refactor: reuse shared rmbg service for box cutout

app/api/canvas/box-cutout/route.ts

@@ -2,6 +2,11 @@ import { NextRequest, NextResponse } from "next/server";
 import sharp from "sharp";
 
 import { auth } from "@/app/(auth)/auth";
+import {
+  executeRmbgJob,
+  fetchImageBufferFromUrl,
+  RmbgServiceError,
+} from "@/lib/ai/rmbg/service";
 
 export const runtime = "nodejs";
 export const maxDuration = 60;
@@ -103,16 +108,6 @@ function applyPadding(
   };
 }
 
-async function fetchImageBuffer(imageUrl: string) {
-  const response = await fetch(imageUrl, { cache: "no-store" });
-  if (!response.ok) {
-    throw new Error(`无法获取图片: ${response.status} ${response.statusText}`);
-  }
-
-  const arrayBuffer = await response.arrayBuffer();
-  return Buffer.from(arrayBuffer);
-}
-
 export async function POST(request: NextRequest) {
   try {
     const session = await auth();
@@ -135,7 +130,7 @@ export async function POST(request: NextRequest) {
     const resolvedImageUrl = new URL(rawImageUrl, request.url).toString();
     const paddingRatio = normalizePaddingRatio(body.paddingRatio);
 
-    const sourceBuffer = await sharp(await fetchImageBuffer(resolvedImageUrl), { failOn: "none" })
+    const sourceBuffer = await sharp(await fetchImageBufferFromUrl(resolvedImageUrl), { failOn: "none" })
       .rotate()
       .toBuffer();
     const sourceImage = sharp(sourceBuffer, { failOn: "none" });
@@ -166,40 +161,19 @@ export async function POST(request: NextRequest) {
       })
       .toBuffer();
 
-    const croppedBase64 = croppedBuffer.toString("base64");
+    const rmbgResult = await executeRmbgJob({
-    const rmbgUrl = new URL("/api/rmbg", request.url);
+      userId: session.user.id,
-    const rmbgResponse = await fetch(rmbgUrl, {
+      imageBuffer: croppedBuffer,
-      method: "POST",
+      imageBase64: croppedBuffer.toString("base64"),
-      headers: {
+      sourceImageUrl: resolvedImageUrl,
-        "Content-Type": "application/json",
+      prompt: body.prompt || "框选抠图",
-        cookie: request.headers.get("cookie") || "",
+      chatId: body.chatId || null,
-        ...(request.headers.get("authorization")
+      messageId: body.messageId || null,
-          ? { authorization: request.headers.get("authorization") as string }
+      skipGallerySave: body.skipGallerySave === true,
-          : {}),
-      },
-      cache: "no-store",
-      body: JSON.stringify({
-        image_base64: croppedBase64,
-        sourceImageUrl: resolvedImageUrl,
-        prompt: body.prompt || "框选抠图",
-        chatId: body.chatId || null,
-        messageId: body.messageId || null,
-        skipGallerySave: body.skipGallerySave === true,
-      }),
     });
 
-    const rmbgResult = await rmbgResponse.json().catch(() => null);
-    if (!rmbgResponse.ok || !rmbgResult?.success) {
-      return NextResponse.json(
-        {
-          success: false,
-          error: rmbgResult?.error || rmbgResult?.detail || "框选抠图失败",
-        },
-        { status: rmbgResponse.status || 500 }
-      );
-    }
-
     return NextResponse.json({
+      success: true,
       ...rmbgResult,
       cropRectApplied: cropRect,
       paddedCropRectApplied: paddedCropRect,
@@ -208,6 +182,16 @@ export async function POST(request: NextRequest) {
       sourceNodeId: body.sourceNodeId || null,
     });
   } catch (error) {
+    if (error instanceof RmbgServiceError) {
+      return NextResponse.json(
+        {
+          success: false,
+          error: error.detail || error.message,
+        },
+        { status: error.status }
+      );
+    }
+
     console.error("[BoxCutout] 处理失败:", error);
     return NextResponse.json(
       {

app/api/rmbg/route.ts

@@ -1,509 +1,27 @@
 import { NextRequest, NextResponse } from "next/server";
-import {
+
-  createMediaAssetRelation,
-  getMediaAssetsByUserAndUrls,
-  getSystemSetting,
-  upsertMediaAsset,
-} from "@/lib/db/queries";
 import { auth } from "@/app/(auth)/auth";
-import { uploadFile } from "@/lib/storage/service";
+import {
-import { db } from "@/lib/db";
+  executeRmbgJob,
-import { generatedImage } from "@/lib/db/schema";
+  fetchImageBufferFromUrl,
+  RmbgServiceError,
+} from "@/lib/ai/rmbg/service";
 
-type RmbgProvider = "rmbg" | "photoroom" | "aoscdn";
+export const runtime = "nodejs";
+export const maxDuration = 60;
 
