Problem Boundary
DLOG_FILE_TO_FTP must authenticate to an FTP server whose username is an email address. The username therefore contains an @ character, while the block's URL or credential string also uses @ as a separator. The evidence does not identify the block version, manufacturer, runtime, or exact failure response, so the affected implementation range remains unknown.
Why %40 Does Not Resolve the Username
The available implementation note states that generic %xx URL encoding and decoding was omitted because of memory and resource constraints. Therefore, do not assume that %40 will be decoded to @ by DLOG_FILE_TO_FTP.
| Input representation | Supported conclusion |
|---|---|
@ |
Required inside the final email-style username, but conflicts with the credential separator. |
%40 |
Not supported by the described implementation because generic percent decoding is absent. |
% |
A proposed modified client translates this character to @ within the username. |
Apply and Verify the Workaround
The proposed workaround is a modified FTP client that accepts a literal percent sign in place of the username's @, then changes that percent sign to @ before authentication. This is a special substitution, not standard %40 decoding.
USER%DOMAIN@PASSWORD
Internal username after substitution:
USER@DOMAIN- Replace only the email username's
@with%; do not enter%40. - Retain the block's credential separator before the password.
- Use a client version containing the percent-to-
@substitution. - Test with non-production credentials and confirm that the FTP server receives the complete email-style username.
The supplied modification was explicitly described as untested. Treat it as a candidate workaround until login succeeds and file transfer completes. If the installed block lacks this modification, the evidence provides no supported configuration-only solution.
FAQ
Can DLOG_FILE_TO_FTP use %40 for an @ character?
Do not assume so. The described implementation does not include generic %xx decoding, so %40 is not a supported replacement based on the available evidence.
How do I use an email address as the FTP username?
With the proposed modified client, replace the username's @ with a single %. The client must then convert that character back to @ before authentication.
Is the percent-sign FTP workaround verified?
No. The modification was supplied as untested, so verify both successful authentication and completed file transfer before deploying it.