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non blocking semantics for receiving soeckts and the tcp acceptor
tests updated documentation updated and improved
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| TcpServerNonBlocking --port 35998 --clients 2 | ||
| TcpClient --port 35998 | ||
| TcpClient --port 35998 --rate 400 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /** | ||
| * Author: Andrea Casalino | ||
| * Created: 16.05.2019 | ||
| * | ||
| * report any bug to [email protected]. | ||
| **/ | ||
|
|
||
| /////////////////////////////////////////////////////////////////////////// | ||
| // Have a look to README.md // | ||
| /////////////////////////////////////////////////////////////////////////// | ||
|
|
||
| // elements from the MinimalSocket library | ||
| #include <MinimalSocket/tcp/TcpServer.h> | ||
|
|
||
| // just a bunch of utilities | ||
| #include <Args.h> | ||
| #include <Pollables.h> | ||
| #include <Respond.h> | ||
| #include <TimeOfDay.h> | ||
|
|
||
| #include <functional> | ||
| #include <list> | ||
| using namespace std; | ||
|
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| int main(const int argc, const char **argv) { | ||
| cout << "----------------------- Server -----------------------" << endl; | ||
| PARSE_ARGS | ||
|
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| const auto server_port = options->getValue<MinimalSocket::Port>("port"); | ||
| const auto max_clients = options->getValue<int>("clients", 0); | ||
| const auto family = options->getValue<MinimalSocket::AddressFamily>( | ||
| "family", MinimalSocket::AddressFamily::IP_V4); | ||
|
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| MinimalSocket::tcp::TcpServer<false> server(server_port, family); | ||
|
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| if (!server.open()) { | ||
| cerr << "Failed to bind and listen to specified port" << endl; | ||
| return EXIT_FAILURE; | ||
| } | ||
| cout << "Listening for new clients on port " << server_port << endl; | ||
|
|
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| std::size_t connected = 0; | ||
| std::list<MinimalSocket::tcp::TcpConnectionNonBlocking> connections; | ||
| MinimalSocket::samples::Pollables pollables; | ||
|
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| auto create_pollable_connection = | ||
| [&](MinimalSocket::tcp::TcpConnectionNonBlocking &&connection) { | ||
| auto &conn = connections.emplace_back( | ||
| std::forward<MinimalSocket::tcp::TcpConnectionNonBlocking>( | ||
| connection)); | ||
| return [conn = &conn]() { | ||
| // poll the connection by doing a non blocking receive | ||
| try { | ||
| auto request = conn->receive(500); | ||
| if (request.empty()) { | ||
| return MinimalSocket::samples::PollableStatus::NOT_ADVANCED; | ||
| } | ||
| const auto &response = | ||
| MinimalSocket::samples::NamesCircularIterator::NAMES_SURNAMES | ||
| .find(request) | ||
| ->second; | ||
| cout << MinimalSocket::samples::TimeOfDay{} | ||
| << " received: " << request << " ; sending: " << response | ||
| << endl; | ||
| conn->send(response); | ||
| } catch (const MinimalSocket::SocketError &) { | ||
| // if here the connection was closed | ||
| return MinimalSocket::samples::PollableStatus::COMPLETED; | ||
| } | ||
| return MinimalSocket::samples::PollableStatus::ADVANCED; | ||
| }; | ||
| }; | ||
|
|
||
| pollables.emplace([&]() { | ||
| // poll the acceptor by trying to accept a new client | ||
| auto maybe_new_connection = server.acceptNewNonBlockingClient(); | ||
| if (maybe_new_connection.has_value()) { | ||
| cout << MinimalSocket::samples::TimeOfDay{} | ||
| << " connected a new client from " | ||
| << MinimalSocket::to_string(maybe_new_connection->getRemoteAddress()) | ||
| << endl; | ||
| pollables.emplace( | ||
| create_pollable_connection(std::move(maybe_new_connection.value()))); | ||
| return (max_clients != 0 && ++connected == max_clients) | ||
| ? MinimalSocket::samples::PollableStatus::COMPLETED | ||
| : MinimalSocket::samples::PollableStatus::ADVANCED; | ||
| } | ||
| return MinimalSocket::samples::PollableStatus::NOT_ADVANCED; | ||
| }); | ||
|
|
||
| pollables.loop(std::chrono::seconds{5}); | ||
|
|
||
| return EXIT_SUCCESS; | ||
| } |
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