We are programmatically creating directories and uploading files from another part of our application. The directories and files appear correctly in the ABP File Management module, confirming successful storage However, we are experiencing issues when trying to download these files from abp file management module.
Reference Code: private async Task<FileDescriptor> UploadFileAsync(SiteFile file, Guid directoryId) { if (file == null) throw new UserFriendlyException("Invalid file provided.");
// Convert the byte array to a Base64 string
string fileContentBase64 = Convert.ToBase64String(file.Content);
byte[] fileBytes = Convert.FromBase64String(fileContentBase64);
var fileDescriptor = new FileDescriptor(
id: GuidGenerator.Create(),
name: file.Name,
mimeType: file.MimeType,
directoryId: directoryId,
size: fileBytes.Length,
tenantId : _currentTenant?.Id
);
await _fileDescriptorRepository.InsertAsync(fileDescriptor);
using var stream = new MemoryStream(fileBytes);
await _blobContainer.SaveAsync(fileDescriptor.Id.ToString(), stream);
return fileDescriptor;
}
public class SiteFile : FullAuditedEntity<Guid> {
public Guid Id { get; set; }
public string? planType { get; set; }
public string Name { get; set; }
public string MimeType { get; set; }
public long Size { get; set; }
public byte[] Content { get; set; }
}
3 Answer(s)
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To ensure files uploaded programmatically are downloadable via the ABP File Management module, you must follow the same conventions and requirements as the module itself. Here are the key points and a step-by-step solution:
FileDescriptor Creation: You are correctly creating and saving the
FileDescriptorentity and storing the file in the blob container. However, the File Management module expects certain fields and relationships to be set properly, and the upload process should match the module's logic.Directory and Tenant Consistency: Make sure the
directoryIdyou assign is valid and exists in theDirectoryDescriptortable for the current tenant. If the directory is not found or not associated with the correct tenant, the UI may not display or allow downloads.Blob Storage Key: The blob is saved with
fileDescriptor.Id.ToString(). This is correct, as the module uses the file's GUID as the blob key.Download Token Requirement: The File Management module uses a download token for security. The download process is:
- UI requests a download token for the file.
- UI then calls the download endpoint with the file ID and token.
- The backend validates the token and tenant before serving the file.
Common Issues:
- If the file is not downloadable, check that the
FileDescriptoris correctly linked to the directory and tenant. - Ensure the blob exists in the correct container and with the correct key.
- If you use multi-tenancy, make sure the tenant context is set when saving both the entity and the blob.
- If the file is not downloadable, check that the
Recommended Approach: Instead of manually inserting the
FileDescriptorand saving the blob, use the File Management module's application service (e.g.,FileDescriptorAppService) to upload files. This ensures all business logic, validation, and events are handled.Example (pseudo-code):
// Inject IFileDescriptorAppService var input = new CreateFileInputWithStream { DirectoryId = directoryId, Name = file.Name, MimeType = file.MimeType, Content = new MemoryStream(file.Content) }; await _fileDescriptorAppService.CreateAsync(input);If you must do it manually, double-check all fields and ensure the tenant context is correct.
- Debugging Tips:
- Check the database for the
FileDescriptorandDirectoryDescriptorrecords. - Check the blob storage for the file.
- Review logs for any errors during download.
- Try uploading a file via the UI and compare the database and blob storage entries with your programmatic upload.
- Check the database for the
By following the above steps and using the module's services where possible, you will ensure compatibility with the File Management module's download process.
Sources:
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How can I Check the blob storage for the file.
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hi
However, we are experiencing issues when trying to download these files from abp file management module.
What is the problem? Can you share the exception logs?
You can inject the
FileManagerto create new files.Thanks.
