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35.5. server

35.5.1. listen

绑定IP地址

			
		listen 80; 相当于0.0.0.0:80监听所有接口上的IP地址
		listen 192.168.0.1 80;
		listen 192.168.0.1:80;
			
		

配置默认主机 default_server

			
	server {
		listen 80;
		server_name acc.example.net;
		...
	}

	server {
		listen 80 default_server;
		server_name www.example.org;
		...
	}
			
		

35.5.2. server_name 配置

35.5.2.1. 默认配置

匹配所有域名

			
	server_name _;
			
			

35.5.2.2. 单域名虚拟主机

			
# cat /etc/nginx/conf.d/images.conf
server {
	listen 80;
	server_name images.example.com;
	
	#charset koi8-r;
	access_log /var/log/nginx/images.access.log main;
	
	location / {
		root /www/images;
		index index.html index.htm;
	}
	
	#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 /usr/share/nginx/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 /scripts$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;
	#}
}
			
			

35.5.2.3. 多个域名绑定

绑定多个域名

			
	server_name images.example.com img1.example.com img2.example.com;
			
			

35.5.2.4. 泛解析主机

使用通配符匹配

			
	server_name *.example.com
	server_name www.*;
			
			

正则匹配

			
	server_name ~^(.+)\.example\.com$;
	server_name ~^(www\.)?(.+)$;
			
			

泛解析主机

			
server {
    listen       80;
    server_name  example.org  www.example.org;
    ...
}

server {
    listen       80;
    server_name  *.example.org;
    ...
}

server {
    listen       80;
    server_name  mail.*;
    ...
}

server {
    listen       80;
    server_name  ~^(?<user>.+)\.example\.net$;
    ...
}			
			
			

35.5.3. location

				location / {
				root /www;
				index index.html index.htm;
				}
			

35.5.3.1. 禁止访问特定目录

location 匹配到特定的 path 将拒绝用户访问。

				
    location ~ /\.ht {
        deny  all;
    }
    
	location ~ ^/(config|include)/ {
		deny all;
		break;
	}
				
			

35.5.3.2. 引用document_root之外的资源

引用document_root之外的资源需要 root 绝对路径指向目标文件夹

				
	location / {
		root /www/example.com/m.example.com;
		try_files $uri $uri/ @proxy;
	}
	location ^~ /module/ {
		root /www/example.com/www.example.com;
	}

	# 下面的写法是错误的,通过error_log 我们可以看到被定为到/www/example.com/m.example.com/module
	location /module/ {
		root /www/example.com/www.example.com;
	}
				
			

35.5.3.3. 处理扩展名

				
    location ~ \.php$ {
        root           /opt/netkiller.cn/cms.netkiller.cn;
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  /opt/netkiller.cn/cms.netkiller.cn$fastcgi_script_name;
        include        fastcgi_params;
    }				
				
			

35.5.3.4. location 中关闭日志

			
        location = /favicon.ico {
                log_not_found off;
                access_log off;
        }
 
        location = /robots.txt {
                allow all;
                log_not_found off;
                access_log off;
        }			
			
			

35.5.3.5. 匹配多个目录

				
    location ~ /(dev|stage|prod) {
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://api.netkiller.cn:8080;
    }				
				
			

35.5.4. root 通过$host智能匹配目录

为每个host创建一个目录太麻烦,

			
	server {
		listen 80;
		server_name www.netkiller.cn news.netkiller.cn bbs.netkiller.cn;
	
		charset utf-8;
		access_log /var/log/nginx/test.access.log main;
	
		location / {
			root /www/netkiller.cn/$host;
			index index.html index.htm;
		}
	}
			
		

处理主机名中的域

			
	server {
		listen 80;
		server_name *.example.com example.com;
		if ($host = 'example.com' ) {
			rewrite ^/(.*)$ http://www.example.com/$1 permanent;
		}
	
		if ( $host ~* (.*)\.(.*)\.(.*)) {
			set $subdomain $1;
			set $domain $2.$3;
		}
	
		root /www/$domain/$subdomain;
		index index.html index.php;
	
		location ~ .*\.(php|shtml)?$ {
			fastcgi_pass 127.0.0.1:9000;
			fastcgi_index index.php;
			include fcgi.conf;
		}
	}
			
		

或者采用这种格式 /www/example.com/www.example.com

				root /www/$domain/$host;
			

更简洁的方法,只需在 /www/下面创建 域名目录即可例如/www/www.example.com

			
server {
	listen 80;
	server_name *.example.com example.com;
	if ($host = 'example.com' ) {
		rewrite ^/(.*)$ http://www.example.com/$1 permanent;
	}
	
	root /www/$host;
	index index.html index.php;
	
	location ~ .*\.(php|shtml)?$ {
		fastcgi_pass 127.0.0.1:9000;
		fastcgi_index index.php;
		include fcgi.conf;
	}
}
			
		

案例

				
server {
    listen       80;
    listen       443 ssl http2;
    server_name  report.netkiller.cn;
    include /etc/nginx/default.d/*.conf;
    access_log /var/log/nginx/report.netkiller.cn.access.log;
    error_log /var/log/nginx/report.netkiller.cn.error.log;

    error_page 497 https://$host$uri?$args;
    if ($scheme = http) {
	    return 301 https://$server_name$request_uri;
    }

    location / {
    	root   /opt/netkiller.cn/report.netkiller.cn;
	    index  index.html;
    }

    location /api/ {
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://dashboard.netkiller.cn:8080/;
    }
    location /file/download { 
        proxy_set_header Host $host; 
        proxy_set_header X-Real-IP $remote_addr; 
        proxy_set_header REMOTE-HOST $remote_addr; 
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
        proxy_pass http://dashboard.netkiller.cn:8080; 
    }
    error_page 404 /404.html;
        location = /40x.html {
    }

    error_page 500 502 503 504 /50x.html;
        location = /50x.html {
    }
}				
				
		

⚠️注意,两个 proxy_pass 的区别:

/api/ 匹配后等效 /api/* = http://dashboard.netkiller.cn:8080/*

/file/download 匹配等效 /file/download/* = http://dashboard.netkiller.cn:8080/file/download/*

35.5.5. alias

root 定位目录,例如 http://www.netkiller.cn/static/neo.js

		
    location ^~ /static/ {
        root /usr/share/nginx/dev/;
        autoindex on;
    }
		
		

定位结果 /usr/share/nginx/dev/static/neo.js

我们不希望出现 static 这层目录,就需要使用 alias 替代 root

		
    location ^~ /static/ {
        alias /usr/share/nginx/dev/;
        autoindex on;
    }
		
		

最终文件路径是 /usr/share/nginx/dev/neo.js

35.5.6. try_files

			
	server {
		listen 80;
		server_name www.example.com example.com;
	
		location / {
			try_files $uri $uri/ /index.php?/$request_uri;
		}
	
		location /example {
			alias /www/example/;
			index index.php index.html;
		}
	
		error_page 500 502 503 504 /50x.html;
			location = /50x.html {
			root /usr/share/nginx/html;
		}
	
		location ~ \.php$ {
			root html;
			fastcgi_pass 127.0.0.1:9000;
			fastcgi_index index.php;
			fastcgi_param SCRIPT_FILENAME /www/example$fastcgi_script_name;
			include fastcgi_params;
		}
	
		location ~ /\.ht {
			deny all;
		}
	}
			
		

35.5.7. SSL 虚拟主机

			
mkdir /etc/nginx/ssl
			
		

cp your_ssl_certificate to /etc/nginx/ssl

			
# HTTPS server
#
server {
	listen 443;
	server_name localhost;
	
	root html;
	index index.html index.htm;
	
	ssl on;
	#ssl_certificate cert.pem;
	ssl_certificate ssl/example.com.pem;
	ssl_certificate_key ssl/example.com.key;
	
	ssl_session_timeout 5m;
	
	ssl_protocols SSLv3 TLSv1;
	ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP;
	ssl_prefer_server_ciphers on;
	
	location / {
		try_files $uri $uri/ /index.html;
	}
}
			
		

configtest

			
$ sudo service nginx configtest
Testing nginx configuration: nginx.
			
