Be able to abort asynchronous operations

core.d.ts

@@ -489,7 +489,7 @@ export function fileTypeStream(webStream: AnyWebReadableStream<Uint8Array>, opti
 export declare class FileTypeParser {
 	detectors: Iterable<Detector>;
 
-	constructor(options?: {customDetectors?: Iterable<Detector>});
+	constructor(options?: {customDetectors?: Iterable<Detector>; abortSignal: AbortSignal});
 
 	/**
 	Works the same way as {@link fileTypeFromBuffer}, additionally taking into account custom detectors (if any were provided to the constructor).

core.js

@@ -58,7 +58,9 @@ export async function fileTypeStream(webStream, options) {
 export class FileTypeParser {
 	constructor(options) {
 		this.detectors = options?.customDetectors;
-
+		this.tokenizerOptions = {
+			abortSignal: options?.abortSignal,
+		};
 		this.fromTokenizer = this.fromTokenizer.bind(this);
 		this.fromBuffer = this.fromBuffer.bind(this);
 		this.parse = this.parse.bind(this);
@@ -92,15 +94,15 @@ export class FileTypeParser {
 			return;
 		}
 
-		return this.fromTokenizer(strtok3.fromBuffer(buffer));
+		return this.fromTokenizer(strtok3.fromBuffer(buffer, this.tokenizerOptions));
 	}
 
 	async fromBlob(blob) {
 		return this.fromStream(blob.stream());
 	}
 
 	async fromStream(stream) {
-		const tokenizer = await strtok3.fromWebStream(stream);
+		const tokenizer = await strtok3.fromWebStream(stream, this.tokenizerOptions);
 		try {
 			return await this.fromTokenizer(tokenizer);
 		} finally {

index.js

@@ -9,7 +9,7 @@ import {FileTypeParser, reasonableDetectionSizeInBytes} from './core.js';
 
 export class NodeFileTypeParser extends FileTypeParser {
 	async fromStream(stream) {
-		const tokenizer = await (stream instanceof WebReadableStream ? strtok3.fromWebStream(stream) : strtok3.fromStream(stream));
+		const tokenizer = await (stream instanceof WebReadableStream ? strtok3.fromWebStream(stream, this.tokenizerOptions) : strtok3.fromStream(stream, this.tokenizerOptions));
 		try {
 			return super.fromTokenizer(tokenizer);
 		} finally {

package.json

@@ -219,7 +219,7 @@
 	],
 	"dependencies": {
 		"get-stream": "^9.0.1",
-		"strtok3": "^8.1.0",
+		"strtok3": "^9.0.0",
 		"token-types": "^6.0.0",
 		"uint8array-extras": "^1.3.0"
 	},
@@ -252,5 +252,6 @@
 	},
 	"ava": {
 		"serial": true
-	}
+	},
+	"packageManager": "[email protected]+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e"
 }

readme.md

@@ -367,6 +367,22 @@ const fileType = await parser.fromBuffer(buffer);
 console.log(fileType);
 ```
 
+## Abort signal
+
+Some asynchronous operations can be aborted by passing the [AbortSignal](https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal) interface to the `FileTypeParser` constructor.
+
+```js
+import {FileTypeParser} from 'file-type'; // or `NodeFileTypeParser` in Node.js
+
+const abortController = new AbortController()
+
+const parser = new FileTypeParser({abortSignal: abortController.signal});
+
+const promise = parser.fromStream(blob.stream());
+
+abortController.abort(); // Abort file-type reading from the Blob stream.
+```
+
 ## Supported file types
 
 - [`3g2`](https://en.wikipedia.org/wiki/3GP_and_3G2#3G2) - Multimedia container format defined by the 3GPP2 for 3G CDMA2000 multimedia services