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Xref paths saved in a drawing (on open, on Reload, in the External References list, XOPEN, nested xrefs) and table data-link paths re-read by DATALINKUPDATE go through doc_path::resolve (craft-docpath): relative paths resolve beside the drawing that stores them, and paths to other computers, devices and URLs are not opened. Such an xref is Unresolved with the reason, unless a file of its name is beside the host drawing. Paths given to XATTACH, -XREF Path and DATALINK are used as given. One load of xrefs reads at most 1 GB from referenced files in total.
39 lines
1.9 KiB
Rust
39 lines
1.9 KiB
Rust
//! Paths stored in a drawing: xref paths and table data links.
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//!
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//! Such a path reaches the file system only through [`resolve`]: a relative path is taken from
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//! the drawing's folder, and only files on this computer, or on the network share the drawing
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//! itself is on, are opened (see `craft_docpath`). A refused path is handled like a missing file,
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//! with the reason in its status. Paths the user gives a command (XATTACH, -XREF Path, DATALINK)
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//! are their own choice and are used as given.
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use std::path::{Path, PathBuf};
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pub use craft_docpath::Refused;
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/// The file to open for `stored`, a path or `file:` URL stored in the drawing saved at
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/// `document` (`None` for a drawing without a file).
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///
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/// A result that isn't absolute is refused as [`Refused::Invalid`]: without a document a
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/// relative path would depend on the working directory, and a Windows drive path names no file
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/// on other platforms.
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pub fn resolve(stored: &str, document: Option<&Path>) -> Result<PathBuf, Refused> {
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let document = document.filter(|d| !d.as_os_str().is_empty()).map(|d| std::path::absolute(d).unwrap_or_else(|_| d.to_path_buf()));
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let path = craft_docpath::resolve(stored.trim(), document.as_deref())?;
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if path.is_absolute() { Ok(path) } else { Err(Refused::Invalid) }
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn relative_paths_resolve_beside_the_drawing_and_other_computers_are_refused() {
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let doc = std::env::temp_dir().join("plans").join("host.dxf");
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assert_eq!(resolve("parts/a.dxf", Some(&doc)), Ok(std::env::temp_dir().join("plans").join("parts").join("a.dxf")));
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assert_eq!(resolve("a.dxf", None), Err(Refused::Invalid));
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assert_eq!(resolve(r"\\192.0.2.1\share\a.dxf", Some(&doc)), Err(Refused::Network));
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assert_eq!(resolve("file://192.0.2.1/s/a.dxf", Some(&doc)), Err(Refused::Network));
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assert_eq!(resolve("//192.0.2.1/s/a.dxf", None), Err(Refused::Network));
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}
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}
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