バージョン: v2

Filesystem

The Filesystem API provides a NodeJS-like API for working with files on the device.

readFile(...)
writeFile(...)
appendFile(...)
deleteFile(...)
mkdir(...)
rmdir(...)
readdir(...)
getUri(...)
stat(...)
rename(...)
copy(...)
Interfaces
Enums

Understanding Directories and Files

iOS and Android have additional layers of separation between files, such as special directories that are backed up to the Cloud, or ones for storing Documents. The Filesystem API offers a simple way to scope each operation to a specific special directory on the device.

Additionally, the Filesystem API supports using full file:// paths, or reading content:// files on Android. Simply leave out the directory param to use a full file path.

Example

import { Plugins, FilesystemDirectory, FilesystemEncoding } from '@capacitor/core';

const { Filesystem } = Plugins;

async fileWrite() {
  try {
    const result = await Filesystem.writeFile({
      path: 'secrets/text.txt',
      data: "This is a test",
      directory: FilesystemDirectory.Documents,
      encoding: FilesystemEncoding.UTF8
    })
    console.log('Wrote file', result);
  } catch(e) {
    console.error('Unable to write file', e);
  }
}

async fileRead() {
  let contents = await Filesystem.readFile({
    path: 'secrets/text.txt',
    directory: FilesystemDirectory.Documents,
    encoding: FilesystemEncoding.UTF8
  });
  console.log(contents);
}

async fileAppend() {
  await Filesystem.appendFile({
    path: 'secrets/text.txt',
    data: "MORE TESTS",
    directory: FilesystemDirectory.Documents,
    encoding: FilesystemEncoding.UTF8
  });
}

async fileDelete() {
  await Filesystem.deleteFile({
    path: 'secrets/text.txt',
    directory: FilesystemDirectory.Documents
  });
}

async mkdir() {
  try {
    let ret = await Filesystem.mkdir({
      path: 'secrets',
      directory: FilesystemDirectory.Documents,
      recursive: false // like mkdir -p
    });
  } catch(e) {
    console.error('Unable to make directory', e);
  }
}

async rmdir() {
  try {
    let ret = await Filesystem.rmdir({
      path: 'secrets',
      directory: FilesystemDirectory.Documents,
      recursive: false,
    });
  } catch(e) {
    console.error('Unable to remove directory', e);
  }
}

async readdir() {
  try {
    let ret = await Filesystem.readdir({
      path: 'secrets',
      directory: FilesystemDirectory.Documents
    });
  } catch(e) {
    console.error('Unable to read dir', e);
  }
}

async stat() {
  try {
    let ret = await Filesystem.stat({
      path: 'secrets/text.txt',
      directory: FilesystemDirectory.Documents
    });
  } catch(e) {
    console.error('Unable to stat file', e);
  }
}

async readFilePath() {
  // Here's an example of reading a file with a full file path. Use this to
  // read binary data (base64 encoded) from plugins that return File URIs, such as
  // the Camera.
  try {
    let data = await Filesystem.readFile({
      path: 'file:///var/mobile/Containers/Data/Application/22A433FD-D82D-4989-8BE6-9FC49DEA20BB/Documents/text.txt'
    })
  }
}

async rename() {
  try {
    // This example moves the file within the same 'directory'
    let ret = await Filesystem.rename({
      from: 'text.txt',
      to: 'text2.txt',
      directory: FilesystemDirectory.Documents
    });
  } catch(e) {
    console.error('Unable to rename file', e);
  }
}

async copy() {
  try {
    // This example copies a file within the documents directory
    let ret = await Filesystem.copy({
      from: 'text.txt',
      to: 'text2.txt',
      directory: FilesystemDirectory.Documents
    });
  } catch(e) {
    console.error('Unable to copy file', e);
  }
}

API

readFile(...)

readFile(options: FileReadOptions) => Promise<FileReadResult>

Read a file from disk

Param	Type	Description
`options`	`FileReadOptions`	options for the file read

Returns:

Promise<FileReadResult>

writeFile(...)

writeFile(options: FileWriteOptions) => Promise<FileWriteResult>

Write a file to disk in the specified location on device

Param	Type	Description
`options`	`FileWriteOptions`	options for the file write

Returns:

Promise<FileWriteResult>

appendFile(...)

appendFile(options: FileAppendOptions) => Promise<FileAppendResult>

Append to a file on disk in the specified location on device

Param	Type	Description
`options`	`FileAppendOptions`	options for the file append

Returns:

Promise<FileAppendResult>

deleteFile(...)

deleteFile(options: FileDeleteOptions) => Promise<FileDeleteResult>

Delete a file from disk

Param	Type	Description
`options`	`FileDeleteOptions`	options for the file delete

Returns:

Promise<FileDeleteResult>

mkdir(...)

mkdir(options: MkdirOptions) => Promise<MkdirResult>

Create a directory.

