Cache post data using sled
Each post fetch was taking 800ms TAT, so I'm using sled to fetch and cache post data. This reduced TAT down to 2ms. However, this could cause storage issues. I must design some sort of resource manager to clean up cache.
This commit is contained in:
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133c4a96b3
commit
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GPG Key ID:
AD9F0F08E855ED88
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@ -1 +1,2 @@
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/target
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posts_cache
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@ -304,6 +304,15 @@ version = "0.13.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
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[[package]]
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name = "bincode"
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version = "1.3.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
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dependencies = [
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"serde 1.0.130",
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]
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[[package]]
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name = "bitflags"
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version = "1.3.2"
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@ -480,6 +489,29 @@ dependencies = [
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"cfg-if",
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]
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[[package]]
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name = "crossbeam-epoch"
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version = "0.9.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4ec02e091aa634e2c3ada4a392989e7c3116673ef0ac5b72232439094d73b7fd"
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dependencies = [
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"cfg-if",
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"crossbeam-utils",
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"lazy_static",
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"memoffset",
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"scopeguard",
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]
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[[package]]
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name = "crossbeam-utils"
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version = "0.8.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d82cfc11ce7f2c3faef78d8a684447b40d503d9681acebed6cb728d45940c4db"
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dependencies = [
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"cfg-if",
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"lazy_static",
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]
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[[package]]
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name = "derive_more"
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version = "0.99.16"
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@ -619,6 +651,16 @@ dependencies = [
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"percent-encoding",
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]
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[[package]]
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name = "fs2"
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version = "0.4.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9564fc758e15025b46aa6643b1b77d047d1a56a1aea6e01002ac0c7026876213"
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dependencies = [
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"libc",
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"winapi",
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]
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[[package]]
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name = "futures-channel"
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version = "0.3.17"
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@ -660,6 +702,15 @@ dependencies = [
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"pin-utils",
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]
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[[package]]
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name = "fxhash"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c31b6d751ae2c7f11320402d34e41349dd1016f8d5d45e48c4312bc8625af50c"
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dependencies = [
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"byteorder",
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]
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[[package]]
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name = "generic-array"
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version = "0.14.4"
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@ -983,6 +1034,7 @@ dependencies = [
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"actix-rt",
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"actix-web",
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"actix-web-codegen 0.5.0-beta.4",
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"bincode",
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"chrono",
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"config",
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"derive_more",
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@ -995,6 +1047,7 @@ dependencies = [
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"sailfish",
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"serde 1.0.130",
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"serde_json",
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"sled",
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"url",
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]
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@ -1052,6 +1105,15 @@ version = "2.4.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
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[[package]]
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name = "memoffset"
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version = "0.6.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "59accc507f1338036a0477ef61afdae33cde60840f4dfe481319ce3ad116ddf9"
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dependencies = [
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"autocfg",
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]
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[[package]]
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name = "mime"
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version = "0.3.16"
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@ -1700,6 +1762,22 @@ version = "0.4.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9def91fd1e018fe007022791f865d0ccc9b3a0d5001e01aabb8b40e46000afb5"
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[[package]]
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name = "sled"
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version = "0.34.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7f96b4737c2ce5987354855aed3797279def4ebf734436c6aa4552cf8e169935"
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dependencies = [
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"crc32fast",
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"crossbeam-epoch",
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"crossbeam-utils",
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"fs2",
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"fxhash",
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"libc",
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"log",
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"parking_lot",
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]
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[[package]]
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name = "smallvec"
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version = "1.7.0"
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@ -38,3 +38,6 @@ reqwest = { version = "0.11.6", features = ["json"] }
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graphql_client = { version = "0.10.0", features = ["reqwest"]}
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chrono = "0.4.19"
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sled = "0.34.7"
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bincode = "1.3.3"
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@ -1 +1,3 @@
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delimiter: "."
