discourse/app/services/handle_chunk_upload.rb

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# frozen_string_literal: true
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class HandleChunkUpload
def initialize(chunk, params = {})
@chunk = chunk
@params = params
end
def self.check_chunk(chunk, params)
HandleChunkUpload.new(chunk, params).check_chunk
end
def self.upload_chunk(chunk, params)
HandleChunkUpload.new(chunk, params).upload_chunk
end
def self.merge_chunks(chunk, params)
HandleChunkUpload.new(chunk, params).merge_chunks
end
def check_chunk
# check whether the chunk has already been uploaded
has_chunk_been_uploaded = File.exist?(@chunk) && File.size(@chunk) == @params[:current_chunk_size]
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# 200 = exists, 404 = not uploaded yet
status = has_chunk_been_uploaded ? 200 : 404
end
def upload_chunk
# path to chunk file
dir = File.dirname(@chunk)
# ensure directory exists
FileUtils.mkdir_p(dir) unless Dir.exist?(dir)
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# save chunk to the directory
File.open(@chunk, "wb") { |f| f.write(@params[:file].tempfile.read) }
end
def merge_chunks
upload_path = @params[:upload_path]
tmp_upload_path = @params[:tmp_upload_path]
identifier = @params[:identifier]
filename = @params[:filename]
tmp_directory = @params[:tmp_directory]
# delete destination files
begin
File.delete(upload_path)
File.delete(tmp_upload_path)
rescue Errno::ENOENT
end
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# merge all the chunks
File.open(tmp_upload_path, "a") do |file|
(1..@chunk).each do |chunk_number|
# path to chunk
chunk_path = BackupRestore::LocalBackupStore.chunk_path(identifier, filename, chunk_number)
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# add chunk to file
file << File.open(chunk_path).read
end
end
# rename tmp file to final file name
FileUtils.mv(tmp_upload_path, upload_path, force: true)
# remove tmp directory
begin
FileUtils.rm_rf(tmp_directory)
rescue Errno::ENOENT
end
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end
end