NewUpgradeAwareHandler creates a new proxy handler with a default flush interval.

NewUpgradeRequestRoundTripper takes two round trippers - one for the underlying TCP connection, and one that is able to write headers to an HTTP request.

MirrorRequest is a round tripper that can be called to get back the calling request as the core round tripper in a chain.

Transport is a transport for text/html content that replaces URLs in html content with the prefix of the proxy server.

UpgradeAwareHandler is a handler for proxy requests that may require an upgrade.

ErrorResponder abstracts error reporting to the proxy handler to remove the need to hardcode a particular error format.

SimpleErrorResponder is the legacy implementation of ErrorResponder for callers that only service a single request/response per proxy.

UpgradeRequestRoundTripper provides an additional method to decorate a request with any authentication or other protocol level information prior to performing an upgrade on the server.