feat: add build for porting fetch to Node.js (#1183)

* feat: add build for porting to Node.js

* inline wasm

* Update package.json

build/wasm.js

@@ -1,6 +1,7 @@
 'use strict'
 
 const { execSync } = require('child_process')
+const { writeFileSync, readFileSync } = require('fs');
 const { join, resolve } = require('path')
 const { WASI_ROOT } = process.env
 
@@ -43,6 +44,12 @@ execSync(`${WASI_ROOT}/bin/clang \
  -I${join(WASM_SRC, 'include')} \
  -o ${join(WASM_OUT, 'llhttp.wasm')}`, { stdio: 'inherit' })
 
+const base64Wasm = readFileSync(join(WASM_OUT, 'llhttp.wasm')).toString('base64')
+writeFileSync(
+  join(WASM_OUT, 'llhttp.wasm.js'),
+  `module.exports = "${base64Wasm}";\n`
+)
+
 // Build wasm simd binary
 execSync(`${WASI_ROOT}/bin/clang \
  --sysroot=${WASI_ROOT}/share/wasi-sysroot \
@@ -64,3 +71,9 @@ execSync(`${WASI_ROOT}/bin/clang \
  ${join(WASM_SRC, 'src')}/*.c \
  -I${join(WASM_SRC, 'include')} \
  -o ${join(WASM_OUT, 'llhttp_simd.wasm')}`, { stdio: 'inherit' })
+
+const base64WasmSimd = readFileSync(join(WASM_OUT, 'llhttp_simd.wasm')).toString('base64')
+writeFileSync(
+  join(WASM_OUT, 'llhttp_simd.wasm.js'),
+  `module.exports = "${base64WasmSimd}";\n`
+)

lib/client.js

@@ -24,6 +24,8 @@ const {
   HTTPParserError
 } = require('./core/errors')
 const buildConnector = require('./core/connect')
+const llhttpWasmData = require('./llhttp/llhttp.wasm.js')
+const llhttpSimdWasmData = require('./llhttp/llhttp_simd.wasm.js')
 
 const {
   kUrl,
@@ -409,20 +411,17 @@ const constants = require('./llhttp/constants')
 const EMPTY_BUF = Buffer.alloc(0)
 
 async function lazyllhttp () {
-  const { resolve } = require('path')
-  const { readFile } = require('fs').promises
-
   let mod
   try {
-    mod = await WebAssembly.compile(await readFile(resolve(__dirname, './llhttp/llhttp_simd.wasm')))
+    mod = await WebAssembly.compile(Buffer.from(llhttpWasmData, 'base64'))
   } catch (e) {
     /* istanbul ignore next */
 
     // We could check if the error was caused by the simd option not
     // being enabled, but the occurring of this other error
     // * https://github.com/emscripten-core/emscripten/issues/11495
     // got me to remove that check to avoid breaking Node 12.
-    mod = await WebAssembly.compile(await readFile(resolve(__dirname, './llhttp/llhttp.wasm')))
+    mod = await WebAssembly.compile(Buffer.from(llhttpSimdWasmData, 'base64'))
   }
 
   return await WebAssembly.instantiate(mod, {

package.json

@@ -40,6 +40,7 @@
     "docs"
   ],
   "scripts": {
+    "build:node": "esbuild index.js --bundle --platform=node --outfile=undici.js",
     "prebuild:wasm": "docker build -t llhttp_wasm_builder -f build/Dockerfile .",
     "build:wasm": "node build/wasm.js --docker",
     "lint": "standard | snazzy",
@@ -74,6 +75,7 @@
     "cronometro": "^0.8.0",
     "delay": "^5.0.0",
     "docsify-cli": "^4.4.3",
+    "esbuild": "^0.14.14",
     "formdata-node": "^4.3.1",
     "https-pem": "^2.0.0",
     "husky": "^7.0.2",