I wonder if you have tried this problem, I use the WINSOCK implementation FTP file download, more have a 30% chance when download different files are "503 Bad sequence of commands." this mistake, but to download appeared likely to other files, do you have encountered this problem, how to solve? Thank you very much!

Code should be normal, because I won't put up too long, download a file, only about 5%

CodePudding user response:

A problem, I think may be the authentication or connection timeout, the network is not stable, and so on, occasional good difficult to troubleshoot

Also ask why use WINSOCK? Why not use Inet?

CodePudding user response:

WINSOCK, after all, is not sensitive to the authentication and user authentication

CodePudding user response:

Still feeling the problem on the process, from ask posts before you can see your program have big problem in our process control, corresponding to the biggest may be a data file before has not processed you to begin to request a file