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-rw-r--r--app/nginx/src/http/modules/ngx_http_limit_req_module.c960
1 files changed, 0 insertions, 960 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_limit_req_module.c b/app/nginx/src/http/modules/ngx_http_limit_req_module.c
deleted file mode 100644
index 579b13c..0000000
--- a/app/nginx/src/http/modules/ngx_http_limit_req_module.c
+++ /dev/null
@@ -1,960 +0,0 @@
-
-/*
- * Copyright (C) Igor Sysoev
- * Copyright (C) Nginx, Inc.
- */
-
-
-#include <ngx_config.h>
-#include <ngx_core.h>
-#include <ngx_http.h>
-
-
-typedef struct {
- u_char color;
- u_char dummy;
- u_short len;
- ngx_queue_t queue;
- ngx_msec_t last;
- /* integer value, 1 corresponds to 0.001 r/s */
- ngx_uint_t excess;
- ngx_uint_t count;
- u_char data[1];
-} ngx_http_limit_req_node_t;
-
-
-typedef struct {
- ngx_rbtree_t rbtree;
- ngx_rbtree_node_t sentinel;
- ngx_queue_t queue;
-} ngx_http_limit_req_shctx_t;
-
-
-typedef struct {
- ngx_http_limit_req_shctx_t *sh;
- ngx_slab_pool_t *shpool;
- /* integer value, 1 corresponds to 0.001 r/s */
- ngx_uint_t rate;
- ngx_http_complex_value_t key;
- ngx_http_limit_req_node_t *node;
-} ngx_http_limit_req_ctx_t;
-
-
-typedef struct {
- ngx_shm_zone_t *shm_zone;
- /* integer value, 1 corresponds to 0.001 r/s */
- ngx_uint_t burst;
- ngx_uint_t nodelay; /* unsigned nodelay:1 */
-} ngx_http_limit_req_limit_t;
-
-
-typedef struct {
- ngx_array_t limits;
- ngx_uint_t limit_log_level;
- ngx_uint_t delay_log_level;
- ngx_uint_t status_code;
-} ngx_http_limit_req_conf_t;
-
-
-static void ngx_http_limit_req_delay(ngx_http_request_t *r);
-static ngx_int_t ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit,
- ngx_uint_t hash, ngx_str_t *key, ngx_uint_t *ep, ngx_uint_t account);
-static ngx_msec_t ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits,
- ngx_uint_t n, ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit);
-static void ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx,
- ngx_uint_t n);
-
-static void *ngx_http_limit_req_create_conf(ngx_conf_t *cf);
-static char *ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent,
- void *child);
-static char *ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
-static char *ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
-static ngx_int_t ngx_http_limit_req_init(ngx_conf_t *cf);
-
-
-static ngx_conf_enum_t ngx_http_limit_req_log_levels[] = {
- { ngx_string("info"), NGX_LOG_INFO },
- { ngx_string("notice"), NGX_LOG_NOTICE },
- { ngx_string("warn"), NGX_LOG_WARN },
- { ngx_string("error"), NGX_LOG_ERR },
- { ngx_null_string, 0 }
-};
-
-
-static ngx_conf_num_bounds_t ngx_http_limit_req_status_bounds = {
- ngx_conf_check_num_bounds, 400, 599
-};
-
-
-static ngx_command_t ngx_http_limit_req_commands[] = {
-
- { ngx_string("limit_req_zone"),
- NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3,
- ngx_http_limit_req_zone,
- 0,
- 0,
- NULL },
-
- { ngx_string("limit_req"),
- NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
- ngx_http_limit_req,
- NGX_HTTP_LOC_CONF_OFFSET,
- 0,
- NULL },
-
- { ngx_string("limit_req_log_level"),
- NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_enum_slot,
- NGX_HTTP_LOC_CONF_OFFSET,
- offsetof(ngx_http_limit_req_conf_t, limit_log_level),
- &ngx_http_limit_req_log_levels },
-
- { ngx_string("limit_req_status"),
- NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_num_slot,
- NGX_HTTP_LOC_CONF_OFFSET,
- offsetof(ngx_http_limit_req_conf_t, status_code),
- &ngx_http_limit_req_status_bounds },
-
- ngx_null_command
-};
-
-
-static ngx_http_module_t ngx_http_limit_req_module_ctx = {
- NULL, /* preconfiguration */
- ngx_http_limit_req_init, /* postconfiguration */
-
- NULL, /* create main configuration */
- NULL, /* init main configuration */
-
- NULL, /* create server configuration */
- NULL, /* merge server configuration */
-
- ngx_http_limit_req_create_conf, /* create location configuration */
- ngx_http_limit_req_merge_conf /* merge location configuration */
-};
-
-
-ngx_module_t ngx_http_limit_req_module = {
- NGX_MODULE_V1,
- &ngx_http_limit_req_module_ctx, /* module context */
- ngx_http_limit_req_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_int_t
-ngx_http_limit_req_handler(ngx_http_request_t *r)
-{
- uint32_t hash;
- ngx_str_t key;
- ngx_int_t rc;
- ngx_uint_t n, excess;
- ngx_msec_t delay;
- ngx_http_limit_req_ctx_t *ctx;
- ngx_http_limit_req_conf_t *lrcf;
- ngx_http_limit_req_limit_t *limit, *limits;
-
- if (r->main->limit_req_set) {
- return NGX_DECLINED;
- }
-
- lrcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_req_module);
- limits = lrcf->limits.elts;
-
- excess = 0;
-
- rc = NGX_DECLINED;
-
-#if (NGX_SUPPRESS_WARN)
- limit = NULL;
-#endif
-
- for (n = 0; n < lrcf->limits.nelts; n++) {
-
- limit = &limits[n];
-
- ctx = limit->shm_zone->data;
-
- if (ngx_http_complex_value(r, &ctx->key, &key) != NGX_OK) {
- return NGX_HTTP_INTERNAL_SERVER_ERROR;
- }
-
- if (key.len == 0) {
- continue;
- }
-
- if (key.len > 65535) {
- ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
- "the value of the \"%V\" key "
- "is more than 65535 bytes: \"%V\"",
- &ctx->key.value, &key);
- continue;
- }
-
- hash = ngx_crc32_short(key.data, key.len);
-
- ngx_shmtx_lock(&ctx->shpool->mutex);
-
- rc = ngx_http_limit_req_lookup(limit, hash, &key, &excess,
- (n == lrcf->limits.nelts - 1));
-
- ngx_shmtx_unlock(&ctx->shpool->mutex);
-
- ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "limit_req[%ui]: %i %ui.%03ui",
- n, rc, excess / 1000, excess % 1000);
-
- if (rc != NGX_AGAIN) {
- break;
- }
- }
-
- if (rc == NGX_DECLINED) {
- return NGX_DECLINED;
- }
-
- r->main->limit_req_set = 1;
-
- if (rc == NGX_BUSY || rc == NGX_ERROR) {
-
- if (rc == NGX_BUSY) {
- ngx_log_error(lrcf->limit_log_level, r->connection->log, 0,
- "limiting requests, excess: %ui.%03ui by zone \"%V\"",
- excess / 1000, excess % 1000,
- &limit->shm_zone->shm.name);
- }
-
- while (n--) {
- ctx = limits[n].shm_zone->data;
-
- if (ctx->node == NULL) {
- continue;
- }
-
- ngx_shmtx_lock(&ctx->shpool->mutex);
-
- ctx->node->count--;
-
- ngx_shmtx_unlock(&ctx->shpool->mutex);
-
- ctx->node = NULL;
- }
-
- return lrcf->status_code;
- }
-
- /* rc == NGX_AGAIN || rc == NGX_OK */
-
- if (rc == NGX_AGAIN) {
- excess = 0;
- }
-
- delay = ngx_http_limit_req_account(limits, n, &excess, &limit);
-
- if (!delay) {
- return NGX_DECLINED;
- }
-
- ngx_log_error(lrcf->delay_log_level, r->connection->log, 0,
- "delaying request, excess: %ui.%03ui, by zone \"%V\"",
- excess / 1000, excess % 1000, &limit->shm_zone->shm.name);
-
- if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) {
- return NGX_HTTP_INTERNAL_SERVER_ERROR;
- }
-
- r->read_event_handler = ngx_http_test_reading;
- r->write_event_handler = ngx_http_limit_req_delay;
-
- r->connection->write->delayed = 1;
- ngx_add_timer(r->connection->write, delay);
-
- return NGX_AGAIN;
-}
-
-
-static void
-ngx_http_limit_req_delay(ngx_http_request_t *r)
-{
- ngx_event_t *wev;
-
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "limit_req delay");
-
- wev = r->connection->write;
-
- if (wev->delayed) {
-
- if (ngx_handle_write_event(wev, 0) != NGX_OK) {
- ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
- }
-
- return;
- }
-
- if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) {
- ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
- return;
- }
-
- r->read_event_handler = ngx_http_block_reading;
- r->write_event_handler = ngx_http_core_run_phases;
-
- ngx_http_core_run_phases(r);
-}
-
-
-static void
-ngx_http_limit_req_rbtree_insert_value(ngx_rbtree_node_t *temp,
- ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
-{
- ngx_rbtree_node_t **p;
- ngx_http_limit_req_node_t *lrn, *lrnt;
-
- for ( ;; ) {
-
- if (node->key < temp->key) {
-
- p = &temp->left;
-
- } else if (node->key > temp->key) {
-
- p = &temp->right;
-
- } else { /* node->key == temp->key */
-
- lrn = (ngx_http_limit_req_node_t *) &node->color;
- lrnt = (ngx_http_limit_req_node_t *) &temp->color;
-
- p = (ngx_memn2cmp(lrn->data, lrnt->data, lrn->len, lrnt->len) < 0)
- ? &temp->left : &temp->right;
- }
-
- if (*p == sentinel) {
- break;
- }
-
- temp = *p;
- }
-
- *p = node;
- node->parent = temp;
- node->left = sentinel;
- node->right = sentinel;
- ngx_rbt_red(node);
-}
-
-
-static ngx_int_t
-ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, ngx_uint_t hash,
- ngx_str_t *key, ngx_uint_t *ep, ngx_uint_t account)
-{
- size_t size;
- ngx_int_t rc, excess;
- ngx_msec_t now;
- ngx_msec_int_t ms;
- ngx_rbtree_node_t *node, *sentinel;
- ngx_http_limit_req_ctx_t *ctx;
- ngx_http_limit_req_node_t *lr;
-
- now = ngx_current_msec;
-
- ctx = limit->shm_zone->data;
-
- node = ctx->sh->rbtree.root;
- sentinel = ctx->sh->rbtree.sentinel;
-
- while (node != sentinel) {
-
- if (hash < node->key) {
- node = node->left;
- continue;
- }
-
- if (hash > node->key) {
- node = node->right;
- continue;
- }
-
- /* hash == node->key */
-
- lr = (ngx_http_limit_req_node_t *) &node->color;
-
- rc = ngx_memn2cmp(key->data, lr->data, key->len, (size_t) lr->len);
-
- if (rc == 0) {
- ngx_queue_remove(&lr->queue);
- ngx_queue_insert_head(&ctx->sh->queue, &lr->queue);
-
- ms = (ngx_msec_int_t) (now - lr->last);
-
- excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000;
-
- if (excess < 0) {
- excess = 0;
- }
-
- *ep = excess;
-
- if ((ngx_uint_t) excess > limit->burst) {
- return NGX_BUSY;
- }
-
- if (account) {
- lr->excess = excess;
- lr->last = now;
- return NGX_OK;
- }
-
- lr->count++;
-
- ctx->node = lr;
-
- return NGX_AGAIN;
- }
-
- node = (rc < 0) ? node->left : node->right;
- }
-
- *ep = 0;
-
- size = offsetof(ngx_rbtree_node_t, color)
- + offsetof(ngx_http_limit_req_node_t, data)
- + key->len;
-
- ngx_http_limit_req_expire(ctx, 1);
-
- node = ngx_slab_alloc_locked(ctx->shpool, size);
-
- if (node == NULL) {
- ngx_http_limit_req_expire(ctx, 0);
-
- node = ngx_slab_alloc_locked(ctx->shpool, size);
- if (node == NULL) {
- ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
- "could not allocate node%s", ctx->shpool->log_ctx);
- return NGX_ERROR;
- }
- }
-
- node->key = hash;
-
- lr = (ngx_http_limit_req_node_t *) &node->color;
-
- lr->len = (u_short) key->len;
- lr->excess = 0;
-
- ngx_memcpy(lr->data, key->data, key->len);
-
- ngx_rbtree_insert(&ctx->sh->rbtree, node);
-
- ngx_queue_insert_head(&ctx->sh->queue, &lr->queue);
-
- if (account) {
- lr->last = now;
- lr->count = 0;
- return NGX_OK;
- }
-
- lr->last = 0;
- lr->count = 1;
-
- ctx->node = lr;
-
- return NGX_AGAIN;
-}
-
-
-static ngx_msec_t
-ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, ngx_uint_t n,
- ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit)
-{
- ngx_int_t excess;
- ngx_msec_t now, delay, max_delay;
- ngx_msec_int_t ms;
- ngx_http_limit_req_ctx_t *ctx;
- ngx_http_limit_req_node_t *lr;
-
- excess = *ep;
-
- if (excess == 0 || (*limit)->nodelay) {
- max_delay = 0;
-
- } else {
- ctx = (*limit)->shm_zone->data;
- max_delay = excess * 1000 / ctx->rate;
- }
-
- while (n--) {
- ctx = limits[n].shm_zone->data;
- lr = ctx->node;
-
- if (lr == NULL) {
- continue;
- }
-
- ngx_shmtx_lock(&ctx->shpool->mutex);
-
- now = ngx_current_msec;
- ms = (ngx_msec_int_t) (now - lr->last);
-
- excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000;
-
- if (excess < 0) {
- excess = 0;
- }
-
- lr->last = now;
- lr->excess = excess;
- lr->count--;
-
- ngx_shmtx_unlock(&ctx->shpool->mutex);
-
- ctx->node = NULL;
-
- if (limits[n].nodelay) {
- continue;
- }
-
- delay = excess * 1000 / ctx->rate;
-
- if (delay > max_delay) {
- max_delay = delay;
- *ep = excess;
- *limit = &limits[n];
- }
- }
-
- return max_delay;
-}
-
-
-static void
-ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, ngx_uint_t n)
-{
- ngx_int_t excess;
- ngx_msec_t now;
- ngx_queue_t *q;
- ngx_msec_int_t ms;
- ngx_rbtree_node_t *node;
- ngx_http_limit_req_node_t *lr;
-
- now = ngx_current_msec;
-
- /*
- * n == 1 deletes one or two zero rate entries
- * n == 0 deletes oldest entry by force
- * and one or two zero rate entries
- */
-
- while (n < 3) {
-
- if (ngx_queue_empty(&ctx->sh->queue)) {
- return;
- }
-
- q = ngx_queue_last(&ctx->sh->queue);
-
- lr = ngx_queue_data(q, ngx_http_limit_req_node_t, queue);
-
- if (lr->count) {
-
- /*
- * There is not much sense in looking further,
- * because we bump nodes on the lookup stage.
- */
-
- return;
- }
-
- if (n++ != 0) {
-
- ms = (ngx_msec_int_t) (now - lr->last);
- ms = ngx_abs(ms);
-
- if (ms < 60000) {
- return;
- }
-
- excess = lr->excess - ctx->rate * ms / 1000;
-
- if (excess > 0) {
- return;
- }
- }
-
- ngx_queue_remove(q);
-
- node = (ngx_rbtree_node_t *)
- ((u_char *) lr - offsetof(ngx_rbtree_node_t, color));
-
- ngx_rbtree_delete(&ctx->sh->rbtree, node);
-
- ngx_slab_free_locked(ctx->shpool, node);
- }
-}
-
-
-static ngx_int_t
-ngx_http_limit_req_init_zone(ngx_shm_zone_t *shm_zone, void *data)
-{
- ngx_http_limit_req_ctx_t *octx = data;
-
- size_t len;
- ngx_http_limit_req_ctx_t *ctx;
-
- ctx = shm_zone->data;
-
- if (octx) {
- if (ctx->key.value.len != octx->key.value.len
- || ngx_strncmp(ctx->key.value.data, octx->key.value.data,
- ctx->key.value.len)
- != 0)
- {
- ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
- "limit_req \"%V\" uses the \"%V\" key "
- "while previously it used the \"%V\" key",
- &shm_zone->shm.name, &ctx->key.value,
- &octx->key.value);
- return NGX_ERROR;
- }
-
- ctx->sh = octx->sh;
- ctx->shpool = octx->shpool;
-
- return NGX_OK;
- }
-
- ctx->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
-
- if (shm_zone->shm.exists) {
- ctx->sh = ctx->shpool->data;
-
- return NGX_OK;
- }
-
- ctx->sh = ngx_slab_alloc(ctx->shpool, sizeof(ngx_http_limit_req_shctx_t));
- if (ctx->sh == NULL) {
- return NGX_ERROR;
- }
-
- ctx->shpool->data = ctx->sh;
-
- ngx_rbtree_init(&ctx->sh->rbtree, &ctx->sh->sentinel,
- ngx_http_limit_req_rbtree_insert_value);
-
- ngx_queue_init(&ctx->sh->queue);
-
- len = sizeof(" in limit_req zone \"\"") + shm_zone->shm.name.len;
-
- ctx->shpool->log_ctx = ngx_slab_alloc(ctx->shpool, len);
- if (ctx->shpool->log_ctx == NULL) {
- return NGX_ERROR;
- }
-
- ngx_sprintf(ctx->shpool->log_ctx, " in limit_req zone \"%V\"%Z",
- &shm_zone->shm.name);
-
- ctx->shpool->log_nomem = 0;
-
- return NGX_OK;
-}
-
-
-static void *
-ngx_http_limit_req_create_conf(ngx_conf_t *cf)
-{
- ngx_http_limit_req_conf_t *conf;
-
- conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_conf_t));
- if (conf == NULL) {
- return NULL;
- }
-
- /*
- * set by ngx_pcalloc():
- *
- * conf->limits.elts = NULL;
- */
-
- conf->limit_log_level = NGX_CONF_UNSET_UINT;
- conf->status_code = NGX_CONF_UNSET_UINT;
-
- return conf;
-}
-
-
-static char *
-ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, void *child)
-{
- ngx_http_limit_req_conf_t *prev = parent;
- ngx_http_limit_req_conf_t *conf = child;
-
- if (conf->limits.elts == NULL) {
- conf->limits = prev->limits;
- }
-
- ngx_conf_merge_uint_value(conf->limit_log_level, prev->limit_log_level,
- NGX_LOG_ERR);
-
- conf->delay_log_level = (conf->limit_log_level == NGX_LOG_INFO) ?
- NGX_LOG_INFO : conf->limit_log_level + 1;
-
- ngx_conf_merge_uint_value(conf->status_code, prev->status_code,
- NGX_HTTP_SERVICE_UNAVAILABLE);
-
- return NGX_CONF_OK;
-}
-
-
-static char *
-ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
-{
- u_char *p;
- size_t len;
- ssize_t size;
- ngx_str_t *value, name, s;
- ngx_int_t rate, scale;
- ngx_uint_t i;
- ngx_shm_zone_t *shm_zone;
- ngx_http_limit_req_ctx_t *ctx;
- ngx_http_compile_complex_value_t ccv;
-
- value = cf->args->elts;
-
- ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_ctx_t));
- if (ctx == NULL) {
- return NGX_CONF_ERROR;
- }
-
- ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
-
- ccv.cf = cf;
- ccv.value = &value[1];
- ccv.complex_value = &ctx->key;
-
- if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
- return NGX_CONF_ERROR;
- }
-
- size = 0;
- rate = 1;
- scale = 1;
- name.len = 0;
-
- for (i = 2; i < cf->args->nelts; i++) {
-
- if (ngx_strncmp(value[i].data, "zone=", 5) == 0) {
-
- name.data = value[i].data + 5;
-
- p = (u_char *) ngx_strchr(name.data, ':');
-
- if (p == NULL) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid zone size \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- }
