feat(extensions/fetch): extend init options (denoland#11528)

extensions/fetch/lib.rs

@@ -60,6 +60,7 @@ pub fn init<P: FetchPermissions + 'static>(
  user_agent: String,
  ca_data: Option<Vec<u8>>,
  proxy: Option<Proxy>,
+ frozen_headers: Option<HeaderMap>,
 ) -> Extension {
  Extension::builder()
  .js(include_js_files!(
@@ -89,6 +90,7 @@ pub fn init<P: FetchPermissions + 'static>(
  ca_data: ca_data.clone(),
  user_agent: user_agent.clone(),
  proxy: proxy.clone(),
+ frozen_headers: frozen_headers.clone(),
  });
  Ok(())
  })
@@ -99,6 +101,7 @@ pub struct HttpClientDefaults {
  pub user_agent: String,
  pub ca_data: Option<Vec<u8>>,
  pub proxy: Option<Proxy>,
+ pub frozen_headers: Option<HeaderMap>,
 }
 
 pub trait FetchPermissions {
@@ -214,6 +217,15 @@ where
  }
  }
 
+ // Set frozen_headers after the user provided headers, so the
+ // end user can't override them.
+ let defaults = state.borrow::<HttpClientDefaults>();
+ if let Some(frozen_headers) = &defaults.frozen_headers {
+ for (key, value) in frozen_headers {
+ request = request.header(key, value)
+ }
+ }
+
  let cancel_handle = CancelHandle::new_rc();
  let cancel_handle_ = cancel_handle.clone();
 

runtime/build.rs

@@ -46,6 +46,7 @@ fn create_runtime_snapshot(snapshot_path: &Path, files: Vec<PathBuf>) {
  "".to_owned(),
  None,
  None,
+ None,
  ),
  deno_websocket::init::<deno_websocket::NoWebSocketPermissions>(
  "".to_owned(),

runtime/web_worker.rs

@@ -301,6 +301,7 @@ impl WebWorker {
  options.user_agent.clone(),
  options.ca_data.clone(),
  None,
+ None,
  ),
  deno_websocket::init::<Permissions>(
  options.user_agent.clone(),

runtime/worker.rs

@@ -101,6 +101,7 @@ impl MainWorker {
  options.user_agent.clone(),
  options.ca_data.clone(),
  None,
+ None,
  ),
  deno_websocket::init::<Permissions>(
  options.user_agent.clone(),