-/**
- * 压缩图片生成缩略图（使用 sharp）
- */
-async function createThumbnail(buffer: Buffer, mimeType: string): Promise<Buffer> {
-  try {
-    const sharp = await import("sharp");
-    
-    // 创建缩略图（宽度 500px，高度按比例，质量 80%）
-    const thumbnailBuffer = await sharp.default(buffer)
-      .resize(500, null, {
-        fit: "inside",
-        withoutEnlargement: true,
-      })
-      .png({ quality: 80 }) // PNG格式保持透明背景
-      .toBuffer();
-    
-    console.log(`[RMBG] Thumbnail created, size: ${thumbnailBuffer.length} bytes (original: ${buffer.length} bytes)`);
-    return thumbnailBuffer;
-  } catch (error) {
-    console.error("[RMBG] Failed to create thumbnail:", error);
-    // 如果失败，返回原图
-    return buffer;
-  }
-}
-
-/**
- * 将图片 buffer 上传到 S3，返回缩略图和原图的 URL
- */
-async function uploadBufferToS3(buffer: Buffer, mimeType: string = "image/png"): Promise<{ thumbnail: string; original: string }> {
-  try {
-    // 生成文件名
-    const ext = mimeType.split("/")[1] || "png";
-    const timestamp = Date.now();
-    const randomStr = Math.random().toString(36).slice(2, 8);
-    const thumbnailFilename = `rmbg-thumb-${timestamp}-${randomStr}.${ext}`;
-    const originalFilename = `rmbg-orig-${timestamp}-${randomStr}.${ext}`;
-    
-    console.log(`[RMBG] Original size: ${buffer.length} bytes`);
-    
-    // 生成缩略图
-    const thumbnailBuffer = await createThumbnail(buffer, mimeType);
-    
-    // 转换为 ArrayBuffer
-    const thumbnailArrayBuffer = thumbnailBuffer.buffer.slice(
-      thumbnailBuffer.byteOffset, 
-      thumbnailBuffer.byteOffset + thumbnailBuffer.byteLength
-    ) as ArrayBuffer;
-    const originalArrayBuffer = buffer.buffer.slice(
-      buffer.byteOffset, 
-      buffer.byteOffset + buffer.byteLength
-    ) as ArrayBuffer;
-    
-    // 并行上传缩略图和原图到 S3
-    console.log(`[RMBG] Uploading thumbnail and original to S3...`);
-    const [thumbnailResult, originalResult] = await Promise.all([
-      uploadFile(thumbnailFilename, thumbnailArrayBuffer),
-      uploadFile(originalFilename, originalArrayBuffer),
-    ]);
-    
-    console.log(`[RMBG] Uploaded to S3:`);
-    console.log(`  - Thumbnail: ${thumbnailResult.url}`);
-    console.log(`  - Original: ${originalResult.url}`);
-    
-    return {
-      thumbnail: thumbnailResult.url,
-      original: originalResult.url,
-    };
-  } catch (error) {
-    console.error("[RMBG] Failed to upload to S3:", error);
-    throw new Error(`图片上传到存储桶失败: ${error instanceof Error ? error.message : "未知错误"}。请检查系统设置中的存储配置。`);
-  }
-}
-
-/**
- * 将 base64 图片上传到 S3，返回缩略图和原图的 URL
- */
-async function uploadBase64ToS3(base64Data: string, mimeType: string = "image/png"): Promise<{ thumbnail: string; original: string }> {
-  const buffer = Buffer.from(base64Data, "base64");
-  return uploadBufferToS3(buffer, mimeType);
-}
-
-const sleep = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));
-const AOS_MAX_RESOLUTION = 4096;
-const AOS_CREATE_TIMEOUT_MS = 120_000;
-const AOS_POLL_TIMEOUT_MS = 60_000;
-const AOS_DOWNLOAD_TIMEOUT_MS = 60_000;
-
-const withTimeout = async <T,>(
-  fn: (signal: AbortSignal) => Promise<T>,
-  timeoutMs: number
-): Promise<T> => {
-  const controller = new AbortController();
-  const timeoutId = setTimeout(() => controller.abort(), timeoutMs);
-  try {
-    return await fn(controller.signal);
-  } finally {
-    clearTimeout(timeoutId);
-  }
-};
-
-function getAosFriendlyErrorMessage(detail: string): string | null {
-  const resolutionMatch = detail.match(/resolution excess,\s*width=(\d+),\s*height=(\d+)/i);
-  if (resolutionMatch) {
-    const [, width, height] = resolutionMatch;
-    return `图片分辨率超限（${width}x${height}），AOS要求宽高都不超过 ${AOS_MAX_RESOLUTION}px。请缩小后重试。`;
-  }
-
-  if (/invalid file/i.test(detail)) {
-    return "图片文件无法识别，请尝试转换为 JPG/PNG 后重试。";
-  }
-
-  return null;
-}
-
-async function prepareImageForAos(
-  imageBuffer: Buffer
-): Promise<{ buffer: Buffer; mimeType: string; filename: string }> {
-  try {
-    const sharp = await import("sharp");
-    const image = sharp.default(imageBuffer);
-    const metadata = await image.metadata();
-    const width = metadata.width;
-    const height = metadata.height;
-    const format = (metadata.format || "png").toLowerCase();
-
-    const ext = format === "jpeg" ? "jpg" : format;
-    const filenameExt =
-      ext === "jpg" || ext === "png" || ext === "webp" || ext === "tiff" ? ext : "png";
-    const mimeType =
-      ext === "jpg" ? "image/jpeg" :
-      ext === "webp" ? "image/webp" :
-      ext === "tiff" ? "image/tiff" :
-      "image/png";
-
-    if (!width || !height || (width <= AOS_MAX_RESOLUTION && height <= AOS_MAX_RESOLUTION)) {
-      return {
-        buffer: imageBuffer,
-        mimeType,
-        filename: `image.${filenameExt}`,
-      };
-    }
-
-    const resizedBuffer = await image
-      .resize(AOS_MAX_RESOLUTION, AOS_MAX_RESOLUTION, {
-        fit: "inside",
-        withoutEnlargement: true,
-      })
-      .toBuffer();
-    const resizedMeta = await sharp.default(resizedBuffer).metadata();
-
-    console.warn(
-      `[AOS RMBG] 输入图片分辨率超限，已自动缩放: ${width}x${height} -> ${resizedMeta.width}x${resizedMeta.height}`
-    );
-
-    return {
-      buffer: resizedBuffer,
-      mimeType,
-      filename: `image.${filenameExt}`,
-    };
-  } catch (error) {
-    console.error("[AOS RMBG] 图片预处理失败，继续使用原图:", error);
-    return { buffer: imageBuffer, mimeType: "image/png", filename: "image.png" };
-  }
-}
-
-/**
- * 使用 RMBG-2.0 API 进行抠图
- */
-async function processWithRMBG(
-  imageBase64: string,
-  config: { apiUrl: string; apiKey?: string }
-): Promise<{ success: boolean; image_base64?: string; processing_time?: number; error?: string }> {
-  const apiUrl = config.apiUrl.endsWith("/")
-    ? `${config.apiUrl}rmbg/base64`
-    : `${config.apiUrl}/rmbg/base64`;
-
-  const requestBody = {
-    image_base64: imageBase64,
-  };
-
-  const headers: HeadersInit = {
-    "Content-Type": "application/json",
-  };
-
-  if (config.apiKey) {
-    headers["X-API-Key"] = config.apiKey;
-  }
-
-  const startTime = Date.now();
-  
-  // 添加超时控制（30秒）
-  const controller = new AbortController();
-  const timeoutId = setTimeout(() => controller.abort(), 30000);
-  
-  try {
-    const response = await fetch(apiUrl, {
-      method: "POST",
-      headers,
-      body: JSON.stringify(requestBody),
-      signal: controller.signal,
-    });
-    
-    clearTimeout(timeoutId);
-    const processingTime = (Date.now() - startTime) / 1000;
-
-    if (!response.ok) {
-      const errorText = await response.text();
-      console.error("[RMBG API] 请求失败:", { status: response.status, error: errorText });
-      return { success: false, error: errorText || response.statusText };
-    }
-
-    const result = await response.json();
-    
-    if (!result.success || !result.image_base64) {
-      return { success: false, error: result.detail || "未知错误" };
-    }
-
-    return {
-      success: true,
-      image_base64: result.image_base64,
-      processing_time: result.processing_time || processingTime,
-    };
-  } catch (error) {
-    clearTimeout(timeoutId);
