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ngx_http_dyups_module.c
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#include <ngx_http.h>
#include <ngx_http_dyups.h>
#ifdef NGX_DYUPS_LUA
#include <ngx_http_dyups_lua.h>
#endif
#define NGX_DYUPS_DELETING 1
#define NGX_DYUPS_DELETED 2
#define NGX_DYUPS_SHM_NAME_LEN 256
#define NGX_DYUPS_DELETE 1
#define NGX_DYUPS_ADD 2
#define ngx_dyups_add_timer(ev, timeout) \
if (!ngx_exiting && !ngx_quit) ngx_add_timer(ev, (timeout))
typedef struct {
ngx_uint_t idx;
ngx_uint_t *ref;
ngx_uint_t deleted;
ngx_flag_t dynamic;
ngx_pool_t *pool;
ngx_http_conf_ctx_t *ctx;
ngx_http_upstream_srv_conf_t *upstream;
} ngx_http_dyups_srv_conf_t;
typedef struct {
ngx_flag_t enable;
ngx_flag_t trylock;
ngx_array_t dy_upstreams;/* ngx_http_dyups_srv_conf_t */
ngx_str_t shm_name;
ngx_uint_t shm_size;
ngx_msec_t read_msg_timeout;
ngx_flag_t read_msg_log;
} ngx_http_dyups_main_conf_t;
typedef struct {
ngx_uint_t ref;
ngx_http_upstream_init_peer_pt init;
} ngx_http_dyups_upstream_srv_conf_t;
typedef struct {
void *data;
ngx_http_dyups_upstream_srv_conf_t *scf;
ngx_event_get_peer_pt get;
ngx_event_free_peer_pt free;
#if (NGX_HTTP_SSL)
ngx_ssl_session_t *ssl_session;
#endif
} ngx_http_dyups_ctx_t;
typedef struct ngx_dyups_status_s {
ngx_pid_t pid;
ngx_msec_t time;
} ngx_dyups_status_t;
typedef struct ngx_dyups_shctx_s {
ngx_queue_t msg_queue;
ngx_uint_t version;
ngx_dyups_status_t *status;
} ngx_dyups_shctx_t;
typedef struct ngx_dyups_global_ctx_s {
ngx_event_t msg_timer;
ngx_slab_pool_t *shpool;
ngx_dyups_shctx_t *sh;
} ngx_dyups_global_ctx_t;
typedef struct ngx_dyups_msg_s {
ngx_queue_t queue;
ngx_str_t name;
ngx_str_t content;
ngx_int_t count;
ngx_uint_t flag;
ngx_pid_t *pid;
} ngx_dyups_msg_t;
static ngx_int_t ngx_http_dyups_pre_conf(ngx_conf_t *cf);
static ngx_int_t ngx_http_dyups_init(ngx_conf_t *cf);
static void *ngx_http_dyups_create_main_conf(ngx_conf_t *cf);
static char *ngx_http_dyups_init_main_conf(ngx_conf_t *cf, void *conf);
static char *ngx_http_dyups_cmd_deprecated(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_http_dyups_interface(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_int_t ngx_http_dyups_interface_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_dyups_interface_read_body(ngx_http_request_t *r);
static ngx_buf_t *ngx_http_dyups_read_body(ngx_http_request_t *r);
static ngx_buf_t *ngx_http_dyups_read_body_from_file(ngx_http_request_t *r);
static void ngx_http_dyups_body_handler(ngx_http_request_t *r);
static void ngx_http_dyups_send_response(ngx_http_request_t *r,
ngx_int_t status, ngx_str_t *content);
static ngx_int_t ngx_http_dyups_do_get(ngx_http_request_t *r,
ngx_array_t *resource);
static ngx_int_t ngx_http_dyups_do_delete(ngx_http_request_t *r,
ngx_array_t *resource);
static ngx_http_dyups_srv_conf_t *ngx_dyups_find_upstream(ngx_str_t *name,
ngx_int_t *idx);
static ngx_int_t ngx_dyups_add_server(ngx_http_dyups_srv_conf_t *duscf,
ngx_buf_t *buf);
static ngx_int_t ngx_dyups_init_upstream(ngx_http_dyups_srv_conf_t *duscf,
ngx_str_t *name, ngx_uint_t index);
static void ngx_dyups_mark_upstream_delete(ngx_http_dyups_srv_conf_t *duscf);
