Rust/Wasm on AWS Lambda@Edge

• rust-wasm-on-lambda-edge

  2 24 9.2 Rust

  Rust/WASM on AWS Lambda@Edge (CloudFront)

I adopted a rollup based approach, since it's quite easy to get configured and also something we use at work. I always found webpack a little bit too cumbersome, and parcel is just yet another new kid on the block. I'm pretty sure you can adjust the project to your needs. All we need here is: compile TS to JS and bundle up everything into a single JS file. In the past I found the WebAssembly dependency management very tricky, in the end I used a plain "move the .wasm file into the final bundle" approach, which just works fine, because I did not want to inline the WebAssembly code (as most plugins try). Maybe you have a smarter solution for that, please open a pull-request in the repo. Just keep in mind: wasm-bindgen creates already a pretty decent module loader, so there is no need to work around that, but I fail to get any of these bundlers to move the wasm files along with it into the bundle output directory.

• rs2ts

  1 4 0.0 Rust

  Rust structs and enums to TypeScript interfaces and enums

For a quick baseline test and project I did not go down that road yet, as it would require to replicate all the TS specific stuff in the Rust code (wasm-bindgen cannot do everything fully automated yet). This is a great opportunity to create a utility crate for that, basically like rs2ts but in reverse direction. I wish aws-lambda-events already had those CloudFront events in it, but sadly they don't.

• InfluxDB

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• wasm-bindgen

  44 7,270 9.2 Rust

  Facilitating high-level interactions between Wasm modules and JavaScript

  

For example wasm-bindgen has not a great story around Rust enums, for now only very simple C-style enums are allowed. Meaning: for our CloudFront (CF) event data, which can be more strictly typed into either a CF request or response event, this does not play well with Rust's richer enums, as we cannot convince wasm-bindgen to use them. There is an open issue around this topic, but it was created just recently and thus no work has been done yet. Similarly Rust's Vec is also not fully supported yet (see issue 111), which might be the even bigger issue for some of us.

• serde-wasm-bindgen

  1 532 7.3 Rust

  Native integration of Serde with wasm-bindgen

  

Some transformation overhead can be addressed by using serde-wasm-bindgen, but in my example repo I'll use it only for the input side (deserialization). On serialization a collection like HashMap or BTreeMap gets turned into an ES2015 Map, which is unfortunated as well, because they cannot be JSON stringified.

• TypeScript-Website

  54 2,124 8.9 TypeScript

  The Website and web infrastructure for learning TypeScript

  

TypeScript (TS) for the Node.js part

• wrangler-legacy

  139 3,234 7.3 Rust

  Discontinued 🤠 Home to Wrangler v1 (deprecated)

  

I can tell a bit more about Cloudflare though, because their edge computing offering is available and affordable to small businesses and individuals (even free in most cases). Check out Workers, really do! I have already played around with Workers and KV storage, it's a quite pleasant experience. I might write about a setup for them in the future as well.

• webpack

  330 64,160 9.8 JavaScript

  A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows for loading parts of the application on demand. Through "loaders", modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.

  

The size restriction can be mitigated for JS-only code pretty easily by bundling the code with WebPack, Parcel, or Rollup. General advise is anyway to never deploy the unoptimized package especially when you want to push it to the edge. The node_modules folder grows very big, can still have quite some bloat even after an npm prune --production, because it only looks at packages, but not the content of them. Yep, my minimalism brain kicked in again.

• WorkOS

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• wasm-pack

  38 5,923 7.0 Rust

  📦✨ your favorite rust -> wasm workflow tool!

  

wasm-pack for WebAssembly building

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