Files
sub2api/backend/internal/server/routes/gateway.go
lucas morgan c548021921 feat(openai): 同步生图 API 支持并接入图片计费调度
- 同步 OpenAI 图片生成与编辑接口
- 接入图片请求解析、账号调度、转发与用量记录
- 接入图片计费与图片用量落库
- 限制 OAuth 生图仅支持无显式模型和尺寸的基础请求
2026-04-22 12:30:08 +08:00

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package routes
import (
"net/http"
"github.com/Wei-Shaw/sub2api/internal/config"
"github.com/Wei-Shaw/sub2api/internal/handler"
"github.com/Wei-Shaw/sub2api/internal/server/middleware"
"github.com/Wei-Shaw/sub2api/internal/service"
"github.com/gin-gonic/gin"
)
// RegisterGatewayRoutes 注册 API 网关路由Claude/OpenAI/Gemini 兼容)
func RegisterGatewayRoutes(
r *gin.Engine,
h *handler.Handlers,
apiKeyAuth middleware.APIKeyAuthMiddleware,
apiKeyService *service.APIKeyService,
subscriptionService *service.SubscriptionService,
opsService *service.OpsService,
settingService *service.SettingService,
cfg *config.Config,
) {
bodyLimit := middleware.RequestBodyLimit(cfg.Gateway.MaxBodySize)
clientRequestID := middleware.ClientRequestID()
opsErrorLogger := handler.OpsErrorLoggerMiddleware(opsService)
endpointNorm := handler.InboundEndpointMiddleware()
// 未分组 Key 拦截中间件(按协议格式区分错误响应)
requireGroupAnthropic := middleware.RequireGroupAssignment(settingService, middleware.AnthropicErrorWriter)
requireGroupGoogle := middleware.RequireGroupAssignment(settingService, middleware.GoogleErrorWriter)
// API网关Claude API兼容
gateway := r.Group("/v1")
gateway.Use(bodyLimit)
gateway.Use(clientRequestID)
gateway.Use(opsErrorLogger)
gateway.Use(endpointNorm)
gateway.Use(gin.HandlerFunc(apiKeyAuth))
gateway.Use(requireGroupAnthropic)
{
// /v1/messages: auto-route based on group platform
gateway.POST("/messages", func(c *gin.Context) {
if getGroupPlatform(c) == service.PlatformOpenAI {
h.OpenAIGateway.Messages(c)
return
}
h.Gateway.Messages(c)
})
// /v1/messages/count_tokens: OpenAI groups get 404
gateway.POST("/messages/count_tokens", func(c *gin.Context) {
if getGroupPlatform(c) == service.PlatformOpenAI {
c.JSON(http.StatusNotFound, gin.H{
"type": "error",
"error": gin.H{
"type": "not_found_error",
"message": "Token counting is not supported for this platform",
},
})
return
}
h.Gateway.CountTokens(c)
})
gateway.GET("/models", h.Gateway.Models)
gateway.GET("/usage", h.Gateway.Usage)
// OpenAI Responses API: auto-route based on group platform
gateway.POST("/responses", func(c *gin.Context) {
if getGroupPlatform(c) == service.PlatformOpenAI {
h.OpenAIGateway.Responses(c)
return
}
h.Gateway.Responses(c)
})
gateway.POST("/responses/*subpath", func(c *gin.Context) {
if getGroupPlatform(c) == service.PlatformOpenAI {
h.OpenAIGateway.Responses(c)
return
}
h.Gateway.Responses(c)
})
gateway.GET("/responses", h.OpenAIGateway.ResponsesWebSocket)
// OpenAI Chat Completions API: auto-route based on group platform
gateway.POST("/chat/completions", func(c *gin.Context) {
if getGroupPlatform(c) == service.PlatformOpenAI {
h.OpenAIGateway.ChatCompletions(c)
return
}
h.Gateway.ChatCompletions(c)
})
gateway.POST("/images/generations", func(c *gin.Context) {
if getGroupPlatform(c) != service.PlatformOpenAI {
c.JSON(http.StatusNotFound, gin.H{
"error": gin.H{
"type": "not_found_error",
"message": "Images API is not supported for this platform",
},
})
return
}
h.OpenAIGateway.Images(c)
})
gateway.POST("/images/edits", func(c *gin.Context) {
if getGroupPlatform(c) != service.PlatformOpenAI {
c.JSON(http.StatusNotFound, gin.H{
"error": gin.H{
"type": "not_found_error",
"message": "Images API is not supported for this platform",
},
})
return
}
h.OpenAIGateway.Images(c)
})
}
// Gemini 原生 API 兼容层Gemini SDK/CLI 直连)
gemini := r.Group("/v1beta")
gemini.Use(bodyLimit)
gemini.Use(clientRequestID)
gemini.Use(opsErrorLogger)
gemini.Use(endpointNorm)
gemini.Use(middleware.APIKeyAuthWithSubscriptionGoogle(apiKeyService, subscriptionService, cfg))
gemini.Use(requireGroupGoogle)
{
gemini.GET("/models", h.Gateway.GeminiV1BetaListModels)
gemini.GET("/models/:model", h.Gateway.GeminiV1BetaGetModel)
// Gin treats ":" as a param marker, but Gemini uses "{model}:{action}" in the same segment.
