C++ LibCurl - Converting CURLcode into a CString

Question

What would be the easiest way to convert the "res" variable (CURLcode) into a CString?

Here's the standard example which compiles fine on my machine but I want to use this in a MFC app and display the result as a MessageBox. Any help is appreciated!

#include <curl/curl.h>

int main(void)
{
  CURL *curl;
  CURLcode res;

  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
    res = curl_easy_perform(curl);

    /* always cleanup */ 
    curl_easy_cleanup(curl);
  }
  return 0;
}

score 12 · Accepted Answer · edited Mar 17 '23 at 22:25

12

You can use curl_easy_strerror function.

CString str(curl_easy_strerror(res));

or

CString str;
str.Format("curl_easy_perform return %s [%d]",curl_easy_strerror(res),res);

edited Mar 17 '23 at 22:25

Benjamin Loison

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answered Aug 23 '11 at 19:02

vromanov

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1

It seems you need to use curl_easy_setopt(curl,CURLOPT_ERRORBUFFER,myBuffer) first, based on http://curl.haxx.se/libcurl/c/curl_easy_setopt.html – Suma Jun 26 '12 at 14:22
For some reason I can't get CString to be recognized. I'm including `curl/curl.h`, do I need anything else? – intrigued_66 Feb 02 '23 at 18:42

score 3 · Answer 2 · answered Aug 23 '11 at 17:05

3

A CURLcode is a number, so after 4 seconds on Google and having never used MFC, I found you can do this:

CString str;
str.Format("%d", res);

answered Aug 23 '11 at 17:05

Seth Carnegie

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Color me embarassed. Thank you – kogh Aug 23 '11 at 17:14
2

@kogh The second answer is probably a lot better, converting into a sensible string instead of a number only. – Suma Jun 26 '12 at 13:57

C++ LibCurl - Converting CURLcode into a CString

2 Answers2