-    if (error instanceof Error && error.name === 'AbortError') {
-      return { success: false, error: "请求超时（30秒）" };
-    }
-    return { success: false, error: error instanceof Error ? error.message : "未知错误" };
-  }
-}
-
-/**
- * 使用 PhotoRoom API 进行抠图
- */
-async function processWithPhotoRoom(
-  imageBuffer: Buffer,
-  apiKey: string
-): Promise<{ success: boolean; imageBuffer?: Buffer; processing_time?: number; error?: string }> {
-  const startTime = Date.now();
-  
-  try {
-    // 构建 FormData
-    const formData = new FormData();
-    // 将 Buffer 转换为 Uint8Array 以避免类型问题
-    const uint8Array = new Uint8Array(imageBuffer);
-    const blob = new Blob([uint8Array], { type: "image/png" });
-    formData.append("imageFile", blob, "image.png");
-    formData.append("referenceBox", "originalImage");
-
-    console.log("[PhotoRoom] Sending request to API...");
-    
-    // 添加超时控制（60秒，PhotoRoom可能需要更长时间）
-    const controller = new AbortController();
-    const timeoutId = setTimeout(() => controller.abort(), 60000);
-
-    const response = await fetch("https://image-api.photoroom.com/v2/edit", {
-      method: "POST",
-      headers: {
-        "x-api-key": apiKey,
-        "pr-hd-background-removal": "auto",
-      },
-      body: formData,
-      signal: controller.signal,
-    });
-
-    clearTimeout(timeoutId);
-    const processingTime = (Date.now() - startTime) / 1000;
-
-    console.log("[PhotoRoom] Response status:", response.status);
-
-    if (!response.ok) {
-      const errorText = await response.text();
-      console.error("[PhotoRoom API] 请求失败:", { status: response.status, error: errorText });
-      return { success: false, error: `PhotoRoom API错误: ${response.status} - ${errorText}` };
-    }
-
-    // PhotoRoom 直接返回图片二进制数据
-    const resultBuffer = Buffer.from(await response.arrayBuffer());
-    console.log("[PhotoRoom] Received image buffer, size:", resultBuffer.length, "bytes");
-
-    return {
-      success: true,
-      imageBuffer: resultBuffer,
-      processing_time: processingTime,
-    };
-  } catch (error) {
-    if (error instanceof Error && error.name === 'AbortError') {
-      return { success: false, error: "PhotoRoom请求超时（60秒）" };
-    }
-    console.error("[PhotoRoom] Error:", error);
-    return { success: false, error: error instanceof Error ? error.message : "未知错误" };
-  }
-}
-
-/**
- * 使用 AOS segmentation API 进行抠图（异步任务 + 轮询）
- */
-async function processWithAosSegmentation(
-  imageBuffer: Buffer,
-  config: {
-    apiKey: string;
-    apiBaseUrl?: string;
-    foregroundType?: "" | "person" | "object" | "stamp";
-    crop?: 0 | 1;
-    format?: "png" | "jpg";
-  }
-): Promise<{ success: boolean; imageBuffer?: Buffer; processing_time?: number; error?: string }> {
-  const startTime = Date.now();
-  const baseUrl = (config.apiBaseUrl || "https://techsz.aoscdn.com").replace(/\/+$/, "");
-  const createUrl = `${baseUrl}/api/tasks/visual/segmentation`;
-  const headers = { "X-API-KEY": config.apiKey };
-
-  try {
-    const normalizedImage = await prepareImageForAos(imageBuffer);
-    const createForm = new FormData();
-    const imageBlob = new Blob([new Uint8Array(normalizedImage.buffer)], { type: normalizedImage.mimeType });
-    createForm.append("image_file", imageBlob, normalizedImage.filename);
-    createForm.append("sync", "0");
-    createForm.append("return_type", "1");
-    createForm.append("output_type", "2");
-    createForm.append("format", config.format || "png");
-    createForm.append("crop", config.crop === 1 ? "1" : "0");
-    if (config.foregroundType) {
-      createForm.append("type", config.foregroundType);
-    }
-
-    console.log("[AOS RMBG] creating segmentation task...");
-    const createResponse = await withTimeout(
-      (signal) =>
-        fetch(createUrl, {
-          method: "POST",
-          headers,
-          body: createForm,
-          signal,
-        }),
-      AOS_CREATE_TIMEOUT_MS
-    );
-
-    const createPayload = await createResponse.json().catch(() => null);
-    if (!createResponse.ok || !createPayload?.data?.task_id) {
-      return {
-        success: false,
-        error: `AOS任务创建失败: ${createPayload?.message || createResponse.statusText}`,
-      };
-    }
-
-    const taskId = createPayload.data.task_id as string;
-    const taskUrl = `${createUrl}/${taskId}`;
-    const maxPollCount = 60;
-
-    for (let pollCount = 0; pollCount < maxPollCount; pollCount++) {
-      await sleep(1000);
-
-      const pollResponse = await withTimeout(
-        (signal) =>
-          fetch(taskUrl, {
-            method: "GET",
-            headers,
-            signal,
-          }),
-        AOS_POLL_TIMEOUT_MS
-      );
-
-      const pollPayload = await pollResponse.json().catch(() => null);
-      if (!pollResponse.ok || !pollPayload?.data) {
-        return {
-          success: false,
-          error: `AOS任务查询失败: ${pollPayload?.message || pollResponse.statusText}`,
-        };
-      }
-
-      const state = Number(pollPayload.data.state);
-      const imageUrl = pollPayload.data.image as string | undefined;
-      const stateDetail = String(pollPayload.data.state_detail || "");
-      const errMessage = String(pollPayload.data.err_message || pollPayload.data.err_info || "");
-
-      if (pollCount === 0 || pollCount % 5 === 0) {
-        console.log(`[AOS RMBG] poll=${pollCount + 1} state=${state} detail=${stateDetail}`);
-      }
-
-      if (state === 1 && imageUrl) {
-        const imageResponse = await withTimeout(
-          (signal) =>
-            fetch(imageUrl, {
-              method: "GET",
-              signal,
-            }),
-          AOS_DOWNLOAD_TIMEOUT_MS
-        );
-
-        if (!imageResponse.ok) {
-          return {
-            success: false,
-            error: `AOS结果下载失败: ${imageResponse.status} ${imageResponse.statusText}`,
-          };
-        }
-
-        const resultBuffer = Buffer.from(await imageResponse.arrayBuffer());
-        return {
-          success: true,
-          imageBuffer: resultBuffer,
-          processing_time: (Date.now() - startTime) / 1000,
-        };
-      }
-
-      // AOS: state=2(Preparing) 属于处理中，不能当失败；只有负数状态视为失败
-      if (state < 0) {
-        return {
-          success: false,
-          error: `AOS任务失败: ${errMessage || stateDetail || pollPayload?.message || "状态异常"}`,
-        };
-      }
-    }
-
-    return { success: false, error: "AOS任务超时（最多60秒）" };
-  } catch (error) {
-    if (error instanceof Error && error.name === "AbortError") {
-      return { success: false, error: "AOS请求超时，请稍后重试" };
-    }
-    return { success: false, error: error instanceof Error ? error.message : "未知错误" };
-  }
-}
-
-/**
- * 抠图API路由
- * 从数据库读取API配置，支持 RMBG-2.0、PhotoRoom、AOS 三种服务
- */
 export async function POST(request: NextRequest) {
   try {
-    // 0. 获取用户会话
     const session = await auth();
     if (!session?.user?.id) {
-      return NextResponse.json(
+      return NextResponse.json({ error: "未授权，请先登录" }, { status: 401 });
-        { error: "未授权，请先登录" },
-        { status: 401 }
-      );
     }
 