static ngx_int_t ngx_http_dyups_init_peer(ngx_http_request_t *r,
ngx_http_upstream_srv_conf_t *us);
static ngx_int_t ngx_http_dyups_get_peer(ngx_peer_connection_t *pc, void *data);
static void ngx_http_dyups_free_peer(ngx_peer_connection_t *pc, void *data,
ngx_uint_t state);
static void *ngx_http_dyups_create_srv_conf(ngx_conf_t *cf);
static ngx_buf_t *ngx_http_dyups_show_list(ngx_http_request_t *r);
static ngx_buf_t *ngx_http_dyups_show_detail(ngx_http_request_t *r);
static ngx_buf_t *ngx_http_dyups_show_upstream(ngx_http_request_t *r,
ngx_http_dyups_srv_conf_t *duscf);
static ngx_int_t ngx_http_dyups_init_shm_zone(ngx_shm_zone_t *shm_zone,
void *data);
static char *ngx_http_dyups_init_shm(ngx_conf_t *cf, void *conf);
static ngx_int_t ngx_http_dyups_get_shm_name(ngx_str_t *shm_name,
ngx_pool_t *pool, ngx_uint_t generation);
static ngx_int_t ngx_http_dyups_init_process(ngx_cycle_t *cycle);
static void ngx_http_dyups_exit_process(ngx_cycle_t *cycle);
static void ngx_http_dyups_read_msg(ngx_event_t *ev);
static void ngx_http_dyups_read_msg_locked(ngx_event_t *ev);
static ngx_int_t ngx_http_dyups_send_msg(ngx_str_t *name, ngx_buf_t *body,
ngx_uint_t flag);
static void ngx_dyups_destroy_msg(ngx_slab_pool_t *shpool,
ngx_dyups_msg_t *msg);
static ngx_int_t ngx_dyups_sync_cmd(ngx_pool_t *pool, ngx_str_t *name,
ngx_str_t *content, ngx_uint_t flag);
static ngx_array_t *ngx_dyups_parse_path(ngx_pool_t *pool, ngx_str_t *path);
static ngx_int_t ngx_dyups_do_delete(ngx_str_t *name, ngx_str_t *rv);
static ngx_int_t ngx_dyups_do_update(ngx_str_t *name, ngx_buf_t *buf,
ngx_str_t *rv);
static ngx_int_t ngx_dyups_sandbox_update(ngx_buf_t *buf, ngx_str_t *rv);
static ngx_int_t ngx_dyups_restore_upstreams(ngx_cycle_t *cycle);
static void ngx_dyups_purge_msg(ngx_pid_t opid, ngx_pid_t npid);
static void ngx_http_dyups_clean_request(void *data);
#if (NGX_HTTP_SSL)
static ngx_int_t ngx_http_dyups_set_peer_session(ngx_peer_connection_t *pc,
void *data);
static void ngx_http_dyups_save_peer_session(ngx_peer_connection_t *pc,
void *data);
#endif
static ngx_int_t ngx_dyups_add_upstream_filter(
ngx_http_upstream_main_conf_t *umcf, ngx_http_upstream_srv_conf_t *uscf);
static ngx_int_t ngx_dyups_del_upstream_filter(
ngx_http_upstream_main_conf_t *umcf, ngx_http_upstream_srv_conf_t *uscf);
ngx_int_t (*ngx_dyups_add_upstream_top_filter)
(ngx_http_upstream_main_conf_t *umcf, ngx_http_upstream_srv_conf_t *uscf);
ngx_int_t (*ngx_dyups_del_upstream_top_filter)
(ngx_http_upstream_main_conf_t *umcf, ngx_http_upstream_srv_conf_t *uscf);
static ngx_command_t ngx_http_dyups_commands[] = {
{ ngx_string("dyups_interface"),
NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
ngx_http_dyups_interface,
0,
0,
NULL },
{ ngx_string("dyups_read_msg_timeout"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_HTTP_MAIN_CONF_OFFSET,
offsetof(ngx_http_dyups_main_conf_t, read_msg_timeout),
NULL },
{ ngx_string("dyups_read_msg_log"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_MAIN_CONF_OFFSET,
offsetof(ngx_http_dyups_main_conf_t, read_msg_log),
NULL },
{ ngx_string("dyups_shm_zone_size"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_MAIN_CONF_OFFSET,
