|
|
|
#include <Wt/WServer>
|
|
#include <Wt/WResource>
|
|
#include <Wt/Http/Client>
|
|
#include <Wt/Http/Response>
|
|
|
|
#include <memory>
|
|
#include <atomic>
|
|
#include <iostream>
|
|
|
|
// CMD:
|
|
// C:> server.exe --http-address 0.0.0.0 --docroot .
|
|
|
|
// Terminal (in parallel):
|
|
// $ while [ "$(curl -s 'http://localhost/FetchData')" == "done" ]; do echo -n '.'; sleep 1; done
|
|
|
|
class FetchData : public Wt::WResource {
|
|
public:
|
|
FetchData (Wt::WServer& server) : server(server) { }
|
|
~FetchData () override { beingDeleted(); }
|
|
|
|
void handleRequest (const Wt::Http::Request& /*request*/, Wt::Http::Response& response) override
|
|
{
|
|
std::atomic<bool> done = false;
|
|
auto client = std::make_unique<Wt::Http::Client>();
|
|
|
|
client->done().connect([&] (boost::system::error_code err, const Wt::Http::Message& /*response*/, ...) {
|
|
if (err) server.log("error") << err.message();
|
|
done = true;
|
|
});
|
|
|
|
if (client->get("http://localhost/data")) {
|
|
while (!done) {
|
|
boost::this_thread::sleep_for(boost::chrono::milliseconds{25});
|
|
}
|
|
}
|
|
else {
|
|
server.log("error") << "something is wrong with the url";
|
|
}
|
|
|
|
response.out().write("done", 4);
|
|
}
|
|
|
|
private:
|
|
Wt::WServer& server;
|
|
};
|
|
|
|
class ServeData : public Wt::WResource {
|
|
public:
|
|
ServeData () = default;
|
|
~ServeData () override { beingDeleted(); }
|
|
|
|
void handleRequest (const Wt::Http::Request& /*request*/, Wt::Http::Response& /*response*/) override
|
|
{
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int main (int argc, char** argv)
|
|
try {
|
|
Wt::WServer wserver{argc, argv};
|
|
|
|
FetchData fetchdata(wserver);
|
|
wserver.addResource(&fetchdata, "/FetchData");
|
|
|
|
ServeData servedata;
|
|
wserver.addResource(&servedata, "/Data");
|
|
|
|
wserver.run();
|
|
|
|
return 0;
|
|
}
|
|
catch (std::exception& e) {
|
|
std::cerr << e.what() << std::endl;
|
|
return 10;
|
|
}
|
|
|
