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// Copyright Epic Games, Inc. All Rights Reserved.
#include "casstore.h"
#include <zencore/logging.h>
#include <zencore/streamutil.h>
#include <gsl/gsl-lite.hpp>
namespace zen {
HttpCasService::HttpCasService(CasStore& Store) : m_CasStore(Store)
{
m_Router.AddPattern("cas", "([0-9A-Fa-f]{40})");
m_Router.RegisterRoute(
"batch",
[this](HttpRouterRequest& Req) {
HttpServerRequest& ServerRequest = Req.ServerRequest();
IoBuffer Payload = ServerRequest.ReadPayload();
uint64_t EntryCount = Payload.Size() / sizeof(IoHash);
if ((EntryCount * sizeof(IoHash)) != Payload.Size())
{
return ServerRequest.WriteResponse(HttpResponseCode::BadRequest);
}
const IoHash* Hashes = reinterpret_cast<const IoHash*>(Payload.Data());
std::vector<IoBuffer> Values;
MemoryOutStream HeaderStream;
BinaryWriter HeaderWriter(HeaderStream);
Values.emplace_back(); // Placeholder for header
// Build response header
HeaderWriter << uint32_t(0x12340000) << uint32_t(0);
for (uint64_t i = 0; i < EntryCount; ++i)
{
IoHash ChunkHash = Hashes[i];
IoBuffer Value = m_CasStore.FindChunk(ChunkHash);
if (Value)
{
Values.emplace_back(std::move(Value));
HeaderWriter << ChunkHash << uint64_t(Value.Size());
}
}
// Make real header
const_cast<uint32_t*>(reinterpret_cast<const uint32_t*>(HeaderStream.Data()))[1] = uint32_t(Values.size() - 1);
Values[0] = IoBufferBuilder::MakeCloneFromMemory(HeaderStream.Data(), HeaderStream.Size());
ServerRequest.WriteResponse(HttpResponseCode::OK, HttpContentType::kBinary, Values);
},
HttpVerb::kPost);
m_Router.RegisterRoute(
"{cas}",
[this](HttpRouterRequest& Req) {
IoHash Hash = IoHash::FromHexString(Req.GetCapture(1));
ZEN_DEBUG("CAS request for {}", Hash);
HttpServerRequest& ServerRequest = Req.ServerRequest();
switch (ServerRequest.RequestVerb())
{
case HttpVerb::kGet:
case HttpVerb::kHead:
{
if (IoBuffer Value = m_CasStore.FindChunk(Hash))
{
return ServerRequest.WriteResponse(HttpResponseCode::OK, HttpContentType::kBinary, Value);
}
return ServerRequest.WriteResponse(HttpResponseCode::NotFound);
}
break;
case HttpVerb::kPut:
{
IoBuffer Payload = ServerRequest.ReadPayload();
IoHash PayloadHash = IoHash::HashBuffer(Payload.Data(), Payload.Size());
// URI hash must match content hash
if (PayloadHash != Hash)
{
return ServerRequest.WriteResponse(HttpResponseCode::BadRequest);
}
m_CasStore.InsertChunk(Payload, PayloadHash);
return ServerRequest.WriteResponse(HttpResponseCode::OK);
}
break;
}
},
HttpVerb::kGet | HttpVerb::kPut | HttpVerb::kHead);
}
const char*
HttpCasService::BaseUri() const
{
return "/cas/";
}
void
HttpCasService::HandleRequest(zen::HttpServerRequest& Request)
{
if (Request.RelativeUri().empty())
{
// Root URI request
switch (Request.RequestVerb())
{
case HttpVerb::kPut:
case HttpVerb::kPost:
{
IoBuffer Payload = Request.ReadPayload();
IoHash PayloadHash = IoHash::HashBuffer(Payload.Data(), Payload.Size());
ZEN_DEBUG("CAS POST request for {} ({} bytes)", PayloadHash, Payload.Size());
auto InsertResult = m_CasStore.InsertChunk(Payload, PayloadHash);
if (InsertResult.New)
{
return Request.WriteResponse(HttpResponseCode::Created);
}
else
{
return Request.WriteResponse(HttpResponseCode::OK);
}
}
break;
case HttpVerb::kGet:
case HttpVerb::kHead:
break;
default:
break;
}
}
else
{
m_Router.HandleRequest(Request);
}
}
} // namespace zen
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