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http_client: reduce number of packets sent for small bodies

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This commit is contained in:
jeffro256 2023-03-18 20:06:24 -05:00
parent c5d10a4ac4
commit 0ae5c91e50
1 changed files with 26 additions and 16 deletions
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42
contrib/epee/include/net/http_client.h
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@ -199,8 +199,18 @@ namespace net_utils
}
}
// This magic var determines the maximum length for when copying the body message in
// memory is faster/more preferable than the round-trip time for one packet
constexpr size_t BODY_NO_COPY_CUTOFF = 128 * 1024; // ~262 KB or ~175 packets
// Maximum expected total headers bytes
constexpr size_t HEADER_RESERVE_SIZE = 2048;
const bool do_copy_body = body.size() <= BODY_NO_COPY_CUTOFF;
const size_t req_buff_cap = HEADER_RESERVE_SIZE + (do_copy_body ? body.size() : 0);
std::string req_buff{};
req_buff.reserve(2048);
req_buff.reserve(req_buff_cap);
req_buff.append(method.data(), method.size()).append(" ").append(uri.data(), uri.size()).append(" HTTP/1.1\r\n");
add_field(req_buff, "Host", m_host_buff);
add_field(req_buff, "Content-Length", std::to_string(body.size()));
@ -209,9 +219,7 @@ namespace net_utils
for(const auto& field : additional_params)
add_field(req_buff, field);
for (unsigned sends = 0; sends < 2; ++sends)
{
const std::size_t initial_size = req_buff.size();
const auto auth = m_auth.get_auth_field(method, uri);
if (auth)
add_field(req_buff, *auth);
@ -219,11 +227,21 @@ namespace net_utils
req_buff += "\r\n";
//--
bool res = m_net_client.send(req_buff, timeout);
CHECK_AND_ASSERT_MES(res, false, "HTTP_CLIENT: Failed to SEND");
if(body.size())
if (do_copy_body) // small body
{
// Copy headers + body together and potentially send one fewer packet
req_buff.append(body.data(), body.size());
const bool res = m_net_client.send(req_buff, timeout);
CHECK_AND_ASSERT_MES(res, false, "HTTP_CLIENT: Failed to SEND");
}
else // large body
{
// Send headers and body seperately to avoid copying heavy body message
bool res = m_net_client.send(req_buff, timeout);
CHECK_AND_ASSERT_MES(res, false, "HTTP_CLIENT: Failed to SEND");
res = m_net_client.send(body, timeout);
CHECK_AND_ASSERT_MES(res, false, "HTTP_CLIENT: Failed to SEND");
CHECK_AND_ASSERT_MES(res, false, "HTTP_CLIENT: Failed to SEND");
}
m_response_info.clear();
m_state = reciev_machine_state_header;
@ -236,19 +254,11 @@ namespace net_utils
return true;
}
switch (m_auth.handle_401(m_response_info))
if (m_auth.handle_401(m_response_info) == http_client_auth::kParseFailure)
{
case http_client_auth::kSuccess:
break;
case http_client_auth::kBadPassword:
sends = 2;
break;
default:
case http_client_auth::kParseFailure:
LOG_ERROR("Bad server response for authentication");
return false;
}
req_buff.resize(initial_size); // rollback for new auth generation
}
LOG_ERROR("Client has incorrect username/password for server requiring authentication");
return false;