Motivation: HttpClientUpgradeHandler currently throws an IllegalStateException when the server sends a '101 Switching Protocols' response that has no 'Upgrade' header. Some servers do not send the 'Upgrade' header on a successful protocol upgrade and we could safely assume that the server accepted the requested protocol upgrade in such a case, looking from the response status code (101) Modifications: - Do not throw an IllegalStateException when the server responded 101 without a 'Upgrade' header - Note that we still check the equality of the 'Upgrade' header when it is present. Result: - Fixes #4523 - Better interoperability |
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pom.xml |