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import { CodeGroup } from '../code.tsx'
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import { Row, Col, Properties, Property, Heading, SubProperty, Paragraph } from '../md.tsx'
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# Workflow 应用 API
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Workflow 应用无会话支持,适合用于翻译/文章写作/总结 AI 等等。
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<div>
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### Base URL
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<CodeGroup title="Code" targetCode={props.appDetail.api_base_url}>
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```javascript
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```
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</CodeGroup>
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### Authentication
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Dify Service API 使用 `API-Key` 进行鉴权。
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<i>**强烈建议开发者把 `API-Key` 放在后端存储,而非分享或者放在客户端存储,以免 `API-Key` 泄露,导致财产损失。**</i>
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所有 API 请求都应在 **`Authorization`** HTTP Header 中包含您的 `API-Key`,如下所示:
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<CodeGroup title="Code">
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```javascript
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Authorization: Bearer {API_KEY}
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```
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</CodeGroup>
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</div>
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---
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<Heading
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url='/workflows/run'
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method='POST'
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title='执行 workflow'
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name='#Execute-Workflow'
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/>
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<Row>
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<Col>
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执行 workflow,没有已发布的 workflow,不可执行。
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### Request Body
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- `inputs` (object) Required
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允许传入 App 定义的各变量值。
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inputs 参数包含了多组键值对(Key/Value pairs),每组的键对应一个特定变量,每组的值则是该变量的具体值。
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- `response_mode` (string) Required
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返回响应模式,支持:
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- `streaming` 流式模式(推荐)。基于 SSE(**[Server-Sent Events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events)**)实现类似打字机输出方式的流式返回。
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- `blocking` 阻塞模式,等待执行完毕后返回结果。(请求若流程较长可能会被中断)。
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<i>由于 Cloudflare 限制,请求会在 100 秒超时无返回后中断。</i>
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- `user` (string) Required
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用户标识,用于定义终端用户的身份,方便检索、统计。
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由开发者定义规则,需保证用户标识在应用内唯一。
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- `files` (array[object]) Optional
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文件列表,适用于传入文件(图片)结合文本理解并回答问题,仅当模型支持 Vision 能力时可用。
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- `type` (string) 支持类型:图片 `image`(目前仅支持图片格式)。
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- `transfer_method` (string) 传递方式,`remote_url` 图片地址 / `local_file` 上传文件
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- `url` (string) 图片地址(仅当传递方式为 `remote_url` 时)
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- `upload_file_id` (string) (string) 上传文件 ID(仅当传递方式为 `local_file` 时)
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### Response
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当 `response_mode` 为 `blocking` 时,返回 CompletionResponse object。
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当 `response_mode` 为 `streaming`时,返回 ChunkCompletionResponse object 流式序列。
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### CompletionResponse
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返回完整的 App 结果,`Content-Type` 为 `application/json` 。
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- `workflow_run_id` (string) workflow 执行 ID
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- `task_id` (string) 任务 ID,用于请求跟踪和下方的停止响应接口
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- `data` (object) 详细内容
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- `id` (string) workflow 执行 ID
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- `workflow_id` (string) 关联 Workflow ID
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- `status` (string) 执行状态, `running` / `succeeded` / `failed` / `stopped`
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- `outputs` (json) Optional 输出内容
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- `error` (string) Optional 错误原因
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- `elapsed_time` (float) Optional 耗时(s)
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- `total_tokens` (int) Optional 总使用 tokens
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- `total_steps` (int) 总步数(冗余),默认 0
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- `created_at` (timestamp) 开始时间
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- `finished_at` (timestamp) 结束时间
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### ChunkCompletionResponse
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返回 App 输出的流式块,`Content-Type` 为 `text/event-stream`。
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每个流式块均为 data: 开头,块之间以 `\n\n` 即两个换行符分隔,如下所示:
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<CodeGroup>
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```streaming {{ title: 'Response' }}
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data: {"event": "message", "task_id": "900bbd43-dc0b-4383-a372-aa6e6c414227", "id": "663c5084-a254-4040-8ad3-51f2a3c1a77c", "answer": "Hi", "created_at": 1705398420}\n\n
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```
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</CodeGroup>
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流式块中根据 `event` 不同,结构也不同,包含以下类型:
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- `event: workflow_started` workflow 开始执行
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- `task_id` (string) 任务 ID,用于请求跟踪和下方的停止响应接口