-    const userId = session.user.id;
-    
-    // 1. 从数据库获取抠图API配置
-    const rmbgConfig = await getSystemSetting({ key: "rmbg_api_config" });
-    
-    if (!rmbgConfig || !rmbgConfig.value) {
-      return NextResponse.json(
-        { error: "抠图API配置未设置，请在系统设置中配置" },
-        { status: 400 }
-      );
-    }
-
-    const config = rmbgConfig.value as {
-      provider?: RmbgProvider;
-      apiUrl?: string;
-      apiKey?: string;
-      photoroomApiKey?: string;
-      aosApiKey?: string;
-      aosApiBaseUrl?: string;
-      aosForegroundType?: "" | "person" | "object" | "stamp";
-      aosCrop?: 0 | 1;
-      aosFormat?: "png" | "jpg";
-    };
-
-    const provider: RmbgProvider = config.provider || "rmbg";
-    
-    // 验证配置
-    if (provider === "rmbg" && !config.apiUrl) {
-      return NextResponse.json(
-        { error: "RMBG API地址未配置" },
-        { status: 400 }
-      );
-    }
-    
-    if (provider === "photoroom" && !config.photoroomApiKey) {
-      return NextResponse.json(
-        { error: "PhotoRoom API密钥未配置" },
-        { status: 400 }
-      );
-    }
-
-    if (provider === "aoscdn" && !config.aosApiKey) {
-      return NextResponse.json(
-        { error: "AOS API密钥未配置" },
-        { status: 400 }
-      );
-    }
-
-    // 2. 获取请求体
     const contentType = request.headers.get("content-type") || "";
 
