diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_not_modified_filter_module.c')
| -rw-r--r-- | app/nginx/src/http/modules/ngx_http_not_modified_filter_module.c | 266 |
1 files changed, 0 insertions, 266 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_not_modified_filter_module.c b/app/nginx/src/http/modules/ngx_http_not_modified_filter_module.c deleted file mode 100644 index 032ba96..0000000 --- a/app/nginx/src/http/modules/ngx_http_not_modified_filter_module.c +++ /dev/null @@ -1,266 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_http.h> - - -static ngx_uint_t ngx_http_test_if_unmodified(ngx_http_request_t *r); -static ngx_uint_t ngx_http_test_if_modified(ngx_http_request_t *r); -static ngx_uint_t ngx_http_test_if_match(ngx_http_request_t *r, - ngx_table_elt_t *header, ngx_uint_t weak); -static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf); - - -static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { - NULL, /* preconfiguration */ - ngx_http_not_modified_filter_init, /* postconfiguration */ - - NULL, /* create main configuration */ - NULL, /* init main configuration */ - - NULL, /* create server configuration */ - NULL, /* merge server configuration */ - - NULL, /* create location configuration */ - NULL /* merge location configuration */ -}; - - -ngx_module_t ngx_http_not_modified_filter_module = { - NGX_MODULE_V1, - &ngx_http_not_modified_filter_module_ctx, /* module context */ - NULL, /* 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_not_modified_header_filter(ngx_http_request_t *r) -{ - if (r->headers_out.status != NGX_HTTP_OK - || r != r->main - || r->disable_not_modified) - { - return ngx_http_next_header_filter(r); - } - - if (r->headers_in.if_unmodified_since - && !ngx_http_test_if_unmodified(r)) - { - return ngx_http_filter_finalize_request(r, NULL, - NGX_HTTP_PRECONDITION_FAILED); - } - - if (r->headers_in.if_match - && !ngx_http_test_if_match(r, r->headers_in.if_match, 0)) - { - return ngx_http_filter_finalize_request(r, NULL, - NGX_HTTP_PRECONDITION_FAILED); - } - - if (r->headers_in.if_modified_since || r->headers_in.if_none_match) { - - if (r->headers_in.if_modified_since - && ngx_http_test_if_modified(r)) - { - return ngx_http_next_header_filter(r); - } - - if (r->headers_in.if_none_match - && !ngx_http_test_if_match(r, r->headers_in.if_none_match, 1)) - { - return ngx_http_next_header_filter(r); - } - - /* not modified */ - - r->headers_out.status = NGX_HTTP_NOT_MODIFIED; - r->headers_out.status_line.len = 0; - r->headers_out.content_type.len = 0; - ngx_http_clear_content_length(r); - ngx_http_clear_accept_ranges(r); - - if (r->headers_out.content_encoding) { - r->headers_out.content_encoding->hash = 0; - r->headers_out.content_encoding = NULL; - } - - return ngx_http_next_header_filter(r); - } - - return ngx_http_next_header_filter(r); -} - - -static ngx_uint_t -ngx_http_test_if_unmodified(ngx_http_request_t *r) -{ - time_t iums; - - if (r->headers_out.last_modified_time == (time_t) -1) { - return 0; - } - - iums = ngx_parse_http_time(r->headers_in.if_unmodified_since->value.data, - r->headers_in.if_unmodified_since->value.len); - - ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, - "http iums:%T lm:%T", iums, r->headers_out.last_modified_time); - - if (iums >= r->headers_out.last_modified_time) { - return 1; - } - - return 0; -} - - -static ngx_uint_t -ngx_http_test_if_modified(ngx_http_request_t *r) -{ - time_t ims; - ngx_http_core_loc_conf_t *clcf; - - if (r->headers_out.last_modified_time == (time_t) -1) { - return 1; - } - - clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); - - if (clcf->if_modified_since == NGX_HTTP_IMS_OFF) { - return 1; - } - - ims = ngx_parse_http_time(r->headers_in.if_modified_since->value.data, - r->headers_in.if_modified_since->value.len); - - ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, - "http ims:%T lm:%T", ims, r->headers_out.last_modified_time); - - if (ims == r->headers_out.last_modified_time) { - return 0; - } - - if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT - || ims < r->headers_out.last_modified_time) - { - return 1; - } - - return 0; -} - - -static ngx_uint_t -ngx_http_test_if_match(ngx_http_request_t *r, ngx_table_elt_t *header, - ngx_uint_t weak) -{ - u_char *start, *end, ch; - ngx_str_t etag, *list; - - list = &header->value; - - if (list->len == 1 && list->data[0] == '*') { - return 1; - } - - if (r->headers_out.etag == NULL) { - return 0; - } - - etag = r->headers_out.etag->value; - - ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, - "http im:\"%V\" etag:%V", list, &etag); - - if (weak - && etag.len > 2 - && etag.data[0] == 'W' - && etag.data[1] == '/') - { - etag.len -= 2; - etag.data += 2; - } - - start = list->data; - end = list->data + list->len; - - while (start < end) { - - if (weak - && end - start > 2 - && start[0] == 'W' - && start[1] == '/') - { - start += 2; - } - - if (etag.len > (size_t) (end - start)) { - return 0; - } - - if (ngx_strncmp(start, etag.data, etag.len) != 0) { - goto skip; - } - - start += etag.len; - - while (start < end) { - ch = *start; - - if (ch == ' ' || ch == '\t') { - start++; - continue; - } - - break; - } - - if (start == end || *start == ',') { - return 1; - } - - skip: - - while (start < end && *start != ',') { start++; } - while (start < end) { - ch = *start; - - if (ch == ' ' || ch == '\t' || ch == ',') { - start++; - continue; - } - - break; - } - } - - return 0; -} - - -static ngx_int_t -ngx_http_not_modified_filter_init(ngx_conf_t *cf) -{ - ngx_http_next_header_filter = ngx_http_top_header_filter; - ngx_http_top_header_filter = ngx_http_not_modified_header_filter; - - return NGX_OK; -} |