Upload a file via FTP on iOS or macOS

FTPUpload.swift

import Foundation
import CFNetwork

public class FTPUpload {
    fileprivate let ftpBaseUrl: String
    fileprivate let directoryPath: String
    fileprivate let username: String
    fileprivate let password: String

    public init(baseUrl: String, userName: String, password: String, directoryPath: String) {
        self.ftpBaseUrl = baseUrl
        self.username = userName
        self.password = password
        self.directoryPath = directoryPath
    }
}


// MARK: - Steam Setup
extension FTPUpload {
    private func setFtpUserName(for ftpWriteStream: CFWriteStream, userName: CFString) {
        let propertyKey = CFStreamPropertyKey(rawValue: kCFStreamPropertyFTPUserName)
        CFWriteStreamSetProperty(ftpWriteStream, propertyKey, userName)
    }

    private func setFtpPassword(for ftpWriteStream: CFWriteStream, password: CFString) {
        let propertyKey = CFStreamPropertyKey(rawValue: kCFStreamPropertyFTPPassword)
        CFWriteStreamSetProperty(ftpWriteStream, propertyKey, password)
    }

    fileprivate func ftpWriteStream(forFileName fileName: String) -> CFWriteStream? {
        let fullyQualifiedPath = "ftp://\(ftpBaseUrl)/\(directoryPath)/\(fileName)"

        guard let ftpUrl = CFURLCreateWithString(kCFAllocatorDefault, fullyQualifiedPath as CFString, nil) else { return nil }
        let ftpStream = CFWriteStreamCreateWithFTPURL(kCFAllocatorDefault, ftpUrl)
        let ftpWriteStream = ftpStream.takeRetainedValue()
        setFtpUserName(for: ftpWriteStream, userName: username as CFString)
        setFtpPassword(for: ftpWriteStream, password: password as CFString)
        return ftpWriteStream
    }
}


// MARK: - FTP Write
extension FTPUpload {
    public func send(data: Data, with fileName: String, success: @escaping ((Bool)->Void)) {

        guard let ftpWriteStream = ftpWriteStream(forFileName: fileName) else {
            success(false)
            return
        }

        if CFWriteStreamOpen(ftpWriteStream) == false {
            print("Could not open stream")
            success(false)
            return
        }

        let fileSize = data.count
        let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: fileSize)
        data.copyBytes(to: buffer, count: fileSize)

        defer {
            CFWriteStreamClose(ftpWriteStream)
            buffer.deallocate(capacity: fileSize)
        }

        var offset: Int = 0
        var dataToSendSize: Int = fileSize

        repeat {
            let bytesWritten = CFWriteStreamWrite(ftpWriteStream, &buffer[offset], dataToSendSize)
            if bytesWritten > 0 {
                offset += bytesWritten.littleEndian
                dataToSendSize -= bytesWritten
                continue
            } else if bytesWritten < 0 {
                // ERROR
                print("FTPUpload - ERROR")
                break
            } else if bytesWritten == 0 {
                // SUCCESS
                print("FTPUpload - Completed!!")
                break
            }
        } while CFWriteStreamCanAcceptBytes(ftpWriteStream)
        
        success(true)
    }
}

Could you please rewrite this to NSURLSessionAPI, because I get also the warnings. Thanks!

For me, it also didn't work for larger files, here is a fix (change this in extension FTPUpload):

      var offset: Int = 0
        var dataToSendSize: Int = fileSize
        
        var shouldContinue = true
        repeat {
            if (CFWriteStreamCanAcceptBytes(ftpWriteStream)) {
                let bytesWritten = CFWriteStreamWrite(ftpWriteStream, &buffer[offset], dataToSendSize)
                print("ftp bytes written: \(bytesWritten)")
                if bytesWritten > 0 {
                    offset += bytesWritten.littleEndian
                    dataToSendSize -= bytesWritten
                    continue
                } else if bytesWritten < 0 {
                    // ERROR
                    print("FTPUpload - ERROR")
                    shouldContinue = false
                    break
                } else if bytesWritten == 0 {
                    // SUCCESS
                    print("FTPUpload - Completed!!")
                    shouldContinue = false
                    break
                }
            } else {
                usleep(200000)
                print(".", separator: "", terminator: "")
            }
        } while shouldContinue
        
        success(true)
  

Hello,

Can you post an example of how you call that method?

thanks

I want to upload an audio file to server 120.1xx.1xx.1xx , username = "abcd" , password = "wxyz",
audio file: tmpURL = URL(fileURLWithPath: NSTemporaryDirectory() + "audio.wav")
someone please tell me how to use this code?

