openresty禁用304 Not Modified

女爷i 2022-07-16 13:19 159阅读 0赞

**先看一段代码：**

worker_processes  1;
    error_log logs/error.log;
    events {
        worker_connections 1024;
    }
    
    http {
    
        log_format  main  '$msec $status $request $request_time '
                          '$http_referer $remote_addr [ $time_local ] '
                          '$upstream_response_time $host $bytes_sent '
                          '$request_length $upstream_addr';
    
        access_log  logs/access.log main buffer=32k flush=1s;
    
    
        server {
            listen 80;
    
            location / {
                content_by_lua '
                    ngx.header["Content-Type"] = "text/html"
                    ngx.header["Etag"] = "663b92165e216225df78fbbd47c9c5ba"
                    ngx.header["Last-Modified"] = "Fri, 12 May 2016 18:53:33 GMT"
                    local data = "hello world"
                    ngx.status = ngx.HTTP_OK
                    ngx.print(data)
                    ngx.exit(ngx.HTTP_OK)
                ';
                expires 24h;
                #if_modified_since off;
            }
    
        }
    
    }

**在浏览器多次运行结果：**

![SouthEast][]

**分析：**

虽然显式的设置了响应码HTTP 200，但是nginx默认会开启304的判断(如果浏览器把**If-Modified-Since和If-None-Match**带上来)，

如果不需要内置304响应，则可以选择禁用：

Syntax:	if_modified_since off | exact | before;
    Default:	
    if_modified_since exact;
    Context:	http, server, location
    This directive appeared in version 0.7.24.

原文出自：[http://blog.csdn.net/daiyudong2020/article/details/53224470][http_blog.csdn.net_daiyudong2020_article_details_53224470]

End;

[SouthEast]: /images/20220715/f1ce7f5281ee4044ba9ff9ec8c3c2bd9.png
[http_blog.csdn.net_daiyudong2020_article_details_53224470]: http://blog.csdn.net/daiyudong2020/article/details/53224470