create cors policy schema and middleware

package.json

@@ -4,7 +4,7 @@
  "description": "",
  "main": "index.ts",
  "scripts": {
- "dev": "turbo dev",
+ "dev": "turbo build && turbo dev",
  "build": "turbo build",
  "test": "turbo test",
  "test:watch": "turbo run test:watch",

packages/policies/.eslintignore

@@ -0,0 +1,2 @@
+jest.config.js
+dist/ 

packages/policies/.eslintrc.json

@@ -0,0 +1,4 @@
+{
+ "extends": ["@endpointly/eslint-config/base.json"],
+ "root": true
+}

packages/policies/jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+ preset: "ts-jest",
+ testEnvironment: "node",
+};

packages/policies/package.json

@@ -0,0 +1,25 @@
+{
+ "name": "@endpointly/policies",
+ "version": "0.0.0",
+ "description": "",
+ "main": "dist/src/index.js",
+ "types": "dist/src/index.d.ts",
+ "scripts": {
+ "build": "tsc -d",
+ "test": "jest",
+ "test:watch": "jest --watch",
+ "lint": "eslint .",
+ "clean": "rimraf ./dist"
+ },
+ "author": "",
+ "license": "ISC",
+ "dependencies": {
+ "ajv": "^8.12.0",
+ "cors": "^2.8.5"
+ },
+ "devDependencies": {
+ "@endpointly/eslint-config": "*",
+ "@endpointly/tsconfig": "*",
+ "@types/cors": "^2.8.17"
+ }
+}

packages/policies/src/cors/index.ts

@@ -0,0 +1,2 @@
+export * from "./schema";
+export * from "./middleware";

packages/policies/src/cors/middleware.ts

@@ -0,0 +1,3 @@
+import cors from "cors";
+
+export { cors as corsMiddleware };

packages/policies/src/cors/schema.ts

@@ -0,0 +1,46 @@
+import { JSONSchemaType } from "ajv";
+
+export interface CorsPolicy {
+ origin?: boolean | string | string[];
+ methods?: string | string[];
+ allowedHeaders?: string | string[];
+ exposedHeaders?: string | string[];
+ credentials?: boolean;
+ maxAge?: number;
+ optionsSuccessStatus?: number;
+}
+
+export const corsSchema: JSONSchemaType<CorsPolicy> = {
+ type: "object",
+ properties: {
+ origin: {
+ type: ["boolean", "string", "array"],
+ oneOf: [
+ { type: "boolean" },
+ { type: "string" },
+ { type: "array", items: { type: "string" } },
+ ],
+ default: "*",
+ nullable: true,
+ },
+ methods: {
+ type: ["string", "array"],
+ oneOf: [{ type: "string" }, { type: "array", items: { type: "string" } }],
+ default: ["GET", "HEAD", "PUT", "PATCH", "POST", "DELETE"],
+ nullable: true,
+ },
+ allowedHeaders: {
+ type: ["string", "array"],
+ oneOf: [{ type: "string" }, { type: "array", items: { type: "string" } }],
+ nullable: true,
+ },
+ exposedHeaders: {
+ type: ["string", "array"],
+ oneOf: [{ type: "string" }, { type: "array", items: { type: "string" } }],
+ nullable: true,
+ },
+ credentials: { type: "boolean", nullable: true },
+ maxAge: { type: "number", nullable: true },
+ optionsSuccessStatus: { type: "number", default: 204, nullable: true },
+ },
+};

packages/policies/src/index.ts

@@ -0,0 +1,2 @@
+export * from "./schema";
+export * from "./cors";

packages/policies/src/schema.ts

@@ -0,0 +1,16 @@
+import { JSONSchemaType } from "ajv";
+import { CorsPolicy, corsSchema } from "./cors";
+
+export interface Policies {
+ cors?: CorsPolicy;
+}
+
+export const policiesSchema: JSONSchemaType<Policies> = {
+ type: "object",
+ properties: {
+ cors: {
+ ...corsSchema,
+ nullable: true,
+ },
+ },
+};

packages/policies/tsconfig.json

@@ -0,0 +1,7 @@
+{
+ "extends": "@endpointly/tsconfig/base.json",
+ "compilerOptions": {
+ "outDir": "./dist",
+ "rootDir": "."
+ }
+}

packages/server/package.json

@@ -2,7 +2,7 @@
  "name": "@endpointly/server",
  "version": "0.0.0",
  "description": "",
- "main": "index.js",
+ "main": "dist/src/index.js",
  "scripts": {
  "dev": "nodemon ./src/index.ts",
  "build": "tsc",
@@ -22,6 +22,7 @@
  "devDependencies": {
  "@endpointly/tsconfig": "*",
  "@endpointly/eslint-config": "*",
+ "@endpointly/policies": "*",
  "@types/express": "^4.17.21",
  "http-proxy-middleware": "^2.0.6",
  "nodemon": "^3.0.3"

packages/server/src/router.ts

@@ -1,4 +1,5 @@
 import express from "express";
+import { corsMiddleware } from "@endpointly/policies";
 import { parseConfig } from "./utils/config/parse-config";
 import { createProxies } from "./utils/proxy/create-proxies";
 
@@ -12,6 +13,8 @@ if (process.env.NODE_ENV === "development") {
  });
 }
 
+router.use(corsMiddleware());
+
 createProxies(router, config.endpoints);
 
 export { router };

packages/server/src/types/config.ts

@@ -1,5 +1,7 @@
+import { Policies } from "@endpointly/policies";
 import { Endpoint } from "./endpoints";
 
 export interface Config {
  endpoints: Endpoint[];
+ policies?: Policies;
 }

packages/server/src/utils/config/config-schema.ts

@@ -1,4 +1,5 @@
 import { JSONSchemaType } from "ajv";
+import { policiesSchema } from "@endpointly/policies";
 import { Config } from "../../types/config";
 import { KeyValue, Destination, Endpoint } from "../../types/endpoints";
 
@@ -39,6 +40,10 @@ export const configSchema: JSONSchemaType<Config> = {
  type: "array",
  items: endpointSchema,
  },
+ policies: {
+ ...policiesSchema,
+ nullable: true,
+ },
  },
  required: ["endpoints"],
 };