FEATURE: upload backups

app/controllers/admin/backups_controller.rb

@@ -2,7 +2,7 @@ require_dependency "backup_restore"
 
 class Admin::BackupsController < Admin::AdminController
 
-  skip_before_filter :check_xhr, only: [:index, :show, :logs]
+  skip_before_filter :check_xhr, only: [:index, :show, :logs, :check_chunk, :upload_chunk]
 
   def index
     respond_to do |format|
@@ -83,4 +83,51 @@ class Admin::BackupsController < Admin::AdminController
     render nothing: true
   end
 
+  def check_chunk
+    identifier         = params.fetch(:resumableIdentifier)
+    filename           = params.fetch(:resumableFilename)
+    chunk_number       = params.fetch(:resumableChunkNumber)
+    current_chunk_size = params.fetch(:resumableCurrentChunkSize).to_i
+
+    # path to chunk file
+    chunk = Backup.chunk_path(identifier, filename, chunk_number)
+    # check whether the chunk has already been uploaded
+    has_chunk_been_uploaded = File.exists?(chunk) && File.size(chunk) == current_chunk_size
+    # 200 = exists, 404 = not uploaded yet
+    status = has_chunk_been_uploaded ? 200 : 404
+
+    render nothing: true, status: status
+  end
+
+  def upload_chunk
+    filename = params.fetch(:resumableFilename)
+    return render nothing:true, status: 415 unless filename.to_s.end_with?(".tar.gz")
+
+    file               = params.fetch(:file)
+    identifier         = params.fetch(:resumableIdentifier)
+    chunk_number       = params.fetch(:resumableChunkNumber).to_i
+    chunk_size         = params.fetch(:resumableChunkSize).to_i
+    total_size         = params.fetch(:resumableTotalSize).to_i
+    current_chunk_size = params.fetch(:resumableCurrentChunkSize).to_i
+
+    # path to chunk file
+    chunk = Backup.chunk_path(identifier, filename, chunk_number)
+    dir = File.dirname(chunk)
+
+    # ensure directory exists
+    FileUtils.mkdir_p(dir) unless Dir.exists?(dir)
+    # save chunk to the directory
+    File.open(chunk, "wb") { |f| f.write(file.tempfile.read) }
+
+    uploaded_file_size = chunk_number * chunk_size
+
+    # when all chunks are uploaded
+    if uploaded_file_size + current_chunk_size >= total_size
+      # merge all the chunks in a background thread
+      Jobs.enqueue(:backup_chunks_merger, filename: filename, identifier: identifier, chunks: chunk_number)
+    end
+
+    render nothing: true
+  end
+
 end