File Handling

Enfyra supports request file uploads, storage-backed file records, metadata updates, and file deletion through dynamic script helpers.

Uploaded File Context

Multipart requests expose the uploaded request file as $ctx.$uploadedFile or @UPLOADED_FILE.

const file = @UPLOADED_FILE;

if (!file) {
  @THROW400("File is required");
}

return {
  originalname: file.originalname,
  mimetype: file.mimetype,
  size: file.size,
  fieldname: file.fieldname,
};

Available properties:

Property	Type	Description
originalname	string	Filename sent by the client
mimetype	string	Client-provided MIME type
encoding	string	Form upload encoding
path	string	Server temp-file path used internally by Enfyra helpers
size	number	File size in bytes
fieldname	string	Multipart field name, usually file

Do not read @UPLOADED_FILE.path into a Buffer in script code. For normal request uploads, pass the file object directly to @STORAGE.$upload or @STORAGE.$update so Enfyra streams from disk to the selected storage backend.

Upload Files

Use $ctx.$storage.$upload or @STORAGE.$upload to upload a file to storage and create a file_definition record.

Upload The Request File

if (!@UPLOADED_FILE) {
  @THROW400("File is required");
}

const saved = await @STORAGE.$upload({
  file: @UPLOADED_FILE,
  storageConfig: @BODY.storageConfig,
  folder: @BODY.folder,
  title: @BODY.title,
  description: @BODY.description,
});

return saved;

This path is streaming-safe. Enfyra writes the multipart upload to a temp file, then $storage.$upload({ file }) opens a Readable stream from that temp file. The full file is not buffered into RAM.

Upload A Generated Or Processed File

Use buffer only when the script itself creates or transforms a small file, such as an image thumbnail.

const pngBuffer = await makeThumbnail();

const saved = await @STORAGE.$upload({
  filename: "thumbnail.png",
  mimetype: "image/png",
  buffer: pngBuffer,
  size: pngBuffer.length,
  description: "Generated thumbnail",
});

return saved;

Do not use the buffer form for large request uploads or database backups. For large files, use the file: @UPLOADED_FILE form.

Upload Options

Option	Type	Required	Description
file	@UPLOADED_FILE object	Required for request uploads	Streams the request upload from Enfyra's temp file
buffer	Buffer	Required for generated-file uploads	In-memory bytes for small generated or transformed files
filename / originalname	string	Required for buffer uploads	Filename to store
mimetype	string	Required for buffer uploads	MIME type to store
size	number	Optional	Defaults to request file size or buffer length
folder	number \| { id: number }	No	Folder relation
storageConfig	number \| { id: number }	No	Storage configuration relation
title	string	No	File title
description	string	No	File description

Pass either file or buffer, never both.

Update Files

Use $ctx.$storage.$update or @STORAGE.$update.

Replace With The Request File

if (!@UPLOADED_FILE) {
  @THROW400("File is required");
}

const updated = await @STORAGE.$update(@PARAMS.fileId, {
  file: @UPLOADED_FILE,
  title: @BODY.title,
  description: @BODY.description,
});

return updated;

Metadata-Only Update

const updated = await @STORAGE.$update(@PARAMS.fileId, {
  title: @BODY.title,
  description: @BODY.description,
  folder: @BODY.folder,
});

return updated;

Changing storageConfig requires replacing the blob in the same request. Metadata-only storage moves are rejected because Enfyra cannot point a record at a backend that does not contain the object.

Delete Files

await @STORAGE.$delete(@PARAMS.fileId);

return { success: true };

Deletion removes the file_definition record and the physical object from the configured storage backend.

Validation Pattern

Validate type and size before saving:

const file = @UPLOADED_FILE;

if (!file) {
  @THROW400("File is required");
}

const allowed = ["image/jpeg", "image/png", "application/pdf"];
if (!allowed.includes(file.mimetype)) {
  @THROW400("Unsupported file type");
}

const maxBytes = 20 * 1024 * 1024;
if (file.size > maxBytes) {
  @THROW400("File is too large");
}

return await @STORAGE.$upload({
  file,
  folder: @BODY.folder,
  description: @BODY.description,
});

Register Existing Storage Objects

Use @STORAGE.$registerFile when a trusted external process has already uploaded an object to the selected storage backend and the script only needs to create the file_definition record.

return await @STORAGE.$registerFile({
  filename: "backup.sql.gz",
  mimetype: "application/gzip",
  location: @BODY.location,
  size: @BODY.size,
  storageConfig: @BODY.storageConfig,
  description: @BODY.description,
});

Client Request

Send multipart data with field name file. Do not manually set Content-Type; the browser must set the multipart boundary.

const form = new FormData();
form.append("file", file);
form.append("description", description);

const response = await fetch("/api/upload", {
  method: "POST",
  credentials: "include",
  body: form,
});

Storage Behavior

File uploads use one stream contract internally. Request uploads are disk-backed and streamed to Local, S3, Cloudflare R2, or Google Cloud Storage. The buffer helper form exists only for small generated files and is converted to a stream at the helper edge.

Next Steps

• Context Reference for request context fields.
• Error Handling for @THROW patterns.
• Repository Methods for querying file records.