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@ -3,23 +3,40 @@
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#include "webcc/logger.h"
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using boost::asio::ip::tcp;
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using namespace std::placeholders;
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namespace webcc {
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Client::Client()
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: timer_(io_context_),
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ssl_verify_(true),
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buffer_size_(kBufferSize),
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timeout_(kMaxReadSeconds),
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closed_(false),
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timer_canceled_(false) {
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#if WEBCC_ENABLE_SSL
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Client::Client(boost::asio::io_context& io_context,
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boost::asio::ssl::context& ssl_context)
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: io_context_(io_context),
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ssl_context_(ssl_context),
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resolver_(io_context),
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deadline_timer_(io_context) {
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}
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#else
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Client::Client(boost::asio::io_context& io_context)
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: io_context_(io_context),
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resolver_(io_context),
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deadline_timer_(io_context) {
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}
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Error Client::Request(RequestPtr request, bool connect, bool stream) {
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closed_ = false;
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timer_canceled_ = false;
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#endif // WEBCC_ENABLE_SSL
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Error Client::Request(RequestPtr request, bool stream) {
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LOG_VERB("Request begin");
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request_finished_ = false;
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error_ = Error{};
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request_ = request;
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length_read_ = 0;
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response_.reset(new Response{});
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response_parser_.Init(response_.get(), stream);
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@ -35,246 +52,312 @@ Error Client::Request(RequestPtr request, bool connect, bool stream) {
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// have Content-Length;
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// - If request.Accept-Encoding is "identity", the response will have
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// Content-Length.
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if (request->method() == methods::kHead) {
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if (request_->method() == methods::kHead) {
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response_parser_.set_ignore_body(true);
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} else {
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// Reset in case the connection is persistent.
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response_parser_.set_ignore_body(false);
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}
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io_context_.restart();
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if (connect) {
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// No existing socket connection was specified, create a new one.
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Connect(request);
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if (error_) {
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return error_;
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}
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if (!connected_) {
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AsyncConnect();
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} else {
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AsyncWrite();
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}
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WriteRequest(request);
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if (error_) {
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return error_;
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}
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// Wait for the request to be finished.
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std::unique_lock<std::mutex> response_lock{ request_mutex_ };
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request_cv_.wait(response_lock, [=] { return request_finished_; });
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ReadResponse();
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LOG_VERB("Request end");
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return error_;
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}
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void Client::Close() {
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if (closed_) {
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if (!connected_) {
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//resolver_.cancel(); // TODO
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if (socket_) {
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// Cancel any async operations on the socket.
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LOG_VERB("Close socket");
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socket_->Close();
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// Make sure the current request, if any, could be finished.
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FinishRequest();
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}
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return;
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}
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closed_ = true;
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LOG_INFO("Close socket...");
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connected_ = false;
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if (socket_) {
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LOG_INFO("Shutdown & close socket");
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socket_->Shutdown();
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socket_->Close();
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// Make sure the current request, if any, could be finished.
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FinishRequest();
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}
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LOG_INFO("Socket closed");
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}
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void Client::Connect(RequestPtr request) {
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if (request->url().scheme() == "https") {
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void Client::AsyncConnect() {
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if (request_->url().scheme() == "https") {
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#if WEBCC_ENABLE_SSL
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socket_.reset(new SslSocket{ io_context_, ssl_verify_ });
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DoConnect(request, "443");
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socket_.reset(new SslSocket{ io_context_, ssl_context_, ssl_verify_ });
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AsyncResolve("443");
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#else
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LOG_ERRO("SSL/HTTPS support is not enabled.");
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error_.Set(Error::kSyntaxError, "SSL/HTTPS is not supported");
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FinishRequest();
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#endif // WEBCC_ENABLE_SSL
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} else {
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socket_.reset(new Socket{ io_context_ });
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DoConnect(request, "80");
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AsyncResolve("80");
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}
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}
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void Client::DoConnect(RequestPtr request, const std::string& default_port) {
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tcp::resolver resolver(io_context_);
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std::string port = request->port();
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void Client::AsyncResolve(const std::string& default_port) {
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std::string port = request_->port();
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if (port.empty()) {
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port = default_port;
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}
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LOG_VERB("Resolve host (%s)...", request->host().c_str());
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boost::system::error_code ec;
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LOG_VERB("Resolve host (%s)", request_->host().c_str());
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// The protocol depends on the `host`, both V4 and V6 are supported.