offsetof(ngx_http_dyups_main_conf_t, shm_size),
NULL },
{ ngx_string("dyups_upstream_conf"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_http_dyups_cmd_deprecated,
NGX_HTTP_MAIN_CONF_OFFSET,
0,
NULL },
{ ngx_string("dyups_trylock"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_HTTP_MAIN_CONF_OFFSET,
offsetof(ngx_http_dyups_main_conf_t, trylock),
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_dyups_module_ctx = {
ngx_http_dyups_pre_conf, /* preconfiguration */
ngx_http_dyups_init, /* postconfiguration */
ngx_http_dyups_create_main_conf, /* create main configuration */
ngx_http_dyups_init_main_conf, /* init main configuration */
ngx_http_dyups_create_srv_conf, /* create server configuration */
NULL, /* merge server configuration */
NULL, /* create location configuration */
NULL /* merge location configuration */
};
ngx_module_t ngx_http_dyups_module = {
NGX_MODULE_V1,
&ngx_http_dyups_module_ctx, /* module context */
ngx_http_dyups_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
ngx_http_dyups_init_process, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
ngx_http_dyups_exit_process, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
ngx_flag_t ngx_http_dyups_api_enable = 0;
static ngx_http_upstream_srv_conf_t ngx_http_dyups_deleted_upstream;
static ngx_uint_t ngx_http_dyups_shm_generation = 0;
static ngx_dyups_global_ctx_t ngx_dyups_global_ctx;
static ngx_int_t
ngx_http_dyups_pre_conf(ngx_conf_t *cf)
{
ngx_dyups_add_upstream_top_filter = ngx_dyups_add_upstream_filter;
ngx_dyups_del_upstream_top_filter = ngx_dyups_del_upstream_filter;
return NGX_OK;
}
static char *
ngx_http_dyups_interface(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_core_loc_conf_t *clcf;
ngx_http_dyups_main_conf_t *dmcf;
dmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_dyups_module);
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
clcf->handler = ngx_http_dyups_interface_handler;
dmcf->enable = 1;
return NGX_CONF_OK;
}
static void *
ngx_http_dyups_create_main_conf(ngx_conf_t *cf)
{
ngx_http_dyups_main_conf_t *dmcf;
dmcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dyups_main_conf_t));
if (dmcf == NULL) {
return NULL;
}
#if (NGX_DEBUG)
if (ngx_array_init(&dmcf->dy_upstreams, cf->pool, 1,
sizeof(ngx_http_dyups_srv_conf_t))
!= NGX_OK)
{
return NULL;
}
#else
if (ngx_array_init(&dmcf->dy_upstreams, cf->pool, 1024,
sizeof(ngx_http_dyups_srv_conf_t))
!= NGX_OK)
{
return NULL;
}
#endif
dmcf->enable = NGX_CONF_UNSET;
dmcf->shm_size = NGX_CONF_UNSET_UINT;
dmcf->read_msg_timeout = NGX_CONF_UNSET_MSEC;
dmcf->read_msg_log = NGX_CONF_UNSET;
dmcf->trylock = NGX_CONF_UNSET;
return dmcf;
}
static char *
ngx_http_dyups_init_main_conf(ngx_conf_t *cf, void *conf)
{
ngx_http_dyups_main_conf_t *dmcf = conf;
if (dmcf->enable == NGX_CONF_UNSET) {
dmcf->enable = 0;
}
dmcf->enable = dmcf->enable || ngx_http_dyups_api_enable;
if (dmcf->trylock == NGX_CONF_UNSET) {
dmcf->trylock = 0;
}
if (!dmcf->enable) {
return NGX_CONF_OK;
}
if (dmcf->read_msg_timeout == NGX_CONF_UNSET_MSEC) {
dmcf->read_msg_timeout = 1000;
}
if (dmcf->shm_size == NGX_CONF_UNSET_UINT) {
dmcf->shm_size = 2 * 1024 * 1024;
}
return ngx_http_dyups_init_shm(cf, conf);
}
static char *
ngx_http_dyups_init_shm(ngx_conf_t *cf, void *conf)
{
ngx_http_dyups_main_conf_t *dmcf = conf;
ngx_shm_zone_t *shm_zone;
ngx_http_dyups_shm_generation++;
if (ngx_http_dyups_get_shm_name(&dmcf->shm_name, cf->pool,
ngx_http_dyups_shm_generation)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
shm_zone = ngx_shared_memory_add(cf, &dmcf->shm_name, dmcf->shm_size,
&ngx_http_dyups_module);
if (shm_zone == NULL) {
return NGX_CONF_ERROR;
}
ngx_log_error(NGX_LOG_DEBUG, cf->log, 0,
"[dyups] init shm:%V, size:%ui", &dmcf->shm_name,
dmcf->shm_size);
shm_zone->data = cf->pool;
shm_zone->init = ngx_http_dyups_init_shm_zone;
return NGX_CONF_OK;
}
static ngx_int_t
ngx_http_dyups_get_shm_name(ngx_str_t *shm_name, ngx_pool_t *pool,
ngx_uint_t generation)
{
u_char *last;
shm_name->data = ngx_palloc(pool, NGX_DYUPS_SHM_NAME_LEN);
if (shm_name->data == NULL) {
return NGX_ERROR;
}
last = ngx_snprintf(shm_name->data, NGX_DYUPS_SHM_NAME_LEN, "%s#%ui",
"ngx_http_dyups_module", generation);
shm_name->len = last - shm_name->data;
return NGX_OK;
}
static ngx_int_t
ngx_http_dyups_init_shm_zone(ngx_shm_zone_t *shm_zone, void *data)
{
ngx_slab_pool_t *shpool;
ngx_dyups_shctx_t *sh;
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
sh = ngx_slab_alloc(shpool, sizeof(ngx_dyups_shctx_t));
if (sh == NULL) {
return NGX_ERROR;
}
ngx_dyups_global_ctx.sh = sh;
ngx_dyups_global_ctx.shpool = shpool;
ngx_queue_init(&sh->msg_queue);
sh->version = 0;
sh->status = NULL;
return NGX_OK;
}
static void *
ngx_http_dyups_create_srv_conf(ngx_conf_t *cf)
{
ngx_http_dyups_upstream_srv_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dyups_upstream_srv_conf_t));
if (conf == NULL) {
return NULL;
}
/*
conf->init = NULL;
*/
return conf;
}
static ngx_int_t
ngx_http_dyups_init(ngx_conf_t *cf)
{
ngx_url_t u;
ngx_uint_t i;
ngx_http_dyups_srv_conf_t *duscf;
ngx_http_upstream_server_t *us;
ngx_http_dyups_main_conf_t *dmcf;
ngx_http_upstream_srv_conf_t **uscfp;
ngx_http_upstream_main_conf_t *umcf;
ngx_http_dyups_upstream_srv_conf_t *dscf;
dmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_dyups_module);
umcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_upstream_module);
if (!dmcf->enable) {
return NGX_OK;
}
uscfp = umcf->upstreams.elts;
for (i = 0; i < umcf->upstreams.nelts; i++) {
duscf = ngx_array_push(&dmcf->dy_upstreams);
if (duscf == NULL) {
return NGX_ERROR;
}
ngx_memzero(duscf, sizeof(ngx_http_dyups_srv_conf_t));
duscf->pool = NULL;
duscf->upstream = uscfp[i];
duscf->dynamic = (uscfp[i]->port == 0
&& uscfp[i]->srv_conf && uscfp[i]->servers
&& uscfp[i]->flags & NGX_HTTP_UPSTREAM_CREATE);
duscf->deleted = 0;
duscf->idx = i;
if (duscf->dynamic) {
dscf = duscf->upstream->srv_conf[ngx_http_dyups_module.ctx_index];
duscf->ref = &dscf->ref;
}
}
/* alloc a dummy upstream */
ngx_memzero(&ngx_http_dyups_deleted_upstream,
sizeof(ngx_http_upstream_srv_conf_t));
ngx_http_dyups_deleted_upstream.srv_conf = ((ngx_http_conf_ctx_t *)
(cf->ctx))->srv_conf;
ngx_http_dyups_deleted_upstream.servers = ngx_array_create(cf->pool, 1,
sizeof(ngx_http_upstream_server_t));
us = ngx_array_push(ngx_http_dyups_deleted_upstream.servers);
if (us == NULL) {
return NGX_ERROR;
}
ngx_memzero(&u, sizeof(ngx_url_t));
ngx_memzero(us, sizeof(ngx_http_upstream_server_t));
u.default_port = 80;
ngx_str_set(&u.url, "0.0.0.0");
if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
if (u.err) {
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
"[dyups] %s in init", u.err);
}
return NGX_ERROR;
}
us->addrs = u.addrs;
us->naddrs = u.naddrs;
us->down = 1;
ngx_str_set(&ngx_http_dyups_deleted_upstream.host,
"_dyups_upstream_down_host_");
ngx_http_dyups_deleted_upstream.file_name = (u_char *) "dyups_upstream";
#ifdef NGX_DYUPS_LUA
return ngx_http_dyups_lua_preload(cf);
#else
return NGX_OK;
#endif
}
static ngx_int_t
ngx_http_dyups_init_process(ngx_cycle_t *cycle)
{
ngx_int_t rc, i;
ngx_pid_t pid;
ngx_time_t *tp;
ngx_msec_t now;
ngx_event_t *timer;
ngx_core_conf_t *ccf;
ngx_slab_pool_t *shpool;
ngx_dyups_shctx_t *sh;
ngx_dyups_status_t *status;
ngx_http_dyups_main_conf_t *dmcf;
ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
dmcf = ngx_http_cycle_get_module_main_conf(ngx_cycle,
ngx_http_dyups_module);
if (!dmcf || !dmcf->enable || ngx_process == NGX_PROCESS_HELPER) {
ngx_http_dyups_api_enable = 0;
return NGX_OK;
}
ngx_http_dyups_api_enable = 1;
timer = &ngx_dyups_global_ctx.msg_timer;
ngx_memzero(timer, sizeof(ngx_event_t));
timer->handler = ngx_http_dyups_read_msg;
timer->log = cycle->log;
timer->data = dmcf;
ngx_add_timer(timer, dmcf->read_msg_timeout);
shpool = ngx_dyups_global_ctx.shpool;
sh = ngx_dyups_global_ctx.sh;
ngx_shmtx_lock(&shpool->mutex);
if (sh->status == NULL) {
sh->status = ngx_slab_alloc_locked(shpool,
sizeof(ngx_dyups_status_t) * ccf->worker_processes);
if (sh->status == NULL) {
ngx_shmtx_unlock(&shpool->mutex);
return NGX_ERROR;
}
ngx_memzero(sh->status,
sizeof(ngx_dyups_status_t) * ccf->worker_processes);
ngx_shmtx_unlock(&shpool->mutex);
return NGX_OK;
}
ngx_shmtx_unlock(&shpool->mutex);
if (sh->version != 0) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"[dyups] process start after abnormal exits");
ngx_msleep(dmcf->read_msg_timeout * 2);
ngx_time_update();
tp = ngx_timeofday();
now = (ngx_msec_t) (tp->sec * 1000 + tp->msec);
ngx_shmtx_lock(&shpool->mutex);
if (sh->status == NULL) {
ngx_shmtx_unlock(&shpool->mutex);
return NGX_OK;
}
status = &sh->status[0];
for (i = 1; i < ccf->worker_processes; i++) {
ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
"[dyups] process %P %ui %ui",
sh->status[i].pid, status->time, sh->status[i].time);
if (status->time > sh->status[i].time) {
status = &sh->status[i];
}
}
pid = status->pid;
status->time = now;
status->pid = ngx_pid;
ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
"[dyups] new process is %P, old process is %P",
ngx_pid, pid);
ngx_dyups_purge_msg(pid, ngx_pid);
ngx_shmtx_unlock(&shpool->mutex);
ngx_shmtx_lock(&shpool->mutex);
rc = ngx_dyups_restore_upstreams(cycle);
ngx_shmtx_unlock(&shpool->mutex);
if (rc != NGX_OK) {
ngx_log_error(NGX_LOG_CRIT, cycle->log, 0,
"[dyups] process restore upstream failed");
}
}
return NGX_OK;
}
static void
ngx_dyups_purge_msg(ngx_pid_t opid, ngx_pid_t npid)
{
ngx_int_t i;
ngx_queue_t *q;
ngx_dyups_msg_t *msg;
ngx_dyups_shctx_t *sh;
sh = ngx_dyups_global_ctx.sh;
for (q = ngx_queue_last(&sh->msg_queue);
q != ngx_queue_sentinel(&sh->msg_queue);
q = ngx_queue_prev(q))
{
msg = ngx_queue_data(q, ngx_dyups_msg_t, queue);
for (i = 0; i < msg->count; i++) {
if (msg->pid[i] == opid) {
ngx_log_error(NGX_LOG_INFO, ngx_cycle->log, 0,
"[dyups] restore one pid conflict"
" old: %P, new: %P", opid, npid);
msg->pid[i] = npid;
}
}
}
}
static void
ngx_http_dyups_exit_process(ngx_cycle_t *cycle)
{
ngx_uint_t i;
ngx_http_dyups_srv_conf_t *duscfs, *duscf;
ngx_http_dyups_main_conf_t *dumcf;
dumcf = ngx_http_cycle_get_module_main_conf(ngx_cycle,
ngx_http_dyups_module);
if (!dumcf) {
return;
}
duscfs = dumcf->dy_upstreams.elts;
for (i = 0; i < dumcf->dy_upstreams.nelts; i++) {
duscf = &duscfs[i];
if (duscf->pool) {
ngx_destroy_pool(duscf->pool);
duscf->pool = NULL;
}
}
}
static ngx_int_t
ngx_http_dyups_interface_handler(ngx_http_request_t *r)
{
ngx_array_t *res;
ngx_event_t *timer;
timer = &ngx_dyups_global_ctx.msg_timer;
res = ngx_dyups_parse_path(r->pool, &r->uri);
if (res == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (r->method == NGX_HTTP_GET) {
ngx_http_dyups_read_msg(timer);
return ngx_http_dyups_do_get(r, res);
}
if (r->method == NGX_HTTP_DELETE) {
return ngx_http_dyups_do_delete(r, res);
}
return ngx_http_dyups_interface_read_body(r);
}
ngx_int_t
ngx_dyups_delete_upstream(ngx_str_t *name, ngx_str_t *rv)
{
ngx_int_t status, rc;
ngx_event_t *timer;
ngx_slab_pool_t *shpool;
ngx_http_dyups_main_conf_t *dmcf;
dmcf = ngx_http_cycle_get_module_main_conf(ngx_cycle,
ngx_http_dyups_module);
timer = &ngx_dyups_global_ctx.msg_timer;
shpool = ngx_dyups_global_ctx.shpool;
if (!ngx_http_dyups_api_enable) {
ngx_str_set(rv, "API disabled\n");
return NGX_HTTP_NOT_ALLOWED;
}
if (!dmcf->trylock) {
ngx_shmtx_lock(&shpool->mutex);
} else {
if (!ngx_shmtx_trylock(&shpool->mutex)) {
return NGX_HTTP_CONFLICT;
}
}
ngx_http_dyups_read_msg_locked(timer);
status = ngx_dyups_do_delete(name, rv);
if (status != NGX_HTTP_OK) {
goto finish;
}
rc = ngx_http_dyups_send_msg(name, NULL, NGX_DYUPS_DELETE);
if (rc != NGX_OK) {
ngx_str_set(rv, "alert: delte success but not sync to other process");
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, "[dyups] %V", &rv);
status = NGX_HTTP_INTERNAL_SERVER_ERROR;
}
finish:
ngx_shmtx_unlock(&shpool->mutex);
return status;
}
static ngx_int_t
ngx_http_dyups_do_get(ngx_http_request_t *r, ngx_array_t *resource)
{
ngx_int_t rc, status, dumy;
ngx_buf_t *buf;
ngx_str_t *value;
ngx_chain_t out;
ngx_http_dyups_srv_conf_t *duscf;
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
if (resource->nelts == 0) {
return NGX_HTTP_NOT_FOUND;
}
buf = NULL;
value = resource->elts;
if (value[0].len == 4
&& ngx_strncasecmp(value[0].data, (u_char *) "list", 4) == 0)
{
buf = ngx_http_dyups_show_list(r);
if (buf == NULL) {
status = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto finish;
}
}
if (value[0].len == 6
&& ngx_strncasecmp(value[0].data, (u_char *) "detail", 6) == 0)
{
buf = ngx_http_dyups_show_detail(r);