		

443 port test

			
$ openssl s_client -connect www.example.com:443
			
		

35.5.8. HTTP2 配置 SSL证书

35.5.8.1. 自颁发证书

创建自颁发证书,SSL有两种证书模式,单向认证和双向认证,下面是单向认证模式。

				
mkdir -p /etc/pki/nginx/private/
cd /etc/pki/nginx/
openssl req -x509 -nodes -days 365 -newkey rsa:4096 -keyout /etc/pki/nginx/private/server.key -out /etc/pki/nginx/server.crt
				
				
			

建议使用域名命名证书

			
openssl req -x509 -nodes -days 365 -newkey rsa:4096 -keyout /etc/nginx/ssl/api.netkiller.cn.key -out /etc/nginx/ssl/api.netkiller.cn.crt

Generating a 4096 bit RSA private key
..........++
..............................................++
writing new private key to '/etc/nginx/ssl/api.netkiller.cn.key'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:CN
State or Province Name (full name) []:Guangdong
Locality Name (eg, city) [Default City]:Shenzhen
Organization Name (eg, company) [Default Company Ltd]:CF
Organizational Unit Name (eg, section) []:CF
Common Name (eg, your name or your server's hostname) []:api.netkiller.cn
Email Address []:netkiller@msn.com

			
			

注意: Common Name (eg, your name or your server's hostname) []:api.netkiller.cn 要跟你的 nginx server_name api.netkiller.cn 一样。

35.5.8.2. spdy

Nginx 配置 spdy

			
upstream api.netkiller.cn {
	#server api1.netkiller.cn:7000;
	#server api2.netkiller.cn backup;
}

server {
	listen 443 ssl spdy;
	server_name api.netkiller.cn;
	
	ssl_certificate /etc/nginx/ssl/api.netkiller.cn.crt;
	ssl_certificate_key /etc/nginx/ssl/api.netkiller.cn.key;
	ssl_session_cache shared:SSL:20m;
	ssl_session_timeout 60m;
	ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
	
	charset utf-8;
	access_log /var/log/nginx/api.netkiller.cn.access.log;
	error_log /var/log/nginx/api.netkiller.cn.error.log;
	
	location / {
		proxy_pass
		http://api.netkiller.cn;
		proxy_http_version 1.1;
		proxy_set_header Host $host;
		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_ignore_client_abort on;
	}
	
	#location / {
	# proxy_pass http://127.0.0.1:7000;
	#}

}
			
			

spdy 是google提出的标准,现在已经归入 http2 标准,Nginx 1.10 之后建议使用 http2 替代 spdy.

35.5.8.3. HTTP2

			
	server {
		listen 443 ssl http2;
	
		ssl_certificate server.crt;
		ssl_certificate_key server.key;
	}
			
			

35.5.8.4. 用户访问 HTTP时强制跳转到 HTTPS

497 - normal request was sent to HTTPS

			
				#让http请求重定向到https请求

	server {
		listen 80;
		error_page 497 https://$host$uri?$args;
		rewrite ^(.*)$ https://$host$1 permanent;
	}
			
			
			
	server {
		listen 80
		listen 443 ssl http2;
	
		ssl_certificate server.crt;
		ssl_certificate_key server.key;
	
		error_page 497 https://$host$uri?$args;
	
		if ($scheme = http) {
			return 301 https://$server_name$request_uri;
		}
	}
			
			

35.5.8.5. SSL 双向认证

生成证书
CA
					
touch /etc/pki/CA/index.txt
echo 00 > /etc/pki/CA/serial
				
制作 CA 私钥
openssl genrsa -out ca.key 2048

制作 CA 根证书(公钥)
openssl req -new -x509 -days 3650 -key ca.key -out ca.crt
					
					
服务器端

服务器端证书

					
制作服务端私钥
openssl genrsa -out server.pem 2048
openssl rsa -in server.pem -out server.key

