tornadoweb/tornado — pull request #1124 by tarnfeld (2014-07-22 16:52:15+00:00)
Title: Support for non-RFC compliant header prefixes

When using keep-alive connections, some HTTP implementations insert unexpected and extra CRLF tokens between each connection, which can result in the next request being prefixed with a CRLF.

Some other client/server implementations are tolerant of this, and for example this bug doesn't show up when using the Go net/http library.