对象存储 OSS：列举文件

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;
import java.util.List;

public class Demo {
    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.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();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 指定前缀，例如exampledir/object。
        String keyPrefix = "exampledir/object";

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        try {
            // 列举文件。如果不设置keyPrefix，则列举存储空间下的所有文件。如果设置keyPrefix，则列举包含指定前缀的文件。
            ObjectListing objectListing = ossClient.listObjects(bucketName, keyPrefix);
            List<OSSObjectSummary> sums = objectListing.getObjectSummaries();
            for (OSSObjectSummary s : sums) {
                System.out.println("\t" + s.getKey());
            }
        } 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\Credentials\EnvironmentVariableCredentialsProvider;
use OSS\OssClient;
use OSS\Core\OssException;

try {
    // 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 = new EnvironmentVariableCredentialsProvider();
    // Endpoint以杭州为例，其它Region请按实际情况填写。
    $endpoint = "http://oss-cn-hangzhou.aliyuncs.com";
    // 填写Bucket名称，例如examplebucket。
    $bucket= "examplebucket";
    $config = array(
        "provider" => $provider,
        "endpoint" => $endpoint,        
    );
    $ossClient = new OssClient($config);
    $listObjectInfo = $ossClient->listObjects($bucket);
    printf("Bucket Name: %s". "\n",$listObjectInfo->getBucketName());
    printf("Prefix: %s". "\n",$listObjectInfo->getPrefix());
    printf("Marker: %s". "\n",$listObjectInfo->getMarker());
    printf("Next Marker: %s". "\n",$listObjectInfo->getNextMarker());
    printf("Max Keys: %s". "\n",$listObjectInfo->getMaxKeys());
    printf("Delimiter: %s". "\n",$listObjectInfo->getDelimiter());
    printf("Is Truncated: %s". "\n",$listObjectInfo->getIsTruncated());
    $objectList = $listObjectInfo->getObjectList();
    $prefixList = $listObjectInfo->getPrefixList();
    if (!empty($objectList)) {
        print("objectList:\n");
        foreach ($objectList as $objectInfo) {
            printf("Object Name: %s". "\n",$objectInfo->getKey());
            printf("Object Size: %s". "\n",$objectInfo->getSize());
            printf("Object Type: %s". "\n",$objectInfo->getType());
            printf("Object ETag: %s". "\n",$objectInfo->getETag());
            printf("Object Last Modified: %s". "\n",$objectInfo->getLastModified());
            printf("Object Storage Class: %s". "\n",$objectInfo->getStorageClass());

            if ($objectInfo->getRestoreInfo()){
                printf("Restore Info: %s". "\n",$objectInfo->getRestoreInfo() );
            }

            if($objectInfo->getOwner()){
                printf("Owner Id:".$objectInfo->getOwner()->getId() . "\n");
                printf("Owner Name:".$objectInfo->getOwner()->getDisplayName() . "\n");
            }
        }
    }
    if (!empty($prefixList)) {
        print("prefixList: \n");
        foreach ($prefixList as $prefixInfo) {
            printf("Common Prefix:%s\n",$prefixInfo->getPrefix());
        }
    }
} catch (OssException $e) {
    printf($e->getMessage() . "\n");
    return;
}

const OSS = require('ali-oss');

const client = new OSS({
  // yourregion填写Bucket所在地域。以华东1（杭州）为例，Region填写为oss-cn-hangzhou。
  region: 'yourregion',
  // 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: process.env.OSS_ACCESS_KEY_ID,
  accessKeySecret: process.env.OSS_ACCESS_KEY_SECRET,
  // yourbucketname填写存储空间名称。
  bucket: 'yourbucketname'
});

async function list () {
    // 不带任何参数，默认最多返回100个文件。
    const result = await client.list();
    console.log(result);
}

list();

# -*- 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Bucket所在地域对应的Endpoint。以华东1（杭州）为例，Endpoint填写为https://oss-cn-hangzhou.aliyuncs.com。
# 填写Bucket名称，例如examplebucket。
bucket = oss2.Bucket(auth, 'https://oss-cn-hangzhou.aliyuncs.com', 'examplebucket')

# 列举Bucket下的所有文件。
for obj in oss2.ObjectIteratorV2(bucket):
    print(obj.key)

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="https://gosspublic.alicdn.com/aliyun-oss-sdk-6.18.0.min.js"></script>
  </head>
  <body>
    <script>      
      const client = new OSS({
        // yourRegion填写Bucket所在地域。以华东1（杭州）为例，yourRegion填写为oss-cn-hangzhou。
        region: "yourRegion",
        // 从STS服务获取的临时访问密钥（AccessKey ID和AccessKey Secret）。
        accessKeyId: 'yourAccessKeyId',
        accessKeySecret: 'yourAccessKeySecret',
        // 从STS服务获取的安全令牌（SecurityToken）。
        stsToken: 'yourSecurityToken',
        // 填写Bucket名称，例如examplebucket。
        bucket: "examplebucket",
      });

      async function list(dir) {
        try {
          // 默认最多返回1000个文件。
          let result = await client.list();
          console.log(result);

