Golang SDK for 新浪云存储

import sdk "github.com/SinaCloudStorage/SinaCloudStorage-SDK-Go"

CONSTANTS

const (
    Private           = ACL("private")
    PublicRead        = ACL("public-read")
    PublicReadWrite   = ACL("public-read-write")
    AuthenticatedRead = ACL("authenticated-read")
)

TYPES

type ACL string
快捷ACL

private 			Bucket和Object 	Owner权限 = FULL_CONTROL,其他人没有任何权限
public-read 		Bucket和Object 	Owner权限 = FULL_CONTROL,GRPS000000ANONYMOUSE权限 = READ
public-read-write 	Bucket和Object 	Owner权限 = FULL_CONTROL,GRPS000000ANONYMOUSE权限 = READ + WRITE
authenticated-read 	Bucket和Object 	Owner权限 = FULL_CONTROL,GRPS0000000CANONICAL权限 = READ
GRPS0000000CANONICAL:此组表示所有的新浪云存储注册帐户。
					  所有的请求必须签名(认证),如果签名认证通过,即可按照已设置的权限规则进行访问。
GRPS000000ANONYMOUSE:匿名用户组,对应的请求可以不带签名。
SINA000000000000IMGX:图片处理服务,将您的bucket的ACL设置为对
					  SINA000000000000IMGX的读写权限,在您使用图片处理服务的时候可以免签名。
type SCS struct {
    AccessKey string
    SecretKey string
    EndPoint  string
}
type Bucket struct {
    *SCS
    Name string
}

BUCKETS AND OBJECTS OPERATIONS

func NewSCS

func NewSCS(accessKey, secretKey, endPoint string) (scs *SCS)

创建一个SCS类

示例:

import sdk "github.com/SinaCloudStorage/SinaCloudStorage-SDK-Go"
// ak 和 sk 可以从https://scs.sinacloud.com管理面板处获取
scs := sdk.NewSCS(ak, sk, "http://sinacloud.net")

func (scs *SCS) Bucket

func (scs *SCS) Bucket(name string) *Bucket

返回一个名为name的Bucket类

func (b *Bucket) ListBucket

func (b *Bucket) ListBucket() (data []byte, err error)

列出用户账户下所有的buckets

func (b *Bucket) ListObject

func (b *Bucket) ListObject(prefix, delimiter, marker string, maxKeys int) (data []byte, err error)

列出Bucket下的所有objects

delimiter	折叠显示字符,通常使用:'/'
			"" 时,以"join/mailaddresss.txt" 这种”目录+object“的形式展示,
			"/" 时,以"join" 这种"目录"的形式展示,不会展开目录
prefix		列出以指定字符为开头的Key,可为""空字符串
marker		Key的初始位置,系统将列出比Key大的值,通常用作‘分页’的场景,可为""空字符串
max-keys	返回值的最大Key的数量

func (b *Bucket) GetBucketInfo

func (b *Bucket) GetBucketInfo(info string) (data []byte, err error)

获取bucket的meta或acl信息,"info"值为"meta" or "acl"

func (b *Bucket) PutBucket

func (b *Bucket) PutBucket(acl ACL) error

创建bucket

func (b *Bucket) DelBucket

func (b *Bucket) DelBucket() error

删除bucket

func (b *Bucket) GetInfo

func (b *Bucket) GetInfo(object string, info string) (data []byte, err error)

获取object的meta或acl信息,"info"值为"meta" or "acl"

func (b *Bucket) Get

func (b *Bucket) Get(object string) (data []byte, err error)

下载object

示例:

	scs := sdk.NewSCS(ak, sk, "http://sinacloud.net")
	bt := scs.Bucket("bucketname")

	fd, err := os.Create("/tmp/3.png")
    if err != nil {
    	return err
    }
	data, err := bt.Get("3.png")
    if err != nil {
    	return err
    }
	n, err := fd.Write(data)
    if err != nil {
    	return err
    }
    fmt.Println(n)

func (b *Bucket) GetRange

func (b *Bucket) Get(object string, offset int64) (data []byte, err error)

