#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
struct webpage_data
{
char *data;
size_t size;
};
size_t write_callback(char *ptr, size_t size, size_t nmemb, void *userdata)
{
struct webpage_data *data = (struct webpage_data *)userdata;
size_t data_size = size * nmemb;
char *new_data = (char *)malloc(data->size + data_size + 1);
if (new_data == NULL)
{
fprintf(stderr, “Error: failed to allocate memory for webpage data.\n”);
return 0;
}
if (data->data != NULL)
{
memcpy(new_data, data->data, data->size);
free(data->data);
}
memcpy(&(new_data[data->size]), ptr, data_size);
data->size += data_size;
new_data[data->size] = ‘\0’;
data->data = new_data;
return data_size;
}
int main(void)
{
CURL *curl;
CURLcode res;
struct webpage_data data = {NULL, 0};
char threat[100];
char url[1000];
printf(“\033[4m\033[36m”);
printf(“Enter the threat to search for: “);
scanf(“%s”, threat);
printf(“Enter the URL to analyze: “);
scanf(“%s”, url);
curl_global_init(CURL_GLOBAL_DEFAULT);
curl = curl_easy_init();
if (curl)
{
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &data);
res = curl_easy_perform(curl);
if (res != CURLE_OK)
{
fprintf(stderr, “Error downloading webpage: %s\n”, curl_easy_strerror(res));
}
else
{
char *found_line = strstr(data.data, threat);
if (found_line != NULL)
{
char *start_line = found_line;
while (*start_line != ‘\n’ && start_line != data.data)
{
start_line–;
}
if (*start_line == ‘\n’)
{
start_line++;
}
char *end_line = found_line;
while (*end_line != ‘\n’ && *end_line != ‘\0’)
{
end_line++;
}
*end_line = ‘\0’;
printf(“\nThe threat ‘%s’ was found on the webpage ‘%s’.\n”, threat, url);
printf(“The full line where the threat was found is:\n%s\n”, start_line);
}
else
{
printf(“\nThe threat ‘%s’ was not found on the webpage ‘%s’.\n”, threat, url);
}
}
curl_easy_cleanup(curl);
}
if (data.data != NULL)
{
free(data.data);
}
curl_global_cleanup();
return 0;
}
CodeSculpt 