1 /* vim: set noet nosta sw=4 ts=4 ft=c : */

     2 /* Squid docs:

     3 ---------------------------------------------------------------------------

     4 TAG: url_rewrite_program

     5 Specify the location of the executable for the URL rewriter.

     6 Since they can perform almost any function there isn't one included.

     7 

     8 For each requested URL rewriter will receive on line with the format

     9 

    10 URL <SP> client_ip "/" fqdn <SP> user <SP> method [<SP> kvpairs]<NL>

    11 

    12 In the future, the rewriter interface will be extended with

    13 key=value pairs ("kvpairs" shown above).  Rewriter programs

    14 should be prepared to receive and possibly ignore additional

    15 whitespace-separated tokens on each input line.

    16 

    17 And the rewriter may return a rewritten URL. The other components of

    18 the request line does not need to be returned (ignored if they are).

    19 

    20 The rewriter can also indicate that a client-side redirect should

    21 be performed to the new URL. This is done by prefixing the returned

    22 URL with "301:" (moved permanently) or 302: (moved temporarily).

    23 

    24 By default, a URL rewriter is not used.

    25 --------------------------------------------------------------------------- */

    26 

    27 /*

    28  * TODO

    29  *

    30  * flush stdout on writes

    31  * empty struct not necessary?

    32  * inet_pton( AF_INET, *char src, dest )

    33  *

    34  */

    35 

    36 #include "volta.h"

    37 

    38 int

    39 main( int argc, char *argv[] ) {

    40 

    41 	int opt;

    42 

    43 	/* storage for line received from squid */

    44 	char line[ LINE_BUFSIZE ];

    45 

    46 	while ( (opt = getopt( argc, argv, "a:hv" )) != -1 ) {

    47 		switch ( opt ) {

    48 			case 'a':

    49 				printf( "a -> '%s' (no-op at the moment)\n", optarg );

    50 				break;

    51 			case 'h':

    52 				usage( argv[0] );

    53 				return( 0 );

    54 			case 'v':

    55 				printf( "%s version %s\n", PROG, VERSION );

    56 				return( 0 );

    57 			case '?':

    58 			default:

    59 				break;

    60 		}

    61 	}

    62 	argc -= optind;

    63 	argv += optind;

    64 

    65 	/* start stdin line loop */

    66 	while( fgets( line, LINE_BUFSIZE, stdin ) != NULL ) parse( line );

    67 

    68 	/* stdin closed */

    69     debug( "End of stream, shutting down.\n" );

    70     return( 0 );

    71 }

    72 

    73 /*

    74  * Basic usage

    75  */

    76 void

    77 usage( char *prg )

    78 {

    79 	printf( "%s [-vh] [-a <init>]\n", prg );

    80 	printf( "    -v Display version\n" );

    81 	printf( "    -h Usage (you're lookin' at it)\n" );

    82 	printf( "    -a Perform an action:\n" );

    83 	printf( "         init: Initialize a new database\n" );

    84 	printf( "\n" );

    85 	return;

    86 }

    87 

    88 

    89 /*

    90  * Debug function, only output to stderr if -DDEBUG set

    91  */

    92 void

    93 debug( const char *fmt, ... )

    94 {

    95     va_list args;

    96 	va_start( args, fmt );

    97 #ifdef DEBUG

    98 	fprintf( stderr, "%s %d: ", PROG, getpid() );

    99 	vfprintf( stderr, fmt, args );

   100 #endif

   101 	va_end( args );

   102 }

   103