          // 从上一次list操作读取的最后一个文件的下一个文件开始继续获取文件列表。
          if (result.isTruncated) {
            let result = await client.list({ marker: result.nextMarker });
          }

          // 列出前缀为'ex'的文件。
          result = await client.list({
            prefix: "ex",
          });
          console.log(result);

          // 列出前缀为'ex'且文件名称字母序'example'之后的文件。
          result = await client.list({
            prefix: "ex",
            marker: "example",
          });
          console.log(result);
        } catch (e) {
          console.log(e);
        }
      }

      list();
    </script>
  </body>
</html>
          

using Aliyun.OSS;
// yourEndpoint填写Bucket对应的Endpoint，以华东1（杭州）为例，填写为https://oss-cn-hangzhou.aliyuncs.com。其它Region请按实际情况填写。
var endpoint = "yourEndpoint";
// 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Bucket名称，例如examplebucket。
var bucketName = "examplebucket";
// 创建OssClient实例。
var client = new OssClient(endpoint, accessKeyId, accessKeySecret);
try
{
    var listObjectsRequest = new ListObjectsRequest(bucketName);
    // 简单列举Bucket中的文件，默认返回100条记录。
    var result = client.ListObjects(listObjectsRequest);
    Console.WriteLine("List objects succeeded");
    foreach (var summary in result.ObjectSummaries)
    {
        Console.WriteLine("File name:{0}", summary.Key);
    }
}
catch (Exception ex)
{
    Console.WriteLine("List objects failed. {0}", ex.Message);
}

// 填写Bucket名称，例如examplebucket。
ListObjectsRequest request = new ListObjectsRequest("examplebucket");
// 填写返回文件的最大个数。如果不设置此参数，则默认值为100，maxkeys的取值不能大于1000。
request.setMaxKeys(20);

oss.asyncListObjects(request, new OSSCompletedCallback<ListObjectsRequest, ListObjectsResult>() {
    @Override
    public void onSuccess(ListObjectsRequest request, ListObjectsResult result) {
        for (OSSObjectSummary objectSummary : result.getObjectSummaries()) {
            Log.i("ListObjects", objectSummary.getKey());
        }
    }

    @Override
    public void onFailure(ListObjectsRequest request, ClientException clientException, ServiceException serviceException) {
        // 请求异常。
        if (clientException != null) {
            // 客户端异常，例如网络异常等。
            clientException.printStackTrace();
        }
        if (serviceException != null) {
            // 服务端异常。
            Log.e("ErrorCode", serviceException.getErrorCode());
            Log.e("RequestId", serviceException.getRequestId());
            Log.e("HostId", serviceException.getHostId());
            Log.e("RawMessage", serviceException.getRawMessage());
        }
    }
});

package main
import (
    "fmt"
    "os"
    "github.com/aliyun/aliyun-oss-go-sdk/oss"
)
func HandleError(err error) {
    fmt.Println("Error:", err)
    os.Exit(-1)
}
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Bucket对应的Endpoint，以华东1（杭州）为例，填写为https://oss-cn-hangzhou.aliyuncs.com。其它Region请按实际情况填写。
    client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))
    if err != nil {
         HandleError(err)
    }
    // 填写存储空间名称。
    bucketName := "yourBucketName"
    bucket, err := client.Bucket(bucketName)
    if err != nil {
         HandleError(err)
    }
    continueToken := ""
    for {
         lsRes, err := bucket.ListObjectsV2(oss.ContinuationToken(continueToken))
         if err != nil {
             HandleError(err)
          }
          // 打印列举结果。默认情况下，一次返回100条记录。
          for _, object := range lsRes.Objects {
              fmt.Println(object.Key, object.Type, object.Size, object.ETag, object.LastModified, object.StorageClass)
          }
          if lsRes.IsTruncated {
              continueToken = lsRes.NextContinuationToken
          } else {
              break
          }
      }
}

OSSGetBucketRequest * getBucket = [OSSGetBucketRequest new];
// 填写Bucket名称，例如examplebucket。
getBucket.bucketName = @"examplebucket";
// 填写返回文件的最大个数。如果不设置此参数，则默认值为100，maxkeys的取值不能大于1000。
getBucket.maxKeys = 20;

