B4A Library New Net library - Android FTP, SMTP and POP3

Erel · Aug 17, 2011

The Net library supports FTP, SMTP and POP3 protocols. This library replaces the FTP library. Both regular connections and SSL connections are supported.
SMTP - Allows to directly connect to SMTP mail servers and send mails, including Html messages and attachments.
POP3 - Allows to directly connect to POP3 mail servers and download messages. Currently the messages are not parsed. The raw string is returned. You can use MailParser class to parse the raw messages.

Installation instructions:
- Download the attach file.
- Copy Net.xml and Net.jar to the additional libraries folder. Make sure that there are no older copies in the internal libraries folder.

V1.81 - latest version
V1.80 - SMTP, POP and FTP can be configured to use a custom trust manager. This allows accepting invalid certificates.

V1.77 - New Sender.MailFrom field. Allows setting the mail address that is sent with the MAIL command. By default it is the same as the Username field.

V1.75 - Adds a configurable timeout parameter - FTP.TimeoutMs. Default timeout is set to 60000 (60 seconds).

V1.70 - Adds support for calling with Wait For: https://www.b4x.com/android/forum/threads/b4x-net-library-ftp-smtp-pop-with-wait-for.84821/
SMTP.AdditionalHeaders map. Allows adding headers to the messages.

V1.63 - Fixes an issue with SMTP mails with attachments. The closing boundary was previously missing.
V1.62 - Fixes an issue with SMTP in StartTLS mode.
V1.61 - Fixes an issue in SMTP related to the content encoding not being set in multipart messages.

V1.60 - New method: FTP.AppendFile. Similar to UploadFile. Appends the data to an existing file if such exists. It sends the APPE FTP command.

V1.53 - Fixes an issue with FTP.CloseNow and SSL connections.

V1.52 - Adds support for different types of authentication methods (SMTP): http://www.b4x.com/android/forum/th...d-ftp-smtp-and-pop3.10892/page-11#post-232432

V1.51 is released. Fixes an issue with FTP over SSL explicit mode.

V1.50 is released. See this link: http://www.b4x.com/android/forum/th...d-ftp-smtp-and-pop3.10892/page-10#post-231145

V1.37 is released. This version removes the automatic escaping of '=' characters in SMTP messages. To implement it in your code you should write:

B4X:

SMTP.Body = SMTP.Body.Replace("=", "=3D")

V1.35 is released. This version adds support for STARTTLS mode.
Unlike UseSSL mode the connection is "upgraded" to a secured connection only after the client sends the STARTTLS command.
Most of the popular smtp servers support this mode, usually on port 587.

B4X:

Sub Activity_Create(FirstTime As Boolean)
   If FirstTime Then
      smtpClient.Initialize("smtp.gmail.com", 587, "xxx@gmail.com", "yyy", "SmtpClient")
      smtpClient.StartTLSMode = True
   End If
End Sub

Mikonios · Apr 11, 2016

Hi,

I need capture FTP1.SendCommand("CD", DirFtp) response.

This code no work ::

B4X:

Sub FTP_CommandCompleted (ServerPath As String, Success As Boolean)
    If Not(Success) Then
        Log("SendCommandComplete failed : " & LastException)
        Csr.LogMemory1("   X02_MySndCmd   :: (Err)", "3")
        X55_SndMyFtpSale("    FTP_SendCommandComplete NoControlado")
    Else
        Log("SendCommandComplete Ok: ")
        X55_SndMyFtpSale("    FTP_SendCommandComplete Ok")
    End If
End Sub

And can't find xample documentation for FTP_CommandCompleted ::
((( https://www.b4x.com/android/help/net.html#ftp_sendcommand )))
SendCommand (Command As String, Parameters As String) Sends an FTP command.
The CommandCompleted event will be raised with the server reply. Should only be used with commands that return the reply in the command channel (not the data channel).
It is possible that Success will be false and LastException will not be initialized.

Anywhere can say me what´s correct sintax, or mode to get response, Pleased ??

Mikonios · Apr 11, 2016

Ok, this is SOLUTION my problema :::

B4X:

Sub FTP_CommandCompleted (ServerPath As String, Success As Boolean, Folders() As FTPEntry, Files() As FTPEntry)
    If Not(Success) Then
        Log("SendCommandComplete failed : " & LastException)
        Csr.LogMemory1("   X02_MySmbPut.Upload    :: (Err)", "3")
        X55_SndMyFtpSale("    FTP_SendCommandComplete NoControlado")
    Else
        Log("SendCommandComplete Ok: ")
        X55_SndMyFtpSale("    FTP_SendCommandComplete Ok")
    End If   
End Sub

Walter Adriano da Silva · May 20, 2016

Is TLS supported now?

DonManfred · May 20, 2016

Walter Adriano da Silva said:
Is TLS supported now?

I guess yes:

Erel said:
V1.62 - Fixes an issue with SMTP in StartTLS mode.

JohnC · May 30, 2016

I just verified (using android 5.0+ and this latest NET lib) that when a file is being transferred (uploading from device), the UI of my app hangs until the file is completed. I thought that the transfer is executed in a background thread, so why would it hang my apps' UI?

