ImgurDownloader

main.cpp

#include <iostream>
#include <algorithm>
#include <curl/curl.h>
#include <curl/easy.h>
#include <curl/curlbuild.h>
#include <sys/stat.h>
#include <SFML/Graphics.hpp>
#include <Thor/Input.hpp>

using namespace std;

size_t write_data(void* ptr, const size_t size, const size_t nmemb, FILE* stream)
{
	return fwrite(ptr, size, nmemb, stream);
}

std::string random_string( size_t length )
{
	auto randchar = []() -> char
	{
		const char charset[] =
			"0123456789"
				"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
				"abcdefghijklmnopqrstuvwxyz";
		const size_t max_index = (sizeof(charset) - 1);
		return charset[ rand() % max_index ];
	};
	std::string str(length,0);
	std::generate_n( str.begin(), length, randchar );
	return str;
}

CURL* curl;
FILE* fp;
CURLcode res;

void get(string url, FILE* fp)
{
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
	curl_easy_setopt(curl, CURLOPT_URL, url.c_str());

	res = curl_easy_perform(curl);
}

void grab_image()
{
	remove("out.png");
	string begin = "http://i.imgur.com/";
	string file = "";
	string url = "";

	url+=begin;
	url+=file;
	url+=".png";

	struct stat st;
	stat("out.png", &st);
	st.st_size=0;

	if (curl)
	{
		// Open file
		fp = fopen("out.png", "w");
		if( fp == NULL ) cout << "File cannot be opened";
		printf("Searching for image...\n");
		while (st.st_size == 0)
		{
			timeval t1;
			gettimeofday(&t1, NULL);
			srand(t1.tv_usec * t1.tv_sec);

			url = "";
			file = random_string(5);

			url+=begin;
			url+=file;
			url+=".png";

			get(url, fp);
			stat("out.png", &st);
		}
		curl_easy_cleanup(curl);
		fclose(fp);
	}

	if (st.st_size > 0)
	{
		printf("Found Image: %s\n", url.c_str());
	}
	else {
		printf("Tried and failed to find an image.\n");
	}

}

int main()
{
	curl = curl_easy_init();
	grab_image();

	return 0;
}