Mercurial > hg > nginx-quic
view src/os/win32/ngx_win32_init.c @ 5992:174512857ccf
Cache: do not inherit last_modified and etag from stale response.
When replacing a stale cache entry, its last_modified and etag could be
inherited from the old entry if the response code is not 200 or 206. Moreover,
etag could be inherited with any response code if it's missing in the new
response. As a result, the cache entry is left with invalid last_modified or
etag which could lead to broken revalidation.
For example, when a file is deleted from backend, its last_modified is copied to
the new 404 cache entry and is used later for revalidation. Once the old file
appears again with its original timestamp, revalidation succeeds and the cached
404 response is sent to client instead of the file.
The problem appeared with etags in 44b9ab7752e3 (1.7.3) and affected
last_modified in 1573fc7875fa (1.7.9).
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 02 Mar 2015 19:47:13 +0300 |
parents | 1209b8a7b077 |
children | af7eba90645d |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <nginx.h> ngx_uint_t ngx_win32_version; ngx_uint_t ngx_ncpu; ngx_uint_t ngx_max_wsabufs; ngx_int_t ngx_max_sockets; ngx_uint_t ngx_inherited_nonblocking = 1; ngx_uint_t ngx_tcp_nodelay_and_tcp_nopush; char ngx_unique[NGX_INT32_LEN + 1]; ngx_os_io_t ngx_os_io = { ngx_wsarecv, ngx_wsarecv_chain, ngx_udp_wsarecv, ngx_wsasend, ngx_wsasend_chain, 0 }; typedef struct { WORD wServicePackMinor; WORD wSuiteMask; BYTE wProductType; } ngx_osviex_stub_t; static u_int osviex; static OSVERSIONINFOEX osvi; /* Should these pointers be per protocol ? */ LPFN_ACCEPTEX ngx_acceptex; LPFN_GETACCEPTEXSOCKADDRS ngx_getacceptexsockaddrs; LPFN_TRANSMITFILE ngx_transmitfile; LPFN_TRANSMITPACKETS ngx_transmitpackets; LPFN_CONNECTEX ngx_connectex; LPFN_DISCONNECTEX ngx_disconnectex; static GUID ax_guid = WSAID_ACCEPTEX; static GUID as_guid = WSAID_GETACCEPTEXSOCKADDRS; static GUID tf_guid = WSAID_TRANSMITFILE; static GUID tp_guid = WSAID_TRANSMITPACKETS; static GUID cx_guid = WSAID_CONNECTEX; static GUID dx_guid = WSAID_DISCONNECTEX; ngx_int_t ngx_os_init(ngx_log_t *log) { DWORD bytes; SOCKET s; WSADATA wsd; ngx_err_t err; ngx_uint_t n; SYSTEM_INFO si; /* get Windows version */ ngx_memzero(&osvi, sizeof(OSVERSIONINFOEX)); osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); #ifdef _MSC_VER #pragma warning(disable:4996) #endif osviex = GetVersionEx((OSVERSIONINFO *) &osvi); if (osviex == 0) { osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); if (GetVersionEx((OSVERSIONINFO *) &osvi) == 0) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "GetVersionEx() failed"); return NGX_ERROR; } } #ifdef _MSC_VER #pragma warning(default:4996) #endif /* * Windows 3.1 Win32s 0xxxxx * * Windows 95 140000 * Windows 98 141000 * Windows ME 149000 * Windows NT 3.51 235100 * Windows NT 4.0 240000 * Windows NT 4.0 SP5 240050 * Windows 2000 250000 * Windows XP 250100 * Windows 2003 250200 * Windows Vista/2008 260000 * * Windows CE x.x 3xxxxx */ ngx_win32_version = osvi.dwPlatformId * 100000 + osvi.dwMajorVersion * 10000 + osvi.dwMinorVersion * 100; if (osviex) { ngx_win32_version += osvi.wServicePackMajor * 10 + osvi.wServicePackMinor; } GetSystemInfo(&si); ngx_pagesize = si.dwPageSize; ngx_ncpu = si.dwNumberOfProcessors; ngx_cacheline_size = NGX_CPU_CACHE_LINE; for (n = ngx_pagesize; n >>= 