Initial Auth Impl + More Caching (#647)

* Port redis to staging

* redis cache on staging

* add back legacy auth callback

* Begin work on new auth flows

* Finish all auth flows

* Finish base session authentication

* run prep + fix clippy

* make compilation work

src/util/ext.rs

@@ -9,6 +9,17 @@ pub fn get_image_content_type(extension: &str) -> Option<&'static str> {
     }
 }
 
+pub fn get_image_ext(content_type: &str) -> Option<&'static str> {
+    match content_type {
+        "image/bmp" => Some("bmp"),
+        "image/gif" => Some("gif"),
+        "image/jpeg" => Some("jpg"),
+        "image/png" => Some("png"),
+        "image/webp" => Some("webp"),
+        _ => None,
+    }
+}
+
 pub fn project_file_type(ext: &str) -> Option<&str> {
     match ext {
         "jar" => Some("application/java-archive"),