next_chunk in errors (FileExists, ChunkAlreadyUploaded), FileFullyUploaded.

src/common/requests/errors.cr

@@ -43,8 +43,9 @@ class FileStorage::Errors
 		property mid        : String
 		property reason     = "file already present"
 		property filedigest : String
+		property next_chunk : Int32
 
-		def initialize(@mid, @filedigest)
+		def initialize(@mid, @filedigest, @next_chunk)
 		end
 	end
 	FileStorage.errors << FileExists
@@ -59,4 +60,15 @@ class FileStorage::Errors
 		end
 	end
 	FileStorage.errors << FileDoesNotExist
+
+	# When a file was already fully uploaded.
+	JSONIPC.request FileFullyUploaded, 206 do
+		property mid        : String
+		property reason     = "file already uploaded fully"
+		property filedigest : String
+
+		def initialize(@mid, @filedigest)
+		end
+	end
+	FileStorage.errors << FileFullyUploaded
 end

src/server/storage.cr

@@ -105,9 +105,14 @@ class FileStorage::Storage
 		if transfer_info.chunks.select do |v| v == chunk_number end.size == 1
 			write_a_chunk file_digest, chunk_size, chunk_number, data
 		else
+			begin
 				# Send the next remaining chunk to upload.
 				next_chunk = transfer_info.chunks.sort.first
 				return FileStorage::Errors::ChunkAlreadyUploaded.new mid, file_digest, next_chunk
+			rescue e : IndexError
+				# In case the file was completely uploaded already.
+				return FileStorage::Errors::FileFullyUploaded.new mid, file_digest
+			end
 		end
 
 		remove_chunk_from_db transfer_info, chunk_number
@@ -185,7 +190,13 @@ class FileStorage::Storage
 		else
 			# File information already exists, request may be duplicated,
 			# in this case: ignore the upload request.
-			return FileStorage::Errors::FileExists.new mid, file_digest
+			begin
+				next_chunk = transfer_info.chunks.sort.first
+				return FileStorage::Errors::FileExists.new mid, file_digest, next_chunk
+			rescue e : IndexError
+				# In case the file was completely uploaded already.
+				return FileStorage::Errors::FileFullyUploaded.new mid, file_digest
+			end
 		end
 
 		# TODO: store upload request in UserData?