103 lines
3.3 KiB
TypeScript
103 lines
3.3 KiB
TypeScript
import { NextRequest, NextResponse } from "next/server";
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import { auth } from "@/app/(auth)/auth";
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import {
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buildAttachmentContentDisposition,
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fetchCanvasDownloadAsset,
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sanitizeCanvasDownloadFileName,
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} from "@/lib/canvas/photoshop-safe-download";
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export const runtime = "nodejs";
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export const maxDuration = 120;
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function getRequestOrigin(request: NextRequest): string {
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const forwardedHost = (request.headers.get("x-forwarded-host") || "").split(",")[0]?.trim();
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const forwardedProto = (request.headers.get("x-forwarded-proto") || "").split(",")[0]?.trim();
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if (forwardedHost && forwardedProto) {
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return `${forwardedProto}://${forwardedHost}`;
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}
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return new URL(request.url).origin;
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}
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function resolveDownloadUrl(rawUrl: unknown, origin: string): string {
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const value = String(rawUrl || "").trim();
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if (!value) return "";
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try {
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const parsed = new URL(value, origin);
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if (!/^https?:$/i.test(parsed.protocol)) return "";
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return parsed.toString();
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} catch (_error) {
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return "";
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}
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}
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function resolveDownloadUrls(body: Record<string, unknown>, origin: string): string[] {
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const rawCandidates = Array.isArray(body.urls) ? body.urls : [body.url];
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const urls: string[] = [];
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const seen = new Set<string>();
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for (const rawUrl of rawCandidates) {
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const url = resolveDownloadUrl(rawUrl, origin);
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if (!url || seen.has(url)) continue;
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seen.add(url);
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urls.push(url);
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}
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return urls.slice(0, 6);
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}
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export async function POST(request: NextRequest) {
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try {
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const session = await auth();
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if (!session?.user?.id) {
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return NextResponse.json({ success: false, error: "未登录" }, { status: 401 });
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}
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const body = (await request.json().catch(() => ({}))) as Record<string, unknown>;
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const requestOrigin = getRequestOrigin(request);
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const urls = resolveDownloadUrls(body, requestOrigin);
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if (urls.length === 0) {
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return NextResponse.json({ success: false, error: "图片地址无效" }, { status: 400 });
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}
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const name = sanitizeCanvasDownloadFileName(String(body.name || ""), "canvas-image");
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const cookie = request.headers.get("cookie") || "";
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let result: Awaited<ReturnType<typeof fetchCanvasDownloadAsset>> | null = null;
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const failures: string[] = [];
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for (const url of urls) {
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result = await fetchCanvasDownloadAsset({
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file: { url, name },
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index: 0,
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requestOrigin,
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cookie,
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includeSequencePrefix: false,
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});
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if (result.ok) break;
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failures.push(`${url}: ${result.error}`);
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}
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if (!result?.ok) {
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if (failures.length > 0) {
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console.warn("[CanvasDownloadImage] All candidates failed:", failures);
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}
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return NextResponse.json(
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{ success: false, error: result?.error || "图片源文件暂时不可访问" },
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{ status: 502 }
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);
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}
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return new NextResponse(result.bytes, {
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status: 200,
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headers: {
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"Content-Type": result.contentType,
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"Content-Length": String(result.bytes.length),
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"Content-Disposition": buildAttachmentContentDisposition(result.filename),
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"Cache-Control": "no-store",
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},
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});
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} catch (error) {
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console.error("[CanvasDownloadImage] Failed:", error);
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return NextResponse.json({ success: false, error: "图片下载失败" }, { status: 500 });
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}
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}
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