Duckstation/src/frontend-common/http_downloader_winhttp.cpp

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#include "http_downloader_winhttp.h"
#include "common/assert.h"
#include "common/log.h"
#include "common/string_util.h"
#include "common/timer.h"
#include <VersionHelpers.h>
#include <algorithm>
Log_SetChannel(HTTPDownloaderWinHttp);
#pragma comment(lib, "winhttp.lib")
namespace FrontendCommon {
HTTPDownloaderWinHttp::HTTPDownloaderWinHttp() : HTTPDownloader() {}
HTTPDownloaderWinHttp::~HTTPDownloaderWinHttp()
{
if (m_hSession)
{
WinHttpSetStatusCallback(m_hSession, nullptr, WINHTTP_CALLBACK_FLAG_ALL_NOTIFICATIONS, NULL);
WinHttpCloseHandle(m_hSession);
}
}
std::unique_ptr<HTTPDownloader> HTTPDownloader::Create(const char* user_agent)
{
std::unique_ptr<HTTPDownloaderWinHttp> instance(std::make_unique<HTTPDownloaderWinHttp>());
if (!instance->Initialize(user_agent))
return {};
return instance;
}
bool HTTPDownloaderWinHttp::Initialize(const char* user_agent)
{
// WINHTTP_ACCESS_TYPE_AUTOMATIC_PROXY is not supported before Win8.1.
const DWORD dwAccessType =
IsWindows8Point1OrGreater() ? WINHTTP_ACCESS_TYPE_AUTOMATIC_PROXY : WINHTTP_ACCESS_TYPE_DEFAULT_PROXY;
m_hSession = WinHttpOpen(StringUtil::UTF8StringToWideString(user_agent).c_str(), dwAccessType, nullptr, nullptr,
WINHTTP_FLAG_ASYNC);
if (m_hSession == NULL)
{
Log_ErrorPrintf("WinHttpOpen() failed: %u", GetLastError());
return false;
}
const DWORD notification_flags = WINHTTP_CALLBACK_FLAG_ALL_COMPLETIONS | WINHTTP_CALLBACK_FLAG_REQUEST_ERROR |
WINHTTP_CALLBACK_FLAG_HANDLES | WINHTTP_CALLBACK_FLAG_SECURE_FAILURE;
if (WinHttpSetStatusCallback(m_hSession, HTTPStatusCallback, notification_flags, NULL) ==
WINHTTP_INVALID_STATUS_CALLBACK)
{
Log_ErrorPrintf("WinHttpSetStatusCallback() failed: %u", GetLastError());
return false;
}
return true;
}
void CALLBACK HTTPDownloaderWinHttp::HTTPStatusCallback(HINTERNET hRequest, DWORD_PTR dwContext, DWORD dwInternetStatus,
LPVOID lpvStatusInformation, DWORD dwStatusInformationLength)
{
Request* req = reinterpret_cast<Request*>(dwContext);
switch (dwInternetStatus)
{
case WINHTTP_CALLBACK_STATUS_HANDLE_CREATED:
return;
case WINHTTP_CALLBACK_STATUS_HANDLE_CLOSING:
{
if (!req)
return;
DebugAssert(hRequest == req->hRequest);
HTTPDownloaderWinHttp* parent = static_cast<HTTPDownloaderWinHttp*>(req->parent);
std::unique_lock<std::mutex> lock(parent->m_pending_http_request_lock);
Assert(std::none_of(parent->m_pending_http_requests.begin(), parent->m_pending_http_requests.end(),
[req](HTTPDownloader::Request* it) { return it == req; }));
// we can clean up the connection as well
DebugAssert(req->hConnection != NULL);
WinHttpCloseHandle(req->hConnection);
delete req;
return;
}
case WINHTTP_CALLBACK_STATUS_REQUEST_ERROR:
{
const WINHTTP_ASYNC_RESULT* res = reinterpret_cast<const WINHTTP_ASYNC_RESULT*>(lpvStatusInformation);
Log_ErrorPrintf("WinHttp async function %p returned error %u", res->dwResult, res->dwError);
req->status_code = -1;
req->state.store(Request::State::Complete);
return;
}
case WINHTTP_CALLBACK_STATUS_SENDREQUEST_COMPLETE:
{
Log_DevPrintf("SendRequest complete");
if (!WinHttpReceiveResponse(hRequest, nullptr))
{
Log_ErrorPrintf("WinHttpReceiveResponse() failed: %u", GetLastError());
req->status_code = -1;
req->state.store(Request::State::Complete);
}
return;
}
case WINHTTP_CALLBACK_STATUS_HEADERS_AVAILABLE:
{
Log_DevPrintf("Headers available");
DWORD buffer_size = sizeof(req->status_code);
if (!WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_STATUS_CODE | WINHTTP_QUERY_FLAG_NUMBER,
WINHTTP_HEADER_NAME_BY_INDEX, &req->status_code, &buffer_size, WINHTTP_NO_HEADER_INDEX))
{
Log_ErrorPrintf("WinHttpQueryHeaders() for status code failed: %u", GetLastError());
req->status_code = -1;
req->state.store(Request::State::Complete);
return;
}
buffer_size = sizeof(req->content_length);
if (!WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_CONTENT_LENGTH | WINHTTP_QUERY_FLAG_NUMBER,
WINHTTP_HEADER_NAME_BY_INDEX, &req->content_length, &buffer_size,
WINHTTP_NO_HEADER_INDEX))
{
if (GetLastError() != ERROR_WINHTTP_HEADER_NOT_FOUND)
Log_WarningPrintf("WinHttpQueryHeaders() for content length failed: %u", GetLastError());
req->content_length = 0;
}
Log_DevPrintf("Status code %d, content-length is %u", req->status_code, req->content_length);
req->data.reserve(req->content_length);
req->state = Request::State::Receiving;
// start reading
if (!WinHttpQueryDataAvailable(hRequest, nullptr) && GetLastError() != ERROR_IO_PENDING)
{
