/usr/share/httrack/libtest/callbacks-example-filename2.c is in libhttrack-dev 3.44.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | /*
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,string1,string2 ..
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Standard httrack module includes */
#include "httrack-library.h"
#include "htsopt.h"
#include "htsdefines.h"
/* 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);
static int myend(t_hts_callbackarg *carg, httrackp *opt);
/* external functions */
EXTERNAL_FUNCTION int hts_plug(httrackp *opt, const char* argv);
/* TOLOWER */
#define TOLOWER_(a) (a >= 'A' && a <= 'Z') ? (a + ('a' - 'A')) : a
#define TOLOWER(a) ( TOLOWER_( (a) ) )
/*
This sample just replaces all occurences of "string1" into "string2"
string1 and string2 are passed in the callback string:
httrack --wrapper save-name=callback:mysavename,string1,string2 ..
*/
typedef struct t_my_userdef {
char string1[256];
char string2[256];
} t_my_userdef;
/*
module entry point
*/
EXTERNAL_FUNCTION int hts_plug(httrackp *opt, const char* argv) {
const char *arg = strchr(argv, ',');
if (arg != NULL)
arg++;
/* Check args */
if (arg == NULL || *arg == '\0' || strchr(arg, ',') == NULL) {
fprintf(stderr, "** callback error: arguments expected or bad arguments\n");
fprintf(stderr, "usage: httrack --wrapper save-name=callback:mysavename,string1,string2\n");
fprintf(stderr, "example: httrack --wrapper save-name=callback:mysavename,foo,bar\n");
return 0; /* failed */
} else {
char *pos = strchr(arg, ',');
t_my_userdef *userdef = (t_my_userdef*) malloc(sizeof(t_my_userdef));
char * const string1 = userdef->string1;
char * const string2 = userdef->string2;
/* Split args */
fprintf(stderr, "** info: wrapper_init(%s) called!\n", arg);
fprintf(stderr, "** callback example: changing destination filename word by another one\n");
string1[0] = string1[1] = '\0';
strncat(string1, arg, pos - arg);
strcpy(string2, pos + 1);
fprintf(stderr, "** callback info: will replace %s by %s in filenames!\n", string1, string2);
/* Plug callback functions */
CHAIN_FUNCTION(opt, savename, mysavename, userdef);
CHAIN_FUNCTION(opt, end, myend, userdef);
}
return 1; /* success */
}
static int myend(t_hts_callbackarg *carg, httrackp *opt) {
t_my_userdef *userdef = (t_my_userdef*) CALLBACKARG_USERDEF(carg);
fprintf(stderr, "** info: wrapper_exit() called!\n");
if (userdef != NULL) {
free(userdef);
userdef = NULL;
}
/* Call parent functions if multiple callbacks are chained. */
if (CALLBACKARG_PREV_FUN(carg, end) != NULL) {
return CALLBACKARG_PREV_FUN(carg, end)(CALLBACKARG_PREV_CARG(carg), opt);
}
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) {
t_my_userdef *userdef = (t_my_userdef*) CALLBACKARG_USERDEF(carg);
char * const string1 = userdef->string1;
char * const string2 = userdef->string2;
/* */
char *buff, *a, *b;
/* 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 */
buff = strdup(save);
a = buff;
b = save;
*b = '\0'; /* the "save" variable points to a buffer with "sufficient" space */
while(*a) {
if (strncmp(a, string1, (int)strlen(string1)) == 0) {
strcat(b, string2);
b += strlen(b);
a += strlen(string1);
} else {
*b++ = *a++;
*b = '\0';
}
}
free(buff);
return 1; /* success */
}
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