/// 获取第二页对象列表
public void GetBucketNextPage()
{
//.cssg-snippet-body-start:[get-bucket-next-page]
try
{
string bucket = "examplebucket-1250000000"; //格式：BucketName-APPID
GetBucketRequest request = new GetBucketRequest(bucket);
//上一次拉取数据的下标
request.SetMarker(this.nextMarker);
//执行请求
GetBucketResult result = cosXml.GetBucket(request);
//bucket的相关信息
ListBucket info = result.listBucket;
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx);
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
}
//.cssg-snippet-body-end
}
/// <summary>
/// 获取bukect中的所有文件
/// </summary>
/// <param name="bucketName"></param>
/// <param name="config"></param>
/// <param name="cosCredentialProvider"></param>
/// <returns></returns>
public static List <CloudFile> ListObjects()
{
if (BosConfig == null)
{
return(null);
}
//初始化 CosXmlServer
CosXmlServer cosXml = getCosXmlServer();
GetBucketRequest request = new GetBucketRequest(BosConfig.BucketName);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
request.SetMaxKeys(1 + "");
//执行请求
GetBucketResult result = cosXml.GetBucket(request);
ListBucket listBucket = result.listBucket;
List <ListBucket.Contents> contents = listBucket.contentsList;
List <CloudFile> cloudFiles = new List <CloudFile>();
foreach (ListBucket.Contents content in contents)
{
CloudFile cloudFile = new CloudFile
{
Key = content.key,
Size = content.size,
LastModified = content.lastModified
};
cloudFiles.Add(cloudFile);
}
while (result.listBucket.nextMarker != null)
{
request.SetMarker(result.listBucket.nextMarker);
//执行请求
result = cosXml.GetBucket(request);
foreach (ListBucket.Contents content in result.listBucket.contentsList)
{
CloudFile cloudFile = new CloudFile
{
Key = content.key,
Size = content.size,
LastModified = content.lastModified
};
cloudFiles.Add(cloudFile);
}
}
Console.WriteLine(cloudFiles);
return(cloudFiles);
}
/// 指定前缀批量删除对象
public void DeletePrefix()
{
//.cssg-snippet-body-start:[delete-prefix]
try
{
String nextMarker = null;
// 循环请求直到没有下一页数据
do
{
string bucket = "examplebucket-1250000000"; //存储桶，格式：BucketName-APPID
string prefix = "folder1/"; //指定前缀
GetBucketRequest listRequest = new GetBucketRequest(bucket);
//获取 folder1/ 下的所有对象以及子目录
listRequest.SetPrefix(prefix);
listRequest.SetMarker(nextMarker);
//执行列出对象请求
GetBucketResult listResult = cosXml.GetBucket(listRequest);
ListBucket info = listResult.listBucket;
// 对象列表
List <ListBucket.Contents> objects = info.contentsList;
// 下一页的下标
nextMarker = info.nextMarker;
DeleteMultiObjectRequest deleteRequest = new DeleteMultiObjectRequest(bucket);
//设置返回结果形式
deleteRequest.SetDeleteQuiet(false);
//对象列表
List <string> deleteObjects = new List <string>();
foreach (var content in objects)
{
deleteObjects.Add(content.key);
}
deleteRequest.SetObjectKeys(deleteObjects);
//执行批量删除请求
DeleteMultiObjectResult deleteResult = cosXml.DeleteMultiObjects(deleteRequest);
//打印请求结果
Console.WriteLine(deleteResult.GetResultInfo());
} while (nextMarker != null);
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx);
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
}
//.cssg-snippet-body-end
}
public IEnumerable <IFileEntry> List()
{
bool isTruncated = true;
string filename = null;
while (isTruncated)
{
cosXml = GetCosXml();
string bucket = _cosOptions.Bucket;
string prefix = _cosOptions.Path;
GetBucketRequest request = new GetBucketRequest(bucket);
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
if (!string.IsNullOrEmpty(filename))
{
request.SetMarker(filename);
}
if (!string.IsNullOrEmpty(prefix))
{
request.SetPrefix(prefix);
}
GetBucketResult result = cosXml.GetBucket(request);
ListBucket info = result.listBucket;
isTruncated = result.listBucket.isTruncated;
filename = result.listBucket.nextMarker;
foreach (var item in info.contentsList)
{
var last = DateTime.Parse(item.lastModified);
var fileName = item.key;
if (!string.IsNullOrWhiteSpace(prefix))
{
fileName = fileName.Substring(prefix.Length);
if (fileName.StartsWith("/", StringComparison.Ordinal))
{
fileName = fileName.Trim('/');
}
}
yield return(new FileEntry(fileName, item.size, last, last));
}
}
}
public async Task <List <Item> > ListObjectsAsync(string bucketName, string prefix = null)
{
if (string.IsNullOrEmpty(bucketName))
{
throw new ArgumentNullException(nameof(bucketName));
}
bucketName = ConvertBucketName(bucketName);
ListBucket info = null;
string nextMarker = null;
List <Item> items = new List <Item>();
do
{
GetBucketRequest request = new GetBucketRequest(bucketName);
if (!string.IsNullOrEmpty(nextMarker))
{
request.SetMarker(nextMarker);
}
if (!string.IsNullOrEmpty(prefix))
{
request.SetPrefix(prefix);
}
//执行请求
GetBucketResult result = _client.GetBucket(request);
//bucket的相关信息
info = result.listBucket;
if (info.isTruncated)
{
// 数据被截断，记录下数据下标
nextMarker = info.nextMarker;
}
foreach (var item in info.contentsList)
{
items.Add(new Item()
{
Key = item.key,
LastModified = item.lastModified,
ETag = item.eTag,
Size = (ulong)item.size,
IsDir = false,
BucketName = bucketName,
VersionId = null,
});
}
} while (info.isTruncated);
return(await Task.FromResult(items));
}
