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upload.go
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upload.go
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// Package helpers provides useful wrappers for clients using the lakeFS OpenAPI.
package helpers
import (
"github.com/treeverse/lakefs/pkg/api"
"context"
"fmt"
"io"
"net/url"
)
// ClientUpload uploads contents as a file using client-side ("direct") access to underlying
// storage. It requires credentials both to lakeFS and to underlying storage, but
// considerably reduces the load on the lakeFS server.
func ClientUpload(ctx context.Context, client api.ClientWithResponsesInterface, repoID, branchID, filePath string, metadata map[string]string, contentType string, contents io.ReadSeeker) (*api.ObjectStats, error) {
resp, err := client.GetPhysicalAddressWithResponse(ctx, repoID, branchID, &api.GetPhysicalAddressParams{
Path: filePath,
})
if err != nil {
return nil, fmt.Errorf("get physical address to upload object: %w", err)
}
if resp.JSONDefault != nil {
return nil, fmt.Errorf("%w: %s", ErrRequestFailed, resp.JSONDefault.Message)
}
if resp.JSON200 == nil {
return nil, fmt.Errorf("%w: %s (status code %d)", ErrRequestFailed, resp.Status(), resp.StatusCode())
}
stagingLocation := *resp.JSON200
for { // Return from inside loop
physicalAddress := api.StringValue(stagingLocation.PhysicalAddress)
parsedAddress, err := url.Parse(physicalAddress)
if err != nil {
return nil, fmt.Errorf("parse physical address URL %s: %w", physicalAddress, err)
}
adapter, err := NewAdapter(parsedAddress.Scheme)
if err != nil {
return nil, fmt.Errorf("%s: %w", parsedAddress.Scheme, err)
}
stats, err := adapter.Upload(ctx, parsedAddress, contents)
if err != nil {
return nil, fmt.Errorf("upload to backing store: %w", err)
}
resp, err := client.LinkPhysicalAddressWithResponse(ctx, repoID, branchID, &api.LinkPhysicalAddressParams{
Path: filePath,
}, api.LinkPhysicalAddressJSONRequestBody{
Checksum: stats.ETag,
SizeBytes: stats.Size,
Staging: stagingLocation,
UserMetadata: &api.StagingMetadata_UserMetadata{
AdditionalProperties: metadata,
},
ContentType: &contentType,
})
if err != nil {
return nil, fmt.Errorf("link object to backing store: %w", err)
}
if resp.JSON200 != nil {
return resp.JSON200, nil
}
if resp.JSON409 == nil {
return nil, fmt.Errorf("link object to backing store: %w (status code %d)", ErrRequestFailed, resp.StatusCode())
}
// Try again!
stagingLocation = *resp.JSON409
if _, err = contents.Seek(0, io.SeekStart); err != nil {
return nil, fmt.Errorf("rewind: %w", err)
}
}
}