First pass at HTTP imports

Implement --reload

Integrate hyper errors into DenoError

In collaboration with Tommy Savaria <tommy.savaria@protonmail.ch>

src/net.rs

@@ -0,0 +1,29 @@
+use errors::DenoResult;
+use hyper::rt::{Future, Stream};
+use hyper::{Client, Uri};
+use tokio::runtime::current_thread::Runtime;
+
+// The CodeFetch message is used to load HTTP javascript resources and expects a
+// synchronous response, this utility method supports that.
+pub fn fetch_sync_string(module_name: &str) -> DenoResult<String> {
+  let url = module_name.parse::<Uri>().unwrap();
+  let client = Client::new();
+
+  // TODO Use Deno's RT
+  let mut rt = Runtime::new().unwrap();
+
+  let body = rt.block_on(
+    client
+      .get(url)
+      .and_then(|response| response.into_body().concat2()),
+  )?;
+  Ok(String::from_utf8(body.to_vec()).unwrap())
+}
+
+#[test]
+fn test_fetch_sync_string() {
+  // Relies on external http server. See tools/http_server.py
+  let p = fetch_sync_string("http://localhost:4545/package.json").unwrap();
+  println!("package.json len {}", p.len());
+  assert!(p.len() > 1);
+}