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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use crate::file_fetcher::map_content_type;
use crate::media_type::MediaType;
use deno_core::error::AnyError;
use deno_core::url::Url;
use deno_core::ModuleSpecifier;
use std::collections::HashMap;
/// This is a partial guess as how URLs get encoded from the LSP. We want to
/// encode URLs sent to the LSP in the same way that they would be encoded back
/// so that we have the same return encoding.
const LSP_ENCODING: &percent_encoding::AsciiSet = &percent_encoding::CONTROLS
.add(b':')
.add(b';')
.add(b'=')
.add(b'@')
.add(b'[')
.add(b'\\')
.add(b']')
.add(b'^')
.add(b'|');
fn hash_data_specifier(specifier: &ModuleSpecifier) -> String {
let mut file_name_str = specifier.path().to_string();
if let Some(query) = specifier.query() {
file_name_str.push('?');
file_name_str.push_str(query);
}
crate::checksum::gen(&[file_name_str.as_bytes()])
}
fn data_url_media_type(specifier: &ModuleSpecifier) -> MediaType {
let path = specifier.path();
let mut parts = path.splitn(2, ',');
let media_type_part =
percent_encoding::percent_decode_str(parts.next().unwrap())
.decode_utf8_lossy();
let (media_type, _) =
map_content_type(specifier, Some(media_type_part.into()));
media_type
}
/// A bi-directional map of URLs sent to the LSP client and internal module
/// specifiers. We need to map internal specifiers into `deno:` schema URLs
/// to allow the Deno language server to manage these as virtual documents.
#[derive(Debug, Default)]
pub struct LspUrlMap {
specifier_to_url: HashMap<ModuleSpecifier, Url>,
url_to_specifier: HashMap<Url, ModuleSpecifier>,
}
impl LspUrlMap {
fn put(&mut self, specifier: ModuleSpecifier, url: Url) {
self.specifier_to_url.insert(specifier.clone(), url.clone());
self.url_to_specifier.insert(url, specifier);
}
fn get_url(&self, specifier: &ModuleSpecifier) -> Option<&Url> {
self.specifier_to_url.get(specifier)
}
fn get_specifier(&self, url: &Url) -> Option<&ModuleSpecifier> {
self.url_to_specifier.get(url)
}
/// Normalize a specifier that is used internally within Deno (or tsc) to a
/// URL that can be handled as a "virtual" document by an LSP client.
pub fn normalize_specifier(
&mut self,
specifier: &ModuleSpecifier,
) -> Result<Url, AnyError> {
if let Some(url) = self.get_url(specifier) {
Ok(url.clone())
} else {
let url = if specifier.scheme() == "file" {
specifier.clone()
} else {
let specifier_str = if specifier.scheme() == "data" {
let media_type = data_url_media_type(specifier);
let extension = if media_type == MediaType::Unknown {
""
} else {
media_type.as_ts_extension()
};
format!(
"deno:/{}/data_url{}",
hash_data_specifier(specifier),
extension
)
} else {
let path = specifier.as_str().replacen("://", "/", 1);
let path = percent_encoding::utf8_percent_encode(&path, LSP_ENCODING);
format!("deno:/{}", path)
};
let url = Url::parse(&specifier_str)?;
self.put(specifier.clone(), url.clone());
url
};
Ok(url)
}
}
/// Normalize URLs from the client, where "virtual" `deno:///` URLs are
/// converted into proper module specifiers.
pub fn normalize_url(&self, url: &Url) -> ModuleSpecifier {
if let Some(specifier) = self.get_specifier(url) {
specifier.clone()
} else {
url.clone()
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use deno_core::resolve_url;
#[test]
fn test_hash_data_specifier() {
let fixture = resolve_url("data:application/typescript;base64,ZXhwb3J0IGNvbnN0IGEgPSAiYSI7CgpleHBvcnQgZW51bSBBIHsKICBBLAogIEIsCiAgQywKfQo=").unwrap();
let actual = hash_data_specifier(&fixture);
assert_eq!(
actual,
"c21c7fc382b2b0553dc0864aa81a3acacfb7b3d1285ab5ae76da6abec213fb37"
);
}
#[test]
fn test_data_url_media_type() {
let fixture = resolve_url("data:application/typescript;base64,ZXhwb3J0IGNvbnN0IGEgPSAiYSI7CgpleHBvcnQgZW51bSBBIHsKICBBLAogIEIsCiAgQywKfQo=").unwrap();
let actual = data_url_media_type(&fixture);
assert_eq!(actual, MediaType::TypeScript);
let fixture = resolve_url("data:application/javascript;base64,ZXhwb3J0IGNvbnN0IGEgPSAiYSI7CgpleHBvcnQgZW51bSBBIHsKICBBLAogIEIsCiAgQywKfQo=").unwrap();
let actual = data_url_media_type(&fixture);
assert_eq!(actual, MediaType::JavaScript);
let fixture = resolve_url("data:text/plain;base64,ZXhwb3J0IGNvbnN0IGEgPSAiYSI7CgpleHBvcnQgZW51bSBBIHsKICBBLAogIEIsCiAgQywKfQo=").unwrap();
let actual = data_url_media_type(&fixture);
assert_eq!(actual, MediaType::Unknown);
}
#[test]
fn test_lsp_url_map() {
let mut map = LspUrlMap::default();
let fixture = resolve_url("https://deno.land/x/pkg@1.0.0/mod.ts").unwrap();
let actual_url = map
.normalize_specifier(&fixture)
.expect("could not handle specifier");
let expected_url =
Url::parse("deno:/https/deno.land/x/pkg%401.0.0/mod.ts").unwrap();
assert_eq!(actual_url, expected_url);
let actual_specifier = map.normalize_url(&actual_url);
assert_eq!(actual_specifier, fixture);
}
#[test]
fn test_lsp_url_map_data() {
let mut map = LspUrlMap::default();
let fixture = resolve_url("data:application/typescript;base64,ZXhwb3J0IGNvbnN0IGEgPSAiYSI7CgpleHBvcnQgZW51bSBBIHsKICBBLAogIEIsCiAgQywKfQo=").unwrap();
let actual_url = map
.normalize_specifier(&fixture)
.expect("could not handle specifier");
let expected_url = Url::parse("deno:/c21c7fc382b2b0553dc0864aa81a3acacfb7b3d1285ab5ae76da6abec213fb37/data_url.ts").unwrap();
assert_eq!(actual_url, expected_url);
let actual_specifier = map.normalize_url(&actual_url);
assert_eq!(actual_specifier, fixture);
}
}
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