160 строки
8.7 KiB
Go
160 строки
8.7 KiB
Go
package azblob
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import (
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"context"
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"io"
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"net/url"
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"github.com/Azure/azure-pipeline-go/pipeline"
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)
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const (
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// BlockBlobMaxUploadBlobBytes indicates the maximum number of bytes that can be sent in a call to Upload.
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BlockBlobMaxUploadBlobBytes = 256 * 1024 * 1024 // 256MB
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// BlockBlobMaxStageBlockBytes indicates the maximum number of bytes that can be sent in a call to StageBlock.
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BlockBlobMaxStageBlockBytes = 4000 * 1024 * 1024 // 4000MiB
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// BlockBlobMaxBlocks indicates the maximum number of blocks allowed in a block blob.
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BlockBlobMaxBlocks = 50000
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)
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// BlockBlobURL defines a set of operations applicable to block blobs.
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type BlockBlobURL struct {
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BlobURL
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bbClient blockBlobClient
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}
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// NewBlockBlobURL creates a BlockBlobURL object using the specified URL and request policy pipeline.
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func NewBlockBlobURL(url url.URL, p pipeline.Pipeline) BlockBlobURL {
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blobClient := newBlobClient(url, p)
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bbClient := newBlockBlobClient(url, p)
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return BlockBlobURL{BlobURL: BlobURL{blobClient: blobClient}, bbClient: bbClient}
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}
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// WithPipeline creates a new BlockBlobURL object identical to the source but with the specific request policy pipeline.
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func (bb BlockBlobURL) WithPipeline(p pipeline.Pipeline) BlockBlobURL {
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return NewBlockBlobURL(bb.blobClient.URL(), p)
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}
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// WithSnapshot creates a new BlockBlobURL object identical to the source but with the specified snapshot timestamp.
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// Pass "" to remove the snapshot returning a URL to the base blob.
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func (bb BlockBlobURL) WithSnapshot(snapshot string) BlockBlobURL {
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p := NewBlobURLParts(bb.URL())
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p.Snapshot = snapshot
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return NewBlockBlobURL(p.URL(), bb.blobClient.Pipeline())
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}
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// WithVersionID creates a new BlockBlobURRL object identical to the source but with the specified version id.
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// Pass "" to remove the snapshot returning a URL to the base blob.
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func (bb BlockBlobURL) WithVersionID(versionId string) BlockBlobURL {
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p := NewBlobURLParts(bb.URL())
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p.VersionID = versionId
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return NewBlockBlobURL(p.URL(), bb.blobClient.Pipeline())
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}
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func (bb BlockBlobURL) GetAccountInfo(ctx context.Context) (*BlobGetAccountInfoResponse, error) {
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return bb.blobClient.GetAccountInfo(ctx)
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}
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// Upload creates a new block blob or overwrites an existing block blob.
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// Updating an existing block blob overwrites any existing metadata on the blob. Partial updates are not
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// supported with Upload; the content of the existing blob is overwritten with the new content. To
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// perform a partial update of a block blob, use StageBlock and CommitBlockList.
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// This method panics if the stream is not at position 0.
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// Note that the http client closes the body stream after the request is sent to the service.
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// For more information, see https://docs.microsoft.com/rest/api/storageservices/put-blob.
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func (bb BlockBlobURL) Upload(ctx context.Context, body io.ReadSeeker, h BlobHTTPHeaders, metadata Metadata, ac BlobAccessConditions, tier AccessTierType, blobTagsMap BlobTagsMap, cpk ClientProvidedKeyOptions) (*BlockBlobUploadResponse, error) {
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ifModifiedSince, ifUnmodifiedSince, ifMatchETag, ifNoneMatchETag := ac.ModifiedAccessConditions.pointers()
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count, err := validateSeekableStreamAt0AndGetCount(body)
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blobTagsString := SerializeBlobTagsHeader(blobTagsMap)
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if err != nil {
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return nil, err
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}
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return bb.bbClient.Upload(ctx, body, count, nil, nil,
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&h.ContentType, &h.ContentEncoding, &h.ContentLanguage, h.ContentMD5,
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&h.CacheControl, metadata, ac.LeaseAccessConditions.pointers(), &h.ContentDisposition,
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cpk.EncryptionKey, cpk.EncryptionKeySha256, cpk.EncryptionAlgorithm, // CPK-V
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cpk.EncryptionScope, // CPK-N
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tier, ifModifiedSince, ifUnmodifiedSince, ifMatchETag, ifNoneMatchETag,
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nil, // Blob ifTags
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nil,
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blobTagsString, // Blob tags
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)
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}
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// StageBlock uploads the specified block to the block blob's "staging area" to be later committed by a call to CommitBlockList.
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// Note that the http client closes the body stream after the request is sent to the service.
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// For more information, see https://docs.microsoft.com/rest/api/storageservices/put-block.
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func (bb BlockBlobURL) StageBlock(ctx context.Context, base64BlockID string, body io.ReadSeeker, ac LeaseAccessConditions, transactionalMD5 []byte, cpk ClientProvidedKeyOptions) (*BlockBlobStageBlockResponse, error) {
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count, err := validateSeekableStreamAt0AndGetCount(body)
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if err != nil {
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return nil, err
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}
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return bb.bbClient.StageBlock(ctx, base64BlockID, count, body, transactionalMD5, nil, nil, ac.pointers(),
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cpk.EncryptionKey, cpk.EncryptionKeySha256, cpk.EncryptionAlgorithm, // CPK-V
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cpk.EncryptionScope, // CPK-N
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nil)
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}
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// StageBlockFromURL copies the specified block from a source URL to the block blob's "staging area" to be later committed by a call to CommitBlockList.
