/// <summary>
/// Uploads inline image attachment from source to target and returns target inline image AttachmentReference Guid.
/// </summary>
/// <param name="inlineImageUrl"></param>
/// <returns></returns>
private async Task <string> UploadInlineImageAttachmentFromSourceWorkItemToTarget(IBatchMigrationContext batchContext, string inlineImageUrl, int sourceWorkItemId, int maxAttachmentSize)
{
Guid sourceGuid = MigrationHelpers.GetAttachmentUrlGuid(inlineImageUrl);
string targetGuid = null;
if (Guid.Empty.Equals(sourceGuid))
{
Logger.LogWarning(LogDestination.File, $"Unexpected format for inline image url {inlineImageUrl} for source work item {sourceWorkItemId}");
ClientHelpers.AddFailureReasonToWorkItemMigrationState(sourceWorkItemId, FailureReason.InlineImageUrlFormatError, batchContext.WorkItemMigrationState);
// just return the null guid since there is nothing we can do with an invalid url
return(null);
}
Stream stream = null;
try
{
Logger.LogTrace(LogDestination.File, $"Reading inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
stream = await WorkItemTrackingHelpers.GetAttachmentAsync(this.context.SourceClient.WorkItemTrackingHttpClient, sourceGuid);
Logger.LogTrace(LogDestination.File, $"Completed reading inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
}
catch (Exception e)
{
Logger.LogError(LogDestination.File, e, $"Unable to download inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
ClientHelpers.AddFailureReasonToWorkItemMigrationState(sourceWorkItemId, FailureReason.InlineImageDownloadError, batchContext.WorkItemMigrationState);
// just return the null guid since there is nothing we can do if we couldn't download the inline image
return(null);
}
if (stream != null)
{
using (MemoryStream memstream = new MemoryStream())
{
bool copiedStream = false;
using (stream)
{
try
{
Logger.LogTrace(LogDestination.File, $"Downloading inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
await ClientHelpers.CopyStreamAsync(stream, memstream);
Logger.LogTrace(LogDestination.File, $"Completed downloading inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
copiedStream = true;
}
catch (Exception e)
{
Logger.LogError(LogDestination.File, e, $"Unable to download inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
ClientHelpers.AddFailureReasonToWorkItemMigrationState(sourceWorkItemId, FailureReason.InlineImageDownloadError, batchContext.WorkItemMigrationState);
}
}
if (memstream.Length > maxAttachmentSize)
{
Logger.LogWarning(LogDestination.File, $"Inline image attachment of source work item with id {sourceWorkItemId} and url {inlineImageUrl} exceeded the maximum attachment size of {maxAttachmentSize} bytes." +
$" Skipping creating the inline image attachment in target account.");
return(null);
}
if (copiedStream)
{
memstream.Position = 0;
//upload the attachment to target
try
{
Logger.LogTrace(LogDestination.File, $"Uploading inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
var aRef = await WorkItemTrackingHelpers.CreateAttachmentChunkedAsync(this.context.TargetClient.WorkItemTrackingHttpClient, this.context.TargetClient.Connection, memstream, this.context.Config.AttachmentUploadChunkSize);
targetGuid = aRef.Id.ToString();
Logger.LogTrace(LogDestination.File, $"Completed uploading inline image {inlineImageUrl} for source work item {sourceWorkItemId} from the source account");
}
catch (Exception e)
{
Logger.LogError(LogDestination.File, e, $"Unable to upload inline image for source work item {sourceWorkItemId} in the target account");
ClientHelpers.AddFailureReasonToWorkItemMigrationState(sourceWorkItemId, FailureReason.InlineImageUploadError, batchContext.WorkItemMigrationState);
}
}
}
}
return(targetGuid);
}