     let imageBuffer: Buffer;
-    let imageBase64: string;
+    let imageBase64: string | undefined;
-    let prompt = "";
+    let prompt = "抠图处理";
     let chatId: string | null = null;
     let messageId: string | null = null;
     let skipGallerySave = false;
@@ -515,33 +33,15 @@ export async function POST(request: NextRequest) {
       chatId = body.chatId || null;
       messageId = body.messageId || null;
       skipGallerySave = body.skipGallerySave === true || body.skip_gallery_save === 1;
+
       const imageUrl = body.imageUrl || body.image_url;
       const explicitSourceImageUrl = body.sourceImageUrl || body.source_image_url;
 
       if (imageUrl) {
         sourceImageUrl = String(imageUrl);
-        console.log(`[RMBG] 从 URL 获取图片: ${imageUrl}`);
+        imageBuffer = await fetchImageBufferFromUrl(sourceImageUrl);
-        try {
-          const imageResponse = await fetch(imageUrl);
-          if (!imageResponse.ok) {
-            return NextResponse.json(
-              { error: `无法获取图片: ${imageResponse.status} ${imageResponse.statusText}` },
-              { status: 400 }
-            );
-          }
-          const arrayBuffer = await imageResponse.arrayBuffer();
-          imageBuffer = Buffer.from(arrayBuffer);
-          imageBase64 = imageBuffer.toString("base64");
-          console.log(`[RMBG] 图片已获取，大小: ${imageBuffer.length} bytes`);
-        } catch (fetchError) {
-          console.error("[RMBG] 获取图片失败:", fetchError);
-          return NextResponse.json(
-            { error: "无法获取图片，请检查图片链接是否有效" },
-            { status: 400 }
-          );
-        }
       } else if (body.image_base64) {
-        imageBase64 = body.image_base64;
+        imageBase64 = String(body.image_base64);
         imageBuffer = Buffer.from(imageBase64, "base64");
         if (explicitSourceImageUrl) {
           sourceImageUrl = String(explicitSourceImageUrl);
@@ -554,13 +54,10 @@ export async function POST(request: NextRequest) {
       }
     } else if (contentType.includes("multipart/form-data")) {
       const formData = await request.formData();
-      const file = formData.get("file") as File;
+      const file = formData.get("file") as File | null;
 
       if (!file) {
-        return NextResponse.json(
+        return NextResponse.json({ error: "缺少file参数" }, { status: 400 });
-          { error: "缺少file参数" },
-          { status: 400 }
-        );
       }
 
       const arrayBuffer = await file.arrayBuffer();
@@ -569,6 +66,12 @@ export async function POST(request: NextRequest) {
       prompt = (formData.get("prompt") as string) || "抠图处理";
       chatId = (formData.get("chatId") as string) || null;
       messageId = (formData.get("messageId") as string) || null;
+      skipGallerySave =
+        formData.get("skipGallerySave") === "true" || formData.get("skip_gallery_save") === "1";
+      sourceImageUrl =
+        (formData.get("sourceImageUrl") as string) ||
+        (formData.get("source_image_url") as string) ||
+        null;
     } else {
       return NextResponse.json(
         { error: "不支持的Content-Type，请使用application/json或multipart/form-data" },
@@ -576,192 +79,32 @@ export async function POST(request: NextRequest) {
       );
     }
 
-    // 3. 根据提供商调用不同的API
+    const result = await executeRmbgJob({
-    console.log(`[RMBG] Using provider: ${provider}`);
+      userId: session.user.id,
+      imageBuffer,
+      imageBase64,
+      prompt,
+      chatId,
+      messageId,
+      skipGallerySave,
+      sourceImageUrl,
+    });
 
