44 lines
1.2 KiB
TypeScript
44 lines
1.2 KiB
TypeScript
import sharp from 'sharp'
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const DEFAULT_SHARP_CONCURRENCY = 1
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const MAX_SHARP_CONCURRENCY = 2
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const SHARP_CACHE_MEMORY_MB = 128
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const SHARP_CACHE_ITEMS = 64
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function readConcurrency(): number {
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const configured = Number.parseInt(process.env.SHARP_CONCURRENCY || '', 10)
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if (!Number.isFinite(configured)) {
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return DEFAULT_SHARP_CONCURRENCY
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}
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return Math.max(1, Math.min(MAX_SHARP_CONCURRENCY, configured))
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}
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let configured = false
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/**
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* Sharp 的原生解码/编码内存不受 Node old-space 完全约束。
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* 生产应用与 Next.js 共用一个容器，因此默认只允许一个 Sharp 任务，
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* 并关闭磁盘缓存、限制内存缓存，避免并发图片请求把宿主机推入 OOM。
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*/
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export function configureSharpRuntime(): void {
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if (configured) {
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return
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}
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// 测试或极简运行时可能只提供 sharp() 工厂，没有全局调优方法；
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// 这时保留原有行为，不让配置本身阻断业务。
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if (typeof sharp.concurrency !== 'function' || typeof sharp.cache !== 'function') {
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configured = true
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return
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}
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sharp.concurrency(readConcurrency())
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sharp.cache({
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memory: SHARP_CACHE_MEMORY_MB,
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items: SHARP_CACHE_ITEMS,
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files: 0,
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})
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configured = true
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}
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