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optimization:
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rm_whitespace: true
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37
src/data.rs
37
src/data.rs
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@ -15,19 +15,56 @@
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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use actix_web::web;
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use graphql_client::{reqwest::post_graphql, GraphQLQuery};
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use reqwest::Client;
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use sled::{Db, Tree};
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#[derive(Clone)]
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pub struct Data {
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pub client: Client,
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cache: Db,
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pub posts: Tree,
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}
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#[derive(GraphQLQuery)]
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#[graphql(
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schema_path = "schemas/schema.graphql",
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query_path = "schemas/query.graphql",
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response_derives = "Debug, Serialize, Deserialize, Clone"
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)]
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pub struct GetPost;
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pub type PostResp = get_post::GetPostPost;
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pub type AppData = web::Data<Data>;
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impl Data {
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pub fn new() -> AppData {
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let cache = sled::open("posts_cache").unwrap();
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let posts = cache.open_tree("posts").unwrap();
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AppData::new(Self {
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client: Client::new(),
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cache,
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posts,
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})
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}
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pub async fn get_post(&self, id: &str) -> PostResp {
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match self.posts.get(id) {
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Ok(Some(v)) => bincode::deserialize(&v[..]).unwrap(),
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_ => {
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let vars = get_post::Variables { id: id.to_owned() };
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const URL: &str = "https://medium.com/_/graphql";
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let res = post_graphql::<GetPost, _>(&self.client, URL, vars)
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.await
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.unwrap();
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let res = res.data.expect("missing response data").post.unwrap();
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self.posts
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.insert(id, bincode::serialize(&res).unwrap())
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.unwrap();
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res
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}
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}
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}
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}
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28
src/proxy.rs
28
src/proxy.rs
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@ -17,9 +17,9 @@
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use std::ops::{Bound, RangeBounds};
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use actix_web::{web, HttpResponse, Responder};
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use graphql_client::{reqwest::post_graphql, GraphQLQuery};
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use sailfish::TemplateOnce;
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use crate::data::PostResp;
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use crate::AppData;
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pub mod routes {
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@ -95,18 +95,11 @@ impl StringUtils for str {
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}
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}
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#[derive(GraphQLQuery)]
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#[graphql(
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schema_path = "schemas/schema.graphql",
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query_path = "schemas/query.graphql",
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response_derives = "Debug"
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)]
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struct GetPost;
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#[derive(TemplateOnce)]
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#[template(path = "post.html")]
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#[template(rm_whitespace = true)]
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pub struct Post {
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pub data: get_post::GetPostPost,
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pub data: PostResp,
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pub id: String,
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}
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@ -125,20 +118,11 @@ async fn page(path: web::Path<(String, String)>, data: AppData) -> impl Responde
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if post_id.is_none() {
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return HttpResponse::BadRequest().finish();
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}
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let id = post_id.unwrap().to_string();
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let vars = get_post::Variables { id: id.clone() };
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const URL: &str = "https://medium.com/_/graphql";
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let res = post_graphql::<GetPost, _>(&data.client, URL, vars)
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.await
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.unwrap();
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let response_data: get_post::ResponseData = res.data.expect("missing response data");
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let id = post_id.unwrap();
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let page = Post {
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id,
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data: response_data.post.unwrap(),
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id: id.to_owned(),
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data: data.get_post(&id).await,
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}
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.render_once()
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.unwrap();
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@ -34,11 +34,8 @@
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<span><.= text .></span>
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<.}.>
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<.}.>
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<. if cur < p.text.len() {.>
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<.= p.text.slice(cur..) .>
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<.}.>
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<.}.>
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</p>
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<!-- markup.type_ = [ "CODE", "A", "EM", "STRONG" -->
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@ -10,7 +10,6 @@
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<. use chrono::{TimeZone, Utc}; .>
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<. let dt = Utc.timestamp_millis(data.created_at); .>
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<. let date = dt.format("%b %e, %Y").to_string(); .>
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<h1><.= data.title .></h1>
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<p class="meta">
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<a class="author" href="https://medium.com/u/<.= data.creator.id .>" rel="noreferrer">
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@ -29,8 +28,6 @@
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<. if pindex == 0 && p.type_ == "H3" {.>
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<. continue; .>
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<.}.>
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<. if p.type_ == "IMG" {.>
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<. include!("./img.html"); .>
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<.} else if p.type_ == "P" {.>
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@ -46,8 +43,6 @@
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<.} else if p.type_ == "H6" {.>
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<h6><.= p.text .></h6>
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<.}.>
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<.}.>
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</article>
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</main>
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