输出CGI的环境变量

浅浅的花香味﹌ 2022-08-13 04:58 212阅读 0赞

用C写的，输出CGI的环境变量.

1.  路径:/var/www/cgi\-bin/  
    
2.  编译:gcc \-o cgi\_env cgi\_env.c \-std=c99  
    
3.  在浏览器中输入http://localhost/cgi\-bin/cgi\_env 或者 http://ip/cgi\-bin/cgi\_env

1.  //cgi\_env.c
2.  \#include <stdlib.h>  
    
3.  \#include <stdio.h>  
    
4.    
    
5.  int main ( int argc, char \*argv\[\] )  
    
6.  \{   
    
7.      char \*env\_var\[ 24 \] = \{   
    
8.      "COMSPEC", "DOCUMENT\_ROOT", "GATEWAY\_INTERFACE",  
    
9.      "HTTP\_ACCEPT", "HTTP\_ACCEPT\_ENCODING",  
    
10.     "HTTP\_ACCEPT\_LANGUAGE", "HTTP\_CONNECTION",  
    
11.     "HTTP\_HOST", "HTTP\_USER\_AGENT", "PATH",  
    
12.     "QUERY\_STRING", "REMOTE\_ADDR", "REMOTE\_PORT",  
    
13.     "REQUEST\_METHOD", "REQUEST\_URI", "SCRIPT\_FILENAME",  
    
14.     "SCRIPT\_NAME", "SERVER\_ADDR", "SERVER\_ADMIN",  
    
15.     "SERVER\_NAME","SERVER\_PORT","SERVER\_PROTOCOL",  
    
16.     "SERVER\_SIGNATURE","SERVER\_SOFTWARE" \};  
    
17.   
    
18.     printf ( "%s\\n","Content-Type: text/html\\n" );  
    
19.     printf ( "%s\\n","<?xml version = \\"1.0\\"?>" );  
    
20.     printf ( "%s\\n","<!DOCTYPE html PUBLIC \\"\-//W3C//DTD XHTML 1.1//EN\\" " );  
    
21.     printf ( "%s\\n","\\"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\\">" );  
    
22.     printf ( "%s\\n","<html xmlns = \\"http://www.w3.org/1999/xhtml\\">" );  
    
23.     printf ( "%s\\n","<head><title>CGI环境变量</title></head><body>" );  
    
24.     printf ( "%s\\n","<table border = \\"0\\" cellspacing = \\"2\\">" );  
    
25.   
    
26.     for ( int i=0;i<24;i\+\+ ) \{   
    
27.         printf ( "%s%s%s\\n","<tr><td>",env\_var\[i\],"</td><td>" );  
    
28.         char \*value = getenv( env\_var\[i\]);  
    
29.   
    
30.         if ( value ) \{   
    
31.             printf ( "%s",value );  
    
32.         \}  
    
33.         else \{   
    
34.             printf ( "%s","CGI环境变量不存在." );  
    
35.         \}  
    
36.         printf ( "%s\\n","</td></tr>" );  
    
37.     \}  
    
38.     printf ( "%s\\n","</table></body></html>" );  
    
39.     printf ( "%s\\n","C语言编写" );  
    
40.     return EXIT\_SUCCESS;  
    
41. \}