Initial shared instances backend (#3800)

* Create base shared instance migration and initial routes

* Fix build

* Add version uploads

* Add permissions field for shared instance users

* Actually use permissions field

* Add "public" flag to shared instances that allow GETing them without authorization

* Add the ability to get and list shared instance versions

* Add the ability to delete shared instance versions

* Fix build after merge

* Secured file hosting (#3784)

* Remove Backblaze-specific file-hosting backend

* Added S3_USES_PATH_STYLE_BUCKETS

* Remove unused file_id parameter from delete_file_version

* Add support for separate public and private buckets in labrinth::file_hosting

* Rename delete_file_version to delete_file

* Add (untested) get_url_for_private_file

* Remove url field from shared instance routes

* Remove url field from shared instance routes

* Use private bucket for shared instance versions

* Make S3 environment variables fully separate between public and private buckets

* Change file host expiry for shared instances to 180 seconds

* Fix lint

* Merge shared instance migrations into a single migration

* Replace shared instance owners with Ghost instead of deleting the instance

apps/labrinth/src/routes/v3/images.rs

@@ -8,13 +8,13 @@ use crate::database::models::{
     project_item, report_item, thread_item, version_item,
 };
 use crate::database::redis::RedisPool;
-use crate::file_hosting::FileHost;
+use crate::file_hosting::{FileHost, FileHostPublicity};
 use crate::models::ids::{ReportId, ThreadMessageId, VersionId};
 use crate::models::images::{Image, ImageContext};
 use crate::queue::session::AuthQueue;
 use crate::routes::ApiError;
 use crate::util::img::upload_image_optimized;
-use crate::util::routes::read_from_payload;
+use crate::util::routes::read_limited_from_payload;
 use actix_web::{HttpRequest, HttpResponse, web};
 use serde::{Deserialize, Serialize};
 use sqlx::PgPool;
@@ -176,7 +176,7 @@ pub async fn images_add(
     }
 
     // Upload the image to the file host
-    let bytes = read_from_payload(
+    let bytes = read_limited_from_payload(
         &mut payload,
         1_048_576,
         "Icons must be smaller than 1MiB",
@@ -186,6 +186,7 @@ pub async fn images_add(
     let content_length = bytes.len();
     let upload_result = upload_image_optimized(
         "data/cached_images",
+        FileHostPublicity::Public, // FIXME: Maybe use private images for threads
         bytes.freeze(),
         &data.ext,
         None,