mirror of
https://github.com/denoland/deno.git
synced 2024-12-13 02:52:54 -05:00
213 lines
6.3 KiB
Rust
213 lines
6.3 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use crate::args::ConfigFile;
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use crate::args::Flags;
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use crate::cache::FetchCacher;
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use crate::graph_util::graph_valid;
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use crate::http_cache;
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use crate::proc_state::ProcState;
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use crate::resolver::ImportMapResolver;
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use crate::resolver::JsxResolver;
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use deno_core::anyhow::anyhow;
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use deno_core::error::AnyError;
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use deno_core::parking_lot::Mutex;
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use deno_core::ModuleSpecifier;
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use deno_runtime::permissions::Permissions;
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use deno_runtime::tokio_util::create_basic_runtime;
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use import_map::ImportMap;
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use std::collections::HashMap;
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use std::fs;
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use std::path::Path;
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use std::path::PathBuf;
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use std::sync::Arc;
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use std::thread;
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use std::time::SystemTime;
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use tokio::sync::mpsc;
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use tokio::sync::oneshot;
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type Request = (
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Vec<(ModuleSpecifier, deno_graph::ModuleKind)>,
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oneshot::Sender<Result<(), AnyError>>,
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);
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/// A "server" that handles requests from the language server to cache modules
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/// in its own thread.
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#[derive(Debug)]
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pub struct CacheServer(mpsc::UnboundedSender<Request>);
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impl CacheServer {
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pub async fn new(
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maybe_cache_path: Option<PathBuf>,
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maybe_import_map: Option<Arc<ImportMap>>,
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maybe_config_file: Option<ConfigFile>,
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maybe_ca_stores: Option<Vec<String>>,
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maybe_ca_file: Option<String>,
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unsafely_ignore_certificate_errors: Option<Vec<String>>,
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) -> Self {
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let (tx, mut rx) = mpsc::unbounded_channel::<Request>();
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let _join_handle = thread::spawn(move || {
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let runtime = create_basic_runtime();
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runtime.block_on(async {
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let ps = ProcState::build(Flags {
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cache_path: maybe_cache_path,
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ca_stores: maybe_ca_stores,
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ca_file: maybe_ca_file,
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unsafely_ignore_certificate_errors,
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..Default::default()
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})
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.await
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.unwrap();
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let maybe_import_map_resolver =
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maybe_import_map.map(ImportMapResolver::new);
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let maybe_jsx_resolver = maybe_config_file.as_ref().and_then(|cf| {
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cf.to_maybe_jsx_import_source_module()
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.map(|im| JsxResolver::new(im, maybe_import_map_resolver.clone()))
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});
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let maybe_resolver = if maybe_jsx_resolver.is_some() {
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maybe_jsx_resolver.as_ref().map(|jr| jr.as_resolver())
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} else {
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maybe_import_map_resolver
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.as_ref()
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.map(|im| im.as_resolver())
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};
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let maybe_imports = maybe_config_file
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.and_then(|cf| cf.to_maybe_imports().ok())
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.flatten();
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let mut cache = FetchCacher::new(
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ps.dir.gen_cache.clone(),
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ps.file_fetcher.clone(),
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Permissions::allow_all(),
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Permissions::allow_all(),
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);
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while let Some((roots, tx)) = rx.recv().await {
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let graph = deno_graph::create_graph(
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roots,
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false,
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maybe_imports.clone(),
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&mut cache,
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maybe_resolver,
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None,
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None,
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None,
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)
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.await;
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if tx.send(graph_valid(&graph, true, false)).is_err() {
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log::warn!("cannot send to client");
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}
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}
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})
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});
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Self(tx)
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}
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/// Attempt to cache the supplied module specifiers and their dependencies in
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/// the current DENO_DIR, returning any errors, so they can be returned to the
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/// client.
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pub async fn cache(
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&self,
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roots: Vec<(ModuleSpecifier, deno_graph::ModuleKind)>,
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) -> Result<(), AnyError> {
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let (tx, rx) = oneshot::channel::<Result<(), AnyError>>();
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if self.0.send((roots, tx)).is_err() {
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return Err(anyhow!("failed to send request to cache thread"));
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}
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rx.await?
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}
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}
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/// Calculate a version for for a given path.
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pub fn calculate_fs_version(path: &Path) -> Option<String> {
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let metadata = fs::metadata(path).ok()?;
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if let Ok(modified) = metadata.modified() {
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if let Ok(n) = modified.duration_since(SystemTime::UNIX_EPOCH) {
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Some(n.as_millis().to_string())
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} else {
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Some("1".to_string())
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}
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} else {
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Some("1".to_string())
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}
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}
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/// Populate the metadata map based on the supplied headers
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fn parse_metadata(
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headers: &HashMap<String, String>,
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) -> HashMap<MetadataKey, String> {
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let mut metadata = HashMap::new();
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if let Some(warning) = headers.get("x-deno-warning").cloned() {
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metadata.insert(MetadataKey::Warning, warning);
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}
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metadata
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}
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#[derive(Debug, PartialEq, Eq, Hash)]
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pub enum MetadataKey {
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/// Represent the `x-deno-warning` header associated with the document
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Warning,
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}
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#[derive(Debug, Clone)]
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struct Metadata {
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values: Arc<HashMap<MetadataKey, String>>,
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version: Option<String>,
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}
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#[derive(Debug, Default, Clone)]
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pub struct CacheMetadata {
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cache: http_cache::HttpCache,
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metadata: Arc<Mutex<HashMap<ModuleSpecifier, Metadata>>>,
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}
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impl CacheMetadata {
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pub fn new(location: &Path) -> Self {
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Self {
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cache: http_cache::HttpCache::new(location),
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metadata: Default::default(),
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}
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}
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/// Return the meta data associated with the specifier. Unlike the `get()`
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/// method, redirects of the supplied specifier will not be followed.
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pub fn get(
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&self,
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specifier: &ModuleSpecifier,
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) -> Option<Arc<HashMap<MetadataKey, String>>> {
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if specifier.scheme() == "file" {
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return None;
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}
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let version = self
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.cache
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.get_cache_filename(specifier)
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.and_then(|ref path| calculate_fs_version(path));
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let metadata = self.metadata.lock().get(specifier).cloned();
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if metadata.as_ref().and_then(|m| m.version.clone()) != version {
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self.refresh(specifier).map(|m| m.values)
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} else {
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metadata.map(|m| m.values)
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}
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}
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fn refresh(&self, specifier: &ModuleSpecifier) -> Option<Metadata> {
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if specifier.scheme() == "file" {
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return None;
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}
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let cache_filename = self.cache.get_cache_filename(specifier)?;
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let specifier_metadata =
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http_cache::Metadata::read(&cache_filename).ok()?;
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let values = Arc::new(parse_metadata(&specifier_metadata.headers));
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let version = calculate_fs_version(&cache_filename);
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let mut metadata_map = self.metadata.lock();
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let metadata = Metadata { values, version };
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metadata_map.insert(specifier.clone(), metadata.clone());
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Some(metadata)
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}
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pub fn set_location(&mut self, location: &Path) {
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self.cache = http_cache::HttpCache::new(location);
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self.metadata.lock().clear();
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}
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}
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