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libhv
Like libevent, libev, and libuv,
libhv provides event-loop with non-blocking IO and timer,
but simpler api and richer protocols.
✨ Features
- Cross-platform (Linux, Windows, macOS, Android, iOS, BSD, Solaris)
- High-performance EventLoop (IO, timer, idle, custom, signal)
- TCP/UDP client/server/proxy
- TCP supports heartbeat, reconnect, upstream, MultiThread-safe write and close, etc.
- Built-in common unpacking modes (FixedLength, Delimiter, LengthField)
- RUDP support: WITH_KCP
- SSL/TLS support: (via WITH_OPENSSL or WITH_GNUTLS or WITH_MBEDTLS)
- HTTP client/server (support https http1/x http2 grpc)
- HTTP supports static service, indexof service, forward/reverse proxy service, sync/async API handler
- HTTP supports RESTful, router, middleware, keep-alive, chunked, SSE, etc.
- WebSocket client/server
- MQTT client
- Redis client
⌛️ Build
see BUILD.md
Makefile:
./configure
make
sudo make install
or cmake:
mkdir build
cd build
cmake ..
cmake --build .
or bazel:
bazel build libhv
or vcpkg:
vcpkg install libhv
or xmake:
xrepo install libhv
⚡️ Getting Started
run ./getting_started.sh:
git clone https://github.com/ithewei/libhv.git
cd libhv
./configure
make
bin/httpd -h
bin/httpd -d
#bin/httpd -c etc/httpd.conf -s restart -d
ps aux | grep httpd
# http file service
bin/curl -v localhost:8080
# http indexof service
bin/curl -v localhost:8080/downloads/
# http api service
bin/curl -v localhost:8080/ping
bin/curl -v localhost:8080/echo -d "hello,world!"
bin/curl -v localhost:8080/query?page_no=1\&page_size=10
bin/curl -v localhost:8080/kv -H "Content-Type:application/x-www-form-urlencoded" -d 'user=admin&pswd=123456'
bin/curl -v localhost:8080/json -H "Content-Type:application/json" -d '{"user":"admin","pswd":"123456"}'
bin/curl -v localhost:8080/form -F 'user=admin' -F 'pswd=123456'
bin/curl -v localhost:8080/upload -d "@LICENSE"
bin/curl -v localhost:8080/upload -F "file=@LICENSE"
bin/curl -v localhost:8080/test -H "Content-Type:application/x-www-form-urlencoded" -d 'bool=1&int=123&float=3.14&string=hello'
bin/curl -v localhost:8080/test -H "Content-Type:application/json" -d '{"bool":true,"int":123,"float":3.14,"string":"hello"}'
bin/curl -v localhost:8080/test -F 'bool=1' -F 'int=123' -F 'float=3.14' -F 'string=hello'
# RESTful API: /group/:group_name/user/:user_id
bin/curl -v -X DELETE localhost:8080/group/test/user/123
# benchmark
bin/wrk -c 1000 -d 10 -t 4 http://127.0.0.1:8080/
TCP
tcp server
c version: examples/tcp_echo_server.c
c++ version: evpp/TcpServer_test.cpp
#include "TcpServer.h"
using namespace hv;
int main() {
int port = 1234;
TcpServer srv;
int listenfd = srv.createsocket(port);
if (listenfd < 0) {
return -1;
}
printf("server listen on port %d, listenfd=%d ...\n", port, listenfd);
srv.onConnection = [](const SocketChannelPtr& channel) {
std::string peeraddr = channel->peeraddr();
if (channel->isConnected()) {
printf("%s connected! connfd=%d\n", peeraddr.c_str(), channel->fd());
} else {
printf("%s disconnected! connfd=%d\n", peeraddr.c_str(), channel->fd());
}
};
srv.onMessage = [](const SocketChannelPtr& channel, Buffer* buf) {
// echo
channel->write(buf);
};
srv.setThreadNum(4);
srv.start();
// press Enter to stop
while (getchar() != '\n');
return 0;
}
tcp client
c version: examples/tcp_client_test.c
c++ version: evpp/TcpClient_test.cpp
#include <iostream>
#include "TcpClient.h"
using namespace hv;
int main() {
int port = 1234;
TcpClient cli;
int connfd = cli.createsocket(port);
if (connfd < 0) {
return -1;
}
cli.onConnection = [](const SocketChannelPtr& channel) {
std::string peeraddr = channel->peeraddr();
if (channel->isConnected()) {
printf("connected to %s! connfd=%d\n", peeraddr.c_str(), channel->fd());
} else {
printf("disconnected to %s! connfd=%d\n", peeraddr.c_str(), channel->fd());
}
};
cli.onMessage = [](const SocketChannelPtr& channel, Buffer* buf) {
printf("< %.*s\n", (int)buf->size(), (char*)buf->data());
};
cli.start();
std::string str;
while (std::getline(std::cin, str)) {
if (str == "close") {
cli.closesocket();
} else if (str == "start") {
cli.start();
} else if (str == "stop") {
cli.stop();
break;
} else {
if (!cli.isConnected()) break;
cli.send(str);
}
}
return 0;
}
HTTP
http server
see examples/http_server_test.cpp
golang gin style
#include "HttpServer.h"
using namespace hv;
int main() {
HttpService router;
router.GET("/ping", [](HttpRequest* req, HttpResponse* resp) {
return resp->String("pong");
});
router.GET("/data", [](HttpRequest* req, HttpResponse* resp) {
static char data[] = "0123456789";
return resp->Data(data, 10);
});
router.GET("/paths", [&router](HttpRequest* req, HttpResponse* resp) {
return resp->Json(router.Paths());
});
router.GET("/get", [](HttpRequest* req, HttpResponse* resp) {
resp->json["origin"] = req->client_addr.ip;
resp->json["url"] = req->url;
resp->json["args"] = req->query_params;
resp->json["headers"] = req->headers;
return 200;
});
router.POST("/echo", [](const HttpContextPtr& ctx) {
return ctx->send(ctx->body(), ctx->type());
});
HttpServer server(&router);
server.setPort(8080);
server.setThreadNum(4);
server.run();
return 0;
}
http client
see examples/http_client_test.cpp
python requests style
#include "requests.h"
int main() {
auto resp = requests::get("http://www.example.com");
if (resp == NULL) {
printf("request failed!\n");
} else {
printf("%s\n", resp->body.c_str());
}
resp = requests::post("127.0.0.1:8080/echo", "hello,world!");
if (resp == NULL) {
printf("request failed!\n");
} else {
printf("%s\n", resp->body.c_str());
}
return 0;
}
WebSocket
WebSocket server
see examples/websocket_server_test.cpp
#include "WebSocketServer.h"
using namespace hv;
int main(int argc, char** argv) {
WebSocketService ws;
ws.onopen = [](const WebSocketChannelPtr& channel, const HttpRequestPtr& req) {
printf("onopen: GET %s\n", req->Path().c_str());
};