If-Range support

["Alexander V. Inyukhin" <shurick@xxxxxxxxxxxxxx>]

Здравствуйте.

Скажите, пожалуйста, возможно ли поддержать
заголовок If-Range в nginx? Возникшую потребность
в этом заголовке я решил с помощью присоединённого
патча (относительно версии 0.5.30), но может быть
есть какой-нибудь более подходящий способ?

Спасибо.

diff --git a/src/http/modules/ngx_http_range_filter_module.c 
b/src/http/modules/ngx_http_range_filter_module.c
index 11da43d..7eb248f 100644
--- a/src/http/modules/ngx_http_range_filter_module.c
+++ b/src/http/modules/ngx_http_range_filter_module.c
@@ -150,6 +150,20 @@ ngx_http_range_header_filter(ngx_http_request_t *r)
         return ngx_http_next_header_filter(r);
     }
 
+    if (r->headers_in.if_range != NULL
+        && r->headers_out.last_modified_time != -1)
+    {
+        time_t  ir;
+        ir = ngx_http_parse_time(r->headers_in.if_range->value.data,
+                                 r->headers_in.if_range->value.len);
+        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                       "http ir:%d lm:%d", ir, 
r->headers_out.last_modified_time);
+        if (ir != r->headers_out.last_modified_time)
+        {
+            return ngx_http_next_header_filter(r);
+        }
+    }
+
     if (r->headers_in.range == NULL
         || r->headers_in.range->value.len < 7
         || ngx_strncasecmp(r->headers_in.range->value.data,
diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 0306bf6..8b9bfbe 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -77,6 +77,10 @@ ngx_http_header_t  ngx_http_headers_in[] = {
                  offsetof(ngx_http_headers_in_t, if_modified_since),
                  ngx_http_process_header_line },
 
+    { ngx_string("If-Range"),
+                 offsetof(ngx_http_headers_in_t, if_range),
+                 ngx_http_process_header_line },
+
     { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent),
                  ngx_http_process_header_line },
 
diff --git a/src/http/ngx_http_request.h b/src/http/ngx_http_request.h
index a380ac0..8e567bf 100644
--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -162,6 +162,7 @@ typedef struct {
     ngx_table_elt_t                  *host;
     ngx_table_elt_t                  *connection;
     ngx_table_elt_t                  *if_modified_since;
+    ngx_table_elt_t                  *if_range;
     ngx_table_elt_t                  *user_agent;
     ngx_table_elt_t                  *referer;
     ngx_table_elt_t                  *content_length;