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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/CGzip.h>
#include <LibCore/CHttpJob.h>
#include <LibCore/CHttpResponse.h>
#include <LibCore/CTCPSocket.h>
#include <stdio.h>
#include <unistd.h>
//#define CHTTPJOB_DEBUG
namespace Core {
static ByteBuffer handle_content_encoding(const ByteBuffer& buf, const String& content_encoding)
{
#ifdef CHTTPJOB_DEBUG
dbg() << "CHttpJob::handle_content_encoding: buf has content_encoding = " << content_encoding;
#endif
if (content_encoding == "gzip") {
if (!CGzip::is_compressed(buf)) {
dbg() << "CHttpJob::handle_content_encoding: buf is not gzip compressed!";
}
#ifdef CHTTPJOB_DEBUG
dbg() << "CHttpJob::handle_content_encoding: buf is gzip compressed!";
#endif
auto uncompressed = CGzip::decompress(buf);
if (!uncompressed.has_value()) {
dbg() << "CHttpJob::handle_content_encoding: Gzip::decompress() failed. Returning original buffer.";
return buf;
}
#ifdef CHTTPJOB_DEBUG
dbg() << "CHttpJob::handle_content_encoding: Gzip::decompress() successful.\n"
<< " Input size = " << buf.size() << "\n"
<< " Output size = " << uncompressed.value().size();
#endif
return uncompressed.value();
}
return buf;
}
HttpJob::HttpJob(const HttpRequest& request)
: m_request(request)
{
}
HttpJob::~HttpJob()
{
}
void HttpJob::on_socket_connected()
{
auto raw_request = m_request.to_raw_request();
#if 0
dbg() << "CHttpJob: raw_request:";
dbg() << String::copy(raw_request).characters();
#endif
bool success = m_socket->send(raw_request);
if (!success)
return deferred_invoke([this](auto&) { did_fail(NetworkJob::Error::TransmissionFailed); });
m_socket->on_ready_to_read = [&] {
if (is_cancelled())
return;
if (m_state == State::InStatus) {
if (!m_socket->can_read_line())
return;
auto line = m_socket->read_line(PAGE_SIZE);
if (line.is_null()) {
fprintf(stderr, "CHttpJob: Expected HTTP status\n");
return deferred_invoke([this](auto&) { did_fail(NetworkJob::Error::TransmissionFailed); });
}
auto parts = String::copy(line, Chomp).split(' ');
if (parts.size() < 3) {
fprintf(stderr, "CHttpJob: Expected 3-part HTTP status, got '%s'\n", line.data());
return deferred_invoke([this](auto&) { did_fail(NetworkJob::Error::ProtocolFailed); });
}
bool ok;
m_code = parts[1].to_uint(ok);
if (!ok) {
fprintf(stderr, "CHttpJob: Expected numeric HTTP status\n");
return deferred_invoke([this](auto&) { did_fail(NetworkJob::Error::ProtocolFailed); });
}
m_state = State::InHeaders;
return;
}
if (m_state == State::InHeaders) {
if (!m_socket->can_read_line())
return;
auto line = m_socket->read_line(PAGE_SIZE);
if (line.is_null()) {
fprintf(stderr, "CHttpJob: Expected HTTP header\n");
return did_fail(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, "CHttpJob: Expected HTTP header with key/value\n");
return deferred_invoke([this](auto&) { did_fail(NetworkJob::Error::ProtocolFailed); });
}
auto name = parts[0];
if (chomped_line.length() < name.length() + 2) {
fprintf(stderr, "CHttpJob: Malformed HTTP header: '%s' (%zu)\n", chomped_line.characters(), chomped_line.length());
return deferred_invoke([this](auto&) { did_fail(NetworkJob::Error::ProtocolFailed); });
}
auto value = chomped_line.substring(name.length() + 2, chomped_line.length() - name.length() - 2);
m_headers.set(name, value);
#ifdef CHTTPJOB_DEBUG
dbg() << "CHttpJob: [" << name << "] = '" << value << "'";
#endif
return;
}
ASSERT(m_state == State::InBody);
ASSERT(m_socket->can_read());
auto payload = m_socket->receive(64 * KB);
if (!payload) {
if (m_socket->eof())
return finish_up();
return deferred_invoke([this](auto&) { did_fail(NetworkJob::Error::ProtocolFailed); });
}
m_received_buffers.append(payload);
m_received_size += payload.size();
auto content_length_header = m_headers.get("Content-Length");
if (content_length_header.has_value()) {
bool ok;
if (m_received_size >= content_length_header.value().to_uint(ok) && ok)
return finish_up();
}
};
}
void HttpJob::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 HttpJob::start()
{
ASSERT(!m_socket);
m_socket = TCPSocket::construct(this);
m_socket->on_connected = [this] {
#ifdef CHTTPJOB_DEBUG
dbg() << "CHttpJob: on_connected callback";
#endif
on_socket_connected();
};
bool success = m_socket->connect(m_request.url().host(), m_request.url().port());
if (!success) {
deferred_invoke([this](auto&) {
return did_fail(NetworkJob::Error::ConnectionFailed);
});
}
}
void HttpJob::shutdown()
{
if (!m_socket)
return;
m_socket->on_ready_to_read = nullptr;
m_socket->on_connected = nullptr;
remove_child(*m_socket);
m_socket = nullptr;
}
}
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