sendfile option don't set any default for now which makes the validation fail
(and then tests) since no boolean is given. For now just return when the value
is not set.
on OSX socket.TCP_FASTOPEN is set but make the server enter in a loop while
trying to set the options which makes gunicorn unusable.
For now remove TCP_FASTOPEN option until we find a solution
The --no-sendfile option had a confusing entry in the usage message.
Even though sendfile is enabled by default, the --no-sendfile flag
showed a true value as the default, which could be interpreted to
mean that by default sendfile support is disabled.
This change makes the default "None", meaning sendfile is not
disabled, which is hopefully slightly more clear.
Close#1156
Since the updated RFC 7230 implys that new Headers Key and Value should be
sent as USASCII only don't try to test utf8 headers in examples.
We now only encode them to ascii. Gunicorn will fail if it's unable to encode
them letting the responsability to the application to correctly encode the
response. (we are just a gateway).
While i'm here simplify the code to not create an extra function only used at
one place.
NOTE: if anyone come to a better solution, i am happy to revisit it on the
next release.
fix#1151
A safe and reliable check for whether a file descriptor supports mmap
is to directly check if it is seekable. However, some seekable file
descriptors may also report a zero size when calling fstat. If there
is no content length specified for the response and it cannot be
determined from the file descriptor then it is not possible to know
what chunk size to send to the client. In this case, is it necessary
to fall back to unwinding the body by iteration.
The above conditions together reveal a straightforward and reliable
way to check for sendfile support. This patch modifies the Response
class to assert these conditions using a try/catch block as part of
a new, simplified sendfile method. This method returns False if it
is not possible to serve the response using sendfile. Otherwise, it
serves the response and returns True. By returning False when SSL is
in use, the code is made even simpler by removing the special support
for SSL, which is served well enough by the iteration protocol.
Fix#1038
