sw.js.map

{
  "version": 3,
  "sources": ["../webapp/modules/sw.ts"],
  "sourcesContent": ["const WRITE = 0;\r\nconst PULL = 0;\r\nconst ERROR = 1;\r\nconst ABORT = 1;\r\nconst CLOSE = 2;\r\n\r\nclass MessagePortSource implements UnderlyingSource {\r\n    private controller?: ReadableStreamController<any>;\r\n\r\n    constructor (private readonly port: MessagePort) {\r\n        this.port.onmessage = evt => this.onMessage(evt.data);\r\n    }\r\n\r\n    start (controller: ReadableStreamController<any>) {\r\n        this.controller = controller;\r\n    }\r\n\r\n    cancel (reason: Error) {\r\n    // Firefox can notify a cancel event, chrome can't\r\n    // https://bugs.chromium.org/p/chromium/issues/detail?id=638494\r\n        this.port.postMessage({ type: ERROR, reason: reason.message });\r\n        this.port.close();\r\n    }\r\n\r\n    onMessage (message: { type: number; chunk: Uint8Array; reason: any }) {\r\n    // enqueue() will call pull() if needed when there's no backpressure\r\n        if (!this.controller) {\r\n            return;\r\n        }\r\n        if (message.type === WRITE) {\r\n            this.controller.enqueue(message.chunk);\r\n            this.port.postMessage({ type: PULL });\r\n        }\r\n        if (message.type === ABORT) {\r\n            this.controller.error(message.reason);\r\n            this.port.close();\r\n        }\r\n        if (message.type === CLOSE) {\r\n            this.controller.close();\r\n            this.port.close();\r\n        }\r\n    }\r\n}\r\n\r\nself.addEventListener(\"install\", () => {\r\n    (self as any).skipWaiting();\r\n});\r\n\r\nself.addEventListener(\"activate\", event /* ExtendableEvent */ => {\r\n    (event as any).waitUntil((self as any).clients.claim());\r\n});\r\n\r\nconst map = new Map();\r\n\r\n// This should be called once per download\r\n// Each event has a dataChannel that the data will be piped through\r\nglobalThis.addEventListener(\"message\", evt => {\r\n    const data = evt.data;\r\n    if (data.url && data.readablePort) {\r\n        data.rs = new ReadableStream(\r\n            new MessagePortSource(evt.data.readablePort),\r\n            new CountQueuingStrategy({ highWaterMark: 4 })\r\n        );\r\n        map.set(data.url, data);\r\n    }\r\n});\r\n\r\nglobalThis.addEventListener(\"fetch\", evt => {\r\n    const url = (evt as any).request.url;\r\n    const data = map.get(url);\r\n    if (!data) return null;\r\n    map.delete(url);\r\n    (evt as any).respondWith(new Response(data.rs, {\r\n        headers: data.headers\r\n    }));\r\n});\r\n\r\nexport {};\r\n"],
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  "names": ["MessagePortSource", "port", "evt", "controller", "reason", "message", "event", "map", "data", "url"]
}