Mercurial > hg > nginx
view src/mysql/ngx_http_mysql_test.c @ 4436:311b358658c8 stable-1.0
Merge of r4339, r4340, r4341:
Cache fixes:
*) Obsolete code removed.
The ngx_http_cache() and ngx_http_no_cache_set_slot() functions
were replaced in 0.8.46 and no longer used since then.
*) Handling of cache files with long headers.
There are two possible situations which can lead to this: response
was cached with bigger proxy_buffer_size value (and nginx was
restared since then, i.e. shared memory zone content was lost), or
due to the race in the cache update code (see [1]) we've end up
with fcn->body_start from a different response stored in shared
memory zone.
*) Only complain on long locked entries.
There have been multiple reports of cases where a real locked entry
was removed, resulting in a segmentation fault later in a worker
which locked the entry. It looks like default inactive timeout isn't
enough in real life.
For now just ignore such locked entries, and move them to the top of
the inactive queue to allow processing of other entries.
[1] http://mailman.nginx.org/pipermail/nginx-devel/2011-September/001287.html
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Sun, 05 Feb 2012 13:34:08 +0000 |
parents | f0d596e84634 |
children | d620f497c50f |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_mysql.h> #include <ngx_http.h> typedef struct { ngx_addr_t *peers; ngx_uint_t npeers; } ngx_http_mysql_test_conf_t; static void ngx_http_mysql_auth(ngx_mysql_t *m); static void ngx_http_mysql_done(ngx_mysql_t *m); static void *ngx_http_mysql_test_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_mysql_test(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_command_t ngx_http_mysql_test_commands[] = { { ngx_string("mysql_test"), NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_mysql_test, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_mysql_test_module_ctx = { NULL, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_mysql_test_create_loc_conf, /* create location configuration */ NULL /* merge location configuration */ }; ngx_module_t ngx_http_mysql_test_module = { NGX_MODULE_V1, &ngx_http_mysql_test_module_ctx, /* module context */ ngx_http_mysql_test_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_str_t ngx_mysql_login = ngx_string("root"); static ngx_str_t ngx_mysql_passwd = ngx_string("tp"); static ngx_str_t ngx_mysql_database = ngx_string("mysql"); static ngx_str_t ngx_mysql_command_query = ngx_string("select * from user"); static ngx_int_t ngx_http_mysql_test_handler(ngx_http_request_t *r) { ngx_int_t rc; ngx_mysql_t *m; ngx_http_mysql_test_conf_t *mtcf; mtcf = ngx_http_get_module_loc_conf(r, ngx_http_mysql_test_module); m = ngx_pcalloc(r->pool, sizeof(ngx_mysql_t)); if (m == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } m->pool = r->pool; m->handler = ngx_http_mysql_auth; m->data = r; m->login = &ngx_mysql_login; m->passwd = &ngx_mysql_passwd; m->database = &ngx_mysql_database; /* STUB */ m->peer.sockaddr = mtcf->peers[0].sockaddr; m->peer.socklen = mtcf->peers[0].socklen; m->peer.name = &mtcf->peers[0].name; m->peer.tries = mtcf->npeers; m->peer.get = ngx_event_get_peer; /**/ m->peer.log = r->connection->log; m->peer.log_error = NGX_ERROR_ERR; rc = ngx_mysql_connect(m); if (rc == NGX_OK || rc == NGX_AGAIN) { return NGX_DONE; } return NGX_HTTP_INTERNAL_SERVER_ERROR; } static void ngx_http_mysql_auth(ngx_mysql_t *m) { ngx_http_request_t *r; r = m->data; if (m->state != NGX_OK) { ngx_http_finalize_request(r, NGX_HTTP_NO_CONTENT); return; } m->query.len = NGX_MYSQL_CMDPKT_LEN + ngx_mysql_command_query.len; m->query.data = ngx_pnalloc(r->pool, m->query.len); if (m->query.data == NULL) { ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); return; } ngx_memcpy(m->query.data + NGX_MYSQL_CMDPKT_LEN, ngx_mysql_command_query.data, ngx_mysql_command_query.len); m->handler = ngx_http_mysql_done; ngx_mysql_query(m); } static void ngx_http_mysql_done(ngx_mysql_t *m) { ngx_http_request_t *r; r = m->data; ngx_http_finalize_request(r, NGX_HTTP_NO_CONTENT); } static void * ngx_http_mysql_test_create_loc_conf(ngx_conf_t *cf) { ngx_http_mysql_test_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_mysql_test_conf_t)); if (conf == NULL) { return NGX_CONF_ERROR; } return conf; } static char * ngx_http_mysql_test(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_mysql_test_conf_t *mtcf = conf; ngx_str_t *value; ngx_url_t u; ngx_http_core_loc_conf_t *clcf; clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); clcf->handler = ngx_http_mysql_test_handler; value = cf->args->elts; ngx_memzero(&u, sizeof(ngx_url_t)); u.url = value[1]; u.default_port = 3306; if (ngx_parse_url(cf->pool, &u) != NGX_OK) { if (u.err) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s in upstream \"%V\"", u.err, &u.url); } return NGX_CONF_ERROR; } mtcf->peers = u.addrs; mtcf->npeers = u.naddrs; return NGX_CONF_OK; }