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简单谈谈favicon,简单favicon
Home Backend Development PHP Tutorial Let's talk briefly about favicon, simple favicon_PHP tutorial

Let's talk briefly about favicon, simple favicon_PHP tutorial

Jul 13, 2016 am 09:51 AM

简单谈谈favicon,简单favicon

favicon.ico介绍

favicon.ico是个什么东西呢,也许见得太多都习以为常了(我就是这样,直到写这篇文章之前才知道),看看维基百科的解释:

复制代码 代码如下:
Favicon是favorites icon的缩写,亦被称为website icon(网页图标)、page icon(页面图标)或urlicon(URL图标),下面是链接 http://zh.wikipedia.org/wiki/Favicon

其实说白了就是这个东西,大部分网站都会在打开的浏览器tab最左侧显示这个小图标,这个就是favicon.ico

这个图标怎么设置的呢,有多少同学跟我一样对这个小细节习以为常了,但是不清楚怎么设置举个手(这里检讨下自己,有好多细节东西把脸都能碰肿,但我却不真正的了解他,更可怕的是我的潜意识里认为我了解他......)。

favicon设置

这个怎么设置呢,设置方法很简单,有两种法子:

默认放置在服务器根目录下面

就是将文件命名为favicon.ico并放在网站根目录下就可以,浏览器会自动方请求去获取http://host/favicon.ico,这个请求在浏览器中通过F12是看不到的,需要借助其他工具(比如说Fiddler)去看,或者打开服务器访问日志,比如我这个,nginx日志中会显示网页图标请求
"13/May/2015:16:07:31 +0800" "192.168.X.X" "test.test.com" "200" "GET /favicon.ico HTTP/1.1" "4409" ......

通过link标签修正网页图标位置和名称

这种方法就是通过html的link标签设置网页图表的位置和名称,就像下面这样
<link href="favicon_baoman.ico" type="image/x-icon" rel="icon">

注意点

浏览器会缓存图标的信息,firefox我试了下是每隔一段时间(2分钟左右)就会请求一次favicon,chrome要删除数据才可以重新请求~~

这个有什么影响呢

发现这个问题是因为PHP框架,PHP框架通过pathinfo去解析路由,路由方式为【mod/controller.method】,如果不匹配的话就记录日志并返回404,我访问一个正确的路径也会报错说是路由不存在,但是接口返回是ok的,访问一个错误的路由会记录两条错误日志,这个是怎么回事呢,下面是我的nginx配置

 server {
   listen  80;
   server_name test.test.com;

   location / {
     root /export/adsz/boss/php/sphp;
     fastcgi_pass  127.0.0.1:9000;
     fastcgi_index  index.php;
     fastcgi_split_path_info ^((&#63;U).+\.php)(/&#63;.+)$;
     fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
     fastcgi_param PATH_INFO $fastcgi_path_info;
     include fastcgi_params;
     rewrite ^/(.*)$  /index.php/$1 break;
   }
 }

Copy after login

nginx配置导致了这个问题的存在,浏览器请求一个接口的时候,会默认带上http://test.test.com/favicon.ico,这个时候报出路由错误就想的通了,浏览器发出两条请求,一条使我们想要的,另一条就是这个ico网页图标请求,这个问题解决方法也很简单,只需要在配置中添加这个图表或者将favicon请求定位到其他地方:

 server {
   listen  80;
   server_name test.test.com;
  location = /favicon.ico {
    root /wwroot/public/images/;
  }
   location / {
     root /wwroot/;
     fastcgi_pass  127.0.0.1:9000;
     fastcgi_index  index.php;
     fastcgi_split_path_info ^((&#63;U).+\.php)(/&#63;.+)$;
     fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
     fastcgi_param PATH_INFO $fastcgi_path_info;
     include fastcgi_params;
     rewrite ^/(.*)$  /index.php/$1 break;
   }
 }
Copy after login

总结

找到这个原因并修改后,我又仔细看了看nginx配置,发现其他虚拟主机都有配置这个favicon.ico的匹配规则!囧。。。,总结下,就是要多看看,多想想为什么,不要对很多东西失去兴趣、见怪不怪

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