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src/core/ngx_regex.c - nginx-1.7.10
Global variables defined
Data types defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- typedef struct {
- ngx_flag_t pcre_jit;
- } ngx_regex_conf_t;
- static void * ngx_libc_cdecl ngx_regex_malloc(size_t size);
- static void ngx_libc_cdecl ngx_regex_free(void *p);
- #if (NGX_HAVE_PCRE_JIT)
- static void ngx_pcre_free_studies(void *data);
- #endif
- static ngx_int_t ngx_regex_module_init(ngx_cycle_t *cycle);
- static void *ngx_regex_create_conf(ngx_cycle_t *cycle);
- static char *ngx_regex_init_conf(ngx_cycle_t *cycle, void *conf);
- static char *ngx_regex_pcre_jit(ngx_conf_t *cf, void *post, void *data);
- static ngx_conf_post_t ngx_regex_pcre_jit_post = { ngx_regex_pcre_jit };
- static ngx_command_t ngx_regex_commands[] = {
- { ngx_string("pcre_jit"),
- NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_flag_slot,
- 0,
- offsetof(ngx_regex_conf_t, pcre_jit),
- &ngx_regex_pcre_jit_post },
- ngx_null_command
- };
- static ngx_core_module_t ngx_regex_module_ctx = {
- ngx_string("regex"),
- ngx_regex_create_conf,
- ngx_regex_init_conf
- };
- ngx_module_t ngx_regex_module = {
- NGX_MODULE_V1,
- &ngx_regex_module_ctx,
- ngx_regex_commands,
- NGX_CORE_MODULE,
- NULL,
- ngx_regex_module_init,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NGX_MODULE_V1_PADDING
- };
- static ngx_pool_t *ngx_pcre_pool;
- static ngx_list_t *ngx_pcre_studies;
- void
- ngx_regex_init(void)
- {
- pcre_malloc = ngx_regex_malloc;
- pcre_free = ngx_regex_free;
- }
- static ngx_inline void
- ngx_regex_malloc_init(ngx_pool_t *pool)
- {
- #if (NGX_THREADS)
- ngx_core_tls_t *tls;
- if (ngx_threaded) {
- tls = ngx_thread_get_tls(ngx_core_tls_key);
- tls->pool = pool;
- return;
- }
- #endif
- ngx_pcre_pool = pool;
- }
- static ngx_inline void
- ngx_regex_malloc_done(void)
- {
- #if (NGX_THREADS)
- ngx_core_tls_t *tls;
- if (ngx_threaded) {
- tls = ngx_thread_get_tls(ngx_core_tls_key);
- tls->pool = NULL;
- return;
- }
- #endif
- ngx_pcre_pool = NULL;
- }
- ngx_int_t
- ngx_regex_compile(ngx_regex_compile_t *rc)
- {
- int n, erroff;
- char *p;
- pcre *re;
- const char *errstr;
- ngx_regex_elt_t *elt;
- ngx_regex_malloc_init(rc->pool);
- re = pcre_compile((const char *) rc->pattern.data, (int) rc->options,
- &errstr, &erroff, NULL);
-
- ngx_regex_malloc_done();
- if (re == NULL) {
- if ((size_t) erroff == rc->pattern.len) {
- rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
- "pcre_compile() failed: %s in \"%V\"",
- errstr, &rc->pattern)
- - rc->err.data;
- } else {
- rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
- "pcre_compile() failed: %s in \"%V\" at \"%s\"",
- errstr, &rc->pattern, rc->pattern.data + erroff)
- - rc->err.data;
- }
- return NGX_ERROR;
- }
- rc->regex = ngx_pcalloc(rc->pool, sizeof(ngx_regex_t));
- if (rc->regex == NULL) {
- goto nomem;
- }
- rc->regex->code = re;
-
- if (ngx_pcre_studies != NULL) {
- elt = ngx_list_push(ngx_pcre_studies);
- if (elt == NULL) {
- goto nomem;
- }
- elt->regex = rc->regex;
- elt->name = rc->pattern.data;
- }
- n = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &rc->captures);
- if (n < 0) {
- p = "pcre_fullinfo(\"%V\", PCRE_INFO_CAPTURECOUNT) failed: %d";
- goto failed;
- }
- if (rc->captures == 0) {
- return NGX_OK;
- }
- n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMECOUNT, &rc->named_captures);
- if (n < 0) {
- p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMECOUNT) failed: %d";
- goto failed;
- }
- if (rc->named_captures == 0) {
- return NGX_OK;
- }
- n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMEENTRYSIZE, &rc->name_size);
- if (n < 0) {
- p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMEENTRYSIZE) failed: %d";
- goto failed;
- }
- n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMETABLE, &rc->names);
- if (n < 0) {
- p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMETABLE) failed: %d";
- goto failed;
- }
- return NGX_OK;
- failed:
- rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, p, &rc->pattern, n)
- - rc->err.data;
- return NGX_ERROR;
- nomem:
- rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
- "regex \"%V\" compilation failed: no memory",
- &rc->pattern)
- - rc->err.data;
- return NGX_ERROR;
- }
- ngx_int_t
- ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log)
- {
- ngx_int_t n;
- ngx_uint_t i;
- ngx_regex_elt_t *re;
- re = a->elts;
- for (i = 0; i < a->nelts; i++) {
- n = ngx_regex_exec(re[i].regex, s, NULL, 0);
- if (n == NGX_REGEX_NO_MATCHED) {
- continue;
- }
- if (n < 0) {
- ngx_log_error(NGX_LOG_ALERT, log, 0,
- ngx_regex_exec_n " failed: %i on \"%V\" using \"%s\"",
- n, s, re[i].name);
- return NGX_ERROR;
- }
-
- return NGX_OK;
- }
- return NGX_DECLINED;
- }
- static void * ngx_libc_cdecl
- ngx_regex_malloc(size_t size)
- {
- ngx_pool_t *pool;
- #if (NGX_THREADS)
- ngx_core_tls_t *tls;
- if (ngx_threaded) {
- tls = ngx_thread_get_tls(ngx_core_tls_key);
- pool = tls->pool;
- } else {
- pool = ngx_pcre_pool;
- }
- #else
- pool = ngx_pcre_pool;
- #endif
- if (pool) {
- return ngx_palloc(pool, size);
- }
- return NULL;
- }
- static void ngx_libc_cdecl
- ngx_regex_free(void *p)
- {
- return;
- }
- #if (NGX_HAVE_PCRE_JIT)
- static void
- ngx_pcre_free_studies(void *data)
- {
- ngx_list_t *studies = data;
- ngx_uint_t i;
- ngx_list_part_t *part;
- ngx_regex_elt_t *elts;
- part = &studies->part;
- elts = part->elts;
- for (i = 0 ; ; i++) {
- if (i >= part->nelts) {
- if (part->next == NULL) {
- break;
- }
- part = part->next;
- elts = part->elts;
- i = 0;
- }
- if (elts[i].regex->extra != NULL) {
- pcre_free_study(elts[i].regex->extra);
- }
- }
- }
- #endif
- static ngx_int_t
- ngx_regex_module_init(ngx_cycle_t *cycle)
- {
- int opt;
- const char *errstr;
- ngx_uint_t i;
- ngx_list_part_t *part;
- ngx_regex_elt_t *elts;
- opt = 0;
- #if (NGX_HAVE_PCRE_JIT)
- {
- ngx_regex_conf_t *rcf;
- ngx_pool_cleanup_t *cln;
- rcf = (ngx_regex_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_regex_module);
- if (rcf->pcre_jit) {
- opt = PCRE_STUDY_JIT_COMPILE;
-
- cln = ngx_pool_cleanup_add(cycle->pool, 0);
- if (cln == NULL) {
- return NGX_ERROR;
- }
- cln->handler = ngx_pcre_free_studies;
- cln->data = ngx_pcre_studies;
- }
- }
- #endif
- ngx_regex_malloc_init(cycle->pool);
- part = &ngx_pcre_studies->part;
- elts = part->elts;
- for (i = 0 ; ; i++) {
- if (i >= part->nelts) {
- if (part->next == NULL) {
- break;
- }
- part = part->next;
- elts = part->elts;
- i = 0;
- }
- elts[i].regex->extra = pcre_study(elts[i].regex->code, opt, &errstr);
- if (errstr != NULL) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
- "pcre_study() failed: %s in \"%s\"",
- errstr, elts[i].name);
- }
- #if (NGX_HAVE_PCRE_JIT)
- if (opt & PCRE_STUDY_JIT_COMPILE) {
- int jit, n;
- jit = 0;
- n = pcre_fullinfo(elts[i].regex->code, elts[i].regex->extra,
- PCRE_INFO_JIT, &jit);
- if (n != 0 || jit != 1) {
- ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
- "JIT compiler does not support pattern: \"%s\"",
- elts[i].name);
- }
- }
- #endif
- }
- ngx_regex_malloc_done();
- ngx_pcre_studies = NULL;
- return NGX_OK;
- }
- static void *
- ngx_regex_create_conf(ngx_cycle_t *cycle)
- {
- ngx_regex_conf_t *rcf;
- rcf = ngx_pcalloc(cycle->pool, sizeof(ngx_regex_conf_t));
- if (rcf == NULL) {
- return NULL;
- }
- rcf->pcre_jit = NGX_CONF_UNSET;
- ngx_pcre_studies = ngx_list_create(cycle->pool, 8, sizeof(ngx_regex_elt_t));
- if (ngx_pcre_studies == NULL) {
- return NULL;
- }
- return rcf;
- }
- static char *
- ngx_regex_init_conf(ngx_cycle_t *cycle, void *conf)
- {
- ngx_regex_conf_t *rcf = conf;
- ngx_conf_init_value(rcf->pcre_jit, 0);
- return NGX_CONF_OK;
- }
- static char *
- ngx_regex_pcre_jit(ngx_conf_t *cf, void *post, void *data)
- {
- ngx_flag_t *fp = data;
- if (*fp == 0) {
- return NGX_CONF_OK;
- }
- #if (NGX_HAVE_PCRE_JIT)
- {
- int jit, r;
- jit = 0;
- r = pcre_config(PCRE_CONFIG_JIT, &jit);
- if (r != 0 || jit != 1) {
- ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
- "PCRE library does not support JIT");
- *fp = 0;
- }
- }
- #else
- ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
- "nginx was built without PCRE JIT support");
- *fp = 0;
- #endif
- return NGX_CONF_OK;
- }
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