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#include <cpprest/http_listener.h>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <thread>
#include <chrono>
#include <ctime>
// cpprest provides macros for all streams but std::clog in basic_types.h
#ifdef _UTF16_STRINGS
// On Windows, all strings are wide
#define uclog std::wclog
// On POSIX platforms, all strings are narrow
#define uclog std::clog
#endif // endif _UTF16_STRINGS
using namespace std;
using namespace web::http::experimental::listener;
using namespace web::http;
using namespace web;
void respond(const http_request& request, const status_code& status, const json::value& response) {
json::value resp;
resp[U("status")] = json::value::number(status);
resp[U("response")] = response;
// Pack in the current time for debugging purposes.
time_t now = time(0);
utility::stringstream_t ss;
ss << put_time(localtime(&now), L"%Y-%m-%dT%H:%S:%MZ");
resp[U("server_time")] = json::value::string(ss.str());
request.reply(status, resp);
int main()
// Synchronously bind the listener to all nics.
uclog << U("Starting listener.") << endl;
http_listener listener(U("http://*/json"));;
// Handle incoming requests.
uclog << U("Setting up JSON listener.") << endl;, [] (http_request req) {
auto http_get_vars = uri::split_query(req.request_uri().query());
auto found_name = http_get_vars.find(U("request"));
if (found_name == end(http_get_vars)) {
auto err = U("Request received with get var \"request\" omitted from query.");
uclog << err << endl;
respond(req, status_codes::BadRequest, json::value::string(err));
auto request_name = found_name->second;
uclog << U("Received request: ") << request_name << endl;
respond(req, status_codes::OK, json::value::string(U("Request received for: ") + request_name));
// Wait while the listener does the heavy lifting.
// TODO: Provide a way to safely terminate this loop.
uclog << U("Waiting for incoming connection...") << endl;
while(true) {
// Nothing left to do but commit suicide.
uclog << U("Terminating JSON listener.") << endl;
return 0;
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