生成签发请求
openssl req -new -key server.pem -out server.csr	

用 CA 签发
openssl x509 -req -sha256 -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -days 3650 -out server.crt		
					
					
客户端

生成客户端证书

					
openssl genrsa -des3 -out client.key 2048
openssl req -new -key client.key -out client.csr  

生成签发请求
openssl req -new -key server.pem -out server.csr	

用 CA 签发
openssl ca -in client.csr -cert ca.crt -keyfile ca.key -out client.crt -days 3650
					
					
浏览器证书

生成浏览器证书

						openssl pkcs12 -export -inkey client.key -in client.crt -out client.pfx
					
SOAP 证书
						cat client.crt client.key > soap.pem
					
					
	$header = array(		
		'local_cert' => "soap.pem", //client.pem文件路径
		'passphrase' => "passw0rd" //client证书密码
		);
	$client = new SoapClient(FILE_WSDL, $header); 					
					
					
过程演示

例 35.1. Nginx SSL 双向认证,证书生成过程

						
root@VM_7_221_centos /etc/nginx/ssl % openssl genrsa -out ca.key 2048
Generating RSA private key, 2048 bit long modulus
...................................................+++
......................................+++
e is 65537 (0x10001)

root@VM_7_221_centos /etc/nginx/ssl % openssl req -new -x509 -days 3650 -key ca.key -out ca.crt
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:CN
State or Province Name (full name) []:GD
Locality Name (eg, city) [Default City]:Shenzhen
Organization Name (eg, company) [Default Company Ltd]:GW
Organizational Unit Name (eg, section) []:DEV
Common Name (eg, your name or your server's hostname) []:api.netkiller.cn
Email Address []:netkiller@msn.com				
						
						
						
root@VM_7_221_centos /etc/nginx/ssl % openssl genrsa -out server.pem 2048
Generating RSA private key, 2048 bit long modulus
.............+++
........................................................+++
e is 65537 (0x10001)			

root@VM_7_221_centos /etc/nginx/ssl % openssl rsa -in server.pem -out server.key
writing RSA key

root@VM_7_221_centos /etc/nginx/ssl % openssl req -new -key server.pem -out server.csr
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:CN
State or Province Name (full name) []:GD
Locality Name (eg, city) [Default City]:Shenzhen
Organization Name (eg, company) [Default Company Ltd]:GW
Organizational Unit Name (eg, section) []:DEV
Common Name (eg, your name or your server's hostname) []:api.netkiller.cn
Email Address []:netkiller@msn.com

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:

root@VM_7_221_centos /etc/nginx/ssl % openssl x509 -req -sha256 -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -days 3650 -out server.crt
Signature ok
subject=/C=CN/ST=GD/L=Shenzhen/O=GW/OU=DEV/CN=api.netkiller.cn/emailAddress=netkiller@msn.com
Getting CA Private Key	
						
						

Nginx 配置

				
mkdir /etc/nginx/ssl
cp server.crt server.key ca.crt /etc/nginx/ssl
cd /etc/nginx/ssl  
				
				

/etc/nginx/conf.d/api.netkiller.cn.conf

				
server {
    listen       443 ssl;
    server_name  api.netkiller.cn;

    access_log off;

    ssl on;
    ssl_certificate /etc/nginx/ssl/server.crt;
    ssl_certificate_key /etc/nginx/ssl/server.key;
    ssl_client_certificate /etc/nginx/ssl/ca.crt;
    ssl_verify_client on;

    location / {
        proxy_pass http://localhost:8443;
    }
}				
				
				

重启 nginx 服务器

					root@VM_7_221_centos /etc/nginx % systemctl restart nginx
				
测试双向认证

首先直接请求

				
root@VM_7_221_centos /etc/nginx % curl -k https://api.netkiller.cn/
<html>
<head><title>400 No required SSL certificate was sent</title></head>
<body bgcolor="white">
<center><h1>400 Bad Request</h1></center>
<center>No required SSL certificate was sent</center>
<hr><center>nginx</center>
</body>
</html>
				
