mirror of
https://github.com/denoland/deno.git
synced 2024-12-27 01:29:14 -05:00
386 lines
10 KiB
Rust
386 lines
10 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use std::cell::RefCell;
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use std::path::PathBuf;
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use std::rc::Rc;
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use std::sync::Arc;
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use async_trait::async_trait;
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use deno_core::error::AnyError;
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use deno_core::op2;
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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::ByteString;
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use deno_core::OpState;
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use deno_core::Resource;
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use deno_core::ResourceId;
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mod sqlite;
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pub use sqlite::SqliteBackedCache;
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#[derive(Clone)]
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pub struct CreateCache<C: Cache + 'static>(pub Arc<dyn Fn() -> C>);
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deno_core::extension!(deno_cache,
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deps = [ deno_webidl, deno_web, deno_url, deno_fetch ],
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parameters=[CA: Cache],
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ops = [
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op_cache_storage_open<CA>,
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op_cache_storage_has<CA>,
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op_cache_storage_delete<CA>,
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op_cache_put<CA>,
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op_cache_put_finish<CA>,
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op_cache_match<CA>,
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op_cache_delete<CA>,
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],
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esm = [ "01_cache.js" ],
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options = {
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maybe_create_cache: Option<CreateCache<CA>>,
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},
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state = |state, options| {
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if let Some(create_cache) = options.maybe_create_cache {
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state.put(create_cache);
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}
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},
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);
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pub fn get_declaration() -> PathBuf {
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PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_cache.d.ts")
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}
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#[derive(Deserialize, Serialize, Debug, Clone)]
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#[serde(rename_all = "camelCase")]
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pub struct CachePutRequest {
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pub cache_id: i64,
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pub request_url: String,
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pub request_headers: Vec<(ByteString, ByteString)>,
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pub response_headers: Vec<(ByteString, ByteString)>,
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pub response_has_body: bool,
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pub response_status: u16,
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pub response_status_text: String,
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}
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#[derive(Deserialize, Serialize, Debug)]
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#[serde(rename_all = "camelCase")]
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pub struct CacheMatchRequest {
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pub cache_id: i64,
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pub request_url: String,
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pub request_headers: Vec<(ByteString, ByteString)>,
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}
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#[derive(Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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pub struct CacheMatchResponse(CacheMatchResponseMeta, Option<ResourceId>);
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#[derive(Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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pub struct CacheMatchResponseMeta {
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pub response_status: u16,
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pub response_status_text: String,
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pub request_headers: Vec<(ByteString, ByteString)>,
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pub response_headers: Vec<(ByteString, ByteString)>,
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}
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#[derive(Deserialize, Serialize, Debug)]
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#[serde(rename_all = "camelCase")]
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pub struct CacheDeleteRequest {
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pub cache_id: i64,
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pub request_url: String,
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}
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#[async_trait(?Send)]
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pub trait Cache: Clone + 'static {
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type CachePutResourceType: Resource;
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async fn storage_open(&self, cache_name: String) -> Result<i64, AnyError>;
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async fn storage_has(&self, cache_name: String) -> Result<bool, AnyError>;
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async fn storage_delete(&self, cache_name: String) -> Result<bool, AnyError>;
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/// Create a put request.
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async fn put_create(
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&self,
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request_response: CachePutRequest,
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) -> Result<Option<Rc<Self::CachePutResourceType>>, AnyError>;
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/// Complete a put request.
