Question

我有以下网址 www.localproject.com:843/user/validate/eyJhbGciOiJodHRwOi8vd3d3LnczLm9yZy8yMDAxLzA0L3htbGRzaWctbW9yZSNobWFjLXNoYTI1NiIsInR5cCI6IkpXVCJ9eyJ0ZW1wVXJsIjoie1wiQ3VzdG9tZXJJZFwiOjEsXCJDb3Vyc2VJZFwiOjEsXCJUb2tlblwiOm51bGwsXCJFeHBpcnlcIjpcIjIwMTgtMDQtMThUMTc6MzU6MTMuOTQ2MjM2NCswNTowMFwifSJ9uvm7jZ3us5UFa1hqh4bod2cSamcxF2rRUbfxs7DHQs

在验证（包括数字等）后，我需要从中提取10到30个字符。例如，我只需要这个

eyJhbGciOiJodHRwOi8vd3d

什么应该是正则表达式？我试过跟随，但它不起作用

^api/user/validate/(^([a-zA-Z\d]){50})

Answer 1

尝试

api\/user\/validate\/(.{23})

可以看到它在这里工作 - https://regex101.com/r/Xr6Ueo/1

Answer 2

您可以使用正则表达式或Substring执行此操作。如果字符串存储在web.config中，您仍然可以使用ConfigurationManager访问它。我建议从Uri中取出不需要的部分。这样一旦你部署到prod，就会有更少的机会崩溃。

var input = new Uri("www.localproject.com:843/user/validate/eyJhbGciOiJodHRwOi8vd3d3LnczLm9yZy8yMDAxLzA0L3htbGRzaWctbW9yZSNobWFjLXNoYTI1NiIsInR5cCI6IkpXVCJ9eyJ0ZW1wVXJsIjoie1wiQ3VzdG9tZXJJZFwiOjEsXCJDb3Vyc2VJZFwiOjEsXCJUb2tlblwiOm51bGwsXCJFeHBpcnlcIjpcIjIwMTgtMDQtMThUMTc6MzU6MTMuOTQ2MjM2NCswNTowMFwifSJ9uvm7jZ3us5UFa1hqh4bod2cSamcxF2rRUbfxs7DHQs");
var environmentAgnosticPath = input.Segments[input.Segments.Length - 1];//take just the part after /validate

//example output: eyJhbGciOiJodHRwOi8vd3d
//I don't know what you mean by 10 - 30 since the example is 23 characters
var resultFromSubstring = environmentAgnosticPath.Substring(0,23);

var pattern = @"[A-Za-z0-9]{10,23}";
Regex regex = new Regex(pattern);
var resultFromRegex = regex.Match(environmentAgnosticPath).Value;

通常regex101是了解正则表达部分的好方法。

C＃Regex for Web.config重写Url

2 个答案: