file-upload [TAMBIGA]

.gitignore

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+.env
+venv/

app.py

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+import os
+import logging
+from flask import Flask
+from config import Config
+from extensions import db  
+
+def create_app():
+    app = Flask(__name__)
+    app.config.from_object(Config)
+
+    # Initialize db with app
+    db.init_app(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'
+    )
+
+    # Register blueprints
+    from controllers.file_controller import file_bp
+    app.register_blueprint(file_bp)
+
+    # Create tables
+    with app.app_context():
+        db.create_all()
+
+    return app
+
+app = create_app()
+
+if __name__ == '__main__':
+    app.run(debug=True)

config.py

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+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+class Config:
+    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')}"
+    )
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+    UPLOAD_FOLDER = os.getenv('UPLOAD_FOLDER', 'uploads')
+    LOG_FOLDER = 'logs'
+    DEBUG = True

controllers/file_controller.py

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+import uuid
+import logging
+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 config import Config
+
+file_bp = Blueprint('file_bp', __name__)
+
+@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"{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
+
+@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
+        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
+
+@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, 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
+
+@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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+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()

logs/app.log

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+2025-10-18 11:28:33,106 [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
+2025-10-18 11:28:33,107 [INFO] Press CTRL+C to quit
+2025-10-18 11:28:33,108 [INFO]  * Restarting with stat
+2025-10-18 11:28:33,731 [WARNING]  * Debugger is active!
+2025-10-18 11:28:33,768 [INFO]  * Debugger PIN: 125-425-247
+2025-10-18 11:31:34,041 [INFO] 127.0.0.1 - - [18/Oct/2025 11:31:34] "POST /upload HTTP/1.1" 400 -
+2025-10-18 11:37:48,094 [INFO] 127.0.0.1 - - [18/Oct/2025 11:37:48] "POST /upload HTTP/1.1" 400 -
+2025-10-18 11:39:04,317 [INFO] 127.0.0.1 - - [18/Oct/2025 11:39:04] "POST /upload HTTP/1.1" 400 -
+2025-10-18 11:40:22,064 [INFO] File saved: uploads/252487abf6e14a39bfa40b72412da69e/1aec644281434ee2a219a2f2f8e3a5b1_23790439261-2.pdf
+2025-10-18 11:40:22,072 [INFO] 127.0.0.1 - - [18/Oct/2025 11:40:22] "POST /upload HTTP/1.1" 201 -
+2025-10-18 11:47:02,491 [INFO] 127.0.0.1 - - [18/Oct/2025 11:47:02] "GET /file/1 HTTP/1.1" 200 -
+2025-10-18 11:48:51,208 [ERROR] Update error: name 'app' is not defined
+2025-10-18 11:48:51,210 [INFO] 127.0.0.1 - - [18/Oct/2025 11:48:51] "PUT /file/1 HTTP/1.1" 400 -
+2025-10-18 11:49:15,582 [ERROR] Update error: name 'app' is not defined
+2025-10-18 11:49:15,583 [INFO] 127.0.0.1 - - [18/Oct/2025 11:49:15] "PUT /file/1 HTTP/1.1" 400 -
+2025-10-18 11:52:23,076 [INFO]  * Detected change in '/Users/Zander/flask_file_upload_mvc/controllers/file_controller.py', reloading
+2025-10-18 11:52:23,477 [INFO]  * Restarting with stat
+2025-10-18 11:52:24,544 [WARNING]  * Debugger is active!
+2025-10-18 11:52:24,573 [INFO]  * Debugger PIN: 125-425-247
+2025-10-18 11:52:25,660 [INFO]  * Detected change in '/Users/Zander/flask_file_upload_mvc/controllers/file_controller.py', reloading
+2025-10-18 11:52:25,849 [INFO]  * Restarting with stat
+2025-10-18 11:52:26,589 [WARNING]  * Debugger is active!
+2025-10-18 11:52:26,606 [INFO]  * Debugger PIN: 125-425-247
+2025-10-18 11:52:57,097 [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
+2025-10-18 11:52:57,098 [INFO] Press CTRL+C to quit
+2025-10-18 11:52:57,099 [INFO]  * Restarting with stat
+2025-10-18 11:52:57,766 [WARNING]  * Debugger is active!
+2025-10-18 11:52:57,788 [INFO]  * Debugger PIN: 125-425-247
+2025-10-18 11:53:08,816 [INFO] File saved: uploads/7d00800752d64e77bce7e5cb0a37a406_ERD_Dormitally.pdf
+2025-10-18 11:53:08,831 [INFO] File updated: ID=1
+2025-10-18 11:53:08,834 [INFO] 127.0.0.1 - - [18/Oct/2025 11:53:08] "PUT /file/1 HTTP/1.1" 200 -
+2025-10-18 11:53:41,896 [INFO] File deleted from storage: uploads/7d00800752d64e77bce7e5cb0a37a406_ERD_Dormitally.pdf
+2025-10-18 11:53:41,901 [INFO] Record deleted: ID=1
+2025-10-18 11:53:41,902 [INFO] 127.0.0.1 - - [18/Oct/2025 11:53:41] "DELETE /file/1 HTTP/1.1" 200 -
+2025-10-19 21:53:39,376 [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 21:53:39,376 [INFO] Press CTRL+C to quit
+2025-10-19 21:53:39,378 [INFO]  * Restarting with stat
+2025-10-19 21:53:39,891 [WARNING]  * Debugger is active!
+2025-10-19 21:53:39,924 [INFO]  * Debugger PIN: 820-901-174
+2025-10-19 22:00:48,564 [INFO] File saved: uploads/7f799bf24a634687a65c7b953243be31/90c1b158498d4b4783853be14fd6035b_ERD_Dormitally.pdf
+2025-10-19 22:00:48,570 [INFO] 127.0.0.1 - - [19/Oct/2025 22:00:48] "POST /upload HTTP/1.1" 201 -
+2025-10-19 22:09:16,689 [INFO] 127.0.0.1 - - [19/Oct/2025 22:09:16] "GET /3 HTTP/1.1" 404 -
+2025-10-19 22:09:48,774 [INFO] 127.0.0.1 - - [19/Oct/2025 22:09:48] "GET /file/3 HTTP/1.1" 200 -
+2025-10-19 22:10:14,576 [INFO] File saved: uploads/04a938cda90548a8bb5b55b271b5b2b1_23790439261.pdf
+2025-10-19 22:10:14,594 [INFO] File updated: ID=3
+2025-10-19 22:10:14,597 [INFO] 127.0.0.1 - - [19/Oct/2025 22:10:14] "PUT /file/3 HTTP/1.1" 200 -
+2025-10-19 22:10:28,744 [INFO] File deleted from storage: uploads/04a938cda90548a8bb5b55b271b5b2b1_23790439261.pdf
+2025-10-19 22:10:28,749 [INFO] Record deleted: ID=3
+2025-10-19 22:10:28,750 [INFO] 127.0.0.1 - - [19/Oct/2025 22:10:28] "DELETE /file/3 HTTP/1.1" 200 -

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
+greenlet==3.2.4
+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
+import logging
+from werkzeug.utils import secure_filename
+from models.uploaded_file import UploadedFile
+from extensions import db
+
+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')
+
+    # remove old file if exists
+    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}")