scramjet/rewriter/src/lib.rs
2024-07-28 21:45:41 -04:00

87 lines
2.4 KiB
Rust

pub mod rewrite;
use std::{panic, str::FromStr};
use js_sys::{Function, Object, Reflect};
use rewrite::{rewrite, Config, EncodeFn};
use url::Url;
use wasm_bindgen::prelude::*;
#[wasm_bindgen]
extern "C" {
#[wasm_bindgen(js_namespace = console)]
fn log(s: &str);
}
#[wasm_bindgen]
pub fn init() {
panic::set_hook(Box::new(console_error_panic_hook::hook));
}
fn create_encode_function(encode: Function) -> EncodeFn {
Box::new(move |str| {
encode
.call1(&JsValue::NULL, &str.into())
.unwrap()
.as_string()
.unwrap()
.to_string()
})
}
#[wasm_bindgen]
pub fn rewrite_js(js: &str, url: &str, config: Object) -> Vec<u8> {
rewrite(
js,
Url::from_str(url).unwrap(),
Config {
prefix: Reflect::get(&config, &"prefix".into())
.unwrap()
.as_string()
.unwrap(),
encode: create_encode_function(Reflect::get(&config, &"encode".into()).unwrap().into()),
wrapfn: Reflect::get(&config, &"wrapfn".into())
.unwrap()
.as_string()
.unwrap(),
importfn: Reflect::get(&config, &"importfn".into())
.unwrap()
.as_string()
.unwrap(),
rewritefn: Reflect::get(&config, &"rewritefn".into())
.unwrap()
.as_string()
.unwrap(),
},
)
}
#[wasm_bindgen]
pub fn rewrite_js_from_arraybuffer(js: &[u8], url: &str, config: Object) -> Vec<u8> {
// we know that this is a valid utf-8 string
let js = unsafe { std::str::from_utf8_unchecked(js) };
rewrite(
js,
Url::from_str(url).unwrap(),
Config {
prefix: Reflect::get(&config, &"prefix".into())
.unwrap()
.as_string()
.unwrap(),
encode: create_encode_function(Reflect::get(&config, &"encode".into()).unwrap().into()),
wrapfn: Reflect::get(&config, &"wrapfn".into())
.unwrap()
.as_string()
.unwrap(),
importfn: Reflect::get(&config, &"importfn".into())
.unwrap()
.as_string()
.unwrap(),
rewritefn: Reflect::get(&config, &"rewritefn".into())
.unwrap()
.as_string()
.unwrap(),
},
)
}