metar.cpp

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#include <boost/date_time/posix_time/conversion.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <curl/curl.h>
#include <iostream>
#include <string>
 
#include "utils.hpp"
 
namespace tools {
size_t writeFunction(void *ptr, size_t size, size_t nmemb, std::string *data) {
  data->append((char *)ptr, size * nmemb);
  return size * nmemb;
}
 
std::string getMetar(std::string ICAO) {
  std::string metarInfo;
  const std::string url =
      "https://tgftp.nws.noaa.gov/data/observations/metar/stations/" + ICAO +
      ".TXT";
 
  CURL *curl;
  CURLcode res;
 
  curl_global_init(CURL_GLOBAL_DEFAULT);
 
  curl = curl_easy_init();
  if (!curl) {
    log_cmd("Unable to initalize CURL", "CURL",
            boost::posix_time::to_time_t(
                boost::posix_time::second_clock::universal_time()),
            LOG::Error);
    return "Failed";
  }
 
  curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeFunction);
  curl_easy_setopt(curl, CURLOPT_WRITEDATA, &metarInfo);
 
  res = curl_easy_perform(curl);
  if (res != CURLE_OK)
    log_cmd(curl_easy_strerror(res), "CURL",
            boost::posix_time::to_time_t(
                boost::posix_time::second_clock::universal_time()),
            LOG::Error);
 
  curl_easy_cleanup(curl);
  curl_global_cleanup();
 
  return metarInfo;
}
} // namespace tools