How to create CGI script in bash?

[Mulan]

Hello members, I have created an uncomplicated web hosting registration bash script that creates a innovative user in my web hosting system. Now the predicament is that I want to mechanize it, that user can register themselves from html web form transferring their request to this bash script in cgi-bin directory (or maybe modify this bash script as cgi etc..). So I thought that you guys can explain me how to create CGI script in bash? Please provide some helpful solution fast.

[Katty]

You have to give execute permission, and then be called from the browser :
http://localhost/cgi-bin/gcgil
file: / usr / lib / cgi-bin / gcgil
The following code would be useful for you :

#! / Bin / bash 

# Set the following variable to the name you want. 
# It will be the script directory. 
SCRIPTDIR = "script.cgi" 
SCRIPTBASE = "ligcg.cf" 
EXT = ". Cf" 

# Far from be directed to an administrator ... 
# 
if [[$ (EUID) == 0]]; Then 
echo "You should not use the Administrator!" echo 
exit 
fi 

# Functions 
#################### 

# UserStdOut 
# 
# No parameters. To differentiate between two users, 
# The shell and the webserver 
# 
# End if a wrong call from the browser. 

(userStdOut function 
if ["$ NOCGI GATEWAY_INTERFACE" = "NOCGI"]; Then 
# Normal output of characters per console 
SCRIPTUID = 2 
else 
if ["/ $ SCRIPTDIR"! = "$ PATH_INFO"] & & \ 
[! -F "$ (SCRIPTDIR) / $ (SCRIPTBASE)"]; Then 
set-f 
echo 'Content-type: text / plain; charset = "UTF-8"'; echo 
if ["$ PATH_INFO NOWD" = "NOWD"]; Then 
echo "Corrects URL: http:// $ SERVER_NAME $ SCRIPT_NAME / $ SCRIPTDIR" 
else 
echo "This ... SCRIPTDIR only $ () / $ (SCRIPTBASE) has" \ 
"Authority to perform this action:))" 
fi 
exit 
else 
SCRIPTUID = 1 
fi 
fi 
) 


# If the file cgibin / bincgi not exist, create the function which will replace 
# Temporarily that there Epera find. 
# 

if [-f $ SCRIPTDIR / $ SCRIPTBASE] Then 
SCRIPTDIR $ source / $ SCRIPTBASE 
else 
(start function 
in case $ SCRIPTUID 
1) echo 'Content-type: text / plain; charset = "UTF-8"'; echo 
cat <<_eOt_ 
Script Initializing ... 

_eOt_ 
;; # This is the web server by. Need a notice that we do.; 
2) clear 
NOP = $ '\ X1B [0; 0m' 
ROJ = $ '\ X1B [31; 01m' 
BLA = $ '\ X1B [0; 01m' 
VER = $ '\ X1B [32, 01m' 
cat <<_eOt_ 
JRO $ (hello) $ (USER) $ (NOP) 

're running this script ($ (VER) $ (basename $ 0) $ (NOP)) from a console 
$ (BLA) $ (TERM) $ (VER) $ (tty) $ (NOP) 
but is designed to run as \ 
CGI $ (VER) $ (NOP) and show it through web browser. 

You put it in the directory of your cgi $ (BLA) $ (NOP)'s usually 
$ (VER) / usr / lib / cgi-bin 
/ Var / www / cgi-bin 
NOP ...${) 
and call it from the browser, for example 
Http://localhost/cgi-bin/ $ (VER) $ (basename $ 0) 
http:// $ (uname-n) / cgi-bin / $ (basename $ 0) $ (NOP) 

See you in the browser ... 
_eOt_ 
echo 
exit 
;; # Final output to the console:)) 
esac 

if [-d $ SCRIPTDIR] Then 
echo "Directory $ SCRIPTDIR echo there :))"; 
if [! -W $ SCRIPTDIR] Then 
echo "but you must have write permission to $ (whoami)"; echo 
echo "~ $ sudo chown $ (whoami): $ (GID) $ (dirname $ 0) / $ (SCRIPTDIR) 
echo "although you can continue" 
fi 
else 
echo "You need to create the directory $ (dirname $ 0) / $ (SCRIPTDIR)" echo 
echo "for this from a console running" 
echo "~ $ sudo mkdir $ (dirname $ 0) / $ (SCRIPTDIR) 
echo "~ $ sudo chown $ (whoami): $ (GID) $ (dirname $ 0) / $ (SCRIPTDIR) 
fi 

echo, echo "finally located the file: \" $ SCRIPTDIR / $ SCRIPTBASE \ "" 
echo "to complete the installation" echo 

echo "$ (basename $ 0) to $ (whoami): Bye" 
) 
fi 

userStdOut 
start 

exit

[Praetor]

