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LibHTTP: Unify and generalise response handling logic

This commit is contained in:
AnotherTest 2020-05-05 09:47:40 +04:30 committed by Andreas Kling
parent 3dd0f755d0
commit 155853afb2
8 changed files with 442 additions and 400 deletions

View file

@ -36,193 +36,6 @@
namespace HTTP {
static ByteBuffer handle_content_encoding(const ByteBuffer& buf, const String& content_encoding)
{
#ifdef HTTPSJOB_DEBUG
dbg() << "HttpsJob::handle_content_encoding: buf has content_encoding = " << content_encoding;
#endif
if (content_encoding == "gzip") {
if (!Core::Gzip::is_compressed(buf)) {
dbg() << "HttpsJob::handle_content_encoding: buf is not gzip compressed!";
}
#ifdef HTTPSJOB_DEBUG
dbg() << "HttpsJob::handle_content_encoding: buf is gzip compressed!";
#endif
auto uncompressed = Core::Gzip::decompress(buf);
if (!uncompressed.has_value()) {
dbg() << "HttpsJob::handle_content_encoding: Gzip::decompress() failed. Returning original buffer.";
return buf;
}
#ifdef HTTPSJOB_DEBUG
dbg() << "HttpsJob::handle_content_encoding: Gzip::decompress() successful.\n"
<< " Input size = " << buf.size() << "\n"
<< " Output size = " << uncompressed.value().size();
#endif
return uncompressed.value();
}
return buf;
}
HttpsJob::HttpsJob(const HttpRequest& request)
: m_request(request)
{
}
HttpsJob::~HttpsJob()
{
m_socket = nullptr;
}
void HttpsJob::on_socket_connected()
{
m_socket->on_tls_ready_to_write = [&](TLS::TLSv12& tls) {
if (m_sent_data)
return;
m_sent_data = true;
auto raw_request = m_request.to_raw_request();
#if 0
dbg() << "HttpsJob: raw_request:";
dbg() << String::copy(raw_request).characters();
#endif
bool success = tls.write(raw_request);
if (!success)
deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::TransmissionFailed); });
};
m_socket->on_tls_ready_to_read = [&](TLS::TLSv12& tls) {
#ifdef HTTPS_DEBUG
dbg() << " ON TLS READY TO READ: " << (u16)m_state;
#endif
if (is_cancelled())
return;
if (m_state == State::InStatus) {
if (!tls.can_read_line()) {
dbg() << " cannot read line";
return;
}
auto line = tls.read_line(PAGE_SIZE);
if (line.is_null()) {
fprintf(stderr, "HttpsJob: Expected HTTP status\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::TransmissionFailed); });
}
auto parts = String::copy(line, Chomp).split(' ');
if (parts.size() < 3) {
fprintf(stderr, "HttpsJob: Expected 3-part HTTP status, got '%s'\n", line.data());
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
bool ok;
m_code = parts[1].to_uint(ok);
if (!ok) {
fprintf(stderr, "HttpsJob: Expected numeric HTTP status\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
m_state = State::InHeaders;
return;
}
if (m_state == State::InHeaders) {
if (!tls.can_read_line())
return;
auto line = tls.read_line(PAGE_SIZE);
if (line.is_null()) {
fprintf(stderr, "HttpsJob: Expected HTTP header\n");
return did_fail(Core::NetworkJob::Error::ProtocolFailed);
}
auto chomped_line = String::copy(line, Chomp);
if (chomped_line.is_empty()) {
m_state = State::InBody;
return;
}
auto parts = chomped_line.split(':');
if (parts.is_empty()) {
fprintf(stderr, "HttpsJob: Expected HTTP header with key/value\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
auto name = parts[0];
if (chomped_line.length() < name.length() + 2) {
fprintf(stderr, "HttpsJob: Malformed HTTP header: '%s' (%zu)\n", chomped_line.characters(), chomped_line.length());
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
auto value = chomped_line.substring(name.length() + 2, chomped_line.length() - name.length() - 2);
m_headers.set(name, value);
#ifdef HTTPSJOB_DEBUG
dbg() << "HttpsJob: [" << name << "] = '" << value << "'";
#endif
return;
}
ASSERT(m_state == State::InBody);
ASSERT(tls.can_read());
while (tls.can_read())
read_body(tls);
if (!tls.is_established())
return finish_up();
};
}
void HttpsJob::read_body(TLS::TLSv12& tls)
{
auto payload = tls.read(64 * KB);
if (!payload) {
if (tls.eof())
return finish_up();
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
m_received_buffers.append(payload);
m_received_size += payload.size();
auto content_length_header = m_headers.get("Content-Length");
Optional<u32> content_length {};
if (content_length_header.has_value()) {
bool ok;
auto length = content_length_header.value().to_uint(ok);
if (ok)
content_length = length;
}
// This needs to be synchronous
// FIXME: Somehow enforce that this should not modify anything
did_progress(content_length, m_received_size);
if (content_length.has_value()) {
auto length = content_length.value();
if (m_received_size >= length) {
m_received_size = length;
finish_up();
}
}
}
void HttpsJob::finish_up()
{
m_state = State::Finished;
auto flattened_buffer = ByteBuffer::create_uninitialized(m_received_size);
u8* flat_ptr = flattened_buffer.data();
for (auto& received_buffer : m_received_buffers) {
memcpy(flat_ptr, received_buffer.data(), received_buffer.size());
flat_ptr += received_buffer.size();
}
m_received_buffers.clear();
auto content_encoding = m_headers.get("Content-Encoding");
if (content_encoding.has_value()) {
flattened_buffer = handle_content_encoding(flattened_buffer, content_encoding.value());
}
auto response = HttpResponse::create(m_code, move(m_headers), move(flattened_buffer));
deferred_invoke([this, response](auto&) {
did_finish(move(response));
});
}
void HttpsJob::start()
{
ASSERT(!m_socket);
@ -268,4 +81,57 @@ void HttpsJob::shutdown()
remove_child(*m_socket);
m_socket = nullptr;
}
void HttpsJob::read_while_data_available(Function<IterationDecision()> read)
{
while (m_socket->can_read()) {
if (read() == IterationDecision::Break)
break;
}
}
void HttpsJob::register_on_ready_to_read(Function<void()> callback)
{
m_socket->on_tls_ready_to_read = [callback = move(callback)](auto&) {
callback();
};
}
void HttpsJob::register_on_ready_to_write(Function<void()> callback)
{
m_socket->on_tls_ready_to_write = [callback = move(callback)](auto&) {
callback();
};
}
bool HttpsJob::can_read_line()
{
return m_socket->can_read_line();
}
ByteBuffer HttpsJob::read_line(size_t size)
{
return m_socket->read_line(size);
}
ByteBuffer HttpsJob::receive(size_t size)
{
return m_socket->read(size);
}
bool HttpsJob::can_read() const
{
return m_socket->can_read();
}
bool HttpsJob::eof() const
{
return m_socket->eof();
}
bool HttpsJob::write(const ByteBuffer& data)
{
return m_socket->write(data);
}
}