {"Authorization": f"Bot {token}"}
json_headers = {**auth_headers, "Content-Type": "application/json"}
media_files = media_files or []
last_data = None
warnings = []
# Thread endpoint: Discord threads are channels; send directly to the thread ID.
if thread_id:
@ -728,8 +749,8 @@ async def _send_discord(token, chat_id, message, thread_id=None, media_files=Non
else:
# Check if the target channel is a forum channel (type 15).
# Forum channels reject POST /messages — create a thread post instead.
# Try the channel directory first; fall back to an API probe only
# when the directory has no entry.
# Three-layer detection: directory cache → process-local probe
# cache → GET /channels/{id} probe (with result memoized).
_channel_type = None
try:
from gateway.channel_directory import lookup_channel_type
@ -740,28 +761,78 @@ async def _send_discord(token, chat_id, message, thread_id=None, media_files=Non
if _channel_type == "forum":
is_forum = True
elif _channel_type is not None:
# Known non-forum type — skip the probe.
is_forum = False
else:
cached = _probe_is_forum_cached(chat_id)
if cached is not None:
is_forum = cached
else:
is_forum = False
try:
info_url = f"https://discord.com/api/v10/channels/{chat_id}"
async with aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(total=15), **_sess_kw) as info_sess:
async with info_sess.get(info_url, headers=headers, **_req_kw) as info_resp:
async with info_sess.get(info_url, headers=json_headers, **_req_kw) as info_resp:
if info_resp.status == 200:
info = await info_resp.json()
is_forum = info.get("type") == 15
_remember_channel_is_forum(chat_id, is_forum)
except Exception:
logger.debug("Failed to probe channel type for %s", chat_id, exc_info=True)
if is_forum:
thread_name = _derive_forum_thread_name(message)
thread_url = f"https://discord.com/api/v10/channels/{chat_id}/threads"
async with aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(total=30), **_sess_kw) as session:
# Filter to readable media files up front so we can pick the
# right code path (JSON vs multipart) before opening a session.
valid_media = []
for media_path, _is_voice in media_files:
if not os.path.exists(media_path):
warning = f"Media file not found, skipping: {media_path}"
logger.warning(warning)
warnings.append(warning)
continue
valid_media.append(media_path)
async with aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(total=60), **_sess_kw) as session:
if valid_media:
# Multipart: payload_json + files[N] creates a forum
# thread with the starter message plus attachments in
# a single API call.
attachments_meta = [
{"id": str(idx), "filename": os.path.basename(path)}
for idx, path in enumerate(valid_media)
]
starter_message = {"content": message, "attachments": attachments_meta}
payload_json = json.dumps({"name": thread_name, "message": starter_message})
form = aiohttp.FormData()
form.add_field("payload_json", payload_json, content_type="application/json")
# Buffer file bytes up front — aiohttp's FormData can
# read lazily and we don't want handles closing under
# it on retry.
try:
for idx, media_path in enumerate(valid_media):
with open(media_path, "rb") as fh:
form.add_field(
f"files[{idx}]",
fh.read(),
filename=os.path.basename(media_path),
)
async with session.post(thread_url, headers=auth_headers, data=form, **_req_kw) as resp:
if resp.status not in (200, 201):
body = await resp.text()
return _error(f"Discord forum thread creation error ({resp.status}): {body}")
data = await resp.json()
except Exception as e:
return _error(_sanitize_error_text(f"Discord forum thread upload failed: {e}"))
else:
# No media — simple JSON POST creates the thread with
# just the text starter.
async with session.post(
thread_url,
headers=headers,
headers=json_headers,
json={
"name": thread_name,
"message": {"content": message},
@ -772,26 +843,26 @@ async def _send_discord(token, chat_id, message, thread_id=None, media_files=Non
body = await resp.text()
return _error(f"Discord forum thread creation error ({resp.status}): {body}")
data = await resp.json()
thread_id_created = data.get("id")
starter_msg_id = (data.get("message") or {}).get("id", thread_id_created)
return {
result = {
"success": True,
"platform": "discord",
"chat_id": chat_id,
"thread_id": thread_id_created,
"message_id": starter_msg_id,
}
if warnings:
result["warnings"] = warnings
return result
url = f"https://discord.com/api/v10/channels/{chat_id}/messages"
auth_headers = {"Authorization": f"Bot {token}"}
media_files = media_files or []
last_data = None
warnings = []
async with aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(total=30), **_sess_kw) as session:
# Send text message (skip if empty and media is present)
if message.strip() or not media_files:
headers = {**auth_headers, "Content-Type": "application/json"}
async with session.post(url, headers=headers, json={"content": message}, **_req_kw) as resp:
async with session.post(url, headers=json_headers, json={"content": message}, **_req_kw) as resp:
if resp.status not in (200, 201):
body = await resp.text()
return _error(f"Discord API error ({resp.status}): {body}")

11
website/docs/user-guide/messaging/discord.md
View file

@ -505,6 +505,17 @@ For the full setup and operational guide, see:
- [Voice Mode](/docs/user-guide/features/voice-mode)
- [Use Voice Mode with Hermes](/docs/guides/use-voice-mode-with-hermes)
## Forum Channels
Discord forum channels (type 15) don't accept direct messages — every post in a forum must be a thread. Hermes auto-detects forum channels and creates a new thread post whenever it needs to send there, so `send_message`, TTS, images, voice messages, and file attachments all work without special handling from the agent.
- **Thread name** is derived from the first line of the message (markdown heading prefix stripped, capped at 100 chars). When the message is attachment-only, the filename is used as the fallback thread name.
- **Attachments** ride along on the starter message of the new thread — no separate upload step, no partial sends.
- **One call, one thread**: each forum send creates a new thread. Successive sends to the same forum will therefore produce separate threads.
- **Detection is three-layered**: the channel directory cache first, a process-local probe cache second, and a live `GET /channels/{id}` probe as a last resort (whose result is then memoized for the life of the process).
Refreshing the directory (`/channels refresh` on platforms that expose it, or a gateway restart) populates the cache with any forum channels created after the bot started.
## Troubleshooting
### Bot is online but not responding to messages