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auto endpoints = resolver.resolve(request->host(), port, ec);
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resolver_.async_resolve(request_->host(), port,
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std::bind(&Client::OnResolve, this, _1, _2));
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}
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void Client::OnResolve(boost::system::error_code ec,
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tcp::resolver::results_type endpoints) {
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if (ec) {
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LOG_ERRO("Host resolve error (%s): %s, %s.", ec.message().c_str(),
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request->host().c_str(), port.c_str());
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LOG_ERRO("Host resolve error (%s)", ec.message().c_str());
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error_.Set(Error::kResolveError, "Host resolve error");
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FinishRequest();
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return;
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}
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LOG_VERB("Connect to server...");
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LOG_VERB("Connect socket");
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// Use sync API directly since we don't need timeout control.
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AsyncWaitDeadlineTimer(connect_timeout_);
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if (!socket_->Connect(request->host(), endpoints)) {
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error_.Set(Error::kConnectError, "Endpoint connect error");
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Close();
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return;
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socket_->AsyncConnect(request_->host(), endpoints,
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std::bind(&Client::OnConnect, this, _1, _2));
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}
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void Client::OnConnect(boost::system::error_code ec, tcp::endpoint) {
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LOG_VERB("On connect");
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StopDeadlineTimer();
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if (ec) {
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if (ec == boost::asio::error::operation_aborted) {
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// Socket has been closed by OnDeadlineTimer() or Close().
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LOG_WARN("Connect operation aborted");
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} else {
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LOG_INFO("Connect error");
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// No need to close socket since no async operation is on it.
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// socket_->Close();
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}
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LOG_VERB("Socket connected.");
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}
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error_.Set(Error::kConnectError, "Socket connect error");
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FinishRequest();
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return;
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}
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void Client::WriteRequest(RequestPtr request) {
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LOG_VERB("HTTP request:\n%s", request->Dump().c_str());
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LOG_INFO("Socket connected");
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// NOTE:
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// It doesn't make much sense to set a timeout for socket write.
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// I find that it's almost impossible to simulate a situation in the server
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// side to test this timeout.
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connected_ = true;
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// Use sync API directly since we don't need timeout control.
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AsyncWrite();
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}
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boost::system::error_code ec;
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void Client::AsyncWrite() {
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LOG_VERB("Request:\n%s", request_->Dump().c_str());
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if (socket_->Write(request->GetPayload(), &ec)) {
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// Write request body.
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auto body = request->body();
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body->InitPayload();
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for (auto p = body->NextPayload(true); !p.empty();
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p = body->NextPayload(true)) {
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if (!socket_->Write(p, &ec)) {
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break;
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}
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}
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}
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socket_->AsyncWrite(request_->GetPayload(),
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std::bind(&Client::OnWrite, this, _1, _2));
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}
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void Client::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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Close();
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error_.Set(Error::kSocketWriteError, "Socket write error");
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HandleWriteError(ec);
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return;
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}
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LOG_INFO("Request sent.");
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request_->body()->InitPayload();
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AsyncWriteBody();
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}
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void Client::ReadResponse() {
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LOG_VERB("Read response (timeout: %ds)...", timeout_);
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void Client::AsyncWriteBody() {
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auto p = request_->body()->NextPayload(true);
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if (!p.empty()) {
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socket_->AsyncWrite(p, std::bind(&Client::OnWriteBody, this, _1, _2));
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} else {
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LOG_INFO("Request send");
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DoReadResponse();
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// Start the read deadline timer.
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AsyncWaitDeadlineTimer(read_timeout_);
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if (!error_) {
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LOG_VERB("HTTP response:\n%s", response_->Dump().c_str());
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// Start to read response.
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AsyncRead();
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}
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}
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void Client::DoReadResponse() {
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boost::system::error_code ec = boost::asio::error::would_block;
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std::size_t length = 0;
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// The read handler.
