fix: use uint8array for user's wasm modules used in middleware instead of base64 (#2740)

Author: pieh

edge-runtime/vendor.ts

@@ -2,7 +2,6 @@
 // It acts as a seed that populates the `vendor/` directory and should not be
 // imported directly.
 
-import 'https://deno.land/std@0.175.0/encoding/base64.ts'
 import 'https://deno.land/std@0.175.0/http/cookie.ts'
 import 'https://deno.land/std@0.175.0/node/buffer.ts'
 import 'https://deno.land/std@0.175.0/node/events.ts'

src/build/functions/edge.ts

@@ -1,6 +1,5 @@
 import { cp, mkdir, readFile, rm, writeFile } from 'node:fs/promises'
-import { dirname, join, relative, sep } from 'node:path'
-import { sep as posixSep } from 'node:path/posix'
+import { dirname, join } from 'node:path'
 
 import type { Manifest, ManifestFunction } from '@netlify/edge-functions'
 import { glob } from 'fast-glob'
@@ -9,8 +8,6 @@ import { pathToRegexp } from 'path-to-regexp'
 
 import { EDGE_HANDLER_NAME, PluginContext } from '../plugin-context.js'
 
-const toPosixPath = (path: string) => path.split(sep).join(posixSep)
-
 const writeEdgeManifest = async (ctx: PluginContext, manifest: Manifest) => {
   await mkdir(ctx.edgeFunctionsDir, { recursive: true })
   await writeFile(join(ctx.edgeFunctionsDir, 'manifest.json'), JSON.stringify(manifest, null, 2))
@@ -126,23 +123,9 @@ const copyHandlerDependencies = async (
   const outputFile = join(destDir, `server/${name}.js`)
 
   if (wasm?.length) {
-    const base64ModulePath = join(
-      destDir,
-      'edge-runtime/vendor/deno.land/std@0.175.0/encoding/base64.ts',
-    )
-
-    const base64ModulePathRelativeToOutputFile = toPosixPath(
-      relative(dirname(outputFile), base64ModulePath),
-    )
-
-    parts.push(`import { decode as _base64Decode } from "${base64ModulePathRelativeToOutputFile}";`)
     for (const wasmChunk of wasm ?? []) {
       const data = await readFile(join(srcDir, wasmChunk.filePath))
-      parts.push(
-        `const ${wasmChunk.name} = _base64Decode(${JSON.stringify(
-          data.toString('base64'),
-        )}).buffer`,
-      )
+      parts.push(`const ${wasmChunk.name} = Uint8Array.from(${JSON.stringify([...data])})`)
     }
   }