Param	Type	Description
`options`	`MkdirOptions`	options for the mkdir

Returns:

Promise<MkdirResult>

rmdir(...)

rmdir(options: RmdirOptions) => Promise<RmdirResult>

Remove a directory

Param	Type	Description
`options`	`RmdirOptions`	the options for the directory remove

Returns:

Promise<RmdirResult>

readdir(...)

readdir(options: ReaddirOptions) => Promise<ReaddirResult>

Return a list of files from the directory (not recursive)

Param	Type	Description
`options`	`ReaddirOptions`	the options for the readdir operation

Returns:

Promise<ReaddirResult>

getUri(...)

getUri(options: GetUriOptions) => Promise<GetUriResult>

Return full File URI for a path and directory

Param	Type	Description
`options`	`GetUriOptions`	the options for the stat operation

Returns:

Promise<GetUriResult>

stat(...)

stat(options: StatOptions) => Promise<StatResult>

Return data about a file

Param	Type	Description
`options`	`StatOptions`	the options for the stat operation

Returns:

Promise<StatResult>

rename(...)

rename(options: RenameOptions) => Promise<RenameResult>

Rename a file or directory

Param	Type	Description
`options`	`RenameOptions`	the options for the rename operation

Returns:

Promise<RenameResult>

copy(...)

copy(options: CopyOptions) => Promise<CopyResult>

Copy a file or directory

Param	Type	Description
`options`	`CopyOptions`	the options for the copy operation

Returns:

Promise<CopyResult>

Interfaces

FileReadResult

Prop	Type
`data`	`string`

FileReadOptions

Prop	Type	Description
`path`	`string`	The filename to read
`directory`	`FilesystemDirectory`	The FilesystemDirectory to read the file from
`encoding`	`FilesystemEncoding`	The encoding to read the file in, if not provided, data is read as binary and returned as base64 encoded data. Pass FilesystemEncoding.UTF8 to read data as string

FileWriteResult

Prop	Type
`uri`	`string`

FileWriteOptions

Prop	Type	Description
`path`	`string`	The filename to write
`data`	`string`	The data to write
`directory`	`FilesystemDirectory`	The FilesystemDirectory to store the file in
`encoding`	`FilesystemEncoding`	The encoding to write the file in. If not provided, data is written as base64 encoded data. Pass FilesystemEncoding.UTF8 to write data as string
`recursive`	`boolean`	Whether to create any missing parent directories. Defaults to false

FileAppendResult

FileAppendOptions

Prop	Type	Description
`path`	`string`	The filename to write
`data`	`string`	The data to write
`directory`	`FilesystemDirectory`	The FilesystemDirectory to store the file in
`encoding`	`FilesystemEncoding`	The encoding to write the file in. If not provided, data is written as base64 encoded data. Pass FilesystemEncoding.UTF8 to write data as string

FileDeleteResult

FileDeleteOptions

Prop	Type	Description
`path`	`string`	The filename to delete
`directory`	`FilesystemDirectory`	The FilesystemDirectory to delete the file from

MkdirResult

MkdirOptions

Prop	Type	Description
`path`	`string`	The path of the new directory
`directory`	`FilesystemDirectory`	The FilesystemDirectory to make the new directory in
`recursive`	`boolean`	Whether to create any missing parent directories as well. Defaults to false

RmdirResult

RmdirOptions

Prop	Type	Description
`path`	`string`	The path of the directory to remove
`directory`	`FilesystemDirectory`	The FilesystemDirectory to remove the directory from
`recursive`	`boolean`	Whether to recursively remove the contents of the directory Defaults to false

