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---
title: 公共资源
description: 通过 public/ 文件夹将静态文件(图像、图标、字体)与应用一起发布。
icon: folder-open
---
应用根目录中的 `public/` 文件夹包含静态文件——图像、图标、字体,或应用在运行时所需的任何其他资源。 这些文件会在构建时自动包含、在开发模式下同步,并上传到服务器。
放置在 `public/` 中的文件:
* **公开可访问**——同步到服务器后,资源将通过公共 URL 提供服务。 访问它们无需身份验证。
* **在前端组件中可用**——使用资源 URL 在 React 组件中显示图像、图标或任何媒体。
* **在逻辑函数中可用**——在电子邮件、API 响应或任何服务端逻辑中引用资源 URL。
* **用于市场元数据**——`defineApplication()` 中的 `logo` 和 `galleryImages` 字段引用此文件夹中的文件(例如,`public/logo.png`)。 应用发布后,这些内容会显示在市场中。 对于这些字段,外部绝对 URL 会被忽略——请改为将图像打包到 `public/` 中。 每个图片文件大小不得超过 10 MB。
* **在开发模式下自动同步**——当在 `public/` 中添加、更新或删除文件时,会自动同步到服务器。 无需重启。
* **包含在构建中**——`yarn twenty dev:build` 会将所有公共资源打包到分发产物中。
## 使用 `getPublicAssetUrl` 访问公共资源
使用来自 `twenty-sdk` 的 `getPublicAssetUrl` 辅助函数获取 `public/` 目录中文件的完整 URL。 它可在 **逻辑函数** 和 **前端组件** 中使用。
**在逻辑函数中:**
```ts src/logic-functions/send-invoice.ts
import { defineLogicFunction } from 'twenty-sdk/define';
import { getPublicAssetUrl } from 'twenty-sdk/utils';
const handler = async (): Promise<any> => {
const logoUrl = getPublicAssetUrl('logo.png');
const invoiceUrl = getPublicAssetUrl('templates/invoice.png');
// Fetch the file content (no auth required — public endpoint)
const response = await fetch(invoiceUrl);
const buffer = await response.arrayBuffer();
return { logoUrl, size: buffer.byteLength };
};
export default defineLogicFunction({
universalIdentifier: 'a1b2c3d4-...',
name: 'send-invoice',
description: 'Sends an invoice with the app logo',
timeoutSeconds: 10,
handler,
});
```
**在前端组件中:**
```tsx src/front-components/company-card.tsx
import { defineFrontComponent } from 'twenty-sdk/define';
import { getPublicAssetUrl } from 'twenty-sdk/utils';
const CompanyCard = () => {
const logoUrl = getPublicAssetUrl('logo.png');
return <img src={logoUrl} alt="App logo" />;
};
export default defineFrontComponent({
universalIdentifier: '...',
name: 'company-card',
component: CompanyCard,
});
```
`path` 参数是相对于应用的 `public/` 文件夹的。 `getPublicAssetUrl('logo.png')` 和 `getPublicAssetUrl('public/logo.png')` 均解析为相同的 URL——如果存在,`public/` 前缀会被自动移除。