[使用libcurl，C ++的POST请求失败，“>

Question

TEST(ApiTest, TestPostMethod) {
  CURL *curl;
  CURLcode res;
  curl_global_init(CURL_GLOBAL_ALL);
  curl = curl_easy_init();
  if (curl) {
    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
    std::string url = "https://postman-echo.com/post";
    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
    curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
    struct curl_slist *headers = NULL;
    // curl_slist_append(headers, "HOST:  postman-echo.com");
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
    ASSERT_EQ(CURLE_OK, res);
  }
}
错误：CURLE_COULDNT_RESOLVE_HOST（6）

当我在邮递员上测试此POST请求时，它按预期工作。还curl命令curl --location --request POST 'https://postman-echo.com/post'工作正常。

Expected equality of these values:
  CURLE_OK
    Which is: 0
  res
    Which is: 6
按照@Andreas Wenzel的建议运行NSLOOKUP

> postman-echo.com
Server:     75.75.75.75
Address:    75.75.75.75#53

Non-authoritative answer:
Name:   postman-echo.com
Address: 3.210.84.203
Name:   postman-echo.com
Address: 52.22.211.29

TEST（ApiTest，TestPostMethod）{CURL * curl; CURLcode资源； curl_global_init（CURL_GLOBAL_ALL）; curl = curl_easy_init（）; if（curl）{curl_easy_setopt（curl，CURLOPT_CUSTOMREQUEST，“ POST”）; ...

Answer 1

https://github.com/alexzk1/ed_highway/blob/master/utils/restclient.cpp