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76 lines
2.1 KiB
Rust
76 lines
2.1 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::AnyError;
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use deno_core::serde::Deserialize;
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use deno_core::serde::Serialize;
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use deno_core::url::Url;
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use std::path::PathBuf;
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use std::time::SystemTime;
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use crate::http_util::HeadersMap;
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mod common;
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mod global;
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mod local;
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pub use global::url_to_filename;
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pub use global::GlobalHttpCache;
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pub use local::LocalHttpCache;
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/// Cached metadata about a url.
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#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
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pub struct CachedUrlMetadata {
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pub headers: HeadersMap,
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pub url: String,
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#[serde(default = "SystemTime::now", rename = "now")]
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pub time: SystemTime,
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}
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impl CachedUrlMetadata {
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pub fn is_redirect(&self) -> bool {
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self.headers.contains_key("location")
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}
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}
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/// Computed cache key, which can help reduce the work of computing the cache key multiple times.
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pub struct HttpCacheItemKey<'a> {
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// The key is specific to the implementation of HttpCache,
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// so keep these private to the module. For example, the
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// fact that these may be stored in a file is an implementation
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// detail.
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#[cfg(debug_assertions)]
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pub(super) is_local_key: bool,
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pub(super) url: &'a Url,
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/// This will be set all the time for the global cache, but it
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/// won't ever be set for the local cache because that also needs
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/// header information to determine the final path.
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pub(super) file_path: Option<PathBuf>,
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}
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pub trait HttpCache: Send + Sync + std::fmt::Debug {
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/// A pre-computed key for looking up items in the cache.
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fn cache_item_key<'a>(
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&self,
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url: &'a Url,
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) -> Result<HttpCacheItemKey<'a>, AnyError>;
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fn contains(&self, url: &Url) -> bool;
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fn set(
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&self,
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url: &Url,
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headers: HeadersMap,
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content: &[u8],
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) -> Result<(), AnyError>;
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fn read_modified_time(
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&self,
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key: &HttpCacheItemKey,
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) -> Result<Option<SystemTime>, AnyError>;
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fn read_file_bytes(
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&self,
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key: &HttpCacheItemKey,
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) -> Result<Option<Vec<u8>>, AnyError>;
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fn read_metadata(
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&self,
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key: &HttpCacheItemKey,
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) -> Result<Option<CachedUrlMetadata>, AnyError>;
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}
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