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Bug #7039 » issue_7034_2.cpp

Roel Standaert, 07/09/2019 05:46 PM

 
#include <Wt/WApplication.h>
#include <Wt/WContainerWidget.h>
#include <Wt/WPushButton.h>
#include <Wt/WJavaScript.h>
#include <Wt/WServer.h>
#include <Wt/WStringStream.h>

#include <functional>
#include <string>

constexpr const int STRING_SIZE = 2000000;

class Application : public Wt::WApplication {
public:
Application(const Wt::WEnvironment &env);

private:
Wt::JSignal<std::string> signal_;
};

Application::Application(const Wt::WEnvironment &env)
: WApplication(env),
signal_(this, "largeSignal")
{
auto button = root()->addNew<Wt::WPushButton>(Wt::utf8("Send large signal"));

Wt::WStringStream ss;
ss << "function(){"
"" "function randChar(){"
"" "var i=Math.floor(Math.random() * 26);"
"" "return String.fromCharCode(97+i);"
"" "}"
"" "var s='';"
"" "while(s.length<" << STRING_SIZE << "){"
"" "s+=randChar();"
"" "}"
"" << signal_.createCall({"s"}) << ";"
"}";

button->clicked().connect(ss.str());

signal_.connect([](const std::string &s){
std::cout << "Received string, length: " << s.size() << '\n';
});
}

int main(int argc, char *argv[])
{
return Wt::WRun(argc, argv, [](const Wt::WEnvironment &env) {
return std::make_unique<Application>(env);
});
}
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