js ftpclient linux server,Node.JS用Socket实现FTP Server服务器和Client客户端
通信過程
FTP協(xié)議其實就是主機(jī)和服務(wù)通過Socket進(jìn)行固定格式的通信過程，當(dāng)某客戶端連接到FTP 服務(wù)器后，客戶端發(fā)送指令： [參數(shù)]
服務(wù)會按以下格式返回： [參數(shù)或說明]
例如以下是FileZilla FTP客戶端與服務(wù)器通信的過程：
"命令"為客戶端通過socket發(fā)送的消息，“響應(yīng)”為服務(wù)器端的返回響應(yīng): 220-FileZilla Server version 0.9.43 beta
響應(yīng): 220-written by Tim Kosse (tim.kosse@filezilla-project.org)
響應(yīng): 220 Please visit http://sourceforge.net/projects/filezilla/
命令: AUTH TLS
響應(yīng): 502 SSL/TLS authentication not allowed
命令: AUTH SSL
響應(yīng): 502 SSL/TLS authentication not allowed
命令: USER newghost
響應(yīng): 331 Password required for newghost
命令: PASS **************
響應(yīng): 230 Logged on
命令: SYST
響應(yīng): 215 UNIX emulated by FileZilla
命令: FEAT
響應(yīng): 211-Features:
響應(yīng): MDTM
響應(yīng): REST STREAM
響應(yīng): SIZE
響應(yīng): MLST type*;size*;modify*;
響應(yīng): MLSD
響應(yīng): UTF8
響應(yīng): CLNT
響應(yīng): MFMT
響應(yīng): 211 End
命令: PWD
響應(yīng): 257 "/" is current directory.
命令: TYPE I
響應(yīng): 200 Type set to I
命令: PASV
響應(yīng): 227 Entering Passive Mode (121,42,140,131,14,77)
命令: MLSD
響應(yīng): 150 Opening data channel for directory listing of "/"
響應(yīng): 226 Successfully transferred "/"
以下是FTP中的命令列表{
"ABOR": "Abort an active file transfer.",
"ACCT": "Account information.",
"ADAT": "Authentication/Security Data",
"ALLO": "Allocate sufficient disk space to receive a file.",
"APPE": "Append.",
"AUTH": "Authentication/Security Mechanism",
"CCC": "Clear Command Channel",
"CDUP": "Change to Parent Directory.",
"CONF": "Confidentiality Protection Command",
"CWD": "Change working directory.",
"DELE": "Delete file.",
"ENC": "Privacy Protected Channel",
"EPRT": "Specifies an extended address and port to which the server should connect.",
"EPSV": "Enter extended passive mode.",
"FEAT": "Get the feature list implemented by the server.",
"HELP": "Returns usage documentation on a command if specified, else a general help document is returned.",
"HOST": "Identify desired virtual host on server, by name.",
"LANG": "Language Negotiation",
"LIST": "Returns information of a file or directory if specified, else information of the current working directory is returned.",
"LPRT": "Specifies a long address and port to which the server should connect.",
"LPSV": "Enter long passive mode.",
"MDTM": "Return the last-modified time of a specified file.",
"MFCT": "Modify the creation time of a file.",
"MFF": "Modify fact (the last modification time, creation time, UNIX group/owner/mode of a file).",
"MFMT": "Modify the last modification time of a file.",
"MIC": "Integrity Protected Command",
"MKD": "Make directory.",
"MLSD": "Lists the contents of a directory if a directory is named.",
"MLST": "Provides data about exactly the object named on its command line, and no others.",
"MODE": "Sets the transfer mode (Stream, Block, or Compressed).",
"NLST": "Returns a list of file names in a specified directory.",
"NOOP": "No operation (dummy packet; used mostly on keepalives).",
"OPTS": "Select options for a feature (for example OPTS UTF8 ON).",
"PASS": "Authentication password.",
"PASV": "Enter passive mode.",
"PBSZ": "Protection Buffer Size",
"PORT": "Specifies an address and port to which the server should connect.",
"PROT": "Data Channel Protection Level.",
"PWD": "Print working directory. Returns the current directory of the host.",
"QUIT": "Disconnect.",
"REIN": "Re initializes the connection.",
"REST": "Restart transfer from the specified point.",
"RETR": "Retrieve a copy of the file",
"RMD": "Remove a directory.",
"RNFR": "Rename from.",
"RNTO": "Rename to.",
"SITE": "Sends site specific commands to remote server (like SITE IDLE 60 or SITE UMASK 002). Inspect SITE HELP output for complete list of supported commands.",
"SIZE": "Return the size of a file.",
"SMNT": "Mount file structure.",
