mirror of
https://github.com/denoland/deno.git
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b4e42953e1
Co-authored-by: Aaron O'Mullan <aaron.omullan@gmail.com>
167 lines
5.1 KiB
Rust
167 lines
5.1 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use crate::web_worker::WebWorkerInternalHandle;
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use crate::web_worker::WebWorkerType;
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use deno_core::error::type_error;
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use deno_core::error::AnyError;
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use deno_core::op;
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use deno_core::url::Url;
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use deno_core::OpState;
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use deno_fetch::data_url::DataUrl;
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use deno_fetch::reqwest;
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use deno_web::BlobStore;
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use deno_websocket::DomExceptionNetworkError;
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use hyper::body::Bytes;
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use serde::{Deserialize, Serialize};
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use tokio::task::JoinHandle;
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// TODO(andreubotella) Properly parse the MIME type
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fn mime_type_essence(mime_type: &str) -> String {
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let essence = match mime_type.split_once(';') {
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Some((essence, _)) => essence,
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None => mime_type,
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};
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essence.trim().to_ascii_lowercase()
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}
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#[derive(Serialize, Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct SyncFetchScript {
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url: String,
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script: String,
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}
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#[op]
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pub fn op_worker_sync_fetch(
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state: &mut OpState,
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scripts: Vec<String>,
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mut loose_mime_checks: bool,
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) -> Result<Vec<SyncFetchScript>, AnyError> {
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let handle = state.borrow::<WebWorkerInternalHandle>().clone();
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assert_eq!(handle.worker_type, WebWorkerType::Classic);
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let client = state.borrow::<reqwest::Client>().clone();
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// TODO(andreubotella) It's not good to throw an exception related to blob
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// URLs when none of the script URLs use the blob scheme.
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// Also, in which contexts are blob URLs not supported?
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let blob_store = state
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.try_borrow::<BlobStore>()
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.ok_or_else(|| type_error("Blob URLs are not supported in this context."))?
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.clone();
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// TODO(andreubotella): make the below thread into a resource that can be
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// re-used. This would allow parallel fecthing of multiple scripts.
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let thread = std::thread::spawn(move || {
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let runtime = tokio::runtime::Builder::new_current_thread()
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.enable_io()
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.enable_time()
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.build()
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.unwrap();
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let handles: Vec<_> = scripts
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.into_iter()
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.map(|script| -> JoinHandle<Result<SyncFetchScript, AnyError>> {
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let client = client.clone();
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let blob_store = blob_store.clone();
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runtime.spawn(async move {
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let script_url = Url::parse(&script)
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.map_err(|_| type_error("Invalid script URL"))?;
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let (body, mime_type, res_url) = match script_url.scheme() {
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"http" | "https" => {
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let resp =
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client.get(script_url).send().await?.error_for_status()?;
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let res_url = resp.url().to_string();
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// TODO(andreubotella) Properly run fetch's "extract a MIME type".
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let mime_type = resp
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.headers()
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.get("Content-Type")
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.and_then(|v| v.to_str().ok())
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.map(mime_type_essence);
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// Always check the MIME type with HTTP(S).
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loose_mime_checks = false;
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let body = resp.bytes().await?;
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(body, mime_type, res_url)
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}
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"data" => {
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let data_url = DataUrl::process(&script)
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.map_err(|e| type_error(format!("{:?}", e)))?;
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let mime_type = {
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let mime = data_url.mime_type();
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format!("{}/{}", mime.type_, mime.subtype)
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};
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let (body, _) = data_url
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.decode_to_vec()
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.map_err(|e| type_error(format!("{:?}", e)))?;
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(Bytes::from(body), Some(mime_type), script)
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}
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"blob" => {
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let blob =
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blob_store.get_object_url(script_url)?.ok_or_else(|| {
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type_error("Blob for the given URL not found.")
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})?;
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let mime_type = mime_type_essence(&blob.media_type);
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let body = blob.read_all().await?;
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(Bytes::from(body), Some(mime_type), script)
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}
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_ => {
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return Err(type_error(format!(
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"Classic scripts with scheme {}: are not supported in workers.",
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script_url.scheme()
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)))
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}
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};
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if !loose_mime_checks {
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// TODO(andreubotella) Check properly for a Javascript MIME type.
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match mime_type.as_deref() {
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Some("application/javascript" | "text/javascript") => {}
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Some(mime_type) => {
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return Err(
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DomExceptionNetworkError {
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msg: format!("Invalid MIME type {:?}.", mime_type),
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}
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.into(),
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)
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}
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None => {
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return Err(
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DomExceptionNetworkError::new("Missing MIME type.").into(),
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)
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}
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}
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}
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let (text, _) = encoding_rs::UTF_8.decode_with_bom_removal(&body);
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Ok(SyncFetchScript {
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url: res_url,
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script: text.into_owned(),
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})
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})
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})
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.collect();
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let mut ret = Vec::with_capacity(handles.len());
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for handle in handles {
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let script = runtime.block_on(handle)??;
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ret.push(script);
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}
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Ok(ret)
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});
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thread.join().unwrap()
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}
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