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@LozanoMatheus
Last active August 24, 2023 13:24
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A simple request - HTTP request with native Bash and without curl/wget/*
#!/usr/bin/env bash +x
## Do you need to test your exposed app but you don't have curl/wget/* installed?
## The ":" is a built-in command and it works similar to true. Let's say, ":" is more portable than "true"
## Simple and easy
:> /dev/tcp/localhost/22
## Why using timeout? If any side has a firewall and it's dropping the packages, the request will take ~80 seconds to get the timeout.
## Let's try first with Google :D
## In this case, we don't have output, but the return code will be 0
timeout 10s bash -c ':> /dev/tcp/google.com/443'
## Return code
0
## Now let's try locally. With return code 1
timeout 10s bash -c ':> /dev/tcp/localhost/443'
## Output
bash: connect: Cannot assign requested address
bash: /dev/tcp/localhost/443: Cannot assign requested address
## Return code
1
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