feat(init): initial commit for Flask-based temporary file transfer service (web UI, API, SQLite)

app.py

@@ -0,0 +1,98 @@
+import os
+import uuid
+from datetime import datetime
+from flask import Flask, request, render_template, send_file, jsonify, url_for, abort
+from config import UPLOAD_FOLDER, SECRET_KEY, MAX_CONTENT_LENGTH, EXPIRY_OPTIONS
+from database import init_db, add_file, get_file, delete_file, cleanup_expired
+
+app = Flask(__name__)
+app.config['SECRET_KEY'] = SECRET_KEY
+app.config['MAX_CONTENT_LENGTH'] = MAX_CONTENT_LENGTH
+app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
+
+os.makedirs(UPLOAD_FOLDER, exist_ok=True)
+init_db()
+
+@app.route('/')
+def index():
+    return render_template('index.html', expiry_options=EXPIRY_OPTIONS)
+
+@app.route('/upload', methods=['POST'])
+def upload():
+    if 'file' not in request.files:
+        return jsonify({'error': 'No file provided'}), 400
+
+    file = request.files['file']
+    if file.filename == '':
+        return jsonify({'error': 'No file selected'}), 400
+
+    expiry_key = request.form.get('expiry', '24h')
+    expiry_seconds = EXPIRY_OPTIONS.get(expiry_key, EXPIRY_OPTIONS['24h'])
+    expiry_hours = expiry_seconds // 3600
+
+    file_id = str(uuid.uuid4())
+    filename = file.filename
+    filepath = os.path.join(UPLOAD_FOLDER, file_id)
+    file.save(filepath)
+
+    filesize = os.path.getsize(filepath)
+    add_file(file_id, filename, filepath, filesize, expiry_hours)
+
+    share_url = url_for('download_file', file_id=file_id, _external=True)
+    return jsonify({'id': file_id, 'filename': filename, 'share_url': share_url})
+
+@app.route('/api/upload', methods=['POST'])
+def api_upload():
+    if 'file' not in request.files:
+        return jsonify({'error': 'No file provided'}), 400
+
+    file = request.files['file']
+    if file.filename == '':
+        return jsonify({'error': 'No file selected'}), 400
+
+    expiry_key = request.form.get('expiry', '24h')
+    expiry_seconds = EXPIRY_OPTIONS.get(expiry_key, EXPIRY_OPTIONS['24h'])
+    expiry_hours = expiry_seconds // 3600
+
+    file_id = str(uuid.uuid4())
+    filename = file.filename
+    filepath = os.path.join(UPLOAD_FOLDER, file_id)
+    file.save(filepath)
+
+    filesize = os.path.getsize(filepath)
+    add_file(file_id, filename, filepath, filesize, expiry_hours)
+
+    share_url = url_for('download_file', file_id=file_id, _external=True)
+    return jsonify({'id': file_id, 'filename': filename, 'filesize': filesize, 'expiry_hours': expiry_hours, 'share_url': share_url})
+
+@app.route('/file/<file_id>')
+def download_file(file_id):
+    cleanup_expired()
+    row = get_file(file_id)
+    if not row:
+        abort(404)
+    return render_template('download.html', file=row)
+
+@app.route('/api/file/<file_id>')
+def api_get_file(file_id):
+    cleanup_expired()
+    row = get_file(file_id)
+    if not row:
+        return jsonify({'error': 'File not found or expired'}), 404
+    return jsonify({
+        'id': row['id'],
+        'filename': row['filename'],
+        'filesize': row['filesize'],
+        'created_at': row['created_at'],
+        'expires_at': row['expires_at']
+    })
+
+@app.route('/download/<file_id>')
+def serve_file(file_id):
+    row = get_file(file_id)
+    if not row:
+        abort(404)
+    return send_file(row['filepath'], download_name=row['filename'], as_attachment=True)
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=5000, debug=True)