// See https://github.com/microsoft/reverse-proxy/blob/51d797986b1fea03500a1ad173d13a1176fb5552/src/ReverseProxy/Forwarder/RequestUtilities.cs#L61-L83
public async Task RestrictedHeaders_CopiedIfAllowed(string names, int expected)
{
var httpContext = new DefaultHttpContext();
var trailerFeature = new TestTrailersFeature();
httpContext.Features.Set <IHttpResponseTrailersFeature>(trailerFeature);
var proxyResponse = new HttpResponseMessage();
proxyResponse.TrailingHeaders.TryAddWithoutValidation(HeaderNames.Connection, "value1");
proxyResponse.TrailingHeaders.TryAddWithoutValidation(HeaderNames.TransferEncoding, "value2");
proxyResponse.TrailingHeaders.TryAddWithoutValidation(HeaderNames.KeepAlive, "value3");
var allowed = names.Split(';');
var transform = new ResponseTrailersAllowedTransform(allowed);
var transformContext = new ResponseTrailersTransformContext()
{
HttpContext = httpContext,
ProxyResponse = proxyResponse,
HeadersCopied = false,
};
await transform.ApplyAsync(transformContext);
Assert.True(transformContext.HeadersCopied);
Assert.Equal(expected, trailerFeature.Trailers.Count());
foreach (var header in trailerFeature.Trailers)
{
Assert.Contains(header.Key, allowed, StringComparer.OrdinalIgnoreCase);
}
}
public async Task RemoveTrailerFromFeature_Success(string names, string values, int status, ResponseCondition condition, string removedHeader, string expected)
{
var httpContext = new DefaultHttpContext();
httpContext.Response.StatusCode = status;
var trailerFeature = new TestTrailersFeature();
httpContext.Features.Set <IHttpResponseTrailersFeature>(trailerFeature);
var proxyResponse = new HttpResponseMessage();
foreach (var pair in TestResources.ParseNameAndValues(names, values))
{
trailerFeature.Trailers.Add(pair.Name, pair.Values);
}
var transform = new ResponseTrailerRemoveTransform(removedHeader, condition);
await transform.ApplyAsync(new ResponseTrailersTransformContext()
{
HttpContext = httpContext,
ProxyResponse = proxyResponse,
HeadersCopied = true,
});
var expectedHeaders = expected.Split("; ", StringSplitOptions.RemoveEmptyEntries);
Assert.Equal(expectedHeaders, trailerFeature.Trailers.Select(h => h.Key));
}
public async Task AddResponseTrailer_Success(string startValue, int status, string value, bool append, bool always, string expected)
{
var httpContext = new DefaultHttpContext();
var trailerFeature = new TestTrailersFeature();
httpContext.Features.Set <IHttpResponseTrailersFeature>(trailerFeature);
trailerFeature.Trailers["name"] = startValue.Split(";", System.StringSplitOptions.RemoveEmptyEntries);
httpContext.Response.StatusCode = status;
var transformContext = new ResponseTrailersTransformContext()
{
HttpContext = httpContext,
ProxyResponse = new HttpResponseMessage(),
HeadersCopied = true,
};
var transform = new ResponseTrailerValueTransform("name", value, append, always);
await transform.ApplyAsync(transformContext);
Assert.Equal(expected.Split(";", System.StringSplitOptions.RemoveEmptyEntries), trailerFeature.Trailers["name"]);
}
public void TakeHeader_HeadersCopied_ReturnsNothing()
{
var httpContext = new DefaultHttpContext();
var trailerFeature = new TestTrailersFeature();
httpContext.Features.Set <IHttpResponseTrailersFeature>(trailerFeature);
var proxyResponse = new HttpResponseMessage();
proxyResponse.TrailingHeaders.Add("Name", "value1");
var result = ResponseTrailersTransform.TakeHeader(new ResponseTrailersTransformContext()
{
HttpContext = httpContext,
ProxyResponse = proxyResponse,
HeadersCopied = true,
}, "name");
Assert.Equal(StringValues.Empty, result);
Assert.False(trailerFeature.Trailers.TryGetValue("name", out var _));
Assert.Equal(new[] { "value1" }, proxyResponse.TrailingHeaders.GetValues("name"));
}
public async Task TransformResponseTrailersAsync_RemovesRestrictedHeaders()
{
var transformer = HttpTransformer.Default;
var httpContext = new DefaultHttpContext();
var trailersFeature = new TestTrailersFeature();
httpContext.Features.Set <IHttpResponseTrailersFeature>(trailersFeature);
var proxyResponse = new HttpResponseMessage();
foreach (var header in RestrictedHeaders)
{
Assert.True(proxyResponse.TrailingHeaders.TryAddWithoutValidation(header, "value"));
}
await transformer.TransformResponseTrailersAsync(httpContext, proxyResponse);
foreach (var header in RestrictedHeaders)
{
Assert.False(trailersFeature.Trailers.ContainsKey(header));
}
}