Simple ftp server for windows11/16/2023 ![]() ![]() Supported FTP commandsīefore you start the server, you should create a folder named test in the folder, where you want to start the server.On the computer that will host your FTP server, you’ll need a user account with administrator or root privileges to install, configure, and administer the server. Every FTP command has its own handler function.įor implementation details on the handler functions please refer to the comments/javadoc. The incoming command is sent of to a central mini-dispatcher function called "executeCommand", which splits the command from the arguments and then dispatches it with a big switch/case statement. Every iteration of the loop gets a new command from the input stream that is connected to the client socket. Therefore it uses a central while-loop (line 95). The Worker class takes care of handling all FTP commands. So for every new data connection a new thread will be created, making this a multi-threaded server. As soon as it receives a new connection it will hand it off to the Worker class within a new thread. The Server class is listening for new connections. This implementation consists of two classes: Server and Worker. To overcome this, one would probably have to use some kind of external API. This is because the Java socket implementation does not reliably return the external IP of the corresponding network device. If it needs to run on another host, the external server IP must be manually set as "myIp" in handlePasv(). If the FTP server and client are running on the same host, it can only work in Passive Mode.This could easily be exploited to crash the server by just opening several thousands of connections until the JVM crashes. The number of accepted connections is not limited.Java allows sockets on ports below 1024 only when the JVM is executed in super user mode (which IDEs normally won't do). If this is executed within an IDE (like Eclipse or IntelliJ IDEA), the control port likely needs to be a number larger than 1024.Two clients writing to the same file will result in invalid results. File system access is not synchronized.This implementation only prints names of files and folders, no additional information. Not working with GUI ftp clients, because they need to receive directory listings in /bin/ls format.Supports extended FTP arguments (EPSV instead of PASV and EPRT instead of EPRT).User name and password are not case sensitive Default user name is "comp4621" and password is "network".Standard control port is 1025, standard data port is 1026.Multi threaded (multiple users can transfer files at the same time).Supports binary/image and ASCII transfer mode.Supports both IPv4 and IPv6 (thanks to Support for both active and passive mode connections.Works with standard Windows/Linux/Mac terminal tools ftp, telnet and curl.The main features of this implementation are: Run it at your own risk – you probably should not use it in production. This is a simple implementation of a FTP server in Java, which was built as a class project for COMP4621 (Computer Communication Networks) at Hong Kong University of Science and Technology (HKUST) in fall semester of 2016. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |