Host header in OpenResty

host.t

use Test::Nginx::Socket::Lua 'no_plan';

run_tests();

__DATA__

=== TEST 1: failing test
--- config
resolver 1.1.1.1;
location = /t {
  set $original_host "";
  set $backend "ec2-54-87-144-63.compute-1.amazonaws.com";
  proxy_pass http://$backend/upstream;
  proxy_set_header Host $http_host;
  proxy_set_header Original-Host $original_host;
  access_by_lua_block {
    ngx.var.original_host = ngx.var.http_host
    ngx.req.set_header('Host', ngx.var.backend)
  }
}
--- request
GET /t
--- more_headers
Host: original
--- error_code: 200
--- response_body_like
.*Host: ec2-54-87-144-63.compute-1.amazonaws.com[\r\n]+Original-Host: original.*

=== TEST 2: passing test
--- config
resolver 1.1.1.1;
location = /t {
  set $original_host "";
  set $backend "ec2-54-87-144-63.compute-1.amazonaws.com";
  proxy_pass http://$backend/upstream;
  proxy_set_header Host $http_host;
  proxy_set_header Original-Host $original_host;
  access_by_lua_block {
    ngx.var.original_host = ngx.req.get_headers()['Host']
    ngx.req.set_header('Host', ngx.var.backend)
  }
}
--- request
GET /t
--- more_headers
Host: original
--- error_code: 200
--- response_body_like
.*Host: ec2-54-87-144-63.compute-1.amazonaws.com[\r\n]+Original-Host: original.*