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315 lines
9.9 KiB
C++
315 lines
9.9 KiB
C++
// Copyright 2017 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "Common/HttpRequest.h"
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#include <chrono>
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#include <cstddef>
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#include <mutex>
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#include <curl/curl.h>
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#include "Common/Logging/Log.h"
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#include "Common/ScopeGuard.h"
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#include "Common/StringUtil.h"
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namespace Common
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{
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class HttpRequest::Impl final
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{
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public:
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enum class Method
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{
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GET,
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POST,
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};
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explicit Impl(std::chrono::milliseconds timeout_ms, ProgressCallback callback);
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bool IsValid() const;
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std::string GetHeaderValue(std::string_view name) const;
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void SetCookies(const std::string& cookies);
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void UseIPv4();
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void FollowRedirects(long max);
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s32 GetLastResponseCode();
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Response Fetch(const std::string& url, Method method, const Headers& headers, const u8* payload,
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size_t size, AllowedReturnCodes codes = AllowedReturnCodes::Ok_Only,
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std::span<Multiform> multiform = {});
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static int CurlProgressCallback(Impl* impl, curl_off_t dltotal, curl_off_t dlnow,
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curl_off_t ultotal, curl_off_t ulnow);
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std::string EscapeComponent(const std::string& string);
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private:
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static inline std::once_flag s_curl_was_initialized;
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ProgressCallback m_callback;
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Headers m_response_headers;
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std::unique_ptr<CURL, decltype(&curl_easy_cleanup)> m_curl{nullptr, curl_easy_cleanup};
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std::string m_error_string;
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};
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HttpRequest::HttpRequest(std::chrono::milliseconds timeout_ms, ProgressCallback callback)
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: m_impl(std::make_unique<Impl>(timeout_ms, std::move(callback)))
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{
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}
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HttpRequest::~HttpRequest() = default;
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bool HttpRequest::IsValid() const
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{
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return m_impl->IsValid();
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}
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void HttpRequest::SetCookies(const std::string& cookies)
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{
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m_impl->SetCookies(cookies);
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}
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void HttpRequest::UseIPv4()
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{
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m_impl->UseIPv4();
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}
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void HttpRequest::FollowRedirects(long max)
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{
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m_impl->FollowRedirects(max);
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}
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std::string HttpRequest::EscapeComponent(const std::string& string)
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{
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return m_impl->EscapeComponent(string);
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}
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s32 HttpRequest::GetLastResponseCode() const
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{
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return m_impl->GetLastResponseCode();
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}
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std::string HttpRequest::GetHeaderValue(std::string_view name) const
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{
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return m_impl->GetHeaderValue(name);
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}
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HttpRequest::Response HttpRequest::Get(const std::string& url, const Headers& headers,
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AllowedReturnCodes codes)
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{
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return m_impl->Fetch(url, Impl::Method::GET, headers, nullptr, 0, codes);
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}
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HttpRequest::Response HttpRequest::Post(const std::string& url, const std::vector<u8>& payload,
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const Headers& headers, AllowedReturnCodes codes)
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{
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return m_impl->Fetch(url, Impl::Method::POST, headers, payload.data(), payload.size(), codes);
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}
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HttpRequest::Response HttpRequest::Post(const std::string& url, const std::string& payload,
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const Headers& headers, AllowedReturnCodes codes)
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{
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return m_impl->Fetch(url, Impl::Method::POST, headers,
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reinterpret_cast<const u8*>(payload.data()), payload.size(), codes);
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}
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int HttpRequest::Impl::CurlProgressCallback(Impl* impl, curl_off_t dltotal, curl_off_t dlnow,
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curl_off_t ultotal, curl_off_t ulnow)
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{
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// Abort if callback isn't true
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return !impl->m_callback(static_cast<s64>(dltotal), static_cast<s64>(dlnow),
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static_cast<s64>(ultotal), static_cast<s64>(ulnow));
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}
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HttpRequest::Impl::Impl(std::chrono::milliseconds timeout_ms, ProgressCallback callback)
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: m_callback(std::move(callback))
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{
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std::call_once(s_curl_was_initialized, [] { curl_global_init(CURL_GLOBAL_DEFAULT); });
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m_curl.reset(curl_easy_init());
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if (!m_curl)
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return;
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curl_easy_setopt(m_curl.get(), CURLOPT_NOPROGRESS, m_callback == nullptr);
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if (m_callback)
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{
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curl_easy_setopt(m_curl.get(), CURLOPT_PROGRESSDATA, this);
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curl_easy_setopt(m_curl.get(), CURLOPT_XFERINFOFUNCTION, CurlProgressCallback);
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}
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// Set up error buffer
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m_error_string.resize(CURL_ERROR_SIZE);
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curl_easy_setopt(m_curl.get(), CURLOPT_ERRORBUFFER, m_error_string.data());
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// libcurl may not have been built with async DNS support, so we disable
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// signal handlers to avoid a possible and likely crash if a resolve times out.