				

使用证书请求

				
curl --insecure --key client.key --cert ./client.crt:123456  https://api.netkiller.cn
				
				

注意: --cert 参数需要写入路径和密码

35.5.9. expires

expires 格式

例 35.2. Expires Examples

				
		expires 1 January, 1970, 00:00:01 GMT;
		expires 60s;
		expires 30m;
		expires 24h;
		expires 1d;
		expires max;
		expires off;
	
		expires 24h;
		expires modified +24h;
		expires @15h30m;
		expires 0;
		expires -1;
		expires epoch;
		add_header Cache-Control private;
				
			

注意:expires仅仅适用于200, 204, 301, 302,304


单个文件匹配

			
	location ~* \.css$ {
		expires 30d;
	}
			
		

扩展名匹配

			
	#图片类资源缓存5天,并且不记录请求日志
	location ~ .*\.(ico|gif|jpg|jpeg|png|bmp|swf)$
	{
		expires 5d;
		access_log off;
	}

	#css/js 缓存一天,不记录请求日志
	location ~ .*\.(js|css)$
	{
		access_log off;
		expires 1d;
		add_header Pragma public;
		add_header Cache-Control "public";
	}
			
		
			
	location ~ .*\.(htm|html|gif|jpg|jpeg|png|bmp|swf|ioc|rar|zip|txt|flv|mid|doc|ppt|pdf|xls|mp3|wma)$
	{
		expires 30d;
	}
	location ~ .*\.(js|css)$
	{
		expires 1h;
	}
			
		
			
		location ~* \.(js|css|jpg|jpeg|gif|png|swf)$ {
			if (-f $request_filename) {
				expires 1h;
				break;
			}
		}

		location ~* \.(jpg|jpeg|gif|css|png|js|ico)$ {
			expires max;
		}

		#cache control: all statics are cacheable for 24 hours
		location / {
			if ($request_uri ~* \.(ico|css|js|gif|jpe?g|png)$) {
				expires 72h;
				break;
			}
		}
			
		

例 35.3. nginx expires

				
	location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|ico)$ {
		expires 1d;
		access_log off;
	}

	location ~ .*\.(js|css)$ {
		expires 1d;
		access_log off;
	}
	location ~ .*\.(html|htm)$
	{
		expires 1d;
		access_log off;
	}
				
			

35.5.9.1. 通过 add_header / more_set_headers 设置缓存

add_header 实例

				
	location ~* \.(?:ico|css|js|gif|jpe?g|png)$ {
		expires 30d;
		add_header Pragma public;
		add_header Cache-Control "public";
	}
				
			

more_set_headers 实例

				
	location ~ \.(ico|pdf|flv|jp?g|png|gif|js|css|webp|swf)(\.gz)?(\?.*)?$ {
		more_set_headers 'Cache-Control: max-age=86400';
		...
		proxy_cache_valid 200 2592000;
		...
	}
				
			

s-maxage 作用于 Proxy

				
	location ~ \.(ico|pdf|flv|jp?g|png|gif|js|css|webp|swf)(\.gz)?(\?.*)?$ {
		more_set_headers 'Cache-Control: s-maxage=86400';
	}
				
			

35.5.9.2. $request_uri

				
		if ($request_uri ~* "\.(ico|css|js|gif|jpe?g|png)\?[0-9]+$") {
			expires max;
			break;
		}
				
			

下面例子是缓存 /detail/html/5/4/321035.html, 但排除 /detail/html/5/4/0.html

				
	if ($request_uri ~ ^/detail/html/[0-9]+/[0-9]/[^0][0-9]+\.html ) {
		expires 1d;
	}
				
			

35.5.9.3. $request_filename

				
	if (-f $request_filename) {
		expires 1d;
	}
				
			

35.5.10. access

			
	#防止access文件被下载
	location ~ /\.ht {
		deny all;
	}
			
		
			
	location ~ ^/upload/.*\.php$
	{
		deny all;
	}

	location ~ ^/static/images/.*\.php$
	{
		deny all;
	}
			
		
			
	location ~ /\.ht {
		deny all;
	}

	location ~ .*\.(sqlite|sq3)$ {
		deny all;
	}
			
		

