Add HTTP and data cacheing for speed

.gitignore

@@ -1,2 +1,3 @@
 /target
 mastodon-data.toml
+http-cacache

Cargo.toml

@@ -18,3 +18,6 @@ chrono = { version = "0.4.22", features = [ "serde" ] }
 rss = { path = "./rss/", version = "2.0.1-atom-link-fix", features = [ "builders", "atom", "chrono" ] }
 pulldown-cmark = "0.9.2"
 atom_syndication = "0.11.0"
+http-cache-reqwest = "0.5.0"
+reqwest-middleware = "0.1.6"
+cached = "0.40.0"

README.md

@@ -19,7 +19,9 @@ ports to use for development and deployment.
 - [ ] More robust parsing (defaults for all!)
 - [ ] RSS feeds for tags
 - [x] Atom Extension pagination support
-- [x] Disable pagination and just go for it lmao
+- [x] Disable pagination
+    - [x] HTTP Cacheing
+    - [x] Data cacheing
 - [ ] Read More support
 - [ ] Dublin Core support
 - [ ] Media Envelope support

src/cohost_account.rs

@@ -3,7 +3,7 @@ use serde::Deserialize;
 /// The API URL from whence Cohost serves JSON project definitions
 pub const COHOST_ACCOUNT_API_URL: &str = "https://cohost.org/api/v1/project/";
 
-#[derive(Debug, Deserialize, PartialEq, Eq)]
+#[derive(Debug, Clone, Deserialize, PartialEq, Eq)]
 pub struct CohostAccount {
     #[serde(rename = "projectId")]
     pub project_id: u64,

src/cohost_posts.rs

@@ -11,7 +11,7 @@ pub fn cohost_posts_api_url(project: impl AsRef<str>, page: u64) -> String {
 
 // Cohost doesn't give us Next links ("rel: next") for further pages, so we'll have to ALWAYS populate the rel=next field
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Clone, Deserialize)]
 pub struct CohostPostsPage {
     #[serde(rename = "nItems")]
     pub number_items: usize,
@@ -22,7 +22,7 @@ pub struct CohostPostsPage {
     pub links: Vec<CohostPostLink>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Clone, Deserialize)]
 pub struct CohostPost {
     #[serde(rename = "postId")]
     pub id: u64,
@@ -50,7 +50,7 @@ pub struct CohostPost {
     pub share_tree: Vec<CohostPost>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Clone, Deserialize)]
 pub struct CohostPostingProject {
     #[serde(rename = "projectId")]
     pub id: u64,
@@ -70,7 +70,7 @@ pub struct CohostPostingProject {
     pub pronouns: String,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Clone, Deserialize)]
 pub struct CohostPostLink {
     #[serde(deserialize_with = "deserialize_null_default", default)]
     pub href: String,

src/main.rs

@@ -3,7 +3,10 @@ use std::collections::HashMap;
 use std::error::Error;
 #[macro_use]
 extern crate rocket;
-use reqwest::{Client, StatusCode};
+use cached::proc_macro::cached;
+use http_cache_reqwest::{CACacheManager, Cache, CacheMode, HttpCache};
+use reqwest::StatusCode;
+use reqwest_middleware::{ClientBuilder, ClientWithMiddleware};
 use rocket::response::content::RawHtml;
 use rocket::serde::json::Json;
 
@@ -40,6 +43,20 @@ fn user_agent() -> String {
 }
 
 static ARGS: once_cell::sync::Lazy<Args> = once_cell::sync::Lazy::new(|| Args::parse());
+static CLIENT: once_cell::sync::Lazy<ClientWithMiddleware> = once_cell::sync::Lazy::new(|| {
+    ClientBuilder::new(
+        reqwest::Client::builder()
+            .user_agent(user_agent())
+            .build()
+            .unwrap(),
+    )
+    .with(Cache(HttpCache {
+        mode: CacheMode::Default,
+        manager: CACacheManager::default(),
+        options: None,
+    }))
+    .build()
+});
 
 #[get("/")]
 fn index() -> RawHtml<&'static str> {
@@ -52,13 +69,13 @@ struct MdResponse {
     inner: String,
 }
 
-#[derive(Responder)]
+#[derive(Debug, Clone, Responder)]
 #[response(content_type = "application/rss+xml")]
 struct RssResponse {
     inner: String,
 }
 
-#[derive(Responder)]
+#[derive(Debug, Responder)]
 #[response(content_type = "text/plain")]
 enum ErrorResponse {
     #[response(status = 404)]
@@ -67,14 +84,11 @@ enum ErrorResponse {
     InternalError(String),
 }
 
-async fn get_post_from_page(
-    client: &mut Client,
-    project_id: &str,
-    post_id: u64,
-) -> Result<CohostPost, ErrorResponse> {
+#[cached(time = 60, result)]
+async fn get_post_from_page(project_id: String, post_id: u64) -> Result<CohostPost, ErrorResponse> {
     let mut page = 0;
     loop {
-        let new_page = get_page_data(client, project_id, page).await?;
+        let new_page = get_page_data(project_id.clone(), page).await?;
         if new_page.items.is_empty() {
             // Once there are no posts, we're done.
             return Err(ErrorResponse::NotFound(
@@ -89,14 +103,12 @@ async fn get_post_from_page(
     }
 }
 
