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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/winhttp/net_util.h"
#include <vector>
namespace winhttp {
HRESULT HRESULTFromLastError() {
const auto error_code = ::GetLastError();
return (error_code != NO_ERROR) ? HRESULT_FROM_WIN32(error_code) : E_FAIL;
}
HRESULT QueryHeadersString(HINTERNET request_handle,
uint32_t info_level,
const wchar_t* name,
std::wstring* value) {
DWORD num_bytes = 0;
::WinHttpQueryHeaders(request_handle, info_level, name,
WINHTTP_NO_OUTPUT_BUFFER, &num_bytes,
WINHTTP_NO_HEADER_INDEX);
auto hr = HRESULTFromLastError();
if (hr != HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER))
return hr;
std::vector<wchar_t> buffer(num_bytes / sizeof(wchar_t));
if (!::WinHttpQueryHeaders(request_handle, info_level, name, &buffer.front(),
&num_bytes, WINHTTP_NO_HEADER_INDEX)) {
return HRESULTFromLastError();
}
DCHECK_EQ(0u, num_bytes % sizeof(wchar_t));
buffer.resize(num_bytes / sizeof(wchar_t));
value->assign(buffer.begin(), buffer.end());
return S_OK;
}
HRESULT QueryHeadersInt(HINTERNET request_handle,
uint32_t info_level,
const wchar_t* name,
int* value) {
info_level |= WINHTTP_QUERY_FLAG_NUMBER;
DWORD num_bytes = sizeof(*value);
if (!::WinHttpQueryHeaders(request_handle, info_level, name, value,
&num_bytes, WINHTTP_NO_HEADER_INDEX)) {
return HRESULTFromLastError();
}
return S_OK;
}
} // namespace winhttp
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