Short for File Transfer Protocol, the protocol for exchanging files over the Internet. FTP works in the same way as HTTP for transferring Web pages from a server to a user's browser and SMTP for transferring electronic mail across the Internet in that, like these technologies, FTP uses the Internet's TCP/IP protocols to enable data transfer.
Click here to Jump directly to Sample Code
FTP is built on a client-server architecture and utilizes separate control and data connections between the client and server.FTP users may authenticate themselves using a clear-text sign-in protocol but can connect anonymously if the server is configured to allow it. FTP is most commonly used to download a file from a server using the Internet or to upload a file to a server (e.g., uploading a Web page file to a server).
Login
FTP login utilizes a normal username/password scheme for granting access. The username is sent to the server using the USER command, and the password is sent using the PASS command. If the information provided by the client is accepted by the server, the server will send a greeting to the client and the session will be open. If the server supports it, users may log in without providing login credentials. The server will also limit access for that session based on what the user is authorized.
Anonymous FTP
A host that provides an FTP service may additionally provide anonymous FTP access. Users typically log into the service with an 'anonymous' account when prompted for user name. Although users are commonly asked to send their email address in lieu of a password, no verification is actually performed on the supplied data.
Common FTP Commands
? | to request help or information about the FTP commands | |
ascii | to set the mode of file transfer to ASCII (this is the default and transmits seven bits per character) | |
binary | to set the mode of file transfer to binary (the binary mode transmits all eight bits per byte and thus provides less chance of a transmission error and must be used to transmit files other than ASCII files) | |
bye | to exit the FTP environment (same as quit) | |
cd | to change directory on the remote machine | |
close | to terminate a connection with another computer | |
close brubeck | closes the current FTP connection with brubeck, but still leaves you within the FTP environment. | |
delete | to delete (remove) a file in the current remote directory (same as rm in UNIX) | |
get | to copy one file from the remote machine to the local machine | |
get ABC DEF | copies file ABC in the current remote directory to (or on top of) a file named DEF in your current local directory. | |
get ABC | copies file ABC in the current remote directory to (or on top of) a file with the same name, ABC, in your current local directory. | |
help | to request a list of all available FTP commands | |
lcd | to change directory on your local machine (same as UNIX cd) | |
ls | to list the names of the files in the current remote directory | |
mkdir | to make a new directory within the current remote directory | |
mget | to copy multiple files from the remote machine to the local machine; you are prompted for a y/n answer before transferring each file | |
mget * | copies all the files in the current remote directory to your current local directory, using the same filenames. Notice the use of the wild card character, *. | |
mput | to copy multiple files from the local machine to the remote machine; you are prompted for a y/n answer before transferring each file | |
open | to open a connection with another computer | |
open brubeck | opens a new FTP connection with brubeck; you must enter a username and password for a brubeck account (unless it is to be an anonymous connection). | |
put | to copy one file from the local machine to the remote machine | |
pwd | to find out the pathname of the current directory on the remote machine | |
quit | to exit the FTP environment (same as bye) | |
rmdir | to to remove (delete) a directory in the current remote directory |
No comments:
Post a Comment
NO JUNK, Please try to keep this clean and related to the topic at hand.
Comments are for users to ask questions, collaborate or improve on existing.