| |
| /* |
| * 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_array_t *trailers; |
| } 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_multi_header_lines(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"), |
| offsetof(ngx_http_headers_out_t, cache_control), |
| ngx_http_add_multi_header_lines }, |
| |
| { ngx_string("Link"), |
| offsetof(ngx_http_headers_out_t, link), |
| ngx_http_add_multi_header_lines }, |
| |
| { 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, |
| offsetof(ngx_http_headers_conf_t, headers), |
| NULL }, |
| |
| { ngx_string("add_trailer"), |
| 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, |
| offsetof(ngx_http_headers_conf_t, trailers), |
| 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_http_output_body_filter_pt ngx_http_next_body_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; |
| |
| if (r != r->main) { |
| return ngx_http_next_header_filter(r); |
| } |
| |
| conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module); |
| |
| if (conf->expires == NGX_HTTP_EXPIRES_OFF |
| && conf->headers == NULL |
| && conf->trailers == NULL) |
| { |
| 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: |
| case NGX_HTTP_PERMANENT_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; |
| } |
| } |
| } |
| |
| if (conf->trailers) { |
| h = conf->trailers->elts; |
| for (i = 0; i < conf->trailers->nelts; i++) { |
| |
| if (!safe_status && !h[i].always) { |
| continue; |
| } |
| |
| r->expect_trailers = 1; |
| break; |
| } |
| } |
| |
| return ngx_http_next_header_filter(r); |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_trailers_filter(ngx_http_request_t *r, ngx_chain_t *in) |
| { |
| ngx_str_t value; |
| ngx_uint_t i, safe_status; |
| ngx_chain_t *cl; |
| ngx_table_elt_t *t; |
| 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 (in == NULL |
| || conf->trailers == NULL |
| || !r->expect_trailers |
| || r->header_only) |
| { |
| return ngx_http_next_body_filter(r, in); |
| } |
| |
| for (cl = in; cl; cl = cl->next) { |
| if (cl->buf->last_buf) { |
| break; |
| } |
| } |
| |
| if (cl == NULL) { |
| return ngx_http_next_body_filter(r, in); |
| } |
| |
| 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: |
| case NGX_HTTP_PERMANENT_REDIRECT: |
| safe_status = 1; |
| break; |
| |
| default: |
| safe_status = 0; |
| break; |
| } |
| |
| h = conf->trailers->elts; |
| for (i = 0; i < conf->trailers->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 (value.len) { |
| t = ngx_list_push(&r->headers_out.trailers); |
| if (t == NULL) { |
| return NGX_ERROR; |
| } |
| |
| t->key = h[i].key; |
| t->value = value; |
| t->hash = 1; |
| } |
| } |
| |
| return ngx_http_next_body_filter(r, in); |
| } |
| |
| |
| 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; |
| } |
| |
| 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 = ngx_array_push(&r->headers_out.cache_control); |
| if (ccp == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *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_multi_header_lines(ngx_http_request_t *r, |
| ngx_http_header_val_t *hv, ngx_str_t *value) |
| { |
| ngx_array_t *pa; |
| ngx_table_elt_t *h, **ph; |
| |
| if (value->len == 0) { |
| return NGX_OK; |
| } |
| |
| pa = (ngx_array_t *) ((char *) &r->headers_out + hv->offset); |
| |
| if (pa->elts == NULL) { |
| if (ngx_array_init(pa, r->pool, 1, sizeof(ngx_table_elt_t *)) != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| } |
| |
| h = ngx_list_push(&r->headers_out.headers); |
| if (h == NULL) { |
| return NGX_ERROR; |
| } |
| |
| h->hash = 1; |
| h->key = hv->key; |
| h->value = *value; |
| |
| ph = ngx_array_push(pa); |
| if (ph == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ph = h; |
| |
| 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->trailers = 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; |
| } |
| |
| if (conf->trailers == NULL) { |
| conf->trailers = prev->trailers; |
| } |
| |
| 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; |
| |
| ngx_http_next_body_filter = ngx_http_top_body_filter; |
| ngx_http_top_body_filter = ngx_http_trailers_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_array_t **headers; |
| ngx_http_header_val_t *hv; |
| ngx_http_set_header_t *set; |
| ngx_http_compile_complex_value_t ccv; |
| |
| value = cf->args->elts; |
| |
| headers = (ngx_array_t **) ((char *) hcf + cmd->offset); |
| |
| if (*headers == NULL) { |
| *headers = ngx_array_create(cf->pool, 1, |
| sizeof(ngx_http_header_val_t)); |
| if (*headers == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| } |
| |
| hv = ngx_array_push(*headers); |
| if (hv == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| hv->key = value[1]; |
| hv->handler = NULL; |
| hv->offset = 0; |
| hv->always = 0; |
| |
| if (headers == &hcf->headers) { |
| hv->handler = ngx_http_add_header; |
| |
| 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; |
| } |
