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Linda_pp
January 27, 2020
Programming
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500
port-monolith-to-wasm-for-chrome-extension
Presented at Rust LT #8
https://rust.connpass.com/event/160225/
Linda_pp
January 27, 2020
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Transcript
Monolith Λ Wasm ʹҠ২͠ ͯ Chrome ֦ுͭͬͨ͘ at Rust LT
#8 (2020/1/27) @Linda_pp @rhysd
monolith https://github.com/Y2Z/monolith
monolith • ࢦఆͨ͠ URL ͷϖʔδΛ1ͭͷ HTML ϖʔδͱ ͯ͠อଘ͢Δ CLI πʔϧ
• ϨεϙϯγϒͳϖʔδͳͲී௨ͷΣϒϖʔδ ͱͯͦ͠ͷ··ϩʔΧϧʹอଘͰ͖Δ • HTML ϖʔδΛύʔε͠ɼϦιʔεΛऔ͖ͬͯͯ Data URL ͱͯ͠ຒΊࠐΉ͜ͱͰ࣮͞Ε͍ͯΔ
monolith-of-web https://github.com/rhysd/monolith-of-web
monolith-of-web • monolith Λ wasm ʹҠ২͠ɼChrome ֦ுͱ ͯ͠ϒϥβ͔Β͑ΔΑ͏ʹͨ͠ͷ • ϒϥζ͍ͯ͠Δϖʔδͷ
HTML Λͦͷ·· ୯Ұͷ HTML ϖʔδʹͯ͠อଘͰ͖Δ
σϞ
:; NPOPMJUI SIZTE NPOPMJUI NPOPMJUIOQN QBDLBHF NPOPMJUIPGXFC CBDLHSPVOEQBHF GPSL XBTNQBDL
JOTUBOUJBUF
େ·͔ͳ wasm ͷҠ২ͷखॱ • wasm-pack buid ͕௨ΔΑ͏ʹ͢Δɽwasm ະରԠͷϞδϡʔ ϧ͕͋Δ߹#[cfg(target_arch =
"wasm32")] ͰॲཧΛ͚ Δ • wasm-bindgen Λ͍ɼ#[wasm_bindgen] Ͱ JS ଆʹݟͤΔ API Λఆٛ͢Δ #[cfg(not(target_arch = "wasm32"))] use reqwest::blocking::Client; #[wasm_bindgen(js_name = monolithOfUrl)] pub async fn monolith_of_url( url_target: String, options: MonolithOptions, ) -> Result<String, JsValue> { // ... }
network ϦΫΤετ • monolith Ϧιʔεͷ fetch ͷͨΊʹ reqwest ͷϒϩοΩ ϯά
API Λ͍ͬͯΔ • JavaScript ͷ fetch() ͱ async-await Λͬͯॻ͖͑ • js_sys::Promise std::future::Future ͷม؆୯ʹͰ͖Δ use wasm_bindgen_futures::JsFuture; let window = web_sys::window().unwrap(); let resp_value = JsFuture::from( window.fetch_with_request(&request) ).await?; let resp: Response = resp_value.dyn_into().unwrap();
࠶ؼؔͷ async-await Խ • ࠶ؼؔ await ࣌ʹอଘ͓ͯ͘͠ঢ়ଶͷαΠζ͕੩తʹ ܾ·Βͳ͍ͷͰɼasync ؔʹͰ͖ͳ͍ɽ •
monolith Ͱ DOM Λ࠶ؼతʹࠪ͠ͳ͕ΒϦιʔεΛ fetch ͍ͯͨ͠ͷͰɼ͜ͷΛ౿ΜͰ͍ͨ // ίϯύΠϧΤϥʔ async fn recursive() { recursive().await; recursive().await; }
࠶ؼؔͷ async-await Խ • ঢ়ଶʢFutureʣΛ Box ʹೖΕͯಈతʹཧ͢Δ͜ͱͰճ ආͰ͖Δ use std::pin::Pin;
use std::future::Future; fn recursive<'a>() -> Pin<Box<dyn Future<Output = ()> + 'a>> { Box::pin(async move { recursive().await; recursive().await; }) }
·ͱΊ • Rust ͷ CLI πʔϧ monolith Λ wasm ʹҠ
২ͯ͠ Chrome ֦ுʹͯ͠Έͨ • https://github.com/rhysd/monolith-of-web • async-await wasm Ͱ wasm_bindgen_futures Ͱ؆୯ʹ͑Δ @Linda_pp @rhysd presented by