File content as of revision 36:00496782708e:

//=====[Libraries]=============================================================

// Se incluye como parte de la la clase HTTP
#include "select-demo.h"
#if DEMO == MAIN

#include "mbed.h"
#include "http_request.h"
#include "network-helper.h"
#include "mbed_mem_trace.h"

#include <stdio.h>
#include <string.h>

//=====[Declaration and initialization of public global objects]===============

//=====[Declaration and initialization of public global variables]=============

//=====[Declarations (prototypes) of public functions]=========================

void response(HttpResponse* res);

//=====[Main function, the program entry point after power on or reset]========

int main() {
    printf("\n----- Ejemplo de test REST Client -----\n");
    // Conéctese a la red con la interfaz de red predeterminada
    NetworkInterface* network = connect_to_default_network_interface();
    if (!network) {
        printf("No se puede conectar a la red\n");
        return 1;
    }

    // Se realiza la solicitud GET
    {
        // De forma predeterminada, el cuerpo se analiza y almacena automáticamente en un búfer, esto es una gran cantidad de memoria.
        // Para recibir una respuesta fragmentada, pase una devolución de llamada como último parámetro al constructor.
        HttpRequest* get_req = new HttpRequest(network, HTTP_GET, "http://192.168.1.75:3000/mediciones");

        HttpResponse* get_res = get_req->send();
        if (!get_res) {
            printf("HttpRequest failed (error code %d)\n", get_req->get_error());
            return 1;
        }

        printf("\n----- HTTP GET response -----\n");
        response(get_res);

        delete get_req;
    }

    // Solicitud POST
    {
        HttpRequest* post_req = new HttpRequest(network, HTTP_POST, "http://192.168.1.75:3000/mediciones");
        post_req->set_header("Content-Type", "application/json");

        const char body[] = "{\"uuid\":\"12345\",\"valor\":12.34}";

        HttpResponse* post_res = post_req->send(body, strlen(body));
        if (!post_res) {
            printf("HttpRequest failed (error code %d)\n", post_req->get_error());
            return 1;
        }

        printf("\n----- HTTP POST response -----\n");
        response(post_res);

        delete post_req;
    }

    wait(osWaitForever);
}

//=====[Implementations of public functions]===================================

void response(HttpResponse* res) {
    printf("Status: %d - %s\n", res->get_status_code(), res->get_status_message().c_str());

    printf("Headers:\n");
    for (size_t ix = 0; ix < res->get_headers_length(); ix++) {
        printf("\t%s: %s\n", res->get_headers_fields()[ix]->c_str(), res->get_headers_values()[ix]->c_str());
    }
    printf("\nBody (%d bytes):\n\n%s\n", res->get_body_length(), res->get_body_as_string().c_str());
}

#endif