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curl_easy_setopt(m_curl.get(), CURLOPT_NOSIGNAL, true);
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curl_easy_setopt(m_curl.get(), CURLOPT_CONNECTTIMEOUT_MS, static_cast<long>(timeout_ms.count()));
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// Sadly CURLOPT_LOW_SPEED_TIME doesn't have a millisecond variant so we have to use seconds
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curl_easy_setopt(
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m_curl.get(), CURLOPT_LOW_SPEED_TIME,
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static_cast<long>(std::chrono::duration_cast<std::chrono::seconds>(timeout_ms).count()));
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curl_easy_setopt(m_curl.get(), CURLOPT_LOW_SPEED_LIMIT, 1);
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#ifdef _WIN32
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// ALPN support is enabled by default but requires Windows >= 8.1.
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curl_easy_setopt(m_curl.get(), CURLOPT_SSL_ENABLE_ALPN, false);
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#endif
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}
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bool HttpRequest::Impl::IsValid() const
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{
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return m_curl != nullptr;
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}
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s32 HttpRequest::Impl::GetLastResponseCode()
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{
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long response_code{};
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curl_easy_getinfo(m_curl.get(), CURLINFO_RESPONSE_CODE, &response_code);
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return static_cast<s32>(response_code);
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}
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void HttpRequest::Impl::SetCookies(const std::string& cookies)
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{
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curl_easy_setopt(m_curl.get(), CURLOPT_COOKIE, cookies.c_str());
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}
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void HttpRequest::Impl::UseIPv4()
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{
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curl_easy_setopt(m_curl.get(), CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
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}
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HttpRequest::Response HttpRequest::PostMultiform(const std::string& url,
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std::span<Multiform> multiform,
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const Headers& headers, AllowedReturnCodes codes)
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{
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return m_impl->Fetch(url, Impl::Method::POST, headers, nullptr, 0, codes, multiform);
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}
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void HttpRequest::Impl::FollowRedirects(long max)
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{
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curl_easy_setopt(m_curl.get(), CURLOPT_FOLLOWLOCATION, 1);
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curl_easy_setopt(m_curl.get(), CURLOPT_MAXREDIRS, max);
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}
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std::string HttpRequest::Impl::GetHeaderValue(std::string_view name) const
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{
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for (const auto& [key, value] : m_response_headers)
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{
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if (key == name)
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return value.value();
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}
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return {};
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}
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std::string HttpRequest::Impl::EscapeComponent(const std::string& string)
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{
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char* escaped = curl_easy_escape(m_curl.get(), string.c_str(), static_cast<int>(string.size()));
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std::string escaped_str(escaped);
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curl_free(escaped);
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return escaped_str;
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}
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static size_t CurlWriteCallback(char* data, size_t size, size_t nmemb, void* userdata)
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{
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auto* buffer = static_cast<std::vector<u8>*>(userdata);
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const size_t actual_size = size * nmemb;
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buffer->insert(buffer->end(), data, data + actual_size);
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return actual_size;
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}
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static size_t header_callback(char* buffer, size_t size, size_t nitems, void* userdata)
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{
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auto* headers = static_cast<HttpRequest::Headers*>(userdata);
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std::string_view full_buffer = std::string_view{buffer, nitems};
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const size_t colon_pos = full_buffer.find(':');
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if (colon_pos == std::string::npos)
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return nitems * size;
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const std::string_view key = full_buffer.substr(0, colon_pos);
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const std::string_view value = StripWhitespace(full_buffer.substr(colon_pos + 1));
