# CFWriteStreamCreateWithFTPURL(_:_:) Creates an FTP write stream. ``` func CFWriteStreamCreateWithFTPURL(_ alloc: CFAllocator?, _ ftpURL: CFURL) -> Unmanaged ``` ## Parameters `alloc` The allocator to use to allocate memory for the new object. Pass `NULL` or kCFAllocatorDefault to use the current default allocator. `ftpURL` A pointer to a CFURL structure for the URL to be uploaded created by calling any of the `CFURLCreate` functions, such as `CFURLCreateWithString`. ## Return Value A new write stream, or `NULL` if the call failed. Ownership follows the [The Create Rule](https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html#//apple_ref/doc/uid/20001148-103029). ## Discussion This function creates an FTP write stream for uploading data to an FTP URL. If the `ftpURL` parameter is created with the user name and password as part of the URL (such as `ftp://username:password@ftp.example.com`) then the user name and password will automatically be set in the `CFWriteStream`. Call to set the steam’s properties, such as `kCFStreamPropertyFTPUserName` and `kCFStreamPropertyFTPPassword` to associate a user name and password with the stream that are used to log in when the stream is opened. See `Constants` for a description of all FTP stream properties. After creating the write stream, you can call at any time to check the status of the stream. To initiate a connection with the FTP server, call . If the URL specifies a directory, the open is immediately followed by the event `kCFStreamEventEndEncountered` (and the stream passes to the state `kCFStreamStatusAtEnd`). Once the stream reaches this state, the directory has been created. Intermediary directories are not created. To write to the FTP stream, call . To close a connection with the FTP server, call . --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)