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- `workflow_run_id` (string) workflow 执行 ID
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- `event` (string) 固定为 `workflow_started`
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- `data` (object) 详细内容
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- `id` (string) workflow 执行 ID
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- `workflow_id` (string) 关联 Workflow ID
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- `sequence_number` (int) 自增序号,App 内自增,从 1 开始
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- `created_at` (timestamp) 开始时间
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- `event: node_started` node 开始执行
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- `task_id` (string) 任务 ID,用于请求跟踪和下方的停止响应接口
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- `workflow_run_id` (string) workflow 执行 ID
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- `event` (string) 固定为 `node_started`
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- `data` (object) 详细内容
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- `id` (string) workflow 执行 ID
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- `node_id` (string) 节点 ID
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- `node_type` (string) 节点类型
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- `title` (string) 节点名称
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- `index` (int) 执行序号,用于展示 Tracing Node 顺序
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- `predecessor_node_id` (string) 前置节点 ID,用于画布展示执行路径
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- `inputs` (array[object]) 节点中所有使用到的前置节点变量内容
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- `created_at` (timestamp) 开始时间
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- `event: node_finished` node 执行结束,成功失败同一事件中不同状态
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- `task_id` (string) 任务 ID,用于请求跟踪和下方的停止响应接口
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- `workflow_run_id` (string) workflow 执行 ID
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- `event` (string) 固定为 `node_finished`
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- `data` (object) 详细内容
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- `id` (string) node 执行 ID
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- `node_id` (string) 节点 ID
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- `index` (int) 执行序号,用于展示 Tracing Node 顺序
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- `predecessor_node_id` (string) optional 前置节点 ID,用于画布展示执行路径
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- `inputs` (array[object]) 节点中所有使用到的前置节点变量内容
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- `process_data` (json) Optional 节点过程数据
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- `outputs` (json) Optional 输出内容
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- `status` (string) 执行状态 `running` / `succeeded` / `failed` / `stopped`
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- `error` (string) Optional 错误原因
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- `elapsed_time` (float) Optional 耗时(s)
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- `execution_metadata` (json) 元数据
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- `total_tokens` (int) optional 总使用 tokens
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- `total_price` (decimal) optional 总费用
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- `currency` (string) optional 货币,如 `USD` / `RMB`
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- `created_at` (timestamp) 开始时间
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- `event: workflow_finished` workflow 执行结束,成功失败同一事件中不同状态
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- `task_id` (string) 任务 ID,用于请求跟踪和下方的停止响应接口
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- `workflow_run_id` (string) workflow 执行 ID
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- `event` (string) 固定为 `workflow_finished`
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- `data` (object) 详细内容
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- `id` (string) workflow 执行 ID
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- `workflow_id` (string) 关联 Workflow ID
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- `status` (string) 执行状态 `running` / `succeeded` / `failed` / `stopped`
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- `outputs` (json) Optional 输出内容
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- `error` (string) Optional 错误原因
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- `elapsed_time` (float) Optional 耗时(s)
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- `total_tokens` (int) Optional 总使用 tokens
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- `total_steps` (int) 总步数(冗余),默认 0
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- `created_at` (timestamp) 开始时间
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- `finished_at` (timestamp) 结束时间
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- `event: ping` 每 10s 一次的 ping 事件,保持连接存活。
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### Errors
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- 400,`invalid_param`,传入参数异常
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- 400,`app_unavailable`,App 配置不可用
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- 400,`provider_not_initialize`,无可用模型凭据配置
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- 400,`provider_quota_exceeded`,模型调用额度不足
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- 400,`model_currently_not_support`,当前模型不可用
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- 400,`workflow_request_error`,workflow 执行失败
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- 500,服务内部异常
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</Col>
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<Col sticky>
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<CodeGroup title="Request" tag="POST" label="/workflows/run" targetCode={`curl -X POST '${props.appDetail.api_base_url}/workflows/run' \\\n--header 'Authorization: Bearer {api_key}' \\\n--header 'Content-Type: application/json' \\\n--data-raw '{\n "inputs": ${JSON.stringify(props.inputs)},\n "response_mode": "streaming",\n "user": "abc-123"\n}'\n`}>
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```bash {{ title: 'cURL' }}
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curl -X POST '${props.appDetail.api_base_url}/workflows/run' \
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--header 'Authorization: Bearer {api_key}' \
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--header 'Content-Type: application/json' \
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--data-raw '{
