# 查询弹性公网IP可用数 - CountEipAvailableResources
#### 功能介绍
查询指定IP池可用弹性公网IP的个数。
#### 调试
您可以在[API Explorer](https://console.huaweicloud.com/apiexplorer/#/openapi/EIP/doc?api=CountEipAvailableResources&version=v3)中调试该接口，支持自动认证鉴权。
#### 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-eip/eip_apipermission_0000.html)。
- 如果使用身份策略授权，当前API调用无需身份策略权限。
 
#### URI
POST /v3/{project_id}/eip/resources/available
表1路径参数 
| 参数         | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|:---|:---|:---|:---|
| project_id | 是    | String | - 参数解释：项目ID。[请参见获取项目ID](https://support.huaweicloud.com/api-eip/eip_api06_0004.html) - 取值范围：不涉及       最大长度：**32** |
   
#### 请求参数
表2请求Body参数 
| 参数    | 是否必选 | 参数类型    | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|:---|:---|:---|:---|
| type  | 是    | String  | - 参数解释：指定公共池类型。   - 约束限制：不涉及   - 取值范围：所有的公共池类型 - 5_bgp：动态bgp公共IP池。   - 5_sbgp：静态bgp公共IP池。   - 5_testbgp:IP测试池      - 默认取值：不涉及    |
| limit | 否    | Integer | 查询指定公共池类型剩余可用IP数量                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
   
#### 响应参数
**状态码：200**
表3响应Body参数 
| 参数     | 参数类型    | 描述                                                                                                                                                                                                                                |
|:---|:---|:---|
| result | Integer | - 功能说明：公共池可用的IP数量返回值    |
   
#### 请求示例
```
{
  "limit" : 5,
  "type" : "5_bgp"
}
```
#### 响应示例
**状态码：200**
```
{
  "result" : 5
}
```
#### 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.BasicCredentials;
  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.eip.v3.region.EipRegion;
  import com.huaweicloud.sdk.eip.v3.*;
  import com.huaweicloud.sdk.eip.v3.model.*;
  public class CountEipAvailableResourcesSolution {
      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");
          String projectId = "{project_id}";
          ICredential auth = new BasicCredentials()
                  .withProjectId(projectId)
                  .withAk(ak)
                  .withSk(sk);
          EipClient client = EipClient.newBuilder()
                  .withCredential(auth)
                  .withRegion(EipRegion.valueOf("<YOUR REGION>"))
                  .build();
          CountEipAvailableResourcesRequest request = new CountEipAvailableResourcesRequest();
          try {
              CountEipAvailableResourcesResponse response = client.countEipAvailableResources(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 BasicCredentials
  from huaweicloudsdkeip.v3.region.eip_region import EipRegion
  from huaweicloudsdkcore.exceptions import exceptions
  from huaweicloudsdkeip.v3 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"]
      projectId = "{project_id}"
      credentials = BasicCredentials(ak, sk, projectId)
      client = EipClient.new_builder() \
          .with_credentials(credentials) \
          .with_region(EipRegion.value_of("<YOUR REGION>")) \
          .build()
      try:
          request = CountEipAvailableResourcesRequest()
          response = client.count_eip_available_resources(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/basic"
      eip "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/eip/v3"
  "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/eip/v3/model"
      region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/eip/v3/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")
      projectId := "{project_id}"
      auth, err := basic.NewCredentialsBuilder().
          WithAk(ak).
          WithSk(sk).
          WithProjectId(projectId).
          SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      hcClient, err := eip.EipClientBuilder().
           WithRegion(region.ValueOf("<YOUR REGION>")).
           WithCredential(auth).
           SafeBuild()
      if err != nil {
          fmt.Println(err)
          return
      }
      client := eip.NewEipClient(hcClient)
      request := &model.CountEipAvailableResourcesRequest{}
  response, err := client.CountEipAvailableResources(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/EIP/sdk?api=CountEipAvailableResources&version=v3)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-eip/ErrorCode.html)。
