我们有一个Node/express
Web 应用程序,它通过express.static()
. nginx
它前面有一个服务器,当前配置为gzip
这些静态资产请求,如果user agent
可以的话。
但是,尽管按预期nginx
执行,但它正在从原点删除标头,并改为设置。这会破坏我们的.gzip
Content-Length
Transfer-Encoding: chunked
CDN
JS
以下是来自节点后端和来自的典型静态资产请求(在本例中为文件)的响应nginx
:
要求:
curl -s -D - 'http://my_node_app/res/my_js.js' -H 'Accept-Encoding: gzip, deflate, sdch' -H 'Connection: keep-alive' --compressed -o /dev/null
来自 Node 的响应标头:
HTTP/1.1 200 OK
Accept-Ranges: bytes
Date: Wed, 07 Jan 2015 02:24:55 GMT
Cache-Control: public, max-age=0
Last-Modified: Wed, 07 Jan 2015 01:12:05 GMT
Content-Type: application/javascript
Content-Length: 37386 // <--- The expected header
Connection: keep-alive
来自 nginx 的响应标头:
HTTP/1.1 200 OK
Server: nginx
Date: Wed, 07 Jan 2015 02:24:55 GMT
Content-Type: application/javascript
Transfer-Encoding: chunked // <--- The problematic header
Connection: keep-alive
Vary: Accept-Encoding
Cache-Control: public, max-age=0
Last-Modified: Wed, 07 Jan 2015 01:12:05 GMT
Content-Encoding: gzip
我们当前nginx
的静态资产配置location
如下所示:
nginx 配置:
# cache file paths that start with /res/
location /res/ {
limit_except GET HEAD { }
# http://nginx.com/resources/admin-guide/caching/
# http://nginx.org/en/docs/http/ngx_http_proxy_module.html
proxy_buffers 8 128k;
#proxy_buffer_size 256k;
#proxy_busy_buffers_size 256k;
# The cache depends on proxy buffers, and will not work if proxy_buffering is set to off.
proxy_buffering on;
proxy_http_version 1.1;
proxy_set_header Connection "";
proxy_connect_timeout 2s;
proxy_read_timeout 5s;
proxy_pass http://node_backend;
chunked_transfer_encoding off;
proxy_cache my_app;
proxy_cache_valid 15m;
proxy_cache_key $uri$is_args$args;
}
从上面的配置中可以看出,即使我们chunked_transfer_encoding
off
根据nginx
文档明确设置了这样的路径, haveproxy_buffering
on
和 have a big enough proxy_buffers
size
,响应仍然被分块。
我们在这里缺少什么?
--编辑1:版本信息--
$ nginx -v
nginx version: nginx/1.6.1
$ node -v
v0.10.30
--编辑2:nginx
gzip配置--
# http://nginx.org/en/docs/http/ngx_http_gzip_module.html
gzip on;
gzip_buffers 32 4k;
gzip_comp_level 1;
gzip_min_length 1000;
#gzip_http_version 1.0;
gzip_types application/javascript text/css
gzip_proxied any;
gzip_vary on;