Case-sensitive HttpHeaders with ReadOnlyHttpHeaders

[spencergibb]

Spring Cloud recently upgraded to boot 3.4.0-M1 and I came across an interesting regression. Spring Cloud Gateway has various filters that work on http headers. After upgrading to framework 6.2.0-M6 I ran into a situation trying to get a "host" header using getFirst(HttpHeaders.HOST). The host header existed, but as lower case. The input value to HttpHeaders is a ReadOnlyHttpHeaders but it appears that it is not case-sensitive. I had to work around it by creating a new HttpHeaders object and add all the values from the original. Does this ring any bells?

[rstoyanchev]

I don't see anything that stands out in the commit history for 6.2. How would we reproduce this?

[spring-projects-issues]

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[spring-projects-issues]

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[spencergibb]

Sorry for the delay, I'll find the place in our build that was failing.

[spencergibb]

@rstoyanchev this is the commit to fix things and make them case sensitive again spring-cloud/spring-cloud-gateway@b362a91

And this is the test that fails

https://github.com/spring-cloud/spring-cloud-gateway/blob/508ffeb51af720f3e12d4d87f22d7f360531085e/spring-cloud-gateway-server/src/test/java/org/springframework/cloud/gateway/test/GatewayIntegrationTests.java#L115-L131

[spencergibb]

Specifically, this line fails spring-cloud/spring-cloud-gateway@b362a91#diff-3b5acb6faa4abf622703749c7fe9fb7df8c98536e48a642ba7e9b3d2cc7a2a1dR114