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headers->emplace(std::string{key}, std::string{value});
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return nitems * size;
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}
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HttpRequest::Response HttpRequest::Impl::Fetch(const std::string& url, Method method,
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const Headers& headers, const u8* payload,
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size_t size, AllowedReturnCodes codes,
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std::span<Multiform> multiform)
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{
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m_response_headers.clear();
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curl_easy_setopt(m_curl.get(), CURLOPT_POST, method == Method::POST);
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curl_easy_setopt(m_curl.get(), CURLOPT_URL, url.c_str());
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if (method == Method::POST && multiform.empty())
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{
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curl_easy_setopt(m_curl.get(), CURLOPT_POSTFIELDS, payload);
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curl_easy_setopt(m_curl.get(), CURLOPT_POSTFIELDSIZE, size);
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}
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curl_mime* form = nullptr;
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Common::ScopeGuard multiform_guard{[&form] { curl_mime_free(form); }};
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if (!multiform.empty())
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{
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form = curl_mime_init(m_curl.get());
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for (const auto& value : multiform)
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{
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curl_mimepart* part = curl_mime_addpart(form);
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curl_mime_name(part, value.name.c_str());
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curl_mime_data(part, value.data.c_str(), value.data.size());
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}
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curl_easy_setopt(m_curl.get(), CURLOPT_MIMEPOST, form);
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}
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curl_slist* list = nullptr;
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Common::ScopeGuard list_guard{[&list] { curl_slist_free_all(list); }};
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for (const auto& [name, value] : headers)
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{
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if (!value)
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list = curl_slist_append(list, (name + ':').c_str());
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else if (value->empty())
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list = curl_slist_append(list, (name + ';').c_str());
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else
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list = curl_slist_append(list, (name + ": " + *value).c_str());
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}
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curl_easy_setopt(m_curl.get(), CURLOPT_HTTPHEADER, list);
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curl_easy_setopt(m_curl.get(), CURLOPT_HEADERFUNCTION, header_callback);
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curl_easy_setopt(m_curl.get(), CURLOPT_HEADERDATA, static_cast<void*>(&m_response_headers));
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std::vector<u8> buffer;
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curl_easy_setopt(m_curl.get(), CURLOPT_WRITEFUNCTION, CurlWriteCallback);
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curl_easy_setopt(m_curl.get(), CURLOPT_WRITEDATA, &buffer);
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const char* type = method == Method::POST ? "POST" : "GET";
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const CURLcode res = curl_easy_perform(m_curl.get());
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if (res != CURLE_OK)
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{
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ERROR_LOG_FMT(COMMON, "Failed to {} {}: {}", type, url, m_error_string);
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return {};
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}
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if (codes == AllowedReturnCodes::All)
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return buffer;
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long response_code = 0;
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curl_easy_getinfo(m_curl.get(), CURLINFO_RESPONSE_CODE, &response_code);
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if (response_code != 200)
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{
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if (buffer.empty())
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{
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ERROR_LOG_FMT(COMMON, "Failed to {} {}: server replied with code {}", type, url,
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response_code);
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}
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else
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{
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ERROR_LOG_FMT(COMMON, "Failed to {} {}: server replied with code {} and body\n\x1b[0m{:.{}}",
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type, url, response_code, reinterpret_cast<char*>(buffer.data()),
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static_cast<int>(buffer.size()));
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}
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return {};
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}
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return buffer;
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}
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} // namespace Common
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