Details
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Bug
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Resolution: Done
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P3: Somewhat important
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5.14.1
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None
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Qt 5.14.1 on linux, but I guess it affects all platforms and all Qt versions that support HTTP2
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603eaa9fbb250ce1f4ec5a5a9750a115ef08a956 (qt/qtbase/5.15)
Description
When HTTP2 is enabled for a http (plain) request and the server supports HTTP2 upgrade, Qt does not send the HTTP/2 Connection Preface (magic) after the "HTTP/1.1 101 Switching Protocols" response is received. From what I read in the RFCs, it's hard to say if the client is really required to do so when the connection is upgraded, but:
- The connection hangs until a connection timeout on real HTTP2 servers
- curl sends the magic (and the same servers that hang with Qt work with curl)