feat(gateway): 优化 Antigravity/Gemini 思考块处理
此提交解决了思考块 (thinking blocks) 在转发过程中的兼容性问题。 主要变更: 1. **思考块优化 (Thinking Blocks)**: - 在 AntigravityGatewayService 中增加了 sanitizeThinkingBlocks 处理,强制移除思考块中不支持的 cache_control 字段(避免 Anthropic/Vertex AI 报错) - 实现历史思考块展平 (Flattening):将非最后一条消息中的思考块转换为普通文本块,以绕过上游对历史思考块签名的严格校验 - 增加 cleanCacheControlFromGeminiJSON 作为最后一道防线,确保转换后的 Gemini 请求中不残留非法的 cache_control 2. **GatewayService 缓存控制优化**: - 更新缓存控制逻辑,跳过 thinking 块(thinking 块不支持 cache_control 字段) - 增加 removeCacheControlFromThinkingBlocks 函数强制清理 关联 Issue: #225
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@@ -261,12 +261,11 @@ func (h *GatewayHandler) Messages(c *gin.Context) {
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var failoverErr *service.UpstreamFailoverError
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if errors.As(err, &failoverErr) {
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failedAccountIDs[account.ID] = struct{}{}
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lastFailoverStatus = failoverErr.StatusCode
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if switchCount >= maxAccountSwitches {
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lastFailoverStatus = failoverErr.StatusCode
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h.handleFailoverExhausted(c, lastFailoverStatus, streamStarted)
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return
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}
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lastFailoverStatus = failoverErr.StatusCode
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switchCount++
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log.Printf("Account %d: upstream error %d, switching account %d/%d", account.ID, failoverErr.StatusCode, switchCount, maxAccountSwitches)
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continue
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@@ -390,12 +389,11 @@ func (h *GatewayHandler) Messages(c *gin.Context) {
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var failoverErr *service.UpstreamFailoverError
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if errors.As(err, &failoverErr) {
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failedAccountIDs[account.ID] = struct{}{}
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lastFailoverStatus = failoverErr.StatusCode
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if switchCount >= maxAccountSwitches {
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lastFailoverStatus = failoverErr.StatusCode
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h.handleFailoverExhausted(c, lastFailoverStatus, streamStarted)
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return
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}
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lastFailoverStatus = failoverErr.StatusCode
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switchCount++
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log.Printf("Account %d: upstream error %d, switching account %d/%d", account.ID, failoverErr.StatusCode, switchCount, maxAccountSwitches)
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continue
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