n8n/packages/nodes-base/nodes/Compression/Compression.node.ts
Iván Ovejero 62c096710f
refactor: Run lintfix (no-changelog) (#7537)
- Fix autofixable violations
- Remove unused directives
- Allow for PascalCased variables - needed for dynamically imported or
assigned classes, decorators, routers, etc.
2023-10-27 14:15:02 +02:00

326 lines
7.6 KiB
TypeScript

import { promisify } from 'util';
import type {
IBinaryKeyData,
IExecuteFunctions,
INodeExecutionData,
INodeType,
INodeTypeDescription,
} from 'n8n-workflow';
import * as fflate from 'fflate';
const gunzip = promisify(fflate.gunzip);
const gzip = promisify(fflate.gzip);
const unzip = promisify(fflate.unzip);
const zip = promisify(fflate.zip);
import * as mime from 'mime-types';
const ALREADY_COMPRESSED = [
'7z',
'aifc',
'bz2',
'doc',
'docx',
'gif',
'gz',
'heic',
'heif',
'jpg',
'jpeg',
'mov',
'mp3',
'mp4',
'pdf',
'png',
'ppt',
'pptx',
'rar',
'webm',
'webp',
'xls',
'xlsx',
'zip',
];
export class Compression implements INodeType {
description: INodeTypeDescription = {
displayName: 'Compression',
name: 'compression',
icon: 'fa:file-archive',
group: ['transform'],
subtitle: '={{$parameter["operation"]}}',
version: 1,
description: 'Compress and decompress files',
defaults: {
name: 'Compression',
color: '#408000',
},
inputs: ['main'],
outputs: ['main'],
properties: [
{
displayName: 'Operation',
name: 'operation',
type: 'options',
noDataExpression: true,
options: [
{
name: 'Compress',
value: 'compress',
},
{
name: 'Decompress',
value: 'decompress',
},
],
default: 'decompress',
},
{
displayName: 'Binary Property',
name: 'binaryPropertyName',
type: 'string',
default: 'data',
required: true,
displayOptions: {
show: {
operation: ['compress', 'decompress'],
},
},
placeholder: '',
description:
'Name of the binary property which contains the data for the file(s) to be compress/decompress. Multiple can be used separated by a comma (,).',
},
{
displayName: 'Output Format',
name: 'outputFormat',
type: 'options',
default: '',
options: [
{
name: 'Gzip',
value: 'gzip',
},
{
name: 'Zip',
value: 'zip',
},
],
displayOptions: {
show: {
operation: ['compress'],
},
},
description: 'Format of the output file',
},
{
displayName: 'File Name',
name: 'fileName',
type: 'string',
default: '',
placeholder: 'data.zip',
required: true,
displayOptions: {
show: {
operation: ['compress'],
outputFormat: ['zip'],
},
},
description: 'Name of the file to be compressed',
},
{
displayName: 'Binary Property Output',
name: 'binaryPropertyOutput',
type: 'string',
default: 'data',
displayOptions: {
show: {
outputFormat: ['zip'],
operation: ['compress'],
},
},
placeholder: '',
description:
'Name of the binary property to which to write the data of the compressed files',
},
{
displayName: 'Output Prefix',
name: 'outputPrefix',
type: 'string',
default: 'data',
required: true,
displayOptions: {
show: {
operation: ['compress'],
outputFormat: ['gzip'],
},
},
description: 'Prefix use for all gzip compressed files',
},
{
displayName: 'Output Prefix',
name: 'outputPrefix',
type: 'string',
default: 'file_',
required: true,
displayOptions: {
show: {
operation: ['decompress'],
},
},
description: 'Prefix use for all decompressed files',
},
],
};
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
const items = this.getInputData();
const length = items.length;
const returnData: INodeExecutionData[] = [];
const operation = this.getNodeParameter('operation', 0);
for (let i = 0; i < length; i++) {
try {
if (operation === 'decompress') {
const binaryPropertyNames = this.getNodeParameter('binaryPropertyName', 0)
.split(',')
.map((key) => key.trim());
const outputPrefix = this.getNodeParameter('outputPrefix', 0) as string;
const binaryObject: IBinaryKeyData = {};
let zipIndex = 0;
for (const [index, binaryPropertyName] of binaryPropertyNames.entries()) {
const binaryData = this.helpers.assertBinaryData(i, binaryPropertyName);
const binaryDataBuffer = await this.helpers.getBinaryDataBuffer(i, binaryPropertyName);
if (binaryData.fileExtension?.toLowerCase() === 'zip') {
const files = await unzip(binaryDataBuffer);
for (const key of Object.keys(files)) {
// when files are compressed using MACOSX for some reason they are duplicated under __MACOSX
if (key.includes('__MACOSX')) {
continue;
}
const data = await this.helpers.prepareBinaryData(
Buffer.from(files[key].buffer),
key,
);
binaryObject[`${outputPrefix}${zipIndex++}`] = data;
}
} else if (binaryData.fileExtension?.toLowerCase() === 'gz') {
const file = await gunzip(binaryDataBuffer);
const fileName = binaryData.fileName?.split('.')[0];
const propertyName = `${outputPrefix}${index}`;
binaryObject[propertyName] = await this.helpers.prepareBinaryData(
Buffer.from(file.buffer),
fileName,
);
const fileExtension = mime.extension(binaryObject[propertyName].mimeType) as string;
binaryObject[propertyName].fileName = `${fileName}.${fileExtension}`;
binaryObject[propertyName].fileExtension = fileExtension;
}
}
returnData.push({
json: items[i].json,
binary: binaryObject,
pairedItem: {
item: i,
},
});
}
if (operation === 'compress') {
const binaryPropertyNames = this.getNodeParameter('binaryPropertyName', 0)
.split(',')
.map((key) => key.trim());
const outputFormat = this.getNodeParameter('outputFormat', 0) as string;
const zipData: fflate.Zippable = {};
const binaryObject: IBinaryKeyData = {};
for (const [index, binaryPropertyName] of binaryPropertyNames.entries()) {
const binaryData = this.helpers.assertBinaryData(i, binaryPropertyName);
const binaryDataBuffer = await this.helpers.getBinaryDataBuffer(i, binaryPropertyName);
if (outputFormat === 'zip') {
zipData[binaryData.fileName as string] = [
binaryDataBuffer,
{
level: ALREADY_COMPRESSED.includes(binaryData.fileExtension as string) ? 0 : 6,
},
];
} else if (outputFormat === 'gzip') {
const outputPrefix = this.getNodeParameter('outputPrefix', 0) as string;
const data = await gzip(binaryDataBuffer);
const fileName = binaryData.fileName?.split('.')[0];
binaryObject[`${outputPrefix}${index}`] = await this.helpers.prepareBinaryData(
Buffer.from(data),
`${fileName}.gzip`,
);
}
}
if (outputFormat === 'zip') {
const fileName = this.getNodeParameter('fileName', 0) as string;
const binaryPropertyOutput = this.getNodeParameter('binaryPropertyOutput', 0);
const buffer = await zip(zipData);
const data = await this.helpers.prepareBinaryData(Buffer.from(buffer), fileName);
returnData.push({
json: items[i].json,
binary: {
[binaryPropertyOutput]: data,
},
pairedItem: {
item: i,
},
});
}
if (outputFormat === 'gzip') {
returnData.push({
json: items[i].json,
binary: binaryObject,
pairedItem: {
item: i,
},
});
}
}
} catch (error) {
if (this.continueOnFail()) {
returnData.push({
json: {
error: error.message,
},
pairedItem: {
item: i,
},
});
continue;
}
throw error;
}
}
return [returnData];
}
}