From 7fdc25df3cd391bd1899eaec2771d7143a1fe8dc Mon Sep 17 00:00:00 2001
From: ianshaw <ianshaw027@gmail.com>
Date: Mon, 12 Jan 2026 11:39:45 -0800
Subject: [PATCH] =?UTF-8?q?fix(gateway):=20=E4=BF=AE=E5=A4=8D=20base=5Furl?=
 =?UTF-8?q?=20=E5=8C=85=E5=90=AB=20/chat/completions=20=E6=97=B6=E8=B7=AF?=
 =?UTF-8?q?=E5=BE=84=E6=8B=BC=E6=8E=A5=E9=94=99=E8=AF=AF?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

问题：
- 当账号的 base_url 配置为 https://example.com/v1/chat/completions 时
- 代码直接追加 /responses，导致路径变成 /v1/chat/completions/responses
- 上游返回 404 错误

修复：
- 在追加 /responses 前，先移除 base_url 中的 /chat/completions 后缀
- 确保最终路径为 https://example.com/v1/responses

影响范围：
- OpenAI API Key 账号的测试接口
- OpenAI API Key 账号的实际网关请求

Related-to: #231
---
 backend/internal/service/account_test_service.go   | 5 ++++-
 backend/internal/service/openai_gateway_service.go | 3 +++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/backend/internal/service/account_test_service.go b/backend/internal/service/account_test_service.go
index 8419c2b4..c17aa3ff 100644
--- a/backend/internal/service/account_test_service.go
+++ b/backend/internal/service/account_test_service.go
@@ -332,7 +332,10 @@ func (s *AccountTestService) testOpenAIAccountConnection(c *gin.Context, account
 		if err != nil {
 			return s.sendErrorAndEnd(c, fmt.Sprintf("Invalid base URL: %s", err.Error()))
 		}
-		apiURL = strings.TrimSuffix(normalizedBaseURL, "/") + "/responses"
+		// Remove /chat/completions suffix if present, then add /responses
+		normalizedBaseURL = strings.TrimSuffix(normalizedBaseURL, "/")
+		normalizedBaseURL = strings.TrimSuffix(normalizedBaseURL, "/chat/completions")
+		apiURL = normalizedBaseURL + "/responses"
 	} else {
 		return s.sendErrorAndEnd(c, fmt.Sprintf("Unsupported account type: %s", account.Type))
 	}
diff --git a/backend/internal/service/openai_gateway_service.go b/backend/internal/service/openai_gateway_service.go
index 214da20a..0e228fb1 100644
--- a/backend/internal/service/openai_gateway_service.go
+++ b/backend/internal/service/openai_gateway_service.go
@@ -740,6 +740,9 @@ func (s *OpenAIGatewayService) buildUpstreamRequest(ctx context.Context, c *gin.
 			if err != nil {
 				return nil, err
 			}
+			// Remove /chat/completions suffix if present, then add /responses
+			validatedURL = strings.TrimSuffix(validatedURL, "/")
+			validatedURL = strings.TrimSuffix(validatedURL, "/chat/completions")
 			targetURL = validatedURL + "/responses"
 		}
 	default: