diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_headers_filter_module.c')
| -rw-r--r-- | app/nginx/src/http/modules/ngx_http_headers_filter_module.c | 741 |
1 files changed, 0 insertions, 741 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_headers_filter_module.c b/app/nginx/src/http/modules/ngx_http_headers_filter_module.c deleted file mode 100644 index 6738afe..0000000 --- a/app/nginx/src/http/modules/ngx_http_headers_filter_module.c +++ /dev/null @@ -1,741 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_http.h> - - -typedef struct ngx_http_header_val_s ngx_http_header_val_t; - -typedef ngx_int_t (*ngx_http_set_header_pt)(ngx_http_request_t *r, - ngx_http_header_val_t *hv, ngx_str_t *value); - - -typedef struct { - ngx_str_t name; - ngx_uint_t offset; - ngx_http_set_header_pt handler; -} ngx_http_set_header_t; - - -struct ngx_http_header_val_s { - ngx_http_complex_value_t value; - ngx_str_t key; - ngx_http_set_header_pt handler; - ngx_uint_t offset; - ngx_uint_t always; /* unsigned always:1 */ -}; - - -typedef enum { - NGX_HTTP_EXPIRES_OFF, - NGX_HTTP_EXPIRES_EPOCH, - NGX_HTTP_EXPIRES_MAX, - NGX_HTTP_EXPIRES_ACCESS, - NGX_HTTP_EXPIRES_MODIFIED, - NGX_HTTP_EXPIRES_DAILY, - NGX_HTTP_EXPIRES_UNSET -} ngx_http_expires_t; - - -typedef struct { - ngx_http_expires_t expires; - time_t expires_time; - ngx_http_complex_value_t *expires_value; - ngx_array_t *headers; -} ngx_http_headers_conf_t; - - -static ngx_int_t ngx_http_set_expires(ngx_http_request_t *r, - ngx_http_headers_conf_t *conf); -static ngx_int_t ngx_http_parse_expires(ngx_str_t *value, - ngx_http_expires_t *expires, time_t *expires_time, char **err); -static ngx_int_t ngx_http_add_cache_control(ngx_http_request_t *r, - ngx_http_header_val_t *hv, ngx_str_t *value); -static ngx_int_t ngx_http_add_header(ngx_http_request_t *r, - ngx_http_header_val_t *hv, ngx_str_t *value); -static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r, - ngx_http_header_val_t *hv, ngx_str_t *value); -static ngx_int_t ngx_http_set_response_header(ngx_http_request_t *r, - ngx_http_header_val_t *hv, ngx_str_t *value); - -static void *ngx_http_headers_create_conf(ngx_conf_t *cf); -static char *ngx_http_headers_merge_conf(ngx_conf_t *cf, - void *parent, void *child); -static ngx_int_t ngx_http_headers_filter_init(ngx_conf_t *cf); -static char *ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, - void *conf); -static char *ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, - void *conf); - - -static ngx_http_set_header_t ngx_http_set_headers[] = { - - { ngx_string("Cache-Control"), 0, ngx_http_add_cache_control }, - - { ngx_string("Last-Modified"), - offsetof(ngx_http_headers_out_t, last_modified), - ngx_http_set_last_modified }, - - { ngx_string("ETag"), - offsetof(ngx_http_headers_out_t, etag), - ngx_http_set_response_header }, - - { ngx_null_string, 0, NULL } -}; - - -static ngx_command_t ngx_http_headers_filter_commands[] = { - - { ngx_string("expires"), - NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF - |NGX_CONF_TAKE12, - ngx_http_headers_expires, - NGX_HTTP_LOC_CONF_OFFSET, - 0, - NULL}, - - { ngx_string("add_header"), - NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF - |NGX_CONF_TAKE23, - ngx_http_headers_add, - NGX_HTTP_LOC_CONF_OFFSET, - 0, - NULL}, - - ngx_null_command -}; - - -static ngx_http_module_t ngx_http_headers_filter_module_ctx = { - NULL, /* preconfiguration */ - ngx_http_headers_filter_init, /* postconfiguration */ - - NULL, /* create main configuration */ - NULL, /* init main configuration */ - - NULL, /* create server configuration */ - NULL, /* merge server configuration */ - - ngx_http_headers_create_conf, /* create location configuration */ - ngx_http_headers_merge_conf /* merge location configuration */ -}; - - -ngx_module_t ngx_http_headers_filter_module = { - NGX_MODULE_V1, - &ngx_http_headers_filter_module_ctx, /* module context */ - ngx_http_headers_filter_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_http_output_header_filter_pt ngx_http_next_header_filter; - - -static ngx_int_t -ngx_http_headers_filter(ngx_http_request_t *r) -{ - ngx_str_t value; - ngx_uint_t i, safe_status; - ngx_http_header_val_t *h; - ngx_http_headers_conf_t *conf; - - conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module); - - if ((conf->expires == NGX_HTTP_EXPIRES_OFF && conf->headers == NULL) - || r != r->main) - { - return ngx_http_next_header_filter(r); - } - - switch (r->headers_out.status) { - - case NGX_HTTP_OK: - case NGX_HTTP_CREATED: - case NGX_HTTP_NO_CONTENT: - case NGX_HTTP_PARTIAL_CONTENT: - case NGX_HTTP_MOVED_PERMANENTLY: - case NGX_HTTP_MOVED_TEMPORARILY: - case NGX_HTTP_SEE_OTHER: - case NGX_HTTP_NOT_MODIFIED: - case NGX_HTTP_TEMPORARY_REDIRECT: - safe_status = 1; - break; - - default: - safe_status = 0; - break; - } - - if (conf->expires != NGX_HTTP_EXPIRES_OFF && safe_status) { - if (ngx_http_set_expires(r, conf) != NGX_OK) { - return NGX_ERROR; - } - } - - if (conf->headers) { - h = conf->headers->elts; - for (i = 0; i < conf->headers->nelts; i++) { - - if (!safe_status && !h[i].always) { - continue; - } - - if (ngx_http_complex_value(r, &h[i].value, &value) != NGX_OK) { - return NGX_ERROR; - } - - if (h[i].handler(r, &h[i], &value) != NGX_OK) { - return NGX_ERROR; - } - } - } - - return ngx_http_next_header_filter(r); -} - - -static ngx_int_t -ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf) -{ - char *err; - size_t len; - time_t now, expires_time, max_age; - ngx_str_t value; - ngx_int_t rc; - ngx_uint_t i; - ngx_table_elt_t *e, *cc, **ccp; - ngx_http_expires_t expires; - - expires = conf->expires; - expires_time = conf->expires_time; - - if (conf->expires_value != NULL) { - - if (ngx_http_complex_value(r, conf->expires_value, &value) != NGX_OK) { - return NGX_ERROR; - } - - rc = ngx_http_parse_expires(&value, &expires, &expires_time, &err); - - if (rc != NGX_OK) { - return NGX_OK; - } - - if (expires == NGX_HTTP_EXPIRES_OFF) { - return NGX_OK; - } - } - - e = r->headers_out.expires; - - if (e == NULL) { - - e = ngx_list_push(&r->headers_out.headers); - if (e == NULL) { - return NGX_ERROR; - } - - r->headers_out.expires = e; - - e->hash = 1; - ngx_str_set(&e->key, "Expires"); - } - - len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT"); - e->value.len = len - 1; - - ccp = r->headers_out.cache_control.elts; - - if (ccp == NULL) { - - if (ngx_array_init(&r->headers_out.cache_control, r->pool, - 1, sizeof(ngx_table_elt_t *)) - != NGX_OK) - { - return NGX_ERROR; - } - - ccp = ngx_array_push(&r->headers_out.cache_control); - if (ccp == NULL) { - return NGX_ERROR; - } - - cc = ngx_list_push(&r->headers_out.headers); - if (cc == NULL) { - return NGX_ERROR; - } - - cc->hash = 1; - ngx_str_set(&cc->key, "Cache-Control"); - *ccp = cc; - - } else { - for (i = 1; i < r->headers_out.cache_control.nelts; i++) { - ccp[i]->hash = 0; - } - - cc = ccp[0]; - } - - if (expires == NGX_HTTP_EXPIRES_EPOCH) { - e->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT"; - ngx_str_set(&cc->value, "no-cache"); - return NGX_OK; - } - - if (expires == NGX_HTTP_EXPIRES_MAX) { - e->value.data = (u_char *) "Thu, 31 Dec 2037 23:55:55 GMT"; - /* 10 years */ - ngx_str_set(&cc->value, "max-age=315360000"); - return NGX_OK; - } - - e->value.data = ngx_pnalloc(r->pool, len); - if (e->value.data == NULL) { - return NGX_ERROR; - } - - if (expires_time == 0 && expires != NGX_HTTP_EXPIRES_DAILY) { - ngx_memcpy(e->value.data, ngx_cached_http_time.data, - ngx_cached_http_time.len + 1); - ngx_str_set(&cc->value, "max-age=0"); - return NGX_OK; - } - - now = ngx_time(); - - if (expires == NGX_HTTP_EXPIRES_DAILY) { - expires_time = ngx_next_time(expires_time); - max_age = expires_time - now; - - } else if (expires == NGX_HTTP_EXPIRES_ACCESS - || r->headers_out.last_modified_time == -1) - { - max_age = expires_time; - expires_time += now; - - } else { - expires_time += r->headers_out.last_modified_time; - max_age = expires_time - now; - } - - ngx_http_time(e->value.data, expires_time); - - if (conf->expires_time < 0 || max_age < 0) { - ngx_str_set(&cc->value, "no-cache"); - return NGX_OK; - } - - cc->value.data = ngx_pnalloc(r->pool, - sizeof("max-age=") + NGX_TIME_T_LEN + 1); - if (cc->value.data == NULL) { - return NGX_ERROR; - } - - cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T", max_age) - - cc->value.data; - - return NGX_OK; -} - - -static ngx_int_t -ngx_http_parse_expires(ngx_str_t *value, ngx_http_expires_t *expires, - time_t *expires_time, char **err) -{ - ngx_uint_t minus; - - if (*expires != NGX_HTTP_EXPIRES_MODIFIED) { - - if (value->len == 5 && ngx_strncmp(value->data, "epoch", 5) == 0) { - *expires = NGX_HTTP_EXPIRES_EPOCH; - return NGX_OK; - } - - if (value->len == 3 && ngx_strncmp(value->data, "max", 3) == 0) { - *expires = NGX_HTTP_EXPIRES_MAX; - return NGX_OK; - } - - if (value->len == 3 && ngx_strncmp(value->data, "off", 3) == 0) { - *expires = NGX_HTTP_EXPIRES_OFF; - return NGX_OK; - } - } - - if (value->len && value->data[0] == '@') { - value->data++; - value->len--; - minus = 0; - - if (*expires == NGX_HTTP_EXPIRES_MODIFIED) { - *err = "daily time cannot be used with \"modified\" parameter"; - return NGX_ERROR; - } - - *expires = NGX_HTTP_EXPIRES_DAILY; - - } else if (value->len && value->data[0] == '+') { - value->data++; - value->len--; - minus = 0; - - } else if (value->len && value->data[0] == '-') { - value->data++; - value->len--; - minus = 1; - - } else { - minus = 0; - } - - *expires_time = ngx_parse_time(value, 1); - - if (*expires_time == (time_t) NGX_ERROR) { - *err = "invalid value"; - return NGX_ERROR; - } - - if (*expires == NGX_HTTP_EXPIRES_DAILY - && *expires_time > 24 * 60 * 60) - { - *err = "daily time value must be less than 24 hours"; - return NGX_ERROR; - } - - if (minus) { - *expires_time = - *expires_time; - } - - return NGX_OK; -} - - -static ngx_int_t -ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, - ngx_str_t *value) -{ - ngx_table_elt_t *h; - - if (value->len) { - h = ngx_list_push(&r->headers_out.headers); - if (h == NULL) { - return NGX_ERROR; - } - - h->hash = 1; - h->key = hv->key; - h->value = *value; - } - - return NGX_OK; -} - - -static ngx_int_t -ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_header_val_t *hv, - ngx_str_t *value) -{ - ngx_table_elt_t *cc, **ccp; - - if (value->len == 0) { - return NGX_OK; - } - - ccp = r->headers_out.cache_control.elts; - - if (ccp == NULL) { - - if (ngx_array_init(&r->headers_out.cache_control, r->pool, - 1, sizeof(ngx_table_elt_t *)) - != NGX_OK) - { - return NGX_ERROR; - } - } - - ccp = ngx_array_push(&r->headers_out.cache_control); - if (ccp == NULL) { - return NGX_ERROR; - } - - cc = ngx_list_push(&r->headers_out.headers); - if (cc == NULL) { - return NGX_ERROR; - } - - cc->hash = 1; - ngx_str_set(&cc->key, "Cache-Control"); - cc->value = *value; - - *ccp = cc; - - return NGX_OK; -} - - -static ngx_int_t -ngx_http_set_last_modified(ngx_http_request_t *r, ngx_http_header_val_t *hv, - ngx_str_t *value) -{ - if (ngx_http_set_response_header(r, hv, value) != NGX_OK) { - return NGX_ERROR; - } - - r->headers_out.last_modified_time = - (value->len) ? ngx_parse_http_time(value->data, value->len) : -1; - - return NGX_OK; -} - - -static ngx_int_t -ngx_http_set_response_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, - ngx_str_t *value) -{ - ngx_table_elt_t *h, **old; - - old = (ngx_table_elt_t **) ((char *) &r->headers_out + hv->offset); - - if (value->len == 0) { - if (*old) { - (*old)->hash = 0; - *old = NULL; - } - - return NGX_OK; - } - - if (*old) { - h = *old; - - } else { - h = ngx_list_push(&r->headers_out.headers); - if (h == NULL) { - return NGX_ERROR; - } - - *old = h; - } - - h->hash = 1; - h->key = hv->key; - h->value = *value; - - return NGX_OK; -} - - -static void * -ngx_http_headers_create_conf(ngx_conf_t *cf) -{ - ngx_http_headers_conf_t *conf; - - conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_headers_conf_t)); - if (conf == NULL) { - return NULL; - } - - /* - * set by ngx_pcalloc(): - * - * conf->headers = NULL; - * conf->expires_time = 0; - * conf->expires_value = NULL; - */ - - conf->expires = NGX_HTTP_EXPIRES_UNSET; - - return conf; -} - - -static char * -ngx_http_headers_merge_conf(ngx_conf_t *cf, void *parent, void *child) -{ - ngx_http_headers_conf_t *prev = parent; - ngx_http_headers_conf_t *conf = child; - - if (conf->expires == NGX_HTTP_EXPIRES_UNSET) { - conf->expires = prev->expires; - conf->expires_time = prev->expires_time; - conf->expires_value = prev->expires_value; - - if (conf->expires == NGX_HTTP_EXPIRES_UNSET) { - conf->expires = NGX_HTTP_EXPIRES_OFF; - } - } - - if (conf->headers == NULL) { - conf->headers = prev->headers; - } - - return NGX_CONF_OK; -} - - -static ngx_int_t -ngx_http_headers_filter_init(ngx_conf_t *cf) -{ - ngx_http_next_header_filter = ngx_http_top_header_filter; - ngx_http_top_header_filter = ngx_http_headers_filter; - - return NGX_OK; -} - - -static char * -ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) -{ - ngx_http_headers_conf_t *hcf = conf; - - char *err; - ngx_str_t *value; - ngx_int_t rc; - ngx_uint_t n; - ngx_http_complex_value_t cv; - ngx_http_compile_complex_value_t ccv; - - if (hcf->expires != NGX_HTTP_EXPIRES_UNSET) { - return "is duplicate"; - } - - value = cf->args->elts; - - if (cf->args->nelts == 2) { - - hcf->expires = NGX_HTTP_EXPIRES_ACCESS; - - n = 1; - - } else { /* cf->args->nelts == 3 */ - - if (ngx_strcmp(value[1].data, "modified") != 0) { - return "invalid value"; - } - - hcf->expires = NGX_HTTP_EXPIRES_MODIFIED; - - n = 2; - } - - ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); - - ccv.cf = cf; - ccv.value = &value[n]; - ccv.complex_value = &cv; - - if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { - return NGX_CONF_ERROR; - } - - if (cv.lengths != NULL) { - - hcf->expires_value = ngx_palloc(cf->pool, - sizeof(ngx_http_complex_value_t)); - if (hcf->expires_value == NULL) { - return NGX_CONF_ERROR; - } - - *hcf->expires_value = cv; - - return NGX_CONF_OK; - } - - rc = ngx_http_parse_expires(&value[n], &hcf->expires, &hcf->expires_time, - &err); - if (rc != NGX_OK) { - return err; - } - - return NGX_CONF_OK; -} - - -static char * -ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) -{ - ngx_http_headers_conf_t *hcf = conf; - - ngx_str_t *value; - ngx_uint_t i; - ngx_http_header_val_t *hv; - ngx_http_set_header_t *set; - ngx_http_compile_complex_value_t ccv; - - value = cf->args->elts; - - if (hcf->headers == NULL) { - hcf->headers = ngx_array_create(cf->pool, 1, - sizeof(ngx_http_header_val_t)); - if (hcf->headers == NULL) { - return NGX_CONF_ERROR; - } - } - - hv = ngx_array_push(hcf->headers); - if (hv == NULL) { - return NGX_CONF_ERROR; - } - - hv->key = value[1]; - hv->handler = ngx_http_add_header; - hv->offset = 0; - hv->always = 0; - - set = ngx_http_set_headers; - for (i = 0; set[i].name.len; i++) { - if (ngx_strcasecmp(value[1].data, set[i].name.data) != 0) { - continue; - } - - hv->offset = set[i].offset; - hv->handler = set[i].handler; - - break; - } - - if (value[2].len == 0) { - ngx_memzero(&hv->value, sizeof(ngx_http_complex_value_t)); - - } else { - ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); - - ccv.cf = cf; - ccv.value = &value[2]; - ccv.complex_value = &hv->value; - - if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { - return NGX_CONF_ERROR; - } - } - - if (cf->args->nelts == 3) { - return NGX_CONF_OK; - } - - if (ngx_strcmp(value[3].data, "always") != 0) { - ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, - "invalid parameter \"%V\"", &value[3]); - return NGX_CONF_ERROR; - } - - hv->always = 1; - - return NGX_CONF_OK; -} |