gemini.POST("/models/*modelAction", h.Gateway.GeminiV1BetaModels)
}
// OpenAI Responses API不带v1前缀的别名— auto-route based on group platform
responsesHandler := func(c *gin.Context) {
if getGroupPlatform(c) == service.PlatformOpenAI {
h.OpenAIGateway.Responses(c)
return
}
h.Gateway.Responses(c)
}
r.POST("/responses", bodyLimit, clientRequestID, opsErrorLogger, endpointNorm, gin.HandlerFunc(apiKeyAuth), requireGroupAnthropic, responsesHandler)
r.POST("/responses/*subpath", bodyLimit, clientRequestID, opsErrorLogger, endpointNorm, gin.HandlerFunc(apiKeyAuth), requireGroupAnthropic, responsesHandler)
r.GET("/responses", bodyLimit, clientRequestID, opsErrorLogger, endpointNorm, gin.HandlerFunc(apiKeyAuth), requireGroupAnthropic, h.OpenAIGateway.ResponsesWebSocket)
// OpenAI Chat Completions API不带v1前缀的别名— auto-route based on group platform
r.POST("/chat/completions", bodyLimit, clientRequestID, opsErrorLogger, endpointNorm, gin.HandlerFunc(apiKeyAuth), requireGroupAnthropic, func(c *gin.Context) {
if getGroupPlatform(c) == service.PlatformOpenAI {
h.OpenAIGateway.ChatCompletions(c)
return
}
h.Gateway.ChatCompletions(c)
})
r.POST("/images/generations", bodyLimit, clientRequestID, opsErrorLogger, endpointNorm, gin.HandlerFunc(apiKeyAuth), requireGroupAnthropic, func(c *gin.Context) {
if getGroupPlatform(c) != service.PlatformOpenAI {
c.JSON(http.StatusNotFound, gin.H{
"error": gin.H{
"type": "not_found_error",
"message": "Images API is not supported for this platform",
},
})
return
}
h.OpenAIGateway.Images(c)
})
r.POST("/images/edits", bodyLimit, clientRequestID, opsErrorLogger, endpointNorm, gin.HandlerFunc(apiKeyAuth), requireGroupAnthropic, func(c *gin.Context) {
if getGroupPlatform(c) != service.PlatformOpenAI {
c.JSON(http.StatusNotFound, gin.H{
"error": gin.H{
"type": "not_found_error",
"message": "Images API is not supported for this platform",
},
})
return
}
h.OpenAIGateway.Images(c)
})
// Antigravity 模型列表
r.GET("/antigravity/models", gin.HandlerFunc(apiKeyAuth), requireGroupAnthropic, h.Gateway.AntigravityModels)
// Antigravity 专用路由(仅使用 antigravity 账户,不混合调度)
antigravityV1 := r.Group("/antigravity/v1")
antigravityV1.Use(bodyLimit)
antigravityV1.Use(clientRequestID)
antigravityV1.Use(opsErrorLogger)
antigravityV1.Use(endpointNorm)
antigravityV1.Use(middleware.ForcePlatform(service.PlatformAntigravity))
antigravityV1.Use(gin.HandlerFunc(apiKeyAuth))
antigravityV1.Use(requireGroupAnthropic)
{
antigravityV1.POST("/messages", h.Gateway.Messages)
antigravityV1.POST("/messages/count_tokens", h.Gateway.CountTokens)
antigravityV1.GET("/models", h.Gateway.AntigravityModels)
antigravityV1.GET("/usage", h.Gateway.Usage)
}
antigravityV1Beta := r.Group("/antigravity/v1beta")
antigravityV1Beta.Use(bodyLimit)
antigravityV1Beta.Use(clientRequestID)
antigravityV1Beta.Use(opsErrorLogger)
antigravityV1Beta.Use(endpointNorm)
antigravityV1Beta.Use(middleware.ForcePlatform(service.PlatformAntigravity))
antigravityV1Beta.Use(middleware.APIKeyAuthWithSubscriptionGoogle(apiKeyService, subscriptionService, cfg))
antigravityV1Beta.Use(requireGroupGoogle)
{
antigravityV1Beta.GET("/models", h.Gateway.GeminiV1BetaListModels)
antigravityV1Beta.GET("/models/:model", h.Gateway.GeminiV1BetaGetModel)
antigravityV1Beta.POST("/models/*modelAction", h.Gateway.GeminiV1BetaModels)
}
}
// getGroupPlatform extracts the group platform from the API Key stored in context.
func getGroupPlatform(c *gin.Context) string {
apiKey, ok := middleware.GetAPIKeyFromContext(c)
if !ok || apiKey.Group == nil {
return ""
}
return apiKey.Group.Platform
}