通过range方式下载object

示例:

	scs := sdk.NewSCS(ak, sk, "http://sinacloud.net")
	bt := scs.Bucket("bucketname")

	fd, err := os.Create("/tmp/3.txt")
    if err != nil {
    	return err
    }
	data, err := bt.Get("3.txt", 5)
    if err != nil {
    	return err
    }
    fmt.Println(string(data))

func (b *Bucket) Put

func (b *Bucket) Put(object, uploadFile string, acl ACL) error

上传object

示例:

	err := bt.Put("test.go", "/tmp/test.go", sdk.Private)
	if err != nil {
		return err
	}

func (b *Bucket) PutExpire

func (b *Bucket) PutExpire(object, uploadFile string, acl ACL, expire time.Time) error

文件object并添加文件过期时间

示例:

	err := bt.PutExpire("test.go", "/tmp/test.go", sdk.Private, time.Now().Add(60*time.Second))
	if err != nil {
	        return err
	}

func (b *Bucket) PutSsk

func (b *Bucket) PutSsk(object, uploadFile string, acl ACL) (string, error)

以ssk的方式上传object, 返回响应header头的x-sina-serverside-key

func (b *Bucket) PutAcl

func (b *Bucket) PutAcl(object string, acl map[string][]string) error

设置指定object 的acl,当object值为"/"时,设置的是对应bucket的acl, acl格式如下:

acl := map[string][]string{
	"SINA000000000000IMGX": []string{"read"},
	"GRPS000000ANONYMOUSE": []string{"read", "read_acp", "write", "write_acp"},
	}

func (b *Bucket) PutMeta

func (b *Bucket) PutMeta(object string, meta map[striring]string) error

更新一个已经存在的object的附加meta信息,这个接口无法更新文件的基本信息,如文件的大小和类型等,meta格式如下:

meta := map[string]string{"x-amz-meta-name": "sandbox", "x-amz-meta-age": "13"}

func (b *Bucket) Copy

func (b *Bucket) Copy(dstObject, srcBucket, srcObject string) error

过拷贝方式创建object(不上传具体的文件内容,而是通过COPY方式对系统内另一文件进行复制)

func (b *Bucket) Relax

func (b *Bucket) Relax(object, uploadFile string, acl ACL) error

通过“秒传”方式创建Object(不上传具体的文件内容,而是通过SHA-1值对系统内文件进行复制)

func (b *Bucket) Del

func (b *Bucket) Del(object string) error

删除object

func (b *Bucket) SignURL

func (b *Bucket) SignURL(object string, expires time.Time) string

返回带有过期时间的下载签名URL

示例:

	uri := bt.SignURL("test.go", time.Now().Add(15*time.Second))
    fmt.Println(uri)
 
	//output: http://url/bucket/test.go?Expires=1479722790&KID=sina%2Cruikuntest&ssig=T233ytgAOv

func (b *Bucket) URL

func (b *Bucket) URL(object string) string

返回URL

MULTIPART UPLOAD

type Multi struct {
    Bucket   *Bucket
    Object   string
    UploadId string
}

func (b *Bucket) InitMulti

func (b *Bucket) InitMulti(object string) (*Multi, error)

大文件分片上传初始化,返回Multi类

注意:在初始化上传接口中要求必须进行用户认证,匿名用户无法使用该接口

在初始化上传时需要给定文件上传所需要的meta绑定信息,在后续的上传中该信息将被保留,并在最终完成时写入云存储系统

func (m *Multi) PutPart

func (m *Multi) PutPart(uploadFile string, acl ACL, partSize int) ([]Part, error)

上传分片, 注意:分片数不能超过2048

func (m *Multi) ListPart

func (m *Multi) ListPart() ([]Part, error)

列出已经上传的所有分片信息

func (m *Multi) Complete

func (m *Multi) Complete(partInfo []Part) error

大文件分片上传拼接(合并)

示例:

	multi, err := bt.InitMulti("pict.tar.gz")
	if err != nil {
		return err
	}
	partInfo, err := multi.PutPart("/tmp/pict.tar.gz", sdk.Private, 1024*1024*3)
	if err != nil {
		return err
	}
	listPart, err := multi.ListPart()
	if err != nil {
		return err
	}
	for k, v := range listPart {
		if partInfo[k].ETag != v.ETag {
            return fmt.Errorf("分片不匹配")
		}
	}
	err = multi.Complete(listPart)
	if err != nil {
		return err
	}

ERROR OPERATION

type Error struct {
    StatusCode int
    RequestId  string
    ErrorCode  string
    Date       string
}

func (e *Error) Error

func (e *Error) Error() string