自定义 URL 重写

Question

我想重写一个url，使用UseRewriter中间件很简单。

var rewrite = new RewriteOptions()
    .AddRedirect("Page1From", "Page1To")        // Redirect
    .AddRewrite("Page2From", "Page2To", true);  // Rewrite

app.UseRewriter(rewrite);

结果，url“/Page1From”将重定向到 "Page1To"，url"Page2From" 将显示“ /Page2To" 没有重定向。

我想通过使用数据库中的数据来实现 AddRewrite 方法，但我只找到了如何使用自定义规则进行重定向。

var rewrite = new RewriteOptions()
    .AddRedirect("Page1From", "Page1To")        // Redirect
    .AddRewrite("Page2From", "Page2To", true);  // Rewrite
    .Add(new MoviesRedirectRule(                // Custom Rule
        matchPaths: new[] { "/Page3From1", "/Page3From2", "/Page3From3" },
        newPath: "/Page3To"));

app.UseRewriter(rewrite);

规则如下：

public class MoviesRedirectRule : IRule
{
    private readonly string[] matchPaths;
    private readonly PathString newPath;

    public MoviesRedirectRule(string[] matchPaths, string newPath)
    {
        this.matchPaths = matchPaths;
        this.newPath = new PathString(newPath);
    }

    public void ApplyRule(RewriteContext context)
    {
        var request = context.HttpContext.Request;

        // if already redirected, skip
        if (request.Path.StartsWithSegments(new PathString(this.newPath)))
        {
            return;
        }

        if (this.matchPaths.Contains(request.Path.Value))
        {
            var newLocation = $"{this.newPath}{request.QueryString}";

            var response = context.HttpContext.Response;
            response.StatusCode = StatusCodes.Status302Found;
            context.Result = RuleResult.EndResponse;
            response.Headers[HeaderNames.Location] = newLocation;
        }
    }
}

这将重定向以下 urls:

/Page3From1
/Page3From2
/Page3From3

到/Page3To

我想创建类似的东西，不会重定向，但我想重写 url，这样 url 将保持不变，但它会显示指定 [=45] 的内容=].

谁能告诉我必须对响应对象做哪些更改才能使其正常工作？

Answer 1

RewriteRule 调用 AddRewrite() 时添加的只是替换请求中的 URI 部分 (link to source code):

request.Scheme = scheme;
request.Host = host;
request.Path = pathString;
request.QueryString = query.Add(request.QueryString);

在您的情况下，由于您仅替换 Path 部分，因此 ApplyRule 方法将非常简单：

public void ApplyRule(RewriteContext context)
{
    var request = context.HttpContext.Request;

    if (matchPaths.Contains(request.Path.Value))
    {
        request.Path = newPath;
        context.Result = RuleResult.SkipRemainingRules;
    }
}

自定义 URL 重写

Custom URL Rewriting

asp.net-core-2.0

razor-pages