cppcms - why is hello world with url mapping not working?
Question
I am having trouble with cppcms hello world example with url mapping.
I am having trouble with understanding this part:
int main(int argc,char ** argv)
{
try {
cppcms::service srv(argc,argv);
srv.applications_pool().mount(
cppcms::applications_factory<hello>() //i do not understand this part
);
srv.run();
}
catch(std::exception const &e) {
std::cerr << e.what() << std::endl;
}
}
In tutorial said /hello - welcome function would be called but that is not what is happening. This method is called instead:
void hello::main(std::string /*url*/)
{
response().out() <<
"<html>\n"
"<body>\n"
" <h1>Hello World</h1>\n"
"</body>\n"
"</html>\n";
}
Welcome method look like this and it is defined in a scope of hello class:
void welcome()
{
response().out() <<
"<h1> Welcome To Page with links </h1>\n"
"<a href='" << url("/number",1) << "'>1</a><br>\n"
"<a href='" << url("/number",15) << "'>15</a><br>\n"
"<a href='" << url("/smile") << "' >:-)</a><br>\n";
}
I need some answers if you can help me. I am just trying to understand so if you could point me to right direction it would be great.
2 answers
solution1
3 ACCPTED 2013-10-08 20:03:57
You need to setup the mapping in your hello constructor, as shown in both the hello world example and the link you posted in your answer.
In particular, this part:
dispatcher().assign("",&hello::welcome,this);
mapper().assign("");
mapper().root("/hello");
This maps the default route of the hello application to the "welcome" method. If you don't set a mapping, it's going to default to main.
solution2
0 2013-10-08 22:50:51
I do not personally know much about this library, however it looks like in the line:
cppcms::applications_factory<hello>()
Your assosating the server with, and instantaiteing some sort of hello class. However I
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.