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feat: 流式输出消息超长时自动分段发送，消息长度限制纳入渠道能力管理

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jxxghp
2026-03-26 01:56:11 +08:00
parent a6f16dcf8f
commit 4b4b808b76
2 changed files with 97 additions and 21 deletions
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16
app/schemas/message.py
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@@ -194,6 +194,8 @@ class ChannelCapabilities:
max_buttons_per_row: int = 5
max_button_rows: int = 10
max_button_text_length: int = 30
# 单条消息最大长度（0 表示不限制），用于流式输出时自动分段
max_message_length: int = 0
fallback_enabled: bool = True
@@ -219,6 +221,8 @@ class ChannelCapabilityManager:
max_buttons_per_row=4,
max_button_rows=10,
max_button_text_length=30,
# Telegram 文本消息限制 4096 字符，预留空间给 MarkdownV2 转义和标题
max_message_length=3500,
),
MessageChannel.Wechat: ChannelCapabilities(
channel=MessageChannel.Wechat,
@@ -244,6 +248,8 @@ class ChannelCapabilityManager:
max_buttons_per_row=3,
max_button_rows=8,
max_button_text_length=25,
# Slack 消息限制 40000 字符，预留空间给格式化
max_message_length=39000,
fallback_enabled=True,
),
MessageChannel.Discord: ChannelCapabilities(
@@ -260,6 +266,8 @@ class ChannelCapabilityManager:
max_buttons_per_row=5,
max_button_rows=5,
max_button_text_length=80,
# Discord 消息限制 2000 字符
max_message_length=1800,
fallback_enabled=True,
),
MessageChannel.SynologyChat: ChannelCapabilities(
@@ -376,6 +384,14 @@ class ChannelCapabilityManager:
channel_caps = cls.get_capabilities(channel)
return channel_caps.max_button_text_length if channel_caps else 20
@classmethod
def get_max_message_length(cls, channel: MessageChannel) -> int:
"""
获取单条消息最大长度（0 表示不限制）
"""
channel_caps = cls.get_capabilities(channel)
return channel_caps.max_message_length if channel_caps else 0
@classmethod
def should_use_fallback(cls, channel: MessageChannel) -> bool:
"""