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"inputs": {},
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"response_mode": "streaming",
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"user": "abc-123"
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}'
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```
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</CodeGroup>
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### Blocking Mode
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<CodeGroup title="Response">
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```json {{ title: 'Response' }}
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{
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"workflow_run_id": "djflajgkldjgd",
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"task_id": "9da23599-e713-473b-982c-4328d4f5c78a",
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"data": {
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"id": "fdlsjfjejkghjda",
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"workflow_id": "fldjaslkfjlsda",
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"status": "succeeded",
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"outputs": {
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"text": "Nice to meet you."
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},
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"error": null,
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"elapsed_time": 0.875,
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"total_tokens": 3562,
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"total_steps": 8,
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"created_at": 1705407629,
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"finished_at": 1727807631
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}
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}
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```
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</CodeGroup>
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### Streaming Mode
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<CodeGroup title="Response">
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```streaming {{ title: 'Response' }}
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data: {"event": "workflow_started", "task_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "workflow_run_id": "5ad498-f0c7-4085-b384-88cbe6290", "data": {"id": "5ad498-f0c7-4085-b384-88cbe6290", "workflow_id": "dfjasklfjdslag", "sequence_number": 1, "created_at": 1679586595}}
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data: {"event": "node_started", "task_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "workflow_run_id": "5ad498-f0c7-4085-b384-88cbe6290", "data": {"id": "5ad498-f0c7-4085-b384-88cbe6290", "node_id": "dfjasklfjdslag", "node_type": "start", "title": "Start", "index": 0, "predecessor_node_id": "fdljewklfklgejlglsd", "inputs": {}, "created_at": 1679586595}}
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data: {"event": "node_finished", "task_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "workflow_run_id": "5ad498-f0c7-4085-b384-88cbe6290", "data": {"id": "5ad498-f0c7-4085-b384-88cbe6290", "node_id": "dfjasklfjdslag", "node_type": "start", "title": "Start", "index": 0, "predecessor_node_id": "fdljewklfklgejlglsd", "inputs": {}, "outputs": {}, "status": "succeeded", "elapsed_time": 0.324, "execution_metadata": {"total_tokens": 63127864, "total_price": 2.378, "currency": "USD"}, "created_at": 1679586595}}
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data: {"event": "workflow_finished", "task_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "workflow_run_id": "5ad498-f0c7-4085-b384-88cbe6290", "data": {"id": "5ad498-f0c7-4085-b384-88cbe6290", "workflow_id": "dfjasklfjdslag", "outputs": {}, "status": "succeeded", "elapsed_time": 0.324, "total_tokens": 63127864, "total_steps": "1", "created_at": 1679586595, "finished_at": 1679976595}}
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```
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</CodeGroup>
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</Col>
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</Row>
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---
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<Heading
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url='/workflows/:task_id/stop'
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method='POST'
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title='停止响应'
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name='#stop-generatebacks'
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/>
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<Row>
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<Col>
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仅支持流式模式。
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### Path
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- `task_id` (string) 任务 ID,可在流式返回 Chunk 中获取
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### Request Body
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- `user` (string) Required
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用户标识,用于定义终端用户的身份,必须和发送消息接口传入 user 保持一致。
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### Response
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- `result` (string) 固定返回 "success"
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</Col>
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<Col sticky>
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### Request Example
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<CodeGroup title="Request" tag="POST" label="/workflows/:task_id/stop" targetCode={`curl -X POST '${props.appDetail.api_base_url}/workflows/:task_id/stop' \\\n-H 'Authorization: Bearer {api_key}' \\\n-H 'Content-Type: application/json' \\\n--data-raw '{"user": "abc-123"}'`}>
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```bash {{ title: 'cURL' }}
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curl -X POST '${props.appDetail.api_base_url}/workflows/:task_id/stop' \
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-H 'Authorization: Bearer {api_key}' \
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-H 'Content-Type: application/json' \
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--data-raw '{
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"user": "abc-123"
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}'
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```
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</CodeGroup>
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### Response Example
