117 - web层 - web请求进入 - Django、Flask

web层作用

这里主要是处理接受的数据异常
返回异常
用到的异常：参数异常ValueError

例子

from django.http import JsonResponse
def i_xxx(request):
    try:
        req = json.loads(request.body)
        data = req.get("data", None)
        if data is None:
            raise ValueError("缺少data参数！")
        id = data.get("id", None)
        if id is None:
            raise ValueError("缺少id参数！")
        flag = xxx(id, data)
        return_data = {"code": "10001", "result": flag, "errMsg": "ok"}
        return JsonResponse(return_data)
    except Exception as e:
        return_data = {"code": "10002", "result": "", "errMsg": str(e)}
        return JsonResponse(return_data)