Cesar Toscano

15 papers C 1Journal 4Unranked 10
YearRankTypeTitle / Venue / Authors
2016 conf
ICIAR
Rafael Arrais, Miguel Oliveira, Cesar Toscano, Germano Veiga
2016 J jnl
Proc. IEEE
Volker Krüger, Arnaud Chazoule, Matthew Crosby, Antoine Lasnier, Mikkel Rath Pedersen, Francesco Rovida, Lazaros Nalpantidis, Ronald P. A. Petrick, Cesar Toscano, Germano Veiga
2011 C conf
PRO-VE
Ricardo Almeida, Cesar Toscano, Luis Maia Carneiro, Américo Lopes Azevedo
2009 J jnl
Comput. Ind.
Claudia-Melania Chituc, Américo Lopes Azevedo, Cesar Toscano
2008 conf
BASYS
Claudia-Melania Chituc, Américo Azevedo, Cesar Toscano
2008 J jnl
Comput. Ind.
Claudia-Melania Chituc, Cesar Toscano, Américo Lopes Azevedo
2007 conf
IEEE SCC
Claudia-Melania Chituc, Cesar Toscano, Américo Lopes Azevedo
2007 conf
IESA
Claudia-Melania Chituc, Cesar Toscano, Américo Lopes Azevedo
2007 conf
Virtual Enterprises and Collaborative Networks
Claudia-Melania Chituc, Cesar Toscano, Américo Lopes Azevedo
2006 conf
BASYS
Américo Azevedo, Paula Silva, Cesar Toscano, João M. P. Cardoso
2005 J jnl
Int. J. Comput. Integr. Manuf.
Américo Lopes Azevedo, Cesar Toscano, Jorge Pinho de Sousa
2001 conf
PROLAMAT
António Lucas Soares, Cesar Toscano, Jorge Pinho de Sousa
2001 conf
ICEIS (1)
Américo Lopes Azevedo, Cesar Toscano, João Bastos
1999 conf
ICEIS
Américo Lopes Azevedo, Cesar Toscano
1998 conf
PROLAMAT
Américo Lopes Azevedo, João Bastos, Jorge Pinho de Sousa, Cesar Toscano
s3-storage/s3_test.py
← Index s3-storage/s3_test.py python
#!/usr/bin/env python3
"""
Simple script to test S3 connectivity and download.
Usage: python s3_test.py
"""

import os
import time
import tempfile
from minio import Minio
from minio.error import S3Error
from dotenv import load_dotenv

# Load environment variables
load_dotenv()

def get_minio_client():
    """Create and return a Minio client using credentials from .env file"""
    endpoint = os.getenv("S3_ENDPOINT")
    access_key = os.getenv("S3_ACCESS_KEY")
    secret_key = os.getenv("S3_SECRET_KEY")
    secure = True 
    
    print(f"Connecting to S3 endpoint: {endpoint} (secure={secure})")
    
    return Minio(
        endpoint=endpoint,
        access_key=access_key,
        secret_key=secret_key,
        secure=secure
    )

def test_connection():
    """Test basic connectivity to S3"""
    try:
        client = get_minio_client()
        
        # Try to list buckets as a basic connectivity test
        buckets = client.list_buckets()
        print(f"Successfully connected to S3. Found {len(buckets)} buckets:")
        for bucket in buckets:
            print(f"  - {bucket.name}")
        
        return client
    except Exception as e:
        print(f"Failed to connect to S3: {e}")
        return None

def test_bucket_access(client, bucket_name):
    """Test access to a specific bucket"""
    try:
        exists = client.bucket_exists(bucket_name)
        if exists:
            print(f"Bucket '{bucket_name}' exists and is accessible")
            
            # List a few objects to verify access
            count = 0
            objects = []
            for obj in client.list_objects(bucket_name, recursive=True):
                print(f"  - {obj.object_name} ({obj.size} bytes)")
                objects.append(obj)
                count += 1
                if count >= 5:
                    break
            
            print(f"Found at least {len(objects)} objects in bucket")
            return objects
        else:
            print(f"Bucket '{bucket_name}' does not exist or is not accessible")
            return []
    except Exception as e:
        print(f"Error accessing bucket '{bucket_name}': {e}")
        return []

def test_download(client, bucket_name, object_name):
    """Test downloading a specific object"""
    try:
        print(f"Attempting to download: {object_name}")
        start_time = time.time()
        
        # Create a temporary file to store the downloaded object
        with tempfile.NamedTemporaryFile(delete=False) as temp_file:
            temp_path = temp_file.name
        
        # Download the object
        client.fget_object(bucket_name, object_name, temp_path)
        
        # Check if the file was downloaded successfully
        file_size = os.path.getsize(temp_path)
        elapsed_time = time.time() - start_time
        
        print(f"Download successful: {file_size} bytes in {elapsed_time:.2f} seconds")
        print(f"Average download speed: {file_size/elapsed_time/1024:.2f} KB/s")
        
        # Clean up
        os.unlink(temp_path)
        return True
    except S3Error as e:
        print(f"S3 Error during download: {e}")
        return False
    except Exception as e:
        print(f"Error downloading object: {e}")
        return False

def main():
    """Main function to run all tests"""
    print("=== S3 Connectivity Test ===")
    
    # Test basic connectivity
    client = test_connection()
    if not client:
        return
    
    # Get bucket name from environment variable
    bucket_name = "redb"
    print(f"\n=== Testing Access to Bucket: {bucket_name} ===")
    objects = test_bucket_access(client, bucket_name)
    
    if objects:
        # Test downloading the first object
        first_object = objects[0].object_name
        print(f"\n=== Testing Download of Object: {first_object} ===")
        test_download(client, bucket_name, first_object)
        
        # If the first one worked, let's try a specific file from the error log
        print(f"\n=== Testing Download of Specific Object ===")
        specific_object = "00/06/00062073114defac39cb7ab9cb99a0b77c535a09a241c60d47ddd0b6431629f1.zip"
        test_download(client, bucket_name, specific_object)

if __name__ == "__main__":
    main()