OSSTask * getBucketTask = [client getBucket:getBucket];
[getBucketTask continueWithBlock:^id(OSSTask *task) {
    if (!task.error) {
        OSSGetBucketResult * result = task.result;
        NSLog(@"get bucket success!");
        for (NSDictionary * objectInfo in result.contents) {
            NSLog(@"list object: %@", objectInfo);
        }
    } else {
        NSLog(@"get bucket failed, error: %@", task.error);
    }
    return nil;
}];

#include <alibabacloud/oss/OssClient.h>
using namespace AlibabaCloud::OSS;

int main(void)
{
    /* 初始化OSS账号信息。*/
            
    /* 填写Bucket所在地域对应的Endpoint。以华东1（杭州）为例，Endpoint填写为https://oss-cn-hangzhou.aliyuncs.com。*/
    std::string Endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
    /* 填写Bucket名称，例如examplebucket。*/
    std::string BucketName = "examplebucket";

    /* 初始化网络等资源。*/
    InitializeSdk();

    ClientConfiguration conf;
    /* 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。*/
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);

    /* 列举文件。*/
    ListObjectsRequest request(BucketName);
    auto outcome = client.ListObjects(request);

    if (!outcome.isSuccess())  {    
        /* 异常处理。*/
        std::cout << "ListObjects fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;  
    }
    else {
        for (const auto& object : outcome.result().ObjectSummarys()) {
            std::cout << "object"<<
            ",name:" << object.Key() <<
            ",size:" << object.Size() <<
            ",lastmodify time:" << object.LastModified() << std:: endl;
         }      
    }

    /* 释放网络等资源。*/
    ShutdownSdk();
    return 0;
}

#include "oss_api.h"
#include "aos_http_io.h"
/* yourEndpoint填写Bucket所在地域对应的Endpoint。以华东1（杭州）为例，Endpoint填写为https://oss-cn-hangzhou.aliyuncs.com。*/
const char *endpoint = "yourEndpoint";
/* 填写Bucket名称，例如examplebucket。*/
const char *bucket_name = "examplebucket";
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"));
    /* 是否设置了CNAME。0表示不设置。*/
    options->config->is_cname = 0;
    /* 用于设置网络相关参数，比如超时时间等。*/
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
    /* 在程序入口调用aos_http_io_initialize方法来初始化网络、内存等全局资源。*/
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        exit(1);
    }
    /* 用于内存管理的内存池（pool），等价于apr_pool_t。其实现代码在apr库中。*/
    aos_pool_t *pool;
    /* 重新创建一个内存池，第二个参数值是NULL，表示没有继承其它内存池。*/
    aos_pool_create(&pool, NULL);
    /* 创建并初始化options，该参数包括endpoint、access_key_id、access_key_secret、is_cname、curl等全局配置信息。*/
    oss_request_options_t *oss_client_options;
    /* 在内存池中分配内存给options。*/
    oss_client_options = oss_request_options_create(pool);
    /* 初始化Client的选项oss_client_options。*/
    init_options(oss_client_options);
    /* 初始化参数。*/
    aos_string_t bucket;
    aos_status_t *resp_status = NULL; 
    oss_list_object_params_t *params = NULL;
    oss_list_object_content_t *content = NULL;
    int size = 0;
    char *line = NULL;
    char *prefix = "";
    char *nextMarker = "";
    aos_str_set(&bucket, bucket_name);
    params = oss_create_list_object_params(pool);
    /* 通过max_ret参数设置需要返回的文件数量。*/
    /* 默认列举文件数量最多为1000个。如果列举的文件数量超出1000，则只返回按字母排序的前1000个文件，且返回结果中的truncated为true，并返回next_marker作为下次读取的起点。*/
    params->max_ret = 100;
    aos_str_set(&params->prefix, prefix);
    aos_str_set(&params->marker, nextMarker);
    printf("Object\tSize\tLastModified\n");
    /* 列举所有文件。*/
    do {
        resp_status = oss_list_object(oss_client_options, &bucket, params, NULL);
        if (!aos_status_is_ok(resp_status))
        {
            printf("list object failed\n");
            break;
        }
        aos_list_for_each_entry(oss_list_object_content_t, content, &params->object_list, node) {
            ++size;
            line = apr_psprintf(pool, "%.*s\t%.*s\t%.*s\n", content->key.len, content->key.data, 
                content->size.len, content->size.data, 
                content->last_modified.len, content->last_modified.data);
            printf("%s", line);
        }
        nextMarker = apr_psprintf(pool, "%.*s", params->next_marker.len, params->next_marker.data);
        aos_str_set(&params->marker, nextMarker);
        aos_list_init(&params->object_list);
        aos_list_init(&params->common_prefix_list);
    } while (params->truncated == AOS_TRUE);
    printf("Total %d\n", size);
    /* 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(pool);
    /* 释放之前分配的全局资源。*/
    aos_http_io_deinitialize();
    return 0;
}