fix(core): resolve vite server.https for websocket server (#381)

Author: webfansplz

packages/core/src/node/https.ts

@@ -0,0 +1,33 @@
+// Port from https://github.com/vitejs/vite/blob/main/packages/vite/src/node/http.ts#L146
+
+import type { Buffer } from 'node:buffer'
+import type { ServerOptions as HttpsServerOptions } from 'node:https'
+import { readFile } from 'node:fs/promises'
+import { resolve } from 'node:path'
+
+export async function resolveHttpsConfig(https: HttpsServerOptions | undefined): Promise<HttpsServerOptions | undefined> {
+  if (!https)
+    return undefined
+
+  const [ca, cert, key, pfx] = await Promise.all([
+    readFileIfExists(https.ca),
+    readFileIfExists(https.cert),
+    readFileIfExists(https.key),
+    readFileIfExists(https.pfx),
+  ])
+
+  return {
+    ...https,
+    ca,
+    cert,
+    key,
+    pfx,
+  }
+}
+
+async function readFileIfExists<T>(value: T): Promise<T | Buffer> {
+  if (typeof value === 'string')
+    return readFile(resolve(value)).catch(() => value)
+
+  return value
+}

packages/core/src/node/ws.ts

@@ -12,6 +12,7 @@ import { getPort } from 'get-port-please'
 import { createDebug } from 'obug'
 import { MARK_INFO } from './constants'
 import { diagnostics } from './diagnostics'
+import { resolveHttpsConfig } from './https'
 
 const debugInvoked = createDebug('vite:devtools:rpc:invoked')
 
@@ -40,7 +41,7 @@ function buildWsUrl({ host, port, https }: { host: string, port: number, https:
 export async function createWsServer(options: CreateWsServerOptions) {
   const rpcHost = options.context.rpc as unknown as RpcFunctionsHost
   const host = options.websocket.host
-  const https = options.websocket.https === false ? undefined : (options.websocket.https ?? options.context.viteConfig.server.https)
+  const https = await resolveHttpsConfig(options.websocket.https === false ? undefined : (options.websocket.https ?? options.context.viteConfig.server.https))
   const port = options.websocket.port ?? await getPort({ port: 7812, host, random: true })!
 
   const wsClients = new Set<WebSocket>()