s3: Add basic ACL to uploading files

Sources/S3Storage/ACL+Header.swift

@@ -0,0 +1,37 @@
+//
+//  ACL+Header.swift
+//  S3Storage
+//
+//  Created by Anthony Castelli on 5/2/18.
+//
+
+import Foundation
+import HTTP
+
+protocol Header {
+    var header: [String : String]? { get }
+}
+
+extension PredefinedACL: Header {
+    var header: [String : String]? {
+        switch self {
+        case .default: return nil
+
+        // For Object and Bucket
+        case .private: return ["x-amz-acl": "private"]
+        case .publicRead: return ["x-amz-acl": "public-read"]
+        case .publicReadWrite: return ["x-amz-acl": "public-read-write"]
+        case .awsExecRead: return ["x-amz-acl": "aws-exec-read"]
+        case .authenticatedRead: return ["x-amz-acl": "authenticated-read"]
+
+        // For Object
+        case .bucketOwnerRead: return ["x-amz-acl": "bucket-owner-read"]
+        case .bucketOwnerFullControl: return ["x-amz-acl": "bucket-owner-full-control"]
+
+        // Bucket
+        case .logDeliveryWrite: return nil
+        }
+    }
+}
+
+

Sources/S3Storage/S3Adapter.swift

@@ -79,7 +79,18 @@ extension S3Adapter {
         guard let url = URL(string: self.region.host + bucket.finished(with: "/") + object) else {
             throw S3AdapterError(identifier: "write", reason: "Couldnt not generate a valid URL path.", source: .capture())
         }
-        let headers = try self.generateAuthHeader(.PUT, urlString: url.absoluteString, payload: .bytes(content))
+
+        // Create any ACL headers we need
+        var aclHeaders = [String : String]()
+        if let metadata = metadata {
+            if let predefinedACL = metadata.predefinedACL?.header {
+                if let key = predefinedACL.keys.first, let value = predefinedACL.values.first {
+                    aclHeaders[key] = value
+                }
+            }
+        }
+
+        let headers = try self.generateAuthHeader(.PUT, urlString: url.absoluteString, headers: aclHeaders, payload: .bytes(content))
 
         let request = Request(using: container)
         request.http.method = .PUT