from __future__ import unicode_literals import json import six from moto.core.responses import BaseResponse from moto.core.utils import camelcase_to_underscores from .models import dynamodb_backend, dynamo_json_dump GET_SESSION_TOKEN_RESULT = """ AQoEXAMPLEH4aoAH0gNCAPyJxz4BlCFFxWNE1OPTgk5TthT+FvwqnKwRcOIfrRh3c/L To6UDdyJwOOvEVPvLXCrrrUtdnniCEXAMPLE/IvU1dYUg2RVAJBanLiHb4IgRmpRV3z rkuWJOgQs8IZZaIv2BXIa2R4OlgkBN9bkUDNCJiBeb/AXlzBBko7b15fjrBs2+cTQtp Z3CYWFXG8C5zqx37wnOE49mRl/+OtkIKGO7fAE wJalrXUtnFEMI/K7MDENG/bPxRfiCYzEXAMPLEKEY 2011-07-11T19:55:29.611Z AKIAIOSFODNN7EXAMPLE 58c5dbae-abef-11e0-8cfe-09039844ac7d """ def sts_handler(): return GET_SESSION_TOKEN_RESULT class DynamoHandler(BaseResponse): def get_endpoint_name(self, headers): """Parses request headers and extracts part od the X-Amz-Target that corresponds to a method of DynamoHandler ie: X-Amz-Target: DynamoDB_20111205.ListTables -> ListTables """ # Headers are case-insensitive. Probably a better way to do this. match = headers.get('x-amz-target') or headers.get('X-Amz-Target') if match: return match.split(".")[1] def error(self, type_, status=400): return status, self.response_headers, dynamo_json_dump({'__type': type_}) def call_action(self): body = self.body.decode('utf-8') if 'GetSessionToken' in body: return 200, self.response_headers, sts_handler() self.body = json.loads(body or '{}') endpoint = self.get_endpoint_name(self.headers) if endpoint: endpoint = camelcase_to_underscores(endpoint) response = getattr(self, endpoint)() if isinstance(response, six.string_types): return 200, self.response_headers, response else: status_code, new_headers, response_content = response self.response_headers.update(new_headers) return status_code, self.response_headers, response_content else: return 404, self.response_headers, "" def list_tables(self): body = self.body limit = body.get('Limit') if body.get("ExclusiveStartTableName"): last = body.get("ExclusiveStartTableName") start = list(dynamodb_backend.tables.keys()).index(last) + 1 else: start = 0 all_tables = list(dynamodb_backend.tables.keys()) if limit: tables = all_tables[start:start + limit] else: tables = all_tables[start:] response = {"TableNames": tables} if limit and len(all_tables) > start + limit: response["LastEvaluatedTableName"] = tables[-1] return dynamo_json_dump(response) def create_table(self): body = self.body name = body['TableName'] key_schema = body['KeySchema'] hash_hey = key_schema['HashKeyElement'] hash_key_attr = hash_hey['AttributeName'] hash_key_type = hash_hey['AttributeType'] range_hey = key_schema.get('RangeKeyElement', {}) range_key_attr = range_hey.get('AttributeName') range_key_type = range_hey.get('AttributeType') throughput = body["ProvisionedThroughput"] read_units = throughput["ReadCapacityUnits"] write_units = throughput["WriteCapacityUnits"] table = dynamodb_backend.create_table( name, hash_key_attr=hash_key_attr, hash_key_type=hash_key_type, range_key_attr=range_key_attr, range_key_type=range_key_type, read_capacity=int(read_units), write_capacity=int(write_units), ) return dynamo_json_dump(table.describe) def delete_table(self): name = self.body['TableName'] table = dynamodb_backend.delete_table(name) if table: return dynamo_json_dump(table.describe) else: er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException' return self.error(er) def update_table(self): name = self.body['TableName'] throughput = self.body["ProvisionedThroughput"] new_read_units = throughput["ReadCapacityUnits"] new_write_units = throughput["WriteCapacityUnits"] table = dynamodb_backend.update_table_throughput(name, new_read_units, new_write_units) return dynamo_json_dump(table.describe) def describe_table(self): name = self.body['TableName'] try: table = dynamodb_backend.tables[name] except KeyError: er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException' return self.error(er) return dynamo_json_dump(table.describe) def put_item(self): name = self.body['TableName'] item = self.body['Item'] result = dynamodb_backend.put_item(name, item) if result: item_dict = result.to_json() item_dict['ConsumedCapacityUnits'] = 1 return dynamo_json_dump(item_dict) else: er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException' return self.error(er) def