Preflight check before upload

options
https://api.box.com/2.0
/files/content

Performs a check to verify that a file will be accepted by Box before you upload the entire file.

Request

application/json

Request Body

stringin bodyoptional
File.mp4

The name for the file

objectin body

The parent folder to upload the file to

stringnulloptional
123

The ID of parent item

integer / int32in bodyoptional
1024

The size of the file in bytes

Response

application/jsonUpload URL

If the check passed, the response will include a session URL that can be used to upload the file to.

application/jsonConflict error

If the check did not pass, the response will include some details on why it did not pass.

application/jsonClient error

An unexpected client error.

options
Preflight check before upload
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Request Example

cURL
curl -X OPTIONS https://api.box.com/2.0/files/content \
     -H 'Authorization: Bearer <ACCESS_TOKEN>'
     -H "Content-Type: multipart/form-data" \
     -F attributes='{"name":"Photo.jpg", "parent":{"id":"11446498"}}'
Java
String fileName = "My Doc.pdf";
BoxFolder rootFolder = BoxFolder.getRootFolder(api);
try {
    folder.canUpload(fileName, 98734576);

    // If the file upload would not have succeeded, it will not be attempted
    folder.uploadFile(fileContents, fileName);
} catch (BoxAPIException ex) (

)
Node
// Verify that uploading a 200MB file named "Preso.ppt" to folder 12345 would succeed
client.files.preflightUploadFile(
		'12345',
		{
			name: 'Preso.ppt',
			size: 200000000
		},
		null,
		callback
	);