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dam2k/test.cgi

Last active February 18, 2021 18:10
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Bash CGI HTTP Status code example
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test.cgi
#!/bin/bash
function sendcontentheader()
{
printf 'Content-Type: %s\n' "$1"
}
function sendstatuscode()
{
printf 'Status: %s\n' "$1"
}
function endheaders()
{
printf '\n'
}
function sendbody()
{
printf '<html>\n'
printf '<head><title>HI!</title></head>'
printf "<body><h2>Hi there, this is <b>$(basename $0)</b> speaking.<h2><h3>HTTP Status code: $1</h3</body>\n"
printf '</html>\n'
}
# ------- Main program body ----------
sendcontentheader 'text/html'
SC='410 Gone'
sendstatuscode "$SC"
endheaders
sendbody "$SC"
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dam2k commented Feb 18, 2021 •
edited

The code is super simple, does not require any dependency and is auto explicative.

There are 4 functions that are implemented at the beginning of the script: sendcontentheader() and sendstatuscode() send only a single header to stdout, endheaders() send newline character to end the response headers and begin the body section, sendbody() write some html to stdout.

The function that sends the HTTP Status code header is sendstatuscode().

Also, try to directly exec the script from command line to get the output, that is:

dino@a1:/tmp# chmod 755 test.cgi
dino@a1:/tmp# ./test.cgi
Content-Type: text/html
Status: 410 Gone

<html>
<head><title>HI!</title></head><body><h2>Hi there, this is <b>test.cgi</b> speaking.<h2><h3>HTTP Status code: 410 Gone</h3</body>
</html>

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