fix(Convert to/from binary data Node): Better mime type defaults (#7693)

Github issue / Community forum post (link here to close automatically):

---------

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/nodes-base/nodes/MoveBinaryData/MoveBinaryData.node.ts

@@ -1,26 +1,19 @@
 import get from 'lodash/get';
 import set from 'lodash/set';
 import unset from 'lodash/unset';
-import prettyBytes from 'pretty-bytes';
 
 import type {
 	IExecuteFunctions,
-	IBinaryData,
 	IDataObject,
 	INodeExecutionData,
 	INodePropertyOptions,
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import {
-	BINARY_ENCODING,
-	deepCopy,
-	jsonParse,
-	NodeOperationError,
-	fileTypeFromMimeType,
-} from 'n8n-workflow';
+import { BINARY_ENCODING, deepCopy, jsonParse, NodeOperationError } from 'n8n-workflow';
 
 import iconv from 'iconv-lite';
+
 iconv.encodingExists('utf8');
 
 // Create options for bomAware and encoding
@@ -53,7 +46,7 @@ export class MoveBinaryData implements INodeType {
 		name: 'moveBinaryData',
 		icon: 'fa:exchange-alt',
 		group: ['transform'],
-		version: 1,
+		version: [1, 1.1],
 		subtitle: '={{$parameter["mode"]==="binaryToJson" ? "Binary to JSON" : "JSON to Binary"}}',
 		description: 'Move data between binary and JSON properties',
 		defaults: {
@@ -326,9 +319,7 @@ export class MoveBinaryData implements INodeType {
 
 	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
 		const items = this.getInputData();
-
 		const mode = this.getNodeParameter('mode', 0) as string;
-
 		const returnData: INodeExecutionData[] = [];
 
 		let item: INodeExecutionData;
@@ -421,29 +412,39 @@ export class MoveBinaryData implements INodeType {
 					newItem.binary = {};
 				}
 
-				const mimeType = (options.mimeType as string) || 'application/json';
-				const convertedValue: IBinaryData = {
-					data: '',
-					mimeType,
-					fileType: fileTypeFromMimeType(mimeType),
-				};
+				const nodeVersion = this.getNode().typeVersion;
+				let mimeType = options.mimeType as string;
 
+				let data: Buffer;
 				if (options.dataIsBase64 !== true) {
 					if (options.useRawData !== true || typeof value === 'object') {
 						value = JSON.stringify(value);
+
+						if (!mimeType) {
+							mimeType = 'application/json';
+						}
 					}
 
-					convertedValue.fileSize = prettyBytes(value.length);
-
-					convertedValue.data = iconv
-						.encode(value, encoding, { addBOM: options.addBOM as boolean })
-						.toString(BINARY_ENCODING);
+					data = iconv.encode(value, encoding, { addBOM: options.addBOM as boolean });
 				} else {
-					convertedValue.data = value as unknown as string;
+					data = Buffer.from(value as unknown as string, BINARY_ENCODING);
 				}
 
-				if (options.fileName) {
-					convertedValue.fileName = options.fileName as string;
+				if (!mimeType && nodeVersion === 1) {
+					mimeType = 'application/json';
+				}
+
+				const convertedValue = await this.helpers.prepareBinaryData(
+					data,
+					options.fileName as string,
+					mimeType,
+				);
+
+				if (!convertedValue.fileName && nodeVersion > 1) {
+					const fileExtension = convertedValue.fileExtension
+						? `.${convertedValue.fileExtension}`
+						: '';
+					convertedValue.fileName = `file${fileExtension}`;
 				}
 
 				set(newItem.binary, destinationKey, convertedValue);

packages/nodes-base/nodes/MoveBinaryData/test/MoveBinaryData.test.ts

@@ -84,6 +84,7 @@ describe('Test Move Binary Data Node', () => {
 										mimeType: 'application/json',
 										fileType: 'json',
 										fileSize: '59 B',
+										fileExtension: 'json',
 									},
 								},
 							},
@@ -103,6 +104,7 @@ describe('Test Move Binary Data Node', () => {
 										fileType: 'json',
 										fileSize: '10 B',
 										fileName: 'example.json',
+										fileExtension: 'json',
 									},
 								},
 							},