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<CodeGroup title="Response">
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```json {{ title: 'Response' }}
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{
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"result": "success"
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}
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```
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</CodeGroup>
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</Col>
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</Row>
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---
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<Heading
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url='/parameters'
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method='GET'
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title='获取应用配置信息'
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name='#parameters'
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/>
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<Row>
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<Col>
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用于进入页面一开始,获取功能开关、输入参数名称、类型及默认值等使用。
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### Query
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<Properties>
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<Property name='user' type='string' key='user'>
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用户标识,由开发者定义规则,需保证用户标识在应用内唯一。
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</Property>
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</Properties>
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### Response
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- `user_input_form` (array[object]) 用户输入表单配置
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- `text-input` (object) 文本输入控件
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- `label` (string) 控件展示标签名
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- `variable` (string) 控件 ID
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- `required` (bool) 是否必填
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- `default` (string) 默认值
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- `paragraph` (object) 段落文本输入控件
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- `label` (string) 控件展示标签名
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- `variable` (string) 控件 ID
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- `required` (bool) 是否必填
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- `default` (string) 默认值
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- `select` (object) 下拉控件
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- `label` (string) 控件展示标签名
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- `variable` (string) 控件 ID
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- `required` (bool) 是否必填
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- `default` (string) 默认值
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- `options` (array[string]) 选项值
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- `file_upload` (object) 文件上传配置
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- `image` (object) 图片设置
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当前仅支持图片类型:`png`, `jpg`, `jpeg`, `webp`, `gif`
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- `enabled` (bool) 是否开启
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- `number_limits` (int) 图片数量限制,默认 3
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- `transfer_methods` (array[string]) 传递方式列表,remote_url , local_file,必选一个
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- `system_parameters` (object) 系统参数
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- `image_file_size_limit` (string) 图片文件上传大小限制(MB)
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</Col>
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<Col sticky>
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<CodeGroup title="Request" tag="GET" label="/parameters" targetCode={` curl -X GET '${props.appDetail.api_base_url}/parameters?user=abc-123'`}>
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```bash {{ title: 'cURL' }}
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curl -X GET '${props.appDetail.api_base_url}/parameters?user=abc-123' \
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--header 'Authorization: Bearer {api_key}'
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```
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</CodeGroup>
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<CodeGroup title="Response">
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```json {{ title: 'Response' }}
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{
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"user_input_form": [
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{
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"paragraph": {
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"label": "Query",
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"variable": "query",
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"required": true,
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"default": ""
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}
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}
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],
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"file_upload": {
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"image": {
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"enabled": false,
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"number_limits": 3,
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"detail": "high",
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"transfer_methods": [
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"remote_url",
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"local_file"
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]
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}
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},
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"system_parameters": {
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"image_file_size_limit": "10"
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}
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}
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```
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</CodeGroup>
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</Col>
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</Row>
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