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| import io
import json
import mimetypes
import os
from contextlib import nullcontext
from pathlib import Path
import boto3
from boto3.s3.transfer import TransferConfig
from botocore.exceptions import ClientError
from src.common.components.file_system.fs_abstract_client import AbstractFileSystemClient, FileDescriptor, FileJSON, \
FileInterfaced, FileIOClass, FullFileName, FileBytes
class FileSystemClientByAmazonS3(AbstractFileSystemClient):
def __init__(self, amazon_s3_client: "AmazonS3Client"):
self.__amazon_s3_client = amazon_s3_client
def create_path(self, file_descriptor: FileDescriptor):
self.__amazon_s3_client.create_bucket(
bucket=file_descriptor.root)
def find_one(self, file_descriptor: FileDescriptor) -> FileDescriptor:
prefix = FileDescriptor(file_descriptor.root, file_descriptor.directory,
file_descriptor.filename.replace('.*', '.'))
keys = self.__amazon_s3_client.list_objects_by_prefix_and_suffix(
bucket=file_descriptor.root,
prefix=self.__key_join(prefix))
if keys.__len__() == 1:
key = keys[0]
return FileDescriptor(
file_descriptor.root,
file_descriptor.directory,
key[file_descriptor.directory.__len__() + 1:]
)
return None
def file_exists(self, file_descriptor: FileDescriptor) -> bool:
file_exists = self.__amazon_s3_client.object_exists(
bucket=file_descriptor.root,
key=self.__key_join(file_descriptor))
return file_exists
def read_json(self, file_descriptor: FileDescriptor, allow_not_exists: bool = False) -> FileJSON:
key = self.__key_join(file_descriptor)
file_exists, content = self.__amazon_s3_client.get_object_if_exists(
bucket=file_descriptor.root,
key=key)
if not file_exists and not allow_not_exists:
raise FileNotFoundError(key)
return FileJSON(file_descriptor, content, file_exists)
def put_json(self, file_json: FileJSON) -> FullFileName:
content = json.dumps(file_json.content_json)
key = self.__key_join(file_json.file_descriptor)
self.__amazon_s3_client.write_object(
bucket=file_json.file_descriptor.root,
key=key,
obj=content)
return key
def read_bytes(self, file_descriptor: FileDescriptor, allow_not_exists: bool = False) -> FileBytes:
key = self.__key_join(file_descriptor)
try:
return FileBytes(
file_descriptor,
self.__amazon_s3_client.download_stream(
bucket=file_descriptor.root,
key=key),
True)
except ClientError as e:
if allow_not_exists:
return FileBytes(file_descriptor, b"", False)
else:
raise FileNotFoundError(key)
def put_bytes(self, file_bytes: FileBytes) -> FullFileName:
key = self.__key_join(file_bytes.file_descriptor)
self.__amazon_s3_client.upload_stream(
bucket=file_bytes.file_descriptor.root,
key=key,
stream=file_bytes.content)
return key
def put_interfaced_file(self, file_interfaced: FileInterfaced) -> FullFileName:
key = self.__key_join(file_interfaced.file_descriptor)
self.__amazon_s3_client.upload_stream(
bucket=file_interfaced.file_descriptor.root,
key=key,
stream=file_interfaced.as_readable().to_bytes())
return key
def remove(self, file_descriptor: FileDescriptor):
self.__amazon_s3_client.delete_object(
bucket=file_descriptor.root,
key=self.__key_join(file_descriptor))
def file_lock(self, file_descriptor: FileDescriptor):
return nullcontext()
@staticmethod
def __key_join(file_descriptor: FileDescriptor):
if file_descriptor.directory != "":
return f'{file_descriptor.directory}/{file_descriptor.filename}'
else:
return file_descriptor.filename
def is_same_file(self, file_descriptor_one: FileDescriptor, file_descriptor_two: FileDescriptor):
if file_descriptor_one.root != '' and file_descriptor_two.root != '':
if file_descriptor_one.root != file_descriptor_two.root:
return False
fn1 = self.__key_join(file_descriptor_one)
fn2 = self.__key_join(file_descriptor_two)
return fn1 == fn2
class AmazonS3Client:
# add any mime type that is not automatically detected
mimetypes.add_type('application/json', '.json')
def __init__(self, s3_client=None,
aws_region: str = "", aws_endpoint: str = "",
aws_access_key_id: str = "", aws_access_key_secret: str = ""):
self.config = TransferConfig(multipart_threshold=1024 * 5,
max_concurrency=10,
multipart_chunksize=1024 * 2,
use_threads=True)
# clients are generally thread-safe
# https://boto3.amazonaws.com/v1/documentation/api/latest/guide/clients.html#multithreading-or-multiprocessing-with-clients
# Le debuggeur PyCharm ne supporte pas que l'on instancie un boto3.client dans un thread
# il se bloque, il faut le stopper et il continue son execution, c'est douteux
# Utilisez AmazonS3Client comme un objet global partagé
if s3_client is not None:
self.s3_client = s3_client
else:
self.s3_client = boto3.client("s3", region_name=aws_region,
endpoint_url=aws_endpoint,
aws_access_key_id=aws_access_key_id,
aws_secret_access_key=aws_access_key_secret
)
def create_bucket(self, **kwargs):
"""
Create a bucket. If the bucket does not exist, it creates it.
