file-upload [VILLEGAS]

.gitignore

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+venv
+.env

app.py

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+import os
+import logging
+from flask import Flask
+from config import Config
+from extensions import db  # ✅ import shared db here
+
+def create_app():
+    app = Flask(__name__)
+    app.config.from_object(Config)
+
+    # Initialize extensions
+    db.init_app(app)  # ✅ binds db to this Flask app
+
+    # Configure logging
+    os.makedirs(app.config['LOG_FOLDER'], exist_ok=True)
+    logging.basicConfig(
+        filename=f"{app.config['LOG_FOLDER']}/app.log",
+        level=logging.INFO,
+        format='%(asctime)s [%(levelname)s] %(message)s'
+    )
+
+    # Import blueprints after db setup
+    from controllers.file_controller import file_bp
+    app.register_blueprint(file_bp)
+
+    # Create tables
+    with app.app_context():
+        db.create_all()
+
+    return app
+
+
+if __name__ == '__main__':
+    app = create_app()
+    app.run(debug=True)

config.py

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+import os
+from dotenv import load_dotenv
+
+# Load environment variables from .env file
+load_dotenv()
+
+class Config:
+    # ✅ Correct MySQL connection string format
+    SQLALCHEMY_DATABASE_URI = (
+        f"mysql+pymysql://{os.getenv('DB_USER')}:{os.getenv('DB_PASSWORD')}@"
+        f"{os.getenv('DB_HOST')}:{os.getenv('DB_PORT')}/{os.getenv('DB_NAME')}"
+    )
+
+    # ✅ Disable SQLAlchemy event system overhead
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+
+    # ⚠️ Fixed typo: "UPLOAD_FOLER" → "UPLOAD_FOLDER"
+    # Also set a fallback path (e.g., "uploads")
+    UPLOAD_FOLDER = os.getenv('UPLOAD_FOLDER', 'uploads')
+
+    # ✅ Set default logging directory
+    LOG_FOLDER = os.getenv('LOG_FOLDER', 'logs')
+
+    # ✅ Enable debug mode if specified, otherwise False
+    DEBUG = os.getenv('FLASK_DEBUG', 'True').lower() in ('true', '1', 'yes')

controllers/file_controller.py

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+import uuid
+from flask import Blueprint, request, jsonify, send_file
+from services.file_service import save_file, update_file, delete_file
+from models.uploaded_file import UploadedFile
+from flask import Blueprint, request, jsonify, send_file, current_app
+import logging
+
+file_bp = Blueprint('file_bp', __name__)
+
+# 🟢 POST — Upload file
+@file_bp.route('/upload', methods=['POST'])
+def upload_file():
+    try:
+        if 'file' not in request.files:
+            return jsonify({'message': 'No file uploaded'}), 400
+
+        file = request.files['file']
+        folder = f"{current_app.config['UPLOAD_FOLDER']}/{uuid.uuid4().hex}"
+        uploaded = save_file(file, folder)
+        return jsonify({'message': 'Upload successful', 'id': uploaded.id, 'path': uploaded.file_path}), 201
+
+    except Exception as e:
+        logging.error(f"Upload error: {e}")
+        return jsonify({'message': str(e)}), 400
+
+
+# 🟡 GET — Retrieve file info or download
+@file_bp.route('/file/<int:file_id>', methods=['GET'])
+def get_file(file_id):
+    try:
+        file = UploadedFile.query.get(file_id)
+        if not file:
+            return jsonify({'message': 'File not found'}), 404
+
+        # You can test using Postman → GET http://localhost:5000/file/<id>
+        return send_file(file.file_path, as_attachment=True)
+    except Exception as e:
+        logging.error(f"Get error: {e}")
+    return jsonify({'message': str(e)}), 400
+
+# 🟠 PUT — Update file
+@file_bp.route('/file/<int:file_id>', methods=['PUT'])
+def update_existing_file(file_id):
+    try:
+        if 'file' not in request.files:
+            return jsonify({'message': 'No file provided'}), 400
+
+        file = request.files['file']
+
+        updated = update_file(file_id, file, current_app.config['UPLOAD_FOLDER'])
+
+        return jsonify({
+            'message': 'File updated successfully',
+            'path': updated.file_path
+        }), 200
+
+    except Exception as e:
+        logging.error(f"Update error: {e}")
+        return jsonify({'message': str(e)}), 400
+
+# 🔴 DELETE — Delete file
+@file_bp.route('/file/<int:file_id>', methods=['DELETE'])
+def delete_existing_file(file_id):
+    try:
+        delete_file(file_id)
+        return jsonify({'message': 'File deleted successfully'}), 200
+
+    except Exception as e:
+        logging.error(f"Delete error: {e}")
+        return jsonify({'message': str(e)}), 400

extensions.py

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+# extensions.py
+from flask_sqlalchemy import SQLAlchemy
+
+# Single shared SQLAlchemy instance
+db = SQLAlchemy()

logs/app.log

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+2025-10-19 20:27:54,937 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
+2025-10-19 20:27:54,937 [INFO] Press CTRL+C to quit
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+2025-10-19 20:28:24,008 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
+2025-10-19 20:28:24,008 [INFO] Press CTRL+C to quit
+2025-10-19 20:28:33,931 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:30:26,578 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:36:57,756 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:36:58,484 [INFO]  * Debugger PIN: 881-545-031
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+2025-10-19 20:38:15,012 [ERROR] Upload error: name 'app' is not defined
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+2025-10-19 20:40:06,799 [INFO]  * Debugger PIN: 881-545-031
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+2025-10-19 20:40:16,288 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:40:17,040 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:40:19,334 [ERROR] Upload error: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?
+2025-10-19 20:40:19,334 [INFO] 127.0.0.1 - - [19/Oct/2025 20:40:19] "POST /upload HTTP/1.1" 400 -
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+2025-10-19 20:40:47,214 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:40:47,919 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:40:56,168 [INFO]  * Detected change in 'C:\\Users\\Ginand\\Documents\\Proglan\\file-upload\\models\\uploaded_file.py', reloading
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+2025-10-19 20:40:57,030 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:41:02,408 [ERROR] Upload error: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?
+2025-10-19 20:41:02,408 [INFO] 127.0.0.1 - - [19/Oct/2025 20:41:02] "POST /upload HTTP/1.1" 400 -
+2025-10-19 20:41:03,492 [ERROR] Upload error: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?
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+2025-10-19 20:41:25,289 [INFO]  * Debugger PIN: 881-545-031
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+2025-10-19 20:41:27,830 [INFO]  * Restarting with stat
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+2025-10-19 20:41:28,586 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:41:30,220 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:41:30,896 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:41:32,813 [ERROR] Upload error: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?
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+2025-10-19 20:41:40,769 [INFO]  * Detected change in 'C:\\Users\\Ginand\\Documents\\Proglan\\file-upload\\app.py', reloading
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+2025-10-19 20:41:41,672 [WARNING]  * Debugger is active!
+2025-10-19 20:41:41,674 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:42:00,185 [INFO]  * Detected change in 'C:\\Users\\Ginand\\Documents\\Proglan\\file-upload\\config.py', reloading
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+2025-10-19 20:42:01,026 [WARNING]  * Debugger is active!
+2025-10-19 20:42:01,028 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:42:02,820 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:42:03,541 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:42:08,910 [ERROR] Upload error: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?
+2025-10-19 20:42:08,911 [INFO] 127.0.0.1 - - [19/Oct/2025 20:42:08] "POST /upload HTTP/1.1" 400 -
+2025-10-19 20:42:09,766 [ERROR] Upload error: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?
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+2025-10-19 20:42:53,691 [INFO]  * Debugger PIN: 881-545-031
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+2025-10-19 20:43:03,863 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
+2025-10-19 20:43:03,863 [INFO] Press CTRL+C to quit
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+2025-10-19 20:43:04,498 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:43:09,374 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
+2025-10-19 20:43:09,374 [INFO] Press CTRL+C to quit
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+2025-10-19 20:43:10,142 [INFO]  * Debugger PIN: 881-545-031
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+2025-10-19 20:44:44,337 [ERROR] Update error: name 'app' is not defined
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+2025-10-19 20:45:18,995 [INFO] WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
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+2025-10-19 20:45:19,670 [INFO]  * Debugger PIN: 881-545-031
+2025-10-19 20:45:21,695 [INFO] File saved: uploads\e491524ff26f42ca911ac06bf4e6c1f9_24SDFDSF.png
+2025-10-19 20:45:21,702 [INFO] File updated: ID=1
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+2025-10-19 20:45:40,098 [INFO] File deleted from storage: uploads\e491524ff26f42ca911ac06bf4e6c1f9_24SDFDSF.png
+2025-10-19 20:45:40,104 [INFO] Record deleted: ID=1
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models/uploaded_file.py

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+from extensions import db
+
+class UploadedFile(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    filename = db.Column(db.String(255), nullable=False)
+    file_path = db.Column(db.String(255), nullable=False)

requirements.txt

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+blinker==1.9.0
+click==8.3.0
+Flask==3.1.2
+Flask-SQLAlchemy==3.1.1
+itsdangerous==2.2.0
+Jinja2==3.1.6
+MarkupSafe==3.0.3
+PyMySQL==1.1.2
+python-dotenv==1.1.1
+SQLAlchemy==2.0.44
+typing_extensions==4.15.0
+Werkzeug==3.1.3

services/file_service.py

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+import os
+import uuid
+from werkzeug.utils import secure_filename
+from models.uploaded_file import UploadedFile
+from app import db
+import logging
+ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'pdf', 'txt'}
+def allowed_file(filename):
+    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
+def save_file(file, base_folder):
+    if not allowed_file(file.filename):
+        raise ValueError('File type not allowed')
+
+    os.makedirs(base_folder, exist_ok=True)
+    filename = secure_filename(file.filename)
+    unique_name = f"{uuid.uuid4().hex}_{filename}"
+    save_path = os.path.join(base_folder, unique_name)
+    file.save(save_path)
+    new_file = UploadedFile(filename=unique_name, file_path=save_path)
+    db.session.add(new_file)
+    db.session.commit()
+    logging.info(f"File saved: {save_path}")
+    return new_file
+
+def update_file(file_id, new_file, base_folder):
+    existing = UploadedFile.query.get(file_id)
+    if not existing:
+        raise ValueError('File not found')
+    if os.path.exists(existing.file_path):
+        os.remove(existing.file_path)
+
+    new_record = save_file(new_file, base_folder)
+    existing.filename = new_record.filename
+    existing.file_path = new_record.file_path
+    db.session.commit()
+    logging.info(f"File updated: ID={file_id}")
+    return existing
+
+def delete_file(file_id):
+    file_record = UploadedFile.query.get(file_id)
+    if not file_record:
+        raise ValueError('File not found')
+    if os.path.exists(file_record.file_path):
+        os.remove(file_record.file_path)
+        logging.info(f"File deleted from storage: {file_record.file_path}")
+
+    db.session.delete(file_record)
+    db.session.commit()
+    logging.info(f"Record deleted: ID={file_id}")