How to use _s3_client method in localstack

Best Python code snippet using localstack_python

s3_cache_store.py

Source:s3_cache_store.py

1from __future__ import division, print_function, absolute_import2import fnmatch3from lazy_import import lazy_module4boto3 = lazy_module("boto3")5import podpac6from podpac.core.settings import settings7from podpac.core.cache.utils import CacheException, CacheWildCard8from podpac.core.cache.file_cache_store import FileCacheStore9class S3CacheStore(FileCacheStore):  # pragma: no cover10    cache_mode = "s3"11    cache_modes = set(["s3", "all"])12    _limit_setting = "S3_CACHE_MAX_BYTES"13    _delim = "/"14    def __init__(self, s3_bucket=None, aws_region_name=None, aws_access_key_id=None, aws_secret_access_key=None):15        """Initialize a cache that uses a folder on a local disk file system.16        Parameters17        ----------18        max_size : None, optional19            Maximum allowed size of the cache store in bytes. Defaults to podpac 'S3_CACHE_MAX_BYTES' setting, or no limit if this setting does not exist.20        use_settings_limit : bool, optional21            Use podpac settings to determine cache limits if True, this will also cause subsequent runtime changes to podpac settings module to effect the limit on this cache. Default is True.22        s3_bucket : str, optional23            bucket name, overides settings24        aws_region_name : str, optional25            e.g. 'us-west-1', 'us-west-2','us-east-1'26        aws_access_key_id : str, optional27            overides podpac settings if both `aws_access_key_id` and `aws_secret_access_key` are specified28        aws_secret_access_key : str, optional29            overides podpac settings if both `aws_access_key_id` and `aws_secret_access_key` are specified30        """31        if not settings["S3_CACHE_ENABLED"]:32            raise CacheException("S3 cache is disabled in the podpac settings.")33        self._root_dir_path = settings["S3_CACHE_DIR"]34        if s3_bucket is None:35            s3_bucket = settings["S3_BUCKET_NAME"]36        if aws_access_key_id is None or aws_secret_access_key is None:37            aws_access_key_id = settings["AWS_ACCESS_KEY_ID"]38            aws_secret_access_key = settings["AWS_SECRET_ACCESS_KEY"]39        if aws_region_name is None:40            aws_region_name = settings["AWS_REGION_NAME"]41        aws_session = boto3.session.Session(region_name=aws_region_name)42        self._s3_client = aws_session.client(43            "s3",44            # config= boto3.session.Config(signature_version='s3v4'),45            aws_access_key_id=aws_access_key_id,46            aws_secret_access_key=aws_secret_access_key,47        )48        self._s3_bucket = s3_bucket49        try:50            self._s3_client.head_bucket(Bucket=self._s3_bucket)51        except Exception as e:52            raise e53    # -----------------------------------------------------------------------------------------------------------------54    # main cache API55    # -----------------------------------------------------------------------------------------------------------------56    @property57    def size(self):58        paginator = self._s3_client.get_paginator("list_objects")59        operation_parameters = {"Bucket": self._s3_bucket, "Prefix": self._root_dir_path}60        page_iterator = paginator.paginate(**operation_parameters)61        total_size = 062        for page in page_iterator:63            if "Contents" in page:64                for obj in page["Contents"]:65                    total_size += obj["Size"]66        return total_size67    def cleanup(self):68        """69        Remove expired entries.70        """71        pass  # TODO metadata72    # -----------------------------------------------------------------------------------------------------------------73    # helper methods74    # -----------------------------------------------------------------------------------------------------------------75    def search(self, node, item=CacheWildCard(), coordinates=CacheWildCard()):76        """Fileglob to match files that could be storing cached data for specified node,key,coordinates77        Parameters78        ----------79        node : podpac.core.node.Node80        item : str, CacheWildCard81            CacheWildCard indicates to match any key82        coordinates : podpac.core.coordinates.coordinates.Coordinates, CacheWildCard, None83            CacheWildCard indicates to macth any coordinates84        Returns85        -------86        TYPE : str87            Fileglob of existing paths that match the request88        """89        delim = self._delim90        prefix = self._get_node_dir(node)91        prefix = prefix if prefix.endswith(delim) else prefix + delim92        response = self._s3_client.list_objects_v2(Bucket=self._s3_bucket, Prefix=prefix, Delimiter=delim)93        if response["KeyCount"] > 0:94            obj_names = [o["Key"].replace(prefix, "") for o in response["Contents"]]95        else:96            obj_names = []97        node_dir = self._get_node_dir(node)98        obj_names = fnmatch.filter(obj_names, self._get_filename_pattern(node, item, coordinates))99        paths = [self._path_join(node_dir, filename) for filename in obj_names]100        return paths101    # -----------------------------------------------------------------------------------------------------------------102    # file storage abstraction103    # -----------------------------------------------------------------------------------------------------------------104    def _save(self, path, s, metadata=None):105        # note s needs to be b'bytes' or file below106        # https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3.html#S3.Client.put_object107        self._s3_client.put_object(Bucket=self._s3_bucket, Body=s, Key=path)108        # TODO metadata109    def _load(self, path):110        response = self._s3_client.get_object(Bucket=self._s3_bucket, Key=path)111        return response["Body"].read()112    def _path_join(self, *paths):113        return self._delim.join(paths)114    def _basename(self, path):115        if self._delim in path:116            dirname, basename = path.rsplit(self._delim, 1)117        else:118            basename = path119        return basename120    def _remove(self, path):121        self._s3_client.delete_object(Bucket=self._s3_bucket, Key=path)122    def _exists(self, path):123        response = self._s3_client.list_objects_v2(Bucket=self._s3_bucket, Prefix=path)124        obj_count = response["KeyCount"]125        return obj_count == 1 and response["Contents"][0]["Key"] == path126    def _make_dir(self, path):127        # Does not need to do anything for S3 as the prefix is just part of the object name.128        # note: I believe AWS uses prefixes to decide how to partition objects in a bucket which could affect performance.129        pass130    def _rmtree(self, path):131        paginator = self._s3_client.get_paginator("list_objects_v2")132        pages = paginator.paginate(Bucket=self._s3_bucket, Prefix=path)133        to_delete = dict(Objects=[])134        for item in pages.search("Contents"):135            if item:136                to_delete["Objects"].append(dict(Key=item["Key"]))137            if len(to_delete["Objects"]) >= 1000:138                self._s3_client.delete_objects(Bucket=self._s3_bucket, Delete=to_delete)139                to_delete = dict(Objects=[])140        if len(to_delete["Objects"]):141            self._s3_client.delete_objects(Bucket=self._s3_bucket, Delete=to_delete)142    def _is_empty(self, directory):143        if not directory.endswith(self._delim):144            directory += self._delim145        response = self._s3_client.list_objects_v2(Bucket=self._s3_bucket, Prefix=directory, MaxKeys=2)146        # TODO throw an error if key count is zero as this indicates `directory` is not an existing directory.147        return response["KeyCount"] == 1148    def _rmdir(self, directory):149        # s3 can have "empty" directories150        # should check if directory is empty and the delete151        # delete_objects could be used if recursive=True is specified to this function.152        # NOTE: This can remove the object representing the prefix without deleting other objects with the prefix.153        #       This is because s3 is really a key/value store. This function should maybe be changed to throw an154        #       error if the prefix is not "empty" or should delete all objects with the prefix. The former would155        #       be more consistent with the os function used in the DiskCacheStore.156        # ToDo: 1) examine boto3 response, 2) handle object versioning (as it stands this will apply to the "null version")157        #      https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3.html#S3.Client.delete_object158        if not directory.endswith(self._delim):159            directory += self._delim160        self._s3_client.delete_object(Bucket=self._s3_bucket, Key=directory)161    def _dirname(self, path):162        dirname, basename = path.rsplit(self._delim, 1)163        return dirname164    def _get_metadata(self, path, key):165        return None  # TODO metadata166    def _set_metadata(self, path, key, value):...

