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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 -lhttrack1
- With MS-Visual C++:
- cl -LD -nologo -W3 -Zi -Zp4 -DWIN32 -Fe"mycallback.dll" callbacks-example.c libhttrack1.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);
-
- /* 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 */
- }
-