batch_write_item(self): table_batches = self.body['RequestItems'] for table_name, table_requests in table_batches.items(): for table_request in table_requests: request_type = list(table_request)[0] request = list(table_request.values())[0] if request_type == 'PutRequest': item = request['Item'] dynamodb_backend.put_item(table_name, item) elif request_type == 'DeleteRequest': key = request['Key'] hash_key = key['HashKeyElement'] range_key = key.get('RangeKeyElement') item = dynamodb_backend.delete_item(table_name, hash_key, range_key) response = { "Responses": { "Thread": { "ConsumedCapacityUnits": 1.0 }, "Reply": { "ConsumedCapacityUnits": 1.0 } }, "UnprocessedItems": {} } return dynamo_json_dump(response) def get_item(self): name = self.body['TableName'] key = self.body['Key'] hash_key = key['HashKeyElement'] range_key = key.get('RangeKeyElement') attrs_to_get = self.body.get('AttributesToGet') try: item = dynamodb_backend.get_item(name, hash_key, range_key) except ValueError: er = 'com.amazon.coral.validate#ValidationException' return self.error(er, status=400) if item: item_dict = item.describe_attrs(attrs_to_get) item_dict['ConsumedCapacityUnits'] = 0.5 return dynamo_json_dump(item_dict) else: # Item not found er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException' return self.error(er, status=404) def batch_get_item(self): table_batches = self.body['RequestItems'] results = { "Responses": { "UnprocessedKeys": {} } } for table_name, table_request in table_batches.items(): items = [] keys = table_request['Keys'] attributes_to_get = table_request.get('AttributesToGet') for key in keys: hash_key = key["HashKeyElement"] range_key = key.get("RangeKeyElement") item = dynamodb_backend.get_item(table_name, hash_key, range_key) if item: item_describe = item.describe_attrs(attributes_to_get) items.append(item_describe) results["Responses"][table_name] = {"Items": items, "ConsumedCapacityUnits": 1} return dynamo_json_dump(results) def query(self): name = self.body['TableName'] hash_key = self.body['HashKeyValue'] range_condition = self.body.get('RangeKeyCondition') if range_condition: range_comparison = range_condition['ComparisonOperator'] range_values = range_condition['AttributeValueList'] else: range_comparison = None range_values = [] items, last_page = dynamodb_backend.query(name, hash_key, range_comparison, range_values) if items is None: er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException' return self.error(er) result = { "Count": len(items), "Items": [item.attrs for item in items], "ConsumedCapacityUnits": 1, } # Implement this when we do pagination # if not last_page: # result["LastEvaluatedKey"] = { # "HashKeyElement": items[-1].hash_key, # "RangeKeyElement": items[-1].range_key, # } return dynamo_json_dump(result) def scan(self): name = self.body['TableName'] filters = {} scan_filters = self.body.get('ScanFilter', {}) for attribute_name, scan_filter in scan_filters.items(): # Keys are attribute names. Values are tuples of (comparison, comparison_value) comparison_operator = scan_filter["ComparisonOperator"] comparison_values = scan_filter.get("AttributeValueList", []) filters[attribute_name] = (comparison_operator, comparison_values) items, scanned_count, last_page = dynamodb_backend.scan(name, filters) if items is None: er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException' return self.error(er) result = { "Count": len(items), "Items": [item.attrs for item in items], "ConsumedCapacityUnits": 1, "ScannedCount": scanned_count } # Implement this when we do pagination # if not last_page: # result["LastEvaluatedKey"] = { # "HashKeyElement": items[-1].hash_key, # "RangeKeyElement": items[-1].range_key, # } return dynamo_json_dump(result) def delete_item(self): name = self.body['TableName'] key = self.body['Key'] hash_key = key['HashKeyElement'] range_key = key.get('RangeKeyElement') return_values = self.body.get('ReturnValues', '') item = dynamodb_backend.delete_item(name, hash_key, range_key) if item: if return_values == 'ALL_OLD': item_dict = item.to_json() else: item_dict = {'Attributes': []} item_dict['ConsumedCapacityUnits'] = 0.5 return dynamo_json_dump(item_dict) else: er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException' return self.error(er)