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.NET: sanitize redirectUrl for logs #2356

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Merged
Korolev Dmitry (DeagleGross) merged 3 commits into from
Nov 21, 2025
Merged

.NET: sanitize redirectUrl for logs #2356

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cc7b4be
sanitize redirectUrl for logs
DeagleGross Nov 20, 2025
4145dd6
use basepath
DeagleGross Nov 20, 2025
1da8bd4
sanitize both path and reddirect url
DeagleGross Nov 20, 2025
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11 changes: 8 additions & 3 deletions dotnet/src/Microsoft.Agents.AI.DevUI/DevUIMiddleware.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
using System.IO.Compression;
using System.Reflection;
using System.Security.Cryptography;
using System.Text.RegularExpressions;
using Microsoft.AspNetCore.StaticFiles;
using Microsoft.Extensions.Primitives;
using Microsoft.Net.Http.Headers;
Expand All @@ -13,8 +14,11 @@ namespace Microsoft.Agents.AI.DevUI;
/// <summary>
/// Handler that serves embedded DevUI resource files from the 'resources' directory.
/// </summary>
internal sealed class DevUIMiddleware
internal sealed partial class DevUIMiddleware
{
[GeneratedRegex(@"[\r\n]+")]
private static partial Regex NewlineRegex();

private const string GZipEncodingValue = "gzip";
private static readonly StringValues s_gzipEncodingHeader = new(GZipEncodingValue);
private static readonly Assembly s_assembly = typeof(DevUIMiddleware).Assembly;
Expand Down Expand Up @@ -70,15 +74,16 @@ public async Task HandleRequestAsync(HttpContext context)
// This ensures relative URLs in the HTML work correctly
if (string.Equals(path, this._basePath, StringComparison.OrdinalIgnoreCase) && !path.EndsWith('/'))
{
var redirectUrl = $"{path}/";
var redirectUrl = this._basePath + "/";
if (context.Request.QueryString.HasValue)
{
redirectUrl += context.Request.QueryString.Value;
}

context.Response.StatusCode = StatusCodes.Status301MovedPermanently;
context.Response.Headers.Location = redirectUrl;
this._logger.LogDebug("Redirecting {OriginalPath} to {RedirectUrl}", path, redirectUrl);

this._logger.LogDebug("Redirecting {OriginalPath} to {RedirectUrl}", NewlineRegex().Replace(path, ""), NewlineRegex().Replace(redirectUrl, ""));
return;
}

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