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src/http/modules/ngx_http_map_module.c - nginx-1.7.10
Global variables defined
Data types defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_http.h>
- typedef struct {
- ngx_uint_t hash_max_size;
- ngx_uint_t hash_bucket_size;
- } ngx_http_map_conf_t;
- typedef struct {
- ngx_hash_keys_arrays_t keys;
- ngx_array_t *values_hash;
- ngx_array_t var_values;
- #if (NGX_PCRE)
- ngx_array_t regexes;
- #endif
- ngx_http_variable_value_t *default_value;
- ngx_conf_t *cf;
- ngx_uint_t hostnames;
- } ngx_http_map_conf_ctx_t;
- typedef struct {
- ngx_http_map_t map;
- ngx_http_complex_value_t value;
- ngx_http_variable_value_t *default_value;
- ngx_uint_t hostnames;
- } ngx_http_map_ctx_t;
- static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one,
- const void *two);
- static void *ngx_http_map_create_conf(ngx_conf_t *cf);
- static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
- static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
- static ngx_command_t ngx_http_map_commands[] = {
- { ngx_string("map"),
- NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
- ngx_http_map_block,
- NGX_HTTP_MAIN_CONF_OFFSET,
- 0,
- NULL },
- { ngx_string("map_hash_max_size"),
- NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_num_slot,
- NGX_HTTP_MAIN_CONF_OFFSET,
- offsetof(ngx_http_map_conf_t, hash_max_size),
- NULL },
- { ngx_string("map_hash_bucket_size"),
- NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_num_slot,
- NGX_HTTP_MAIN_CONF_OFFSET,
- offsetof(ngx_http_map_conf_t, hash_bucket_size),
- NULL },
- ngx_null_command
- };
- static ngx_http_module_t ngx_http_map_module_ctx = {
- NULL,
- NULL,
- ngx_http_map_create_conf,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL
- };
- ngx_module_t ngx_http_map_module = {
- NGX_MODULE_V1,
- &ngx_http_map_module_ctx,
- ngx_http_map_commands,
- NGX_HTTP_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NGX_MODULE_V1_PADDING
- };
- static ngx_int_t
- ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
- uintptr_t data)
- {
- ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
- ngx_str_t val;
- ngx_http_variable_value_t *value;
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "http map started");
- if (ngx_http_complex_value(r, &map->value, &val) != NGX_OK) {
- return NGX_ERROR;
- }
- if (map->hostnames && val.len > 0 && val.data[val.len - 1] == '.') {
- val.len--;
- }
- value = ngx_http_map_find(r, &map->map, &val);
- if (value == NULL) {
- value = map->default_value;
- }
- if (!value->valid) {
- value = ngx_http_get_flushed_variable(r, (uintptr_t) value->data);
- if (value == NULL || value->not_found) {
- value = &ngx_http_variable_null_value;
- }
- }
- *v = *value;
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "http map: \"%v\" \"%v\"", &val, v);
- return NGX_OK;
- }
- static void *
- ngx_http_map_create_conf(ngx_conf_t *cf)
- {
- ngx_http_map_conf_t *mcf;
- mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
- if (mcf == NULL) {
- return NULL;
- }
- mcf->hash_max_size = NGX_CONF_UNSET_UINT;
- mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
- return mcf;
- }
- static char *
- ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
- {
- ngx_http_map_conf_t *mcf = conf;
- char *rv;
- ngx_str_t *value, name;
- ngx_conf_t save;
- ngx_pool_t *pool;
- ngx_hash_init_t hash;
- ngx_http_map_ctx_t *map;
- ngx_http_variable_t *var;
- ngx_http_map_conf_ctx_t ctx;
- ngx_http_compile_complex_value_t ccv;
- if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
- mcf->hash_max_size = 2048;
- }
- if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
- mcf->hash_bucket_size = ngx_cacheline_size;
- } else {
- mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
- ngx_cacheline_size);
- }
- map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
- if (map == NULL) {
- return NGX_CONF_ERROR;
- }
- value = cf->args->elts;
- ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
- ccv.cf = cf;
- ccv.value = &value[1];
- ccv.complex_value = &map->value;
- if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
- return NGX_CONF_ERROR;
- }
- name = value[2];
- if (name.data[0] != '$') {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid variable name \"%V\"", &name);
- return NGX_CONF_ERROR;
- }
- name.len--;
- name.data++;
- var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
- if (var == NULL) {
- return NGX_CONF_ERROR;
- }
- var->get_handler = ngx_http_map_variable;
- var->data = (uintptr_t) map;
- pool = ngx_create_pool(NGX_DEFAULT_POOL_SIZE, cf->log);
- if (pool == NULL) {
- return NGX_CONF_ERROR;
- }
- ctx.keys.pool = cf->pool;
- ctx.keys.temp_pool = pool;
- if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
- ngx_destroy_pool(pool);
- return NGX_CONF_ERROR;
- }
- ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
- if (ctx.values_hash == NULL) {
- ngx_destroy_pool(pool);
- return NGX_CONF_ERROR;
- }
- if (ngx_array_init(&ctx.var_values, cf->pool, 2,
- sizeof(ngx_http_variable_value_t))
- != NGX_OK)
- {
- ngx_destroy_pool(pool);
- return NGX_CONF_ERROR;
- }
- #if (NGX_PCRE)
- if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t))
- != NGX_OK)
- {
- ngx_destroy_pool(pool);
- return NGX_CONF_ERROR;
- }
- #endif
- ctx.default_value = NULL;
- ctx.cf = &save;
- ctx.hostnames = 0;
- save = *cf;
- cf->pool = pool;
- cf->ctx = &ctx;
- cf->handler = ngx_http_map;
- cf->handler_conf = conf;
- rv = ngx_conf_parse(cf, NULL);
- *cf = save;
- if (rv != NGX_CONF_OK) {
- ngx_destroy_pool(pool);
- return rv;
- }
- map->default_value = ctx.default_value ? ctx.default_value:
- &ngx_http_variable_null_value;
- map->hostnames = ctx.hostnames;
- hash.key = ngx_hash_key_lc;
- hash.max_size = mcf->hash_max_size;
- hash.bucket_size = mcf->hash_bucket_size;
- hash.name = "map_hash";
- hash.pool = cf->pool;
- if (ctx.keys.keys.nelts) {
- hash.hash = &map->map.hash.hash;
- hash.temp_pool = NULL;
- if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
- != NGX_OK)
- {
- ngx_destroy_pool(pool);
- return NGX_CONF_ERROR;
- }
- }
- if (ctx.keys.dns_wc_head.nelts) {
- ngx_qsort(ctx.keys.dns_wc_head.elts,
- (size_t) ctx.keys.dns_wc_head.nelts,
- sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
- hash.hash = NULL;
- hash.temp_pool = pool;
- if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts,
- ctx.keys.dns_wc_head.nelts)
- != NGX_OK)
- {
- ngx_destroy_pool(pool);
- return NGX_CONF_ERROR;
- }
- map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash;
- }
- if (ctx.keys.dns_wc_tail.nelts) {
- ngx_qsort(ctx.keys.dns_wc_tail.elts,
- (size_t) ctx.keys.dns_wc_tail.nelts,
- sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
- hash.hash = NULL;
- hash.temp_pool = pool;
- if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts,
- ctx.keys.dns_wc_tail.nelts)
- != NGX_OK)
- {
- ngx_destroy_pool(pool);
- return NGX_CONF_ERROR;
- }
- map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
- }
- #if (NGX_PCRE)
- if (ctx.regexes.nelts) {
- map->map.regex = ctx.regexes.elts;
- map->map.nregex = ctx.regexes.nelts;
- }
- #endif
- ngx_destroy_pool(pool);
- return rv;
- }
- static int ngx_libc_cdecl
- ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
- {
- ngx_hash_key_t *first, *second;
- first = (ngx_hash_key_t *) one;
- second = (ngx_hash_key_t *) two;
- return ngx_dns_strcmp(first->key.data, second->key.data);
- }
- static char *
- ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
- {
- ngx_int_t rc, index;
- ngx_str_t *value, name;
- ngx_uint_t i, key;
- ngx_http_map_conf_ctx_t *ctx;
- ngx_http_variable_value_t *var, **vp;
- ctx = cf->ctx;
- value = cf->args->elts;
- if (cf->args->nelts == 1
- && ngx_strcmp(value[0].data, "hostnames") == 0)
- {
- ctx->hostnames = 1;
- return NGX_CONF_OK;
- } else if (cf->args->nelts != 2) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid number of the map parameters");
- return NGX_CONF_ERROR;
- }
- if (ngx_strcmp(value[0].data, "include") == 0) {
- return ngx_conf_include(cf, dummy, conf);
- }
- if (value[1].data[0] == '$') {
- name = value[1];
- name.len--;
- name.data++;
- index = ngx_http_get_variable_index(ctx->cf, &name);
- if (index == NGX_ERROR) {
- return NGX_CONF_ERROR;
- }
- var = ctx->var_values.elts;
- for (i = 0; i < ctx->var_values.nelts; i++) {
- if (index == (intptr_t) var[i].data) {
- var = &var[i];
- goto found;
- }
- }
- var = ngx_array_push(&ctx->var_values);
- if (var == NULL) {
- return NGX_CONF_ERROR;
- }
- var->valid = 0;
- var->no_cacheable = 0;
- var->not_found = 0;
- var->len = 0;
- var->data = (u_char *) (intptr_t) index;
- goto found;
- }
- key = 0;
- for (i = 0; i < value[1].len; i++) {
- key = ngx_hash(key, value[1].data[i]);
- }
- key %= ctx->keys.hsize;
- vp = ctx->values_hash[key].elts;
- if (vp) {
- for (i = 0; i < ctx->values_hash[key].nelts; i++) {
- if (value[1].len != (size_t) vp[i]->len) {
- continue;
- }
- if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
- var = vp[i];
- goto found;
- }
- }
- } else {
- if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
- sizeof(ngx_http_variable_value_t *))
- != NGX_OK)
- {
- return NGX_CONF_ERROR;
- }
- }
- var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
- if (var == NULL) {
- return NGX_CONF_ERROR;
- }
- var->len = value[1].len;
- var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
- if (var->data == NULL) {
- return NGX_CONF_ERROR;
- }
- var->valid = 1;
- var->no_cacheable = 0;
- var->not_found = 0;
- vp = ngx_array_push(&ctx->values_hash[key]);
- if (vp == NULL) {
- return NGX_CONF_ERROR;
- }
- *vp = var;
- found:
- if (ngx_strcmp(value[0].data, "default") == 0) {
- if (ctx->default_value) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "duplicate default map parameter");
- return NGX_CONF_ERROR;
- }
- ctx->default_value = var;
- return NGX_CONF_OK;
- }
- #if (NGX_PCRE)
- if (value[0].len && value[0].data[0] == '~') {
- ngx_regex_compile_t rc;
- ngx_http_map_regex_t *regex;
- u_char errstr[NGX_MAX_CONF_ERRSTR];
- regex = ngx_array_push(&ctx->regexes);
- if (regex == NULL) {
- return NGX_CONF_ERROR;
- }
- value[0].len--;
- value[0].data++;
- ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
- if (value[0].data[0] == '*') {
- value[0].len--;
- value[0].data++;
- rc.options = NGX_REGEX_CASELESS;
- }
- rc.pattern = value[0];
- rc.err.len = NGX_MAX_CONF_ERRSTR;
- rc.err.data = errstr;
- regex->regex = ngx_http_regex_compile(ctx->cf, &rc);
- if (regex->regex == NULL) {
- return NGX_CONF_ERROR;
- }
- regex->value = var;
- return NGX_CONF_OK;
- }
- #endif
- if (value[0].len && value[0].data[0] == '\\') {
- value[0].len--;
- value[0].data++;
- }
- rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
- (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
- if (rc == NGX_OK) {
- return NGX_CONF_OK;
- }
- if (rc == NGX_DECLINED) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid hostname or wildcard \"%V\"", &value[0]);
- }
- if (rc == NGX_BUSY) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "conflicting parameter \"%V\"", &value[0]);
- }
- return NGX_CONF_ERROR;
- }
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