Transition to ureq http client (#5777)

* Transition to ureq http client

* Remove unwrap

validator/src/main.rs

@@ -66,17 +66,19 @@ fn download_tar_bz2(
     let progress_bar = new_spinner_progress_bar();
     progress_bar.set_message(&format!("{}Downloading {}...", TRUCK, url));
 
-    let client = reqwest::Client::new();
-    let response = client
-        .get(url.as_str())
-        .send()
-        .and_then(|response| response.error_for_status())
-        .map_err(|err| format!("Unable to get: {:?}", err))?;
+    let client = ureq::agent();
+    let response = client.get(url.as_str()).call();
+    if response.error() {
+        let error = if let Some(err) = response.synthetic_error().as_ref() {
+            format!("Unable to get: {:?}", err)
+        } else {
+            "Unable to get: unspecified error".to_string()
+        };
+        Err(error)?
+    }
     let download_size = {
         response
-            .headers()
-            .get(reqwest::header::CONTENT_LENGTH)
-            .and_then(|content_length| content_length.to_str().ok())
+            .header("Content-Length")
             .and_then(|content_length| content_length.parse().ok())
             .unwrap_or(0)
     };
@@ -109,7 +111,7 @@ fn download_tar_bz2(
 
     let mut source = DownloadProgress {
         progress_bar,
-        response,
+        response: response.into_reader(),
     };
 
     let mut file = File::create(&temp_archive_path)