mirror of
https://github.com/n8n-io/n8n.git
synced 2024-09-20 23:07:32 -07:00
526 lines
12 KiB
TypeScript
526 lines
12 KiB
TypeScript
import type {
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ICredentialTestFunctions,
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ICredentialsDecrypted,
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IDataObject,
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IExecuteFunctions,
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INodeCredentialTestResult,
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INodeExecutionData,
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INodeType,
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INodeTypeDescription,
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} from 'n8n-workflow';
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import { BINARY_ENCODING, NodeOperationError } from 'n8n-workflow';
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import { rm, writeFile } from 'fs/promises';
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import { file as tmpFile } from 'tmp-promise';
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import type { Config } from 'node-ssh';
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import { NodeSSH } from 'node-ssh';
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import type { Readable } from 'stream';
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async function resolveHomeDir(
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this: IExecuteFunctions,
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path: string,
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ssh: NodeSSH,
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itemIndex: number,
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) {
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if (path.startsWith('~/')) {
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let homeDir = (await ssh.execCommand('echo $HOME')).stdout;
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if (homeDir.charAt(homeDir.length - 1) !== '/') {
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homeDir += '/';
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}
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return path.replace('~/', homeDir);
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}
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if (path.startsWith('~')) {
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throw new NodeOperationError(
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this.getNode(),
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'Invalid path. Replace "~" with home directory or "~/"',
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{
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itemIndex,
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},
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);
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}
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return path;
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}
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function sanitizePrivateKey(privateKey: string) {
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const [openSshKey, bodySshKey, endSshKey] = privateKey
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.split('-----')
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.filter((item) => item !== '');
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return `-----${openSshKey}-----\n${bodySshKey.replace(/ /g, '\n')}\n-----${endSshKey}-----`;
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}
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export class Ssh implements INodeType {
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description: INodeTypeDescription = {
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displayName: 'SSH',
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name: 'ssh',
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icon: 'fa:terminal',
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group: ['input'],
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version: 1,
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subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
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description: 'Execute commands via SSH',
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defaults: {
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name: 'SSH',
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color: '#000000',
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},
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inputs: ['main'],
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outputs: ['main'],
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credentials: [
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{
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name: 'sshPassword',
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required: true,
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testedBy: 'sshConnectionTest',
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displayOptions: {
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show: {
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authentication: ['password'],
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},
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},
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},
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{
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name: 'sshPrivateKey',
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required: true,
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testedBy: 'sshConnectionTest',
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displayOptions: {
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show: {
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authentication: ['privateKey'],
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},
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},
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},
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],
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properties: [
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{
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displayName: 'Authentication',
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name: 'authentication',
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type: 'options',
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options: [
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{
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name: 'Password',
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value: 'password',
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},
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{
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name: 'Private Key',
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value: 'privateKey',
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},
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],
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default: 'password',
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},
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{
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displayName: 'Resource',
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name: 'resource',
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type: 'options',
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noDataExpression: true,
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options: [
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{
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name: 'Command',
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value: 'command',
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},
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{
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name: 'File',
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value: 'file',
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},
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],
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default: 'command',
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},
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'options',
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noDataExpression: true,
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displayOptions: {
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show: {
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resource: ['command'],
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},
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},
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options: [
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{
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name: 'Execute',
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value: 'execute',
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description: 'Execute a command',
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action: 'Execute a command',
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},
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],
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default: 'execute',
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},
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{
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displayName: 'Command',
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name: 'command',
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type: 'string',
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displayOptions: {
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show: {
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resource: ['command'],
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operation: ['execute'],
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},
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},
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default: '',
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description: 'The command to be executed on a remote device',
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},
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{
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displayName: 'Working Directory',
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name: 'cwd',
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type: 'string',
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displayOptions: {
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show: {
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resource: ['command'],
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operation: ['execute'],
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},
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},
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default: '/',
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required: true,
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},
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'options',
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noDataExpression: true,
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displayOptions: {
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show: {
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resource: ['file'],
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},
