feat: add api for getting server info

api/src/controllers/index.ts

@@ -6,3 +6,4 @@ export * from './group'
 export * from './session'
 export * from './stp'
 export * from './user'
+export * from './info'

api/src/controllers/info.ts

@@ -0,0 +1,37 @@
+import express from 'express'
+import { Request, Security, Route, Tags, Example, Get } from 'tsoa'
+
+export interface InfoResponse {
+  mode: string
+  cors: string
+  whiteList: string[]
+  protocol: string
+}
+
+@Route('SASjsApi/info')
+@Tags('Info')
+export class InfoController {
+  /**
+   * @summary Get server info (mode, cors, whiteList, protocol).
+   *
+   */
+  @Example<InfoResponse>({
+    mode: 'desktop',
+    cors: 'enable',
+    whiteList: ['http://example.com', 'http://example2.com'],
+    protocol: 'http'
+  })
+  @Get('/')
+  public info(): InfoResponse {
+    const response = {
+      mode: process.env.MODE ?? 'desktop',
+      cors:
+        process.env.CORS ?? process.env.MODE === 'server'
+          ? 'disable'
+          : 'enable',
+      whiteList: process.env.WHITELIST?.split(' ') ?? [],
+      protocol: process.env.PROTOCOL ?? 'http'
+    }
+    return response
+  }
+}