mirror of
https://github.com/deepseek-ai/deepseek-harness
synced 2026-08-15 21:04:50 +00:00
116 lines
5.5 KiB
Markdown
116 lines
5.5 KiB
Markdown
# 持久图片附件
|
|
|
|
[English](attachment.md) | 中文
|
|
|
|
附件 seam 将二进制图片的所有权与会话日志分离。生产方把经过校验的编码字节交给 [`ctx.attachments`](#ctxattachments--attachmentstore-abstract-seam)；只有对象完成持久化后，该服务才会发布不可变的内容寻址引用。会话事件和模型可见的 `ImageBlock` 包含该引用及其元数据，绝不包含浏览器对象 URL、宿主临时路径、提供方 URL 或 base64 数据。
|
|
|
|
未发送的浏览器草稿可以保留在内存中，原生客户端也可以将其暂存于操作系统临时存储。宿主接受用户消息后，会先把消息中的图片移到 `<DSH_HOME>/attachments/v1` 下，再追加用户事件。结构化模型图片输出遵循同样的先持久化、后追加事件规则。
|
|
|
|
来源：[`packages/attachment/attachment/src/types.ts`](../../packages/attachment/attachment/src/types.ts)
|
|
|
|
## 标识与经过校验的元数据
|
|
|
|
`AttachmentId` 是带类型标记的不透明字符串。本地后端目前生成 `sha256:<digest>`，但消费方既不能解析这种表示，也不能据此派生文件系统路径。
|
|
|
|
```ts type-equiv
|
|
/** Raster image formats accepted by the version-one attachment path. */
|
|
type ImageMediaType = 'image/png' | 'image/jpeg' | 'image/webp' | 'image/gif'
|
|
```
|
|
|
|
```ts type-equiv
|
|
/** Durable, serializable metadata for one immutable image object. */
|
|
interface ImageAttachmentRef {
|
|
/** Opaque storage identifier; never a filesystem path or bearer URL. */
|
|
attachmentId: AttachmentId
|
|
/** Media type verified from the stored bytes. */
|
|
mediaType: ImageMediaType
|
|
/** Exact encoded byte length. */
|
|
bytes: number
|
|
/** Intrinsic encoded width in pixels. */
|
|
width: number
|
|
/** Intrinsic encoded height in pixels. */
|
|
height: number
|
|
/** Optional display name stripped of local path information. */
|
|
name?: string
|
|
}
|
|
```
|
|
|
|
```ts type-equiv
|
|
/** Deployment-resolved limits used by upload admission and request buffering. */
|
|
interface ImageAttachmentLimits {
|
|
maxImageBytes: number
|
|
maxImagesPerMessage: number
|
|
maxMessageImageBytes: number
|
|
maxImagePixels: number
|
|
mediaTypes: readonly ImageMediaType[]
|
|
}
|
|
```
|
|
|
|
引用记录固有尺寸和编码长度，使客户端无需先解码即可排布历史记录；每次权威读取仍会根据对象重新校验摘要、媒体签名、尺寸和元数据。
|
|
|
|
## 提交与经校验读取的数据
|
|
|
|
```ts type-equiv
|
|
/** Request to validate and durably commit one image. */
|
|
interface SaveImageAttachment {
|
|
data: Uint8Array
|
|
/** Caller-declared media type, checked against fully decoded bytes. */
|
|
mediaType: ImageMediaType
|
|
/** Optional browser/provider display name; it is never interpreted as a path. */
|
|
name?: string
|
|
}
|
|
```
|
|
|
|
```ts type-equiv
|
|
/** Stored image bytes returned after reference and digest verification. */
|
|
interface StoredImageAttachment {
|
|
ref: ImageAttachmentRef
|
|
data: Uint8Array
|
|
}
|
|
```
|
|
|
|
`saveImage()` 校验字节并以原子方式提交一个对象，之后才返回其引用。`validateImage()` 执行相同的准入检查，但不持久化任何内容；批量调用方会在保存任何成员前通过它校验所有成员，因此校验拒绝不会留下部分对象。`readImage()` 接受来自已授权会话路径的引用，只在完整性校验通过后返回字节。该服务刻意不规定保留策略：恢复和 fork 后的会话可能共享对象，因此基于引用的垃圾回收会延期实现，而不是与任何一个会话的删除绑定。
|
|
|
|
<!-- BEGIN GENERATED cordis-surface (gen-cordis-catalog.ts) — do not edit between markers -->
|
|
|
|
<a id="cordis-surface"></a>
|
|
|
|
## Cordis API
|
|
|
|
Generated from source by `scripts/gen-cordis-catalog.ts` (verified fresh by `pnpm run verify-cordis-catalog` in doc-sync; regenerate with `pnpm run gen-cordis-catalog`) — this section is byte-identical in both language sides of the page. Signature blocks use a `ts cordis-catalog` fence and keep the original source JSDoc; dispatch modes are defined in the [primer](../cordis-primer.md#dispatch-modes), and the framework-inherited `ctx` API lives in [cordis-api/inherited.md](../cordis-api/inherited.md).
|
|
|
|
<a id="ctxattachments--attachmentstore-abstract-seam"></a>
|
|
|
|
### `ctx.attachments` — `AttachmentStore` (abstract seam)
|
|
|
|
Immutable binary attachment service. Implementations validate bytes before publishing a reference.
|
|
|
|
```ts cordis-catalog
|
|
/**
|
|
* Validate one image without persisting it.
|
|
* Batch callers validate every member before saving any member.
|
|
* @param input - encoded bytes, declared media type, and optional display name.
|
|
* @returns completion after the encoded raster has been fully decoded.
|
|
*/
|
|
abstract validateImage(input: SaveImageAttachment): Promise<void>
|
|
|
|
/**
|
|
* Validate and durably commit one image before its owning session event is appended.
|
|
* @param input - encoded bytes, declared media type, and optional display name.
|
|
* @returns a durable content-addressed reference.
|
|
*/
|
|
abstract saveImage(input: SaveImageAttachment): Promise<ImageAttachmentRef>
|
|
|
|
/**
|
|
* Read one image and verify that bytes still match the recorded reference.
|
|
* @param ref - durable reference from the session log.
|
|
* @param signal - optional cancellation for backend read and verification work.
|
|
* @returns the verified bytes and canonical reference.
|
|
* @throws the signal reason when aborted, or a storage error when verification fails.
|
|
*/
|
|
abstract readImage(ref: ImageAttachmentRef, signal?: AbortSignal): Promise<StoredImageAttachment>
|
|
```
|
|
|
|
Source: [`packages/attachment/attachment/src/index.ts:29`](../../packages/attachment/attachment/src/index.ts)
|
|
<!-- END GENERATED cordis-surface -->
|