Bucket name takes the bucket named parameter. If it exists, it is not created
@param kwargs:
bucket = is the bucket identifier
"""
bucket = kwargs.get('bucket')
try:
if not self.bucket_exists(bucket=bucket):
self.s3_client.create_bucket(Bucket=bucket)
except ClientError as ex:
raise
def write_metadata_to_bucket(self, **kwargs):
# todo to check if we really need this for s3
"""
Create a bucket. If the bucket does not exist, it creates it.
Bucket name takes the bucket named parameter. If it exists, it is not created
@param kwargs:
bucket = is the bucket identifier
"""
bucket = kwargs.get('bucket')
metadata = kwargs.get('metadata')
try:
if not self.bucket_exists(bucket=bucket):
self.s3_client.create_bucket(Bucket=bucket)
except ClientError as ex:
raise
def write_object(self, **kwargs):
"""
Uploads objects to bucket.
@param kwargs:
bucket = is the bucket identifier
key = key index
object
"""
bucket = kwargs.get('bucket')
key = kwargs.get('key')
data = kwargs.get('obj')
file_mime_type, _ = mimetypes.guess_type(key)
if file_mime_type is None:
file_mime_type = 'application/json'
try:
self.s3_client.put_object(Body=data,
Bucket=bucket,
Key=key,
ContentType=file_mime_type)
except ClientError as ex:
raise
def delete_object(self, **kwargs):
bucket = kwargs.get('bucket')
key = kwargs.get('key')
try:
self.s3_client.delete_object(Bucket=bucket, Key=key)
except ClientError as ex:
raise
def create_objects(self, **kwargs):
"""
Uploads objects to bucket. If the bucket does not exist, it creates it.
Bucket name takes the bucket name. If it exists, it is not created
@param kwargs:
bucket = is the bucket identifier
path = path to files (folder) ex: /data
"""
bucket = kwargs.get('bucket')
key = kwargs.get('key')
path = kwargs.get('path')
try:
for subdir, dirs, files in os.walk(path):
for file in files:
full_path = os.path.join(subdir, file)
self.s3_client.upload_file(Filename=full_path, Bucket=bucket,
Key=f'{key}/{file}',
Config=self.config)
except ClientError as ex:
raise
def upload_stream(self, bucket: str, key: str, stream):
"""
Uploads objects to bucket. If the object does not exist, it creates it.
@param stream the object to be uploaded
@param bucket = is the bucket identifier (root bucket)
@param key = is the key identifier aws s3
"""
try:
content = io.BytesIO(stream)
self.s3_client.upload_fileobj(Fileobj=content, Bucket=bucket,
Key=key,
Config=self.config)
except ClientError as ex:
raise
def delete_objects(self, **kwargs):
tenant_id = kwargs.get('tenant_id')
mail_id = kwargs.get('mail_id')
if tenant_id and mail_id:
file_list = self.list_objects(tenant_id=tenant_id, mail_id=mail_id, prefix="")
try:
for file in file_list:
self.s3_client.delete_object(Bucket=tenant_id, Key=file)
except ClientError as ex:
raise
def download_objects(self, **kwargs):
"""
This method downloads all the files contained in a mail_id folder
@param kwargs:
tenant_id = is the tenant_id identifier
mail_id = is the folder containing all attachments for that email
local_path = is the local path where the files will be stored
"""
tenant_id = kwargs.get('tenant_id')
mail_id = kwargs.get('mail_id')
prefix = kwargs.get('prefix')
local_path = kwargs.get('local_path')
try:
found_object_list = self.list_objects(tenant_id=tenant_id, mail_id=mail_id, prefix=prefix)
if len(found_object_list):
for file in found_object_list:
file_path = Path(local_path, file)
file_path.parent.mkdir(parents=True, exist_ok=True)
self.s3_client.download_file(tenant_id, file,
str(file_path), Config=self.config)
except ClientError as ex:
raise
def list_objects(self, **kwargs) -> list:
"""
Uploads objects to bucket. If the bucket does not exist, it creates it.
