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- /*
- HTTrack external callbacks example : dumy plugin, aimed to log for debugging purpose
-
- 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 ..
- */
-
- /* system includes */
- #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 called as "check_html" callback */
- static int process_file(t_hts_callbackarg *carg, httrackp *opt,
- char* html, int len, const char* url_address, const char* url_file) {
- void *ourDummyArg = (void*) CALLBACKARG_USERDEF(carg); /*optional user-defined arg*/
- char *fmt;
-
- /* call parent functions if multiple callbacks are chained. you can skip this part, if you don't want previous callbacks to be called. */
- if (CALLBACKARG_PREV_FUN(carg, check_html) != NULL) {
- if (!CALLBACKARG_PREV_FUN(carg, check_html)(CALLBACKARG_PREV_CARG(carg), opt,
- html, len, url_address, url_file)) {
- return 0; /* abort */
- }
- }
-
- /* log */
- fprintf(stderr, "* parsing file %s%s\n", url_address, url_file);
- fmt = malloc(strlen(url_address) + strlen(url_file) + 128);
- sprintf(fmt, " parsing file %s%s", url_address, url_file);
- hts_log(opt, "log-wrapper-info", fmt);
- free(fmt);
-
- return 1; /* success */
- }
-
- static int start_of_mirror(t_hts_callbackarg *carg, httrackp *opt) {
- const char *arginfo = (char*) CALLBACKARG_USERDEF(carg);
-
- fprintf(stderr, "* mirror start\n");
- hts_log(opt, arginfo, "mirror started");
-
- /* call parent functions if multiple callbacks are chained. you can skip this part, if you don't want previous callbacks to be called. */
- if (CALLBACKARG_PREV_FUN(carg, end) != NULL) {
- /* status is ok on our side, return other callabck's status */
- return CALLBACKARG_PREV_FUN(carg, start)(CALLBACKARG_PREV_CARG(carg), opt);
- }
-
- return 1; /* success */
- }
-
- /* local function called as "end" callback */
- static int end_of_mirror(t_hts_callbackarg *carg, httrackp *opt) {
- const char *arginfo = (char*) CALLBACKARG_USERDEF(carg);
-
- fprintf(stderr, "* mirror end\n");
- hts_log(opt, arginfo, "mirror ended");
-
- /* call parent functions if multiple callbacks are chained. you can skip this part, if you don't want previous callbacks to be called. */
- if (CALLBACKARG_PREV_FUN(carg, end) != NULL) {
- /* status is ok on our side, return other callabck's status */
- return CALLBACKARG_PREV_FUN(carg, end)(CALLBACKARG_PREV_CARG(carg), opt);
- }
-
- return 1; /* success */
- }
-
- /*
- module entry point
- the function name and prototype MUST match this prototype
- */
- EXTERNAL_FUNCTION int hts_plug(httrackp *opt, const char* argv) {
- /* optional argument passed in the commandline we won't be using here */
- const char *arg = strchr(argv, ',');
- if (arg != NULL)
- arg++;
-
- /* plug callback functions */
- if (arg == NULL)
- arg = "log-wrapper-info";
- hts_log(opt, arg, "* plugging functions");
- CHAIN_FUNCTION(opt, check_html, process_file, (char*) arg);
- CHAIN_FUNCTION(opt, start, start_of_mirror, (char*) arg);
- CHAIN_FUNCTION(opt, end, end_of_mirror, (char*) arg);
-
- hts_log(opt, arg, "* module successfully plugged");
- return 1; /* success */
- }
-
- /*
- module exit point
- the function name and prototype MUST match this prototype
- */
- EXTERNAL_FUNCTION int hts_unplug(httrackp *opt) {
- hts_log(opt, "log-wrapper-info", "* module successfully unplugged");
- return 1;
- }
-