cloudstorage.py

Source:cloudstorage.py

1"""2Cloud Storage integration3.. include common links, assuming primary doc root is up one directory4.. include:: ../include/links.rst5"""6import urllib7import fnmatch8import os9try:10    import boto311    import smart_open12    _s3_support_enabled = True13except:14    _s3_support_enabled = False15_supported_cloud_schemes = ['s3']16_s3_client = None17def initialize_cloud_storage(cloud_uri, args):18    scheme = urllib.parse.urlsplit(cloud_uri)[0]19    if scheme == 's3' and _s3_support_enabled:20        session = boto3.Session()21        global _s3_client22        _s3_client = session.client('s3', endpoint_url = args.endpoint_url)23    elif scheme == '':24        raise ValueError("Cannot initialize cloud storage, {cloud_uri} is not a URI")25    else:26        raise RuntimeError("Cannot initialize cloud storage, {scheme} is not a supported cloud URI scheme.")27def is_cloud_uri(potential_uri):28    scheme = urllib.parse.urlsplit(potential_uri)[0]29    if scheme in _supported_cloud_schemes:30        return True31    else:32        return False33def list_objects(cloud_uri, patterns):34    parsed_uri = urllib.parse.urlsplit(cloud_uri)    35    if parsed_uri.scheme == 's3' and _s3_client is not None:36        bucket = parsed_uri.netloc37        key = parsed_uri.path.lstrip('/')38        paginator = _s3_client.get_paginator('list_objects_v2')39        for page in paginator.paginate(Bucket=bucket, Prefix=key):40            for object in page['Contents']:41                matches = False42                for pattern in patterns:43                    if fnmatch.fnmatchcase(object['Key'], pattern):44                        yield (parsed_uri.scheme + '://' + bucket + '/' + object['Key'], object['Size'])45    elif parsed_uri.scheme == '':46        raise ValueError("Cannot initialize cloud storage, {cloud_uri} is not a URI")47    else:48        raise RuntimeError("Cannot initialize cloud storage, {scheme} is not a supported cloud URI scheme.")49def open(cloud_uri,mode="r"):50    if _s3_support_enabled and _s3_client is not None:51        return smart_open.open(cloud_uri, mode, transport_params = {'client': _s3_client})52    else:53        raise RuntimeError(f"Cannot open {cloud_uri} from cloud storage because cloud storage has not been initialized")54def copy(source_uri, dest_uri):55    if _s3_client is None:56        raise RuntimeError(f"Cannot copy {source_uri} to {dest_uri}: S3 cloud storage has not been initialized.")57    parsed_source = urllib.parse.urlsplit(source_uri)    58    parsed_dest = urllib.parse.urlsplit(dest_uri)59    if parsed_source.scheme != 's3' or parsed_dest.scheme != 's3':60        raise ValueError(f"Cannot copy {source_uri} to {dest_uri}: only S3 to S3 copies are supported.")61    source = {'Bucket': parsed_source.netloc, 'Key': parsed_source.path.lstrip('/')}62    _s3_client.copy(source, parsed_dest.netloc, parsed_dest.path.lstrip('/'))63def upload(source_file, dest_uri):64    if _s3_client is None:65        raise RuntimeError(f"Cannot upload {source_file} to {dest_uri}: S3 cloud storage has not been initialized.")66    parsed_dest = urllib.parse.urlsplit(dest_uri)67    if parsed_dest.scheme != 's3':68        raise ValueError(f"Cannot upload to {dest_uri}: only S3 uploads are supported.")69    _s3_client.upload_file(source_file, parsed_dest.netloc, parsed_dest.path.lstrip('/'))70def download(source_uri, dest_dir):71    if _s3_client is None:72        raise RuntimeError(f"Cannot download {source_uri} to {dest_dir}: S3 cloud storage has not been initialized.")73    parsed_source = urllib.parse.urlsplit(source_uri)74    if parsed_source.scheme != 's3':75        raise ValueError(f"Cannot download from {source_uri}: only S3 uploads are supported.")76    dest_file = os.path.join(dest_dir, os.path.basename(parsed_source.path))77    _s3_client.download_file(parsed_source.netloc, parsed_source.path.lstrip('/'), dest_file )...

s3.py

Source:s3.py

1import json2import boto33_s3_client = boto3.client('s3')4def read_json_file(bucket, key):5    """6    Reads a JSON file from s3.7    :params bucket: The name of the bucket where the source file is at.8    :params key: The full file name of the object to read.9    """10    response = _s3_client.get_object(11        Bucket=bucket,12        Key=key13    )14    return json.load(response['Body'])15def write_json_file(bucket, key, data):16    """17    Write a JSON file to an s3 bucket.18    :params bucket: The name of the bucket where the source file is at.19    :params key: The full file name of the object to write.20    :param data: The json object to add to the bucket.21    """22    return _s3_client.put_object(23        Bucket=bucket,24        Key=key,25        Body=json.dumps(data).encode()...

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