From c3fcc37cc486ef0f6b8efbbaa4e988bb5a073eb8 Mon Sep 17 00:00:00 2001 From: erio Date: Fri, 17 Apr 2026 18:32:33 +0800 Subject: [PATCH] feat(gateway): raise upstream non-streaming response read limit to 64MB MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 非流式上游响应读取上限从 8MB 提到 64MB，避免图片生成（image_generation_call 返回 base64 内联图）单张高清图就把响应撑爆、被 `ReadUpstreamResponseBody` 直接拒绝成 upstream_error 502。 64MB ≈ 48MB 原始字节（base64 膨胀 33%），足够一次响应带多张高清图。依然通过 gateway.upstream_response_read_max_bytes 可配置。 --- backend/internal/config/config.go | 2 +- backend/internal/service/upstream_response_limit.go | 5 ++++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/backend/internal/config/config.go b/backend/internal/config/config.go index dd9a4e588f..3d9438ce30 100644 --- a/backend/internal/config/config.go +++ b/backend/internal/config/config.go @@ -1407,7 +1407,7 @@ func setDefaults() { viper.SetDefault("gateway.antigravity_fallback_cooldown_minutes", 1) viper.SetDefault("gateway.antigravity_extra_retries", 10) viper.SetDefault("gateway.max_body_size", int64(256*1024*1024)) - viper.SetDefault("gateway.upstream_response_read_max_bytes", int64(8*1024*1024)) + viper.SetDefault("gateway.upstream_response_read_max_bytes", int64(64*1024*1024)) viper.SetDefault("gateway.proxy_probe_response_read_max_bytes", int64(1024*1024)) viper.SetDefault("gateway.gemini_debug_response_headers", false) viper.SetDefault("gateway.connection_pool_isolation", ConnectionPoolIsolationAccountProxy) diff --git a/backend/internal/service/upstream_response_limit.go b/backend/internal/service/upstream_response_limit.go index a0444d5209..bc3bfdaf77 100644 --- a/backend/internal/service/upstream_response_limit.go +++ b/backend/internal/service/upstream_response_limit.go @@ -12,7 +12,10 @@ import ( var ErrUpstreamResponseBodyTooLarge = errors.New("upstream response body too large") -const defaultUpstreamResponseReadMaxBytes int64 = 8 * 1024 * 1024 +// defaultUpstreamResponseReadMaxBytes 上游非流式响应体的默认读取上限。 +// 64 MB 足以容纳多张高清图（base64 膨胀 33%，64MB ≈ 48MB 原始字节）。 +// 可通过 gateway.upstream_response_read_max_bytes 配置项覆盖。 +const defaultUpstreamResponseReadMaxBytes int64 = 64 * 1024 * 1024 func resolveUpstreamResponseReadLimit(cfg *config.Config) int64 { if cfg != nil && cfg.Gateway.UpstreamResponseReadMaxBytes > 0 {