服务器上的DateTime时间戳验证 [英] Server side Validation for DateTime Stamp

问题描述

在我的应用程序中，服务器端日期验证是通过IsDate完成的，这在行为上是非常不一致的。我使用了isValid（ USdate，DateVar），它可以很好地处理传入的日期，但是当DateVar是日期时间戳时，它将失败。 DateVar中的值可以是任何东西，日期，时间，日期&时间甚至一些无效的数据。如果我将日期掩码与isValid一起使用，则其行为类似于isDate，并且没有任何用处。我如何才能做到这一点。

In my application, server side date validations were done through IsDate which is very inconsistent in behavior. I used isValid("USdate",DateVar), that works fine with incoming dates, but when DateVar is a date time stamp it fails. Values coming in DateVar could be anything, a date, a time, a date & time or even some invalid data. If I use Date mask with isValid, that behaves like isDate and of no use. How I can accomplish this.

推荐答案

所有通过请求到达的日期-通过URL参数，表单提交，cookie ，等等-将是 strings ，而不是日期。

All "dates" that will be arriving via a request - be they via a URL parameter, a form submission, a cookie, etc - will be strings, not dates.

您需要做的是确定允许的字符串格式，并进行验证

What you need to do is to work out what string formats you will allow, and validate them accordingly.

EG：您可能认为 yyyy-mm-dd 可以，但是您不会接受 m / d / yy 。您可以将它们作为三个单独的组件传递给 y ， m 和 d 。但是您真的不应该尝试接受任何旧格式，因为每种格式都需要有一个验证器，而且那里的收益率递减法则：人们不会期望使用任何格式他们喜欢;他们会期待您的指导。您还需要注意，如果您要求我输入今天的日期，我会给您2015年4月5日的信息。但是对于您来说，这可能代表4月5日。

EG: you might decide that yyyy-mm-dd is OK, but you won't accept m/d/yy. You might pass them as three separate components for y, m and d. But you really oughtn't try to accept any old format, as you will need to have a validator for each format, and there's a law of diminishing returns there: people won't expect to use any format they like; they'll be expecting you to guide them. You also need to be mindful that if you ask me to type in today's date, I'd give you 4/5/2015. But to you that might represent April 5.

给出各种月长和leap年规则，这实际上是查看和输入字符串是否代表一个最简单，最可靠的方法。日期以可接受的格式执行此操作：

Given various month-length and leap-year rules, really the easiest and most reliable way to see if and input string represents a date in an acceptable format do this:

• 验证格式掩码，例如：如果您接受 yyyy- mm-dd ，则输入必须为 \d {4} -\d {2} -\d {2} 。然后至少您知道字符串已经正确构成。


• 然后从字符串中提取组件，并尝试使用它们创建日期对象。如果没有错误：可以。


• 最后一次：检查日期范围内/日期之外的任何日期边界。

• Validate the format mask, eg: if you're accepting yyyy-mm-dd, then the input needs to be \d{4}-\d{2}-\d{2}. Then at least you know the string has been formed properly.
• Then extract the components from the string, and attempt to create a date object with them. If it doesn't error: it's OK.
• Last: check any date boundaries within / outwith which the date needs to fall.

这篇关于服务器上的DateTime时间戳验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！