Ephemeral sidecar system #2930
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| Original file line number | Diff line number | Diff line change |
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| //! List ephemeral sidecars query | ||
| //! | ||
| //! Returns all sidecars (thumbnails, previews, etc.) for a specific ephemeral | ||
| //! entry. Scans the temp directory to find what derivatives exist. | ||
| use crate::{ | ||
| context::CoreContext, | ||
| infra::query::{CoreQuery, QueryResult}, | ||
| }; | ||
| use serde::{Deserialize, Serialize}; | ||
| use specta::Type; | ||
| use std::{path::PathBuf, sync::Arc}; | ||
| use uuid::Uuid; | ||
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Contributor
There was a problem hiding this comment. Unused import. |
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| /// Input for listing ephemeral sidecars | ||
| #[derive(Debug, Clone, Serialize, Deserialize, Type)] | ||
| pub struct ListEphemeralSidecarsInput { | ||
| /// Entry UUID to list sidecars for | ||
| pub entry_uuid: Uuid, | ||
| /// Library ID | ||
| pub library_id: Uuid, | ||
| } | ||
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| /// Information about a single ephemeral sidecar | ||
| #[derive(Debug, Clone, Serialize, Deserialize, Type)] | ||
| pub struct EphemeralSidecarInfo { | ||
| /// Sidecar kind (e.g., "thumb", "preview", "transcript") | ||
| pub kind: String, | ||
| /// Sidecar variant (e.g., "grid@1x", "detail@2x") | ||
| pub variant: String, | ||
| /// File format (e.g., "webp", "mp4", "txt") | ||
| pub format: String, | ||
| /// File size in bytes | ||
| pub size: u64, | ||
| /// Relative path within temp directory (for debugging) | ||
| pub path: String, | ||
| } | ||
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| /// Output containing ephemeral sidecar information | ||
| #[derive(Debug, Clone, Serialize, Deserialize, Type)] | ||
| pub struct ListEphemeralSidecarsOutput { | ||
| /// List of sidecars found for this entry | ||
| pub sidecars: Vec<EphemeralSidecarInfo>, | ||
| /// Total number of sidecars | ||
| pub total: usize, | ||
| } | ||
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| #[derive(Debug, Clone, Serialize, Deserialize, Type)] | ||
| pub struct ListEphemeralSidecarsQuery { | ||
| input: ListEphemeralSidecarsInput, | ||
| } | ||
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| impl CoreQuery for ListEphemeralSidecarsQuery { | ||
| type Input = ListEphemeralSidecarsInput; | ||
| type Output = ListEphemeralSidecarsOutput; | ||
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| fn from_input(input: Self::Input) -> QueryResult<Self> { | ||
| Ok(Self { input }) | ||
| } | ||
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| async fn execute( | ||
| self, | ||
| context: Arc<CoreContext>, | ||
| _session: crate::infra::api::SessionContext, | ||
| ) -> QueryResult<Self::Output> { | ||
| let cache = context.ephemeral_cache(); | ||
| let sidecar_cache = cache.get_sidecar_cache(self.input.library_id); | ||
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| // Get the entry directory | ||
| let entry_dir = sidecar_cache.compute_entry_dir(&self.input.entry_uuid); | ||
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| if !tokio::fs::try_exists(&entry_dir).await? { | ||
| return Ok(ListEphemeralSidecarsOutput { | ||
| sidecars: Vec::new(), | ||
| total: 0, | ||
| }); | ||
| } | ||
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| let mut sidecars = Vec::new(); | ||
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| // Scan the entry directory for sidecar kind directories | ||
| let mut read_dir = tokio::fs::read_dir(&entry_dir).await?; | ||
| while let Some(kind_entry) = read_dir.next_entry().await? { | ||
| let kind_name = kind_entry.file_name().to_string_lossy().to_string(); | ||
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| // Convert plural back to singular (thumbs -> thumb, etc.) | ||
| let kind = if kind_name == "transcript" { | ||
| kind_name.clone() | ||
| } else { | ||
| kind_name.trim_end_matches('s').to_string() | ||
| }; | ||
|
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| // Scan files within the kind directory | ||
| let mut files_dir = tokio::fs::read_dir(kind_entry.path()).await?; | ||
| while let Some(file_entry) = files_dir.next_entry().await? { | ||
| let filename = file_entry.file_name().to_string_lossy().to_string(); | ||
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| // Parse filename as "variant.format" | ||
| if let Some((variant, format)) = filename.rsplit_once('.') { | ||
| let metadata = file_entry.metadata().await?; | ||
| let relative_path = file_entry | ||
| .path() | ||
| .strip_prefix(sidecar_cache.temp_root()) | ||
| .unwrap_or(&file_entry.path()) | ||
| .to_string_lossy() | ||
| .to_string(); | ||
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| sidecars.push(EphemeralSidecarInfo { | ||
| kind: kind.clone(), | ||
| variant: variant.to_string(), | ||
| format: format.to_string(), | ||
| size: metadata.len(), | ||
| path: relative_path, | ||
| }); | ||
| } | ||
| } | ||
| } | ||
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| let total = sidecars.len(); | ||
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| Ok(ListEphemeralSidecarsOutput { sidecars, total }) | ||
| } | ||
| } | ||
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| crate::register_core_query!(ListEphemeralSidecarsQuery, "core.ephemeral_sidecars.list"); | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| //! Ephemeral sidecar operations | ||
| //! | ||
| //! Queries and actions for managing ephemeral sidecars (thumbnails, previews, | ||
| //! etc.) for ephemeral entries. Unlike managed sidecars which are persistent | ||
| //! and database-tracked, ephemeral sidecars live in temp storage and are | ||
| //! queried directly from the filesystem. | ||
|
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| pub mod list_query; | ||
| pub mod request_action; | ||
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| pub use list_query::{ListEphemeralSidecarsInput, ListEphemeralSidecarsOutput}; | ||
| pub use request_action::{RequestEphemeralThumbnailsInput, RequestEphemeralThumbnailsOutput}; |
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Directory traversal check ineffective on non-canonicalized paths
The
serve_ephemeral_sidecarfunction usesstarts_withon a non-canonicalized path to prevent directory traversal, but this check is ineffective. URL path segments likeentry_uuidorvariant_and_extcan contain..sequences (URL-encoded as%2E%2E). Thestarts_withmethod compares path components literally, so a path like/tmp/.../entry/../../../etc/passwdpasses the check because its first components matchtemp_root, even thoughFile::openwill resolve the..components and access files outside the intended directory. An attacker could read arbitrary files accessible to the server process.