Add depot, attendant, jetfire, optimus, ota services with kustomize overlays

services/ota_update_go/utils/reader.go

@@ -0,0 +1,62 @@
+package utils
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/url"
+
+	"github.com/fiskerinc/cloud-services/pkg/remotefileupload"
+	"github.com/Azure/azure-storage-blob-go/azblob"
+	"github.com/pkg/errors"
+)
+
+func ReadAzureBlob(azureContainer string, vin string, year, month, day int, offset, count int64, readDirection Direction) ([]byte, int64, error) {
+	creds, err := AzureStorageCredential()
+	if err != nil {
+		return nil, -1, err
+	}
+
+	link, err := remotefileupload.AzureFilePathLink(AzureAccount, azureContainer, vin, fmt.Sprintf("%04d", year), fmt.Sprintf("%02d", month), fmt.Sprintf("%02d", day), ReadFileName)
+	if err != nil {
+		return nil, 0, err
+	}
+	u, err := url.Parse(link)
+	if err != nil {
+		return nil, -1, errors.WithStack(err)
+	}
+
+	url := azblob.NewBlobURL(*u, azblob.NewPipeline(creds, azblob.PipelineOptions{Retry: azblob.RetryOptions{MaxTries: 100}}))
+
+	prop, err := url.GetProperties(context.Background(), azblob.BlobAccessConditions{}, azblob.ClientProvidedKeyOptions{})
+	if err != nil {
+		return nil, -1, err
+	}
+	if offset >= prop.ContentLength() {
+		return nil, -1, errors.New("offset out of range")
+	}
+	//count from the end of the blob
+	readOffset := prop.ContentLength() - offset
+
+	begin := readOffset
+	if readDirection == Up {
+		begin -= count
+	}
+	//just read the rest
+	if begin <= 0 {
+		begin = 0
+		count = readOffset
+	}
+	if count == 0 {
+		count = azblob.CountToEnd
+	}
+	reader, err := url.Download(context.Background(), begin, count,
+		azblob.BlobAccessConditions{}, false, azblob.ClientProvidedKeyOptions{})
+	if err != nil {
+		return nil, -1, err
+	}
+	buf := make([]byte, reader.ContentLength())
+
+	_, err = io.ReadAtLeast(reader.Body(azblob.RetryReaderOptions{}), buf, len(buf))
+	return buf, prop.ContentLength(), err
+}