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// Copyright Epic Games, Inc. All Rights Reserved.
#include <zenhttp/httpclient.h>
#include <zenhttp/httpserver.h>
#include <zencore/compactbinarybuilder.h>
#include <zencore/compactbinarypackage.h>
#include <zencore/iobuffer.h>
#include <zencore/logging.h>
#include <zencore/session.h>
#include <zencore/sharedbuffer.h>
#include <zencore/stream.h>
#include <zencore/testing.h>
#include <zenhttp/httpshared.h>
static std::atomic<uint32_t> HttpClientRequestIdCounter{0};
namespace zen {
using namespace std::literals;
HttpClient::Response
FromCprResponse(cpr::Response& InResponse)
{
return {.StatusCode = int(InResponse.status_code)};
}
//////////////////////////////////////////////////////////////////////////
HttpClient::HttpClient(std::string_view BaseUri) : m_BaseUri(BaseUri)
{
StringBuilder<32> SessionId;
GetSessionId().ToString(SessionId);
m_SessionId = SessionId;
}
HttpClient::~HttpClient()
{
}
HttpClient::Response
HttpClient::TransactPackage(std::string_view Url, CbPackage Package)
{
cpr::Session Sess;
Sess.SetUrl(m_BaseUri + std::string(Url));
// First, list of offered chunks for filtering on the server end
std::vector<IoHash> AttachmentsToSend;
std::span<const CbAttachment> Attachments = Package.GetAttachments();
const uint32_t RequestId = ++HttpClientRequestIdCounter;
auto RequestIdString = fmt::to_string(RequestId);
if (Attachments.empty() == false)
{
CbObjectWriter Writer;
Writer.BeginArray("offer");
for (const CbAttachment& Attachment : Attachments)
{
IoHash Hash = Attachment.GetHash();
Writer.AddHash(Hash);
}
Writer.EndArray();
BinaryWriter MemWriter;
Writer.Save(MemWriter);
Sess.SetHeader({{"Content-Type", "application/x-ue-offer"}, {"UE-Session", m_SessionId}, {"UE-Request", RequestIdString}});
Sess.SetBody(cpr::Body{(const char*)MemWriter.Data(), MemWriter.Size()});
cpr::Response FilterResponse = Sess.Post();
if (FilterResponse.status_code == 200)
{
IoBuffer ResponseBuffer(IoBuffer::Wrap, FilterResponse.text.data(), FilterResponse.text.size());
CbObject ResponseObject = LoadCompactBinaryObject(ResponseBuffer);
for (auto& Entry : ResponseObject["need"])
{
ZEN_ASSERT(Entry.IsHash());
AttachmentsToSend.push_back(Entry.AsHash());
}
}
}
// Prepare package for send
CbPackage SendPackage;
SendPackage.SetObject(Package.GetObject(), Package.GetObjectHash());
for (const IoHash& AttachmentCid : AttachmentsToSend)
{
const CbAttachment* Attachment = Package.FindAttachment(AttachmentCid);
if (Attachment)
{
SendPackage.AddAttachment(*Attachment);
}
else
{
// This should be an error -- server asked to have something we can't find
}
}
// Transmit package payload
CompositeBuffer Message = FormatPackageMessageBuffer(SendPackage);
SharedBuffer FlatMessage = Message.Flatten();
Sess.SetHeader({{"Content-Type", "application/x-ue-cbpkg"}, {"UE-Session", m_SessionId}, {"UE-Request", RequestIdString}});
Sess.SetBody(cpr::Body{(const char*)FlatMessage.GetData(), FlatMessage.GetSize()});
cpr::Response FilterResponse = Sess.Post();
if (!IsHttpSuccessCode(FilterResponse.status_code))
{
return FromCprResponse(FilterResponse);
}
IoBuffer ResponseBuffer(IoBuffer::Clone, FilterResponse.text.data(), FilterResponse.text.size());
if (auto It = FilterResponse.header.find("Content-Type"); It != FilterResponse.header.end())
{
HttpContentType ContentType = ParseContentType(It->second);
ResponseBuffer.SetContentType(ContentType);
}
return {.StatusCode = int(FilterResponse.status_code), .ResponsePayload = ResponseBuffer};
}
HttpClient::Response
HttpClient::Put(std::string_view Url, IoBuffer Payload)
{
ZEN_UNUSED(Url);
ZEN_UNUSED(Payload);
return {};
}
HttpClient::Response
HttpClient::Get(std::string_view Url)
{
ZEN_UNUSED(Url);
return {};
}
HttpClient::Response
HttpClient::Delete(std::string_view Url)
{
ZEN_UNUSED(Url);
return {};
}
//////////////////////////////////////////////////////////////////////////
#if ZEN_WITH_TESTS
TEST_CASE("httpclient")
{
using namespace std::literals;
SUBCASE("client") {}
}
void
httpclient_forcelink()
{
}
#endif
} // namespace zen
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