From 0ba1d41881cd738ae860a9705b5a5c54e8bc36fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bal=C3=A1zs=20Orb=C3=A1n?= <info@balazsorban.com>
Date: Tue, 7 Nov 2023 05:01:16 +0100
Subject: [PATCH] docs: add proxy example (#9077)

* chore: add Preview Deployment example

* simplify package.json

* chore(examples): bump to `next-auth@beta`
---
 apps/proxy/.env.example           |  8 ++++++++
 apps/proxy/.gitignore             | 15 +++++++++++++++
 apps/proxy/README.md              |  1 +
 apps/proxy/api/[auth].ts          | 27 +++++++++++++++++++++++++++
 apps/proxy/api/callback/[auth].ts |  2 ++
 apps/proxy/package.json           |  9 +++++++++
 apps/proxy/tsconfig.json          | 21 +++++++++++++++++++++
 7 files changed, 83 insertions(+)
 create mode 100644 apps/proxy/.env.example
 create mode 100644 apps/proxy/.gitignore
 create mode 100644 apps/proxy/README.md
 create mode 100644 apps/proxy/api/[auth].ts
 create mode 100644 apps/proxy/api/callback/[auth].ts
 create mode 100644 apps/proxy/package.json
 create mode 100644 apps/proxy/tsconfig.json

diff --git a/apps/proxy/.env.example b/apps/proxy/.env.example
new file mode 100644
index 0000000000..af469ab360
--- /dev/null
+++ b/apps/proxy/.env.example
@@ -0,0 +1,8 @@
+VERCEL="1"
+# https://vercel.com/changelog/corepack-experimental-is-now-available
+ENABLE_EXPERIMENTAL_COREPACK="1"
+
+# https://authjs.dev/getting-started/deployment#securing-a-preview-deployment
+AUTH_SECRET= # openssl rand -base64 64
+AUTH_GITHUB_ID=
+AUTH_GITHUB_SECRET=
\ No newline at end of file
diff --git a/apps/proxy/.gitignore b/apps/proxy/.gitignore
new file mode 100644
index 0000000000..a8c7d2e355
--- /dev/null
+++ b/apps/proxy/.gitignore
@@ -0,0 +1,15 @@
+# dependencies
+/node_modules
+
+# misc
+.DS_Store
+*.pem
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
diff --git a/apps/proxy/README.md b/apps/proxy/README.md
new file mode 100644
index 0000000000..1333ed77b7
--- /dev/null
+++ b/apps/proxy/README.md
@@ -0,0 +1 @@
+TODO
diff --git a/apps/proxy/api/[auth].ts b/apps/proxy/api/[auth].ts
new file mode 100644
index 0000000000..bdfa8e0abc
--- /dev/null
+++ b/apps/proxy/api/[auth].ts
@@ -0,0 +1,27 @@
+import { Auth, AuthConfig } from "@auth/core"
+import GitHub from "@auth/core/providers/github"
+
+export default function handler(req: Request) {
+  return Auth(req, getDefaults({ providers: [GitHub] }))
+}
+
+export const config = { runtime: "edge" }
+
+export function getDefaults(config: AuthConfig) {
+  config.secret ??= process.env.AUTH_SECRET
+  config.trustHost ??= !!process.env.VERCEL
+  config.redirectProxyUrl ??= process.env.AUTH_REDIRECT_PROXY_URL
+  config.providers = config.providers.map((p) => {
+    const finalProvider = typeof p === "function" ? p() : p
+    if (finalProvider.type === "oauth" || finalProvider.type === "oidc") {
+      const ID = finalProvider.id.toUpperCase()
+      finalProvider.clientId ??= process.env[`AUTH_${ID}_ID`]
+      finalProvider.clientSecret ??= process.env[`AUTH_${ID}_SECRET`]
+      if (finalProvider.type === "oidc") {
+        finalProvider.issuer ??= process.env[`AUTH_${ID}_ISSUER`]
+      }
+    }
+    return finalProvider
+  })
+  return config
+}
diff --git a/apps/proxy/api/callback/[auth].ts b/apps/proxy/api/callback/[auth].ts
new file mode 100644
index 0000000000..182b360e66
--- /dev/null
+++ b/apps/proxy/api/callback/[auth].ts
@@ -0,0 +1,2 @@
+export { default } from "../[auth].js"
+export const config = { runtime: "edge" }
diff --git a/apps/proxy/package.json b/apps/proxy/package.json
new file mode 100644
index 0000000000..03c18004f8
--- /dev/null
+++ b/apps/proxy/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "proxy",
+  "description": "Proxy for Auth.js hosted examples",
+  "private": true,
+  "type": "module",
+  "dependencies": {
+    "@auth/core": "latest"
+  }
+}
diff --git a/apps/proxy/tsconfig.json b/apps/proxy/tsconfig.json
new file mode 100644
index 0000000000..8ff03a7adb
--- /dev/null
+++ b/apps/proxy/tsconfig.json
@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "skipLibCheck": true
+  },
+  "include": [
+    "**/*.ts",
+  ],
+  "exclude": [
+    "node_modules",
+  ]
+}
\ No newline at end of file