FileIOWeb class

Web platform implementation using File System Access API Works on: Chrome 86+, Edge 86+, Opera 72+ (modern browsers only)

Note: This implementation requires user interaction to pick files. For web, "filePath" is interpreted as:

• "picker" or null: Prompt user to pick a file
• Valid File object reference: Use that file directly

Implemented types

• FileIO

Constructors

FileIOWeb()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

clearCache() → void

Clear the file cache

computeFileHash(String filePath) → Stream<FileHashProgress>

Computes SHA256 hash of a file by reading it in chunks Returns stream updates with progress and a final event containing FileHashProgress.hash

override

downloadToUser(String filename, Uint8List data) → Future<void>

Download a file to the user's downloads folder using browser download This is the web equivalent of saving to a file path

fileExists(String filePath) → Future<bool>

Checks if a file exists at the given path

override

getFileSize(String filePath) → Future<int>

Gets the size of a file in bytes

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

readFile(String filePath) → Future<Uint8List>

Reads entire file into memory as Uint8List

override

readFileAsStream(String filePath, {int chunkSize = 8192}) → Stream<Uint8List>

Reads a file in chunks and returns a stream of bytes chunkSize determines the size of each chunk (default 8KB)

override

registerFile(String key, File file) → void

Register an existing File object with a key Useful when you already have a file from a file picker

toString() → String

A string representation of this object.

inherited

writeFile(String filePath, Uint8List data) → Future<void>

Writes bytes to a file at the given path Creates the file if it doesn't exist, overwrites if it does

override

writeFileStream(String filePath, Stream<Uint8List> dataStream) → Future<void>

Writes a stream of bytes to a file at the given path Creates the file if it doesn't exist, overwrites if it does

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited