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commit 9ad64ec987
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plugins/fs/src/android.rs Normal file
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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use serde::de::DeserializeOwned;
use tauri::{plugin::PluginApi, AppHandle, Runtime};
use crate::{models::*, FilePath, OpenOptions};
const PLUGIN_IDENTIFIER: &str = "com.plugin.fs";
/// Access to the file system APIs on Android.
///
/// In addition to regular file system paths, it can read `content://` URIs
/// and Android asset paths by resolving them with the Android plugin implementation.
///
/// Retrieved with [`crate::FsExt::fs`].
pub struct Fs<R: Runtime>(tauri::plugin::PluginHandle<R>);
pub fn init<R: Runtime, C: DeserializeOwned>(
_app: &AppHandle<R>,
api: PluginApi<R, C>,
) -> crate::Result<Fs<R>> {
let handle = api
.register_android_plugin(PLUGIN_IDENTIFIER, "FsPlugin")
.unwrap();
Ok(Fs(handle))
}
impl<R: Runtime> Fs<R> {
/// Open a file.
///
/// # Platform-specific
///
/// - **iOS**: This method will automatically start accessing a security-scoped resource if the path is a file URL.
/// You must call `stop_accessing_security_scoped_resource` when you're done accessing the file.
pub fn open<P: Into<FilePath>>(
&self,
path: P,
opts: OpenOptions,
) -> std::io::Result<std::fs::File> {
match path.into() {
FilePath::Url(u) => self
.resolve_content_uri(u.to_string(), opts.android_mode())
.map_err(|e| {
std::io::Error::new(
std::io::ErrorKind::Other,
format!("failed to open file: {e}"),
)
}),
FilePath::Path(p) => {
// tauri::utils::platform::resources_dir() returns a PathBuf with the Android asset URI prefix
// we must resolve that file with the Android API
if p.strip_prefix(tauri::utils::platform::ANDROID_ASSET_PROTOCOL_URI_PREFIX)
.is_ok()
{
self.resolve_content_uri(p.to_string_lossy(), opts.android_mode())
.map_err(|e| {
std::io::Error::new(
std::io::ErrorKind::Other,
format!("failed to open file: {e}"),
)
})
} else {
std::fs::OpenOptions::from(opts).open(p)
}
}
}
}
fn resolve_content_uri(
&self,
uri: impl Into<String>,
mode: impl Into<String>,
) -> crate::Result<std::fs::File> {
let result = self.0.run_mobile_plugin::<GetFileDescriptorResponse>(
"getFileDescriptor",
GetFileDescriptorPayload {
uri: uri.into(),
mode: mode.into(),
},
)?;
if let Some(fd) = result.fd {
Ok(unsafe {
use std::os::fd::FromRawFd;
std::fs::File::from_raw_fd(fd)
})
} else {
unimplemented!()
}
}
}

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plugins/fs/src/config.rs Normal file
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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use serde::Deserialize;
#[derive(Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
pub struct Config {
/// Whether or not paths that contain components that start with a `.`
/// will require that `.` appears literally in the pattern; `*`, `?`, `**`,
/// or `[...]` will not match. This is useful because such files are
/// conventionally considered hidden on Unix systems and it might be
/// desirable to skip them when listing files.
///
/// Defaults to `true` on Unix systems and `false` on Windows
// dotfiles are not supposed to be exposed by default on unix
pub require_literal_leading_dot: Option<bool>,
}

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plugins/fs/src/desktop.rs Normal file
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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use std::path::PathBuf;
use tauri::{AppHandle, Runtime};
use crate::{FilePath, OpenOptions};
/// Access to the file system APIs on desktop.
///
/// Retrieved with [`crate::FsExt::fs`].
pub struct Fs<R: Runtime>(pub(crate) AppHandle<R>);
fn path_or_err<P: Into<FilePath>>(p: P) -> std::io::Result<PathBuf> {
match p.into() {
FilePath::Path(p) => Ok(p),
FilePath::Url(u) if u.scheme() == "file" => u
.to_file_path()
.map_err(|_| std::io::Error::new(std::io::ErrorKind::InvalidInput, "invalid file URL")),
FilePath::Url(_) => Err(std::io::Error::new(
std::io::ErrorKind::InvalidInput,
"cannot use a URL to load files on desktop and iOS",
)),
}
}
impl<R: Runtime> Fs<R> {
/// Open a file.
///
/// # Platform-specific
///
/// - **iOS**: This method will automatically start accessing a security-scoped resource if the path is a file URL.
/// You must call `stop_accessing_security_scoped_resource` when you're done accessing the file.
pub fn open<P: Into<FilePath>>(
&self,
path: P,
opts: OpenOptions,
) -> std::io::Result<std::fs::File> {
let path = path_or_err(path)?;
std::fs::OpenOptions::from(opts).open(path)
}
}

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plugins/fs/src/error.rs Normal file
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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use std::path::PathBuf;
use serde::{Serialize, Serializer};
/// Errors that can happen while using the file system plugin.
#[derive(Debug, thiserror::Error)]
#[non_exhaustive]
pub enum Error {
/// JSON serialization or deserialization error.
#[error(transparent)]
Json(#[from] serde_json::Error),
/// Error from the Tauri APIs, usually raised while resolving a path or a scope entry.
#[error(transparent)]
Tauri(#[from] tauri::Error),
/// Error from the underlying file system operation.
#[error(transparent)]
Io(#[from] std::io::Error),
/// The path is denied by the plugin scope or is not allowed by it.
#[error("forbidden path: {0}")]
PathForbidden(PathBuf),
/// Invalid glob pattern.
#[error("invalid glob pattern: {0}")]
GlobPattern(#[from] glob::PatternError),
/// Watcher error.
#[cfg(feature = "watch")]
#[error(transparent)]
Watch(#[from] notify::Error),
/// Error invoking the Android plugin implementation.
#[cfg(target_os = "android")]
#[error(transparent)]
PluginInvoke(#[from] tauri::plugin::mobile::PluginInvokeError),
/// The URL cannot be converted to a file system path.
#[error("URL is not a valid path")]
InvalidPathUrl,
/// The path is not safe to use, for instance because it traverses parent directories.
#[error("Unsafe PathBuf: {0}")]
UnsafePathBuf(&'static str),
}
impl Serialize for Error {
fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_str(self.to_string().as_ref())
}
}

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plugins/fs/src/file_path.rs Normal file
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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use std::{
convert::Infallible,
path::{Path, PathBuf},
str::FromStr,
};
use serde::Serialize;
use tauri::path::SafePathBuf;
use crate::{Error, Result};
/// Represents either a filesystem path or a URI pointing to a file
/// such as `file://` URIs or Android `content://` URIs.
#[derive(Debug, Serialize, Clone)]
#[serde(untagged)]
pub enum FilePath {
/// `file://` URIs or Android `content://` URIs.
Url(url::Url),
/// Regular [`PathBuf`]
Path(PathBuf),
}
/// Represents either a safe filesystem path or a URI pointing to a file
/// such as `file://` URIs or Android `content://` URIs.
#[derive(Debug, Clone, Serialize)]
pub enum SafeFilePath {
/// `file://` URIs or Android `content://` URIs.
Url(url::Url),
/// Safe [`PathBuf`], see [`SafePathBuf``].
Path(SafePathBuf),
}
impl FilePath {
/// Get a reference to the contained [`Path`] if the variant is [`FilePath::Path`].
///
/// Use [`FilePath::into_path`] to try to convert the [`FilePath::Url`] variant as well.
#[inline]
pub fn as_path(&self) -> Option<&Path> {
match self {
Self::Url(_) => None,
Self::Path(p) => Some(p),
}
}
/// Try to convert into [`PathBuf`] if possible.
///
/// This calls [`Url::to_file_path`](url::Url::to_file_path) if the variant is [`FilePath::Url`],
/// otherwise returns the contained [PathBuf] as is.
#[inline]
pub fn into_path(self) -> Result<PathBuf> {
match self {
Self::Url(url) => url.to_file_path().map_err(|_| Error::InvalidPathUrl),
Self::Path(p) => Ok(p),
}
}
/// Takes the contained [`PathBuf`] if the variant is [`FilePath::Path`],
/// and when possible, converts Windows UNC paths to regular paths.
#[inline]
pub fn simplified(self) -> Self {
match self {
Self::Url(url) => Self::Url(url),
Self::Path(p) => Self::Path(dunce::simplified(&p).to_path_buf()),
}
}
}
impl SafeFilePath {
/// Get a reference to the contained [`Path`] if the variant is [`SafeFilePath::Path`].
///
/// Use [`SafeFilePath::into_path`] to try to convert the [`SafeFilePath::Url`] variant as well.
#[inline]
pub fn as_path(&self) -> Option<&Path> {
match self {
Self::Url(_) => None,
Self::Path(p) => Some(p.as_ref()),
}
}
/// Try to convert into [`PathBuf`] if possible.
///
/// This calls [`Url::to_file_path`](url::Url::to_file_path) if the variant is [`SafeFilePath::Url`],
/// otherwise returns the contained [PathBuf] as is.
#[inline]
pub fn into_path(self) -> Result<PathBuf> {
match self {
Self::Url(url) => url.to_file_path().map_err(|_| Error::InvalidPathUrl),
Self::Path(p) => Ok(p.as_ref().to_owned()),
}
}
/// Takes the contained [`PathBuf`] if the variant is [`SafeFilePath::Path`],
/// and when possible, converts Windows UNC paths to regular paths.
#[inline]
pub fn simplified(self) -> Self {
match self {
Self::Url(url) => Self::Url(url),
Self::Path(p) => {
// Safe to unwrap since it was a safe file path already
Self::Path(SafePathBuf::new(dunce::simplified(p.as_ref()).to_path_buf()).unwrap())
}
}
}
}
impl std::fmt::Display for FilePath {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::Url(u) => u.fmt(f),
Self::Path(p) => p.display().fmt(f),
}
}
}
impl std::fmt::Display for SafeFilePath {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::Url(u) => u.fmt(f),
Self::Path(p) => p.display().fmt(f),
}
}
}
impl<'de> serde::Deserialize<'de> for FilePath {
fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
struct FilePathVisitor;
impl serde::de::Visitor<'_> for FilePathVisitor {
type Value = FilePath;
fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
formatter.write_str("a string representing an file URL or a path")
}
fn visit_str<E>(self, s: &str) -> std::result::Result<Self::Value, E>
where
E: serde::de::Error,
{
FilePath::from_str(s).map_err(|e| {
serde::de::Error::invalid_value(
serde::de::Unexpected::Str(s),
&e.to_string().as_str(),
)
})
}
}
deserializer.deserialize_str(FilePathVisitor)
}
}
impl<'de> serde::Deserialize<'de> for SafeFilePath {
fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
struct SafeFilePathVisitor;
impl serde::de::Visitor<'_> for SafeFilePathVisitor {
type Value = SafeFilePath;
fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
formatter.write_str("a string representing an file URL or a path")
}
fn visit_str<E>(self, s: &str) -> std::result::Result<Self::Value, E>
where
E: serde::de::Error,
{
SafeFilePath::from_str(s).map_err(|e| {
serde::de::Error::invalid_value(
serde::de::Unexpected::Str(s),
&e.to_string().as_str(),
)
})
}
}
deserializer.deserialize_str(SafeFilePathVisitor)
}
}
impl FromStr for FilePath {
type Err = Infallible;
fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
if let Ok(url) = url::Url::from_str(s) {
if url.scheme().len() != 1 {
return Ok(Self::Url(url));
}
}
Ok(Self::Path(PathBuf::from(s)))
}
}
impl FromStr for SafeFilePath {
type Err = Error;
fn from_str(s: &str) -> Result<Self> {
if let Ok(url) = url::Url::from_str(s) {
if url.scheme().len() != 1 {
return Ok(Self::Url(url));
}
}
SafePathBuf::new(s.into())
.map(SafeFilePath::Path)
.map_err(Error::UnsafePathBuf)
}
}
impl From<PathBuf> for FilePath {
fn from(value: PathBuf) -> Self {
Self::Path(value)
}
}
impl TryFrom<PathBuf> for SafeFilePath {
type Error = Error;
fn try_from(value: PathBuf) -> Result<Self> {
SafePathBuf::new(value)
.map(SafeFilePath::Path)
.map_err(Error::UnsafePathBuf)
}
}
impl From<&Path> for FilePath {
fn from(value: &Path) -> Self {
Self::Path(value.to_owned())
}
}
impl TryFrom<&Path> for SafeFilePath {
type Error = Error;
fn try_from(value: &Path) -> Result<Self> {
SafePathBuf::new(value.to_path_buf())
.map(SafeFilePath::Path)
.map_err(Error::UnsafePathBuf)
}
}
impl From<&PathBuf> for FilePath {
fn from(value: &PathBuf) -> Self {
Self::Path(value.to_owned())
}
}
impl TryFrom<&PathBuf> for SafeFilePath {
type Error = Error;
fn try_from(value: &PathBuf) -> Result<Self> {
SafePathBuf::new(value.to_owned())
.map(SafeFilePath::Path)
.map_err(Error::UnsafePathBuf)
}
}
impl From<url::Url> for FilePath {
fn from(value: url::Url) -> Self {
Self::Url(value)
}
}
impl From<url::Url> for SafeFilePath {
fn from(value: url::Url) -> Self {
Self::Url(value)
}
}
impl TryFrom<FilePath> for PathBuf {
type Error = Error;
fn try_from(value: FilePath) -> Result<Self> {
value.into_path()
}
}
impl TryFrom<SafeFilePath> for PathBuf {
type Error = Error;
fn try_from(value: SafeFilePath) -> Result<Self> {
value.into_path()
}
}
impl From<SafeFilePath> for FilePath {
fn from(value: SafeFilePath) -> Self {
match value {
SafeFilePath::Url(url) => FilePath::Url(url),
SafeFilePath::Path(p) => FilePath::Path(p.as_ref().to_owned()),
}
}
}
impl TryFrom<FilePath> for SafeFilePath {
type Error = Error;
fn try_from(value: FilePath) -> Result<Self> {
match value {
FilePath::Url(url) => Ok(SafeFilePath::Url(url)),
FilePath::Path(p) => SafePathBuf::new(p)
.map(SafeFilePath::Path)
.map_err(Error::UnsafePathBuf),
}
}
}

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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use serde::de::DeserializeOwned;
use tauri::{plugin::PluginApi, AppHandle, Runtime};
use crate::{FilePath, OpenOptions};
/// Access to the file system APIs on iOS.
///
/// Opening a `file://` URL automatically starts accessing the matching security-scoped resource.
///
/// Retrieved with [`crate::FsExt::fs`].
pub struct Fs<R: Runtime> {
_phantom: std::marker::PhantomData<fn() -> R>,
}
pub fn init<R: Runtime, C: DeserializeOwned>(
_app: &AppHandle<R>,
_api: PluginApi<R, C>,
) -> crate::Result<Fs<R>> {
Ok(Fs {
_phantom: std::marker::PhantomData,
})
}
impl<R: Runtime> Fs<R> {
/// Open a file.
///
/// # Platform-specific
///
/// - **iOS**: This method will automatically start accessing a security-scoped resource if the path is a file URL.
/// You must call [`Self::stop_accessing_security_scoped_resource`] when you're done accessing the file.
pub fn open<P: Into<FilePath>>(
&self,
path: P,
opts: OpenOptions,
) -> std::io::Result<std::fs::File> {
use objc2_foundation::{NSString, NSURL};
match path.into() {
FilePath::Url(url) if url.scheme() == "file" => {
// Handle security-scoped URLs on iOS
let url_string = url.as_str();
let url_nsstring = NSString::from_str(url_string);
// Create NSURL from the URL string
// URLWithString may return None for invalid URLs, but file:// URLs should be valid
let ns_url = unsafe { NSURL::URLWithString(&url_nsstring) };
if let Some(ns_url) = ns_url {
// Start accessing the security-scoped resource
// This is required for files outside the app's sandbox (e.g., from file picker)
// Note: We don't call stopAccessingSecurityScopedResource here because
// the file handle needs to remain accessible while the File is in use.
// The access will be automatically stopped when the app is backgrounded or terminated.
unsafe {
let success = ns_url.startAccessingSecurityScopedResource();
if success {
log::debug!(
"Started accessing security-scoped resource for URL: {}",
url_string
);
} else {
log::warn!(
"Failed to start accessing security-scoped resource for URL: {}",
url_string
);
}
}
} else {
log::debug!("Failed to create NSURL from URL: {}, ignoring security-scoped resource access request", url_string);
}
// Convert URL to path and open the file
let path = url.to_file_path().map_err(|_| {
std::io::Error::new(std::io::ErrorKind::InvalidInput, "invalid file URL")
})?;
std::fs::OpenOptions::from(opts).open(path)
}
FilePath::Url(_) => Err(std::io::Error::new(
std::io::ErrorKind::InvalidInput,
"cannot use a non-file URL to load files on iOS",
)),
FilePath::Path(p) => {
// Regular path, no security-scoped resource handling needed
std::fs::OpenOptions::from(opts).open(p)
}
}
}
/// Stops accessing a security-scoped resource for the given file path or URL.
/// This should be called when you're done accessing a file that was opened
/// using a security-scoped URL (e.g., from a file picker).
///
/// # Arguments
///
/// * `path` - A file path or URL that was previously accessed via `startAccessingSecurityScopedResource`
///
/// # Returns
///
/// Returns `Ok(())` if successful, or an error if the path/URL is invalid or not a file URL.
pub fn stop_accessing_security_scoped_resource<P: Into<FilePath>>(
&self,
path: P,
) -> crate::Result<()> {
use objc2_foundation::{NSString, NSURL};
let file_path = path.into();
let url_string = match file_path {
FilePath::Url(url) => {
if url.scheme() != "file" {
return Err(crate::Error::InvalidPathUrl);
}
url.as_str().to_string()
}
FilePath::Path(p) => {
// Convert path to file URL
url::Url::from_file_path(&p)
.map_err(|_| crate::Error::InvalidPathUrl)?
.as_str()
.to_string()
}
};
let url_nsstring = NSString::from_str(&url_string);
let ns_url = unsafe { NSURL::URLWithString(&url_nsstring) };
if let Some(ns_url) = ns_url {
// Stop accessing the security-scoped resource
unsafe {
ns_url.stopAccessingSecurityScopedResource();
}
} else {
return Err(crate::Error::Io(std::io::Error::new(
std::io::ErrorKind::InvalidInput,
"failed to create NSURL from URL",
)));
}
Ok(())
}
}

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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
//! Access the file system.
//!
//! ## Cargo features
//!
//! - **watch**: Enables the `watch` command backed by [`notify`](http://crates.io/crates/notify).
// TODO(v3): consider redesign the API to implement automatic stopAccessingSecurityScopedResource on iOS
// this likely requires returning a handle to a resource so we can impl Drop for it
#![doc(
html_logo_url = "https://github.com/tauri-apps/tauri/raw/dev/app-icon.png",
html_favicon_url = "https://github.com/tauri-apps/tauri/raw/dev/app-icon.png"
)]
use std::io::Read;
#[cfg(target_os = "ios")]
use std::sync::Mutex;
use serde::Deserialize;
use tauri::{
ipc::ScopeObject,
plugin::{Builder as PluginBuilder, TauriPlugin},
utils::{acl::Value, config::FsScope},
AppHandle, DragDropEvent, Manager, RunEvent, Runtime, WindowEvent,
};
#[cfg(target_os = "android")]
mod android;
mod commands;
mod config;
#[cfg(desktop)]
mod desktop;
mod error;
mod file_path;
#[cfg(target_os = "ios")]
mod ios;
#[cfg(target_os = "android")]
mod models;
mod scope;
#[cfg(feature = "watch")]
mod watcher;
#[cfg(target_os = "android")]
pub use android::Fs;
#[cfg(desktop)]
pub use desktop::Fs;
#[cfg(target_os = "ios")]
pub use ios::Fs;
pub use error::Error;
pub use file_path::FilePath;
pub use file_path::SafeFilePath;
type Result<T> = std::result::Result<T, Error>;
/// Options and flags which can be used to configure how a file is opened.
///
/// This builder exposes the ability to configure how a [`std::fs::File`] is opened and
/// what operations are permitted on the open file. Build it with [`OpenOptions::new`],
/// chain calls to the setter methods and pass it to [`Fs::open`].
///
/// The `read` option defaults to `true`, every other option defaults to `false`.
#[derive(Debug, Default, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct OpenOptions {
#[serde(default = "default_true")]
read: bool,
#[serde(default)]
write: bool,
#[serde(default)]
append: bool,
#[serde(default)]
truncate: bool,
#[serde(default)]
create: bool,
#[serde(default)]
create_new: bool,
#[serde(default)]
#[allow(unused)]
mode: Option<u32>,
#[serde(default)]
#[allow(unused)]
custom_flags: Option<i32>,
}
fn default_true() -> bool {
true
}
impl From<OpenOptions> for std::fs::OpenOptions {
fn from(open_options: OpenOptions) -> Self {
let mut opts = std::fs::OpenOptions::new();
#[cfg(unix)]
{
use std::os::unix::fs::OpenOptionsExt;
if let Some(mode) = open_options.mode {
opts.mode(mode);
}
if let Some(flags) = open_options.custom_flags {
opts.custom_flags(flags);
}
}
opts.read(open_options.read)
.write(open_options.write)
.create(open_options.create)
.append(open_options.append)
.truncate(open_options.truncate)
.create_new(open_options.create_new);
opts
}
}
impl OpenOptions {
/// Creates a blank new set of options ready for configuration.
///
/// All options are initially set to `false`.
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri_plugin_fs::{FsExt, OpenOptions};
///
/// tauri::Builder::default()
/// .setup(|app| {
/// let mut options = OpenOptions::new();
/// options.read(true);
/// let file = app.fs().open(Path::new("foo.txt"), options)?;
/// Ok(())
/// });
/// ```
#[must_use]
pub fn new() -> Self {
Self::default()
}
/// Sets the option for read access.
///
/// This option, when true, will indicate that the file should be
/// `read`-able if opened.
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri_plugin_fs::{FsExt, OpenOptions};
///
/// tauri::Builder::default()
/// .setup(|app| {
/// let mut options = OpenOptions::new();
/// options.read(true);
/// let file = app.fs().open(Path::new("foo.txt"), options)?;
/// Ok(())
/// });
/// ```
pub fn read(&mut self, read: bool) -> &mut Self {
self.read = read;
self
}
/// Sets the option for write access.
///
/// This option, when true, will indicate that the file should be
/// `write`-able if opened.
///
/// If the file already exists, any write calls on it will overwrite its
/// contents, without truncating it.
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri_plugin_fs::{FsExt, OpenOptions};
///
/// tauri::Builder::default()
/// .setup(|app| {
/// let mut options = OpenOptions::new();
/// options.write(true);
/// let file = app.fs().open(Path::new("foo.txt"), options)?;
/// Ok(())
/// });
/// ```
pub fn write(&mut self, write: bool) -> &mut Self {
self.write = write;
self
}
/// Sets the option for the append mode.
///
/// This option, when true, means that writes will append to a file instead
/// of overwriting previous contents.
/// Note that setting `.write(true).append(true)` has the same effect as
/// setting only `.append(true)`.
///
/// Append mode guarantees that writes will be positioned at the current end of file,
/// even when there are other processes or threads appending to the same file. This is
/// unlike <code>[seek]\([SeekFrom]::[End]\(0))</code> followed by `write()`, which
/// has a race between seeking and writing during which another writer can write, with
/// our `write()` overwriting their data.
///
/// Keep in mind that this does not necessarily guarantee that data appended by
/// different processes or threads does not interleave. The amount of data accepted a
/// single `write()` call depends on the operating system and file system. A
/// successful `write()` is allowed to write only part of the given data, so even if
/// you're careful to provide the whole message in a single call to `write()`, there
/// is no guarantee that it will be written out in full. If you rely on the filesystem
/// accepting the message in a single write, make sure that all data that belongs
/// together is written in one operation. This can be done by concatenating strings
/// before passing them to [`write()`].
///
/// If a file is opened with both read and append access, beware that after
/// opening, and after every write, the position for reading may be set at the
/// end of the file. So, before writing, save the current position (using
/// <code>[Seek]::[stream_position]</code>), and restore it before the next read.
///
/// ## Note
///
/// This function doesn't create the file if it doesn't exist. Use the
/// [`OpenOptions::create`] method to do so.
///
/// [`write()`]: std::io::Write::write "io::Write::write"
/// [`flush()`]: std::io::Write::flush "io::Write::flush"
/// [Seek]: std::io::Seek "io::Seek"
/// [stream_position]: std::io::Seek::stream_position "io::Seek::stream_position"
/// [seek]: std::io::Seek::seek "io::Seek::seek"
/// [SeekFrom]: std::io::SeekFrom "io::SeekFrom"
/// [Current]: std::io::SeekFrom::Current "io::SeekFrom::Current"
/// [End]: std::io::SeekFrom::End "io::SeekFrom::End"
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri_plugin_fs::{FsExt, OpenOptions};
///
/// tauri::Builder::default()
/// .setup(|app| {
/// let mut options = OpenOptions::new();
/// options.append(true);
/// let file = app.fs().open(Path::new("foo.txt"), options)?;
/// Ok(())
/// });
/// ```
pub fn append(&mut self, append: bool) -> &mut Self {
self.append = append;
self
}
/// Sets the option for truncating a previous file.
///
/// If a file is successfully opened with this option set it will truncate
/// the file to 0 length if it already exists.
///
/// The file must be opened with write access for truncate to work.
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri_plugin_fs::{FsExt, OpenOptions};
///
/// tauri::Builder::default()
/// .setup(|app| {
/// let mut options = OpenOptions::new();
/// options.write(true).truncate(true);
/// let file = app.fs().open(Path::new("foo.txt"), options)?;
/// Ok(())
/// });
/// ```
pub fn truncate(&mut self, truncate: bool) -> &mut Self {
self.truncate = truncate;
self
}
/// Sets the option to create a new file, or open it if it already exists.
///
/// In order for the file to be created, [`OpenOptions::write`] or
/// [`OpenOptions::append`] access must be used.
///
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri_plugin_fs::{FsExt, OpenOptions};
///
/// tauri::Builder::default()
/// .setup(|app| {
/// let mut options = OpenOptions::new();
/// options.write(true).create(true);
/// let file = app.fs().open(Path::new("foo.txt"), options)?;
/// Ok(())
/// });
/// ```
pub fn create(&mut self, create: bool) -> &mut Self {
self.create = create;
self
}
/// Sets the option to create a new file, failing if it already exists.
///
/// No file is allowed to exist at the target location, also no (dangling) symlink. In this
/// way, if the call succeeds, the file returned is guaranteed to be new.
/// If a file exists at the target location, creating a new file will fail with [`AlreadyExists`]
/// or another error based on the situation. See [`std::fs::OpenOptions::open`] for a
/// non-exhaustive list of likely errors.
///
/// This option is useful because it is atomic. Otherwise between checking
/// whether a file exists and creating a new one, the file may have been
/// created by another process (a TOCTOU race condition / attack).
///
/// If `.create_new(true)` is set, [`.create()`] and [`.truncate()`] are
/// ignored.
///
/// The file must be opened with write or append access in order to create
/// a new file.
///
/// [`.create()`]: OpenOptions::create
/// [`.truncate()`]: OpenOptions::truncate
/// [`AlreadyExists`]: std::io::ErrorKind::AlreadyExists
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri_plugin_fs::{FsExt, OpenOptions};
///
/// tauri::Builder::default()
/// .setup(|app| {
/// let mut options = OpenOptions::new();
/// options.write(true).create_new(true);
/// let file = app.fs().open(Path::new("foo.txt"), options)?;
/// Ok(())
/// });
/// ```
pub fn create_new(&mut self, create_new: bool) -> &mut Self {
self.create_new = create_new;
self
}
}
#[cfg(unix)]
impl std::os::unix::fs::OpenOptionsExt for OpenOptions {
fn custom_flags(&mut self, flags: i32) -> &mut Self {
self.custom_flags.replace(flags);
self
}
fn mode(&mut self, mode: u32) -> &mut Self {
self.mode.replace(mode);
self
}
}
impl OpenOptions {
#[cfg(target_os = "android")]
fn android_mode(&self) -> String {
let mut mode = String::new();
if self.read {
mode.push('r');
}
if self.write {
mode.push('w');
}
if self.truncate {
mode.push('t');
}
if self.append {
mode.push('a');
}
mode
}
}
impl<R: Runtime> Fs<R> {
/// Reads the entire contents of a file into a string.
///
/// The file is opened in read-only mode with [`Fs::open`].
///
/// # Errors
///
/// Returns an error if `path` cannot be opened for reading or if its
/// contents are not valid UTF-8.
pub fn read_to_string<P: Into<FilePath>>(&self, path: P) -> std::io::Result<String> {
let mut s = String::new();
self.open(
path,
OpenOptions {
read: true,
..Default::default()
},
)?
