nginx favicon.ico

　　favicon.ico 文件是浏览器收藏网址时显示的图标，当使用浏览器访问页面时，浏览器
会自己主动发起请求获取页面的favicon.ico文件，但是当浏览器请求的favicon.ico文
件不存在时，服务器会记录404日志，而且浏览器也会显示404报错(F12查看浏览器请求情况)

解决方案：

1、不加favicon.ico图片：
服务器不记录访问日志：
　　location = /favicon.ico {
　　　　log_not_found off;                   #文件没发现事件不记录error_log
　　　　access_log off;                        #不记录access_log
　　} 
2、将图标保存到指定目录访问，加favicon.ico图标：
　　#location ~ ^/favicon\.ico$ {
　　location = /favicon.ico {
　　　　root /data/nginx/html/pc/images;
　　}

示例：

在虚拟主机root /data/site14/资源目录加个favicon.ico小图片即可，浏览器Ctrl+F5，F12看结果，或者看访问日志
浏览器F5刷新结果：
{"@timestamp":"2021-03-07T11:03:43+08:00","host":"10.0.0.126","clientip":"10.0.0.1","size":0,"responsetime":0.000,"upstreamtime":"-","upstreamhost":"-","http_host":"www.magedu.org","uri":"/index.html","domain":"www.magedu.org","xff":"-","referer":"-","tcp_xff":"","http_user_agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36","status":"304"} #304是缓存

浏览器Ctrl+F5刷新结果：
{"@timestamp":"2021-03-07T11:03:57+08:00","host":"10.0.0.126","clientip":"10.0.0.1","size":24,"responsetime":0.000,"upstreamtime":"-","upstreamhost":"-","http_host":"www.magedu.org","uri":"/index.html","domain":"www.magedu.org","xff":"-","referer":"-","tcp_xff":"","http_user_agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36","status":"200"}
{"@timestamp":"2021-03-07T11:03:57+08:00","host":"10.0.0.126","clientip":"10.0.0.1","size":571,"responsetime":0.000,"upstreamtime":"-","upstreamhost":"-","http_host":"www.magedu.org","uri":"/favicon.ico","domain":"www.magedu.org","xff":"-","referer":"http://www.magedu.org/","tcp_xff":"","http_user_agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36","status":"404"}