# 查询视频任务

`GET /v1/video/tasks/{task_id}`

读取任务当前状态、交付情况、用量与结算摘要。任务状态、交付状态和结算状态分别表示执行、文件交付与费用处理进度。结果下载过期或暂不可用时，下载地址为空。

- 在请求头 `Authorization: Bearer` 后面放 API 密钥。
- 返回任务状态、交付、用量和结算摘要；`status` 为终态前继续查询。
- 成功后从 `output.assets[].url` 下载结果；链接过期或暂不可用时为空。

## 请求头

| 字段 | 类型 | 要求 | 说明 |
| --- | --- | --- | --- |
| `Authorization` | string | 必填 | Bearer 加一个空格和 API 密钥。缺失或无效时返回 401 authentication_failed。 |
| `X-Request-ID` | string | 可选 | 你自己的请求标识。无效或重复的值会被替换，最终值在响应头 X-Request-ID 返回。 |

## 路径参数

| 字段 | 类型 | 要求 | 说明 |
| --- | --- | --- | --- |
| `task_id` | string | 必填 | 平台视频任务标识 |

## 返回 · HTTP 200

当前任务、交付、用量与结算信息。

返回「[视频任务对象](./api-docs-zh-api-video-tasks-object.md)」，字段说明见该页。

### 响应头

| 字段 | 类型 | 要求 | 说明 |
| --- | --- | --- | --- |
| `X-Request-ID` | string | 必填 | 本次请求的标识：你提供的有效值，或替换后的值。 |

## 状态码

每个 `error.code` 的处理办法见「[错误码](./api-docs-zh-api-errors.md)」。

| 状态码 | 说明 | error.code |
| --- | --- | --- |
| 200 | 当前任务、交付、用量与结算信息。 |  |
| 400 | 请求无效。 | invalid_request |
| 401 | API 密钥缺失或无效。 响应头：`WWW-Authenticate` | authentication_failed |
| 404 | 任务不存在或对本团队不可见。 | task_not_found |
| 429 | 请求频率限制拒绝此非创建操作。 响应头：`Retry-After` | rate_limited |
| 500 | 服务内部错误。 | internal_error |
| 503 | 服务暂时不可用。 | dependency_unavailable |

## 相关指南

- [任务状态与结果](./api-docs-zh-video-tasks.md)
- [快速开始](./api-docs-zh-quickstart.md)
- [接收回调](./api-docs-zh-callbacks.md)

## 请求示例

```bash
curl --request GET "${CHENVOYA_BASE_URL}/v1/video/tasks/${TASK_ID}" \
  --header "Authorization: Bearer ${CHENVOYA_API_KEY}"
```

```python
import urllib.request
import urllib.parse
import json
import os
import sys
import re
import uuid

key = os.environ["CHENVOYA_API_KEY"].strip()
if not key or re.search(r"[\x00-\x1f\x7f-\x9f]", key):
    sys.exit("Set CHENVOYA_API_KEY to a non-empty value without control characters")
base = os.environ["CHENVOYA_BASE_URL"].rstrip("/")
headers = {"Authorization": "Bearer " + key}
TASK_ID = os.environ["TASK_ID"]
path = "/v1/video/tasks/{task_id}".replace("{task_id}", urllib.parse.quote(TASK_ID, safe=""))
request = urllib.request.Request(base + path, data=None, headers=headers, method="GET")
try:
    with urllib.request.urlopen(request) as response:
        print(response.read().decode("utf-8"))
except urllib.request.HTTPError as error:
    print(error.read().decode("utf-8"))
    sys.exit(1)
```

```javascript
// 需要 Node.js 20 及以上版本，保存为 .mjs 文件后运行。
const key = process.env.CHENVOYA_API_KEY?.trim();
if (!key || /[\x00-\x1f\x7f-\x9f]/.test(key)) {
  console.error("Set CHENVOYA_API_KEY to a non-empty value without control characters");
  process.exit(1);
}
const base = process.env.CHENVOYA_BASE_URL;
if (!base) throw new Error("Set CHENVOYA_BASE_URL");
const headers = {Authorization: `Bearer ${key}`};
const TASK_ID = process.env.TASK_ID;
if (!TASK_ID) throw new Error("Set TASK_ID");
const path = "/v1/video/tasks/{task_id}".replace("{task_id}", encodeURIComponent(TASK_ID));
const response = await fetch(base.replace(/\/$/, "") + path, {method: "GET", headers, body: undefined});
console.log(await response.text());
if (!response.ok) process.exitCode = 1;
```

```go
package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
	"os"
	"regexp"
	"strings"
)

func main() {
	key := strings.TrimSpace(os.Getenv("CHENVOYA_API_KEY"))
	if key == "" || regexp.MustCompile(`[\x00-\x1f\x7f-\x9f]`).MatchString(key) {
		fail("Set CHENVOYA_API_KEY to a non-empty value without control characters")
	}
	base := strings.TrimRight(os.Getenv("CHENVOYA_BASE_URL"), "/")
	if base == "" {
		fail("Set CHENVOYA_BASE_URL")
	}
	taskID := os.Getenv("TASK_ID")
	if taskID == "" {
		fail("Set TASK_ID")
	}
	path := strings.Replace("/v1/video/tasks/{task_id}", "{task_id}", url.PathEscape(taskID), 1)
	request, err := http.NewRequest("GET", base+path, nil)
	if err != nil {
		fail(err.Error())
	}
	request.Header.Set("Authorization", "Bearer "+key)
	response, err := http.DefaultClient.Do(request)
	if err != nil {
		fail(err.Error())
	}
	text, err := io.ReadAll(response.Body)
	response.Body.Close()
	if err != nil {
		fail(err.Error())
	}
	fmt.Println(string(text))
	if response.StatusCode < 200 || response.StatusCode > 299 {
		os.Exit(1)
	}
}

func fail(message string) {
	fmt.Fprintln(os.Stderr, message)
	os.Exit(1)
}
```

