FileSystem

Provides file system operations within a Sandbox.

Constructors

new FileSystem()

new FileSystem(clientConfig: Configuration, apiClient: FileSystemApi): FileSystem

Parameters:

clientConfig Configuration
apiClient FileSystemApi

Returns:

FileSystem

Methods

createFolder()

createFolder(path: string, mode: string): Promise<void>

Create a new directory in the Sandbox with specified permissions.

Parameters:

path string - Path where the directory should be created. Relative paths are resolved based on the sandbox working directory.
mode string - Directory permissions in octal format (e.g. “755”)

Returns:

Promise<void>

Example:

// Create a directory with standard permissions
await fs.createFolder('app/data', '755');

deleteFile()

deleteFile(path: string, recursive?: boolean): Promise<void>

Deletes a file or directory from the Sandbox.

Parameters:

path string - Path to the file or directory to delete. Relative paths are resolved based on the sandbox working directory.
recursive? boolean - If the file is a directory, this must be true to delete it.

Returns:

Promise<void>

Example:

// Delete a file
await fs.deleteFile('app/temp.log');

downloadFile()

Call Signature

downloadFile(remotePath: string, timeout?: number): Promise<Buffer<ArrayBufferLike>>

Downloads a file from the Sandbox. This method loads the entire file into memory, so it is not recommended for downloading large files.

Parameters:

remotePath string - Path to the file to download. Relative paths are resolved based on the sandbox working directory.
timeout? number - Timeout for the download operation in seconds. 0 means no timeout. Default is 30 minutes.

Returns:

Promise<Buffer<ArrayBufferLike>> - The file contents as a Buffer.

Example:

// Download and process a file
const fileBuffer = await fs.downloadFile('tmp/data.json');
console.log('File content:', fileBuffer.toString());

Call Signature

downloadFile(
   remotePath: string,
   localPath: string,
timeout?: number): Promise<void>

Downloads a file from the Sandbox and saves it to a local file. This method uses streaming to download the file, so it is recommended for downloading larger files.

Parameters:

remotePath string - Path to the file to download in the Sandbox. Relative paths are resolved based on the sandbox working directory.
localPath string - Path to save the downloaded file.
timeout? number - Timeout for the download operation in seconds. 0 means no timeout. Default is 30 minutes.

Returns:

Promise<void>

Example:

// Download and save a file
await fs.downloadFile('tmp/data.json', 'local_file.json');

downloadFiles()

downloadFiles(files: FileDownloadRequest[], timeoutSec?: number): Promise<FileDownloadResponse[]>

Downloads multiple files from the Sandbox. If the files already exist locally, they will be overwritten.

Parameters:

files FileDownloadRequest[] - Array of file download requests.
timeoutSec? number = … - Timeout for the download operation in seconds. 0 means no timeout. Default is 30 minutes.

Returns:

Promise<FileDownloadResponse[]> - Array of download results.

Throws:

If the request itself fails (network issues, invalid request/response, etc.). Individual file download errors are returned in FileDownloadResponse.error. When the daemon provides structured per-file metadata, it is also available in FileDownloadResponse.errorDetails.

Example:

// Download multiple files
const results = await fs.downloadFiles([
  { source: 'tmp/data.json' },
  { source: 'tmp/config.json', destination: 'local_config.json' }
]);
results.forEach(result => {
  if (result.error) {
    console.error(`Error downloading ${result.source}: ${result.error}`);
  } else if (result.result) {
    console.log(`Downloaded ${result.source} to ${result.result}`);
  }
});

downloadFileStream()

Call Signature

downloadFileStream(remotePath: string, timeout?: number): Promise<Readable>

Downloads a single file from the Sandbox as a readable stream without buffering the entire file into memory. The returned stream can be piped directly to an HTTP response, a file write stream, or any other writable destination.

This method is only supported in Node.js-compatible runtimes (Node.js, Bun). Browser and serverless environments should use downloadFile instead.

Parameters:

remotePath string - Path to the file in the Sandbox. Relative paths are resolved based on the sandbox working directory.
timeout? number

Returns:

Promise<Readable> - A Node.js Readable stream of the file content.

Examples:

// Pipe directly to an HTTP response
const stream = await sandbox.fs.downloadFileStream('outputs/report.pdf');
stream.pipe(res);

// Download with progress tracking and cancellation
const controller = new AbortController();
const stream = await sandbox.fs.downloadFileStream('outputs/large-file.bin', {
  signal: controller.signal,
  onProgress: ({ bytesReceived, totalBytes }) => console.log(bytesReceived, totalBytes),
});
stream.pipe(createWriteStream('local-file.bin'));

Call Signature

downloadFileStream(remotePath: string, options?: DownloadStreamOptions): Promise<Readable>

This method is only supported in Node.js-compatible runtimes (Node.js, Bun). Browser and serverless environments should use downloadFile instead.

Parameters:

remotePath string - Path to the file in the Sandbox. Relative paths are resolved based on the sandbox working directory.
options? DownloadStreamOptions

Returns:

Promise<Readable> - A Node.js Readable stream of the file content.

Examples:

// Pipe directly to an HTTP response
const stream = await sandbox.fs.downloadFileStream('outputs/report.pdf');
stream.pipe(res);

// Download with progress tracking and cancellation
const controller = new AbortController();
const stream = await sandbox.fs.downloadFileStream('outputs/large-file.bin', {
  signal: controller.signal,
  onProgress: ({ bytesReceived, totalBytes }) => console.log(bytesReceived, totalBytes),
});
stream.pipe(createWriteStream('local-file.bin'));

findFiles()

findFiles(path: string, pattern: string): Promise<Match[]>

Searches for text patterns within files in the Sandbox.

Parameters:

path string - Directory to search in. Relative paths are resolved based on the sandbox working directory.
pattern string - Search pattern

Returns:

Promise<Match[]> - Array of matches with file and line information

Example:

// Find all TODO comments in TypeScript files
const matches = await fs.findFiles('app/src', 'TODO:');
matches.forEach(match => {
  console.log(`${match.file}:${match.line}: ${match.content}`);
});

getFileDetails()

getFileDetails(path: string): Promise<FileInfo>

Retrieves detailed information about a file or directory.

Parameters:

path string - Path to the file or directory. Relative paths are resolved based on the sandbox working directory.

Returns:

Promise<FileInfo> - Detailed file information including size, permissions, modification time

Example:

// Get file details
const info = await fs.getFileDetails('app/config.json');
console.log(`Size: ${info.size}, Modified: ${info.modTime}`);

listFiles()

listFiles(path: string): Promise<FileInfo[]>

Lists contents of a directory in the Sandbox.

Parameters:

path string - Directory path to list. Relative paths are resolved based on the sandbox working directory.

Returns:

Promise<FileInfo[]> - Array of file and directory information

Example:

// List directory contents
const files = await fs.listFiles('app/src');
files.forEach(file => {
  console.log(`${file.name} (${file.size} bytes)`);
});

moveFiles()

moveFiles(source: string, destination: string): Promise<void>

Moves or renames a file or directory.

Parameters:

source string - Source path. Relative paths are resolved based on the sandbox working directory.
destination string - Destination path. Relative paths are resolved based on the sandbox working directory.

Returns:

Promise<void>

Example:

// Move a file to a new location
await fs.moveFiles('app/temp/data.json', 'app/data/data.json');

replaceInFiles()

replaceInFiles(
   files: string[],
   pattern: string,
newValue: string): Promise<ReplaceResult[]>

Replaces text content in multiple files.

Parameters:

files string[] - Array of file paths to process. Relative paths are resolved based on the sandbox working directory.
pattern string - Pattern to replace
newValue string - Replacement text

Returns:

Promise<ReplaceResult[]> - Results of the replace operation for each file

Example:

// Update version number across multiple files
const results = await fs.replaceInFiles(
  ['app/package.json', 'app/version.ts'],
  '"version": "1.0.0"',
  '"version": "1.1.0"'
);

searchFiles()

searchFiles(path: string, pattern: string): Promise<SearchFilesResponse>

Searches for files and directories by name pattern in the Sandbox.

Parameters:

path string - Directory to search in. Relative paths are resolved based on the sandbox working directory.
pattern string - File name pattern (supports globs)

Returns:

Promise<SearchFilesResponse> - Search results with matching files

Example:

// Find all TypeScript files
const result = await fs.searchFiles('app', '*.ts');
result.files.forEach(file => console.log(file));

setFilePermissions()

setFilePermissions(path: string, permissions: FilePermissionsParams): Promise<void>

Sets permissions and ownership for a file or directory.

Parameters:

path string - Path to the file or directory. Relative paths are resolved based on the sandbox working directory.
permissions FilePermissionsParams - Permission settings

Returns:

Promise<void>

Example:

// Set file permissions and ownership
await fs.setFilePermissions('app/script.sh', {
  owner: 'daytona',
  group: 'users',
  mode: '755'  // Execute permission for shell script
});

uploadFile()

Call Signature

uploadFile(
   file: Buffer,
   remotePath: string,
timeout?: number): Promise<void>

Uploads a file to the Sandbox. This method loads the entire file into memory, so it is not recommended for uploading large files.

Parameters:

file Buffer - Buffer of the file to upload.
remotePath string - Destination path in the Sandbox. Relative paths are resolved based on the sandbox working directory.
timeout? number - Timeout for the upload operation in seconds. 0 means no timeout. Default is 30 minutes.

Returns:

Promise<void>

Example:

// Upload a configuration file
await fs.uploadFile(Buffer.from('{"setting": "value"}'), 'tmp/config.json');

Call Signature

uploadFile(
   localPath: string,
   remotePath: string,
timeout?: number): Promise<void>

Uploads a file from the local file system to the Sandbox. This method uses streaming to upload the file, so it is recommended for uploading larger files.

Parameters:

localPath string - Path to the local file to upload.
remotePath string - Destination path in the Sandbox. Relative paths are resolved based on the sandbox working directory.
timeout? number - Timeout for the upload operation in seconds. 0 means no timeout. Default is 30 minutes.

Returns:

Promise<void>

Example:

// Upload a local file
await fs.uploadFile('local_file.txt', 'tmp/file.txt');

uploadFiles()

uploadFiles(files: FileUpload[], timeout?: number): Promise<void>

Uploads multiple files to the Sandbox. If files already exist at the destination paths, they will be overwritten.

Parameters:

files FileUpload[] - Array of files to upload.
timeout? number = … - Timeout for the upload operation in seconds. 0 means no timeout. Default is 30 minutes.

Returns:

Promise<void>

Example:

// Upload multiple text files
const files = [
  {
    source: Buffer.from('Content of file 1'),
    destination: '/tmp/file1.txt'
  },
  {
    source: 'app/data/file2.txt',
    destination: '/tmp/file2.txt'
  },
  {
    source: Buffer.from('{"key": "value"}'),
    destination: '/tmp/config.json'
  }
];
await fs.uploadFiles(files);

uploadFileStream()

uploadFileStream(
   source: UploadSource,
   remotePath: string,
options?: UploadStreamOptions): Promise<void>

Uploads a single file to the Sandbox using true streaming, with optional progress tracking and cancellation. Memory usage stays flat regardless of source size: the SDK pipes the source through a transform that counts bytes and forwards to the underlying multipart upload without buffering the whole payload. The HTTP layer uses chunked transfer encoding, so the source’s natural EOF terminates the upload — no advance size is needed.

Parameters:

source UploadSource - The data to upload. Accepts the same Buffer | string inputs as FileSystem.uploadFile, plus Node Readable streams and Web ReadableStream instances. When a string is passed, it is treated as a local file path and read in streaming chunks.
remotePath string - Destination path in the Sandbox. Relative paths are resolved against the sandbox working directory.
options? UploadStreamOptions = - Streaming options: AbortSignal, onProgress callback, timeout.