-async fn get_full_post_data(
-    client: &mut Client,
-    project_id: &str,
-) -> Result<CohostPostsPage, ErrorResponse> {
+#[cached(time = 120, result)]
+async fn get_full_post_data(project_id: String) -> Result<CohostPostsPage, ErrorResponse> {
     let mut page = 0;
-    let mut merged_page = get_page_data(client, project_id, page).await?;
+    let mut merged_page = get_page_data(project_id.clone(), page).await?;
     loop {
-        let mut new_page = get_page_data(client, project_id, page).await?;
+        let mut new_page = get_page_data(project_id.clone(), page).await?;
         if new_page.items.is_empty() {
             // Once there are no posts, we're done.
             break;
@@ -109,14 +121,11 @@ async fn get_full_post_data(
     Ok(merged_page)
 }
 
-async fn get_page_data(
-    client: &mut Client,
-    project_id: &str,
-    page: u64,
-) -> Result<CohostPostsPage, ErrorResponse> {
-    let posts_url = cohost_posts_api_url(project_id, page);
+// Not cached because it's never used individually.
+async fn get_page_data(project_id: String, page: u64) -> Result<CohostPostsPage, ErrorResponse> {
+    let posts_url = cohost_posts_api_url(&project_id, page);
     eprintln!("making request to {}", posts_url);
-    match client.get(posts_url).send().await {
+    match CLIENT.get(posts_url).send().await {
         Ok(v) => match v.status() {
             StatusCode::OK => match v.json::<CohostPostsPage>().await {
                 Ok(page_data) => Ok(page_data),
@@ -147,35 +156,11 @@ async fn get_page_data(
     }
 }
 
-#[get("/<project>/feed.rss")]
-async fn syndication_rss_route(project: &str) -> Result<RssResponse, ErrorResponse> {
-    let mut client = get_client()?;
-
-    let project_data = get_project_data(&mut client, project).await?;
-    let page_data = get_full_post_data(&mut client, project).await?;
-    Ok(RssResponse {
-        inner: syndication::channel_for_posts_page(project, project_data, page_data).to_string(),
-    })
-}
-
-#[get("/<project>/<id>")]
-async fn post_md_route(project: &str, id: u64) -> Result<MdResponse, ErrorResponse> {
-    let mut client = get_client()?;
-
-    let _project_data = get_project_data(&mut client, project).await?;
-    let post_data = get_post_from_page(&mut client, project, id).await?;
-    Ok(MdResponse {
-        inner: post_data.plain_body,
-    })
-}
-
-async fn get_project_data(
-    client: &mut Client,
-    project_id: &str,
-) -> Result<CohostAccount, ErrorResponse> {
+#[cached(time = 60, result)]
+async fn get_project_data(project_id: String) -> Result<CohostAccount, ErrorResponse> {
     let project_url = format!("{}{}", COHOST_ACCOUNT_API_URL, project_id);
     eprintln!("making request to {}", project_url);
-    match client.get(project_url).send().await {
+    match CLIENT.get(project_url).send().await {
         Ok(v) => match v.status() {
             StatusCode::OK => match v.json::<CohostAccount>().await {
                 Ok(a) => Ok(a),
@@ -209,15 +194,23 @@ async fn get_project_data(
     }
 }
 
-fn get_client() -> Result<Client, ErrorResponse> {
-    match Client::builder().user_agent(user_agent()).build() {
-        Ok(v) => Ok(v),
-        Err(e) => {
-            let err = format!("Couldn't build a reqwest client: {:?}", e);
-            eprintln!("{}", err);
-            Err(ErrorResponse::InternalError(err))
-        }
-    }
+#[get("/<project>/feed.rss")]
+async fn syndication_rss_route(project: String) -> Result<RssResponse, ErrorResponse> {
+    let project_data = get_project_data(project.clone()).await?;
+    let page_data = get_full_post_data(project.clone()).await?;
+    Ok(RssResponse {
+        inner: syndication::channel_for_posts_page(project.clone(), project_data, page_data)
+            .to_string(),
+    })
+}
+
+#[get("/<project>/<id>")]
+async fn post_md_route(project: String, id: u64) -> Result<MdResponse, ErrorResponse> {
+    let _project_data = get_project_data(project.clone()).await?;
+    let post_data = get_post_from_page(project.clone(), id).await?;
+    Ok(MdResponse {
+        inner: post_data.plain_body,
+    })
 }
 
 #[get("/.well-known/webfinger?<params..>")]
@@ -232,9 +225,8 @@ async fn webfinger_route(
         eprintln!("{}", err);
         return Err(ErrorResponse::InternalError(err));
     }
-    let mut client = get_client()?;
     if let Some(param) = params.iter().next() {
-        let _project_data = get_project_data(&mut client, param.0.as_str()).await?;
+        let _project_data = get_project_data(param.0.clone()).await?;
         Ok(Json(CohostWebfingerResource::new(
             param.0.as_str(),
             &ARGS.domain,