如何修复MaxListenersExceededWarning错误?
在我的Node.js
http网络服务器中,我使用ssh2-sftp-client库从远程csv
服务器加载SFTP
文件。当用户尝试加载多个文件并且我不明白如何修复它时会引发错误?
码:
router.post('/', (req, res) => {
const fileName = req.body.file_name
const remotePath = '/reports/' + fileName
const localePath = path.join(process.env.HOME || process.env.USERPROFILE, 'Downloads/' + fileName)
sftp.connect(config.sftpServer, 'on').then(() => {
sftp.fastGet(remotePath, localePath, {}).then(() => {
res.header('Content-type', 'text/csv; charset=windows-1251')
res.sendFile(localePath)
sftp.end()
}).catch((err) => {
sftp.end()
console.log(err, 'fastGet method error')
})
}).catch((err) => {
sftp.end()
console.log(err, 'connect method error')
})
})
错误:
Error: Failed to connect to server: (SSH) Channel open failure: open failed
at client.sftp (/node_modules/ssh2-sftp-client/src/index.js:456:18)
at /node_modules/ssh2/lib/client.js:867:14
at SSH2Stream.onFailure (/node_modules/ssh2/lib/client.js:1211:5)
at Object.onceWrapper (events.js:277:13)
at SSH2Stream.emit (events.js:189:13)
at parsePacket (/node_modules/ssh2-streams/lib/ssh.js:3709:10)
at SSH2Stream._transform (/node_modules/ssh2-streams/lib/ssh.js:671:13)
at SSH2Stream.Transform._read (_stream_transform.js:190:10)
at SSH2Stream._read (/node_modules/ssh2-streams/lib/ssh.js:253:15)
at SSH2Stream.Transform._write (_stream_transform.js:178:12) 'connect method error'
Error: Failed to connect to server: (SSH) Channel open failure: open failed
at client.sftp (/node_modules/ssh2-sftp-client/src/index.js:456:18)
at /node_modules/ssh2/lib/client.js:867:14
at SSH2Stream.onFailure (/node_modules/ssh2/lib/client.js:1211:5)
at Object.onceWrapper (events.js:277:13)
at SSH2Stream.emit (events.js:189:13)
at parsePacket (/node_modules/ssh2-streams/lib/ssh.js:3709:10)
at SSH2Stream._transform (/node_modules/ssh2-streams/lib/ssh.js:671:13)
at SSH2Stream.Transform._read (_stream_transform.js:190:10)
at SSH2Stream._read (/node_modules/ssh2-streams/lib/ssh.js:253:15)
at SSH2Stream.Transform._write (_stream_transform.js:178:12) 'connect method error'
Error: Failed to connect to server: (SSH) Channel open failure: open failed
at client.sftp (/node_modules/ssh2-sftp-client/src/index.js:456:18)
at /node_modules/ssh2/lib/client.js:867:14
at SSH2Stream.onFailure (/node_modules/ssh2/lib/client.js:1211:5)
at Object.onceWrapper (events.js:277:13)
at SSH2Stream.emit (events.js:189:13)
at parsePacket (/node_modules/ssh2-streams/lib/ssh.js:3709:10)
at SSH2Stream._transform (/node_modules/ssh2-streams/lib/ssh.js:671:13)
at SSH2Stream.Transform._read (_stream_transform.js:190:10)
at SSH2Stream._read (/node_modules/ssh2-streams/lib/ssh.js:253:15)
at SSH2Stream.Transform._write (_stream_transform.js:178:12) 'connect method error'
回答如下:
最后我发现了问题。而不是on
方法,你需要使用once
方法。
sftp.connect(config.sftpServer, 'once').then(() => {
// CODE
}
如何修复MaxListenersExceededWarning错误?
在我的Node.js
http网络服务器中,我使用ssh2-sftp-client库从远程csv
服务器加载SFTP
文件。当用户尝试加载多个文件并且我不明白如何修复它时会引发错误?
码:
router.post('/', (req, res) => {
const fileName = req.body.file_name
const remotePath = '/reports/' + fileName
const localePath = path.join(process.env.HOME || process.env.USERPROFILE, 'Downloads/' + fileName)
sftp.connect(config.sftpServer, 'on').then(() => {
sftp.fastGet(remotePath, localePath, {}).then(() => {
res.header('Content-type', 'text/csv; charset=windows-1251')
res.sendFile(localePath)
sftp.end()
}).catch((err) => {
sftp.end()
console.log(err, 'fastGet method error')
})
}).catch((err) => {
sftp.end()
console.log(err, 'connect method error')
})
})
错误:
Error: Failed to connect to server: (SSH) Channel open failure: open failed
at client.sftp (/node_modules/ssh2-sftp-client/src/index.js:456:18)
at /node_modules/ssh2/lib/client.js:867:14
at SSH2Stream.onFailure (/node_modules/ssh2/lib/client.js:1211:5)
at Object.onceWrapper (events.js:277:13)
at SSH2Stream.emit (events.js:189:13)
at parsePacket (/node_modules/ssh2-streams/lib/ssh.js:3709:10)
at SSH2Stream._transform (/node_modules/ssh2-streams/lib/ssh.js:671:13)
at SSH2Stream.Transform._read (_stream_transform.js:190:10)
at SSH2Stream._read (/node_modules/ssh2-streams/lib/ssh.js:253:15)
at SSH2Stream.Transform._write (_stream_transform.js:178:12) 'connect method error'
Error: Failed to connect to server: (SSH) Channel open failure: open failed
at client.sftp (/node_modules/ssh2-sftp-client/src/index.js:456:18)
at /node_modules/ssh2/lib/client.js:867:14
at SSH2Stream.onFailure (/node_modules/ssh2/lib/client.js:1211:5)
at Object.onceWrapper (events.js:277:13)
at SSH2Stream.emit (events.js:189:13)
at parsePacket (/node_modules/ssh2-streams/lib/ssh.js:3709:10)
at SSH2Stream._transform (/node_modules/ssh2-streams/lib/ssh.js:671:13)
at SSH2Stream.Transform._read (_stream_transform.js:190:10)
at SSH2Stream._read (/node_modules/ssh2-streams/lib/ssh.js:253:15)
at SSH2Stream.Transform._write (_stream_transform.js:178:12) 'connect method error'
Error: Failed to connect to server: (SSH) Channel open failure: open failed
at client.sftp (/node_modules/ssh2-sftp-client/src/index.js:456:18)
at /node_modules/ssh2/lib/client.js:867:14
at SSH2Stream.onFailure (/node_modules/ssh2/lib/client.js:1211:5)
at Object.onceWrapper (events.js:277:13)
at SSH2Stream.emit (events.js:189:13)
at parsePacket (/node_modules/ssh2-streams/lib/ssh.js:3709:10)
at SSH2Stream._transform (/node_modules/ssh2-streams/lib/ssh.js:671:13)
at SSH2Stream.Transform._read (_stream_transform.js:190:10)
at SSH2Stream._read (/node_modules/ssh2-streams/lib/ssh.js:253:15)
at SSH2Stream.Transform._write (_stream_transform.js:178:12) 'connect method error'
回答如下:
最后我发现了问题。而不是on
方法,你需要使用once
方法。
sftp.connect(config.sftpServer, 'once').then(() => {
// CODE
}