Rustic cleanups, dedups and making the code less hard to read in general (#251)

* typos :help_me:

* (part 1/?) massive cleanup to make the code more Rust-ic and cut down heap allocations.

* (part 2/?) massive cleanup to make the code more Rust-ic and cut down heap allocations.

* (part 3/?) cut down some pretty major heap allocations here - more Bytes and BytesMuts, less Vec<u8>s

also I don't really understand why you need to `to_vec` when you don't really use it again afterwards

* (part 4/?) deduplicate error handling in backblaze logic

* (part 5/?) fixes, cleanups, refactors, and reformatting

* (part 6/?) cleanups and refactors

* remove loads of `as_str` in types that already are `Display`

* Revert "remove loads of `as_str` in types that already are `Display`"

This reverts commit 4f974310cfb167ceba03001d81388db4f0fbb509.

* reformat and move routes util to the util module

* use streams

* Run prepare + formatting issues

Co-authored-by: Jai A <jaiagr+gpg@pm.me>
Co-authored-by: Geometrically <18202329+Geometrically@users.noreply.github.com>

src/file_hosting/backblaze.rs

@@ -1,5 +1,8 @@
 use super::{DeleteFileData, FileHost, FileHostingError, UploadFileData};
 use async_trait::async_trait;
+use bytes::Bytes;
+use reqwest::Response;
+use serde::Deserialize;
 use sha2::Digest;
 
 mod authorization;
@@ -31,7 +34,7 @@ impl FileHost for BackblazeHost {
         &self,
         content_type: &str,
         file_name: &str,
-        file_bytes: Vec<u8>,
+        file_bytes: Bytes,
     ) -> Result<UploadFileData, FileHostingError> {
         let content_sha512 = format!("{:x}", sha2::Sha512::digest(&file_bytes));
 
@@ -79,3 +82,14 @@ impl FileHost for BackblazeHost {
         })
     }
 }
+
+pub async fn process_response<T>(response: Response) -> Result<T, FileHostingError>
+where
+    T: for<'de> Deserialize<'de>,
+{
+    if response.status().is_success() {
+        Ok(response.json().await?)
+    } else {
+        Err(FileHostingError::BackblazeError(response.json().await?))
+    }
+}