-
- name.len = p - name.data;
-
- s.data = p + 1;
- s.len = value[i].data + value[i].len - s.data;
-
- size = ngx_parse_size(&s);
-
- if (size == NGX_ERROR) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid zone size \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- }
-
- if (size < (ssize_t) (8 * ngx_pagesize)) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "zone \"%V\" is too small", &value[i]);
- return NGX_CONF_ERROR;
- }
-
- continue;
- }
-
- if (ngx_strncmp(value[i].data, "rate=", 5) == 0) {
-
- len = value[i].len;
- p = value[i].data + len - 3;
-
- if (ngx_strncmp(p, "r/s", 3) == 0) {
- scale = 1;
- len -= 3;
-
- } else if (ngx_strncmp(p, "r/m", 3) == 0) {
- scale = 60;
- len -= 3;
- }
-
- rate = ngx_atoi(value[i].data + 5, len - 5);
- if (rate <= 0) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid rate \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- }
-
- continue;
- }
-
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid parameter \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- }
-
- if (name.len == 0) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "\"%V\" must have \"zone\" parameter",
- &cmd->name);
- return NGX_CONF_ERROR;
- }
-
- ctx->rate = rate * 1000 / scale;
-
- shm_zone = ngx_shared_memory_add(cf, &name, size,
- &ngx_http_limit_req_module);
- if (shm_zone == NULL) {
- return NGX_CONF_ERROR;
- }
-
- if (shm_zone->data) {
- ctx = shm_zone->data;
-
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "%V \"%V\" is already bound to key \"%V\"",
- &cmd->name, &name, &ctx->key.value);
- return NGX_CONF_ERROR;
- }
-
- shm_zone->init = ngx_http_limit_req_init_zone;
- shm_zone->data = ctx;
-
- return NGX_CONF_OK;
-}
-
-
-static char *
-ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
-{
- ngx_http_limit_req_conf_t *lrcf = conf;
-
- ngx_int_t burst;
- ngx_str_t *value, s;
- ngx_uint_t i, nodelay;
- ngx_shm_zone_t *shm_zone;
- ngx_http_limit_req_limit_t *limit, *limits;
-
- value = cf->args->elts;
-
- shm_zone = NULL;
- burst = 0;
- nodelay = 0;
-
- for (i = 1; i < cf->args->nelts; i++) {
-
- if (ngx_strncmp(value[i].data, "zone=", 5) == 0) {
-
- s.len = value[i].len - 5;
- s.data = value[i].data + 5;
-
- shm_zone = ngx_shared_memory_add(cf, &s, 0,
- &ngx_http_limit_req_module);
- if (shm_zone == NULL) {
- return NGX_CONF_ERROR;
- }
-
- continue;
- }
-
- if (ngx_strncmp(value[i].data, "burst=", 6) == 0) {
-
- burst = ngx_atoi(value[i].data + 6, value[i].len - 6);
- if (burst <= 0) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid burst rate \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- }
-
- continue;
- }
-
- if (ngx_strcmp(value[i].data, "nodelay") == 0) {
- nodelay = 1;
- continue;
- }
-
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid parameter \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- }
-
- if (shm_zone == NULL) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "\"%V\" must have \"zone\" parameter",
- &cmd->name);
- return NGX_CONF_ERROR;
- }
-
- limits = lrcf->limits.elts;
-
- if (limits == NULL) {
- if (ngx_array_init(&lrcf->limits, cf->pool, 1,
- sizeof(ngx_http_limit_req_limit_t))
- != NGX_OK)
- {
- return NGX_CONF_ERROR;
- }
- }
-
- for (i = 0; i < lrcf->limits.nelts; i++) {
- if (shm_zone == limits[i].shm_zone) {
- return "is duplicate";
- }
- }
-
- limit = ngx_array_push(&lrcf->limits);
- if (limit == NULL) {
- return NGX_CONF_ERROR;
- }
-
- limit->shm_zone = shm_zone;
- limit->burst = burst * 1000;
- limit->nodelay = nodelay;
-
- return NGX_CONF_OK;
-}
-
-
-static ngx_int_t
-ngx_http_limit_req_init(ngx_conf_t *cf)
-{
- ngx_http_handler_pt *h;
- ngx_http_core_main_conf_t *cmcf;
-
- cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
-
- h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers);
- if (h == NULL) {
- return NGX_ERROR;
- }
-
- *h = ngx_http_limit_req_handler;
-
- return NGX_OK;
-}