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30 lines
879 B
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30 lines
879 B
Plaintext
---
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title: Dynamic WASM compilation is not available in Proxies
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---
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## Why This Error Occurred
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Compiling WASM binaries dynamically is not allowed in Proxies. Specifically,
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the following APIs are not supported:
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- `WebAssembly.compile`
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- `WebAssembly.instantiate` with [a buffer parameter](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiate#primary_overload_%E2%80%94_taking_wasm_binary_code)
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## Possible Ways to Fix It
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Bundle your WASM binaries using `import`:
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```ts filename="proxy.ts"
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import { NextResponse } from 'next/server'
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import squareWasm from './square.wasm?module'
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export default async function proxy() {
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const m = await WebAssembly.instantiate(squareWasm)
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const answer = m.exports.square(9)
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const response = NextResponse.next()
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response.headers.set('x-square', answer.toString())
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return response
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}
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```
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