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#include "GithubAPI.hpp"
#include "json.hpp"
#include <curl/curl.h>
#include <fstream>
#include <iostream>
GithubAPI::GithubAPI(std::string username)
: username(username), avatar_url(), avatar_buffer() {
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
}
GithubAPI::~GithubAPI() {
curl_easy_cleanup(curl);
curl_global_cleanup();
}
static size_t WriteToStringCallback(void *contents, size_t size, size_t nmemb,
void *userp) {
std::string *const out = (std::string *)userp;
out->append((char *)contents, size * nmemb);
return size * nmemb;
}
static size_t WriteToBufferCallback(void *contents, size_t size, size_t nmemb,
void *userp) {
std::vector<unsigned char> *const out = (std::vector<unsigned char> *)userp;
out->insert(out->end(), (unsigned char *)contents,
(unsigned char *)contents + (size * nmemb));
return size * nmemb;
}
bool GithubAPI::DownloadAvatar() {
if (GetAvatarURL() == false) {
return false;
}
return GetAvatarImage();
}
size_t GithubAPI::GetAvatarBuffer(std::vector<unsigned char> &avatar_buffer) {
avatar_buffer = this->avatar_buffer;
return avatar_buffer.size();
}
bool GithubAPI::AvatarToFile(std::string filename) {
std::vector<unsigned char> avatar_buffer;
if (GetAvatarBuffer(avatar_buffer) == 0) {
return false;
}
{
std::ofstream avout(filename, std::ios::out | std::ios::binary);
avout.write((char const *)avatar_buffer.data(), avatar_buffer.size());
avout.close();
}
return true;
}
bool GithubAPI::ResetCURL() {
if (curl == nullptr) {
return false;
}
curl_easy_reset(curl);
return true;
}
bool GithubAPI::GetAvatarURL() {
bool ret = true;
CURLcode res;
struct curl_slist *headers = NULL;
std::string json_str;
nlohmann::json json;
std::string gURL = "https://api.github.com/users/" + username;
if (ResetCURL() == false) {
ret = false;
goto failure;
}
headers = curl_slist_append(headers, "Accept: application/json");
headers = curl_slist_append(headers, "charset: utf-8");
curl_easy_setopt(curl, CURLOPT_URL, gURL.c_str());
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_USERAGENT, "github-avatar-ukrainify/0.1");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteToStringCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &json_str);
res = curl_easy_perform(curl);
if (res != CURLE_OK) {
std::cerr << "libcurl returned: " << curl_easy_strerror(res) << std::endl;
ret = false;
goto failure;
}
json = nlohmann::json::parse(json_str);
if (json["login"] != username) {
std::cerr << "Username mismatch: " << json["login"] << " != " << username
<< std::endl;
}
avatar_url = json["avatar_url"];
failure:
curl_slist_free_all(headers);
return ret;
}
bool GithubAPI::GetAvatarImage() {
bool ret = true;
CURLcode res;
struct curl_slist *headers = NULL;
if (ResetCURL() == false) {
ret = false;
goto failure;
}
avatar_buffer.clear();
headers = curl_slist_append(headers, "Accept: image/*");
curl_easy_setopt(curl, CURLOPT_URL, avatar_url.c_str());
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_USERAGENT, "github-avatar-ukrainify/0.1");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteToBufferCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &avatar_buffer);
res = curl_easy_perform(curl);
if (res != CURLE_OK) {
std::cerr << "libcurl returned: " << curl_easy_strerror(res) << std::endl;
ret = false;
goto failure;
}
failure:
curl_slist_free_all(headers);
return ret;
}
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