Mercurial > hg > nginx-quic
view src/os/unix/ngx_errno.h @ 6428:545b5e4d83b2
Upstream: avoid closing client connection in edge case.
If proxy_cache is enabled, and proxy_no_cache tests true, it was previously
possible for the client connection to be closed after a 304. The fix is to
recheck r->header_only after the final cacheability is determined, and end the
request if no longer cacheable.
Example configuration:
proxy_cache foo;
proxy_cache_bypass 1;
proxy_no_cache 1;
If a client sends If-None-Match, and the upstream server returns 200 with a
matching ETag, no body should be returned to the client. At the start of
ngx_http_upstream_send_response proxy_no_cache is not yet tested, thus cacheable
is still 1 and downstream_error is set.
However, by the time the downstream_error check is done in process_request,
proxy_no_cache has been tested and cacheable is set to 0. The client connection
is then closed, regardless of keepalive.
author | Justin Li <jli.justinli@gmail.com> |
---|---|
date | Tue, 08 Mar 2016 22:31:55 -0500 |
parents | 3c5ddf0575d8 |
children | a5897d360977 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_ERRNO_H_INCLUDED_ #define _NGX_ERRNO_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> typedef int ngx_err_t; #define NGX_EPERM EPERM #define NGX_ENOENT ENOENT #define NGX_ENOPATH ENOENT #define NGX_ESRCH ESRCH #define NGX_EINTR EINTR #define NGX_ECHILD ECHILD #define NGX_ENOMEM ENOMEM #define NGX_EACCES EACCES #define NGX_EBUSY EBUSY #define NGX_EEXIST EEXIST #define NGX_EXDEV EXDEV #define NGX_ENOTDIR ENOTDIR #define NGX_EISDIR EISDIR #define NGX_EINVAL EINVAL #define NGX_ENFILE ENFILE #define NGX_EMFILE EMFILE #define NGX_ENOSPC ENOSPC #define NGX_EPIPE EPIPE #define NGX_EINPROGRESS EINPROGRESS #define NGX_ENOPROTOOPT ENOPROTOOPT #define NGX_EOPNOTSUPP EOPNOTSUPP #define NGX_EADDRINUSE EADDRINUSE #define NGX_ECONNABORTED ECONNABORTED #define NGX_ECONNRESET ECONNRESET #define NGX_ENOTCONN ENOTCONN #define NGX_ETIMEDOUT ETIMEDOUT #define NGX_ECONNREFUSED ECONNREFUSED #define NGX_ENAMETOOLONG ENAMETOOLONG #define NGX_ENETDOWN ENETDOWN #define NGX_ENETUNREACH ENETUNREACH #define NGX_EHOSTDOWN EHOSTDOWN #define NGX_EHOSTUNREACH EHOSTUNREACH #define NGX_ENOSYS ENOSYS #define NGX_ECANCELED ECANCELED #define NGX_EILSEQ EILSEQ #define NGX_ENOMOREFILES 0 #define NGX_ELOOP ELOOP #define NGX_EBADF EBADF #if (NGX_HAVE_OPENAT) #define NGX_EMLINK EMLINK #endif #if (__hpux__) #define NGX_EAGAIN EWOULDBLOCK #else #define NGX_EAGAIN EAGAIN #endif #define ngx_errno errno #define ngx_socket_errno errno #define ngx_set_errno(err) errno = err #define ngx_set_socket_errno(err) errno = err u_char *ngx_strerror(ngx_err_t err, u_char *errstr, size_t size); ngx_int_t ngx_strerror_init(void); #endif /* _NGX_ERRNO_H_INCLUDED_ */