This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
[FunctionName("DownloadFile")] | |
public static IActionResult Run( | |
[HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "download/{fileId}")] HttpRequest req, | |
string fileId, | |
[Table("metadata", "{fileId}", "{fileId}", Connection = "TableConnectionString")] FileMetadata fileMetadata, | |
[Table("ocrdata", Connection = "TableConnectionString")] CloudTable fileOcrDataTable, | |
[Blob("files/{fileId}", FileAccess.Read, Connection = "StorageAccountConnectionString")] CloudBlockBlob fileBlob, | |
ILogger log) | |
{ | |
if (!fileMetadata.ApprovedForDownload) | |
{ | |
return new StatusCodeResult(403); | |
} | |
var readQuery = new TableQuery<OcrResult>(); | |
TableQuery.GenerateFilterCondition(nameof(OcrResult.PartitionKey), QueryComparisons.Equal, fileId); | |
var ocrResults = fileOcrDataTable.ExecuteQuery(readQuery).ToList(); | |
return new OkObjectResult(new DownloadResponse | |
{ | |
Metadata = ocrResults, | |
FileId = fileId, | |
DownloadUrl = GenerateSasUrlForFileDownload(fileBlob, fileId) | |
}); | |
} | |
static string GenerateSasUrlForFileDownload(CloudBlockBlob blob, string fileId) | |
{ | |
var policy = new SharedAccessBlobPolicy() | |
{ | |
SharedAccessExpiryTime = DateTime.Now.AddHours(1), | |
Permissions = SharedAccessBlobPermissions.Read | |
}; | |
return blob.Uri + blob.GetSharedAccessSignature(policy); | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment