Mercurial > hg > nginx-quic
view auto/os/darwin @ 6566:ce94f07d5082
HTTP/2: implemented preread buffer for request body (closes #959).
Previously, the stream's window was kept zero in order to prevent a client
from sending the request body before it was requested (see 887cca40ba6a for
details). Until such initial window was acknowledged all requests with
data were rejected (see 0aa07850922f for details).
That approach revealed a number of problems:
1. Some clients (notably MS IE/Edge, Safari, iOS applications) show an error
or even crash if a stream is rejected;
2. This requires at least one RTT for every request with body before the
client receives window update and able to send data.
To overcome these problems the new directive "http2_body_preread_size" is
introduced. It sets the initial window and configures a special per stream
preread buffer that is used to save all incoming data before the body is
requested and processed.
If the directive's value is lower than the default initial window (65535),
as previously, all streams with data will be rejected until the new window
is acknowledged. Otherwise, no special processing is used and all requests
with data are welcome right from the connection start.
The default value is chosen to be 64k, which is bigger than the default
initial window. Setting it to zero is fully complaint to the previous
behavior.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Tue, 24 May 2016 17:37:52 +0300 |
parents | 85dea406e18f |
children | e393c0bf53d3 |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. have=NGX_DARWIN . auto/have_headers CORE_INCS="$UNIX_INCS" CORE_DEPS="$UNIX_DEPS $DARWIN_DEPS" CORE_SRCS="$UNIX_SRCS $DARWIN_SRCS" ngx_spacer=' ' MAIN_LINK= MODULE_LINK="-shared -Wl,-undefined,dynamic_lookup" # kqueue echo " + kqueue found" have=NGX_HAVE_KQUEUE . auto/have have=NGX_HAVE_CLEAR_EVENT . auto/have EVENT_MODULES="$EVENT_MODULES $KQUEUE_MODULE" CORE_SRCS="$CORE_SRCS $KQUEUE_SRCS" EVENT_FOUND=YES NGX_KQUEUE_CHECKED=YES ngx_feature="kqueue's EVFILT_TIMER" ngx_feature_name="NGX_HAVE_TIMER_EVENT" ngx_feature_run=yes ngx_feature_incs="#include <sys/event.h> #include <sys/time.h>" ngx_feature_path= ngx_feature_libs= ngx_feature_test="int kq; struct kevent kev; struct timespec ts; if ((kq = kqueue()) == -1) return 1; kev.ident = 0; kev.filter = EVFILT_TIMER; kev.flags = EV_ADD|EV_ENABLE; kev.fflags = 0; kev.data = 1000; kev.udata = 0; ts.tv_sec = 0; ts.tv_nsec = 0; if (kevent(kq, &kev, 1, &kev, 1, &ts) == -1) return 1; if (kev.flags & EV_ERROR) return 1;" . auto/feature ngx_feature="Darwin 64-bit kqueue millisecond timeout bug" ngx_feature_name=NGX_DARWIN_KEVENT_BUG ngx_feature_run=bug ngx_feature_incs="#include <sys/event.h> #include <sys/time.h>" ngx_feature_path= ngx_feature_libs= ngx_feature_test="int kq; struct kevent kev; struct timespec ts; struct timeval tv, tv0; kq = kqueue(); ts.tv_sec = 0; ts.tv_nsec = 999000000; gettimeofday(&tv, 0); kevent(kq, NULL, 0, &kev, 1, &ts); gettimeofday(&tv0, 0); timersub(&tv0, &tv, &tv); if (tv.tv_sec * 1000000 + tv.tv_usec < 900000) return 1;" . auto/feature # sendfile() CC_AUX_FLAGS="$CC_AUX_FLAGS" ngx_feature="sendfile()" ngx_feature_name="NGX_HAVE_SENDFILE" ngx_feature_run=yes ngx_feature_incs="#include <sys/types.h> #include <sys/socket.h> #include <sys/uio.h> #include <sys/errno.h>" ngx_feature_path= ngx_feature_libs= ngx_feature_test="int s = 0, fd = 1; off_t n; off_t off = 0; n = sendfile(s, fd, off, &n, NULL, 0); if (n == -1 && errno == ENOSYS) return 1" . auto/feature if [ $ngx_found = yes ]; then CORE_SRCS="$CORE_SRCS $DARWIN_SENDFILE_SRCS" fi ngx_feature="atomic(3)" ngx_feature_name=NGX_DARWIN_ATOMIC ngx_feature_run=no ngx_feature_incs="#include <libkern/OSAtomic.h>" ngx_feature_path= ngx_feature_libs= ngx_feature_test="int32_t lock, n; n = OSAtomicCompareAndSwap32Barrier(0, 1, &lock)" . auto/feature