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async fn put_finish(
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&self,
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resource: Rc<Self::CachePutResourceType>,
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) -> Result<(), AnyError>;
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async fn r#match(
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&self,
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request: CacheMatchRequest,
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) -> Result<
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Option<(CacheMatchResponseMeta, Option<Rc<dyn Resource>>)>,
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AnyError,
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>;
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async fn delete(&self, request: CacheDeleteRequest)
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-> Result<bool, AnyError>;
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}
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#[op2(async)]
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#[number]
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pub async fn op_cache_storage_open<CA>(
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state: Rc<RefCell<OpState>>,
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#[string] cache_name: String,
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) -> Result<i64, AnyError>
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where
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CA: Cache,
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{
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let cache = get_cache::<CA>(&state)?;
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cache.storage_open(cache_name).await
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}
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#[op2(async)]
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pub async fn op_cache_storage_has<CA>(
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state: Rc<RefCell<OpState>>,
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#[string] cache_name: String,
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) -> Result<bool, AnyError>
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where
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CA: Cache,
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{
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let cache = get_cache::<CA>(&state)?;
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cache.storage_has(cache_name).await
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}
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#[op2(async)]
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pub async fn op_cache_storage_delete<CA>(
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state: Rc<RefCell<OpState>>,
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#[string] cache_name: String,
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) -> Result<bool, AnyError>
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where
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CA: Cache,
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{
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let cache = get_cache::<CA>(&state)?;
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cache.storage_delete(cache_name).await
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}
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#[op2(async)]
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#[smi]
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pub async fn op_cache_put<CA>(
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state: Rc<RefCell<OpState>>,
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#[serde] request_response: CachePutRequest,
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) -> Result<Option<ResourceId>, AnyError>
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where
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CA: Cache,
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{
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let cache = get_cache::<CA>(&state)?;
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match cache.put_create(request_response).await? {
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Some(resource) => {
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let rid = state.borrow_mut().resource_table.add_rc_dyn(resource);
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Ok(Some(rid))
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}
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None => Ok(None),
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}
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}
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#[op2(async)]
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pub async fn op_cache_put_finish<CA>(
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state: Rc<RefCell<OpState>>,
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#[smi] rid: ResourceId,
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) -> Result<(), AnyError>
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where
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CA: Cache,
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{
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let cache = get_cache::<CA>(&state)?;
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let resource = state
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.borrow_mut()
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.resource_table
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.get::<CA::CachePutResourceType>(rid)?;
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cache.put_finish(resource).await
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}
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#[op2(async)]
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#[serde]
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pub async fn op_cache_match<CA>(
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state: Rc<RefCell<OpState>>,
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#[serde] request: CacheMatchRequest,
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) -> Result<Option<CacheMatchResponse>, AnyError>
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where
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CA: Cache,
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{
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let cache = get_cache::<CA>(&state)?;
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match cache.r#match(request).await? {
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Some((meta, None)) => Ok(Some(CacheMatchResponse(meta, None))),
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Some((meta, Some(resource))) => {
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let rid = state.borrow_mut().resource_table.add_rc_dyn(resource);
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Ok(Some(CacheMatchResponse(meta, Some(rid))))
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}
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None => Ok(None),
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}
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}
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#[op2(async)]
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pub async fn op_cache_delete<CA>(
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state: Rc<RefCell<OpState>>,
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#[serde] request: CacheDeleteRequest,
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) -> Result<bool, AnyError>
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where
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CA: Cache,
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{
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let cache = get_cache::<CA>(&state)?;
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cache.delete(request).await
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}
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pub fn get_cache<CA>(state: &Rc<RefCell<OpState>>) -> Result<CA, AnyError>
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where
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CA: Cache,
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{
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let mut state = state.borrow_mut();
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if let Some(cache) = state.try_borrow::<CA>() {
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Ok(cache.clone())
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} else {
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let create_cache = state.borrow::<CreateCache<CA>>().clone();
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let cache = create_cache.0();
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state.put(cache);
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Ok(state.borrow::<CA>().clone())
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}
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}
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/// Check if headers, mentioned in the vary header, of query request
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/// and cached request are equal.