-    let resultBuffer: Buffer;
+    return NextResponse.json({
-    let resultBase64: string;
+      success: true,
-    let processingTime: number;
+      ...result,
-
+    });
-    if (provider === "photoroom") {
+  } catch (error) {
-      // 使用 PhotoRoom API
+    if (error instanceof RmbgServiceError) {
-      const result = await processWithPhotoRoom(imageBuffer, config.photoroomApiKey!);
-      
-      if (!result.success || !result.imageBuffer) {
-        return NextResponse.json(
-          { error: "抠图处理失败", detail: result.error },
-          { status: 500 }
-        );
-      }
-      
-      resultBuffer = result.imageBuffer;
-      resultBase64 = resultBuffer.toString("base64");
-      processingTime = result.processing_time || 0;
-    } else if (provider === "aoscdn") {
-      const result = await processWithAosSegmentation(imageBuffer, {
-        apiKey: config.aosApiKey!,
-        apiBaseUrl: config.aosApiBaseUrl,
-        foregroundType: config.aosForegroundType || "",
-        crop: config.aosCrop === 1 ? 1 : 0,
-        format: config.aosFormat === "jpg" ? "jpg" : "png",
-      });
-
-      if (!result.success || !result.imageBuffer) {
-        const detail = result.error || "AOS处理失败";
-        const friendlyMessage = getAosFriendlyErrorMessage(detail);
-        return NextResponse.json(
-          { error: "抠图处理失败", detail: friendlyMessage || detail },
-          { status: friendlyMessage ? 400 : 500 }
-        );
-      }
-
-      resultBuffer = result.imageBuffer;
-      resultBase64 = resultBuffer.toString("base64");
-      processingTime = result.processing_time || 0;
-    } else {
-      // 使用 RMBG-2.0 API
-      const result = await processWithRMBG(imageBase64, {
-        apiUrl: config.apiUrl!,
-        apiKey: config.apiKey,
-      });
-      
-      if (!result.success || !result.image_base64) {
-        return NextResponse.json(
-          { error: "抠图处理失败", detail: result.error },
-          { status: 500 }
-        );
-      }
-      
-      resultBase64 = result.image_base64;
-      resultBuffer = Buffer.from(resultBase64, "base64");
-      processingTime = result.processing_time || 0;
-    }
-
-    // 4. 上传处理后的图片到S3
-    let thumbnailUrl: string;
-    let originalUrl: string;
-    
-    try {
-      const uploadResult = await uploadBufferToS3(resultBuffer, "image/png");
-      thumbnailUrl = uploadResult.thumbnail;
-      originalUrl = uploadResult.original;
-      console.log(`[RMBG] ✅ Images uploaded to S3 successfully`);
-    } catch (uploadError) {
-      console.error("[RMBG] ❌ Failed to upload to S3:", uploadError);
       return NextResponse.json(
         {
-          error: "图片上传到存储桶失败", 
+          error: error.message,
-          detail: uploadError instanceof Error ? uploadError.message : "未知错误" 
+          detail: error.detail || error.message,
         },
-        { status: 500 }
+        { status: error.status }
       );
     }
 
-    // 5. 保存图片记录到数据库（可选）
-    if (!skipGallerySave) {
-      let saved = false;
-      let saveError: unknown = null;
-      let savedImage:
-        | {
-            id: string;
-          }
-        | null = null;
-      for (let attempt = 1; attempt <= 3; attempt += 1) {
-        try {
-          ([savedImage] = await db.insert(generatedImage).values({
-            userId,
-            chatId: chatId || null,
-            messageId: messageId || null,
-            thumbnailUrl,
-            originalUrl,
-            imageSize: "2K",
-            prompt: prompt || "抠图处理",
-            modelId: provider === "photoroom" ? "photoroom-hd" : provider === "aoscdn" ? "aos-segmentation" : "rmbg-2.0",
-          }).returning());
-          console.log(`[RMBG] ✅ 图片已保存到相册，ID: ${savedImage.id}`);
-          saved = true;
-          break;
-        } catch (dbError) {
-          saveError = dbError;
-          if (attempt < 3) {
-            await sleep(120 * attempt);
-          }
-        }
-      }
-      if (!saved) {
-        console.error("[RMBG] ❌ 保存到数据库失败:", saveError);
-        throw new Error("图片处理成功但保存到相册失败，请稍后重试");
-      }
-      if (savedImage) {
-        try {
-          const sourceAssets =
-            sourceImageUrl
-              ? await getMediaAssetsByUserAndUrls({
-                  userId,
-                  urls: [sourceImageUrl],
-                })
-              : [];
-          const modelId =
-            provider === "photoroom"
-              ? "photoroom-hd"
-              : provider === "aoscdn"
-                ? "aos-segmentation"
-                : "rmbg-2.0";
-          const media = await upsertMediaAsset({
-            userId,
-            chatId,
-            mediaType: "image",
-            sourceType: "edited",
-            status: "ready",
-            originalUrl,
-            previewUrl: originalUrl,
-            thumbnailUrl,
-            displayName: (prompt || "抠图处理").slice(0, 80),
-            prompt: prompt || "抠图处理",
-            modelId,
-            sourceMessageId: messageId,
-            sourceTable: "GeneratedImage",
-            sourceRowId: savedImage.id,
-            primaryParentAssetId: sourceAssets[0]?.id ?? null,
-            metadata: {
-              provider,
-              imageSize: "2K",
-            },
-          });
-          if (media) {
-            for (const sourceAsset of sourceAssets) {
-              await createMediaAssetRelation({
-                userId,
-                chatId,
-                fromAssetId: sourceAsset.id,
-                toAssetId: media.id,
-                relationType: "edited_from",
-                sourceMessageId: messageId,
-                metadata: {
-                  prompt: prompt || "抠图处理",
-                  provider,
-                },
-              });
-            }
-          }
-        } catch (assetError) {
-          console.error("[RMBG] ⚠️ MediaAsset 注册失败:", assetError);
-        }
-      }
-    } else {
-      console.log("[RMBG] Skip gallery save by request flag");
-    }
-
-    // 6. 返回结果
-    return NextResponse.json({
-      success: true,
-      image_base64: resultBase64,
-      thumbnail_url: thumbnailUrl,
-      original_url: originalUrl,
-      processing_time: processingTime,
-      provider: provider,
-    });
-  } catch (error) {
     console.error("[RMBG API] 处理错误:", error);
     return NextResponse.json(
       { error: "服务器内部错误", detail: error instanceof Error ? error.message : "未知错误" },