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// If count is CountToEnd (0), then data is read from specified offset to the end.
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// For more information, see https://docs.microsoft.com/en-us/rest/api/storageservices/put-block-from-url.
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func (bb BlockBlobURL) StageBlockFromURL(ctx context.Context, base64BlockID string, sourceURL url.URL, offset int64, count int64, destinationAccessConditions LeaseAccessConditions, sourceAccessConditions ModifiedAccessConditions, cpk ClientProvidedKeyOptions) (*BlockBlobStageBlockFromURLResponse, error) {
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sourceIfModifiedSince, sourceIfUnmodifiedSince, sourceIfMatchETag, sourceIfNoneMatchETag := sourceAccessConditions.pointers()
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return bb.bbClient.StageBlockFromURL(ctx, base64BlockID, 0, sourceURL.String(), httpRange{offset: offset, count: count}.pointers(), nil, nil, nil,
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cpk.EncryptionKey, cpk.EncryptionKeySha256, cpk.EncryptionAlgorithm, // CPK
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cpk.EncryptionScope, // CPK-N
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destinationAccessConditions.pointers(), sourceIfModifiedSince, sourceIfUnmodifiedSince, sourceIfMatchETag, sourceIfNoneMatchETag, nil)
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}
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// CommitBlockList writes a blob by specifying the list of block IDs that make up the blob.
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// In order to be written as part of a blob, a block must have been successfully written
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// to the server in a prior PutBlock operation. You can call PutBlockList to update a blob
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// by uploading only those blocks that have changed, then committing the new and existing
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// blocks together. Any blocks not specified in the block list and permanently deleted.
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// For more information, see https://docs.microsoft.com/rest/api/storageservices/put-block-list.
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func (bb BlockBlobURL) CommitBlockList(ctx context.Context, base64BlockIDs []string, h BlobHTTPHeaders, metadata Metadata, ac BlobAccessConditions, tier AccessTierType, blobTagsMap BlobTagsMap, cpk ClientProvidedKeyOptions) (*BlockBlobCommitBlockListResponse, error) {
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ifModifiedSince, ifUnmodifiedSince, ifMatchETag, ifNoneMatchETag := ac.ModifiedAccessConditions.pointers()
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blobTagsString := SerializeBlobTagsHeader(blobTagsMap)
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return bb.bbClient.CommitBlockList(ctx, BlockLookupList{Latest: base64BlockIDs}, nil,
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&h.CacheControl, &h.ContentType, &h.ContentEncoding, &h.ContentLanguage, h.ContentMD5, nil, nil,
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metadata, ac.LeaseAccessConditions.pointers(), &h.ContentDisposition,
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cpk.EncryptionKey, cpk.EncryptionKeySha256, cpk.EncryptionAlgorithm, // CPK
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cpk.EncryptionScope, // CPK-N
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tier,
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ifModifiedSince, ifUnmodifiedSince, ifMatchETag, ifNoneMatchETag,
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nil, // Blob ifTags
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nil,
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blobTagsString, // Blob tags
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)
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}
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// GetBlockList returns the list of blocks that have been uploaded as part of a block blob using the specified block list filter.
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// For more information, see https://docs.microsoft.com/rest/api/storageservices/get-block-list.
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func (bb BlockBlobURL) GetBlockList(ctx context.Context, listType BlockListType, ac LeaseAccessConditions) (*BlockList, error) {
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return bb.bbClient.GetBlockList(ctx, listType, nil, nil, ac.pointers(),
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nil, // Blob ifTags
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nil)
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}
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// CopyFromURL synchronously copies the data at the source URL to a block blob, with sizes up to 256 MB.
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// For more information, see https://docs.microsoft.com/en-us/rest/api/storageservices/copy-blob-from-url.
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func (bb BlockBlobURL) CopyFromURL(ctx context.Context, source url.URL, metadata Metadata, srcac ModifiedAccessConditions, dstac BlobAccessConditions, srcContentMD5 []byte, tier AccessTierType, blobTagsMap BlobTagsMap) (*BlobCopyFromURLResponse, error) {
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srcIfModifiedSince, srcIfUnmodifiedSince, srcIfMatchETag, srcIfNoneMatchETag := srcac.pointers()
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dstIfModifiedSince, dstIfUnmodifiedSince, dstIfMatchETag, dstIfNoneMatchETag := dstac.ModifiedAccessConditions.pointers()
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dstLeaseID := dstac.LeaseAccessConditions.pointers()
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blobTagsString := SerializeBlobTagsHeader(blobTagsMap)
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return bb.blobClient.CopyFromURL(ctx, source.String(), nil, metadata, tier,
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srcIfModifiedSince, srcIfUnmodifiedSince,
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srcIfMatchETag, srcIfNoneMatchETag,
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dstIfModifiedSince, dstIfUnmodifiedSince,
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dstIfMatchETag, dstIfNoneMatchETag,
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nil, // Blob ifTags
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dstLeaseID, nil, srcContentMD5,
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blobTagsString, // Blob tags
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nil, // seal Blob
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)
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}
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