# 创建预热缓存任务 - CreatePreheatingTasks
#### 功能介绍
创建预热任务。
- 单租户调用频率：30次/s。
  
 
#### 调用方法
请参见[如何调用API](https://support.huaweicloud.com/api-cdn/cdn_02_0019.html)。
#### 授权信息
账号具备所有API的调用权限，如果使用账号下的IAM用户调用当前API，该IAM用户需具备调用API所需的权限。
- 如果使用角色与策略授权，具体权限要求请参见[权限和授权项](https://support.huaweicloud.com/api-cdn/cdn_02_0020.html)。
- 如果使用身份策略授权，需具备如下身份策略权限。
  
  | 授权项                            | 访问级别  | 资源类型（\*为必须） | 条件键                   | 别名 | 依赖的授权项 |
  |:---|:---|:---|:---|:---|:---|
  | cdn:configuration:preheatCache | Write | -           | g:EnterpriseProjectId | -  | -      |
     
  
 
#### URI
POST /v1.0/cdn/content/preheating-tasks
表1Query参数 
| 参数                    | 是否必选 | 参数类型   | 描述                                                                                                                                                                               |
|:---|:---|:---|:---|
| enterprise_project_id | 否    | String | 当用户开启企业项目功能时，该参数生效，表示在当前企业项目下添加缓存预热任务，"all"代表所有项目。注意：当使用子账号调用接口时，该参数必传。 您可以通过调用企业项目管理服务（EPS）的查询企业项目列表接口（ListEnterpriseProject）查询企业项目id。 |
   
#### 请求参数
表2请求Header参数 
| 参数           | 是否必选 | 参数类型   | 描述                                                                                                 |
|:---|:---|:---|:---|
| X-Auth-Token | 是    | String | 用户Token。 通过调用IAM服务获取用户Token接口获取（响应消息头中X-Subject-Token的值）。 |
   
表3请求Body参数 
| 参数              | 是否必选 | 参数类型                                                                                          | 描述      |
|:---|:---|:---|:---|
| preheating_task | 是    | [PreheatingTaskRequestBody] object | 缓存预热设置。 |
   
 表4PreheatingTaskRequestBody 
| 参数            | 是否必选 | 参数类型             | 描述                                                                                                        |
|:---|:---|:---|:---|
| zh_url_encode | 否    | Boolean          | 是否对url中的中文字符进行编码后预热，默认值为false。false代表不开启，true代表开启，开启后仅预热转码后的URL。                                          |
| urls          | 是    | Array of strings | 需要预热的URL必须带有"http://"或"https://"，多个URL用逗号分隔（"url1", "url2"），目前不支持对目录的预热，单个url的长度限制为4096字符,单次最多输入1000个url。 |
   
#### 响应参数
**状态码：200**
表5响应Body参数 
| 参数              | 参数类型   | 描述    |
|:---|:---|:---|
| preheating_task | String | 任务ID。 |
   
