How can I add header conditionally in nginx configuration?

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How can I add header conditionally in nginx configuration?

At first I tried like this.

 location / {
      add_header X-TEST-0 always;

      set $true 1;
      if ($true) {
          add_header X-TEST-1 true;
      }

      add_header X-TEST-2 111;
  }    

Although I expected my nginx set all header(X-TEST-0,1,2), it added header only X-TEST-1.

Next I tried like this.

 location / {
      add_header X-TEST-0 always;

      ##set $true 1;
      ##if ($true) {
      ##    add_header X-TEST-1 true;
      ##}

      add_header X-TEST-2 111;
  }    

My nginx added header X-TEST-1 and X-TEST-2 as I expected.

My quastions are...

1. 
   

   How can I add header conditionally?

   
   


2. 
   

   Why does nginx add only X-TEST-1 with my first example above?

   
   

Thanks in advance!

asked 25 secs ago

yazaki

441

How can I add header conditionally in nginx configuration?