Implementing libcurl

From Valve Developer Community

Jump to: navigation, search
Deutsch

Contents

libcurl is a free library that can download data from the internet. It supports just about every protocol imaginable, and is available under a MIT/X derivative license.

Implementation

Windows

  1. Download the latest version of libcurl.
  2. Extract the \lib and \include folders to a convenient location.
  3. Open libcurl's VS project and change it to Release mode.
  4. Go to libcurl > Properties > C/C++ > Preprocessor > Definitions and add CURL_STATICLIB. Unless you really do want to use LDAP, add HTTP_ONLY too.
  5. Go to libcurl > Properties > C/C++ > Code Generation > Runtime Library and change it to read Multi-threaded (/MT).
  6. Build libcurl.
  7. Add libcurl.lib to your main project. The easiest way is to drag it onto the Solution Explorer.
  8. Go to Your Project > Properties > C/C++ > Preprocessor > Definitions and add CURL_STATICLIB, as you did to curl itself.
  9. Go to Your Project > Properties > C/C++ > General > Additional Include Directories and add the libcurl \include folder you extracted earlier.
  10. Go to Your Project > Linker > Input > Additional Dependencies and add ws2_32.lib. If you want to use LDAP, add wldap32.lib as well.
  11. #include "curl/curl.h" and start coding!
Note:Remember that you will need to repeat steps 8-10 in both Release and Debug configurations.

Linux

To do

Usage

Here is how to write the contents of a web page to the console:

#include "curl/curl.h"
 
// Called when curl receives data from the server
static size_t rcvData(void *ptr, size_t size, size_t nmemb, void *userdata)
{
	Msg((char*)ptr); // up to 989 characters each time
	return size * nmemb;
}
 
void PrintPage()
{
        CURL *curl;
	curl = curl_easy_init();
	curl_easy_setopt(curl, CURLOPT_URL, "developer.valvesoftware.com");
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, rcvData);
	curl_easy_perform(curl);
	curl_easy_cleanup(curl);
}
 
ConCommand print_page("print_page", PrintPage);
Personal tools
Namespaces
Variants
Actions