Mercurial > hg > nginx-quic
view src/os/win32/ngx_thread.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 | 2942a827da09 |
children | 94ce52db3367 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> ngx_int_t ngx_threads_n; static size_t stack_size; ngx_err_t ngx_create_thread(ngx_tid_t *tid, ngx_thread_value_t (__stdcall *func)(void *arg), void *arg, ngx_log_t *log) { u_long id; ngx_err_t err; *tid = CreateThread(NULL, stack_size, func, arg, 0, &id); if (*tid != NULL) { ngx_log_error(NGX_LOG_NOTICE, log, 0, "create thread " NGX_TID_T_FMT, id); return 0; } err = ngx_errno; ngx_log_error(NGX_LOG_ALERT, log, err, "CreateThread() failed"); return err; } ngx_int_t ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle) { stack_size = size; return NGX_OK; } ngx_err_t ngx_thread_key_create(ngx_tls_key_t *key) { *key = TlsAlloc(); if (*key == TLS_OUT_OF_INDEXES) { return ngx_errno; } return 0; } ngx_err_t ngx_thread_set_tls(ngx_tls_key_t *key, void *data) { if (TlsSetValue(*key, data) == 0) { return ngx_errno; } return 0; } ngx_mutex_t * ngx_mutex_init(ngx_log_t *log, ngx_uint_t flags) { ngx_mutex_t *m; m = ngx_alloc(sizeof(ngx_mutex_t), log); if (m == NULL) { return NULL; } m->log = log; /* STUB */ return m; } /* STUB */ void ngx_mutex_lock(ngx_mutex_t *m) { return; } ngx_int_t ngx_mutex_trylock(ngx_mutex_t *m) { return NGX_OK; } void ngx_mutex_unlock(ngx_mutex_t *m) { return; } /**/