111 lines
3.4 KiB
Rust
111 lines
3.4 KiB
Rust
use ruffle_core::backend::storage::StorageBackend;
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use std::fs;
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use std::fs::File;
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use std::io::Write;
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use std::path::{Component, Path, PathBuf};
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pub struct DiskStorageBackend {
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base_path: PathBuf,
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shared_objects_path: PathBuf,
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}
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impl DiskStorageBackend {
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pub fn new() -> Self {
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let base_path = dirs::data_local_dir().unwrap().join("ruffle");
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let shared_objects_path = base_path.join("SharedObjects");
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// Create a base dir if one doesn't exist yet
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if !shared_objects_path.exists() {
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log::info!("Creating storage dir");
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if let Err(r) = fs::create_dir_all(&base_path) {
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log::warn!("Unable to create storage dir {}", r);
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}
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}
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DiskStorageBackend {
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base_path,
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shared_objects_path,
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}
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}
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/// Verifies that the path contains no `..` components to prevent accessing files outside of the Ruffle directory.
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fn is_path_allowed(path: &Path) -> bool {
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path.components().all(|c| c != Component::ParentDir)
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}
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fn get_shared_object_path(&self, name: &str) -> PathBuf {
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self.shared_objects_path.join(format!("{}.sol", name))
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}
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fn get_back_compat_shared_object_path(&self, name: &str) -> PathBuf {
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// Backwards compatibility with pre-05/09/2021:
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// Search for data in old location, without .sol extension and # prefix.
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// Remove this code eventually.
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self.base_path.join(name.replacen("/#", "/", 1))
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}
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}
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impl StorageBackend for DiskStorageBackend {
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fn get(&self, name: &str) -> Option<Vec<u8>> {
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let path = self.get_shared_object_path(name);
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if !Self::is_path_allowed(&path) {
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return None;
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}
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match std::fs::read(path) {
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Ok(data) => Some(data),
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Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
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let path = self.get_back_compat_shared_object_path(name);
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match std::fs::read(path) {
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Ok(data) => Some(data),
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Err(e) => {
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log::warn!("Unable to read file {:?}", e);
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None
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}
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}
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}
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Err(e) => {
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log::warn!("Unable to read file {:?}", e);
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None
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}
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}
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}
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fn put(&mut self, name: &str, value: &[u8]) -> bool {
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let path = self.get_shared_object_path(name);
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if !Self::is_path_allowed(&path) {
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return false;
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}
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if let Some(parent_dir) = path.parent() {
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if !parent_dir.exists() {
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if let Err(r) = fs::create_dir_all(&parent_dir) {
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log::warn!("Unable to create storage dir {}", r);
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return false;
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}
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}
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}
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match File::create(path) {
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Ok(mut file) => {
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if let Err(r) = file.write_all(value) {
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log::warn!("Unable to write file content {:?}", r);
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false
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} else {
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true
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}
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}
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Err(r) => {
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log::warn!("Unable to save file {:?}", r);
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false
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}
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}
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}
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fn remove_key(&mut self, name: &str) {
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let path = self.get_shared_object_path(name);
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if !Self::is_path_allowed(&path) {
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return;
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}
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let _ = fs::remove_file(path);
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}
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}
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