服务器程序可以下载文件"图像.jpg"import flaskimport osapp=flask.Flask(__name__)@app.route("/")def index(): if "fileName" not in flask.request.values: return "图像.jpg" else: data = b"" try: _____________________________________________ if fileName != "" and os.path.exists(fileName): fobj = open(fileName, "rb") _________________________ fobj.close() except Exception as err: data = str(err).encode() return dataif __name__=="__main__": app.run()缺失的语句是
A.
fileName = flask.request.values.get("fileName"); data = fobj.read()
B.
fileName = flask.request.args.get("fileName"); data = fobj.read()
C.
fileName = flask.request.form.get("fileName"); data = fobj.read()