Leptos SSR in Cloudflare worker #1659

9oelM · 2023-09-06T11:50:59Z

9oelM
Sep 6, 2023

Hi.

Is it possible to use Cloudflare worker instead of axum/actix/viz for SSR as of today? Or do I need to create a whole new thing like https://github.com/leptos-rs/leptos/tree/main/integrations/axum or https://github.com/leptos-rs/leptos/tree/main/integrations/actix or https://github.com/leptos-rs/leptos/tree/main/integrations/viz to get it working because Cloudflare worker is another kind of backend?

Also apart from that, would there be anything unique to Cloudflare workers that should be implemented in order to get dehydration done in the worker?

Actually while debugging under Cloudflare worker setup with Rust, I noticed that wasm32 target is not feasible to be used because ssr is disabled by #![cfg(not(all(target_arch = "wasm32", feature = "web")))] at leptos::ssr (or leptos_dom::ssr, same thing):

leptos/leptos_dom/src/ssr.rs

Line 1 in 2798dc4

#![cfg(not(all(target_arch = "wasm32", feature = "web")))]

But cf worker (wrangler) obviously has wasm32 as a target. so it cannot import ssr module. But actually I'm not sure why I can't import because my feature doesn't include "web".

So my questions are:

so i can't use basic functions like ssr::render_to_stream. any idea how to get around that?
what is the relevance of this discussion to seanaye/feat/js fetch #1554?
what else needs to be done to make basic SSR work under wasm32 target arch?

FYI, I have looked at https://github.com/perry-birch/leptos-cloudflare and https://github.com/seanaye/leptos-deno but couldn't really get them to work with the latest version of leptos, which is 0.4.9.