1; ngx_pagesize_shift++) { /* void */ } /* delete default "C" locale for _wcsicmp() */ setlocale(LC_ALL, ""); /* init Winsock */ if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, "WSAStartup() failed"); return NGX_ERROR; } if (ngx_win32_version < NGX_WIN_NT) { ngx_max_wsabufs = 16; return NGX_OK; } /* STUB: ngx_uint_t max */ ngx_max_wsabufs = 1024 * 1024; /* * get AcceptEx(), GetAcceptExSockAddrs(), TransmitFile(), * TransmitPackets(), ConnectEx(), and DisconnectEx() addresses */ s = ngx_socket(AF_INET, SOCK_STREAM, IPPROTO_IP); if (s == (ngx_socket_t) -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_socket_n " falied"); return NGX_ERROR; } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &ax_guid, sizeof(GUID), &ngx_acceptex, sizeof(LPFN_ACCEPTEX), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_ACCEPTEX) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &as_guid, sizeof(GUID), &ngx_getacceptexsockaddrs, sizeof(LPFN_GETACCEPTEXSOCKADDRS), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_GETACCEPTEXSOCKADDRS) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &tf_guid, sizeof(GUID), &ngx_transmitfile, sizeof(LPFN_TRANSMITFILE), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_TRANSMITFILE) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &tp_guid, sizeof(GUID), &ngx_transmitpackets, sizeof(LPFN_TRANSMITPACKETS), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_TRANSMITPACKETS) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &cx_guid, sizeof(GUID), &ngx_connectex, sizeof(LPFN_CONNECTEX), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_CONNECTEX) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &dx_guid, sizeof(GUID), &ngx_disconnectex, sizeof(LPFN_DISCONNECTEX), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_DISCONNECTEX) failed"); } if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_socket_errno, ngx_close_socket_n " failed"); } if (GetEnvironmentVariable("ngx_unique", ngx_unique, NGX_INT32_LEN + 1) != 0) { ngx_process = NGX_PROCESS_WORKER; } else { err = ngx_errno; if (err != ERROR_ENVVAR_NOT_FOUND) { ngx_log_error(NGX_LOG_EMERG, log, err, "GetEnvironmentVariable(\"ngx_unique\") failed"); return NGX_ERROR; } ngx_sprintf((u_char *) ngx_unique, "%P%Z", ngx_pid); } srand((ngx_pid << 16) ^ (unsigned) ngx_time()); return NGX_OK; } void ngx_os_status(ngx_log_t *log) { ngx_osviex_stub_t *osviex_stub; ngx_log_error(NGX_LOG_NOTICE, log, 0, NGINX_VER_BUILD); if (osviex) { /* * the MSVC 6.0 SP2 defines wSuiteMask and wProductType * as WORD wReserved[2] */ osviex_stub = (ngx_osviex_stub_t *) &osvi.wServicePackMinor; ngx_log_error(NGX_LOG_INFO, log, 0, "OS: %ud build:%ud, \"%s\", suite:%Xd, type:%ud", ngx_win32_version, osvi.dwBuildNumber, osvi.szCSDVersion, osviex_stub->wSuiteMask, osviex_stub->wProductType); } else { if (osvi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) { /* Win9x build */ ngx_log_error(NGX_LOG_INFO, log, 0, "OS: %u build:%ud.%ud.%ud, \"%s\"", ngx_win32_version, osvi.dwBuildNumber >> 24, (osvi.dwBuildNumber >> 16) & 0xff, osvi.dwBuildNumber & 0xffff, osvi.szCSDVersion); } else { /* * VER_PLATFORM_WIN32_NT * * we do not currently support VER_PLATFORM_WIN32_CE * and we do not support VER_PLATFORM_WIN32s at all */ ngx_log_error(NGX_LOG_INFO, log, 0, "OS: %ud build:%ud, \"%s\"", ngx_win32_version, osvi.dwBuildNumber, osvi.szCSDVersion); } } }