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pub fn vary_header_matches(
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vary_header: &ByteString,
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query_request_headers: &[(ByteString, ByteString)],
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cached_request_headers: &[(ByteString, ByteString)],
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) -> bool {
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let vary_header = match std::str::from_utf8(vary_header) {
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Ok(vary_header) => vary_header,
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Err(_) => return false,
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};
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let headers = get_headers_from_vary_header(vary_header);
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for header in headers {
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let query_header = get_header(&header, query_request_headers);
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let cached_header = get_header(&header, cached_request_headers);
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if query_header != cached_header {
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return false;
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}
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}
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true
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}
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#[test]
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fn test_vary_header_matches() {
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let vary_header = ByteString::from("accept-encoding");
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let query_request_headers = vec![(
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ByteString::from("accept-encoding"),
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ByteString::from("gzip"),
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)];
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let cached_request_headers = vec![(
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ByteString::from("accept-encoding"),
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ByteString::from("gzip"),
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)];
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assert!(vary_header_matches(
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&vary_header,
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&query_request_headers,
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&cached_request_headers
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));
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let vary_header = ByteString::from("accept-encoding");
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let query_request_headers = vec![(
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ByteString::from("accept-encoding"),
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ByteString::from("gzip"),
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)];
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let cached_request_headers =
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vec![(ByteString::from("accept-encoding"), ByteString::from("br"))];
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assert!(!vary_header_matches(
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&vary_header,
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&query_request_headers,
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&cached_request_headers
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));
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}
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/// Get headers from the vary header.
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pub fn get_headers_from_vary_header(vary_header: &str) -> Vec<String> {
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vary_header
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.split(',')
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.map(|s| s.trim().to_lowercase())
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.collect()
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}
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#[test]
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fn test_get_headers_from_vary_header() {
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let headers = get_headers_from_vary_header("accept-encoding");
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assert_eq!(headers, vec!["accept-encoding"]);
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let headers = get_headers_from_vary_header("accept-encoding, user-agent");
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assert_eq!(headers, vec!["accept-encoding", "user-agent"]);
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}
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/// Get value for the header with the given name.
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pub fn get_header(
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name: &str,
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headers: &[(ByteString, ByteString)],
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) -> Option<ByteString> {
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headers
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.iter()
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.find(|(k, _)| {
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if let Ok(k) = std::str::from_utf8(k) {
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k.eq_ignore_ascii_case(name)
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} else {
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false
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}
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})
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.map(|(_, v)| v.to_owned())
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}
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#[test]
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fn test_get_header() {
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let headers = vec![
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(
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ByteString::from("accept-encoding"),
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ByteString::from("gzip"),
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),
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(
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ByteString::from("content-type"),
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ByteString::from("application/json"),
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),
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(
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ByteString::from("vary"),
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ByteString::from("accept-encoding"),
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),
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];
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let value = get_header("accept-encoding", &headers);
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assert_eq!(value, Some(ByteString::from("gzip")));
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let value = get_header("content-type", &headers);
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assert_eq!(value, Some(ByteString::from("application/json")));
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let value = get_header("vary", &headers);
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assert_eq!(value, Some(ByteString::from("accept-encoding")));
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}
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/// Serialize headers into bytes.
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pub fn serialize_headers(headers: &[(ByteString, ByteString)]) -> Vec<u8> {
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let mut serialized_headers = Vec::new();
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for (name, value) in headers {
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serialized_headers.extend_from_slice(name);
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serialized_headers.extend_from_slice(b"\r\n");
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serialized_headers.extend_from_slice(value);
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serialized_headers.extend_from_slice(b"\r\n");
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}
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serialized_headers
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}
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/// Deserialize bytes into headers.
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pub fn deserialize_headers(
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serialized_headers: &[u8],
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) -> Vec<(ByteString, ByteString)> {
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let mut headers = Vec::new();
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let mut piece = None;
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let mut start = 0;
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for (i, byte) in serialized_headers.iter().enumerate() {
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if byte == &b'\r' && serialized_headers.get(i + 1) == Some(&b'\n') {
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if piece.is_none() {
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piece = Some(start..i);
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} else {
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let name = piece.unwrap();
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let value = start..i;
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headers.push((
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ByteString::from(&serialized_headers[name]),
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ByteString::from(&serialized_headers[value]),
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));
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piece = None;
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}
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start = i + 2;
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}
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}
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assert!(piece.is_none());
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assert_eq!(start, serialized_headers.len());
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headers
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}
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