我们在使用Nginx搭建HTTP的web server的过程中，一般都很顺利，默认的网站根目录一般是/usr/local/nginx/html，我们也可以正常访问到Nginx的欢迎信息，比如使用下面的网址：

http://localhost/

但是发现运行一段时间后，Nginx的error日志中会定期抱怨说，没有找到favicon.ico文件？

发生这种错误的原因一般是Nginx在根目录上找不到这个文件。我们可以在网上下载一个ico文件放在根目录下面就可以了。但是现在的业务场景有些区别：

我使用Nginx作为前台服务器，在80端口接收所有的http请求，对本地能缓存的资源直接提供服务，否则转发到upstream上的其他服务器处理，比如转给fastDFS，或者是ATS等等，下面的nginx.conf是一个例子：

user  www www;
worker_processes  4;error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;pid        logs/nginx.pid;
worker_rlimit_nofile 65535;
google_perftools_profiles /tmp/tcmalloc;events {worker_connections  65535;
}http {include       mime.types;default_type  application/octet-stream;server_tokens off;log_format  main  '$remote_addr - $remote_user [$time_local] "$request" ''$status $body_bytes_sent "$http_referer" ''"$http_user_agent" "$http_x_forwarded_for"';#access_log  logs/access.log  main;server_names_hash_bucket_size 128;client_header_buffer_size 32k;large_client_header_buffers 4 32k;client_max_body_size 50m;sendfile        on;tcp_nopush      on;tcp_nodelay     on;#keepalive_timeout  0;keepalive_timeout  60;fastcgi_connect_timeout 300;fastcgi_send_timeout 300;fastcgi_read_timeout 300;fastcgi_buffer_size 64k;fastcgi_buffers 4 64k;fastcgi_busy_buffers_size 128k;fastcgi_temp_file_write_size 256k;fastcgi_intercept_errors on;gzip  on;gzip_min_length 1k;gzip_buffers 4 16k;gzip_http_version 1.0;gzip_comp_level 2;gzip_types text/plain application/x-javascript text/css application/xml;gzip_vary on;upstream ats {server 127.0.0.1:8081;}server {listen       80;server_name  localhost;#charset koi8-r;#access_log  logs/host.access.log  main;location / {root   html;index  index.html index.htm;proxy_pass http://ats$request_uri;proxy_set_header Host $host;proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;expires 2h;}#error_page  404              /404.html;# redirect server error pages to the static page /50x.html#error_page   500 502 503 504  /50x.html;location = /50x.html {root   html;}location /test-js {root html;try_files $uri /;expires 10d;}location /test-img {root html;try_files $uri /;expires 10d;}location /test-html {root html;try_files $uri /;expires 10d;}# just use for taoyx testlocation /taoyx-test {root html;}# just for tulu testlocation /tulu {root html;}# proxy the PHP scripts to Apache listening on 127.0.0.1:80##location ~ .php$ {#    proxy_pass   http://127.0.0.1;#}# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000#location ~ .php$ {root           html;fastcgi_pass   127.0.0.1:9000;fastcgi_index  index.php;fastcgi_param  SCRIPT_FILENAME  /usr/local/nginx/html$fastcgi_script_name;include        fastcgi_params;}# deny access to .htaccess files, if Apache's document root# concurs with nginx's one##location ~ /.ht {#    deny  all;#}}# another virtual host using mix of IP-, name-, and port-based configuration##server {#    listen       8000;#    listen       somename:8080;#    server_name  somename  alias  another.alias;#    location / {#        root   html;#        index  index.html index.htm;#    }#}# HTTPS server##server {#    listen       443;#    server_name  localhost;#    ssl                  on;#    ssl_certificate      cert.pem;#    ssl_certificate_key  cert.key;#    ssl_session_timeout  5m;#    ssl_protocols  SSLv2 SSLv3 TLSv1;#    ssl_ciphers  HIGH:!aNULL:!MD5;#    ssl_prefer_server_ciphers   on;#    location / {#        root   html;#        index  index.html index.htm;#    }#}}

我现在在根目录下存放一个ico文件，如何让Nginx直接去本地拿这个文件，而不转发给其他服务器呢？直接在nginx.conf中增加下面一行就可以了：

        # set site faviconlocation /favicon.ico {root html;}

下面按照我的配置，访问Nginx的欢迎页面就可以正常看到ico图标了：