Vendor dependencies for azure backend
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191
vendor/github.com/Azure/azure-sdk-for-go/storage/pageblob.go
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vendored
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191
vendor/github.com/Azure/azure-sdk-for-go/storage/pageblob.go
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package storage
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import (
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"encoding/xml"
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"errors"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"time"
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)
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// GetPageRangesResponse contains the response fields from
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// Get Page Ranges call.
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//
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// See https://msdn.microsoft.com/en-us/library/azure/ee691973.aspx
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type GetPageRangesResponse struct {
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XMLName xml.Name `xml:"PageList"`
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PageList []PageRange `xml:"PageRange"`
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}
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// PageRange contains information about a page of a page blob from
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// Get Pages Range call.
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//
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// See https://msdn.microsoft.com/en-us/library/azure/ee691973.aspx
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type PageRange struct {
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Start int64 `xml:"Start"`
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End int64 `xml:"End"`
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}
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var (
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errBlobCopyAborted = errors.New("storage: blob copy is aborted")
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errBlobCopyIDMismatch = errors.New("storage: blob copy id is a mismatch")
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)
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// PutPageOptions includes the options for a put page operation
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type PutPageOptions struct {
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Timeout uint
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LeaseID string `header:"x-ms-lease-id"`
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IfSequenceNumberLessThanOrEqualTo *int `header:"x-ms-if-sequence-number-le"`
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IfSequenceNumberLessThan *int `header:"x-ms-if-sequence-number-lt"`
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IfSequenceNumberEqualTo *int `header:"x-ms-if-sequence-number-eq"`
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IfModifiedSince *time.Time `header:"If-Modified-Since"`
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IfUnmodifiedSince *time.Time `header:"If-Unmodified-Since"`
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IfMatch string `header:"If-Match"`
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IfNoneMatch string `header:"If-None-Match"`
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RequestID string `header:"x-ms-client-request-id"`
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}
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// WriteRange writes a range of pages to a page blob.
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// Ranges must be aligned with 512-byte boundaries and chunk must be of size
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// multiplies by 512.
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//
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// See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/Put-Page
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func (b *Blob) WriteRange(blobRange BlobRange, bytes io.Reader, options *PutPageOptions) error {
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if bytes == nil {
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return errors.New("bytes cannot be nil")
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}
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return b.modifyRange(blobRange, bytes, options)
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}
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// ClearRange clears the given range in a page blob.
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// Ranges must be aligned with 512-byte boundaries and chunk must be of size
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// multiplies by 512.
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//
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// See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/Put-Page
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func (b *Blob) ClearRange(blobRange BlobRange, options *PutPageOptions) error {
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return b.modifyRange(blobRange, nil, options)
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}
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func (b *Blob) modifyRange(blobRange BlobRange, bytes io.Reader, options *PutPageOptions) error {
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if blobRange.End < blobRange.Start {
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return errors.New("the value for rangeEnd must be greater than or equal to rangeStart")
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}
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if blobRange.Start%512 != 0 {
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return errors.New("the value for rangeStart must be a modulus of 512")
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}
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if blobRange.End%512 != 511 {
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return errors.New("the value for rangeEnd must be a modulus of 511")
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}
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params := url.Values{"comp": {"page"}}
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// default to clear
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write := "clear"
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var cl uint64
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// if bytes is not nil then this is an update operation
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if bytes != nil {
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write = "update"
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cl = (blobRange.End - blobRange.Start) + 1
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}
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headers := b.Container.bsc.client.getStandardHeaders()
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headers["x-ms-blob-type"] = string(BlobTypePage)
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headers["x-ms-page-write"] = write
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headers["x-ms-range"] = blobRange.String()
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headers["Content-Length"] = fmt.Sprintf("%v", cl)
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if options != nil {
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params = addTimeout(params, options.Timeout)
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headers = mergeHeaders(headers, headersFromStruct(*options))
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}
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uri := b.Container.bsc.client.getEndpoint(blobServiceName, b.buildPath(), params)
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resp, err := b.Container.bsc.client.exec(http.MethodPut, uri, headers, bytes, b.Container.bsc.auth)
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if err != nil {
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return err
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}
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readAndCloseBody(resp.body)
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return checkRespCode(resp.statusCode, []int{http.StatusCreated})
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}
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// GetPageRangesOptions includes the options for a get page ranges operation
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type GetPageRangesOptions struct {
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Timeout uint
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Snapshot *time.Time
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PreviousSnapshot *time.Time
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Range *BlobRange
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LeaseID string `header:"x-ms-lease-id"`
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RequestID string `header:"x-ms-client-request-id"`
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}
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// GetPageRanges returns the list of valid page ranges for a page blob.
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//
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// See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/Get-Page-Ranges
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func (b *Blob) GetPageRanges(options *GetPageRangesOptions) (GetPageRangesResponse, error) {
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params := url.Values{"comp": {"pagelist"}}
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headers := b.Container.bsc.client.getStandardHeaders()
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if options != nil {
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params = addTimeout(params, options.Timeout)
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params = addSnapshot(params, options.Snapshot)
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if options.PreviousSnapshot != nil {
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params.Add("prevsnapshot", timeRfc1123Formatted(*options.PreviousSnapshot))
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}
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if options.Range != nil {
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headers["Range"] = options.Range.String()
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}
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headers = mergeHeaders(headers, headersFromStruct(*options))
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}
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uri := b.Container.bsc.client.getEndpoint(blobServiceName, b.buildPath(), params)
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var out GetPageRangesResponse
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resp, err := b.Container.bsc.client.exec(http.MethodGet, uri, headers, nil, b.Container.bsc.auth)
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if err != nil {
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return out, err
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}
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defer resp.body.Close()
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if err = checkRespCode(resp.statusCode, []int{http.StatusOK}); err != nil {
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return out, err
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}
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err = xmlUnmarshal(resp.body, &out)
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return out, err
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}
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// PutPageBlob initializes an empty page blob with specified name and maximum
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// size in bytes (size must be aligned to a 512-byte boundary). A page blob must
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// be created using this method before writing pages.
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//
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// See CreateBlockBlobFromReader for more info on creating blobs.
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//
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// See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/Put-Blob
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func (b *Blob) PutPageBlob(options *PutBlobOptions) error {
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if b.Properties.ContentLength%512 != 0 {
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return errors.New("Content length must be aligned to a 512-byte boundary")
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}
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params := url.Values{}
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headers := b.Container.bsc.client.getStandardHeaders()
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headers["x-ms-blob-type"] = string(BlobTypePage)
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headers["x-ms-blob-content-length"] = fmt.Sprintf("%v", b.Properties.ContentLength)
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headers["x-ms-blob-sequence-number"] = fmt.Sprintf("%v", b.Properties.SequenceNumber)
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headers = mergeHeaders(headers, headersFromStruct(b.Properties))
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headers = b.Container.bsc.client.addMetadataToHeaders(headers, b.Metadata)
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if options != nil {
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params = addTimeout(params, options.Timeout)
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headers = mergeHeaders(headers, headersFromStruct(*options))
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}
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uri := b.Container.bsc.client.getEndpoint(blobServiceName, b.buildPath(), params)
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resp, err := b.Container.bsc.client.exec(http.MethodPut, uri, headers, nil, b.Container.bsc.auth)
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if err != nil {
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return err
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}
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readAndCloseBody(resp.body)
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return checkRespCode(resp.statusCode, []int{http.StatusCreated})
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}
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