def copy():
print("started copying file in namenode")
filename = request.json['filename']
dirname = request.json['dirname']
# node with the file
original_node = fs.get_file(filename)
if original_node:
print(f"file {filename} found")
# node with the new dir
new_node_par = fs.get_dir(dirname)
if new_node_par:
# resolving name collision
new_name = os.path.basename(filename) + '_copy'
count = 1
file = fs.get_file(new_name)
while file:
new_name = new_name + str(count)
count += 1
file = fs.get_file(new_name)
# creating copy of the file
file = fs.create_file(new_name, new_node_par,
original_node.file['size'])
print(f"file was copied under the filename {filename}")
return jsonify({'original': original_node.file, 'copy': file})
else:
print("specified directory does not exist")
return Response("specified directory does not exist", 404)
else:
return Response("file doesn't exist", 404)
def create():
print("started CREATING file")
# obtain filename
filename = request.json['filename']
filesize = 0
if request.json['filesize']:
filesize = request.json['filesize']
# check whether file already exists
if fs.get_file(filename) or fs.get_dir(filename):
print(f"FILE {filename} already exists")
# app.logger.info(f"file already exists {filename}")
return Response("FAILED: file or dir with this name already exists",
409)
# create file, return info about datanodes and id
else:
# app.logger.info(f"filesize: {filesize} free_space:{fs.free_space}")
if filesize > fs.free_space: # check if there's available space
print("FAILED: not enough space")
return Response("not enough space", 413)
file_dir = os.path.dirname(filename)
file_name = os.path.basename(filename)
file_parent = fs.get_dir(file_dir)
if file_parent:
file = fs.create_file(file_name, file_parent, filesize)
return jsonify({"file": file})
else:
# TODO write Response
return Response(f"FAILED: dir {file_dir} doesn't exist", 404)
def move():
# get file name
filename = request.json['filename']
# get path
path = request.json['path']
# obtain file from the filesystem
file_node = fs.get_file(filename)
if file_node:
# resolve filename
dir_name = ''
file_name = ''
if path[-1] == '/':
dir_name = path
file_name = os.path.basename(filename)
else:
dir_name = os.path.dirname(path)
file_name = os.path.basename(path)
# obtain the directory where to move
node = fs.get_dir(dir_name)
if node:
if file_name in [x.name for x in node.children]:
return Response(
f'FAILED: file {filename} already exists in this dir', 419)
else:
# move the file in a filesystem
file_node.parent = node
file_node.name = file_name
return Response('', 200)
else:
return Response(
f'FAILED: specified path {dir_name} does not exist', 404)
else:
return Response(f'FAILED: file {filename} could not be found', 404)
def info():
# get file name
filename = request.json['filename']
node = fs.get_file(filename)
if node:
return jsonify({'info': node.file})
else:
return Response('no such file found', 404)
def info():
# get file name
filename = request.json['filename']
# obtain the file from the filesystem
node = fs.get_file(filename)
if node:
return jsonify({'info': node.file})
else:
return Response(f'FAILED: file {filename} not found', 404)
def get():
print("started GETTING the file in NAMENODE")
filename = request.json['filename']
print(f"filename = {filename}")
file = fs.get_file(filename)
if file:
print("file exists")
print(f"file = {file.file}")
return jsonify({"file": file.file})
else:
print("file doesn't exist")
return Response("file doesn't exist", 404)
def delete():
# delete file from FS
print("starting deleting file")
filename = request.json['filename']
print(f"filename = {filename}")
node = fs.get_file(filename)
if node:
print("file exists")
file = fs.delete_file(node)
print(f"file = {file}")
return jsonify({"file": file})
else:
print("file doesn't exist")
return Response("file doesn't exist", 404)
def mkdir():
# get directory name
dirname = request.json['dirname']
if fs.get_file(dirname) or fs.get_dir(dirname):
return Response("dir or file with such name exists", 409)
else:
# add directory to fs tree
dir_parent = os.path.dirname(dirname)
dir_name = os.path.basename(dirname)
parent_node = fs.get_dir(dir_parent)
# TODO write Response
if parent_node:
fs.create_directory(dir_name, parent_node)
return Response("ok", 200)
else:
return Response("path doesn't exist", 404)
def mkdir():
# get directory name
dirname = request.json['dirname']
if fs.get_file(dirname) or fs.get_dir(dirname):
return Response("FAILED: dir or file with such name exists", 409)
else:
# add directory to fs tree
dir_parent = os.path.dirname(dirname)
dir_name = os.path.basename(dirname)
parent_node = fs.get_dir(dir_parent)
if parent_node:
fs.create_directory(dir_name, parent_node)
return Response("ok", 200)
else:
return Response(
f"FAILED: specified path {dir_parent} does not exist", 404)
def move():
# get file name
filename = request.json['filename']
# get path
path = request.json['path']
# TODO write Response
file_node = fs.get_file(filename)
if file_node:
node = fs.get_dir(path)
if node:
if filename in [x.name for x in node.children]:
return Response(
'file with such name already exists in this dir', 419)
else:
file_node.parent = node
print(RenderTree(fs.root))
return Response('', 200)
else:
return Response('no such dir exists', 404)
else:
return Response('no such file exists', 404)