C++ Tone Checker

C++ has no standard HTTP client, so this example uses libcurl.

#include <curl/curl.h>
#include <cstdlib>
#include <iostream>
#include <stdexcept>
#include <string>

int main() {
  const char* key = std::getenv("SAPLING_API_KEY");
  if (key == nullptr) {
    throw std::runtime_error("Set SAPLING_API_KEY first.");
  }

  CURL* curl = curl_easy_init();
  if (curl == nullptr) {
    throw std::runtime_error("Could not initialize libcurl.");
  }

  std::string authorization = std::string("Authorization: Bearer ") + key;
  curl_slist* headers = nullptr;
  headers = curl_slist_append(headers, authorization.c_str());
  headers = curl_slist_append(headers, "Content-Type: application/json");

  const std::string payload =
      R"({"text":"Really stoked about this! Will it be ready by next week?"})";

  curl_easy_setopt(curl, CURLOPT_URL, "https://api.sapling.ai/api/v1/tone");
  curl_easy_setopt(curl, CURLOPT_POST, 1L);
  curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
  curl_easy_setopt(curl, CURLOPT_POSTFIELDS, payload.c_str());

  const CURLcode result = curl_easy_perform(curl);
  long status = 0;
  curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &status);

  curl_slist_free_all(headers);
  curl_easy_cleanup(curl);

  if (result != CURLE_OK || status < 200 || status >= 300) {
    std::cerr << "Request failed: " << curl_easy_strerror(result)
              << " (HTTP " << status << ")\n";
    return 1;
  }
  return 0;
}