Linked libcurl with mear. Now working on refining and making things cleaner for authentication

app/src/main/cpp/Demo.cpp

@@ -16,27 +16,100 @@
 #include <sys/mman.h>
 
 #include "nlohmann/json.hpp"
+#include <curl/curl.h>
 
 #include "model/Song.h"
+#include "model/User.h"
+
+
+std::string fetchToken();
 
 model::Song initSong();
+model::User initUser();
+
+size_t funcTest(void*, size_t, size_t, char*);
+//size_t funcTest(void*, size_t, size_t, std::string&);
 
 int demoCall();
 
 void printSong(const model::Song&);
 
 
+std::string fetchToken()
+{
+    auto user = initUser();
+    nlohmann::json usr;
+    usr["username"] = user.username;
+    usr["password"] = user.password;
+
+    CURL *curl;
+    CURLcode res;
+
+    curl = curl_easy_init();
+
+    std::string tok;
+    if (curl) {
+        const auto url = "";
+
+        char resp[2048];
+        curl_easy_setopt(curl, CURLOPT_URL, url);
+        const std::string a = usr.dump();
+        //std::string r;
+        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, a.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, funcTest);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, resp);
+        //curl_easy_setopt(curl, CURLOPT_WRITEDATA, r);
+        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
+
+        res = curl_easy_perform(curl);
+        curl_easy_cleanup(curl);
+
+        const std::string i = resp;
+        auto s = nlohmann::json::parse(i);
+        tok = s["token"].get<std::string>();
+        return tok;
+   }
+
+   return "";
+}
+
+
 model::Song initSong()
 {
     model::Song song;
     song.title = "hello";
     song.artist = "some artist";
 
-
     return song;
 }
 
 
+model::User initUser()
+{
+    model::User user;
+    user.username = "";
+    user.password = "";
+
+    return user;
+}
+
+
+size_t funcTest(void* ptr, size_t size, size_t nmemb, char *e)
+{
+    std::memcpy(e, ptr, nmemb);
+    e[nmemb] = '\0';
+
+    return nmemb;
+}
+
+size_t funcTest(void* ptr, size_t size, size_t nmemb, std::string& e)
+{
+    e = (char*) ptr;
+
+    return nmemb;
+}
+
+
 int demoCall()
 {
     model::Song song = initSong();
@@ -76,5 +149,5 @@ Java_com_example_mear_activities_DemoStreamActivity_test(
         JNIEnv *env,
         jobject /* this */) {
 
-    demoCall();
+    auto tok = fetchToken();
 }