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datastore_azure.go
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datastore_azure.go
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// Copyright(c) 2017-2018 Zededa, Inc.
// All rights reserved.
package zedUpload
import (
"bytes"
"fmt"
"net"
"net/url"
"time"
"github.com/lf-edge/eve/libs/nettrace"
azure "github.com/lf-edge/eve/libs/zedUpload/azureutil"
"github.com/lf-edge/eve/libs/zedUpload/types"
)
// Action : execute selected action targeting Azure datastore.
func (ep *AzureTransportMethod) Action(req *DronaRequest) error {
var err error
var size int
var loc string
var list []string
var contentLength int64
var remoteFileMD5 string
switch req.operation {
case SyncOpDownload:
err = ep.processAzureDownload(req)
case SyncOpUpload:
loc, err = ep.processAzureUpload(req)
req.objloc = loc
case SyncOpDelete:
err = ep.processAzureBlobDelete(req)
case SyncOpList:
list, err, size = ep.processAzureBlobList(req)
req.imgList = list
case SyncOpGetObjectMetaData:
contentLength, remoteFileMD5, err = ep.processAzureBlobMetaData(req)
req.contentLength = contentLength
req.remoteFileMD5 = remoteFileMD5
case SysOpPutPart:
err = ep.processAzureUploadByChunks(req)
case SysOpCompleteParts:
err = ep.processPutBlockListIntoBlob(req)
case SyncOpGetURI:
sasURI, err := ep.processGenerateBlobSasURI(req)
if err == nil {
req.SasURI = sasURI
}
case SysOpDownloadByChunks:
err = ep.processAzureDownloadByChunks(req)
default:
err = fmt.Errorf("Unknown Azure Blob datastore operation")
}
req.asize = int64(size)
if err != nil {
req.status = fmt.Sprintf("%v", err)
}
return err
}
func (ep *AzureTransportMethod) Open() error {
return nil
}
func (ep *AzureTransportMethod) Close() error {
return ep.hClientWrap.close()
}
// WithSrcIP : use the specific IP as source address for this connection.
func (ep *AzureTransportMethod) WithSrcIP(localAddr net.IP) error {
return ep.hClientWrap.withSrcIP(localAddr)
}
// WithProxy : connect via the provided proxy URL.
func (ep *AzureTransportMethod) WithProxy(proxy *url.URL) error {
return ep.hClientWrap.withProxy(proxy)
}
// WithTrustedCerts : run requests with these certificates added as trusted.
func (ep *AzureTransportMethod) WithTrustedCerts(certs [][]byte) error {
return ep.hClientWrap.withTrustedCerts(certs)
}
// WithBindIntf : bind to specific interface for this connection
func (ep *AzureTransportMethod) WithBindIntf(intf string) error {
return ep.hClientWrap.withBindIntf(intf)
}
// WithLogging enables or disables logging.
func (ep *AzureTransportMethod) WithLogging(onoff bool) error {
return nil
}
// WithNetTracing enables network tracing.
func (ep *AzureTransportMethod) WithNetTracing(opts ...nettrace.TraceOpt) error {
return ep.hClientWrap.withNetTracing(opts...)
}
// GetNetTrace returns collected network trace and packet captures.
