client.c

#define _GNU_SOURCE
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include <tidy/tidy.h>
#include <tidy/tidybuffio.h>
#include <time.h>
#include "config.h"

struct memory {
	char *response;
	size_t size;
};

struct submit_action {
	int contest_id;
	int task_id;
	char *local_file;
	char *reported_filename;
};

static size_t write_callback(void *data, size_t size, size_t nmemb, void *userp) {
	size_t realsize = size *nmemb;
	struct memory *mem = (struct memory *)userp;

	char *ptr = realloc(mem->response, mem->size + realsize + 1);
	if (ptr == NULL)
		return 0;

	mem->response = ptr;
	memcpy(&(mem->response[mem->size]), data, realsize);
	mem->size += realsize;
	mem->response[mem->size] = 0;

	return realsize;
}

static void debug_print_cookies(CURL *curl) {
	CURLcode res;
	struct curl_slist *cookies;
	struct curl_slist *nc;
	int i;

	printf("Cookies, curl knows:\n");
	res = curl_easy_getinfo(curl, CURLINFO_COOKIELIST, &cookies);
	if (res != CURLE_OK) {
		fprintf(stderr, "Curl curl_easy_getinfo failed: %s\n", curl_easy_strerror(res));
		return;
	}
	nc = cookies;
	i = 0;
	while (nc) {
		printf("[%d]: %s\n", i, nc->data);
		nc = nc->next;
		i++;
	}
	if (i == 0) {
		printf("(none)\n");
	}
	curl_slist_free_all(cookies);
}


void setup_curl(CURL *curl,  struct memory *chunk) {
	chunk->response = NULL;
	chunk->size = 0;
	curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "");
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L); // skip cert verification