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auto handler = [&ec, &length](boost::system::error_code inner_ec,
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std::size_t inner_length) {
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ec = inner_ec;
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length = inner_length;
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};
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void Client::OnWriteBody(boost::system::error_code ec, std::size_t legnth) {
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if (ec) {
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HandleWriteError(ec);
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return;
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}
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while (true) {
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ec = boost::asio::error::would_block;
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length = 0;
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// Continue to write the next payload of body.
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AsyncWriteBody();
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}
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socket_->AsyncReadSome(std::move(handler), &buffer_);
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void Client::HandleWriteError(boost::system::error_code ec) {
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if (ec == boost::asio::error::operation_aborted) {
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// Socket has been closed by OnDeadlineTimer() or Close().
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LOG_WARN("Write operation aborted");
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} else {
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LOG_ERRO("Socket write error (%s)", ec.message().c_str());
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Close();
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}
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// Start the timer.
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DoWaitTimer();
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error_.Set(Error::kSocketWriteError, "Socket write error");
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FinishRequest();
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}
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// Block until the asynchronous operation has completed.
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do {
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io_context_.run_one();
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} while (ec == boost::asio::error::would_block);
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void Client::AsyncRead() {
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socket_->AsyncReadSome(std::bind(&Client::OnRead, this, _1, _2), &buffer_);
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}
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// Stop the timer.
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CancelTimer();
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void Client::OnRead(boost::system::error_code ec, std::size_t length) {
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StopDeadlineTimer();
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// The error normally is caused by timeout. See OnTimer().
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if (ec || length == 0) {
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if (ec) {
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if (ec == boost::asio::error::operation_aborted) {
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// Socket has been closed by OnDeadlineTimer() or Close().
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LOG_WARN("Read operation aborted");
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} else {
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LOG_ERRO("Socket read error (%s)", ec.message().c_str());
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Close();
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}
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error_.Set(Error::kSocketReadError, "Socket read error");
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LOG_ERRO("Socket read error (%s).", ec.message().c_str());
|
|
|
|
|
break;
|
|
|
|
|
FinishRequest();
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
LOG_INFO("Read data, length: %u.", length);
|
|
|
|
|
length_read_ += length;
|
|
|
|
|
|
|
|
|
|
LOG_INFO("Read length: %u", length);
|
|
|
|
|
|
|
|
|
|
// Parse the piece of data just read.
|
|
|
|
|
if (!response_parser_.Parse(buffer_.data(), length)) {
|
|
|
|
|
LOG_ERRO("Failed to parse the response");
|
|
|
|
|
Close();
|
|
|
|
|
error_.Set(Error::kParseError, "HTTP parse error");
|
|
|
|
|
LOG_ERRO("Failed to parse the HTTP response.");
|
|
|
|
|
break;
|
|
|
|
|
error_.Set(Error::kParseError, "Response parse error");
|
|
|
|
|
FinishRequest();
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Inform progress callback if it's specified.
|
|
|
|
|
if (progress_callback_) {
|
|
|
|
|
if (response_parser_.header_ended()) {
|
|
|
|
|
// NOTE: Need to get rid of the header length.
|
|
|
|
|
progress_callback_(length_read_ - response_parser_.header_length(),
|
|
|
|
|
response_parser_.content_length());
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (response_parser_.finished()) {
|
|
|
|
|
// Stop trying to read once all content has been received, because
|
|
|
|
|
// some servers will block extra call to read_some().
|
|
|
|
|
LOG_VERB("Response:\n%s", response_->Dump().c_str());
|
|
|
|
|
|
|
|
|
|
if (response_->IsConnectionKeepAlive()) {
|
|
|
|
|
// Close the timer but keep the socket connection.
|
|
|
|
|
LOG_INFO("Keep the socket connection alive.");
|
|
|
|
|
LOG_INFO("Keep the socket connection alive");
|
|
|
|
|
} else {
|
|
|
|
|
Close();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Stop reading.
|
|
|
|
|
LOG_INFO("Finished to read the HTTP response.");
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
// Stop trying to read once all content has been received, because some
|
|
|
|
|
// servers will block extra call to read_some().