func (ep *AzureTransportMethod) GetNetTrace(description string) (
nettrace.AnyNetTrace, []nettrace.PacketCapture, error) {
return ep.hClientWrap.getNetTrace(description)
}
// File upload to Azure Blob Datastore
func (ep *AzureTransportMethod) processAzureUpload(req *DronaRequest) (string, error) {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return "", err
}
file := req.name
loc, err := azure.UploadAzureBlob(ep.aurl, ep.acName, ep.acKey, ep.container, file, req.objloc, hClient)
if err != nil {
return loc, err
}
return loc, nil
}
// File download from Azure Blob Datastore
func (ep *AzureTransportMethod) processAzureDownload(req *DronaRequest) error {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return err
}
file := req.name
prgChan := make(types.StatsNotifChan)
defer close(prgChan)
if req.ackback {
go statsUpdater(req, ep.ctx, prgChan)
}
doneParts, err := azure.DownloadAzureBlob(ep.aurl, ep.acName, ep.acKey, ep.container,
file, req.objloc, req.sizelimit, hClient, req.doneParts, prgChan)
req.doneParts = doneParts
if err != nil {
return err
}
return nil
}
// File delete from Azure Blob Datastore
func (ep *AzureTransportMethod) processAzureBlobDelete(req *DronaRequest) error {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return err
}
err = azure.DeleteAzureBlob(ep.aurl, ep.acName, ep.acKey, ep.container, req.name, hClient)
//log.Printf("Azure Blob delete status: %v", status)
return err
}
// File list from Azure Blob Datastore
func (ep *AzureTransportMethod) processAzureBlobList(req *DronaRequest) ([]string, error, int) {
var csize int
var img []string
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return img, err, csize
}
img, err = azure.ListAzureBlob(ep.aurl, ep.acName, ep.acKey, ep.container, hClient)
if err != nil {
return img, err, csize
}
return img, nil, csize
}
func (ep *AzureTransportMethod) processAzureBlobMetaData(req *DronaRequest) (int64, string, error) {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return 0, "", err
}
size, md5, err := azure.GetAzureBlobMetaData(ep.aurl, ep.acName, ep.acKey, ep.container, req.name, hClient)
if err != nil {
return 0, "", err
}
return size, md5, nil
}
func (ep *AzureTransportMethod) getContext() *DronaCtx {
return ep.ctx
}
func (ep *AzureTransportMethod) processAzureUploadByChunks(req *DronaRequest) error {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return err
}
return azure.UploadPartByChunk(ep.aurl, ep.acName, ep.acKey, ep.container,
req.localName, req.UploadID, hClient, bytes.NewReader(req.Adata))
}
func (ep *AzureTransportMethod) processAzureDownloadByChunks(req *DronaRequest) error {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return err
}
readCloser, size, err := azure.DownloadAzureBlobByChunks(ep.aurl, ep.acName, ep.acKey,
ep.container, req.name, req.objloc, hClient)
if err != nil {
return err
}
req.chunkInfoChan = make(chan ChunkData, 1)
chunkChan := make(chan ChunkData)
go func(chunkChan chan ChunkData) {
for chunkData := range chunkChan {
ep.ctx.postChunk(req, chunkData)
}
}(chunkChan)
return processChunkByChunk(readCloser, size, chunkChan)
}
func (ep *AzureTransportMethod) processGenerateBlobSasURI(req *DronaRequest) (string, error) {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return "", err
}
return azure.GenerateBlobSasURI(ep.aurl, ep.acName, ep.acKey, ep.container,
req.localName, hClient, req.Duration)
}
func (ep *AzureTransportMethod) processPutBlockListIntoBlob(req *DronaRequest) error {
hClient, err := ep.hClientWrap.unwrap()
if err != nil {
return err
}
return azure.UploadBlockListToBlob(ep.aurl, ep.acName, ep.acKey, ep.container,
req.localName, hClient, req.Blocks)
}
func (ep *AzureTransportMethod) NewRequest(opType SyncOpType, objname, objloc string, sizelimit int64, ackback bool, reply chan *DronaRequest) *DronaRequest {
dR := &DronaRequest{}
dR.syncEp = ep
dR.operation = opType
dR.name = objname
dR.ackback = ackback
// FIXME:...we need this later
dR.localName = objname
dR.objloc = objloc
// limit for this download
dR.sizelimit = sizelimit
dR.result = reply
return dR
}
type AzureTransportMethod struct {
transport SyncTransportType
aurl string
container string
//Auth
authType string
acName string
acKey string
failPostTime time.Time
ctx *DronaCtx
hClientWrap *httpClientWrapper
}