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},
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options: [
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{
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name: 'Download',
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value: 'download',
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description: 'Download a file',
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action: 'Download a file',
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},
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{
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name: 'Upload',
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value: 'upload',
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description: 'Upload a file',
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action: 'Upload a file',
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},
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],
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default: 'upload',
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},
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{
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displayName: 'Binary Property',
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name: 'binaryPropertyName',
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type: 'string',
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default: 'data',
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required: true,
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displayOptions: {
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show: {
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operation: ['upload'],
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resource: ['file'],
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},
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},
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placeholder: '',
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description:
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'Name of the binary property which contains the data for the file to be uploaded',
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},
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{
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displayName: 'Target Directory',
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name: 'path',
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type: 'string',
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displayOptions: {
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show: {
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resource: ['file'],
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operation: ['upload'],
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},
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},
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default: '',
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required: true,
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placeholder: '/home/user',
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description:
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'The directory to upload the file to. The name of the file does not need to be specified, it\'s taken from the binary data file name. To override this behavior, set the parameter "File Name" under options.',
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},
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{
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displayName: 'Path',
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displayOptions: {
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show: {
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resource: ['file'],
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operation: ['download'],
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},
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},
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name: 'path',
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type: 'string',
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default: '',
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placeholder: '/home/user/invoice.txt',
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description:
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'The file path of the file to download. Has to contain the full path including file name.',
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required: true,
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},
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{
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displayName: 'Binary Property',
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displayOptions: {
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show: {
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resource: ['file'],
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operation: ['download'],
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},
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},
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name: 'binaryPropertyName',
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type: 'string',
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default: 'data',
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description: 'Object property name which holds binary data',
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required: true,
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},
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{
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displayName: 'Options',
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name: 'options',
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type: 'collection',
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placeholder: 'Add Option',
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displayOptions: {
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show: {
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resource: ['file'],
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operation: ['upload', 'download'],
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},
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},
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default: {},
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options: [
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{
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displayName: 'File Name',
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name: 'fileName',
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type: 'string',
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default: '',
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description: 'Overrides the binary data file name',
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},
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],
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},
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],
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};
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methods = {
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credentialTest: {
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async sshConnectionTest(
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this: ICredentialTestFunctions,
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credential: ICredentialsDecrypted,
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): Promise<INodeCredentialTestResult> {
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const credentials = credential.data as IDataObject;
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const ssh = new NodeSSH();
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const temporaryFiles: string[] = [];
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try {
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if (!credentials.privateKey) {
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await ssh.connect({
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host: credentials.host as string,
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username: credentials.username as string,
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port: credentials.port as number,
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password: credentials.password as string,
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});
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} else {
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const { path } = await tmpFile({ prefix: 'n8n-ssh-' });
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temporaryFiles.push(path);
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await writeFile(path, sanitizePrivateKey(credentials.privateKey as string));
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const options: Config = {
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host: credentials.host as string,
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username: credentials.username as string,
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port: credentials.port as number,
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privateKey: path,
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};
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if (credentials.passphrase) {
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options.passphrase = credentials.passphrase as string;
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}
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await ssh.connect(options);
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}
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} catch (error) {
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const message = `SSH connection failed: ${error.message}`;
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return {
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status: 'Error',
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message,
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};
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} finally {
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ssh.dispose();
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for (const tempFile of temporaryFiles) await rm(tempFile);
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}
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return {
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status: 'OK',
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message: 'Connection successful!',
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};
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},
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},
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};
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async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
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const items = this.getInputData();
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const returnItems: INodeExecutionData[] = [];
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const resource = this.getNodeParameter('resource', 0);
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const operation = this.getNodeParameter('operation', 0);
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const authentication = this.getNodeParameter('authentication', 0) as string;
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const temporaryFiles: string[] = [];