DonManfred · May 30, 2016

if i upload a file with ftp my ui does not hang.... i can work with the app till the complete event is raised....
What do you do that your app hangs?

JohnC · May 30, 2016

Everything freezes.....the horizontal scrolling of a table, pressing buttons, everything.

DonManfred · May 30, 2016

Do you block the mainthread?
How does your code looks like?

This works for me without blocking anything

B4X:

    If FirstTime Then
        'FTP.Initialize("FTP", "hdro-die-schwarze-hand.de", 21, "w00d7468", "3BzsLDPeoWDJWCVn")
        FTP.Initialize("FTP", "host", 21, "user", "password")
    End If
   
    Dim flist As List = File.ListFiles(File.Combine(File.DirRootExternal,"Download"))
    Log(flist)
    Log(File.Combine(File.DirRootExternal,"Download"))
    FTP.UploadFile(File.Combine(File.DirRootExternal,"Download"),"test.iso",False, "/test.iso")
    'FTP.UploadFile(File.DirAssets,File.Combine(File.DirRootExternal,"Download/test.iso"),False, "/test.iso")
End Sub

Sub FTP_UploadProgress (ServerPath As String, TotalUploaded As Long, Total As Long)
  s = "Uploaded " & (TotalUploaded / 1024 / 1024) & "MB"
  If Total > 0 Then s = s & " out of " & (Total / 1024 / 1024) & "MB"
  If s.EqualsIgnoreCase(old) Then
    Else
        old = s
        Label1.Text = s
        Log(s)
    End If
End Sub
Sub FTP_UploadCompleted (ServerPath As String, Success As Boolean)
  Log(ServerPath & ", Success=" & Success)
  Label1.Text = "Upload (18mb) completed!"
    If Success = False Then Log(LastException.Message)
End Sub

JohnC · May 30, 2016

This is my upload progress event sub - it shouldn't hang anything:

B4X:

Sub FTP_UploadProgress (ServerPath As String, TotalUploaded As Long, Total As Long)
    Dim s As String
    s = "Uploaded " & Round(TotalUploaded / 1000) & "KB"
    If Total > 0 Then s = s & " out of " & Round(Total / 1000) & "KB"
    Log(s & "(" & ServerPath & ")")
End Sub

JohnC · May 31, 2016

Erel,

My client and I can reproduce this condition at will and on multiple devices (some android 5.0 the others 6.0).

I am using your latest "NET" lib (v1.62).

If this makes a difference, the FTP.Initialize line and it's event subs are in a service module because I need to have the FTP happen in the background while the user is using another activity.

How can I prevent an FTP transfer from locking the UI of another activity?

Erel · May 31, 2016

All transfers happen in the background. Please start a new thread in the questions forum and post a small example that causes the UI to freeze.

rtek1000 · Jun 6, 2016

Hello guys,

SMTP from Gmail is impossible now for me.

The response error received on log redirects to page treatment of incorrect/insecure login, and offers an alternative from page:
https://support.google.com/accounts/answer/6010255?hl=en

"some apps or devices that do not use modern security standards"

To turn more insecure this acount but yet can not send any e-mail.

I try both ways, TLS and SSL.

Can you post a functional sample, please?

DonManfred · Jun 6, 2016

rtek1000 said:
Can you post a functional sample, please?

You need to enable unsecure clients in gmail

https://support.google.com/accounts/answer/6010255

rtek1000 · Jun 6, 2016

Hello again,

SMTP works fine now,
I made less secure options again:

https://www.google.com/settings/security/lesssecureapps

and I changed password too.

B4X:

Sub Send_Message(Msg1 As String)
   Dim SMTP1 As SMTP
   SMTP1.Initialize("smtp.gmail.com", 465, "user@gmail.com", "password", "smtpEventResponse")
   SMTP1.To.Add("user@gmail.com") 'change to real address
   SMTP1.Subject = "Test1"
   SMTP1.Body =  "123123123"
   SMTP1.UseSSL = True
   SMTP1.Send
End Sub
Sub smtpEventResponse_MessageSent(Success As Boolean)
   Log(Success)
   Log(LastException)
End Sub

Thank you.

rtek1000 · Jun 6, 2016

Hello,

It would be possible to reverse engineer the gmail app to see how it is modern authentication, or it is legally prevented?

Erel · Jun 6, 2016

It is not possible.

Don Oso · Jun 16, 2016

Its possible to send email without authentication?

im trying to send the email to a local relay server ?

Thanks
Javier

Erel · Jun 17, 2016

The SMTP always sends the AUTH command. Do you get any error in MessageSent event?

Don Oso · Jun 21, 2016

Erel said:
The SMTP always sends the AUTH command. Do you get any error in MessageSent event?

Yes I get errors when i try to send a message without AUTH or with empty values in user and password parameters . but i wonder maybe there another method to send messages without auth

I think that the best soluton here , its put authentication to the local SMTP server in my case.

thanks

Erel · Jun 21, 2016

Don Oso said:
but i wonder maybe there another method to send messages without auth

Currently no.

B4A Library New Net library - Android FTP, SMTP and POP3

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