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feat: 抹除 Anthropic OAuth 请求中客户端 dateline 隐写指纹

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对 /v1/messages 转发到 Anthropic OAuth/setup-token 账号的请求做 dateline
归一化，将 system prompt 与 <system-reminder> 块中 "Today's date is …"
语句里的 4 种撇号变体与 "/" 日期分隔符还原为 ASCII 撇号 + "-"，抹除某些
客户端在检测到非官方 base URL 时注入的 3 bit 隐写指纹。API Key 账号不受
影响。新增系统设置开关 enable_client_dateline_normalization，默认开启。
This commit is contained in:
shaw
2026-07-01 10:54:18 +08:00
parent c1335bae12
commit 59e9356c51
15 changed files with 782 additions and 2 deletions
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backend/internal/handler/admin/setting_handler.go
+12
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@@ -259,6 +259,7 @@ func (h *SettingHandler) GetSettings(c *gin.Context) {
ClaudeOAuthSystemPromptBlocks: settings.ClaudeOAuthSystemPromptBlocks,
EnableAnthropicCacheTTL1hInjection: settings.EnableAnthropicCacheTTL1hInjection,
RewriteMessageCacheControl: settings.RewriteMessageCacheControl,
EnableClientDatelineNormalization: settings.EnableClientDatelineNormalization,
AntigravityUserAgentVersion: settings.AntigravityUserAgentVersion,
OpenAICodexUserAgent: settings.OpenAICodexUserAgent,
MinCodexVersion: settings.MinCodexVersion,
@@ -598,6 +599,7 @@ type UpdateSettingsRequest struct {
ClaudeOAuthSystemPromptBlocks *string `json:"claude_oauth_system_prompt_blocks"`
EnableAnthropicCacheTTL1hInjection *bool `json:"enable_anthropic_cache_ttl_1h_injection"`
RewriteMessageCacheControl *bool `json:"rewrite_message_cache_control"`
EnableClientDatelineNormalization *bool `json:"enable_client_dateline_normalization"`
AntigravityUserAgentVersion *string `json:"antigravity_user_agent_version"`
OpenAICodexUserAgent *string `json:"openai_codex_user_agent"`
@@ -1731,6 +1733,12 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
}
return previousSettings.RewriteMessageCacheControl
}(),
EnableClientDatelineNormalization: func() bool {
if req.EnableClientDatelineNormalization != nil {
return *req.EnableClientDatelineNormalization
}
return previousSettings.EnableClientDatelineNormalization
}(),
AntigravityUserAgentVersion: func() string {
if req.AntigravityUserAgentVersion != nil {
return *req.AntigravityUserAgentVersion
@@ -2143,6 +2151,7 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
ClaudeOAuthSystemPromptBlocks: updatedSettings.ClaudeOAuthSystemPromptBlocks,
EnableAnthropicCacheTTL1hInjection: updatedSettings.EnableAnthropicCacheTTL1hInjection,
RewriteMessageCacheControl: updatedSettings.RewriteMessageCacheControl,
EnableClientDatelineNormalization: updatedSettings.EnableClientDatelineNormalization,
AntigravityUserAgentVersion: updatedSettings.AntigravityUserAgentVersion,
OpenAICodexUserAgent: updatedSettings.OpenAICodexUserAgent,
MinCodexVersion: updatedSettings.MinCodexVersion,
@@ -2644,6 +2653,9 @@ func diffSettings(before *service.SystemSettings, after *service.SystemSettings,
if before.RewriteMessageCacheControl != after.RewriteMessageCacheControl {
changed = append(changed, "rewrite_message_cache_control")
}
if before.EnableClientDatelineNormalization != after.EnableClientDatelineNormalization {
changed = append(changed, "enable_client_dateline_normalization")
}
if before.AntigravityUserAgentVersion != after.AntigravityUserAgentVersion {
changed = append(changed, "antigravity_user_agent_version")
}