if (buf == NULL) {
status = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto finish;
}
}
if (value[0].len == 8
&& ngx_strncasecmp(value[0].data, (u_char *) "upstream", 8) == 0)
{
if (resource->nelts != 2) {
status = NGX_HTTP_NOT_FOUND;
goto finish;
}
duscf = ngx_dyups_find_upstream(&value[1], &dumy);
if (duscf == NULL || duscf->deleted) {
status = NGX_HTTP_NOT_FOUND;
goto finish;
}
buf = ngx_http_dyups_show_upstream(r, duscf);
if (buf == NULL) {
status = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto finish;
}
}
if (buf != NULL && ngx_buf_size(buf) == 0) {
status = NGX_HTTP_NO_CONTENT;
} else {
status = buf ? NGX_HTTP_OK : NGX_HTTP_NOT_FOUND;
}
finish:
r->headers_out.status = status;
if (status != NGX_HTTP_OK) {
r->headers_out.content_length_n = 0;
} else {
r->headers_out.content_length_n = ngx_buf_size(buf);
}
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK) {
return rc;
}
if (status != NGX_HTTP_OK) {
return ngx_http_send_special(r, NGX_HTTP_FLUSH);
}
buf->last_buf = 1;
out.buf = buf;
out.next = NULL;
return ngx_http_output_filter(r, &out);
}
static ngx_buf_t *
ngx_http_dyups_show_list(ngx_http_request_t *r)
{
ngx_uint_t i, len;
ngx_str_t host;
ngx_buf_t *buf;
ngx_http_dyups_srv_conf_t *duscfs, *duscf;
ngx_http_dyups_main_conf_t *dumcf;
dumcf = ngx_http_get_module_main_conf(r, ngx_http_dyups_module);
len = 0;
duscfs = dumcf->dy_upstreams.elts;
for (i = 0; i < dumcf->dy_upstreams.nelts; i++) {
duscf = &duscfs[i];
if (!duscf->dynamic) {
continue;
}
if (duscf->deleted) {
continue;
}
len += duscf->upstream->host.len + 1;
}
buf = ngx_create_temp_buf(r->pool, len);
if (buf == NULL) {
return NULL;
}
for (i = 0; i < dumcf->dy_upstreams.nelts; i++) {
duscf = &duscfs[i];
if (!duscf->dynamic) {
continue;
}
if (duscf->deleted) {
continue;
}
host = duscf->upstream->host;
buf->last = ngx_sprintf(buf->last, "%V\n", &host);
}
return buf;
}
static ngx_buf_t *
ngx_http_dyups_show_detail(ngx_http_request_t *r)
{
ngx_uint_t i, j, len;
ngx_str_t host;
ngx_buf_t *buf;
ngx_http_dyups_srv_conf_t *duscfs, *duscf;
ngx_http_dyups_main_conf_t *dumcf;
ngx_http_upstream_server_t *us;
dumcf = ngx_http_get_module_main_conf(r, ngx_http_dyups_module);
len = 0;
duscfs = dumcf->dy_upstreams.elts;
for (i = 0; i < dumcf->dy_upstreams.nelts; i++) {
duscf = &duscfs[i];
if (!duscf->dynamic) {
continue;
}
if (duscf->deleted) {
continue;
}
len += duscf->upstream->host.len + 1;
for (j = 0; j < duscf->upstream->servers->nelts; j++) {
len += sizeof("server ") + 256;
}
}
buf = ngx_create_temp_buf(r->pool, len);
if (buf == NULL) {
return NULL;
}
for (i = 0; i < dumcf->dy_upstreams.nelts; i++) {
duscf = &duscfs[i];
if (!duscf->dynamic) {
continue;
}
if (duscf->deleted) {
continue;
}
host = duscf->upstream->host;
buf->last = ngx_sprintf(buf->last, "%V\n", &host);
us = duscf->upstream->servers->elts;
for (j = 0; j < duscf->upstream->servers->nelts; j++) {
buf->last = ngx_sprintf(buf->last, "server %V weight=%i max_fails=%i "
"fail_timeout=%T backup=%d down=%d\n",
&us[j].addrs->name,
us[j].weight,
us[j].max_fails,
us[j].fail_timeout,
us[j].backup,
us[j].down);
}
buf->last = ngx_sprintf(buf->last, "\n");
}
return buf;
}