#### 请求示例
```
POST https://cdn.myhuaweicloud.com/v1.0/cdn/content/preheating-tasks?enterprise_project_id=0
{
  "preheating_task" : {
    "urls" : [ "https://www.bxxx/1.txt", "http://www.bxxx/2.txt" ]
  }
}
```
#### 响应示例
**状态码：200**
OK
```
{
  "preheating_task" : "7620242"
}
```
#### SDK代码示例
SDK代码示例如下。
- [Java]
  ```
  package com.huaweicloud.sdk.test;
  import com.huaweicloud.sdk.core.auth.ICredential;
  import com.huaweicloud.sdk.core.auth.GlobalCredentials;
  import com.huaweicloud.sdk.core.exception.ConnectionException;
  import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
  import com.huaweicloud.sdk.core.exception.ServiceResponseException;
  import com.huaweicloud.sdk.cdn.v2.region.CdnRegion;
  import com.huaweicloud.sdk.cdn.v2.*;
  import com.huaweicloud.sdk.cdn.v2.model.*;
  import java.util.List;
  import java.util.ArrayList;
  public class CreatePreheatingTasksSolution {
      public static void main(String[] args) {
          // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
          // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
          String ak = System.getenv("CLOUD_SDK_AK");
          String sk = System.getenv("CLOUD_SDK_SK");
          ICredential auth = new GlobalCredentials()
                  .withAk(ak)
                  .withSk(sk);
          CdnClient client = CdnClient.newBuilder()
                  .withCredential(auth)
                  .withRegion(CdnRegion.valueOf("<YOUR REGION>"))
                  .build();
          CreatePreheatingTasksRequest request = new CreatePreheatingTasksRequest();
          PreheatingTaskRequest body = new PreheatingTaskRequest();
          List<String> listPreheatingTaskUrls = new ArrayList<>();
          listPreheatingTaskUrls.add("https://www.bxxx/1.txt");
          listPreheatingTaskUrls.add("http://www.bxxx/2.txt");
          PreheatingTaskRequestBody preheatingTaskbody = new PreheatingTaskRequestBody();
          preheatingTaskbody.withUrls(listPreheatingTaskUrls);
          body.withPreheatingTask(preheatingTaskbody);
          request.withBody(body);
          try {
              CreatePreheatingTasksResponse response = client.createPreheatingTasks(request);
              System.out.println(response.toString());
          } catch (ConnectionException e) {
              e.printStackTrace();
          } catch (RequestTimeoutException e) {
              e.printStackTrace();
          } catch (ServiceResponseException e) {
              e.printStackTrace();
              System.out.println(e.getHttpStatusCode());
              System.out.println(e.getRequestId());
              System.out.println(e.getErrorCode());
              System.out.println(e.getErrorMsg());
          }
      }
  }
  ```
- [Python]
  ```
  # coding: utf-8
  import os
  from huaweicloudsdkcore.auth.credentials import GlobalCredentials
  from huaweicloudsdkcdn.v2.region.cdn_region import CdnRegion
  from huaweicloudsdkcore.exceptions import exceptions
  from huaweicloudsdkcdn.v2 import *
  if __name__ == "__main__":
      # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
      # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
      ak = os.environ["CLOUD_SDK_AK"]
      sk = os.environ["CLOUD_SDK_SK"]
      credentials = GlobalCredentials(ak, sk)
      client = CdnClient.new_builder() \
          .with_credentials(credentials) \
          .with_region(CdnRegion.value_of("<YOUR REGION>")) \
          .build()
      try:
          request = CreatePreheatingTasksRequest()
          listUrlsPreheatingTask = [
              "https://www.bxxx/1.txt",
              "http://www.bxxx/2.txt"
          ]
          preheatingTaskbody = PreheatingTaskRequestBody(
              urls=listUrlsPreheatingTask
          )
          request.body = PreheatingTaskRequest(
              preheating_task=preheatingTaskbody
          )
          response = client.create_preheating_tasks(request)
          print(response)
      except exceptions.ClientRequestException as e:
          print(e.status_code)
          print(e.request_id)
          print(e.error_code)
          print(e.error_msg)
  ```
- [Go]
  ```
  package main
  import (
  "fmt"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/global"
      cdn "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/cdn/v2"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/cdn/v2/model"
      region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/cdn/v2/region"
  )
  func main() {
      // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
      // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
      ak := os.Getenv("CLOUD_SDK_AK")
      sk := os.Getenv("CLOUD_SDK_SK")
      auth, err := global.NewCredentialsBuilder().
          WithAk(ak).
          WithSk(sk).
          SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      hcClient, err := cdn.CdnClientBuilder().
           WithRegion(region.ValueOf("<YOUR REGION>")).
           WithCredential(auth).
           SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      client := cdn.NewCdnClient(hcClient)
      request := &model.CreatePreheatingTasksRequest{}
  var listUrlsPreheatingTask = []string{
          "https://www.bxxx/1.txt",
      "http://www.bxxx/2.txt",
      }
  preheatingTaskbody := &model.PreheatingTaskRequestBody{
  Urls: listUrlsPreheatingTask,
  }
  request.Body = &model.PreheatingTaskRequest{
  PreheatingTask: preheatingTaskbody,
  }
  response, err := client.CreatePreheatingTasks(request)
  if err == nil {
          fmt.Printf("%+v\n", response)
      } else {
          fmt.Println(err)
      }
  }
  ```
- [更多]
  更多编程语言的SDK代码示例，请参见[API Explorer](https://console.huaweicloud.com/apiexplorer/#/openapi/CDN/sdk?api=CreatePreheatingTasks&version=v2)的代码示例页签，可生成自动对应的SDK代码示例。
#### 状态码
| 状态码 | 描述 |
|:---|:---|
| 200 | OK |
   
#### 错误码
请参见[错误码](https://support.huaweicloud.com/api-cdn/ErrorCode.html)。