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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <LibGemini/GeminiResponse.h>
#include <LibGemini/Job.h>
#include <stdio.h>
#include <unistd.h>
namespace Gemini {
Job::Job(const GeminiRequest& request, OutputStream& output_stream)
: Core::NetworkJob(output_stream)
, m_request(request)
{
}
Job::~Job()
{
}
void Job::flush_received_buffers()
{
for (size_t i = 0; i < m_received_buffers.size(); ++i) {
auto& payload = m_received_buffers[i];
auto written = do_write(payload);
m_received_size -= written;
if (written == payload.size()) {
// FIXME: Make this a take-first-friendly object?
m_received_buffers.take_first();
continue;
}
VERIFY(written < payload.size());
payload = payload.slice(written, payload.size() - written);
return;
}
}
void Job::on_socket_connected()
{
register_on_ready_to_write([this] {
if (m_sent_data)
return;
m_sent_data = true;
auto raw_request = m_request.to_raw_request();
if constexpr (JOB_DEBUG) {
dbgln("Job: raw_request:");
dbgln("{}", String::copy(raw_request));
}
bool success = write(raw_request);
if (!success)
deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::TransmissionFailed); });
});
register_on_ready_to_read([this] {
if (is_cancelled())
return;
if (m_state == State::InStatus) {
if (!can_read_line())
return;
auto line = read_line(PAGE_SIZE);
if (line.is_null()) {
fprintf(stderr, "Job: Expected status line\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::TransmissionFailed); });
}
auto parts = line.split_limit(' ', 2);
if (parts.size() != 2) {
warnln("Job: Expected 2-part status line, got '{}'", line);
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
auto status = parts[0].to_uint();
if (!status.has_value()) {
fprintf(stderr, "Job: Expected numeric status code\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
m_status = status.value();
m_meta = parts[1];
if (m_status >= 10 && m_status < 20) {
m_state = State::Finished;
} else if (m_status >= 20 && m_status < 30) {
m_state = State::InBody;
} else if (m_status >= 30 && m_status < 40) {
m_state = State::Finished;
} else if (m_status >= 40 && m_status < 50) {
m_state = State::Finished;
} else if (m_status >= 50 && m_status < 60) {
m_state = State::Finished;
} else if (m_status >= 60 && m_status < 70) {
m_state = State::InBody;
} else {
fprintf(stderr, "Job: Expected status between 10 and 69; instead got %d\n", m_status);
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
return;
}
VERIFY(m_state == State::InBody || m_state == State::Finished);
read_while_data_available([&] {
auto read_size = 64 * KiB;
auto payload = receive(read_size);
if (!payload) {
if (eof()) {
finish_up();
return IterationDecision::Break;
}
if (should_fail_on_empty_payload()) {
deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
return IterationDecision::Break;
}
}
m_received_buffers.append(payload);
m_received_size += payload.size();
flush_received_buffers();
deferred_invoke([this](auto&) { did_progress({}, m_received_size); });
return IterationDecision::Continue;
});
if (!is_established()) {
dbgln_if(JOB_DEBUG, "Connection appears to have closed, finishing up");
finish_up();
}
});
}
void Job::finish_up()
{
m_state = State::Finished;
flush_received_buffers();
if (m_received_size != 0) {
// We have to wait for the client to consume all the downloaded data
// before we can actually call `did_finish`. in a normal flow, this should
// never be hit since the client is reading as we are writing, unless there
// are too many concurrent downloads going on.
deferred_invoke([this](auto&) {
finish_up();
});
return;
}
auto response = GeminiResponse::create(m_status, m_meta);
deferred_invoke([this, response](auto&) {
did_finish(move(response));
});
}
}
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