Same issue as rajan2211. (I am able to upload small m4a files, large files are not getting uploaded correctly.)
Tried Gondomir solution but it didn't work.
Any suggestion?

test12345

<script>alert(‘test’)</script>

test56789

Hi there,

Thank you very much for sharing your code @Nirma !

Actually the file wasn't send properly in my case as well but I found this StackOverflow answer useful ; the while should be changed to while true and the break will properly stop the loop once there is no bytes to send anymore.

Hello Nirma,
Thank you for sharing this code that too in swift. This saves me a day.
I want to implement pause, resume and cancel for the above upload functionality. Could you please help me out to implement pause, resume and cancel.

Thanks in advance,
Mamatha

Great example and modification @Gondomir, still work in 2019 Oct.

Hello,
Can you please provide me code suggestion to download files (also directory) from ftp?
thank you

Fix for freeze when upload.

`
DispatchQueue.global(qos: .background).async {[weak self] in
guard let _self = self else{return}

        let fileSize = data.count
        let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: fileSize)
        data.copyBytes(to: buffer, count: fileSize)
        
        defer {
            CFWriteStreamClose(ftpWriteStream)
            buffer.deallocate()
        }
        
        
        
        var offset: Int = 0
        var dataToSendSize: Int = fileSize
        
        var shouldContinue = true
        
        while shouldContinue {
            let bytesWritten = CFWriteStreamWrite(ftpWriteStream, &buffer[offset], dataToSendSize)
            
            print("ftp bytes written: \(bytesWritten)")
            
            if bytesWritten > 0 {
                offset += bytesWritten.littleEndian
                dataToSendSize -= bytesWritten
                
            } else if bytesWritten < 0 {
                // ERROR
                
                print("FTPUpload - ERROR with \(CFWriteStreamGetError(ftpWriteStream))")
                shouldContinue = false
                success(false)
                
            } else if bytesWritten == 0 {
                // SUCCESS
                
                
                print( "FTPUpload - Completed!!")
                shouldContinue = false
                
                success(true)
                
            }
            
           
        }
    }`

Can anyone assist with using this to upload a local video file on the device to FTP?

I've got it working with an image, just curious how I can arrange it to upload a .mp4/.mov file.

Can anyone assist with using this to upload a local video file on the device to FTP?

I've got it working with an image, just curious how I can arrange it to upload a .mp4/.mov file.

Can you tell me how it works with image or txt file?
I cannot find the right data type for the send function.
Thanks!!

Can anyone assist with using this to upload a local video file on the device to FTP?
I've got it working with an image, just curious how I can arrange it to upload a .mp4/.mov file.

Can you tell me how it works with image or txt file?
I cannot find the right data type for the send function.
Thanks!!

Sure, for a .txt file, make sure the file is added to your project. To upload the file you would use:

let ftp = FTPUpload(baseUrl: String, userName: String, password: String, directoryPath: String)

do { 
let data = try Data(contentsOf: url (this is your .txt file location as a URL) as URL, options: [ .alwaysMapped, .uncached])

ftp.send(data: data , with: "name.txt") { (success) in 

        print("success") 
        }
        print(data)
        }
        catch {
        print(error)
    }
}

Hope this helps!

Can anyone assist with using this to upload a local video file on the device to FTP?
I've got it working with an image, just curious how I can arrange it to upload a .mp4/.mov file.

Can you tell me how it works with image or txt file?
I cannot find the right data type for the send function.
Thanks!!

Sure, for a .txt file, make sure the file is added to your project. To upload the file you would use:

let ftp = FTPUpload(baseUrl: String, userName: String, password: String, directoryPath: String)

do { 
let data = try Data(contentsOf: url (this is your .txt file location as a URL) as URL, options: [ .alwaysMapped, .uncached])

ftp.send(data: data , with: "name.txt") { (success) in 

        print("success") 
        }
        print(data)
        }
        catch {
        print(error)
    }
}

Hope this helps!

I think I got it. But I have a problem with file access.
I got error message, although, I have switched off the AppSandbox already.

