/usr/share/httrack/libtest/callbacks-example-changecontent.c is in libhttrack-dev 3.49.2-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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HTTrack external callbacks example : display all incoming request headers
Example of <wrappername>_init and <wrappername>_exit call (httrack >> 3.31)
.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 postprocess(t_hts_callbackarg * carg, httrackp * opt, char **html,
int *len, const char *url_address, const char *url_file);
/* external functions */
EXTERNAL_FUNCTION int hts_plug(httrackp * opt, const char *argv);
/*
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, postprocess, postprocess, NULL);
return 1; /* success */
}
static int postprocess(t_hts_callbackarg * carg, httrackp * opt, char **html,
int *len, const char *url_address,
const char *url_file) {
char *old = *html;
/* Call parent functions if multiple callbacks are chained. */
if (CALLBACKARG_PREV_FUN(carg, postprocess) != NULL) {
if (CALLBACKARG_PREV_FUN(carg, postprocess)
(CALLBACKARG_PREV_CARG(carg), opt, html, len, url_address, url_file)) {
/* Modified *html */
old = *html;
}
}
/* Process */
*html = strdup(*html);
hts_free(old);
return 1;
}
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