|
|
|
|
|
|
|
|
|
|
LOG_INFO("Finished to read the response");
|
|
|
|
|
FinishRequest();
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Continue to read the response.
|
|
|
|
|
AsyncRead();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Client::DoWaitTimer() {
|
|
|
|
|
LOG_VERB("Wait timer asynchronously.");
|
|
|
|
|
timer_.expires_after(std::chrono::seconds(timeout_));
|
|
|
|
|
timer_.async_wait(std::bind(&Client::OnTimer, this, std::placeholders::_1));
|
|
|
|
|
void Client::AsyncWaitDeadlineTimer(int seconds) {
|
|
|
|
|
if (seconds <= 0) {
|
|
|
|
|
deadline_timer_stopped_ = true;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
LOG_VERB("Async wait deadline timer");
|
|
|
|
|
|
|
|
|
|
deadline_timer_stopped_ = false;
|
|
|
|
|
|
|
|
|
|
deadline_timer_.expires_after(std::chrono::seconds(seconds));
|
|
|
|
|
deadline_timer_.async_wait(std::bind(&Client::OnDeadlineTimer, this, _1));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Client::OnTimer(boost::system::error_code ec) {
|
|
|
|
|
LOG_VERB("On timer.");
|
|
|
|
|
void Client::OnDeadlineTimer(boost::system::error_code ec) {
|
|
|
|
|
LOG_VERB("On deadline timer");
|
|
|
|
|
|
|
|
|
|
deadline_timer_stopped_ = true;
|
|
|
|
|
|
|
|
|
|
// timer_.cancel() was called.
|
|
|
|
|
// deadline_timer_.cancel() was called.
|
|
|
|
|
if (ec == boost::asio::error::operation_aborted) {
|
|
|
|
|
LOG_VERB("Timer canceled.");
|
|
|
|
|
LOG_VERB("Deadline timer canceled");
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (closed_) {
|
|
|
|
|
LOG_VERB("Socket has been closed.");
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
LOG_WARN("Timeout");
|
|
|
|
|
|
|
|
|
|
if (timer_.expiry() <= boost::asio::steady_timer::clock_type::now()) {
|
|
|
|
|
// The deadline has passed. The socket is closed so that any outstanding
|
|
|
|
|
// asynchronous operations are canceled.
|
|
|
|
|
LOG_WARN("HTTP client timed out.");
|
|
|
|
|
error_.set_timeout(true);
|
|
|
|
|
// Cancel the async operations on the socket.
|
|
|
|
|
// OnXxx() will be called with `error::operation_aborted`.
|
|
|
|
|
if (connected_) {
|
|
|
|
|
Close();
|
|
|
|
|
return;
|
|
|
|
|
} else {
|
|
|
|
|
socket_->Close();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Put the actor back to sleep.
|
|
|
|
|
DoWaitTimer();
|
|
|
|
|
error_.set_timeout(true);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Client::CancelTimer() {
|
|
|
|
|
if (timer_canceled_) {
|
|
|
|
|
void Client::StopDeadlineTimer() {
|
|
|
|
|
if (deadline_timer_stopped_) {
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
LOG_INFO("Cancel timer...");
|
|
|
|
|
timer_.cancel();
|
|
|
|
|
LOG_INFO("Cancel deadline timer");
|
|
|
|
|
|
|
|
|
|
try {
|
|
|
|
|
// Cancel the async wait operation on this timer.
|
|
|
|
|
deadline_timer_.cancel();
|
|
|
|
|
} catch (const boost::system::system_error&) {
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
deadline_timer_stopped_ = true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
timer_canceled_ = true;
|
|
|
|
|
void Client::FinishRequest() {
|
|
|
|
|
{
|
|
|
|
|
std::lock_guard<std::mutex> lock{ request_mutex_ };
|
|
|
|
|
if (!request_finished_) {
|
|
|
|
|
request_finished_ = true;
|
|
|
|
|
} else {
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
request_cv_.notify_one();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
} // namespace webcc
|
|
|
|
|
|
Chunting Gu
4 years ago