如何在OSS SDK中配置CDN加速域名

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.model.*;
public class Demo {
    public static void main(String[] args) throws Exception {
        // 填写已配置CDN加速服务的自定义域名，例如example.com。
        String endpoint = "http://example.com";
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
              
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
        try {
            // 创建ClientConfiguration实例，您可以根据实际情况修改默认参数。
            ClientBuilderConfiguration conf = new ClientBuilderConfiguration();
            // 开启CNAME。CNAME用于将自定义域名绑定到目标Bucket。
            conf.setSupportCname(true);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}

use OSS\OssClient;
use OSS\Core\OssException;

// 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
$accessKeyId = getenv("OSS_ACCESS_KEY_ID");
$accessKeySecret = getenv("OSS_ACCESS_KEY_SECRET");
// 填写已配置CDN加速服务的自定义域名，例如example.com。
$endpoint = "https://example.com";

try {
    // 开启CNAME。CNAME用于将自定义域名绑定到目标Bucket。
    $ossClient = new OssClient($accessKeyId, $accessKeySecret, $endpoint, true);
} catch (OssException $e) {
    print $e->getMessage();
}                    

# -*- coding: utf-8 -*-
import oss2
from oss2.credentials import EnvironmentVariableCredentialsProvider

# 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
auth = oss2.ProviderAuth(EnvironmentVariableCredentialsProvider())

# 填写已配置CDN加速服务的自定义域名，例如example.com。
cname = 'http://example.com'

# 通过设置is_cname=True来开启CNAME，CNAME用于将自定义域名绑定到目标Bucket。
bucket = oss2.Bucket(auth, cname, 'examplebucket', is_cname=True)                   

using Aliyun.OSS;
using Aliyun.OSS.Common;

// 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
var accessKeyId = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_ID");
var accessKeySecret = Environment.GetEnvironmentVariable("OSS_ACCESS_KEY_SECRET");
// 填写已配置CDN加速服务的自定义域名，例如example.com。
const string endpoint = "https://example.com";

// 创建ClientConfiguration实例，按照实际需求修改默认参数。
var conf = new ClientConfiguration();
// 开启CNAME，CNAME用于将自定义域名绑定到目标Bucket。
conf.IsCname = true;

// 创建OssClient实例。
var client = new OssClient(endpoint, accessKeyId, accessKeySecret, conf);                    

package main

    import (
        "fmt"
        "os"
        "github.com/aliyun/aliyun-oss-go-sdk/oss"
    )

func main() {
    // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
    provider, err := oss.NewEnvironmentVariableCredentialsProvider()
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // 创建OSSClient实例。
    // yourEndpoint填写已配置CDN加速服务的自定义域名，例如example.com。
    client, err := oss.New("https://example.com", "", "", oss.UseCname(true), oss.SetCredentialsProvider(&provider))
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }  

#include "oss_api.h"
#include "aos_http_io.h"
/* 填写已配置CDN加速服务的自定义域名，例如example.com。*/
const char *endpoint = "https://example.com";

void init_options(oss_request_options_t *options) {
    options->config = oss_config_create(options->pool);
    /* 用char*类型的字符串初始化aos_string_t类型。*/
    aos_str_set(&options->config->endpoint, endpoint);
    /* 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。*/    
    aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID"));
    aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET"));
    /* 开启CNAME，CNAME用于将自定义域名绑定到目标Bucket。*/
    options->config->is_cname = 1;
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main() {
    aos_pool_t *p;
    oss_request_options_t *options;
    /* 初始化全局变量。*/
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        return -1;
    }
    /* 初始化内存池和options。*/
    aos_pool_create(&p, NULL);
    options = oss_request_options_create(p);
    init_options(options); 
    /* 释放内存池，相当于释放了请求过程中各资源分配的内存。*/
    aos_pool_destroy(p);
    /* 释放此前分配的全局资源。*/
    aos_http_io_deinitialize();
    return 0;
}