Error Domain=NSCocoaErrorDomain Code=257 "The file “XXX” couldn’t be opened because you don’t have permission to view it." UserInfo={NSFilePath=/Users/XXX, NSUnderlyingError=0x600000c8d4d0 {Error Domain=NSPOSIXErrorDomain Code=13 "Permission denied"}}
It seems I don't have access to that file?

    repeat {
        let bytesWritten = CFWriteStreamWrite(ftpWriteStream, &buffer[offset], dataToSendSize)
        if bytesWritten > 0 {
            offset += bytesWritten.littleEndian
            dataToSendSize -= bytesWritten
            continue
        } else if bytesWritten < 0 {
            // ERROR
            print("FTPUpload - ERROR")
            break
        } else if bytesWritten == 0 {
            // SUCCESS
            print("FTPUpload - Completed!!")
            break
        }
    } while CFWriteStreamCanAcceptBytes(ftpWriteStream)
    
    success(true)
}

I am getting -1 in bytesWritten that why file is written and I have check dataToSendSize is 8000 in size but bytesWritten getting -1 in first time that why file in writing.

Please help me.

Thanks

Works perfectly thank you sir.

not working for me bytesWritten return -1 at first time

Can anyone assist with using this to upload a local video file on the device to FTP?
I've got it working with an image, just curious how I can arrange it to upload a .mp4/.mov file.

Can you tell me how it works with image or txt file?
I cannot find the right data type for the send function.
Thanks!!

Sure, for a .txt file, make sure the file is added to your project. To upload the file you would use:

let ftp = FTPUpload(baseUrl: String, userName: String, password: String, directoryPath: String)

do { 
let data = try Data(contentsOf: url (this is your .txt file location as a URL) as URL, options: [ .alwaysMapped, .uncached])

ftp.send(data: data , with: "name.txt") { (success) in 

        print("success") 
        }
        print(data)
        }
        catch {
        print(error)
    }
}

Hope this helps!

I think I got it. But I have a problem with file access.
I got error message, although, I have switched off the AppSandbox already.

Error Domain=NSCocoaErrorDomain Code=257 "The file “XXX” couldn’t be opened because you don’t have permission to view it." UserInfo={NSFilePath=/Users/XXX, NSUnderlyingError=0x600000c8d4d0 {Error Domain=NSPOSIXErrorDomain Code=13 "Permission denied"}}
It seems I don't have access to that file?

Are you trying to access the file on your development machine? Make sure you've added the file you are trying to access to your xcode project file. That might be the cause.

Can anyone assist with using this to upload a local video file on the device to FTP?
I've got it working with an image, just curious how I can arrange it to upload a .mp4/.mov file.

Can you tell me how it works with image or txt file?
I cannot find the right data type for the send function.
Thanks!!

Sure, for a .txt file, make sure the file is added to your project. To upload the file you would use:

let ftp = FTPUpload(baseUrl: String, userName: String, password: String, directoryPath: String)

do { 
let data = try Data(contentsOf: url (this is your .txt file location as a URL) as URL, options: [ .alwaysMapped, .uncached])

ftp.send(data: data , with: "name.txt") { (success) in 

        print("success") 
        }
        print(data)
        }
        catch {
        print(error)
    }
}

Hope this helps!

I think I got it. But I have a problem with file access.
I got error message, although, I have switched off the AppSandbox already.
Error Domain=NSCocoaErrorDomain Code=257 "The file “XXX” couldn’t be opened because you don’t have permission to view it." UserInfo={NSFilePath=/Users/XXX, NSUnderlyingError=0x600000c8d4d0 {Error Domain=NSPOSIXErrorDomain Code=13 "Permission denied"}}
It seems I don't have access to that file?

Are you trying to access the file on your development machine? Make sure you've added the file you are trying to access to your xcode project file. That might be the cause.

But I would like to upload a file each time when I create by my app. So it is no possible for me to add those files into the project file, right? Is there another way? Is there another method to access files?

### Now working for me.

How create folder in server?

How to download/view file from FTP Server.

How create folder in server?

Manually

Now working for me.

I have solved my problem but facing the same problem as you.
The bytesWritten equals to -1 and it is not going to upload anything...
Did you solve your problem?

Works perfectly thank you sir.

not working for me bytesWritten return -1 at first time

I got it. I have looked through the meaning of bytesWritten equals to -1 and it turns out there is error by connection.
By my side it is maybe because of too many connections already existed so I restart my device and it worked then.

anyway, the bytesWritten equals to -1 doesn't mean you have a problem with the file, but it is mostly because of the connection.

Works perfectly thank you sir.

not working for me bytesWritten return -1 at first time

I got it. I have looked through the meaning of bytesWritten equals to -1 and it turns out there is error by connection.
By my side it is maybe because of too many connections already existed so I restart my device and it worked then.

anyway, the bytesWritten equals to -1 doesn't mean you have a problem with the file, but it is mostly because of the connection.

It can be because of problem in credentials.

Is there any Lib or same as above class that we can get file URL so that we can load the url or download that attachment?