# 產生素材上傳簽名

標準 URL： https://sosoapi.ai/zh-tw/docs/api/assets-api-upload-sign

契約：sha256:563d2d581da0ad29

取得工作空間媒體物件的簽署上傳 URL。將檔案位元組上傳至該 URL，再呼叫 upload/complete 登記素材。此端點不會替您讀取本機檔案。

POST /assets-api/upload/sign

## 驗證與權限

- **接受的憑證類別：** user_session、delegated_oauth、personal_access_token

- **委派能力：** agent:operate

- **最低工作空間角色：** editor

- **存取範圍：** 此使用者獲准存取的資源

- **需要所有工作空間同意：** 否

- **更改狀態：** 是

- **操作完成時：** synchronous_http_response

權杖只能使用其擁有者持有的權利。每次請求會檢查工作空間成員資格、資源擁有權、所選工作空間及已授予能力。core 與 full 設定檔只變更顯示的工具，不會授予存取權。

## 請求欄位

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "workspace_id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
    },
    "asset_type": {
      "type": "string",
      "enum": [
        "image",
        "video"
      ]
    },
    "filename": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "content_type": {
      "type": "string",
      "minLength": 1,
      "maxLength": 120
    },
    "byte_size": {
      "type": "integer",
      "minimum": 1,
      "maximum": 524288000,
      "description": "Exact length in bytes of the body you will PUT (max 500 MiB). It is signed into the upload URL as Content-Length, counted against the workspace storage limit, and checked again when you complete the upload: an object longer than declared is rejected and removed."
    },
    "content_sha256": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$"
    },
    "title": {
      "type": "string",
      "maxLength": 200
    }
  },
  "required": [
    "workspace_id",
    "asset_type",
    "filename",
    "content_type",
    "byte_size",
    "content_sha256"
  ],
  "additionalProperties": false
}
```

## 回應與完成

成功 HTTP 狀態：200

成功 HTTP 回應可能表示請求已接受，並非已完成。背景工作請儲存回傳 ID，持續檢查同一操作直到完成。已排程或已接受的貼文，只有平台確認後才算已發布；用戶端逾時無法證明結果。

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "object_key": {
      "type": "string",
      "minLength": 1
    },
    "public_url": {
      "type": "string",
      "format": "uri"
    },
    "signed_url": {
      "type": "string",
      "format": "uri"
    },
    "upload_headers": {
      "type": "object",
      "properties": {
        "Content-Type": {
          "type": "string",
          "minLength": 1
        },
        "x-amz-checksum-sha256": {
          "type": "string",
          "minLength": 1
        }
      },
      "required": [
        "Content-Type",
        "x-amz-checksum-sha256"
      ]
    },
    "expires_seconds": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991
    }
  },
  "required": [
    "object_key",
    "public_url",
    "signed_url",
    "upload_headers",
    "expires_seconds"
  ]
}
```

## 錯誤與安全重試

檢查 HTTP 狀態和回應內容。400 驗證錯誤可能包含 ZodError；處理常式錯誤使用 error、message 和 code 欄位。保留 request_id 或 x-request-id 以便診斷，但不要保留憑證。先解決 401/403 存取錯誤再重試，並在收到 429 時遵循 Retry-After。如寫入結果不確定或回傳 5xx，先讀取現有結果。僅在支援時重複使用冪等鍵；重試行為因操作而異，並不保證恰好傳送一次。

## 範例

這些範例使用已依結構描述檢查的虛構值。請將 ID 替換為您有權使用的 ID、將媒體替換為已就緒素材，並將日期替換為已確認的發布時間。提交寫入前，請檢查帳號資格。本頁不會傳送 API 請求。

在伺服器上將 SOSOAPI_ACCESS_TOKEN 設為此操作接受的憑證，且不要放入瀏覽器程式碼。代理程式請使用 sosoapi auth login 透過瀏覽器登入，並由 CLI 更新憑證。

request.json

```json
{
  "workspace_id": "11111111-1111-4111-8111-111111111111",
  "asset_type": "image",
  "filename": "example.png",
  "content_type": "image/png",
  "byte_size": 1,
  "content_sha256": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
}
```

cURL

```bash
curl --request POST \
  "https://gqeshlawtcexsapabaui.supabase.co/functions/v1/assets-api/upload/sign" \
  -H "Authorization: Bearer $SOSOAPI_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  --data-binary @request.json
```

JavaScript

```js
// Server-side JavaScript. Do not print tokens or credential-bearing responses.
const token = process.env.SOSOAPI_ACCESS_TOKEN;
if (!token) throw new Error("Set an accepted credential for this operation");
const response = await fetch("https://gqeshlawtcexsapabaui.supabase.co/functions/v1/assets-api/upload/sign", {
  method: "POST",
  headers: { "Content-Type": "application/json", Authorization: "Bearer " + token },
  body: JSON.stringify({
  "workspace_id": "11111111-1111-4111-8111-111111111111",
  "asset_type": "image",
  "filename": "example.png",
  "content_type": "image/png",
  "byte_size": 1,
  "content_sha256": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
})
});
const result = await response.json();
// Check response.ok, the operation-specific body and completion state before continuing.
```

CLI

```bash
npx sosoapi api post /assets-api/upload/sign < request.json
```

合成回應範例

```json
{
  "object_key": "example",
  "public_url": "https://example.com/media.png",
  "signed_url": "https://example.com/media.png",
  "upload_headers": {
    "Content-Type": "example",
    "x-amz-checksum-sha256": "example"
  },
  "expires_seconds": 1
}
```

## 相關工具與指南

MCP：sosoapi_upload_asset

[API 參考](https://sosoapi.ai/zh-tw/docs/api)