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package blobs
import (
"context"
"fmt"
"net/http"
"strconv"
"strings"
"github.com/Azure/go-autorest/autorest"
"github.com/Azure/go-autorest/autorest/azure"
"github.com/Azure/go-autorest/autorest/validation"
"github.com/tombuildsstuff/giovanni/storage/internal/endpoints"
)
type GetPageRangesInput struct {
LeaseID *string
StartByte *int64
EndByte *int64
}
type GetPageRangesResult struct {
autorest.Response
// The size of the blob in bytes
ContentLength *int64
// The Content Type of the blob
ContentType string
// The ETag associated with this blob
ETag string
PageRanges []PageRange `xml:"PageRange"`
}
type PageRange struct {
// The start byte offset for this range, inclusive
Start int64 `xml:"Start"`
// The end byte offset for this range, inclusive
End int64 `xml:"End"`
}
// GetPageRanges returns the list of valid page ranges for a page blob or snapshot of a page blob.
func (client Client) GetPageRanges(ctx context.Context, accountName, containerName, blobName string, input GetPageRangesInput) (result GetPageRangesResult, err error) {
if accountName == "" {
return result, validation.NewError("blobs.Client", "GetPageRanges", "`accountName` cannot be an empty string.")
}
if containerName == "" {
return result, validation.NewError("blobs.Client", "GetPageRanges", "`containerName` cannot be an empty string.")
}
if strings.ToLower(containerName) != containerName {
return result, validation.NewError("blobs.Client", "GetPageRanges", "`containerName` must be a lower-cased string.")
}
if blobName == "" {
return result, validation.NewError("blobs.Client", "GetPageRanges", "`blobName` cannot be an empty string.")
}
if (input.StartByte != nil && input.EndByte == nil) || input.StartByte == nil && input.EndByte != nil {
return result, validation.NewError("blobs.Client", "GetPageRanges", "`input.StartByte` and `input.EndByte` must both be specified, or both be nil.")
}
req, err := client.GetPageRangesPreparer(ctx, accountName, containerName, blobName, input)
if err != nil {
err = autorest.NewErrorWithError(err, "blobs.Client", "GetPageRanges", nil, "Failure preparing request")
return
}
resp, err := client.GetPageRangesSender(req)
if err != nil {
result.Response = autorest.Response{Response: resp}
err = autorest.NewErrorWithError(err, "blobs.Client", "GetPageRanges", resp, "Failure sending request")
return
}
result, err = client.GetPageRangesResponder(resp)
if err != nil {
err = autorest.NewErrorWithError(err, "blobs.Client", "GetPageRanges", resp, "Failure responding to request")
return
}
return
}
// GetPageRangesPreparer prepares the GetPageRanges request.
func (client Client) GetPageRangesPreparer(ctx context.Context, accountName, containerName, blobName string, input GetPageRangesInput) (*http.Request, error) {
pathParameters := map[string]interface{}{
"containerName": autorest.Encode("path", containerName),
"blobName": autorest.Encode("path", blobName),
}
queryParameters := map[string]interface{}{
"comp": autorest.Encode("query", "pagelist"),
}
headers := map[string]interface{}{
"x-ms-version": APIVersion,
}
if input.LeaseID != nil {
headers["x-ms-lease-id"] = *input.LeaseID
}
if input.StartByte != nil && input.EndByte != nil {
headers["x-ms-range"] = fmt.Sprintf("bytes=%d-%d", *input.StartByte, *input.EndByte)
}
preparer := autorest.CreatePreparer(
autorest.AsGet(),
autorest.WithBaseURL(endpoints.GetBlobEndpoint(client.BaseURI, accountName)),
autorest.WithPathParameters("/{containerName}/{blobName}", pathParameters),
autorest.WithHeaders(headers),
autorest.WithQueryParameters(queryParameters))
return preparer.Prepare((&http.Request{}).WithContext(ctx))
}
// GetPageRangesSender sends the GetPageRanges request. The method will close the
// http.Response Body if it receives an error.
func (client Client) GetPageRangesSender(req *http.Request) (*http.Response, error) {
return autorest.SendWithSender(client, req,
azure.DoRetryWithRegistration(client.Client))
}
// GetPageRangesResponder handles the response to the GetPageRanges request. The method always
// closes the http.Response Body.
func (client Client) GetPageRangesResponder(resp *http.Response) (result GetPageRangesResult, err error) {
if resp != nil && resp.Header != nil {
result.ContentType = resp.Header.Get("Content-Type")
result.ETag = resp.Header.Get("ETag")
if v := resp.Header.Get("x-ms-blob-content-length"); v != "" {
i, innerErr := strconv.Atoi(v)
if innerErr != nil {
err = fmt.Errorf("Error parsing %q as an integer: %s", v, innerErr)
return
}
i64 := int64(i)
result.ContentLength = &i64
}
}
err = autorest.Respond(
resp,
client.ByInspecting(),
azure.WithErrorUnlessStatusCode(http.StatusOK),
autorest.ByUnmarshallingXML(&result),
autorest.ByClosing())
result.Response = autorest.Response{Response: resp}
return
}
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