thttpd, 利用CGI获取GET/POST的参数, openwrt下自测成功

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static void
internal_error( char* reason )
{
  char* title = "500 Internal Error";

#if 0
  (void)printf( "
    Status: %sn
    Content-type: text/htmln
    n
    %sn
    
				
					%s
				
n
    Something unusual went wrong during a redirection request:n
    
				
					n
    %sn
    n
    nn", title, title, title, reason );

#else
  (void)printf("Content-Type: text/htmlnn
    %sn
    n
    
				
					n
    %sn
    n
    
n", title, reason);
#endif
}

static void
not_found( char* script_name )
{
  char* title = "404 Not Found";

  (void) printf( "
    Status: %sn
    Content-type: text/htmln
    n
    %sn
    
				
					%s
				
n
    The requested filename, %s, is set up to be redirected to another URL;n
    however, the new URL has not yet been specified.n
    n", title, title, title, script_name );
  fflush(stdout);
}

//COMSPEC = (null), DOCUMENT_ROOT = (null), GATEWAY_INTERFACE = CGI/1.1, HTTP_ACCEPT = text/html,
//application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8, HTTP_ACCEPT_ENCODING = gzip, deflate,
//HTTP_ACCEPT_LANGUAGE = zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3, HTTP_CONNECTION = (null), HTTP_HOST = 192.168.1.1,
//HTTP_USER_AGENT = Mozilla/5.0 (Windows NT 5.1; rv:20.0) Gecko/20100101 Firefox/20.0,
//PATH = /usr/local/bin:/usr/ucb:/bin:/usr/bin, QUERY_STRING = T1=1, REMOTE_ADDR = 192.168.1.224,
//REMOTE_PORT = (null), REQUEST_METHOD = GET, REQUEST_URI = (null), SCRIPT_FILENAME = (null),
//SCRIPT_NAME = /cgi-bin/phf, SERVER_ADDR = (null), SERVER_ADMIN = (null), SERVER_NAME = OpenWrt,
//SERVER_PORT = 8081, SERVER_PROTOCOL = HTTP/1.1, SERVER_SIGNATURE = (null), SERVER_SOFTWARE = thttpd/2.25b qiushui_007 V1.1
//REQUEST_METHOD = GET, REQUEST_URI = (null)
//REQUEST_METHOD = POST
void list_argument(void)
{
  char *env_var[] = {
    "COMSPEC", "DOCUMENT_ROOT", "GATEWAY_INTERFACE",
    "HTTP_ACCEPT", "HTTP_ACCEPT_ENCODING",
    "HTTP_ACCEPT_LANGUAGE", "HTTP_CONNECTION",
    "HTTP_HOST", "HTTP_USER_AGENT", "PATH",
    "QUERY_STRING", "REMOTE_ADDR", "REMOTE_PORT",
    "REQUEST_METHOD", "REQUEST_URI", "SCRIPT_FILENAME",
    "SCRIPT_NAME", "SERVER_ADDR", "SERVER_ADMIN",
    "SERVER_NAME","SERVER_PORT","SERVER_PROTOCOL",
    "SERVER_SIGNATURE","SERVER_SOFTWARE", "CONTENT_LENGTH" };
  char *value, i;

  printf("Content-Type: text/htmlnn");
  printf( "-//W3C//DTD HTML 4.0 Transitional//EN">n" );
  printf( "n" );
  printf( "-Type" CONTENT="text/html; charset=EUC-JP">n" );
  printf( "" CONTENT="no-cache">n" );
  printf( "TESTn" );
  for (i=0; i<25; i++) {
    value = getenv( env_var[i]);
    //printf ( "%s%s%sn","",env_var[i],"" );
    printf ( "%s = %s,  ", env_var[i], value);
  }
  printf("n
n");
  //printf("%sn", "Content-Type: text/hmln");
  //fflush(stdout);
}


static char* argv0;
int main( int argc, char* argv[] )
{
  char *script_name;
  char *path_info;
  char *cp;
  char *str1;
  unsigned char i;
  char *envstr;
  char *method;
  char *envbuf;
  int envlen;
  size_t n;

  argv0 = argv[0];

  list_argument();

#if 0
  script_name = getenv( "SCRIPT_NAME" );
  if ( script_name == (char*) 0 )
  {
    internal_error( "Couldn't get SCRIPT_NAME environment variable." );
    exit( 1 );
  }

  //Append the PATH_INFO, if any. This allows redirection of whole directories.
  path_info = getenv( "PATH_INFO" );
  if ( path_info != (char*) 0 )
  {
    cp = (char*) malloc( strlen( script_name ) + strlen( path_info ) + 1 );
    if ( cp == (char*) 0 )
    {
      internal_error( "Out of memory." );
      exit( 1 );
    }
    (void) sprintf( cp, "%s%s", script_name, path_info );
    script_name = cp;
  }
#endif

  printf( "Content-type: text/htmlnn" );
  printf( "-//W3C//DTD HTML 4.0 Transitional//EN">n" );
  printf( "n" );
  printf( "-Type" CONTENT="text/html; charset=EUC-JP">n" );
  printf( "" CONTENT="no-cache">n" );
  printf( "TESTn" );

  method = getenv("REQUEST_METHOD");
  if( (method != (char*)NULL) && !strcmp( method, "POST" ) )
  {
    printf("== POST REQUEST ==
n");

    envstr = getenv("CONTENT_LENGTH");
    if( (envstr != (char*)NULL) && ((envlen=atoi(envstr)) > 0) )
    {
      envbuf = malloc( envlen+1 );
      n = fread( envbuf, 1, envlen, stdin );
      envbuf[n] = '';
      printf("%s
n", envbuf);

      free(envbuf);
    }
  }
  else if( (method != (char*)NULL) && !strcmp( method, "GET" ) ) {
    //printf("== NOT POST REQUEST ==
n");
    envstr = getenv("QUERY_STRING");
    if ( envstr == (char*) 0 ) {
      internal_error( "Couldn't get environment variable: QUERY_STRING" );
      //exit( 1 );
    }

    printf("
				
					QUERY_STRING = %s
				
n", envstr);
  }

  //最后统一
  printf( "nn" );

  return 0;
}

2. 利用thttpd, 再加上自写的CGI,  移植成功了原先的项目. 图例如下