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127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
#include "webcc/http_session.h"
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#include <utility> // for move()
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#include "boost/asio/write.hpp"
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#include "webcc/http_request_handler.h"
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#include "webcc/logger.h"
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using boost::asio::ip::tcp;
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namespace webcc {
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HttpSession::HttpSession(tcp::socket socket, HttpRequestHandler* handler)
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: socket_(std::move(socket)),
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buffer_(kBufferSize),
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request_handler_(handler),
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request_parser_(&request_) {
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}
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void HttpSession::Start() {
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DoRead();
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}
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void HttpSession::Close() {
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LOG_INFO("Close socket...");
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boost::system::error_code ec;
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socket_.close(ec);
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if (ec) {
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LOG_ERRO("Socket close error (%s).", ec.message().c_str());
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}
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}
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void HttpSession::SetResponseContent(std::string&& content,
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const std::string& type) {
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response_.SetContent(std::move(content), true);
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response_.SetContentType(type);
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}
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void HttpSession::SendResponse(HttpStatus::Enum status) {
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response_.set_status(status);
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response_.UpdateStartLine();
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DoWrite();
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}
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void HttpSession::DoRead() {
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socket_.async_read_some(boost::asio::buffer(buffer_),
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std::bind(&HttpSession::OnRead, shared_from_this(),
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std::placeholders::_1,
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std::placeholders::_2));
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}
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void HttpSession::OnRead(boost::system::error_code ec, std::size_t length) {
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if (ec) {
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LOG_ERRO("Socket read error (%s).", ec.message().c_str());
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if (ec != boost::asio::error::operation_aborted) {
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Close();
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}
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return;
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}
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if (!request_parser_.Parse(buffer_.data(), length)) {
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// Bad request.
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LOG_ERRO("Failed to parse HTTP request.");
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response_ = HttpResponse::Fault(HttpStatus::kBadRequest);
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DoWrite();
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return;
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}
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if (!request_parser_.finished()) {
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// Continue to read the request.
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DoRead();
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return;
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}
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LOG_VERB("HTTP request:\n%s", request_.Dump(4, "> ").c_str());
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// Enqueue this session.
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// Some worker thread will handle it later.
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request_handler_->Enqueue(shared_from_this());
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}
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void HttpSession::DoWrite() {
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LOG_VERB("HTTP response:\n%s", response_.Dump(4, "> ").c_str());
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boost::asio::async_write(socket_, response_.ToBuffers(),
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std::bind(&HttpSession::OnWrite, shared_from_this(),
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std::placeholders::_1,
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std::placeholders::_2));
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}
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// NOTE:
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// This write handler will be called from main thread (the thread calling
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// io_context.run), even though AsyncWrite() is invoked by worker threads.
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// This is ensured by Asio.
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void HttpSession::OnWrite(boost::system::error_code ec, std::size_t length) {
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if (ec) {
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LOG_ERRO("Socket write error (%s).", ec.message().c_str());
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if (ec != boost::asio::error::operation_aborted) {
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Close();
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}
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} else {
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LOG_INFO("Response has been sent back, length: %u.", length);
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Shutdown();
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Close(); // Necessary even after shutdown!
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}
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}
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// Socket close VS. shutdown:
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// https://stackoverflow.com/questions/4160347/close-vs-shutdown-socket
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void HttpSession::Shutdown() {
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LOG_INFO("Shutdown socket...");
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// Initiate graceful connection closure.
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boost::system::error_code ec;
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socket_.shutdown(tcp::socket::shutdown_both, ec);
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if (ec) {
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LOG_ERRO("Socket shutdown error (%s).", ec.message().c_str());
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}
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}
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} // namespace webcc
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