cURL really is an awesome library and in cpp::daily we’re basically going to talk about using it with C++ ! We made a video with lots of details on how to use cURL via the command line and you can see this link: 12 TIPS for you to use the curl COMMAND as a NINJA .
But using it with C++ is a little more arduous task, but possible because many applications are made using cURL .
First of all make sure you have the cURL library installed on your system, examples:
Remember that it’s not the command, it’s the library
Using with C++
There are many particularities in both writing code and compiling. But to keep it simple (because in the future we will have a more detailed video about cURL with C++), I’ll show you a code example that accesses the address: https://gnu.terminalroot.com.br/ip.php that returns access data like: Operating Systems, Browser, Architecture and IP number and we will get it with C++ .
Note that we need to include the header:
#include <curl/curl.h> and instantiate the CURL class, we also use the
size_t WriteCallback function to show us the return. Read and analyze the entire code for greater understanding.
And to compile we need to inform the library to the compiler, for example:
If we run
./get-data we will notice that the output will be with the data informed above, but we can filter and then get our IP address: global
Just with this basic example you can “have fun” with several possibilities!