n8n/packages/nodes-base/nodes/ReadBinaryFile.node.ts

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import { IExecuteSingleFunctions } from 'n8n-core';
import {
INodeExecutionData,
INodeTypeDescription,
INodeType,
} from 'n8n-workflow';
import {
readFile as fsReadFile,
} from 'fs';
import { promisify } from "util";
const fsReadFileAsync = promisify(fsReadFile);
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export class ReadBinaryFile implements INodeType {
description: INodeTypeDescription = {
displayName: 'Read Binary File',
name: 'readBinaryFile',
group: ['input'],
version: 1,
description: 'Reads a binary file from disk',
defaults: {
name: 'Read Binary File',
color: '#22CC33',
},
inputs: ['main'],
outputs: ['main'],
properties: [
{
displayName: 'File Path',
name: 'filePath',
type: 'string',
default: '',
required: true,
placeholder: '/data/example.jpg',
description: 'Path of the file to read.',
},
{
displayName: 'Property Name',
name: 'dataPropertyName',
type: 'string',
default: 'data',
required: true,
description: 'Name of the binary property to which to<br />write the data of the read file.',
},
]
};
async executeSingle(this: IExecuteSingleFunctions): Promise<INodeExecutionData> {
const item = this.getInputData();
const dataPropertyName = this.getNodeParameter('dataPropertyName') as string;
const filePath = this.getNodeParameter('filePath') as string;
if (item.binary === undefined) {
item.binary = {};
}
let data;
try {
data = await fsReadFileAsync(filePath) as Buffer;
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} catch (error) {
if (error.code === 'ENOENT') {
throw new Error(`The file "${filePath}" could not be found.`);
}
throw error;
}
item.binary[dataPropertyName] = await this.helpers.prepareBinaryData(data, filePath);
return item;
}
}