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@@ -238,6 +238,32 @@ export class FileService {
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}
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}
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+ /**
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+ * 获取图片缩略图签名URL（降低分辨率）
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+ * @param key 文件key
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+ * @param width 宽度，默认400px
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+ * @param quality 质量，默认80
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+ * @param expires 过期时间（秒），默认24小时
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+ * @returns 签名URL
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+ */
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+ async getImageThumbnailUrl(
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+ key: string,
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+ width: number = 400,
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+ quality: number = 80,
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+ expires: number = 24 * 60 * 60
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+ ): Promise<string> {
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+ try {
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+ const process = `image/resize,w_${width}/quality,q_${quality}`
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+ const url = await this.ossClient.signatureUrl(key, {
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+ expires: expires,
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+ process: process
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+ })
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+ return url
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+ } catch (error) {
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+ throw new Error(`获取图片缩略图URL失败: ${error instanceof Error ? error.message : '未知错误'}`)
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+ }
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+ }
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+
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/**
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* 检查文件是否存在
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* @param key 文件key
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