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/*
* SPDX-FileCopyrightText: 2016 Mathieu Stefani
*
* SPDX-License-Identifier: Apache-2.0
*/
/* http_server.cc
Mathieu Stefani, 07 février 2016
Example of an http server
*/
#include <pistache/common.h>
#include <pistache/cookie.h>
#include <pistache/endpoint.h>
#include <pistache/http.h>
#include <pistache/http_headers.h>
#include <pistache/net.h>
#include <pistache/peer.h>
using namespace Pistache;
struct LoadMonitor
{
LoadMonitor(const std::shared_ptr<Http::Endpoint>& endpoint)
: endpoint_(endpoint)
, interval(std::chrono::seconds(1))
{ }
void setInterval(std::chrono::seconds secs)
{
interval = secs;
}
void start()
{
shutdown_ = false;
thread = std::make_unique<std::thread>([this] { run(); });
}
void shutdown()
{
shutdown_ = true;
}
~LoadMonitor()
{
shutdown_ = true;
if (thread)
thread->join();
}
private:
std::shared_ptr<Http::Endpoint> endpoint_;
std::unique_ptr<std::thread> thread;
std::chrono::seconds interval;
std::atomic<bool> shutdown_;
void run()
{
Tcp::Listener::Load old;
while (!shutdown_)
{
if (!endpoint_->isBound())
continue;
endpoint_->requestLoad(old).then([&](const Tcp::Listener::Load& load) {
old = load;
double global = load.global;
if (global > 100)
global = 100;
if (global > 1)
std::cout << "Global load is " << global << "%" << std::endl;
else
std::cout << "Global load is 0%" << std::endl;
},
Async::NoExcept);
std::this_thread::sleep_for(std::chrono::seconds(interval));
}
}
};
class MyHandler : public Http::Handler
{
HTTP_PROTOTYPE(MyHandler)
void onRequest(
const Http::Request& req,
Http::ResponseWriter response) override
{
if (req.resource() == "/ping")
{
if (req.method() == Http::Method::Get)
{
using namespace Http;
const auto& query = req.query();
if (query.has("chunked"))
{
std::cout << "Using chunked encoding" << std::endl;
response.headers()
.add<Header::Server>("pistache/0.1")
.add<Header::ContentType>(MIME(Text, Plain));
response.cookies()
.add(Cookie("lang", "en-US"));
auto stream = response.stream(Http::Code::Ok);
stream << "PO";
stream << "NG";
stream << ends;
}
else
{
response.send(Http::Code::Ok, "PONG");
}
}
}
else if (req.resource() == "/echo")
{
if (req.method() == Http::Method::Post)
{
response.send(Http::Code::Ok, req.body(), MIME(Text, Plain));
}
else
{
response.send(Http::Code::Method_Not_Allowed);
}
}
else if (req.resource() == "/stream_binary")
{
auto stream = response.stream(Http::Code::Ok);
char binary_data[] = "some \0\r\n data\n";
size_t chunk_size = 14;
for (size_t i = 0; i < 10; ++i)
{
stream.write(binary_data, chunk_size);
stream.flush();
}
stream.ends();
}
else if (req.resource() == "/exception")
{
throw std::runtime_error("Exception thrown in the handler");
}
else if (req.resource() == "/timeout")
{
response.timeoutAfter(std::chrono::seconds(2));
}
else if (req.resource() == "/static")
{
if (req.method() == Http::Method::Get)
{
Http::serveFile(response, "README.md").then([](PST_SSIZE_T bytes) {
std::cout << "Sent " << bytes << " bytes" << std::endl;
},
Async::NoExcept);
}
}
else
{
response.send(Http::Code::Not_Found);
}
}
void onTimeout(
const Http::Request& /*req*/,
Http::ResponseWriter response) override
{
response
.send(Http::Code::Request_Timeout, "Timeout")
.then([](PST_SSIZE_T) {}, PrintException());
}
};
int main(int argc, char* argv[])
{
Port port(9080);
int thr = 2;
if (argc >= 2)
{
port = static_cast<uint16_t>(std::stol(argv[1]));
if (argc == 3)
thr = std::stoi(argv[2]);
}
Address addr(Ipv4::any(), port);
std::cout << "Cores = " << hardware_concurrency() << std::endl;
std::cout << "Using " << thr << " threads" << std::endl;
auto server = std::make_shared<Http::Endpoint>(addr);
auto opts = Http::Endpoint::options()
.threads(thr);
server->init(opts);
server->setHandler(Http::make_handler<MyHandler>());
server->serve();
}
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