Header field related functions are now gathered into FieldStore class.
This commit only handles request. Subsequent commit will do the same
thing for response.
We modeled max_header_fields and header_field_buffer limit from Apache
configuration directives. In Apache, they are only applied to request
header fields, while we applied both request and response. Since
nghttpx is used as reverse proxy and backend server is relatively
"trusted", this commit removes the application to response header
fields.
It seems that using ev_feed_event to signal write operation is much
faster than starting watcher. This is probably due to the fact that
we don't need to wait in event loop. The same thing cannot be done in
HTTP/2 frontend, since this will raise write operation for each stream
HEADER/DATA write, which leads to very small packets, hurting
performance. Interestingly, HTTP/1 frontend also suffers the same
performance hit.
This change is required to show path attribute to mruby script. It is
desirable to construct URI from parts. Just checking method and path
is "*" is awkward.
To achieve host-path backend routing, we changed behaviour of
--backend-http2-connections-per-worker. It now sets the number of
HTTP/2 physical connections per pattern group if pattern is used in -b
option.
Fixes GH-292
-b option syntax is now <HOST>,<PORT>[;<PATTERN>[:...]]. The optional
<PATTERN>s specify the request host and path it is used for. The
<PATTERN> can contain path, host + path or host. The matching rule is
closely designed to ServeMux in Go programming language.
This commit makes sure that WebSocket upgrade works for HTTP/1.1
frontend and backend pair. Actually, this implementation probably
supports other upgrade as well, other than HTTP/2 Upgrade, which is
handled specially in other place.
It turns out that the cause of complication in backend request line
construction is a absolute-form in HTTP/1 request. In HTTP/2, we have
separated pseudo-header fields and no problem at all. In this commit,
we parse request URI in HTTP/1 frontend and extract values from it to
make backend logic simpler. This patch removes host header field
emission in HTTP/2 backend if :authority is emitted. It also rewrites
host header field with authority part in absolute-form URI as per RFC
7230.
Currently, we use same number of HTTP/2 sessions per worker with given
backend addresses. New option to specify the number of HTTP/2 session
per worker will follow.
Tatsuhiro Tsujikawa
Lucas Pardue
Stefan Eissing