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fix(vpn): avoid setting session token header twice#18524
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f53cc17 to591a3b7Compare591a3b7 tobafa0c6Comparebafa0c6 tocbf7ec7Comparedeansheather approved these changesJun 24, 2025
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coderdcurrently does not handle a session token header value of the formtoken1, token2. However, it does handle multiple instances of the token header by simply taking the first. This is the default behaviour ofhttp.Header.Get.So, setting the token header twice causes issues when Coder is behind a proxy that merges duplicate headers, such asApache.
This PR ensures we don't set it twice by not sharing one slice between the
HTTPClientand thewebsocket.DialerOptions. It also adds a regression test.