lib/ai/rmbg/service.ts

@@ -0,0 +1,641 @@
+import {
+  createMediaAssetRelation,
+  getMediaAssetsByUserAndUrls,
+  getSystemSetting,
+  upsertMediaAsset,
+} from "@/lib/db/queries";
+import { db } from "@/lib/db";
+import { generatedImage } from "@/lib/db/schema";
+import { uploadFile } from "@/lib/storage/service";
+
+export type RmbgProvider = "rmbg" | "photoroom" | "aoscdn";
+
+type RmbgConfig = {
+  provider?: RmbgProvider;
+  apiUrl?: string;
+  apiKey?: string;
+  photoroomApiKey?: string;
+  aosApiKey?: string;
+  aosApiBaseUrl?: string;
+  aosForegroundType?: "" | "person" | "object" | "stamp";
+  aosCrop?: 0 | 1;
+  aosFormat?: "png" | "jpg";
+};
+
+export type ExecuteRmbgJobParams = {
+  userId: string;
+  imageBuffer: Buffer;
+  imageBase64?: string;
+  prompt?: string;
+  chatId?: string | null;
+  messageId?: string | null;
+  skipGallerySave?: boolean;
+  sourceImageUrl?: string | null;
+};
+
+export type ExecuteRmbgJobResult = {
+  image_base64: string;
+  thumbnail_url: string;
+  original_url: string;
+  processing_time: number;
+  provider: RmbgProvider;
+};
+
+export class RmbgServiceError extends Error {
+  status: number;
+  detail?: string;
+
+  constructor(message: string, status = 500, detail?: string) {
+    super(message);
+    this.name = "RmbgServiceError";
+    this.status = status;
+    this.detail = detail;
+  }
+}
+
+const sleep = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));
+const AOS_MAX_RESOLUTION = 4096;
+const AOS_CREATE_TIMEOUT_MS = 120_000;
+const AOS_POLL_TIMEOUT_MS = 60_000;
+const AOS_DOWNLOAD_TIMEOUT_MS = 60_000;
+
+async function createThumbnail(buffer: Buffer, mimeType: string): Promise<Buffer> {
+  try {
+    const sharp = await import("sharp");
+
+    return await sharp.default(buffer)
+      .resize(500, null, {
+        fit: "inside",
+        withoutEnlargement: true,
+      })
+      .png({ quality: 80 })
+      .toBuffer();
+  } catch (error) {
+    console.error("[RMBG] Failed to create thumbnail:", error);
+    return buffer;
+  }
+}
+
+async function uploadBufferToS3(
+  buffer: Buffer,
+  mimeType: string = "image/png"
+): Promise<{ thumbnail: string; original: string }> {
+  try {
+    const ext = mimeType.split("/")[1] || "png";
+    const timestamp = Date.now();
+    const randomStr = Math.random().toString(36).slice(2, 8);
+    const thumbnailFilename = `rmbg-thumb-${timestamp}-${randomStr}.${ext}`;
+    const originalFilename = `rmbg-orig-${timestamp}-${randomStr}.${ext}`;
+
+    const thumbnailBuffer = await createThumbnail(buffer, mimeType);
+
+    const thumbnailArrayBuffer = thumbnailBuffer.buffer.slice(
+      thumbnailBuffer.byteOffset,
+      thumbnailBuffer.byteOffset + thumbnailBuffer.byteLength
+    ) as ArrayBuffer;
+    const originalArrayBuffer = buffer.buffer.slice(
+      buffer.byteOffset,
+      buffer.byteOffset + buffer.byteLength
+    ) as ArrayBuffer;
+
+    const [thumbnailResult, originalResult] = await Promise.all([
+      uploadFile(thumbnailFilename, thumbnailArrayBuffer),
+      uploadFile(originalFilename, originalArrayBuffer),
+    ]);
+
+    return {
+      thumbnail: thumbnailResult.url,
+      original: originalResult.url,
+    };
+  } catch (error) {
+    console.error("[RMBG] Failed to upload to S3:", error);
+    throw new RmbgServiceError(
+      "图片上传到存储桶失败",
+      500,
+      error instanceof Error ? error.message : "未知错误"
+    );
+  }
+}
+
+const withTimeout = async <T,>(
+  fn: (signal: AbortSignal) => Promise<T>,
+  timeoutMs: number
+): Promise<T> => {
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), timeoutMs);
+  try {
+    return await fn(controller.signal);
+  } finally {
+    clearTimeout(timeoutId);
+  }
+};
+
+function getAosFriendlyErrorMessage(detail: string): string | null {
+  const resolutionMatch = detail.match(/resolution excess,\s*width=(\d+),\s*height=(\d+)/i);
+  if (resolutionMatch) {
+    const [, width, height] = resolutionMatch;
+    return `图片分辨率超限（${width}x${height}），AOS要求宽高都不超过 ${AOS_MAX_RESOLUTION}px。请缩小后重试。`;
+  }
+
+  if (/invalid file/i.test(detail)) {
+    return "图片文件无法识别，请尝试转换为 JPG/PNG 后重试。";
+  }
+
+  return null;
+}
+
+async function prepareImageForAos(
+  imageBuffer: Buffer
+): Promise<{ buffer: Buffer; mimeType: string; filename: string }> {
+  try {
+    const sharp = await import("sharp");
+    const image = sharp.default(imageBuffer);
+    const metadata = await image.metadata();
+    const width = metadata.width;
+    const height = metadata.height;
+    const format = (metadata.format || "png").toLowerCase();
+
+    const ext = format === "jpeg" ? "jpg" : format;
+    const filenameExt =
+      ext === "jpg" || ext === "png" || ext === "webp" || ext === "tiff" ? ext : "png";
+    const mimeType =
+      ext === "jpg"
+        ? "image/jpeg"
+        : ext === "webp"
+          ? "image/webp"
+          : ext === "tiff"
+            ? "image/tiff"
+            : "image/png";
+
+    if (!width || !height || (width <= AOS_MAX_RESOLUTION && height <= AOS_MAX_RESOLUTION)) {
+      return {
+        buffer: imageBuffer,
+        mimeType,
+        filename: `image.${filenameExt}`,
+      };
+    }
+
+    const resizedBuffer = await image
+      .resize(AOS_MAX_RESOLUTION, AOS_MAX_RESOLUTION, {
+        fit: "inside",
+        withoutEnlargement: true,
+      })
+      .toBuffer();
+
+    return {
+      buffer: resizedBuffer,
+      mimeType,
+      filename: `image.${filenameExt}`,
+    };
+  } catch (error) {
+    console.error("[AOS RMBG] 图片预处理失败，继续使用原图:", error);
+    return { buffer: imageBuffer, mimeType: "image/png", filename: "image.png" };
+  }
+}
+
+async function processWithRMBG(
+  imageBase64: string,
+  config: { apiUrl: string; apiKey?: string }
+): Promise<{ success: boolean; image_base64?: string; processing_time?: number; error?: string }> {
+  const apiUrl = config.apiUrl.endsWith("/")
+    ? `${config.apiUrl}rmbg/base64`
+    : `${config.apiUrl}/rmbg/base64`;
+
+  const headers: HeadersInit = {
+    "Content-Type": "application/json",
+  };
+
+  if (config.apiKey) {
+    headers["X-API-Key"] = config.apiKey;
+  }
+
+  const startTime = Date.now();
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), 30000);
+
+  try {
+    const response = await fetch(apiUrl, {
+      method: "POST",
+      headers,
+      body: JSON.stringify({ image_base64: imageBase64 }),
+      signal: controller.signal,
+    });
+
+    clearTimeout(timeoutId);
+    const processingTime = (Date.now() - startTime) / 1000;
+
+    if (!response.ok) {
+      const errorText = await response.text();
+      console.error("[RMBG API] 请求失败:", { status: response.status, error: errorText });
+      return { success: false, error: errorText || response.statusText };
+    }
+
+    const result = await response.json();
+    if (!result.success || !result.image_base64) {
+      return { success: false, error: result.detail || "未知错误" };
+    }
+
+    return {
+      success: true,
+      image_base64: result.image_base64,
+      processing_time: result.processing_time || processingTime,
+    };
+  } catch (error) {
+    clearTimeout(timeoutId);
+    if (error instanceof Error && error.name === "AbortError") {
+      return { success: false, error: "请求超时（30秒）" };
+    }
+    return { success: false, error: error instanceof Error ? error.message : "未知错误" };
+  }
+}
+
+async function processWithPhotoRoom(
+  imageBuffer: Buffer,
+  apiKey: string
+): Promise<{ success: boolean; imageBuffer?: Buffer; processing_time?: number; error?: string }> {
+  const startTime = Date.now();
+
+  try {
+    const formData = new FormData();
+    const uint8Array = new Uint8Array(imageBuffer);
+    const blob = new Blob([uint8Array], { type: "image/png" });
+    formData.append("imageFile", blob, "image.png");
+    formData.append("referenceBox", "originalImage");
+
+    const controller = new AbortController();
+    const timeoutId = setTimeout(() => controller.abort(), 60000);
+
+    const response = await fetch("https://image-api.photoroom.com/v2/edit", {
+      method: "POST",
+      headers: {
+        "x-api-key": apiKey,
+        "pr-hd-background-removal": "auto",
+      },
+      body: formData,
+      signal: controller.signal,
+    });
+
+    clearTimeout(timeoutId);
+    const processingTime = (Date.now() - startTime) / 1000;
+
+    if (!response.ok) {
+      const errorText = await response.text();
+      console.error("[PhotoRoom API] 请求失败:", { status: response.status, error: errorText });
+      return { success: false, error: `PhotoRoom API错误: ${response.status} - ${errorText}` };
+    }
+
+    const resultBuffer = Buffer.from(await response.arrayBuffer());
+    return {
+      success: true,
+      imageBuffer: resultBuffer,
+      processing_time: processingTime,
+    };
+  } catch (error) {
+    if (error instanceof Error && error.name === "AbortError") {
+      return { success: false, error: "PhotoRoom请求超时（60秒）" };
+    }
+    console.error("[PhotoRoom] Error:", error);
+    return { success: false, error: error instanceof Error ? error.message : "未知错误" };
+  }
+}
+
+async function processWithAosSegmentation(
+  imageBuffer: Buffer,
+  config: {
+    apiKey: string;
+    apiBaseUrl?: string;
+    foregroundType?: "" | "person" | "object" | "stamp";
+    crop?: 0 | 1;
+    format?: "png" | "jpg";
+  }
+): Promise<{ success: boolean; imageBuffer?: Buffer; processing_time?: number; error?: string }> {
+  const startTime = Date.now();
+  const baseUrl = (config.apiBaseUrl || "https://techsz.aoscdn.com").replace(/\/+$/, "");
+  const createUrl = `${baseUrl}/api/tasks/visual/segmentation`;
+  const headers = { "X-API-KEY": config.apiKey };
+
+  try {
+    const normalizedImage = await prepareImageForAos(imageBuffer);
+    const createForm = new FormData();
