1 files changed, 65 insertions, 0 deletions
diff --git a/libtest/callbacks-example-changecontent.c b/libtest/callbacks-example-changecontent.c
new file mode 100755
index 0000000..7e0e0a9
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+++ b/libtest/callbacks-example-changecontent.c
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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 -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 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;
+}