asp.net-core-2.0 - 自定义网址重写

Question

我想使用UseRewriter中间件重写一个简单的URL。

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

app.UseRewriter(rewrite);

结果是，URL“/Page1From”将被重定向到“Page1To”，URL“Page2From”将显示“/Page2To”的内容而无需重定向。

我想通过使用数据库中的数据来实现AddRewrite方法，但是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URL:

/Page3From1

/Page3From2

/Page3From3

到/Page3To

我想创建类似的内容，但不会重定向，但我想重写该URL，以便该URL保持不变，但将显示指定URL的内容。

有人可以告诉我为了使响应对象起作用我必须进行哪些更改？

Answer 1

调用RewriteRule时添加的AddRewrite()只是替换了请求中的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;
    }
}