Returns:

Promise<void>

Example:

// Upload a 2 GB file with progress tracking and the ability to cancel
import { createReadStream } from 'fs';
const controller = new AbortController();
await sandbox.fs.uploadFileStream(createReadStream('big.bin'), 'tmp/big.bin', {
  signal: controller.signal,
  onProgress: ({ bytesSent }) => console.log(`${bytesSent} bytes sent`),
});

DownloadMetadata

Represents metadata for a file download operation.

Properties:

destination? string - Destination path in the local filesystem where the file content will be streamed to.
error? string - Error message if the download failed, undefined if successful.
errorDetails? FileDownloadErrorDetails - Structured error metadata for a failed download item.
result? string | Buffer<ArrayBufferLike> | Uint8Array<ArrayBufferLike> - The download result - file path (if destination provided in the request) or bytes content (if no destination in the request), undefined if failed or no data received.

DownloadStreamOptions

Options for streaming file downloads.

Properties:

onProgress()? (progress: DownloadProgress) => void - Callback invoked with cumulative progress information.

Parameters:
- progress DownloadProgress
Returns:
- void
signal? AbortSignal - AbortSignal for cancelling the download.
timeout? number - Timeout in seconds. 0 means no timeout. Default is 30 minutes.

FileDownloadErrorDetails

Structured error metadata for a failed bulk file download item.

Properties:

errorCode? string - Machine-readable error code for the per-file failure.
message string - Human-readable error message.
statusCode? number - HTTP-style status code for the per-file failure.

FileDownloadRequest

Represents a request to download a single file from the Sandbox.

Properties:

destination? string - Destination path in the local filesystem where the file content will be streamed to. If not provided, the file will be downloaded in the bytes buffer (might cause memory issues if the file is large).
source string - Source path in the Sandbox. Relative paths are resolved based on the user’s root directory.

FileDownloadResponse

Represents the response to a single file download request.

Properties:

error? string - Error message if the download failed, undefined if successful.
errorDetails? FileDownloadErrorDetails - Structured error metadata when the server provides it.
result? string | Buffer<ArrayBufferLike> - The download result - file path (if destination provided in the request) or bytes content (if no destination in the request), undefined if failed or no data received.
source string - The original source path requested for download.

FilePermissionsParams

Parameters for setting file permissions in the Sandbox.

Properties:

group? string - Group owner of the file
mode? string - File mode/permissions in octal format (e.g. “644”)
owner? string - User owner of the file

Example:

const permissions: FilePermissionsParams = {
  mode: '644',
  owner: 'daytona',
  group: 'users'
};

FileUpload

Represents a file to be uploaded to the Sandbox.

Properties:

destination string - Absolute destination path in the Sandbox. Relative paths are resolved based on the sandbox working directory.
source string | Buffer<ArrayBufferLike> - File to upload. If a Buffer, it is interpreted as the file content which is loaded into memory. Make sure it fits into memory, otherwise use the local file path which content will be streamed to the Sandbox.

UploadStreamOptions

Options for streaming file uploads.

Properties:

onProgress()? (progress: UploadProgress) => void - Callback invoked with cumulative progress information.

Parameters:
- progress UploadProgress
Returns:
- void
signal? AbortSignal - AbortSignal for cancelling the upload.
timeout? number - Timeout in seconds. 0 means no timeout. Default is 30 minutes.

DownloadProgress

type DownloadProgress = {
  bytesReceived: number;
  totalBytes: number;
};

Type declaration:

bytesReceived number - Cumulative bytes received so far.
totalBytes? number - Total bytes expected, if known. Undefined if unavailable.

UploadProgress

type UploadProgress = {
  bytesSent: number;
};

Type declaration:

bytesSent number - Cumulative bytes sent so far.

UploadSource

type UploadSource = Buffer | Uint8Array | string | Readable | ReadableStream<Uint8Array>;

Source for a streaming file upload. The same input shapes accepted by FileSystem.uploadFile are also valid here, plus Node Readable streams and Web ReadableStream instances.