bool HttpDo()

in src/oslogin_utils.cc [434:481]
46 lines of code
10 McCabe index (conditional complexity)

bool HttpDo(const string& url, const string& data, string* response, long* http_code) {
  if (response == NULL || http_code == NULL) {
    return false;
  }
  CURLcode code(CURLE_FAILED_INIT);
  curl_global_init(CURL_GLOBAL_ALL & ~CURL_GLOBAL_SSL);
  CURL* curl = curl_easy_init();
  std::ostringstream response_stream;
  int retry_count = 0;
  if (curl) {
    struct curl_slist* header_list = NULL;
    header_list = curl_slist_append(header_list, "Metadata-Flavor: Google");
    if (header_list == NULL) {
      curl_easy_cleanup(curl);
      curl_global_cleanup();
      return false;
    }
    do {
      // Apply backoff strategy before retrying.
      if (retry_count > 0) {
        sleep(kBackoffDuration);
      }
      response_stream.str("");
      response_stream.clear();
      curl_easy_setopt(curl, CURLOPT_HTTPHEADER, header_list);
      curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &OnCurlWrite);
      curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response_stream);
      curl_easy_setopt(curl, CURLOPT_TIMEOUT, 5);
      curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
      if (data != "") {
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data.c_str());
      }

      code = curl_easy_perform(curl);
      if (code != CURLE_OK) {
        curl_easy_cleanup(curl);
        curl_global_cleanup();
        return false;
      }
      curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, http_code);
    } while (retry_count++ < kMaxRetries && ShouldRetry(*http_code));
    curl_slist_free_all(header_list);
  }
  *response = response_stream.str();
  curl_easy_cleanup(curl);
  curl_global_cleanup();
  return true;
}