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const ssh = new NodeSSH();
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try {
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if (authentication === 'password') {
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const credentials = await this.getCredentials('sshPassword');
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await ssh.connect({
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host: credentials.host as string,
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username: credentials.username as string,
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port: credentials.port as number,
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password: credentials.password as string,
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});
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} else if (authentication === 'privateKey') {
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const credentials = await this.getCredentials('sshPrivateKey');
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const { path } = await tmpFile({ prefix: 'n8n-ssh-' });
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temporaryFiles.push(path);
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await writeFile(path, sanitizePrivateKey(credentials.privateKey as string));
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const options: Config = {
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host: credentials.host as string,
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username: credentials.username as string,
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port: credentials.port as number,
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privateKey: path,
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};
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if (credentials.passphrase) {
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options.passphrase = credentials.passphrase as string;
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}
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await ssh.connect(options);
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}
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for (let i = 0; i < items.length; i++) {
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try {
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if (resource === 'command') {
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if (operation === 'execute') {
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const command = this.getNodeParameter('command', i) as string;
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const cwd = await resolveHomeDir.call(
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this,
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this.getNodeParameter('cwd', i) as string,
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ssh,
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i,
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);
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returnItems.push({
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json: (await ssh.execCommand(command, { cwd })) as unknown as IDataObject,
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pairedItem: {
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item: i,
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},
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});
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}
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}
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if (resource === 'file') {
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if (operation === 'download') {
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const dataPropertyNameDownload = this.getNodeParameter('binaryPropertyName', i);
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const parameterPath = await resolveHomeDir.call(
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this,
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this.getNodeParameter('path', i) as string,
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ssh,
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i,
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);
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const { path } = await tmpFile({ prefix: 'n8n-ssh-' });
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temporaryFiles.push(path);
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await ssh.getFile(path, parameterPath);
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const newItem: INodeExecutionData = {
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json: items[i].json,
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binary: {},
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pairedItem: {
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item: i,
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},
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};
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if (items[i].binary !== undefined && newItem.binary) {
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// Create a shallow copy of the binary data so that the old
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// data references which do not get changed still stay behind
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// but the incoming data does not get changed.
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Object.assign(newItem.binary, items[i].binary);
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}
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items[i] = newItem;
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const fileName = this.getNodeParameter('options.fileName', i, '') as string;
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items[i].binary![dataPropertyNameDownload] = await this.nodeHelpers.copyBinaryFile(
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path,
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fileName || parameterPath,
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);
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}
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if (operation === 'upload') {
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const parameterPath = await resolveHomeDir.call(
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this,
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this.getNodeParameter('path', i) as string,
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ssh,
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i,
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);
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const fileName = this.getNodeParameter('options.fileName', i, '') as string;
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const binaryPropertyName = this.getNodeParameter('binaryPropertyName', i);
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const binaryData = this.helpers.assertBinaryData(i, binaryPropertyName);
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let uploadData: Buffer | Readable;
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if (binaryData.id) {
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uploadData = this.helpers.getBinaryStream(binaryData.id);
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} else {
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uploadData = Buffer.from(binaryData.data, BINARY_ENCODING);
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}
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const { path } = await tmpFile({ prefix: 'n8n-ssh-' });
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temporaryFiles.push(path);
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await writeFile(path, uploadData);
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await ssh.putFile(
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path,
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`${parameterPath}${
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parameterPath.charAt(parameterPath.length - 1) === '/' ? '' : '/'
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}${fileName || binaryData.fileName}`,
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);
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returnItems.push({
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json: {
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success: true,
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},
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pairedItem: {
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item: i,
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},
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});
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}
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}
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} catch (error) {
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if (this.continueOnFail()) {
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if (resource === 'file' && operation === 'download') {
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items[i] = {
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json: {
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error: error.message,
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},
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};
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} else {
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returnItems.push({
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json: {
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error: error.message,
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},
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pairedItem: {
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item: i,
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},
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});
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}
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continue;
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}
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throw error;
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}
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}
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} catch (error) {
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ssh.dispose();
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for (const tempFile of temporaryFiles) await rm(tempFile);
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throw error;
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}
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for (const tempFile of temporaryFiles) await rm(tempFile);
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ssh.dispose();
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if (resource === 'file' && operation === 'download') {
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// For file downloads the files get attached to the existing items
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return this.prepareOutputData(items);
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} else {
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return this.prepareOutputData(returnItems);
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}
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}
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}
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