"SPSV": "Use single port passive mode (only one TCP port number for both control connections and passive-mode data connections)",
"STAT": "Returns the current status.",
"STOR": "Accept the data and to store the data as a file at the server site",
"STOU": "Store file uniquely.",
"STRU": "Set file transfer structure.",
"SYST": "Return system type.",
"TYPE": "Sets the transfer mode (ASCII/Binary).",
"USER": "Authentication username.",
"XCUP": "Change to the parent of the current working directory",
"XMKD": "Make a directory",
"XPWD": "Print the current working directory",
"XRCP": "",
"XRMD": "Remove the directory",
"XRSQ": "",
"XSEM": "Send, mail if cannot",
"XSEN": "Send to terminal"
}
以下是FTP中的返回狀態(tài)碼列表:var REPLY_CODE = {
"110": "Restart marker reply.",
"120": "Service ready in nn minutes.",
"125": "Data Connection already open; transfer starting.",
"150": "File status okay; about to open data connection.",
"200": "Command okay.",
"202": "Command not implemented, superfluous at this site.",
"211": "System status, or system help reply.",
"212": "Directory status.",
"213": "File status.",
"214": "Help message.",
"215": "NAME system type.",
"220": "Service ready for new user.",
"221": "Service closing control connection.",
"225": "Data connection open; no transfer in progress.",
"226": "Closing data connection.",
"227": "Entering Passive Mode.",
"230": "User logged in, proceed. This status code appears after the client sends the correct password. It indicates that the user has successfully logged on.",
"250": "Requested file action okay, completed.",
"257": "'\"'PATHNAME'\"' created.",
"331": "User name okay, need password.",
"332": "Need account for login.",
"350": "Requested file action pending further information.",
"421": "Error 421 Service not available, closing control connection.\n Error 421 User limit reached\n Error 421 You are not authorized to make the connection\n Error 421 Max connections reached\n Error 421 Max connections exceeded",
"425": "Cannot open data connection.",
"426": "Connection closed; transfer aborted.",
"450": "Requested file action not taken.",
"451": "Requested action aborted: local error in processing.",
"452": "Requested action not taken. Insufficient storage space in system.",
"500": "Syntax error, command unrecognized, command line too long.",
"501": "Syntax error in parameters or arguments.",
"502": "Command not implemented.",
"503": "Bad sequence of commands.",
"504": "Command not implemented for that parameter.",
"530": "User not logged in.",
"532": "Need account for storing files.",
"550": "Requested action not taken. File unavailable, not found, not accessible",
"552": "Requested file action aborted. Exceeded storage allocation.",
"553": "Requested action not taken. File name not allowed.",
"10054": "Connection reset by peer. The connection was forcibly closed by the remote host.",
"10060": "Cannot connect to remote server.",
"10061": "Cannot connect to remote server. The connection is actively refused by the server.",
"10066": "Directory not empty.",
"10068": "Too many users, server is full."
}
一個簡易的FTP服務(wù)器
通過以上協(xié)議，我們可以編寫一個簡易的實現(xiàn)了登陸過程的FTP服務(wù)器，var net = require('net')
var COMMANDS = {
AUTH: function() {
this.send('502 SSL/TLS authentication not allowed.')
},
USER: function(username) {
this.session.username = username
this.send('331 User name okay, need password.')
},
PASS: function(password) {
var socket = this
var username = socket.username
if (username == 'newghost' && password == 'dachun') {
socket.send(230, 'Logged on')
} else {
socket.send(450, 'Ensure that you typed the correct user name and password combination.')
}
},
PWD: function(args) {
this.send('257 "/" is current directory')
},
TYPE: function(args) {
this.send('200 Type set to I')
},
EPSV: function(args) {
this.send('229 Entering Extended Passive Mode (|||30324|).')
},
PASV: function(args) {
this.send('227 Entering Passive Mode (112,124,126,185,165,12).')
