36 lines
1.5 KiB
TypeScript
36 lines
1.5 KiB
TypeScript
/** Downloads through the authenticated canvas export route, including cross-origin media. */
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export async function downloadCanvasMedia(files: Array<{ url: string; name: string }>) {
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if (!files.length) throw Error("没有可下载的素材");
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if (files.length > 200) throw Error("每次最多下载 200 项，请分批选择");
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const batch = files.length > 1;
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const response = await fetch(batch ? "/api/canvas/download-zip" : "/api/canvas/download-image", {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify(batch ? { files, folderName: "画布素材" } : files[0]),
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signal: AbortSignal.timeout(300000),
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});
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if (!response.ok) {
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const data = await response.json().catch(() => ({}));
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throw Error(data.error || "素材下载失败");
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}
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const blob = await response.blob();
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if (!blob.size) throw Error("返回的下载文件为空");
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const encodedName = response.headers
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.get("content-disposition")
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?.match(/filename\*=UTF-8''([^;]+)/i)?.[1];
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const filename = encodedName
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? decodeURIComponent(encodedName)
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: batch
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? "画布素材.zip"
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: files[0].name;
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const url = URL.createObjectURL(blob);
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const link = document.createElement("a");
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link.href = url;
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link.download = filename;
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document.body.appendChild(link);
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link.click();
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link.remove();
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window.setTimeout(() => URL.revokeObjectURL(url), 60000);
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return { failed: Number(response.headers.get("X-Download-Failed-Count") || 0) };
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}
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