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index.ts
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index.ts
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import net = require('net');
class TelnetSocket {
netSocket: net.Socket
constructor(netSocket: TelnetSocket['netSocket']) {
this.netSocket = netSocket
}
close() {
this.netSocket.end()
this.netSocket.removeAllListeners()
}
wait(ms: number) {
return new Promise<void>((resolve) => setTimeout(resolve, ms))
}
writeBuffer(data: Buffer) {
return new Promise<void>((resolve, reject) => {
const resolve_callback = (err?: Error) => {
this.netSocket.removeListener('error', reject)
err ? reject(err) : resolve()
}
this.netSocket.once('error', reject)
this.netSocket.write(data, resolve_callback)
})
}
async writeString(data: string, lineFeed = true) {
return await this.writeBuffer(Buffer.from(lineFeed ? data + '\r\n' : data))
}
readBuffer(overtime = 10000) {
return new Promise<Buffer>((resolve, reject) => {
const overtime_timer = setTimeout(() => {
this.netSocket.removeListener('error', reject)
this.netSocket.removeListener('data', reject)
reject(new Error('等待流信息超时'))
}, overtime)
const resolve_callback = (data: Buffer) => {
this.netSocket.removeListener('error', reject)
clearTimeout(overtime_timer)
resolve(data)
}
const reject_callback = (reason?: any) => {
this.netSocket.removeListener('data', reject)
clearTimeout(overtime_timer)
reject(reason)
}
this.netSocket.once('error', reject_callback)
this.netSocket.once('data', resolve_callback)
})
}
async readString(overtime?: number) {
return (await this.readBuffer(overtime)).toString()
}
async readStringMatch(regExp: RegExp, overtime?: number) {
const str = await this.readString(overtime)
const match = str.match(regExp)
if (match) {
return match
} else {
throw new Error(`使用 /${regExp.source}/${regExp.flags} 匹配文本失败: ${str}`)
}
}
async readBufferUntil(find_str: string, overtime?: number) {
const find_buf = Buffer.from(find_str)
let new_buf = await this.readBuffer(overtime)
let all_buf = new_buf
while (!all_buf.includes(find_buf, find_buf.length * -2)) {
new_buf = await this.readBuffer(overtime)
all_buf = Buffer.concat([all_buf, new_buf]);
}
return all_buf
}
async readStringUntil(find_str: string, overtime?: number) {
const read_buf = await this.readBufferUntil(find_str, overtime)
return read_buf.toString()
}
}
export class TelnetServer {
private netServer: net.Server
private config = {
showLog: false
}
constructor(port: number, config: Partial<TelnetServer['config']>, callback: (telnetSocket: TelnetSocket, netSocket: net.Socket) => Promise<void>) {
Object.assign(this.config, config)
this.netServer = net.createServer((netSocket: net.Socket) => {
this.config.showLog && console.log(`收到新的连接 ${netSocket.remoteAddress}:${netSocket.remotePort}`)
netSocket.on('error', () => {
telnetSocket.close()
})
if (this.config.showLog) {
netSocket.on('data', (data) => {
console.log(`收到来自服务器消息 ${netSocket.remoteAddress}:${netSocket.remotePort}\n`, data.toString())
})
}
const telnetSocket = new TelnetSocket(netSocket)
callback(telnetSocket, netSocket).then(() => {
telnetSocket.close()
this.config.showLog && console.log(`回调跑完关闭端口 ${netSocket.remoteAddress}:${netSocket.remotePort}`)
}).catch((e) => {
telnetSocket.close()
this.config.showLog && console.error(`回调中途出错 ${netSocket.remoteAddress}:${netSocket.remotePort}\n`, e)
})
})
this.netServer.on('error', (e) => {
e.message = `侦听${port}端口失败: ` + e.message
throw e
})
this.netServer.listen(port, () => {
console.info(`侦听${port}端口成功, 开始运行服务`)
})
}
showLog() {
this.config.showLog = true
}
}
// export const telnetServer = (port: number, callback: (client: telnetSocket) => Promise<void>) => {
// }