diff --git a/src/frontend/rest/assets.rs b/src/frontend/rest/assets.rs
index d019fab..66090c3 100644
--- a/src/frontend/rest/assets.rs
+++ b/src/frontend/rest/assets.rs
@@ -2,7 +2,8 @@
 
 extern crate mime_guess;
 
-use self::mime_guess::{get_mime_type, octet_stream};
+use self::mime_guess::mime::APPLICATION_OCTET_STREAM;
+use self::mime_guess::from_ext;
 
 macro_rules! include_files_as_assets {
     ( $target_match:expr, $( $file_name:expr ),* ) => {
@@ -23,9 +24,9 @@ pub fn file_from_string(file_path: &str) -> Option<(String, &'static [u8])> {
         Some(ext_ptr) => {
             let ext = &file_path[ext_ptr + 1..];
 
-            get_mime_type(ext)
+            from_ext(ext).first_or_octet_stream()
         }
-        None => octet_stream(),
+        None => APPLICATION_OCTET_STREAM,
     };
 
     let string_mime = guessed_mime.to_string();
diff --git a/src/frontend/rest/services/attributes.rs b/src/frontend/rest/services/attributes.rs
index 267d1c4..0ef61d9 100644
--- a/src/frontend/rest/services/attributes.rs
+++ b/src/frontend/rest/services/attributes.rs
@@ -3,7 +3,6 @@
 //! The /api/attr call returns an executable script containing session variables.
 
 use frontend::rest::services::default_future;
-use frontend::rest::services::encapsulate_json;
 use frontend::rest::services::Future;
 use frontend::rest::services::Request;
 use frontend::rest::services::Response;
@@ -16,13 +15,10 @@ use logging::LoggingErrors;
 pub fn handle(service: &WebService, _req: Request) -> Future {
     let framework = service.get_framework_read();
 
-    let file = encapsulate_json(
-        "base_attributes",
-        &framework
+    let file = framework
             .base_attributes
             .to_json_str()
-            .log_expect("Failed to render JSON representation of config"),
-    );
+            .log_expect("Failed to render JSON representation of config");
 
     default_future(
         Response::new()
diff --git a/src/frontend/ui/mod.rs b/src/frontend/ui/mod.rs
index 7750690..ddda882 100644
--- a/src/frontend/ui/mod.rs
+++ b/src/frontend/ui/mod.rs
@@ -45,7 +45,7 @@ pub fn start_ui(app_name: &str, http_address: &str, is_launcher: bool) {
                         if new_path.to_string_lossy().len() > 0 {
                             let result = serde_json::to_string(&new_path)
                                 .log_expect("Unable to serialize response");
-                            let command = format!("{}({});", callback_name, result);
+                            let command = format!("window.{}({});", callback_name, result);
                             debug!("Injecting response: {}", command);
                             cb_result = wv.eval(&command);
                         }
diff --git a/ui/src/main.js b/ui/src/main.js
index d0b938f..110eb54 100644
--- a/ui/src/main.js
+++ b/ui/src/main.js
@@ -81,9 +81,11 @@ axios.get('/api/attrs').then(function (resp) {
   console.error(err)
 })
 
-// function selectFileCallback (name) {
-//   app.install_location = name
-// }
+function selectFileCallback (name) {
+  app.install_location = name
+}
+
+window.selectFileCallback = selectFileCallback
 
 var app = new Vue({
   router: router,