我正在寻找一种基于给定模式对{}之间的线段进行grep的方法。我尝试了在google中找到的各种模式,但这些模式都无济于事。我在regex中不是专业人士。解决这个问题。
这是示例源文件:

Data {
        status 400;
        server_name test.dummy.com;

        location /test {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_read_timeout 5m;
proxy_send_timeout 5m;
proxy_pass http://xyz.9201.com;

               proxy_http_version 1.1;
               proxy_set_header Upgrade $http_upgrade;
               proxy_set_header Connection "upgrade";
        }

        location /dev {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_read_timeout 5m;
proxy_send_timeout 5m;
proxy_pass http://xyz.9202.com;

               proxy_http_version 1.1;
               proxy_set_header Upgrade $http_upgrade;
               proxy_set_header Connection "upgrade";
        }

        location /prd {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_read_timeout 5m;
proxy_send_timeout 5m;
proxy_pass http://xyz.9203.com;

               proxy_http_version 1.1;
               proxy_set_header Upgrade $http_upgrade;
               proxy_set_header Connection "upgrade";
        }
}

如果传递给脚本的参数为“dev”,则应匹配位置/dev模式,并将以下block提取到shell变量中:

位置/dev {



我尝试了各种sed/awk命令模式,但是下面的这个给了我一些最接近的结果。
awk '/dev/{print}' RS={ FS=} test.conf

结果:
$ awk '/dev/{print}' RS={ FS=} test.txt

proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_read_timeout 5m;
proxy_send_timeout 5m;
proxy_pass http://xyz.9201.com;

               proxy_http_version 1.1;
               proxy_set_header Upgrade $http_upgrade;
               proxy_set_header Connection "upgrade";
        }

        location /dev

最佳答案

我们可以在一个awk本身中完成此操作,请尝试以下操作。

awk '/}/ && found{exit} /location \/dev/{found=1;next} found && NF' Input_file

由于OP提到只应打印第一套,所以我在这里使用exit在拳套打印后立即退出。

说明:添加以上代码的说明。
awk '                   ##Starting awk program from here.
/}/ && found{           ##Checking condition if a line contains } AND variable found is SET then do following.
  exit                  ##Exiting from program here.
}                       ##Closing BLOCK for above condition here.
/location \/dev/{       ##Checking condition here if a line contains location /dev then do following.
  found=1               ##Setting variable found to 1 here.
  next                  ##next will skip all further statements from here.
}                       ##Closing BLOCK for above condition here.
found && NF             ##Checking condition is  found is SET and NF is NOT NULL then print current line.
' Input_file            ##Mentioning Input_file name here.

输出如下。
proxy_set_header X-Forwarded-Host ;
proxy_set_header X-Forwarded-Server ;
proxy_set_header X-Forwarded-For ;
proxy_set_header Host ;
proxy_read_timeout 5m;
proxy_send_timeout 5m;
proxy_pass http://xyz.9202.com;
               proxy_http_version 1.1;
               proxy_set_header Upgrade ;
               proxy_set_header Connection "upgrade";

关于linux - 根据匹配模式将一行代码grep到shell变量中,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/59218263/

10-10 14:08
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