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|
use crate::fs as deno_fs;
use std::ffi::OsStr;
use std::fs;
use std::path::Component;
use std::path::Path;
use std::path::PathBuf;
use std::path::Prefix;
use std::str;
use url::Url;
#[derive(Clone)]
pub struct DiskCache {
pub location: PathBuf,
}
fn with_io_context<T: AsRef<str>>(
e: &std::io::Error,
context: T,
) -> std::io::Error {
std::io::Error::new(e.kind(), format!("{} (for '{}')", e, context.as_ref()))
}
impl DiskCache {
pub fn new(location: &Path) -> Self {
// TODO: ensure that 'location' is a directory
Self {
location: location.to_owned(),
}
}
pub fn get_cache_filename(&self, url: &Url) -> PathBuf {
let mut out = PathBuf::new();
let scheme = url.scheme();
out.push(scheme);
match scheme {
"http" | "https" => {
let host = url.host_str().unwrap();
let host_port = match url.port() {
// Windows doesn't support ":" in filenames, so we represent port using a
// special string.
Some(port) => format!("{}_PORT{}", host, port),
None => host.to_string(),
};
out.push(host_port);
for path_seg in url.path_segments().unwrap() {
out.push(path_seg);
}
}
"file" => {
let path = url.to_file_path().unwrap();
let mut path_components = path.components();
if cfg!(target_os = "windows") {
if let Some(Component::Prefix(prefix_component)) =
path_components.next()
{
// Windows doesn't support ":" in filenames, so we need to extract disk prefix
// Example: file:///C:/deno/js/unit_test_runner.ts
// it should produce: file\c\deno\js\unit_test_runner.ts
match prefix_component.kind() {
Prefix::Disk(disk_byte) | Prefix::VerbatimDisk(disk_byte) => {
let disk = (disk_byte as char).to_string();
out.push(disk);
}
_ => unreachable!(),
}
}
}
// Must be relative, so strip forward slash
let mut remaining_components = path_components.as_path();
if let Ok(stripped) = remaining_components.strip_prefix("/") {
remaining_components = stripped;
};
out = out.join(remaining_components);
}
scheme => {
unimplemented!(
"Don't know how to create cache name for scheme: {}",
scheme
);
}
};
out
}
pub fn get_cache_filename_with_extension(
&self,
url: &Url,
extension: &str,
) -> PathBuf {
let base = self.get_cache_filename(url);
match base.extension() {
None => base.with_extension(extension),
Some(ext) => {
let original_extension = OsStr::to_str(ext).unwrap();
let final_extension = format!("{}.{}", original_extension, extension);
base.with_extension(final_extension)
}
}
}
pub fn get(&self, filename: &Path) -> std::io::Result<Vec<u8>> {
let path = self.location.join(filename);
fs::read(&path)
}
pub fn set(&self, filename: &Path, data: &[u8]) -> std::io::Result<()> {
let path = self.location.join(filename);
match path.parent() {
Some(ref parent) => fs::create_dir_all(parent)
.map_err(|e| with_io_context(&e, format!("{:#?}", &path))),
None => Ok(()),
}?;
deno_fs::write_file(&path, data, 0o666)
.map_err(|e| with_io_context(&e, format!("{:#?}", &path)))
}
pub fn remove(&self, filename: &Path) -> std::io::Result<()> {
let path = self.location.join(filename);
fs::remove_file(path)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_get_cache_filename() {
let cache_location = if cfg!(target_os = "windows") {
PathBuf::from(r"C:\deno_dir\")
} else {
PathBuf::from("/deno_dir/")
};
let cache = DiskCache::new(&cache_location);
let mut test_cases = vec![
(
"http://deno.land/std/http/file_server.ts",
"http/deno.land/std/http/file_server.ts",
),
(
"http://localhost:8000/std/http/file_server.ts",
"http/localhost_PORT8000/std/http/file_server.ts",
),
(
"https://deno.land/std/http/file_server.ts",
"https/deno.land/std/http/file_server.ts",
),
];
if cfg!(target_os = "windows") {
test_cases.push(("file:///D:/a/1/s/format.ts", "file/D/a/1/s/format.ts"));
} else {
test_cases.push((
"file:///std/http/file_server.ts",
"file/std/http/file_server.ts",
));
}
for test_case in &test_cases {
let cache_filename =
cache.get_cache_filename(&Url::parse(test_case.0).unwrap());
assert_eq!(cache_filename, PathBuf::from(test_case.1));
}
}
#[test]
fn test_get_cache_filename_with_extension() {
let cache = DiskCache::new(&PathBuf::from("foo"));
let mut test_cases = vec![
(
"http://deno.land/std/http/file_server.ts",
"js",
"http/deno.land/std/http/file_server.ts.js",
),
(
"http://deno.land/std/http/file_server.ts",
"js.map",
"http/deno.land/std/http/file_server.ts.js.map",
),
];
if cfg!(target_os = "windows") {
test_cases.push((
"file:///D:/std/http/file_server",
"js",
"file/D/std/http/file_server.js",
));
} else {
test_cases.push((
"file:///std/http/file_server",
"js",
"file/std/http/file_server.js",
));
}
for test_case in &test_cases {
assert_eq!(
cache.get_cache_filename_with_extension(
&Url::parse(test_case.0).unwrap(),
test_case.1
),
PathBuf::from(test_case.2)
)
}
}
}
|
