curl --help 내용중
--resolve <host:port:address> Resolve the host+port to this address
*. port 를 0으로 할 경우 모든 포트로 IP변경 가능
=> 이거 잘못됨. 안되더라.
--resolve <host:port:address[,address]...>
Provide a custom address for a specific host and port pair.
Using this, you can make the curl requests(s) use a specified
address and prevent the otherwise normally resolved address to
be used. Consider it a sort of /etc/hosts alternative provided
on the command line. The port number should be the number used
for the specific protocol the host will be used for. It means
you need several entries if you want to provide address for the
same host but different ports.
The provided address set by this option will be used even if -4,
--ipv4 or -6, --ipv6 is set to make curl use another IP version.
Support for providing the IP address within [brackets] was added
in 7.57.0.
Support for providing multiple IP addresses per entry was added
in 7.59.0.
This option can be used many times to add many host names to
resolve.
Added in 7.21.3.
-------=--------
테스트
www.naver.com는 223.130.200.104, 223.130.200.107 의 두개의 IP를 가짐(라운드 로빈 DNS)
즉, 저 두 IP중 랜덤으로 접속 됨.
이를 임의로 IP고정 접속해서 가져오도록 하는 방법
$ curl --resolve www.naver.com:443:223.130.200.107 https://www.naver.com|wc -l
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 205k 0 205k 0 0 3504k 0 --:--:-- --:--:-- --:--:-- 3550k
3222
=> OK
$ curl --resolve www.naver.com:443:223.130.200.104 https://www.naver.com|wc -l
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 205k 0 205k 0 0 3307k 0 --:--:-- --:--:-- --:--:-- 3376k
3223
=> OK
$ curl --resolve www.naver.com:443:127.0.0.1 https://www.naver.com|wc -l
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:00:02 --:--:-- 0
curl: (7) Failed to connect to www.naver.com port 443 after 2036 ms: Connection refused
0
=> ERROR
로컬로 www.naver.com 으로 요청해서 에러남. 아파치를 띄우고 www.naver.com 을 설정해 놨다면 응답을 할 것임.
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테스트 할 때 hosts 파일을 수정 안하고 테스트 할 수 있다는 이야기.