[Cppcms-users] Json-rpc combined with regular dynamic pages

[Ronnie C. <ron...@db...>]

Hi

I'm trying to get a test hello world type app working but I don't seem to be 
able to route RPC requests to the appropriate handler.

The regular url routing works fine. I think it's probably in the way I 
construct my request in javascript but I'm not sure. Here's the simplest 
code demonstrating what I'm trying to achieve.

class hello : public cppcms::application {
public: 
	hello(cppcms::service& svc) : cppcms::application(svc) {
		parse_options("VegaWeb.cfg");
		dispatcher().assign("",&hello::welcome,this);
		mapper().assign("");
		mapper().root("/hello");
	}
	void welcome();
private:
};


void hello::welcome() {
	VegaData::message m;
	m.text = "Hello";
	render("message",m);
}


class rpc : public cppcms::rpc::json_rpc_server {
public:
	rpc(cppcms::service& svc) : cppcms::rpc::json_rpc_server(svc) {
		
bind("div",cppcms::rpc::json_method(&rpc::div,this),method_role);
	};

	void div(int x, int y) {
		if(y == 0)
			return_error("Division by 0");
		else
			return_result(x/y);
	}
};

int main(int argc,char** argv) {
	try {
		cppcms::service srv(argc,argv);
		
srv.applications_pool().mount(cppcms::applications_factory<hello>());
		
srv.applications_pool().mount(cppcms::applications_factory<rpc>());
		srv.run();
	} catch(std::exception const &e){
		std::cerr << e.what() << std::endl;
	}
	return 0;
}



// script.js

$(document).ready(function () {

	$("#button").click(function() {
	var xhr = new XMLHttpRequest();
	xhr.open("post", '/rpc');
	// Required by JSON-RPC over HTTP
	xhr.setRequestHeader("Content-Type","application/json");

	var x=2; // hardcode
	var y=3;
	var request = '{"method":"div","params":[' + x + ',' + y 
+'],"id":1}';

	xhr.onreadystatechange = function() {
		if (xhr.readyState === 4) {
			var res;
			if(xhr.status === 200) {
				// Don't call eval in real code use some 
parser
				var result = eval('(' + xhr.responseText + 
')');
				if(result.error==null) {
					res = result.result;
				}
				else {
					res = result.error;
				}
			}
			else {
				res = 'Invalid Status ' + xhr.status;
			}
			document.getElementById('result').innerHTML = res;
		}
	}
	xhr.send(request); 
	return false;

	});
});


config.js

{  
    "service" : {  
        "api" : "http",
        "port" : 8081  
    },  
    "http" : {  
        "script_names" : [ "/hello"  ] ,
		"script" : "/rpc",
    },
	"file_server" : {
		"enable" : true,
		"mime_types" : "mime.types"
	}
}