feat(sandbox): support local file server

plugins/sandbox/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@koishijs/plugin-sandbox",
   "description": "Test Your Virtual Bot in Console",
-  "version": "3.4.0",
+  "version": "3.4.1",
   "main": "lib/index.js",
   "typings": "lib/index.d.ts",
   "files": [

plugins/sandbox/src/index.ts

@@ -1,8 +1,11 @@
 import { $, Context, Dict, Random, Schema, Universal, User } from 'koishi'
 import { Client, DataService } from '@koishijs/console'
-import { resolve } from 'path'
+import {} from '@koishijs/plugin-server'
+import { extname, resolve } from 'path'
 import { SandboxBot } from './bot'
 import zhCN from './locales/zh-CN.yml'
+import { createReadStream } from 'fs'
+import { fileURLToPath } from 'url'
 
 declare module 'koishi' {
   interface Events {
@@ -37,11 +40,19 @@ export interface Message {
 
 export const filter = false
 export const name = 'sandbox'
-export const inject = ['console']
+export const inject = ['console', 'server']
 
-export interface Config {}
+export interface Config {
+  fileServer: {
+    enabled: boolean
+  }
+}
 
-export const Config: Schema<Config> = Schema.object({})
+export const Config: Schema<Config> = Schema.object({
+  fileServer: Schema.object({
+    enabled: Schema.boolean().default(false).description('是否提供本地静态文件服务 (请勿在暴露在公网的设备上开启此选项)。')
+  }),
+})
 
 class SandboxService extends DataService<Dict<number>> {
   static inject = ['database']
@@ -175,6 +186,14 @@ export function apply(ctx: Context, config: Config) {
     }
   })
 
+  if (config.fileServer.enabled) {
+    ctx.server.get('/sandbox/:url(file:.+)', async (koa) => {
+      const { url } = koa.params
+      koa.type = extname(url)
+      koa.body = createReadStream(fileURLToPath(url))
+    })
+  }
+
   ctx.i18n.define('zh-CN', zhCN)
 
   ctx.intersect(session => session.platform.startsWith('sandbox:'))

plugins/sandbox/src/message.ts

@@ -1,5 +1,4 @@
 import { Context, Dict, h, MessageEncoder, Random } from 'koishi'
-import {} from '@koishijs/assets'
 import { SandboxBot } from './bot'
 
 export class SandboxMessenger<C extends Context = Context> extends MessageEncoder<C, SandboxBot<C>> {
@@ -9,8 +8,8 @@ export class SandboxMessenger<C extends Context = Context> extends MessageEncode
     return [type, async (attrs) => {
       const src = attrs.src || attrs.url
       const type1 = type === 'image' ? 'img' : type
-      if (src.startsWith('file:') && this.bot.ctx.assets) {
-        return h(type1, { ...attrs, src: await this.bot.ctx.assets.upload(src, src) })
+      if (src.startsWith('file:')) {
+        return h(type1, { ...attrs, src: `${this.bot.ctx.server.selfUrl}/sandbox/${src}` })
       }
       return h(type1, { ...attrs, src })
     }]