generate public url without signature (#100)

* generate public url without signature

* imports

* update rules

.pylintrc

@@ -5,7 +5,7 @@ persistent=no
 unsafe-load-any-extension=no
 
 [MESSAGES CONTROL]
-disable=import-star-module-level,old-octal-literal,oct-method,print-statement,unpacking-in-except,parameter-unpacking,backtick,old-raise-syntax,old-ne-operator,long-suffix,dict-view-method,dict-iter-method,metaclass-assignment,next-method-called,raising-string,indexing-exception,raw_input-builtin,long-builtin,file-builtin,execfile-builtin,coerce-builtin,cmp-builtin,buffer-builtin,basestring-builtin,apply-builtin,filter-builtin-not-iterating,using-cmp-argument,useless-suppression,range-builtin-not-iterating,suppressed-message,missing-docstring,no-absolute-import,old-division,cmp-method,reload-builtin,zip-builtin-not-iterating,intern-builtin,unichr-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,input-builtin,round-builtin,hex-method,nonzero-method,map-builtin-not-iterating,relative-import,invalid-name,bad-continuation,no-member,locally-disabled,fixme,import-error,too-many-locals,no-name-in-module,too-many-instance-attributes,no-self-use,logging-fstring-interpolation,W0703,W0702,R0904
+disable=W0212,C0116,missing-function-docstring,import-star-module-level,old-octal-literal,oct-method,print-statement,unpacking-in-except,parameter-unpacking,backtick,old-raise-syntax,old-ne-operator,long-suffix,dict-view-method,dict-iter-method,metaclass-assignment,next-method-called,raising-string,indexing-exception,raw_input-builtin,long-builtin,file-builtin,execfile-builtin,coerce-builtin,cmp-builtin,buffer-builtin,basestring-builtin,apply-builtin,filter-builtin-not-iterating,using-cmp-argument,useless-suppression,range-builtin-not-iterating,suppressed-message,missing-docstring,no-absolute-import,old-division,cmp-method,reload-builtin,zip-builtin-not-iterating,intern-builtin,unichr-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,input-builtin,round-builtin,hex-method,nonzero-method,map-builtin-not-iterating,relative-import,invalid-name,bad-continuation,no-member,locally-disabled,fixme,import-error,too-many-locals,no-name-in-module,too-many-instance-attributes,no-self-use,logging-fstring-interpolation,W0703,W0702,R0904
 enable=W0603,global-statement
 
 [REPORTS]

syngenta_digital_dta/s3/adapter.py

@@ -1,9 +1,11 @@
-from io import BytesIO
 import os
+from io import BytesIO
 
 import boto3
+import botocore
 import jsonpickle
 from botocore.exceptions import ClientError
+
 from syngenta_digital_dta.common.base_adapter import BaseAdapter
 
 
@@ -18,14 +20,20 @@ def __init__(self, **kwargs):
         self.aws_access_key_id = kwargs.get('aws_access_key_id')
         self.aws_secret_access_key = kwargs.get('aws_secret_access_key')
         self.region = kwargs.get('region')
-        self.client = boto3.client(
+        self.client = self.__make_client()
+        self.resource = self.__make_resource()
+
+    def __make_client(self):
+        return boto3.client(
             's3',
             endpoint_url=self.endpoint,
             aws_access_key_id=self.aws_access_key_id,
             aws_secret_access_key=self.aws_secret_access_key,
             region_name=self.region
         )
-        self.resource = boto3.resource(
+
+    def __make_resource(self):
+        return boto3.resource(
             's3',
             endpoint_url=self.endpoint,
             aws_access_key_id=self.aws_access_key_id,
@@ -102,6 +110,14 @@ def multipart_upload(self, **kwargs):
             super().publish('create', self.__generate_publish_data(**kwargs))
         return complete_response
 
+    def create_public_url(self, **kwargs):
+        # we create a new client here to not modify other method calls
+        client = self.__make_client()
+        client._client_config.signature_version = botocore.UNSIGNED
+        return client.generate_presigned_url(
+            'get_object', ExpiresIn=0, Params={'Bucket': self.bucket, 'Key': kwargs['s3_path']}
+        )
+
     def create_presigned_read_url(self, **kwargs):
         results = self.client.generate_presigned_url(
             'get_object',