busybox的httpd使用CGI脚本(BusyBox httpd CGI scripts)

1. BusyBox httpd CGI scripts

The http daemon expects that CGI script is in subdirectory cgi-bin under main web directory set by options -h (default /www and CGI in /www/cgi-bin). CGI script must have permision for execute (min mode 700).

1.1. CGI

Standard set of Comon Gateway Interface environment variable are :

CONTENT_TYPE=application/x-www-form-urlencoded
GATEWAY_INTERFACE=CGI/1.1
REMOTE_ADDR=192.168.1.180
QUERY_STRING=Zbr=1234567&SrceMB=&ime=jhkjhlkh+klhlkjhlk+%A9%D0%C6%AE%C6%AE&prezime=&sektor=OP
REMOTE_PORT=2292
CONTENT_LENGTH=128
REQUEST_URI=/cgi-bin/test
SERVER_SOFTWARE=busybox httpd/1.35 6-Oct-2004
PATH=/bin:/sbin:/usr/bin:/usr/sbin
HTTP_REFERER=
SERVER_PROTOCOL=HTTP/1.0
PATH_INFO=
REQUEST_METHOD=POST
PWD=/www/cgi-bin
SERVER_PORT=80
SCRIPT_NAME=/cgi-bin/test
REMOTE_USER=[http basic auth username]

/cgi-bin/test

#!/bin/sh
echo "Content-type: text/html"
echo ""
echo ""
echo ""
echo "
"
env
echo "
"
echo "
"

Environment variables are set up and the script is invoked with pipes for stdin/stdout.

1.2. HTML Forms

If a post is being done the script is fed the POST data in addition to setting the QUERY_STRING variable (for GETs or POSTs).

Prefered way to do forms in CGI is POST.

1.2.1. POST

Example how to use POST in form.

/www/form-post.html

  
Text field
    
  
  
Radio button  
  

     1 
  
  

     2
  
  

     3
  
  
Some text 
  

    
  
  
 
  

    
    
  
  
 
  
 

/www/cgi-bin/test-post

#!/bin/sh
echo "Content-type: text/html"
echo ""
echo ""
echo ""
echo "
"
echo "Environment variables"
echo ""
env
echo ""
echo "========================================================="
echo ""
echo "Form variables :"
echo ""
read QUERY_STRING
eval $(echo "$QUERY_STRING"|awk -F'&' '{for(i=1;i<=NF;i++){print $i}}')
tmp=`httpd -d $Text_Field`
echo "Text_Field=$tmp"
tmp=`httpd -d $Radio_Button`
echo "Radio_Button=$tmp"
tmp=`httpd -d $Text_Area`
echo "Text_Area=$tmp"
echo "
"
echo ""

1.2.2. GET

Text area fields (and any other field that may contain \n are very hard to menage).

Example how to use GET in form.

/www/form-get.html

  
Text field
    
  
  
Radio button  
  

     1 
  
  

     2
  
  

     3
  
  
 
  

    
    
  
  
 
  
 

/www/cgi-bin/test-get

#!/bin/sh
echo "Content-type: text/html"
echo ""
echo ""
echo ""
echo "
"
echo "Environment variables"
echo ""
env
echo ""
echo "========================================================="
echo ""
echo "Form variables :"
echo ""
eval $(echo "$QUERY_STRING"|awk -F'&' '{for(i=1;i<=NF;i++){print $i}}')
tmp=`httpd -d $Text_Field`
echo "Text_Field=$tmp"
tmp=`httpd -d $Radio_Button`
echo "Radio_Button=$tmp"
echo "
"
echo ""

OpenWrtDocs/httpd CGI scripts (dernière édition le 2006-09-18 21:55:07 par phat_bastard)

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