58 lines
No EOL
1.8 KiB
C#
58 lines
No EOL
1.8 KiB
C#
using System.Text.RegularExpressions;
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using Microsoft.AspNetCore.Http;
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namespace RdtClient.Service.Middleware;
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public partial class BaseHrefMiddleware(RequestDelegate next, String basePath)
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{
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[GeneratedRegex(@"<base href=""/""")]
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private partial Regex BodyRegex();
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[GeneratedRegex("(<script.*?src=\")(.*?)(\".*?</script>)")]
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private partial Regex ScriptRegex();
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[GeneratedRegex("(<link.*?href=\")(.*?)(\".*?>)")]
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private partial Regex LinkRegex();
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private readonly String _basePath = $"/{basePath.TrimStart('/').TrimEnd('/')}/";
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public async Task InvokeAsync(HttpContext context)
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{
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var originalBody = context.Response.Body;
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try
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{
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using var newBody = new MemoryStream();
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context.Response.Body = newBody;
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await next(context);
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context.Response.Body = originalBody;
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newBody.Seek(0, SeekOrigin.Begin);
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var responseBody = await new StreamReader(newBody).ReadToEndAsync();
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if (context.Response.StatusCode == 200)
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{
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if (context.Response.ContentType?.Contains("text/html") == true)
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{
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responseBody = BodyRegex().Replace(responseBody, @$"<base href=""{_basePath}""");
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responseBody = ScriptRegex().Replace(responseBody, $"$1{_basePath}$2$3");
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responseBody = LinkRegex().Replace(responseBody, $"$1{_basePath}$2$3");
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context.Response.Headers.Remove("Content-Length");
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await context.Response.WriteAsync(responseBody);
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}
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else
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{
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await context.Response.BodyWriter.WriteAsync(newBody.ToArray());
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}
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}
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}
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finally
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{
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context.Response.Body = originalBody;
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}
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}
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} |