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https://issues.apache.org/jira/browse/NET-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12489735
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Gilles Gaillard commented on NET-158:
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Hi Rory
here is a trace of the conversation:
Status: Connecting to perso-ftp.orxxxx.fr ...
Status: Connected with perso-ftp.orxxxx.fr. Waiting for welcome message...
Response: 220 orxxxx FTP server
Command: USER xxxx
Response: 331 Password required for xxxx.
Command: PASS
Response: 451 Pour transférer vos pages HTML sur le serveur orxxxx, vous
devrez etc..
Response: 530 Login incorrect.
Error: Unable to connect!
After connecting, responses for SYST and FEAT:
Command: SYST
Response: 215 UNIX Type: L8
Command: FEAT
Response: 211-Features:
Response: 211-MDTM
Response: 211-REST STREAM
Response: 211-SIZE
Response: 211 End
I have implemented the change that i proposed and it works with all servers i
tried (this one, Filezilla server, iis)
> login in FTPClient does not always read the complete server response
> --------------------------------------------------------------------
>
> Key: NET-158
> URL: https://issues.apache.org/jira/browse/NET-158
> Project: Commons Net
> Issue Type: Bug
> Affects Versions: 1.4
> Reporter: Gilles Gaillard
> Priority: Trivial
>
> When a password is required to connect the FTP server, the implementation of
> method login in class FTPClient ends with:
> return FTPReply.isPositiveCompletion(pass(password))
> which returns false for any code >= 300.
> However, some servers send a code 451 before returning the code 530
> (NOT_LOGGED_IN). Ignoring this addtional answer,
> leads to desynch the client with the server, hence leading to unexpected
> behaviors in next exchanges.
> Threfore i propose to replace the above code in the end of the method with:
> _replyCode = p_Client.pass(p_Password);
> boolean result = FTPReply.isPositiveCompletion(_replyCode);
> if (!result && _replyCode==FTPReply.ACTION_ABORTED){
> try {
> _replyCode = p_Client.getReply();
> } catch (Exception e){
> e.printStackTrace();
> }
> }
> return result;
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