IP 地址

			
		location / {
			deny 192.168.0.1;
			allow 192.168.1.0/24;
			allow 10.1.1.0/16;
			allow 2001:0db8::/32;
			deny all;
		}
			
		

限制IP访问*.php文件

			
	location ~ ^/private/.*\.php$
	{
		allow 222.222.22.35;
		allow 192.168.1.0/249;
		deny all;
	}
			
		

35.5.11. autoindex

开启目录浏览

			
# vim /etc/nginx/sites-enabled/default

location / {
	autoindex on;
}
			
		
			
# /etc/init.d/nginx reload
Reloading nginx configuration: nginx.
			
		

另外Nginx的目录流量有两个比较有用的参数,可以根据自己的需求添加:

			
autoindex_exact_size off;
默认为on,显示出文件的确切大小,单位是bytes。
改为off后,显示出文件的大概大小,单位是kB或者MB或者GB

autoindex_localtime on;
默认为off,显示的文件时间为GMT时间。
改为on后,显示的文件时间为文件的服务器时间			
			
		

35.5.12. return

301 跳转

		
	server {
		listen 80;
		server_name m.example.com;

		location / {
			return 301 $scheme://www.example.com$request_uri;
		}
	}

	server {
		listen 80;
		listen 443 ssl;
		server_name www.old-name.com;
		return 301 $scheme://www.new-name.com$request_uri;
	}
		
		

35.5.13. add_header

35.5.13.1. Cache

# 相关页面设置Cache-Control头信息

			
	if ($request_uri ~* "^/$|^/news/.+/|^/info/.+/") {
		add_header Cache-Control max-age=3600;
	}

	if ($request_uri ~* "^/suggest/|^/categories/") {
		add_header Cache-Control max-age=86400;
	}
			
			
				
add_header     Nginx-Cache     "HIT  from  www.example.com";
or
add_header     Nginx-Cache     "$upstream_cache_status  from  www.example.com";
				
			

35.5.13.2. Access-Control-Allow

				
		location ~* \.(eot|ttf|woff)$ {
			add_header Access-Control-Allow-Origin *;
		}

		location /js/ {
			add_header Access-Control-Allow-Origin https://www.mydomain.com/;
			add_header Access-Control-Allow-Methods GET,OPTIONS;
			add_header Access-Control-Allow-Headers *;
		}
				
			
				
	location / {
		if ($request_method = OPTIONS ) {
			add_header Access-Control-Allow-Origin "http://example.com";
			add_header Access-Control-Allow-Methods "GET, OPTIONS";
			add_header Access-Control-Allow-Headers "Authorization";
			add_header Access-Control-Allow-Credentials "true";
			add_header Content-Length 0;
			add_header Content-Type text/plain;
			return 200;
		}
	}
				
			

允许 所有头部 所有域 所有方法

				
server {
	...
	location / {
		add_header 'Access-Control-Allow-Origin' '*';
		add_header 'Access-Control-Allow-Headers' '*';
		add_header 'Access-Control-Allow-Methods' '*';
		# OPTIONS 直接返回204
		if ($request_method = 'OPTIONS') {
			return 204;
		}
	}
	...
}				
				
			

使用 $http_origin 变量

				
add_header 'Access-Control-Allow-Origin' $http_origin;
add_header 'Access-Control-Allow-Credentials' 'true';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,web-token,app-token,Authorization,Accept,Origin,Keep-Alive,User-Agent,X-Mx-ReqToken,X-Data-Type,X-Auth-Token,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
if ($request_method = 'OPTIONS') {
	add_header 'Access-Control-Max-Age' 1728000;
	add_header 'Content-Type' 'text/plain; charset=utf-8';
	add_header 'Content-Length' 0;
	return 204;
}				
				
			

35.5.14. client_max_body_size 上传文件尺寸限制

			
client_max_body_size 2M;