{"version":3,"file":"mf.mjs","names":[],"sources":["../src/mf.ts"],"sourcesContent":["import { createInstance, getInstance } from \"@module-federation/enhanced/runtime\";\nimport { setGlobalFederationInstance } from \"@module-federation/runtime-core\";\nimport { computeSriHash, type IntegrityRegistry } from \"./integrity\";\n\ntype FederationInstance = ReturnType;\n\nlet mfInstance: FederationInstance | null = null;\n\nfunction fetchWithTimeout(url: string, init: RequestInit, timeoutMs: number): Promise {\n const controller = new AbortController();\n const timer = setTimeout(() => controller.abort(), timeoutMs);\n return fetch(url, { ...init, signal: controller.signal }).finally(() => clearTimeout(timer));\n}\n\nexport function patchManifestFetchForSsrPublicPath(mf: FederationInstance): void {\n if (!mf || !(mf as any).loaderHook?.lifecycle?.fetch?.on) return;\n if ((mf as any).__everythingDevPatchedManifestFetch === true) return;\n (mf as any).__everythingDevPatchedManifestFetch = true;\n\n (mf as any).loaderHook.lifecycle.fetch.on((url: unknown, init: unknown) => {\n if (typeof url !== \"string\" || !url.endsWith(\"/mf-manifest.json\")) {\n return;\n }\n return fetchWithTimeout(url as string, init as RequestInit, 15_000)\n .then((res) => res.json())\n .then((json: any) => {\n json.metaData = json.metaData ?? {};\n json.metaData.ssrPublicPath =\n json.metaData.ssrPublicPath ?? url.replace(/\\/mf-manifest\\.json$/, \"/\");\n if (json.metaData.publicPath === \"auto\" || json.metaData.publicPath === \"\") {\n json.metaData.publicPath = \"/\";\n }\n return new Response(JSON.stringify(json), {\n headers: { \"content-type\": \"application/json\" },\n });\n });\n });\n}\n\nexport function installIntegrityFetchHook(\n mf: FederationInstance,\n registry: IntegrityRegistry,\n): void {\n if (!mf || !(mf as any).loaderHook?.lifecycle?.fetch?.on) {\n console.warn(\"[SRI] MF lifecycle fetch hook not available, skipping integrity-in-pipeline\");\n return;\n }\n if ((mf as any).__everythingDevIntegrityHook === true) return;\n (mf as any).__everythingDevIntegrityHook = true;\n\n (mf as any).loaderHook.lifecycle.fetch.on((url: unknown, init: unknown) => {\n if (typeof url !== \"string\") return;\n\n const expectedHash = registry.get(url);\n if (!expectedHash) return;\n\n return fetchWithTimeout(url as string, init as RequestInit, 15_000).then(async (res) => {\n const buffer = Buffer.from(await res.arrayBuffer());\n const computed = computeSriHash(buffer);\n\n if (computed !== expectedHash) {\n console.error(\n `[SRI] Integrity check failed in MF fetch pipeline for ${url}\\n Expected: ${expectedHash}\\n Computed: ${computed}`,\n );\n return new Response(`Integrity check failed for ${url}`, {\n status: 500,\n statusText: \"Integrity Check Failed\",\n });\n }\n\n console.log(`[SRI] Integrity verified in pipeline for ${url}`);\n return new Response(buffer, {\n status: res.status,\n statusText: res.statusText,\n headers: res.headers,\n });\n });\n });\n}\n\nexport function getFederationInstance(): FederationInstance {\n if (mfInstance) return mfInstance;\n\n const existing = getInstance();\n if (existing) {\n mfInstance = existing as FederationInstance;\n setGlobalFederationInstance(mfInstance as any);\n patchManifestFetchForSsrPublicPath(mfInstance);\n return mfInstance;\n }\n\n mfInstance = createInstance({\n name: \"host\",\n remotes: [],\n }) as FederationInstance;\n setGlobalFederationInstance(mfInstance as any);\n patchManifestFetchForSsrPublicPath(mfInstance);\n return mfInstance;\n}\n\nexport async function registerRemote(opts: {\n name: string;\n entry: string;\n type?: \"manifest\" | \"script\";\n}): Promise {\n const instance = getFederationInstance();\n\n const inferType = (): \"manifest\" | \"script\" => {\n if (opts.type) return opts.type;\n if (opts.entry.endsWith(\"/mf-manifest.json\")) return \"manifest\";\n if (opts.entry.endsWith(\"/remoteEntry.js\")) return \"script\";\n return typeof window === \"undefined\" ? 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