ReaddirResult

Prop	Type
`files`	`string[]`

ReaddirOptions

Prop	Type	Description
`path`	`string`	The path of the directory to read
`directory`	`FilesystemDirectory`	The FilesystemDirectory to list files from

GetUriResult

Prop	Type
`uri`	`string`

GetUriOptions

Prop	Type	Description
`path`	`string`	The path of the file to get the URI for
`directory`	`FilesystemDirectory`	The FilesystemDirectory to get the file under

StatResult

Prop	Type
`type`	`string`
`size`	`number`
`ctime`	`number`
`mtime`	`number`
`uri`	`string`

StatOptions

Prop	Type	Description
`path`	`string`	The path of the file to get data about
`directory`	`FilesystemDirectory`	The FilesystemDirectory to get the file under

RenameResult

RenameOptions

CopyResult

CopyOptions

Prop	Type	Description
`from`	`string`	The existing file or directory
`to`	`string`	The destination file or directory
`directory`	`FilesystemDirectory`	The FilesystemDirectory containing the existing file or directory
`toDirectory`	`FilesystemDirectory`	The FilesystemDirectory containing the destination file or directory. If not supplied will use the 'directory' parameter as the destination

Enums

FilesystemDirectory

Members	Value	Description
`Documents`	`"DOCUMENTS"`	The Documents directory On iOS it's the app's documents directory. Use this directory to store user-generated content. On Android it's the Public Documents folder, so it's accessible from other apps. It's not accesible on Android 10 unless the app enables legacy External Storage by adding `android:requestLegacyExternalStorage="true"` in the `application` tag in the `AndroidManifest.xml`
`Data`	`"DATA"`	The Data directory On iOS it will use the Documents directory On Android it's the directory holding application files. Files will be deleted when the application is uninstalled.
`Cache`	`"CACHE"`	The Cache directory Can be deleted in cases of low memory, so use this directory to write app-specific files that your app can re-create easily.
`External`	`"EXTERNAL"`	The external directory On iOS it will use the Documents directory On Android it's the directory on the primary shared/external storage device where the application can place persistent files it owns. These files are internal to the applications, and not typically visible to the user as media. Files will be deleted when the application is uninstalled.
`ExternalStorage`	`"EXTERNAL_STORAGE"`	The external storage directory On iOS it will use the Documents directory On Android it's the primary shared/external storage directory. It's not accesible on Android 10 unless the app enables legacy External Storage by adding `android:requestLegacyExternalStorage="true"` in the `application` tag in the `AndroidManifest.xml`

FilesystemEncoding

Members	Value
`UTF8`	`"utf8"`
`ASCII`	`"ascii"`
`UTF16`	`"utf16"`

Understanding Directories and Files​

Example​

API​

readFile(...)​

writeFile(...)​

appendFile(...)​

deleteFile(...)​

mkdir(...)​

rmdir(...)​

readdir(...)​

getUri(...)​

stat(...)​

rename(...)​

copy(...)​

Interfaces​

FileReadResult​

FileReadOptions​

FileWriteResult​

FileWriteOptions​

FileAppendResult​

FileAppendOptions​

FileDeleteResult​

FileDeleteOptions​

MkdirResult​

MkdirOptions​

RmdirResult​

RmdirOptions​

ReaddirResult​

ReaddirOptions​

GetUriResult​

GetUriOptions​

StatResult​

StatOptions​

RenameResult​

RenameOptions​

CopyResult​

CopyOptions​

Enums​

FilesystemDirectory​

FilesystemEncoding​

Contents

Understanding Directories and Files

Example

API

readFile(...)

writeFile(...)

appendFile(...)

deleteFile(...)

mkdir(...)

rmdir(...)

readdir(...)

getUri(...)

stat(...)

rename(...)

copy(...)

Interfaces

FileReadResult

FileReadOptions

FileWriteResult

FileWriteOptions

FileAppendResult

FileAppendOptions

FileDeleteResult

FileDeleteOptions

MkdirResult

MkdirOptions

RmdirResult

RmdirOptions

ReaddirResult

ReaddirOptions

GetUriResult

GetUriOptions

StatResult

StatOptions

RenameResult

RenameOptions

CopyResult

CopyOptions

Enums

FilesystemDirectory

FilesystemEncoding