+    const imageBlob = new Blob([new Uint8Array(normalizedImage.buffer)], { type: normalizedImage.mimeType });
+    createForm.append("image_file", imageBlob, normalizedImage.filename);
+    createForm.append("sync", "0");
+    createForm.append("return_type", "1");
+    createForm.append("output_type", "2");
+    createForm.append("format", config.format || "png");
+    createForm.append("crop", config.crop === 1 ? "1" : "0");
+    if (config.foregroundType) {
+      createForm.append("type", config.foregroundType);
+    }
+
+    const createResponse = await withTimeout(
+      (signal) =>
+        fetch(createUrl, {
+          method: "POST",
+          headers,
+          body: createForm,
+          signal,
+        }),
+      AOS_CREATE_TIMEOUT_MS
+    );
+
+    const createPayload = await createResponse.json().catch(() => null);
+    if (!createResponse.ok || !createPayload?.data?.task_id) {
+      return {
+        success: false,
+        error: `AOS任务创建失败: ${createPayload?.message || createResponse.statusText}`,
+      };
+    }
+
+    const taskId = createPayload.data.task_id as string;
+    const taskUrl = `${createUrl}/${taskId}`;
+    const maxPollCount = 60;
+
+    for (let pollCount = 0; pollCount < maxPollCount; pollCount += 1) {
+      await sleep(1000);
+
+      const pollResponse = await withTimeout(
+        (signal) =>
+          fetch(taskUrl, {
+            method: "GET",
+            headers,
+            signal,
+          }),
+        AOS_POLL_TIMEOUT_MS
+      );
+
+      const pollPayload = await pollResponse.json().catch(() => null);
+      if (!pollResponse.ok || !pollPayload?.data) {
+        return {
+          success: false,
+          error: `AOS任务查询失败: ${pollPayload?.message || pollResponse.statusText}`,
+        };
+      }
+
+      const state = Number(pollPayload.data.state);
+      const imageUrl = pollPayload.data.image as string | undefined;
+      const stateDetail = String(pollPayload.data.state_detail || "");
+      const errMessage = String(pollPayload.data.err_message || pollPayload.data.err_info || "");
+
+      if (state === 1 && imageUrl) {
+        const imageResponse = await withTimeout(
+          (signal) =>
+            fetch(imageUrl, {
+              method: "GET",
+              signal,
+            }),
+          AOS_DOWNLOAD_TIMEOUT_MS
+        );
+
+        if (!imageResponse.ok) {
+          return {
+            success: false,
+            error: `AOS结果下载失败: ${imageResponse.status} ${imageResponse.statusText}`,
+          };
+        }
+
+        const resultBuffer = Buffer.from(await imageResponse.arrayBuffer());
+        return {
+          success: true,
+          imageBuffer: resultBuffer,
+          processing_time: (Date.now() - startTime) / 1000,
+        };
+      }
+
+      if (state < 0) {
+        return {
+          success: false,
+          error: `AOS任务失败: ${errMessage || stateDetail || pollPayload?.message || "状态异常"}`,
+        };
+      }
+    }
+
+    return { success: false, error: "AOS任务超时（最多60秒）" };
+  } catch (error) {
+    if (error instanceof Error && error.name === "AbortError") {
+      return { success: false, error: "AOS请求超时，请稍后重试" };
+    }
+    return { success: false, error: error instanceof Error ? error.message : "未知错误" };
+  }
+}
+
+async function getValidatedRmbgConfig(): Promise<{ provider: RmbgProvider; config: RmbgConfig }> {
+  const rmbgConfig = await getSystemSetting({ key: "rmbg_api_config" });
+
+  if (!rmbgConfig || !rmbgConfig.value) {
+    throw new RmbgServiceError("抠图API配置未设置，请在系统设置中配置", 400);
+  }
+
+  const config = rmbgConfig.value as RmbgConfig;
+  const provider: RmbgProvider = config.provider || "rmbg";
+
+  if (provider === "rmbg" && !config.apiUrl) {
+    throw new RmbgServiceError("RMBG API地址未配置", 400);
+  }
+
+  if (provider === "photoroom" && !config.photoroomApiKey) {
+    throw new RmbgServiceError("PhotoRoom API密钥未配置", 400);
+  }
+
+  if (provider === "aoscdn" && !config.aosApiKey) {
+    throw new RmbgServiceError("AOS API密钥未配置", 400);
+  }
+
+  return { provider, config };
+}
+
+function getModelId(provider: RmbgProvider) {
+  return provider === "photoroom"
+    ? "photoroom-hd"
+    : provider === "aoscdn"
+      ? "aos-segmentation"
+      : "rmbg-2.0";
+}
+
+export async function fetchImageBufferFromUrl(imageUrl: string): Promise<Buffer> {
+  try {
+    const imageResponse = await fetch(imageUrl);
+    if (!imageResponse.ok) {
+      throw new RmbgServiceError(
+        `无法获取图片: ${imageResponse.status} ${imageResponse.statusText}`,
+        400
+      );
+    }
+    return Buffer.from(await imageResponse.arrayBuffer());
+  } catch (error) {
+    if (error instanceof RmbgServiceError) {
+      throw error;
+    }
+    console.error("[RMBG] 获取图片失败:", error);
+    throw new RmbgServiceError("无法获取图片，请检查图片链接是否有效", 400);
+  }
+}
+
+export async function executeRmbgJob(
+  params: ExecuteRmbgJobParams
+): Promise<ExecuteRmbgJobResult> {
+  const {
+    userId,
+    imageBuffer,
+    imageBase64 = imageBuffer.toString("base64"),
+    prompt = "抠图处理",
+    chatId = null,
+    messageId = null,
+    skipGallerySave = false,
+    sourceImageUrl = null,
+  } = params;
+
+  const { provider, config } = await getValidatedRmbgConfig();
+  console.log(`[RMBG] Using provider: ${provider}`);
+
+  let resultBuffer: Buffer;
+  let resultBase64: string;
+  let processingTime: number;
+
+  if (provider === "photoroom") {
+    const result = await processWithPhotoRoom(imageBuffer, config.photoroomApiKey!);
+    if (!result.success || !result.imageBuffer) {
+      throw new RmbgServiceError("抠图处理失败", 500, result.error);
+    }
+    resultBuffer = result.imageBuffer;
+    resultBase64 = resultBuffer.toString("base64");
+    processingTime = result.processing_time || 0;
+  } else if (provider === "aoscdn") {
+    const result = await processWithAosSegmentation(imageBuffer, {
+      apiKey: config.aosApiKey!,
+      apiBaseUrl: config.aosApiBaseUrl,
+      foregroundType: config.aosForegroundType || "",
+      crop: config.aosCrop === 1 ? 1 : 0,
+      format: config.aosFormat === "jpg" ? "jpg" : "png",
+    });
+
+    if (!result.success || !result.imageBuffer) {
+      const detail = result.error || "AOS处理失败";
+      const friendlyMessage = getAosFriendlyErrorMessage(detail);
+      throw new RmbgServiceError("抠图处理失败", friendlyMessage ? 400 : 500, friendlyMessage || detail);
+    }
+
+    resultBuffer = result.imageBuffer;
+    resultBase64 = resultBuffer.toString("base64");
+    processingTime = result.processing_time || 0;
+  } else {
+    const result = await processWithRMBG(imageBase64, {
+      apiUrl: config.apiUrl!,
+      apiKey: config.apiKey,
+    });
+
+    if (!result.success || !result.image_base64) {
+      throw new RmbgServiceError("抠图处理失败", 500, result.error);
+    }
+
+    resultBase64 = result.image_base64;
+    resultBuffer = Buffer.from(resultBase64, "base64");
+    processingTime = result.processing_time || 0;
+  }
+
+  const uploadResult = await uploadBufferToS3(resultBuffer, "image/png");
+  const thumbnailUrl = uploadResult.thumbnail;
+  const originalUrl = uploadResult.original;
+
+  if (!skipGallerySave) {
+    let saved = false;
+    let saveError: unknown = null;
+    let savedImage:
+      | {
+          id: string;
+        }
+      | null = null;
+
+    for (let attempt = 1; attempt <= 3; attempt += 1) {
+      try {
+        [savedImage] = await db
+          .insert(generatedImage)
+          .values({
+            userId,
+            chatId,
+            messageId,
+            thumbnailUrl,
+            originalUrl,
+            imageSize: "2K",
+            prompt,
+            modelId: getModelId(provider),
+          })
+          .returning();
+        saved = true;
+        break;
+      } catch (dbError) {
+        saveError = dbError;
+        if (attempt < 3) {
+          await sleep(120 * attempt);
+        }
+      }
+    }
+
+    if (!saved) {
+      console.error("[RMBG] ❌ 保存到数据库失败:", saveError);
+      throw new RmbgServiceError("图片处理成功但保存到相册失败，请稍后重试", 500);
+    }
+
+    if (savedImage) {
+      try {
+        const sourceAssets = sourceImageUrl
+          ? await getMediaAssetsByUserAndUrls({
+              userId,
+              urls: [sourceImageUrl],
+            })
+          : [];
+
+        const media = await upsertMediaAsset({
+          userId,
+          chatId,
+          mediaType: "image",
+          sourceType: "edited",
+          status: "ready",
+          originalUrl,
+          previewUrl: originalUrl,
+          thumbnailUrl,
+          displayName: prompt.slice(0, 80),
+          prompt,
+          modelId: getModelId(provider),
+          sourceMessageId: messageId,
+          sourceTable: "GeneratedImage",
+          sourceRowId: savedImage.id,
+          primaryParentAssetId: sourceAssets[0]?.id ?? null,
+          metadata: {
+            provider,
+            imageSize: "2K",
+          },
+        });
+
+        if (media) {
+          for (const sourceAsset of sourceAssets) {
+            await createMediaAssetRelation({
+              userId,
+              chatId,
+              fromAssetId: sourceAsset.id,
+              toAssetId: media.id,
+              relationType: "edited_from",
+              sourceMessageId: messageId,
+              metadata: {
+                prompt,
+                provider,
+              },
+            });
+          }
+        }
+      } catch (assetError) {
+        console.error("[RMBG] ⚠️ MediaAsset 注册失败:", assetError);
+      }
+    }
+  } else {
+    console.log("[RMBG] Skip gallery save by request flag");
+  }
+
+  return {
+    image_base64: resultBase64,
+    thumbnail_url: thumbnailUrl,
+    original_url: originalUrl,
+    processing_time: processingTime,
+    provider,
+  };
+}