Bucket name takes the tenant_id name. If it exists, it is not created.
S3 list_objects_v2 can list at max 1000 files in one go.
Paginator is useful when you have more than 1000s of files in S3.
@param kwargs:
tenant_id = is the tenant_id identifier
prefix = prefix to search for ex: 2023/02/12
@return:
List of files, with prefix
"""
obj_list = []
bucket_name = kwargs.get('bucket')
prefix = kwargs.get('prefix')
key = kwargs.get('key')
try:
if bucket_name:
paginator = self.s3_client.get_paginator("list_objects_v2")
response = paginator.paginate(Bucket=bucket_name, PaginationConfig={"PageSize": 1000}, Prefix=prefix)
for page in response:
files = page.get("Contents")
if files:
for file_obj in files:
if key and key in file_obj['Key']:
obj_list.append(file_obj['Key'])
else:
obj_list.append(file_obj['Key'])
return obj_list
return obj_list
except ClientError as ex:
return []
def object_exists(self, **kwargs):
bucket = kwargs.get('bucket')
key = kwargs.get('key')
try:
self.s3_client.get_object(Bucket=bucket, Key=key)
return True
except ClientError as e:
if e.response['Error']['Code'] == 'NoSuchKey':
return False
else:
raise
def get_object_if_exists(self, **kwargs):
bucket = kwargs.get('bucket')
key = kwargs.get('key')
file_mime_type, _ = mimetypes.guess_type(key)
if file_mime_type is None:
file_mime_type = 'application/json'
try:
obj = self.s3_client.get_object(Bucket=bucket, Key=key)
if file_mime_type == 'application/json':
obj = json.loads(obj.get('Body').read().decode('utf-8'))
return True, obj
return True, obj
except ClientError as e:
if e.response['Error']['Code'] == 'NoSuchKey':
# normal behaviour, we return false since the object was not found
return False, None
else:
raise
def download_stream(self, bucket: str, key: str) -> bytes:
"""
Download objects to bucket
:return: stream the object to be downloaded
:param bucket: is the bucket identifier (root bucket)
:param key: is the key identifier aws s3
"""
try:
content = io.BytesIO()
self.s3_client.download_fileobj(Fileobj=content, Bucket=bucket, Key=key, Config=self.config)
content.seek(0)
stream: bytes = content.read()
return stream
except ClientError as ex:
raise
def read_object(self, **kwargs):
"""
Reads objects from bucket.
@param kwargs:
bucket = is the bucket identifier
key = key index
object
"""
bucket = kwargs.get('bucket')
key = kwargs.get('key')
try:
obj = self.s3_client.get_object(Bucket=bucket, Key=key).get('Body').read().decode('utf-8')
return json.loads(obj)
except ClientError as ex:
raise
def bucket_exists(self, **kwargs) -> bool:
bucket = kwargs.get('bucket')
if bucket:
for obj in self.s3_client.list_buckets().get('Buckets'):
if obj['Name'] == bucket:
return True
return False
def list_objects_by_prefix_and_suffix(self, **kwargs):
"""
Generate the keys in an S3 bucket.
:param bucket: Name of the S3 bucket.
:param prefix: Only fetch keys that start with this prefix (optional).
:param suffix: Only fetch keys that end with this suffix (optional).
"""
bucket = kwargs.get('bucket')
prefix = kwargs.get('prefix', '')
suffix = kwargs.get('suffix', '')
keys = []
paginator = self.s3_client.get_paginator("list_objects_v2")
response = paginator.paginate(Bucket=bucket, PaginationConfig={"PageSize": 1000}, Prefix=prefix)
for page in response:
objects = page.get("Contents")
if objects:
for obj in objects:
key = obj['Key']
if key.startswith(prefix) and key.endswith(suffix):
keys.append(key)
return keys |
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