.read_to_string(&mut s)?;
Ok(s)
}
/// Reads the entire contents of a file into a bytes vector.
///
/// The file is opened in read-only mode with [`Fs::open`].
///
/// # Errors
///
/// Returns an error if `path` cannot be opened for reading.
pub fn read<P: Into<FilePath>>(&self, path: P) -> std::io::Result<Vec<u8>> {
let mut buf = Vec::new();
self.open(
path,
OpenOptions {
read: true,
..Default::default()
},
)?
.read_to_end(&mut buf)?;
Ok(buf)
}
}
// implement ScopeObject here instead of in the scope module because it is also used on the build script
// and we don't want to add tauri as a build dependency
impl ScopeObject for scope::Entry {
type Error = Error;
fn deserialize<R: Runtime>(
app: &AppHandle<R>,
raw: Value,
) -> std::result::Result<Self, Self::Error> {
let path = serde_json::from_value(raw.into()).map(|raw| match raw {
scope::EntryRaw::Value(path) => path,
scope::EntryRaw::Object { path } => path,
})?;
match app.path().parse(path) {
Ok(path) => Ok(Self { path: Some(path) }),
#[cfg(not(target_os = "android"))]
Err(tauri::Error::UnknownPath) => Ok(Self { path: None }),
Err(err) => Err(err.into()),
}
}
}
pub(crate) struct Scope {
pub(crate) scope: tauri::fs::Scope,
pub(crate) require_literal_leading_dot: Option<bool>,
}
/// Tracks which paths have active security-scoped resource access on iOS.
#[cfg(target_os = "ios")]
pub(crate) struct SecurityScopedResources {
/// Set of file URLs that are currently accessing security-scoped resources.
/// The key is the URL string representation.
pub(crate) active_urls: Mutex<std::collections::HashSet<String>>,
}
#[cfg(target_os = "ios")]
impl SecurityScopedResources {
pub(crate) fn new() -> Self {
Self {
active_urls: Mutex::new(std::collections::HashSet::new()),
}
}
pub(crate) fn is_tracked_manually(&self, url: &str) -> bool {
self.active_urls.lock().unwrap().contains(url)
}
pub(crate) fn track_manually(&self, url: String) {
self.active_urls.lock().unwrap().insert(url);
}
pub(crate) fn remove(&self, url: &str) {
self.active_urls.lock().unwrap().remove(url);
}
}
#[cfg(not(target_os = "ios"))]
pub(crate) struct SecurityScopedResources;
#[cfg(not(target_os = "ios"))]
impl SecurityScopedResources {
pub(crate) fn new() -> Self {
Self
}
#[allow(dead_code)] // Used on iOS, but not on other platforms
pub(crate) fn is_tracked_manually(&self, _url: &str) -> bool {
false
}
#[allow(dead_code)] // Used on iOS, but not on other platforms
pub(crate) fn track_manually(&self, _url: String) {}
#[allow(dead_code)] // Used on iOS, but not on other platforms
pub(crate) fn remove(&self, _url: &str) {}
}
/// Extension trait implemented by every [`Manager`] (the app handle, windows, webviews, ...)
/// to access the file system plugin APIs.
///
/// # Examples
///
/// ```rust,no_run
/// use std::path::Path;
/// use tauri::Runtime;
/// use tauri_plugin_fs::FsExt;
///
/// fn setup<R: Runtime>(app: &tauri::App<R>) -> Result<(), Box<dyn std::error::Error>> {
/// // allow the app to access a directory that is not part of the static scope
/// app.fs_scope().allow_directory(Path::new("/path/to/directory"), true)?;
///
/// let contents = app.fs().read_to_string(Path::new("/path/to/directory/file.txt"))?;
/// println!("{contents}");
///
/// Ok(())
/// }
/// ```
pub trait FsExt<R: Runtime> {
/// Returns the file system scope, which can be used to dynamically
/// allow or deny paths at runtime.
///
/// # Panics
///
/// Panics if the plugin is not registered in the app.
/// Use [`FsExt::try_fs_scope`] if the plugin might not be registered.
fn fs_scope(&self) -> tauri::fs::Scope;
/// Returns the file system scope, or `None` if the plugin is not registered in the app.
fn try_fs_scope(&self) -> Option<tauri::fs::Scope>;
/// Cross platform file system APIs that also support manipulating Android files.
fn fs(&self) -> &Fs<R>;
}
impl<R: Runtime, T: Manager<R>> FsExt<R> for T {
fn fs_scope(&self) -> tauri::fs::Scope {
self.state::<Scope>().scope.clone()
}
fn try_fs_scope(&self) -> Option<tauri::fs::Scope> {
self.try_state::<Scope>().map(|s| s.scope.clone())
}
fn fs(&self) -> &Fs<R> {
self.state::<Fs<R>>().inner()
}
}
/// Initializes the plugin.
