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88 lines
2.8 KiB
Rust
88 lines
2.8 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::generic_error;
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use deno_core::error::AnyError;
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use deno_core::op2;
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use deno_core::url::Url;
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use deno_core::OpState;
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use deno_fs::FileSystemRc;
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use node_resolver::NodeResolution;
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use std::borrow::Cow;
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use std::path::Path;
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use std::path::PathBuf;
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use crate::NodePermissions;
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use crate::NodeRequireResolverRc;
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use crate::NodeResolverRc;
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#[must_use = "the resolved return value to mitigate time-of-check to time-of-use issues"]
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fn ensure_read_permission<'a, P>(
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state: &mut OpState,
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file_path: &'a Path,
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) -> Result<Cow<'a, Path>, AnyError>
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where
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P: NodePermissions + 'static,
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{
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let resolver = state.borrow::<NodeRequireResolverRc>().clone();
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let permissions = state.borrow_mut::<P>();
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resolver.ensure_read_permission(permissions, file_path)
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}
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#[op2]
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#[string]
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pub fn op_worker_threads_filename<P>(
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state: &mut OpState,
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#[string] specifier: String,
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) -> Result<String, AnyError>
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where
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P: NodePermissions + 'static,
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{
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if specifier.starts_with("data:") {
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return Ok(specifier);
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}
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let url: Url = if specifier.starts_with("file:") {
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Url::parse(&specifier)?
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} else {
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let path = PathBuf::from(&specifier);
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if path.is_relative() && !specifier.starts_with('.') {
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return Err(generic_error(
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"Relative path entries must start with '.' or '..'",
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));
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}
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let path = ensure_read_permission::<P>(state, &path)?;
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let fs = state.borrow::<FileSystemRc>();
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let canonicalized_path =
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deno_path_util::strip_unc_prefix(fs.realpath_sync(&path)?);
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Url::from_file_path(canonicalized_path)
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.map_err(|e| generic_error(format!("URL from Path-String: {:#?}", e)))?
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};
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let url_path = url
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.to_file_path()
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.map_err(|e| generic_error(format!("URL to Path-String: {:#?}", e)))?;
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let url_path = ensure_read_permission::<P>(state, &url_path)?;
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let fs = state.borrow::<FileSystemRc>();
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if !fs.exists_sync(&url_path) {
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return Err(generic_error(format!("File not found [{:?}]", url_path)));
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}
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let node_resolver = state.borrow::<NodeResolverRc>();
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match node_resolver.url_to_node_resolution(url)? {
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NodeResolution::Esm(u) => Ok(u.to_string()),
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NodeResolution::CommonJs(u) => wrap_cjs(u),
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NodeResolution::BuiltIn(_) => Err(generic_error("Neither ESM nor CJS")),
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}
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}
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///
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/// Wrap a CJS file-URL and the required setup in a stringified `data:`-URL
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///
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fn wrap_cjs(url: Url) -> Result<String, AnyError> {
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let path = url
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.to_file_path()
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.map_err(|e| generic_error(format!("URL to Path: {:#?}", e)))?;
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let filename = path.file_name().unwrap().to_string_lossy();
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Ok(format!(
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"data:text/javascript,import {{ createRequire }} from \"node:module\";\
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const require = createRequire(\"{}\"); require(\"./{}\");",
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url, filename,
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))
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}
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