I think that you should also know about the Modules. The development of modules is very simple, follow rules, they must have the extension .Cf and contain a main function and two descriptions. The functions start with the file name without extension, for example create a test module called test.cf this must contain the main function :

test_init

and two more that are informative

test_name
test_description

The following functions begin and end the formatted output to the browser :

PersonalDoc "title page" 
initZone 'beginning of a drop zone' 
... 
Endzone 
FinalizaDoc

[MindSpace]

The following code shows, can serve as a template:
file: / usr / lib / cgi-bin / script.cgi / test.cf

(test_init function 
IniciaDoc 'Module testing' 
initZone 'Testing ...' 

echo "This ... testing .. one two, one two ..." 

Endzone 
FinalizaDoc 
) 

(test_name function 
echo "Test Module" 
) 

(test_description function 
echo "test file or template" 
)

[Zecho]

The function variable leeVariable return the value of the variable that is sent through a form with POST method. Below you will find the module shell is also very simple one to understand.

(arxius_init function 
IniciaDoc 'Module Arxius' 
initZone 'File Browser (alpha)' 
if [$ CGI_GETPOST] Then 
="$(( ACT_DIR leeVariable act_dir) | sed-e 's: / [A-Za-z0-9 _,.-]*/ \. \.:: G') " 
fi 

tmpStr = "$ (echo $ (SCRIPT_NAME) | sed-e" s :^/.*/:/:")" 
DIRBE = "$ (echo $ (SCRIPT_FILENAME) | sed-e" s: $ tmpStr ::")" 
tmpStr unset 

if ["$ NOP (echo" $ ACT_DIR "| grep $ DIRBE)" == "NOP"] Then 
ACT_DIR = "$ DIRBE" 
fi 

echo "<span style=\"color: yellow; font-size: large;\">" \ 
"$ (Echo $ (ACT_DIR = $ DIRBE) | sed-e" s: $ DIRBE: / '| sed-e "s ://:/:")" \ 
"</ Span> <br>" 

cd "$ (ACT_DIR) 

cat <<_eOt_ 
language="JavaScript" <script type="text/javascript"> <! - 
CambiaDir function (otroDir) ( 
document.formArxius.act_dir.value = document.formArxius.act_dir.value + \ 
"/" + OtroDir; 
document.formArxius.submit (); 
) 
--></ Script> 
name="formArxius" <form method="post"> 
<input type="hidden" name="act_dir" value="${ACT_DIR}"> 
</ Form> 
_eOt_ 

(Ls-a | grep-v ~ $) | while read file; do 
if [-d "$ file"]; Then 
if ["$ file"! = "." ]; Then 
if ["$ file"! = ".." -O "$ ACT_DIR"! = "$ DIRBE"]; Then 
echo "<a href=\"javascript:CambiaDir('${archivo}')\"> <span" \ 
"Style = \" color: blue; font-weight: bold; \ "> $ file" \ 
"</ Span> </ a> <br>" 
fi 
fi 
elif [-f "$ file"-o-x "$ file"]; Then 
if ["$ (file $ file | grep text) NOP" \ = "NOP"] Then 
if [-w "$ file"]; Then 
echo "<span style=\"color: white;\"> $ file </ span> <span \ 
"Style = \" font-size: x-small; font-style: italic; \ ">" \ 
[Edit] </ span> <br> " 
else 
echo "<span style=\"color: white;\"> $ file </ span> <span \ 
"Style = \" font-size: x-small; font-style: italic; \ ">" \ 
"[Show] </ span> <br>" 
fi 
else 
echo "$ file <span style = \" font-size: x-small; font-style: "\ 
"Italic, color: yellow \"> bin </ span> <br> " 
fi 
fi 
done 

Endzone 
FinalizaDoc 
) 

(archives_name function 
echo "File Browser" 
) 
(archives_description function 
echo "Browse the directory tree and files on the server" 
)

[jhonybush]

CGI uses two methods to pass data between the browser and the web server, GET and POST. The GET method passes data in the URL and is the method employed here. The web server will pass environment variables into the execution environment of the CGI shell script which also may be used.