Log_ErrorPrintf("WinHttpQueryDataAvailable() failed: %u", GetLastError());
req->status_code = -1;
req->state.store(Request::State::Complete);
}
return;
}
case WINHTTP_CALLBACK_STATUS_DATA_AVAILABLE:
{
DWORD bytes_available;
std::memcpy(&bytes_available, lpvStatusInformation, sizeof(bytes_available));
if (bytes_available == 0)
{
// end of request
Log_DevPrintf("End of request '%s', %zu bytes received", req->url.c_str(), req->data.size());
req->state.store(Request::State::Complete);
return;
}
// start the transfer
Log_DevPrintf("%u bytes available", bytes_available);
req->io_position = static_cast<u32>(req->data.size());
req->data.resize(req->io_position + bytes_available);
if (!WinHttpReadData(hRequest, req->data.data() + req->io_position, bytes_available, nullptr) &&
GetLastError() != ERROR_IO_PENDING)
{
Log_ErrorPrintf("WinHttpReadData() failed: %u", GetLastError());
req->status_code = -1;
req->state.store(Request::State::Complete);
}
return;
}
case WINHTTP_CALLBACK_STATUS_READ_COMPLETE:
{
Log_DevPrintf("Read of %u complete", dwStatusInformationLength);
const u32 new_size = req->io_position + dwStatusInformationLength;
Assert(new_size <= req->data.size());
req->data.resize(new_size);
req->start_time = Common::Timer::GetValue();
if (!WinHttpQueryDataAvailable(hRequest, nullptr) && GetLastError() != ERROR_IO_PENDING)
{
Log_ErrorPrintf("WinHttpQueryDataAvailable() failed: %u", GetLastError());
req->status_code = -1;
req->state.store(Request::State::Complete);
}
return;
}
default:
// unhandled, ignore
return;
}
}
HTTPDownloader::Request* HTTPDownloaderWinHttp::InternalCreateRequest()
{
Request* req = new Request();
return req;
}
void HTTPDownloaderWinHttp::InternalPollRequests()
{
// noop - it uses windows's worker threads
}
bool HTTPDownloaderWinHttp::StartRequest(HTTPDownloader::Request* request)
{
Request* req = static_cast<Request*>(request);
std::wstring host_name;
host_name.resize(req->url.size());
req->object_name.resize(req->url.size());
URL_COMPONENTSW uc = {};
uc.dwStructSize = sizeof(uc);
uc.lpszHostName = host_name.data();
uc.dwHostNameLength = static_cast<DWORD>(host_name.size());
uc.lpszUrlPath = req->object_name.data();
uc.dwUrlPathLength = static_cast<DWORD>(req->object_name.size());
const std::wstring url_wide(StringUtil::UTF8StringToWideString(req->url));
if (!WinHttpCrackUrl(url_wide.c_str(), static_cast<DWORD>(url_wide.size()), 0, &uc))
{
Log_ErrorPrintf("WinHttpCrackUrl() failed: %u", GetLastError());
req->callback(-1, req->data);
delete req;
return false;
}
host_name.resize(uc.dwHostNameLength);
req->object_name.resize(uc.dwUrlPathLength);
req->hConnection = WinHttpConnect(m_hSession, host_name.c_str(), uc.nPort, 0);
if (!req->hConnection)
{
Log_ErrorPrintf("Failed to start HTTP request for '%s': %u", req->url.c_str(), GetLastError());
req->callback(-1, req->data);
delete req;
return false;
}
const DWORD request_flags = uc.nScheme == INTERNET_SCHEME_HTTPS ? WINHTTP_FLAG_SECURE : 0;
req->hRequest =
WinHttpOpenRequest(req->hConnection, (req->type == HTTPDownloader::Request::Type::Post) ? L"POST" : L"GET",
req->object_name.c_str(), NULL, NULL, NULL, request_flags);
if (!req->hRequest)
{
Log_ErrorPrintf("WinHttpOpenRequest() failed: %u", GetLastError());
WinHttpCloseHandle(req->hConnection);
return false;
}
BOOL result;
if (req->type == HTTPDownloader::Request::Type::Post)
{
result = WinHttpSendRequest(req->hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, req->post_data.data(),
static_cast<DWORD>(req->post_data.size()), static_cast<DWORD>(req->post_data.size()),
reinterpret_cast<DWORD_PTR>(req));
}
else
{
result = WinHttpSendRequest(req->hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0,
reinterpret_cast<DWORD_PTR>(req));
}
if (!result && GetLastError() != ERROR_IO_PENDING)
{
Log_ErrorPrintf("WinHttpSendRequest() failed: %u", GetLastError());
req->status_code = -1;
req->state.store(Request::State::Complete);
}
Log_DevPrintf("Started HTTP request for '%s'", req->url.c_str());
req->state = Request::State::Started;
req->start_time = Common::Timer::GetValue();
return true;
}
void HTTPDownloaderWinHttp::CloseRequest(HTTPDownloader::Request* request)
{
Request* req = static_cast<Request*>(request);
if (req->hRequest != NULL)
{
// req will be freed by the callback.
// the callback can fire immediately here if there's nothing running async, so don't touch req afterwards
WinHttpCloseHandle(req->hRequest);
return;
}
if (req->hConnection != NULL)
WinHttpCloseHandle(req->hConnection);
delete req;
}
} // namespace FrontendCommon