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// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "Common/HttpRequest.h"
#include <chrono>
#include <cstddef>
#include <curl/curl.h>
#include <mutex>
#include "Common/Logging/Log.h"
#include "Common/ScopeGuard.h"
#include "Common/StringUtil.h"
namespace Common
{
class HttpRequest::Impl final
{
public:
enum class Method
{
GET,
POST,
};
explicit Impl(std::chrono::milliseconds timeout_ms);
bool IsValid() const;
Response Fetch(const std::string& url, Method method, const Headers& headers, const u8* payload,
size_t size);
private:
static std::mutex s_curl_was_inited_mutex;
static bool s_curl_was_inited;
std::unique_ptr<CURL, decltype(&curl_easy_cleanup)> m_curl{nullptr, curl_easy_cleanup};
};
std::mutex HttpRequest::Impl::s_curl_was_inited_mutex;
bool HttpRequest::Impl::s_curl_was_inited = false;
HttpRequest::HttpRequest(std::chrono::milliseconds timeout_ms)
: m_impl(std::make_unique<Impl>(timeout_ms))
{
}
HttpRequest::~HttpRequest() = default;
bool HttpRequest::IsValid() const
{
return m_impl->IsValid();
}
HttpRequest::Response HttpRequest::Get(const std::string& url, const Headers& headers)
{
return m_impl->Fetch(url, Impl::Method::GET, headers, nullptr, 0);
}
HttpRequest::Response HttpRequest::Post(const std::string& url, const std::vector<u8>& payload,
const Headers& headers)
{
return m_impl->Fetch(url, Impl::Method::POST, headers, payload.data(), payload.size());
}
HttpRequest::Response HttpRequest::Post(const std::string& url, const std::string& payload,
const Headers& headers)
{
return m_impl->Fetch(url, Impl::Method::POST, headers,
reinterpret_cast<const u8*>(payload.data()), payload.size());
}
HttpRequest::Impl::Impl(std::chrono::milliseconds timeout_ms)
{
{
std::lock_guard<std::mutex> lk(s_curl_was_inited_mutex);
if (!s_curl_was_inited)
{
curl_global_init(CURL_GLOBAL_DEFAULT);
s_curl_was_inited = true;
}
}
m_curl.reset(curl_easy_init());
if (!m_curl)
return;
// libcurl may not have been built with async DNS support, so we disable
// signal handlers to avoid a possible and likely crash if a resolve times out.
curl_easy_setopt(m_curl.get(), CURLOPT_NOSIGNAL, true);
curl_easy_setopt(m_curl.get(), CURLOPT_TIMEOUT_MS, static_cast<long>(timeout_ms.count()));
#ifdef _WIN32
// ALPN support is enabled by default but requires Windows >= 8.1.
curl_easy_setopt(m_curl.get(), CURLOPT_SSL_ENABLE_ALPN, false);
#endif
}
bool HttpRequest::Impl::IsValid() const
{
return m_curl != nullptr;
}
static size_t CurlCallback(char* data, size_t size, size_t nmemb, void* userdata)
{
auto* buffer = static_cast<std::vector<u8>*>(userdata);
const size_t actual_size = size * nmemb;
buffer->insert(buffer->end(), data, data + actual_size);
return actual_size;
}
HttpRequest::Response HttpRequest::Impl::Fetch(const std::string& url, Method method,
const Headers& headers, const u8* payload,
size_t size)
{
curl_easy_setopt(m_curl.get(), CURLOPT_POST, method == Method::POST);
curl_easy_setopt(m_curl.get(), CURLOPT_URL, url.c_str());
if (method == Method::POST)
{
curl_easy_setopt(m_curl.get(), CURLOPT_POSTFIELDS, payload);
curl_easy_setopt(m_curl.get(), CURLOPT_POSTFIELDSIZE, size);
}
curl_slist* list = nullptr;
Common::ScopeGuard list_guard{[&list] { curl_slist_free_all(list); }};
for (const std::pair<std::string, std::optional<std::string>>& header : headers)
{
if (!header.second)
list = curl_slist_append(list, (header.first + ":").c_str());
else if (header.second->empty())
list = curl_slist_append(list, (header.first + ";").c_str());
else
list = curl_slist_append(list, (header.first + ": " + *header.second).c_str());
}
curl_easy_setopt(m_curl.get(), CURLOPT_HTTPHEADER, list);
std::vector<u8> buffer;
curl_easy_setopt(m_curl.get(), CURLOPT_WRITEFUNCTION, CurlCallback);
curl_easy_setopt(m_curl.get(), CURLOPT_WRITEDATA, &buffer);
const char* type = method == Method::POST ? "POST" : "GET";
const CURLcode res = curl_easy_perform(m_curl.get());
if (res != CURLE_OK)
{
ERROR_LOG(COMMON, "Failed to %s %s: %s", type, url.c_str(), curl_easy_strerror(res));
return {};
}
long response_code = 0;
curl_easy_getinfo(m_curl.get(), CURLINFO_RESPONSE_CODE, &response_code);
if (response_code != 200)
{
ERROR_LOG(COMMON, "Failed to %s %s: server replied with code %li and body\n\x1b[0m%s", type,
url.c_str(), response_code, buffer.data());
return {};
}
return buffer;
}
} // namespace Common
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