},
MLSD: function(args) {
this.send('226 Successfully transferred "/"')
},
LIST: function(args) {
this.send('502 Command not implemented.')
this.send('502')
}
}
var sendHandler = function(type, message) {
var socket = this
var command
if (arguments.length < 2) {
if (REPLY_CODE[type]) {
command = REPLY_CODE[type]
} else {
command = type.toString()
}
} else {
command = type + ' ' + message
}
console.log('S:', command)
socket.write(command + '\r\n')
}
var ftpServer = net.createServer(function(socket) {
socket.session = {}
socket.send = sendHandler
socket.send(220, 'Welcome to OnceDoc FTP Server')
var onCommand = function(buffer) {
//receives.push(data)
//var buffer = Buffer.concat(receives).toString()
//receives = []
var buffers = buffer.toString()
var lines = buffers.split('\r\n')
for (var i = 0, l = lines.length; i < l; i++) {
var line = lines[i]
if (line) {
console.log('C:', line)
//lines.push(raw[i])
var cmds = line.split(' ')
var cmd = cmds[0].toUpperCase()
var arg = cmds.slice(1)
var func = COMMANDS[cmd]
func
? func.apply(socket, arg)
: socket.send(502)
}
}
}
socket
.on('data', onCommand)
.on('end', function() {
console.log('end', arguments)
})
.on('close', function () {
console.log('close', arguments)
})
.on('timeout', function () {
console.log('timeout', arguments)
})
.on('error', function (err) {
console.log('error', arguments)
})
}).on('error', function(err) {
// handle errors here
console.error(err)
})
//
ftpServer.listen({ port: 21 }, function() {
console.log('opened server on', ftpServer.address())
})
FTP 服務(wù)器端模塊
目前用Node.JS實現(xiàn)的服務(wù)端模塊還不多，大多不是很成熟，如
ftp-srvconst FtpSvr = require('ftp-srv')
const ftpServer = new FtpSvr('ftp://127.0.0.1:21')
ftpServer.on('login', function (data, resolve, reject) {
var connection = data.connection
var username = data.username
var password = data.password
if (data.username == 'anonymous') {
resolve({ root: 'D:\\github\\oncedoc\\onceoa' })
} else {
reject()
}
})
ftpServer
.listen()
.then(() => {
console.log('ready')
})
ftpServervar FTPServer = require('ftpserver').FTPServer
var ftpServer = new FTPServer({
host: '127.0.0.1',
port: 21,
pasvStart: null,
pasvEnd: null,
timeout: 30000,
disabledCommands: [],
anonymous: false,
logLevel: 10,
greeting: null,
override: {
fs: null,
authentication: null
}
})
ftpServer.listen().then(() => {
})
nodeftpd
FTP 客戶端模塊
目前基于node.js的FTP客戶端非常成熟，開源項目也比較多
JSFTPvar JSFtp = require("jsftp");
var Ftp = new JSFtp({
host: "myserver.com",
port: 3331, // defaults to 21
user: "user", // defaults to "anonymous"
pass: "1234" // defaults to "@anonymous"
});
Ftp.raw("mkd", "/new_dir", function(err, data) {
if (err) return console.error(err);
console.log(data.text); // Show the FTP response text to the user
console.log(data.code); // Show the FTP response code to the user
});
node-ftpvar c = new Client();
c.on('ready', function() {
c.list(function(err, list) {
if (err) throw err;
console.dir(list);
c.end();
});
});
// connect to localhost:21 as anonymous
c.connect();
node-ftps
這個項目是對lftp的node.js封裝var FTPS = require('ftps');
var ftps = new FTPS({
host: 'domain.com', // required
username: 'Test', // Optional. Use empty username for anonymous access.
password: 'Test', // Required if username is not empty, except when requiresPassword: false
protocol: 'sftp', // Optional, values : 'ftp', 'sftp', 'ftps', ... default: 'ftp'
// protocol is added on beginning of host, ex : sftp://domain.com in this case
port: 22, // Optional
// port is added to the end of the host, ex: sftp://domain.com:22 in this case
escape: true, // optional, used for escaping shell characters (space, $, etc.), default: true
retries: 2, // Optional, defaults to 1 (1 = no retries, 0 = unlimited retries)
timeout: 10, // Optional, Time before failing a connection attempt. Defaults to 10
retryInterval: 5, // Optional, Time in seconds between attempts. Defaults to 5
retryMultiplier: 1, // Optional, Multiplier by which retryInterval is multiplied each time new attempt fails. Defaults to 1
requiresPassword: true, // Optional, defaults to true
autoConfirm: true, // Optional, is used to auto confirm ssl questions on sftp or fish protocols, defaults to false
cwd: '', // Optional, defaults to the directory from where the script is executed
additionalLftpCommands: '', // Additional commands to pass to lftp, splitted by ';'
requireSSHKey: true, // Optional, defaults to false, This option for SFTP Protocol with ssh key authentication
sshKeyPath: '/home1/phrasee/id_dsa' // Required if requireSSHKey: true , defaults to empty string, This option for SFTP Protocol with ssh key authentication
});
// Do some amazing things
ftps.cd('some_directory').addFile(__dirname + '/test.txt').exec(console.log);
總結(jié)
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