nginx中break和last的区别

一、环境准备

资源文件创建

mkdir -p /opt/tmp/wqy/test/aaa
mkdir -p /opt/tmp/wqy/test/bbb
echo "aaa" >> /opt/tmp/wqy/test/aaa/index.html
echo "bbb" >> /opt/tmp/wqy/test/bbb/index.html

二、测试过程

2.1、初始配置时

nginx配置

server {
    listen 80;
    server_name wqy.test.com;
    access_log logs/wqy-test-com/access.log;
    location ^~ /aaa {
        root /opt/tmp/wqy/test;
    }
    location ^~ /bbb {
        return 200 "hello world\n";
    }
}

测试结果

#curl -s http://wqy.test.com/aaa/index.html -x 127.0.0.1:80
aaa
#curl -s http://wqy.test.com/bbb/index.html -x 127.0.0.1:80
hello world

2.2、配置rewrite last时

nginx配置

server {
    listen 80;
    server_name wqy.test.com;
    access_log logs/wqy-test-com/access.log;
    location ^~ /aaa {
        rewrite ^/aaa/(.*) /bbb/$1 last;
        root /opt/tmp/wqy/test;
    }
    location ^~ /bbb {
        return 200 "hello world\n";
    }
}

测试结果

#curl -s http://wqy.test.com/aaa/index.html -x 127.0.0.1:80
hello world
#curl -s http://wqy.test.com/bbb/index.html -x 127.0.0.1:80
hello world

url由重写前的http://wqy.test.com/aaa/index.html变为http://wqy.test.com/bbb/index.html，重新进行location匹配后，匹配到第二个location条件，所以请求url得到的响应是hello wold

测试结论

配置rewrite last时，请求跳出当前location，进入server块，重新进行location匹配，超过10次匹配不到报500错误。客户端的url不变

2.3、配置rewrite break时

nginx配置

server {
    listen 80;
    server_name wqy.test.com;
    access_log logs/wqy-test-com/access.log;
    location ^~ /aaa {
        rewrite ^/aaa/(.*) /bbb/$1 break;
        root /opt/tmp/wqy/test;
    }
    location ^~ /bbb {
        return 200 "hello world\n";
    }
}

测试结果

#curl -s http://wqy.test.com/aaa/index.html -x 127.0.0.1:80
bbb
#curl -s http://wqy.test.com/bbb/index.html -x 127.0.0.1:80
hello world

url由重写前的http://wqy.test.com/aaa/index.html变为http://wqy.test.com/bbb/index.html，nginx按照重写后的url进行资源匹配，匹配到的资源文件是/opt/tmp/wqy/test/bbb/index.html，所以请求url得到的响应就是/opt/tmp/wqy/test/bbb/index.html文件中的内容：bbb。

测试结论

配置rewrite break时，请求不会跳出当前location，但资源匹配会按照重写后的url进行，如果location里面配置的是proxy_pass到后端，后端服务器收到的请求url也会是重写后的url。客户端的url不变。