HTTP HTTP/2 # Server-side HTTP/1.1 101 Switching! HTTP/1.1 200 OK Date: Thu, 09 Nov 2010 14:49:00 GMT Server: test-server/fake Last-Modified: Tue, 13 Jun 2000 12:10:00 GMT Content-Length: 6 Content-Type: text/html lies! HTTP/1.1 101 Switching! # listen to the upgrade request! upgrade # Client-side http http/2 HTTP/2 upgrade with lying server http://%HOSTIP:%HTTPPORT/1801 --http2 GET /1801 HTTP/1.1 Host: %HOSTIP:%HTTPPORT User-Agent: curl/%VERSION Accept: */* Connection: Upgrade, HTTP2-Settings Upgrade: %H2CVER HTTP2-Settings: AAMAAABkAARAAAAAAAIAAAAA # CURLE_HTTP2: Send failure: Broken pipe 16