Attachment

class flask_attachments.Attachment

Bases: object

Represents a file on the filesystem or stored in the attachment database

Attributes Summary

cached_at	When this file was written to disk
cached_filepath	The path to the file in the cache (on disk)
compressed_size	Content length in compressed form, uses the length of the contents in the database.
compression	The compression algorithm used
content_length	The length of the file in bytes, uncompressed
content_type	The MIME type of the file
contents	The compressed file contents
created	When this attachment was created (in the database)
digest	The hash digest of the file
digest_algorithm	The hash digest algorithm used
download_link	Url for downloading the file
etag	The entity tag which will uniquely correspond to this file
extension	The presumed extension for this file
filename	The name used for display and download of the attachment
id	Primary key (a UUID)
link	Url for serving the file
mimetype	The MIME type for this file, possibly inferred
size	Content length, but prefers the size of the file on disk if available
updated	When this attachment record was last updated

Methods Summary

data(data[, compression, digest_algorithm])	Load a file from bytes into this attachment
from_file(file[, content_type, compression, ...])	Create a new attachment by reading a file from disk
receive(file)	Receive an uploaded file, compressing and saving it as appropritate
send([as_download])	Send this attachment as a file to the client
streamed(stream[, compression, ...])	Stream a file from bytes into this attachment
warm()	Ensure that the file exists in the cache.

Attributes Documentation

cached_at

When this file was written to disk

cached_filepath

The path to the file in the cache (on disk)

compressed_size

Content length in compressed form, uses the length of the contents in the database.

compression: Mapped[CompressionAlgorithm] = <sqlalchemy.orm.properties.MappedColumn object>

The compression algorithm used

content_length: Mapped[int] = <sqlalchemy.orm.properties.MappedColumn object>

The length of the file in bytes, uncompressed

content_type: Mapped[str] = <sqlalchemy.orm.properties.MappedColumn object>

The MIME type of the file

contents: Mapped[bytes] = <MappedSQLExpression at 0x7fb7edeba470; no key>

The compressed file contents

created: Mapped[datetime] = <sqlalchemy.orm.properties.MappedColumn object>

When this attachment was created (in the database)

digest: Mapped[str] = <sqlalchemy.orm.properties.MappedColumn object>

The hash digest of the file

digest_algorithm: Mapped[str] = <sqlalchemy.orm.properties.MappedColumn object>

The hash digest algorithm used

download_link

Url for downloading the file

etag

The entity tag which will uniquely correspond to this file

extension

The presumed extension for this file

filename: Mapped[str] = <sqlalchemy.orm.properties.MappedColumn object>

The name used for display and download of the attachment

id: Mapped[UUID] = <sqlalchemy.orm.properties.MappedColumn object>

Primary key (a UUID)

link

Url for serving the file

mimetype

The MIME type for this file, possibly inferred

size

Content length, but prefers the size of the file on disk if available

updated: Mapped[datetime] = <sqlalchemy.orm.properties.MappedColumn object>

When this attachment record was last updated

Methods Documentation

data(data: bytes, compression: CompressionAlgorithm | str | None = None, digest_algorithm: str | None = None) → None

Load a file from bytes into this attachment

classmethod from_file(file: str | PathLike[str], content_type: str | None = None, compression: CompressionAlgorithm | str | None = None, digest_algorithm: str | None = None) → Attachment

Create a new attachment by reading a file from disk

receive(file: FileStorage) → None

Receive an uploaded file, compressing and saving it as appropritate

send(as_download: bool = False) → Response

Send this attachment as a file to the client

streamed(stream: IO[bytes], compression: CompressionAlgorithm | str | None = None, digest_algorithm: str | None = None, chunk_size: int = 16384) → None

Stream a file from bytes into this attachment

warm() → None

Ensure that the file exists in the cache.