## 响应示例

200

```json
{
  "id": "task_32ae2a5177b310d3bc1ec83a98f63889",
  "object": "video.task",
  "request_id": "req_6acd96894df9798feb0ddb21e5a52d70",
  "billing_correlation_id": "billcorr_2f6c57065a4404b27fb9b6b24ea9a0d0",
  "model": "dreamina-seedance-2-0-260128",
  "status": "succeeded",
  "phase": null,
  "delivery_status": "available",
  "settlement_status": "settled",
  "created_at": 1793167380,
  "started_at": 1793167381,
  "completed_at": 1793167382,
  "usage": {
    "meter_type": "seedance_video_generation",
    "video_tokens": 51652,
    "output_duration_seconds": 5,
    "input_video_duration_seconds": 0,
    "resolution": "720p",
    "fps": 24,
    "has_reference_video": false
  },
  "billing": {
    "currency": "USD",
    "final_actual_cost": "0.361564",
    "collected_liability_amount": "0.361564",
    "funding_debit_amount": "0.361564",
    "refunded_liability_amount": "0.000000",
    "funding_refund_amount": "0.000000",
    "outstanding_receivable": "0.000000",
    "billing_url": "/v1/video/tasks/task_32ae2a5177b310d3bc1ec83a98f63889/billing"
  },
  "output": {
    "assets": [
      {
        "asset_id": "asset_4d00c4c64086b1e29724c1f2349f3708",
        "media_type": "video",
        "role": "result",
        "url": "https://media.example.invalid/download/result-0001?signature=example",
        "materialized_at": 1793167385,
        "expires_at": 1793253785,
        "delivery_source": "platform",
        "materialization_status": "completed",
        "download_status": "available"
      }
    ]
  },
  "cancellation": null,
  "error": null
}
```

400

```json
{
  "error": {
    "code": "invalid_request",
    "message": "request parameters are invalid"
  },
  "trace_id": "trace_error_example"
}
```

401

```json
{
  "error": {
    "code": "authentication_failed",
    "message": "authentication failed"
  },
  "trace_id": "trace_error_example"
}
```

404

```json
{
  "error": {
    "code": "task_not_found",
    "message": "task was not found"
  },
  "trace_id": "trace_error_example"
}
```

429

```json
{
  "error": {
    "code": "rate_limited",
    "message": "request rate limit exceeded"
  },
  "trace_id": "trace_error_example"
}
```

500

```json
{
  "error": {
    "code": "internal_error",
    "message": "internal server error"
  },
  "trace_id": "trace_error_example"
}
```

503

```json
{
  "error": {
    "code": "dependency_unavailable",
    "message": "service is not ready"
  },
  "trace_id": "trace_error_example"
}
```