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/*
HTTrack external callbacks example : changing the destination filename
.c file
How to build: (callback.so or callback.dll)
With GNU-GCC:
gcc -O -g3 -Wall -D_REENTRANT -shared -o mycallback.so callbacks-example.c -lhttrack2
With MS-Visual C++:
cl -LD -nologo -W3 -Zi -Zp4 -DWIN32 -Fe"mycallback.dll" callbacks-example.c libhttrack.lib
Note: the httrack library linker option is only necessary when using libhttrack's functions inside the callback
How to use:
httrack --wrapper mycallback ..
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Standard httrack module includes */
#include "httrack-library.h"
#include "htsopt.h"
#include "htsdefines.h"
/* Local function definitions */
static int mysavename(t_hts_callbackarg * carg, httrackp * opt,
const char *adr_complete, const char *fil_complete,
const char *referer_adr, const char *referer_fil,
char *save);
/* external functions */
EXTERNAL_FUNCTION int hts_plug(httrackp * opt, const char *argv);
/* Options settings */
#include "htsopt.h"
/* TOLOWER */
#define TOLOWER_(a) (a >= 'A' && a <= 'Z') ? (a + ('a' - 'A')) : a
#define TOLOWER(a) ( TOLOWER_( (a) ) )
/*
This sample just changes the destination filenames to ROT-13 equivalent ; that is,
a -> n
b -> o
c -> p
d -> q
..
n -> a
o -> b
..
<parent> -> <link>
This sample can be improved, for example, to make a map of a website.
*/
/*
module entry point
*/
EXTERNAL_FUNCTION int hts_plug(httrackp * opt, const char *argv) {
const char *arg = strchr(argv, ',');
if (arg != NULL)
arg++;
/* Plug callback functions */
CHAIN_FUNCTION(opt, savename, mysavename, NULL);
return 1; /* success */
}
static int mysavename(t_hts_callbackarg * carg, httrackp * opt,
const char *adr_complete, const char *fil_complete,
const char *referer_adr, const char *referer_fil,
char *save) {
char *a;
/* Call parent functions if multiple callbacks are chained. */
if (CALLBACKARG_PREV_FUN(carg, savename) != NULL) {
if (!CALLBACKARG_PREV_FUN(carg, savename)
(CALLBACKARG_PREV_CARG(carg), opt, adr_complete, fil_complete,
referer_adr, referer_fil, save)) {
return 0; /* Abort */
}
}
/* Process */
for(a = save; *a != 0; a++) {
char c = TOLOWER(*a);
if (c >= 'a' && c <= 'z')
*a = (((c - 'a') + 13) % 26) + 'a'; // ROT-13
}
return 1; /* success */
}
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