pub fn init<R: Runtime>() -> TauriPlugin<R, Option<config::Config>> {
PluginBuilder::<R, Option<config::Config>>::new("fs")
.invoke_handler(tauri::generate_handler![
commands::create,
commands::open,
commands::copy_file,
commands::mkdir,
commands::read_dir,
commands::read,
commands::read_file,
commands::read_text_file,
commands::read_text_file_lines,
commands::read_text_file_lines_next,
commands::remove,
commands::rename,
commands::seek,
commands::stat,
commands::lstat,
commands::fstat,
commands::truncate,
commands::ftruncate,
commands::write,
commands::write_file,
commands::write_text_file,
commands::exists,
commands::size,
commands::start_accessing_security_scoped_resource,
commands::stop_accessing_security_scoped_resource,
#[cfg(feature = "watch")]
watcher::watch,
])
.setup(|app, api| {
let scope = Scope {
require_literal_leading_dot: api
.config()
.as_ref()
.and_then(|c| c.require_literal_leading_dot),
scope: tauri::fs::Scope::new(app, &FsScope::default())?,
};
#[cfg(target_os = "android")]
{
let fs = android::init(app, api)?;
app.manage(fs);
}
#[cfg(target_os = "ios")]
{
let fs = ios::init(app, api)?;
app.manage(fs);
}
#[cfg(desktop)]
app.manage(Fs(app.clone()));
app.manage(scope);
app.manage(SecurityScopedResources::new());
Ok(())
})
.on_event(|app, event| {
if let RunEvent::WindowEvent {
label: _,
event: WindowEvent::DragDrop(DragDropEvent::Drop { paths, position: _ }),
..
} = event
{
let scope = app.fs_scope();
for path in paths {
if path.is_file() {
let _ = scope.allow_file(path);
} else {
let _ = scope.allow_directory(path, true);
}
}
}
})
.build()
}

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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use serde::{Deserialize, Serialize};
#[derive(Debug, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct GetFileDescriptorPayload {
pub uri: String,
pub mode: String,
}
#[derive(Debug, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct GetFileDescriptorResponse {
pub fd: Option<i32>,
}

19
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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use std::path::PathBuf;
use serde::Deserialize;
#[derive(Debug)]
pub struct Entry {
pub path: Option<PathBuf>,
}
#[derive(Deserialize)]
#[serde(untagged)]
pub(crate) enum EntryRaw {
Value(PathBuf),
Object { path: PathBuf },
}

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// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
use notify::{Config, RecommendedWatcher, RecursiveMode, Watcher};
use notify_debouncer_full::{new_debouncer, DebouncedEvent, Debouncer, RecommendedCache};
use serde::Deserialize;
use tauri::{
ipc::{Channel, CommandScope, GlobalScope},
path::BaseDirectory,
Manager, Resource, ResourceId, Runtime, Webview,
};
use std::time::Duration;
use crate::{
commands::{resolve_path, CommandResult},
scope::Entry,
SafeFilePath,
};
#[allow(unused)]
enum WatcherKind {
Debouncer(Debouncer<RecommendedWatcher, RecommendedCache>),
Watcher(RecommendedWatcher),
}
impl Resource for WatcherKind {}
#[derive(Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct WatchOptions {
base_dir: Option<BaseDirectory>,
#[serde(default)]
recursive: bool,
delay_ms: Option<u64>,
}
#[tauri::command]
pub fn watch<R: Runtime>(
webview: Webview<R>,
paths: Vec<SafeFilePath>,
options: WatchOptions,
on_event: Channel<notify::Event>,
global_scope: GlobalScope<Entry>,
command_scope: CommandScope<Entry>,
) -> CommandResult<ResourceId> {
let resolved_paths = paths
.into_iter()
.map(|path| {
resolve_path(
"watch",
&webview,
&global_scope,
&command_scope,
path,
options.base_dir,
)
})
.collect::<CommandResult<Vec<_>>>()?;
let recursive_mode = if options.recursive {
RecursiveMode::Recursive
} else {
RecursiveMode::NonRecursive
};
let watcher_kind = if let Some(delay) = options.delay_ms {
let mut debouncer = new_debouncer(
Duration::from_millis(delay),
None,
move |events: Result<Vec<DebouncedEvent>, Vec<notify::Error>>| {
if let Ok(events) = events {
for event in events {
// TODO: Should errors be emitted too?
let _ = on_event.send(event.event);
}
}
},
)?;
for path in &resolved_paths {
debouncer.watch(path, recursive_mode)?;
}
WatcherKind::Debouncer(debouncer)
} else {
let mut watcher = RecommendedWatcher::new(
move |event| {
if let Ok(event) = event {
// TODO: Should errors be emitted too?
let _ = on_event.send(event);
}
},
Config::default(),
)?;
for path in &resolved_paths {
watcher.watch(path, recursive_mode)?;
}
WatcherKind::Watcher(watcher)
};
let rid = webview.resources_table().add(watcher_kind);
Ok(rid)
}