Mercurial > hg > nginx
view auto/sources @ 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 | 8f038068f4bc |
children | 1064ea81ed3a |
line wrap: on
line source
# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. CORE_MODULES="ngx_core_module ngx_errlog_module ngx_conf_module" CORE_INCS="src/core" CORE_DEPS="src/core/nginx.h \ src/core/ngx_config.h \ src/core/ngx_core.h \ src/core/ngx_log.h \ src/core/ngx_palloc.h \ src/core/ngx_array.h \ src/core/ngx_list.h \ src/core/ngx_hash.h \ src/core/ngx_buf.h \ src/core/ngx_queue.h \ src/core/ngx_string.h \ src/core/ngx_parse.h \ src/core/ngx_parse_time.h \ src/core/ngx_inet.h \ src/core/ngx_file.h \ src/core/ngx_crc.h \ src/core/ngx_crc32.h \ src/core/ngx_murmurhash.h \ src/core/ngx_md5.h \ src/core/ngx_sha1.h \ src/core/ngx_rbtree.h \ src/core/ngx_radix_tree.h \ src/core/ngx_rwlock.h \ src/core/ngx_slab.h \ src/core/ngx_times.h \ src/core/ngx_shmtx.h \ src/core/ngx_connection.h \ src/core/ngx_cycle.h \ src/core/ngx_conf_file.h \ src/core/ngx_module.h \ src/core/ngx_resolver.h \ src/core/ngx_open_file_cache.h \ src/core/ngx_crypt.h \ src/core/ngx_proxy_protocol.h \ src/core/ngx_syslog.h" CORE_SRCS="src/core/nginx.c \ src/core/ngx_log.c \ src/core/ngx_palloc.c \ src/core/ngx_array.c \ src/core/ngx_list.c \ src/core/ngx_hash.c \ src/core/ngx_buf.c \ src/core/ngx_queue.c \ src/core/ngx_output_chain.c \ src/core/ngx_string.c \ src/core/ngx_parse.c \ src/core/ngx_parse_time.c \ src/core/ngx_inet.c \ src/core/ngx_file.c \ src/core/ngx_crc32.c \ src/core/ngx_murmurhash.c \ src/core/ngx_md5.c \ src/core/ngx_rbtree.c \ src/core/ngx_radix_tree.c \ src/core/ngx_slab.c \ src/core/ngx_times.c \ src/core/ngx_shmtx.c \ src/core/ngx_connection.c \ src/core/ngx_cycle.c \ src/core/ngx_spinlock.c \ src/core/ngx_rwlock.c \ src/core/ngx_cpuinfo.c \ src/core/ngx_conf_file.c \ src/core/ngx_module.c \ src/core/ngx_resolver.c \ src/core/ngx_open_file_cache.c \ src/core/ngx_crypt.c \ src/core/ngx_proxy_protocol.c \ src/core/ngx_syslog.c" EVENT_MODULES="ngx_events_module ngx_event_core_module" EVENT_INCS="src/event src/event/modules" EVENT_DEPS="src/event/ngx_event.h \ src/event/ngx_event_timer.h \ src/event/ngx_event_posted.h \ src/event/ngx_event_connect.h \ src/event/ngx_event_pipe.h" EVENT_SRCS="src/event/ngx_event.c \ src/event/ngx_event_timer.c \ src/event/ngx_event_posted.c \ src/event/ngx_event_accept.c \ src/event/ngx_event_connect.c \ src/event/ngx_event_pipe.c" SELECT_MODULE=ngx_select_module SELECT_SRCS=src/event/modules/ngx_select_module.c WIN32_SELECT_SRCS=src/event/modules/ngx_win32_select_module.c POLL_MODULE=ngx_poll_module POLL_SRCS=src/event/modules/ngx_poll_module.c KQUEUE_MODULE=ngx_kqueue_module KQUEUE_SRCS=src/event/modules/ngx_kqueue_module.c DEVPOLL_MODULE=ngx_devpoll_module DEVPOLL_SRCS=src/event/modules/ngx_devpoll_module.c EVENTPORT_MODULE=ngx_eventport_module EVENTPORT_SRCS=src/event/modules/ngx_eventport_module.c EPOLL_MODULE=ngx_epoll_module EPOLL_SRCS=src/event/modules/ngx_epoll_module.c IOCP_MODULE=ngx_iocp_module IOCP_SRCS=src/event/modules/ngx_iocp_module.c FILE_AIO_SRCS="src/os/unix/ngx_file_aio_read.c" LINUX_AIO_SRCS="src/os/unix/ngx_linux_aio_read.c" UNIX_INCS="$CORE_INCS $EVENT_INCS src/os/unix" UNIX_DEPS="$CORE_DEPS $EVENT_DEPS \ src/os/unix/ngx_time.h \ src/os/unix/ngx_errno.h \ src/os/unix/ngx_alloc.h \ src/os/unix/ngx_files.h \ src/os/unix/ngx_channel.h \ src/os/unix/ngx_shmem.h \ src/os/unix/ngx_process.h \ src/os/unix/ngx_setaffinity.h \ src/os/unix/ngx_setproctitle.h \ src/os/unix/ngx_atomic.h \ src/os/unix/ngx_gcc_atomic_x86.h \ src/os/unix/ngx_thread.h \ src/os/unix/ngx_socket.h \ src/os/unix/ngx_os.h \ src/os/unix/ngx_user.h \ src/os/unix/ngx_dlopen.h \ src/os/unix/ngx_process_cycle.h" # add to UNIX_DEPS # src/os/unix/ngx_gcc_atomic_amd64.h \ # src/os/unix/ngx_gcc_atomic_sparc64.h \ # src/os/unix/ngx_gcc_atomic_ppc.h \ # src/os/unix/ngx_sunpro_atomic_sparc64.h \ # src/os/unix/ngx_sunpro_x86.il \ # src/os/unix/ngx_sunpro_amd64.il \ # src/os/unix/ngx_sunpro_sparc64.il \ UNIX_SRCS="$CORE_SRCS $EVENT_SRCS \ src/os/unix/ngx_time.c \ src/os/unix/ngx_errno.c \ src/os/unix/ngx_alloc.c \ src/os/unix/ngx_files.c \ src/os/unix/ngx_socket.c \ src/os/unix/ngx_recv.c \ src/os/unix/ngx_readv_chain.c \ src/os/unix/ngx_udp_recv.c \ src/os/unix/ngx_send.c \ src/os/unix/ngx_writev_chain.c \ src/os/unix/ngx_udp_send.c \ src/os/unix/ngx_channel.c \ src/os/unix/ngx_shmem.c \ src/os/unix/ngx_process.c \ src/os/unix/ngx_daemon.c \ src/os/unix/ngx_setaffinity.c \ src/os/unix/ngx_setproctitle.c \ src/os/unix/ngx_posix_init.c \ src/os/unix/ngx_user.c \ src/os/unix/ngx_dlopen.c \ src/os/unix/ngx_process_cycle.c" POSIX_DEPS=src/os/unix/ngx_posix_config.h THREAD_POOL_MODULE=ngx_thread_pool_module THREAD_POOL_DEPS=src/core/ngx_thread_pool.h THREAD_POOL_SRCS="src/core/ngx_thread_pool.c src/os/unix/ngx_thread_cond.c src/os/unix/ngx_thread_mutex.c src/os/unix/ngx_thread_id.c" FREEBSD_DEPS="src/os/unix/ngx_freebsd_config.h src/os/unix/ngx_freebsd.h" FREEBSD_SRCS=src/os/unix/ngx_freebsd_init.c FREEBSD_SENDFILE_SRCS=src/os/unix/ngx_freebsd_sendfile_chain.c LINUX_DEPS="src/os/unix/ngx_linux_config.h src/os/unix/ngx_linux.h" LINUX_SRCS=src/os/unix/ngx_linux_init.c LINUX_SENDFILE_SRCS=src/os/unix/ngx_linux_sendfile_chain.c SOLARIS_DEPS="src/os/unix/ngx_solaris_config.h src/os/unix/ngx_solaris.h" SOLARIS_SRCS=src/os/unix/ngx_solaris_init.c SOLARIS_SENDFILEV_SRCS=src/os/unix/ngx_solaris_sendfilev_chain.c DARWIN_DEPS="src/os/unix/ngx_darwin_config.h src/os/unix/ngx_darwin.h" DARWIN_SRCS=src/os/unix/ngx_darwin_init.c DARWIN_SENDFILE_SRCS=src/os/unix/ngx_darwin_sendfile_chain.c WIN32_INCS="$CORE_INCS $EVENT_INCS src/os/win32" WIN32_DEPS="$CORE_DEPS $EVENT_DEPS \ src/os/win32/ngx_win32_config.h \ src/os/win32/ngx_time.h \ src/os/win32/ngx_errno.h \ src/os/win32/ngx_alloc.h \ src/os/win32/ngx_files.h \ src/os/win32/ngx_shmem.h \ src/os/win32/ngx_process.h \ src/os/win32/ngx_atomic.h \ src/os/win32/ngx_thread.h \ src/os/win32/ngx_socket.h \ src/os/win32/ngx_os.h \ src/os/win32/ngx_user.h \ src/os/win32/ngx_dlopen.h \ src/os/win32/ngx_process_cycle.h" WIN32_CONFIG=src/os/win32/ngx_win32_config.h WIN32_SRCS="$CORE_SRCS $EVENT_SRCS \ src/os/win32/ngx_errno.c \ src/os/win32/ngx_alloc.c \ src/os/win32/ngx_files.c \ src/os/win32/ngx_shmem.c \ src/os/win32/ngx_time.c \ src/os/win32/ngx_process.c \ src/os/win32/ngx_thread.c \ src/os/win32/ngx_socket.c \ src/os/win32/ngx_wsarecv.c \ src/os/win32/ngx_wsarecv_chain.c \ src/os/win32/ngx_udp_wsarecv.c \ src/os/win32/ngx_wsasend.c \ src/os/win32/ngx_wsasend_chain.c \ src/os/win32/ngx_win32_init.c \ src/os/win32/ngx_user.c \ src/os/win32/ngx_dlopen.c \ src/os/win32/ngx_event_log.c \ src/os/win32/ngx_process_cycle.c \ src/event/ngx_event_acceptex.c" NGX_WIN32_ICONS="src/os/win32/nginx.ico" NGX_WIN32_RC="src/os/win32/nginx.rc" HTTP_FILE_CACHE_SRCS=src/http/ngx_http_file_cache.c